PRODUCTS GUIDE
Nippon Koei Power & Digital Business Unit

Our Advanced Technology
Opens Up the FutureINTRODUCTION

Our Power Infrastructure Production Bases
Inherit the "Monozukuri" DNA of Our Frontier Spirit
Nippon Koei was established in 1946. The blocking coils (line traps), which were our first product, represent thestarting point of our "monozukuri "(Japanese-style manufacturing), which was born from the ingenuity and passion of ourengineers amidst the postwar turmoil and shortage of goods.
Since then, driven by the will to contribute to society through technology, we have gone on to develop one after another original products for the electric power industry. This frontier spirit with regard to "monozukuri " became the driving
force that allowed us to grow from a small town factory in Kawasaki to a worldwide manufacturer specialized in the fieldsof power generation and transformation.
Later on, our "monozukuri " base shifted to Tokyo, Yokohama, and other locations, and new comprehensive manufacturing facilities have been established in Sukagawa City, Fukushima in 2002. The Nippon Koei Power & Digital Business
Unit is the “Monozukuri Group” that inherits the company founder's DNA and whose comprehensive operations encompass everything from the design and manufacture of electric power industry-related machinery and equipment to theconstruction of new power infrastructure, equipment updating, and equipment refurbishing.

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NIP P ON KOEIPower & Digital Business Unit, Nippon Koei Co., Ltd. (Outline of Production Base)
Location
Land area
Buildings(total floor area)

Number of employees

1-22 Dokyu, Morijuku, Sukagawa-shi, Fukushima 962-8508, Japan
55,337 m²
1. Administrative Building / Steel frame, 2 stories, 4,469 m²(Design room, employee canteen, cafe terrace, lounge with lodging facilities)
2. Systems Building / Steel frame, 2 stories, 4,796 m²(Testing room, various test equipment, thermostatic chamber, house machines for maintenance)
3. Machine Building / Steel frame, 2 stories, 4,296 m²(Turning machines, turning centers, machine tools such as NC shaft lathes, 5-axis
processing machines)
4. Machine Building No. 2 / Steel frame, 2 stories, 488 m²
5. Ancillary Building / 1,215 m² (warehouse, pump room, garage, etc.)283(as of May 2018)

N I PPON KOE I

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OUR BUSINESS

From Fukushima to the World with the Latest Technology
A Global Company that Creates the Energy to Be Handed
Over to the Next Generation
In the face of increasing natural disasters caused by global warming and the Great East Japan Earthquake, the world's
energy composition has undergone a major change, and the need for safe and clean renewable energy that scarcely
emits greenhouse gases is rapidly rising.
At the same time, expectations for smart cities, smart houses, and other energy management systems that use energy
smartly and efficiently are increasing. These needs, far from being limited to Japan, have become an international need.
The Nippon Koei Power & Digital Business Unit has worked on numerous power infrastructure projects to efficiently
and stably supply renewable energy such as hydropower since its founding. As a front-runner that has grown against the
backdrop of such needs, we take pride in our mission to open up new business models in this field through the use oftechnology.
With "From Fukushima to the World with the Latest Technology" as our motto, we aim to further grow as a global
company and create the energy to be handed over to the next generation.

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NIP P ON KOEI

Upgrade, S&B

Modification, repair

Research

Hydropower
plantsSubstations

Planning

Construction

Operation, maintenance

Machinery, electricity, civil engineering works

EnergyDisasterprevention

DesignConstruction

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BUSINESS FIELD
From the Development of Machinery and Equipment for the Electric Power
Industry to Design, Manufacture, Construction, Maintenance, and Refurbishing
It is no exaggeration to say that the business fields of the Nippon Koei Power & Digital Business Unit encompass an entire city. Examples of what we do include the construction of dam management systems and the manufacture of related equipment to comprehensively
manage the discharge facilities of dams; the construction and refurbishment of substations, power plants, overhead and undergroundpower transmission equipment; and the construction of central control systems for the efficient monitoring and control of power systems.
Further, in recent years, our business has grown to include also various aspects related to the electric power industry, such as the utilization of renewable energy, demand for which is rising, and to respond to the various needs in that field.

Hydropower plant

Dam

ControlSupervisory control
system for dam

Multiple dams are connected to a
network to realize monitoring andcontrol from a base.

Control

Control systems
Water turbines
Production of highly efficient water
turbines made to suit thecharacteristics of the site. Over240 units delivered.

Custom-made control systems
suitable for turbine/generator
specifications and operation
methods.

Generators
Production of high-efficiency,
high-performance generators.
Over 170 units delivered.

Disaster prevention
Dam

Rockfall detection system/
Cut slope detection system
Maximum monitoring length of
4,000 m for rockfall and 200 m to
300 m for landslides.

Dam discharge alarm system
Hydropower plant

Substations

Transmission substation(auxiliary equipment of transformers)

Landslide detection system

Conservators

Rockfall detection system

Over 20,000 units
delivered.

Distribution substation

Underground substation

Central control station
Underground substation

On-lineoil filters

Oilless
breathers

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NIP P ON KOEI

For preventing thedeterioration of insulating
oil used for tap changers
of transformers.

Moisture-absorbent breathers
that do not
require sealing oil.

Cooling towers

By adopting a closed type, we
overcame the disadvantage ofcomplicated maintenance in open
types.

Solar power plant

Substation (monitoring and control system)

CONTENTS
Hydropower plants
08
09
10
11
12
13
14
15
16
17
18

Interface panels
Low-cost metal type,space-saving optical type,
and IP type.

Francis turbines
Pelton turbines
Cross-flow turbines
Propeller turbines
Screw turbines
Synchronous generators
Stators / Rotators / Induction generators
Integrated protection and control system
Exciters (Static-exciter, Brushless)Governors (hydraulic, electric, hybrid)
Digital test system for hydro power stations

Substations

Remote monitoring
and control system

For collecting substation
information and coordinating witha central monitoring system.

Compact monitoring
control panels

Optimum design according to thescale of the transmission substation.

20
21
22
23
24
25

Control station

27

Centralized monitoring
and control system

29

For centralized monitoring ofmultiple unmanned substations.

30
31
32
33
34

Conservators (A, AP, B)
Rubber cells for conservators / Gas detectors
On-line oil filters
Oilless breathers (OLN Type, OLV Type) / Silica gel
breathers (DH-B Type)
Closed cooling towers
Compact monitoring control panels / Remote monitoring
and control system for transmission substations(Unit-divided type) / Interface panels
Compact monitoring control panels (Fiber optics) /Remote monitoring and control system for transmission
substations (Fiber optics) / Interface panels (Fiber optics)
Parallel synchronizer equipment (M3 type) / Interface
panels for 500kV
Interface panels (IP)Remote monitoring and control system for distribution
substations (Multifunctional)
Transfer interrupting device
Centralized supervisory control system
Communication equipment gateway

Dam-related products
36 Supervisory control system for dam
37 Dam discharge alarm equipment
38 Automatic gate control equipment

Energy management system / Renewable energy
40
41
42
43

Renewable energy

Demand-side energy management system (EMS)
Storage battery control system
Renewable energy monitoring service
Hybrid street lights

Disaster prevention
45 Rockfall detection system / Cut slope detection system
46 Embankment slope collapse detection system / Automatic ash rain gauge
47 Crack gauge (measurement)

Hybrid street lights
Street lights that accumulate
electricity generated by wind
power and sunlight in astorage cell, and automatically turn on and off.

Solar power generation
monitoring service
Cloud service that centrally monitors
multiple power plants.

Other
49 Mold line traps
50 Safety tools (Special high pressure Voltage detector /Electrical insulation hook bar / Grounded metal / Special
high pressure earthing device)
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Hydropower plants
Since the company was established in 1946, it has been engaged in numerous projects including theconstruction of hydropower plants, the renewal of facilities and the refurbishment of equipment in Japanand overseas. We are currently involved in operation and generation of power in about 150 sites in the
country. Going forward, we will continue to provide comprehensive technological solutions and services
tailored to the hydropower generation life cycle based on our expertise and experience.
Francis turbines

１０００

PeltonPelton turbines

Fall［m］

W
W
kW
0k
0k
00
,00
5,0
10

Cross-flow turbines,00
20

Francis１００

Cross-flow
３０

１０

W

０.１

W
0k
50

W

k
50

Siphon
１
０.０１

k
00
1,0

Propeller
Screw

１０

１

Flow［m3/sec］

Propeller turbines
Siphon turbines

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NIP P ON KOEI

Screw turbinesHydropower plants
Substations
Dam-related products

Francis turbines
Energy management system /Renewable energy

Francis turbines with the world classhigh efficiency[Features]● Suitable for a wide range of head and flow rates to suit a broad range of
specific speeds● Highly efficient turbines designed using computational fluid dynamics(CFD) analysis technology and model testing[Specifications]
Effective head

Flow rate

Up to 12,180 kW

Up to 236.2 m

Up to 23 m3/s

Horizontal Francis turbine

Disaster prevention

OutputOther

Vertical Francis turbine

Francis runner

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8Hydropower plants
Substations
Dam-related products

Pelton turbines
Energy management system /Renewable energy

Compactness that contributes to the
reduction of construction costs[Features]● Effective for power generation at high-head sites where there is little
variation in head
● In vertical-shaft designs for small-scale hydropower generation, directly
installing the generator in the housing of the turbine makes it possible toreduce the construction costs of the power plant building and to make theequipment compact

Disaster prevention[Specifications]
OutputEffective head

Flow rate

Up to 1,530 kW

Up to 372 m

Up to 1.12 m3/s

Pelton runner

Other
Vertical Pelton turbine being assembled at a factory

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NIP P ON KOEI

Nozzle for Pelton turbineHydropower plants
Substations
Dam-related products

Cross-flow turbines
Energy management system /Renewable energy

Demonstrating high efficiency acrossa wide range of loads and offering
excellent maintainability[Features]● Effective for power generation at medium-head sites where there isrelatively little capacity● By dividing the guide vane into two in the axial direction, high efficiency isachieved over a wide range of loads● Simple structure allows easier maintenance than other water turbines

OutputEffective head

Flow rate

Up to 565 kW

Up to 25.34 m

Up to 3.5 m3/s

Disaster prevention[Specifications]

Cross-flow turbines

Other

Cross-flow runner

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Hydropower plants
Substations
Dam-related products

Propeller turbines
Energy management system /Renewable energy

Effective for power generation at lowhead sites and highly suitable forvariable flow systems[Features]● Effective for power generation at low-head sites● Highly efficient in variable flow rate systems by changing the runner
vane angle[Specifications]

Disaster prevention

OutputEffective head

Flow rate

Up to 1,300 kW

Up to 11.6 m

Up to 13.9 m3/s

Other
S-type turbines

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NIP P ON KOEI

Runner of s-type turbineHydropower plants
Substations
Dam-related products

Screw turbines
Energy management system /Renewable energy

Low-cost, environmentally friendly
turbines that can be installed in weirs
and irrigation canals

Power generator
Step-up gear

[Features]● Suitable at low-head sites with a low flow rate
● Simple structure reduces installation and maintenance costs● No need for large-scale headrace or penstock, resulting in a low
construction cost

Screw turbine[Specifications]
Effective head

Flow rate

Up to 34.8 kW

Up to 3.1 m

Up to 1.5 m3/s

Schematic diagram ofa screw turbine

Disaster prevention

OutputImplementation of demonstration tests to assess environmental impact"Kotaka Hydropower Station" (Satsumasendai City in Kagoshima Prefecture)

Other

As few screw turbines have been introduced in Japan, there are uncertainties about
their efficiency characteristics, environmental impact, and so on. In collaboration
with Satsumasendai City, we built a small hydropower plant that uses an intake weir
for agriculture as a subsidized project. Various demonstration experiments are being
conducted to test the efficiency of the turbine generator, the cost-saving effect of nothaving to use civil engineering construction equipment, the influence on the downstream
flow of debris, the impact on fish, and noise control, among other things, with the aim
to disseminate the use of environmentally friendly hydropower generation using screw
turbines.

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Hydropower plants
Substations
Dam-related products

Synchronous generators
Energy management system /Renewable energy

Compact, high-performance generators with excellent maintainability

Disaster prevention[Features]● The horizontal (shaft) generators are compact in size and reduce
auxiliary equipment through the use of two bearings, which reduces theneed for flywheels through generator design that withstands runaway
speed, and by adopting air cooling for the bearings● Oil-less design due to the use of electromagnetic brakes andimproved maintainability due to the use of AC exciters● In the case of vertical-shaft generators, the maintainability of the areaaround the lower bracket and brakes has been improved through theacquisition of a patent for the provision of electromagnetic brakes at the
top as well as the reduction of auxiliary equipment

Vertical synchronous generator[Specifications]

Other
Horizontal synchronous generator

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NIP P ON KOEI

OutputVoltageUp to 20,000 kW

Up to 13.2 kVHydropower plants

Stators

Rotators

Substations[Features]● The rotator can be designed for high strength against centrifugal
force according to the design that withstands runaway speed● On-site incorporation of salient poles possible● Compact design with a cylindrical rotator also possible

Dam-related products[Features]● Design that stacks low-loss electrical steel sheets and impregnates
insulated stator coils with epoxy resin● Although a stator coil commonly has a two-layer winding, it ispossible to halve the number of coils through a single-layer winding● Sufficient insulation strength against high voltage (3.3 kV to 13.2 kV)● On-site coil rewinding possible

Induction generators
Energy management system /Renewable energy

Compact generators that meet the requirement for lower prices[Features]● Use of an induction generator makes it possible to eliminate the need for
exciters, reducing the cost of power generation equipment as well as theconstruction cost
● Compact and lightweight design through the use of ball bearings

Disaster prevention

Vertical induction generator

Other

Horizontal induction generator

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Hydropower plants
Substations
Dam-related products

Integrated protection and control system
Energy management system /Renewable energy

Control systems that are custom-madeaccording to the intended application[Application]● Performing a series of operations and fault monitoring, from turbine generator
startup to parallel operation, load regulation, and machinery protection

Disaster prevention[Features]● The systems for the main functions at hydropower plants, namely automaticsequence, speed control function, excitation function, protection function,communication function, are implemented with a PLC● Highly reliable systems that can be designed according to the desired
application and offer excellent operability and maintainability● Can be expanded to include remote monitoring and control applications suchas intake gate control and measurement*PLC: Programmable Logic Controller

Integrated protection and control system
Exciter / Governor

Monitoring / Operation

External dimensions

800 mm (W) × 2,300 mm (H) × 800 mm (D)Equipment
configuration

Freestanding with front and rear maintenance accessControl power supply

110 VDC (88 VDC to 143 VDC)

Protection functions
Auxiliary panel

Exciters / Governors / power plant / Turbine controls / Remotemonitoring control system, etc.

Secondary adjustment
functions

Water level adjustment, groyne control, autonomous recovery, flow
control, etc.

*External dimensions may be modified according to specifications

NIP P ON KOEIGOV function

Water level adjustment
sequence/AQR
Telecontrol slave station

GOV actuator

Water turbine

Switches, touch panel
Water turbine generator protection / Transmission line protection /Transformer protection

AVR function

Power generator

Other

Operation method

Protection

Monitoring / Operation

PLC[Specifications]15

Touch panel screen*AVR: Exciter *GOV: Governor

Protection circuitHydropower plants

Exciters (Static-exciter, Brushless)Can be designed according to
the characteristics of the generator[Features]● Can be designed according to the characteristics of the generator● High responsiveness and stability during load fluctuations and accidents throughthyristor control● Appropriate allocation of reactive power when generators are operating in parallelwith other generators● Supports both static and brushless excitation

Dam-related products

Conceptual diagrams of exciters
Bus

Power generator

Staticexciter

Circuitbreaker (CB)

Substations[Application]● Maintaining the voltage during steady operation of the synchronous generator ata constant level, maintaining the voltage during load fluctuations, and adjusting thereactive power to improve the dynamic stability

Water turbine

Energy management system /Renewable energyBusAC exciter
Water turbine

Brushlessexciter

Circuitbreaker (CB)Power generator

800 mm (W) × 2,300 mm (H) × 1,100 mm (D)Equipment configuration

Freestanding with front and rear maintenance accessControl power supply

110 VDC (88 VDC to 143 VDC)

Operation method

Switches, touch panel

Rectification method

Single-phase/three-phase bridge

Maximum output current

30 A to 500 A

Functions

APFR, AQR, limiter functions, etc.

Other

External dimensions

Disaster prevention[Specifications]*External dimensions may be modified according to specifications

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Hydropower plants

Governors (hydraulic, electric, hybrid)
High-performance governors thatare optimally designed to meet
specific needs

Substations[Application]● Adjusting the flow rate to the water turbine, controlling therotation speed and adjusting the output[Features]● Available in three types to cover various customer needs● Highly stable generator frequency (turbine speed) control throughload variation

Dam-related products[Features of hybrid type]● Control of hydraulic cylinder with hydraulic pump driven by motor
power● Low chance of oil leakage as the hydraulic circuit is contained
inside the unit
● Highly customizable installation as the pump part and the cylinderpart are separate structures● A large operating force can be obtained with a small cylinder

Hybrid governor[Features of electric-powered type]● Control of cylinder with gears driven by motor power● Contribution to oil-less operation in power plants

Energy management system /Renewable energy[Features of hydraulic type]● Converts electric signals to mechanical motion and performs
servo motor control through hydraulics● Can be employed for large-capacity turbines

Electric-powered governor[Specifications]

Disaster prevention

Operation method

Other

Hydraulic governor

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NIP P ON KOEI

Hybrid type

Electric-powered
type

Hydraulic type

Electrical,
hydraulicElectricalHydraulic

Applicable class

Y class / Z class

Dead band

0.1% (Y class)Dead time

0.3 s or less (Y class)

Rotation speed
adjustment range

90% to 108% (Y class)

Speed droop adjustment
range

2% to 6% (Y class)

Rotational speed
detection method

PMG / SSG

Control method

PID control

Applicable turbine

Francis, Pelton, and others

Hydropower plants

Digital test system for hydro power stations
Highly efficient systems
that automatically process
measurement, computation, andsorting of records[Examples of measurement items]● Load rejection test
● Turbine efficiency test by pressure-time method● Turbine efficiency test by ultrasound method● Output opening test
● Closing test without water

Dam-related products[Features]● Connects water level sensors, pressure sensors, and othersimilar devices to various equipment such as hydraulic turbines,
generators, tanks, penstock, and so on; improves work efficiency
by measuring, computing, and sorting records with a computer● Records changes over time of turbine generators through aperiodic implementation of measurement tests● Less measurement errors by measurers due to computerized
sorting of records

Substations[Application]● Connecting sensors to various equipment for each measurement
test in a hydropower station and automatically processing eachmeasured value with a computer

Energy management system /Renewable energy
Other

Sample load rejection test results (2)Disaster prevention

Sample load rejection test results (1)Sample efficiency test results

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Substations
Nippon Koei has been dealing with a wide range of operations—from delivery of monitoring and control
systems that ensure the safe and efficient operation of substations, which are critical for electrical powertransmission, as well as various ancillary systems and transformer-related equipment, to provision ofmaintenance services. Going forward, we will continue to do our utmost to respond to all kinds of needs
related to substation equipment.

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NIP P ON KOEI

Hydropower plants

Conservators
High-quality conservators with a delivery record of over 20,000 units[Features]● Used in many transmission and distribution transformers,
reactors, etc● Broad lineup of conservators to meet diverse needs (A, AP, and B)● Capacity ranging from 60 liters to 10,000 liters or more

Substations[Application]● The conservator has an oil-resistant rubber cell inside thetank to isolate the oil surface from the atmosphere, thereby
suppressing oxidation and moisture absorption of the insulating
oil used in the oil-filled electrical equipment, and controllingthe expansion and contraction of the oil due to changes intemperature

Type A conservators[Structural drawings]
Gas detector
Air vent flange

Breather connection flange

Rubber cell
Float

Air

Dam-related products

Transformer oil[Features]● The shape of the tank is either elliptical or a flat hexagon● Capacity ranging from 200 liters to 10,000 liters or more

Transformer connection flange

Oil discharge flange

Oil level dial gauge

Type AP conservators[Structural drawings]

Energy management system /Renewable energy

Air vent flange

Breather connection flange
Float

Rubber cell

Air

Transformer oil[Features]● The shape of the tank is cylindrical● Capacity ranging from 125 liters to 10,000 liters or more
● Low-cost version of type A

Transformer connection flange

Oil discharge flange

Oil level dial gauge

Disaster prevention

Type B conservators[Structural drawings]
Rubber cell abnormal expansion alarm device(not included in the BS model)
Rubber cell air vent flange

Rubber cell

Breather connection flange
Float

Oil level dial gauge

Air
Transformer oil

Pressure balancing oil

Transformer connection flange

Oil discharge flange

N I PPON KOE I

Other[Features]● The shape of the tank is rectangular● Capacity ranging from 60 liters to 5,000 liters● Transportable while fully assembled

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Hydropower plants

Rubber cells for conservators
Highly durable rubber cells with adelivery record of over 20,000 units[Applications]● Rubber cells are installed inside conservators, isolating the oilfrom the atmosphere and protecting the oil-immersed electricalequipment● Preventing the deterioration of insulating oil

Substations[Features]● Rubber cells made from materials that have excellent oil
resistance, flexing resistance, and gas barrier properties● Expected service life of 20 years owing to our special
manufacturing process● More than 20,000 rubber cells delivered for use in 275 kV classor higher power generation systems over the past 40 years● Rubber cells vulcanized by the Rotocure method, which
minimizes elution of sulfur into insulating oil, thereby maintaining
the characteristics of the insulating oil● Capacity ranging from 10 liters to 10,000 liters or more

Dam-related products[Rubber sheet nomenclature and specifications]
Designation

1.1Dr

Structure

3-layer

Material

Special nitrile rubber

Bag-manufacturing method

Vulcanized bonding

Thickness

1.1 mmTensile strength

250 N/cm or more

Stretchability

20% or more

Tearing strength

9.8 N or more

Gas permeability

72 (cm3)/(m2•24h•atm)

Energy management system /Renewable energy

Cold resistance-36°C

Heat resistance+100°CGas detectors
High-performance devices that
instantly detect residual gas

Disaster prevention[Application]● Detecting residual gases produced inside the conservatorand the transformer due to factors such as the destructionof the rubber cell of the conservator, internal failure of thetransformer, and intake from negative pressure areas[Features]● Residual gas can be sampled easily with a degassing valve● The amount of residual gas can be confirmed with a scale (ml)● Malfunctions caused by earthquakes are prevented with amicroswitch[Specifications]

Other

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NIP P ON KOEI

Model

GD-2A

Operating value

450 ±50 ml

Contact rating

125 VAC, 250 V - 5 A
125 VDC - 0.5 A
150 VDC - 0.25 A

Weight5.1 kgHydropower plants

On-line oil filters
High-quality on-line oil filter with adelivery record of over 5,300 units[Application]● Preventing deterioration of insulating oil used for tap changers oftransformers by removing carbon and moisture in the oil generated
by tap changing

VA
Filter materialP

Dam-related products[Structural drawing]

Substations[Features]● Models: NK-10JC, NK-10JD● Types of filter material: Laminated type and cartridge type
● Capable of capturing up to 400 g of carbon and 200 ml of moisture● Excellent capture ability with 0.02 μm filtration accuracy● Economical as can be used without a heater from an oil temperatureof 0°C● Automatic operation in 15-minute increments during periods offrequent tap changes● Piping inside the unit is organized in blocks as a measure against oilleakage● Over 5,300 units delivered

VR

F

GP
M

V
V

Oil inlet

V
FS

S

Energy management system /Renewable energy

Oil outlet

Oil outlet

V

Oil inlet

FS[Specifications]

Cartridge type
Filter material

Power supply

3-phase - 50 Hz/60 Hz - 200 V (400 V)

Electric motor

0.2 kW

Filter material

Laminated type: φ300 × 40 t × 5 sheets
Cartridge type: φ290 × φ50 × 324 H

Filtration flowrate

10 L/min

Filtration
accuracy

0.02 μm or more

Filtration
capability

400 g of carbon, 200 ml of moisture

Filtrationpressure

0.03 MPa to 0.3 MPa

Pressure
resistance

0.6 MPa

External
dimensions

850 mm (H) × 960 mm (W) × 650 mm (D)Weight210 kgN I PPON KOE I

OtherNK-10JC / NK-10JD

Disaster prevention

Laminated type

Model

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Hydropower plants

Oilless breathers (OLN Type, OLV Type)
Moisture-absorbent breathers that do
not require sealing oil and are easy tomaintain[Structural drawing]

Substations[Specifications]Dam-related products[Application]● Preventing moisture absorption of power substation transformers andinsulating oil tanks[Features]● Check valve with a sealing function, eliminating worries about
peripheral device contamination● Check valve with one-touch fittings for easy maintenance● Maximum breathing rate of 350 L/min● Allows direct pressure application (0.05 MPa) to the breather during
operation of the air seal of the conservator and testing the oil tightnessof transformers and other equipment● Easy-to-replace desiccant

Model

Desiccantcapacity

OLN-1kTransformer application example
Transformer rating

Transformer oil content

1 kg

Up to approx. 4 MVA

Up to 8,000 L

OLN-2k2 kg

Up to approx. 20 MVA

Up to 13,000 L

OLV-4K

4 kg

Up to approx. 50 MVA

Up to 26,000 L

OLV-8K

8 kg

Up to approx. 150 MVA

Up to 55,000 L

OLV-16K

16 kg

Up to approx. 750 MVA

Up to 120,000 L*Desiccant is not included and must be provided separately.

Energy management system /Renewable energy

Silica gel breathers (DH-B Type)
Dehydrating breathers that allow
easy desiccant replacement and offer
excellent maintainability[Structural drawing]

Disaster prevention[Specifications][Application]● Preventing moisture absorption of power substation transformers
and insulating oil tanks

Other[Features]● Structure with separate inlet and outlet so that air passes throughthe desiccant only during intake● Easy desiccant replacement without having to detach the breather
unit owing to separate desiccant input and output ports

Model

Desiccantcapacity

Weight(including
desiccant)Marginal
breathing rate

Transformer oil
content

DH-B1000

1 kg

4.2 kg22 L/minUp to 8,000 L

DH-B2000

2 kg

6.0 kg22 L/minUp to 16,000 L

DH-B4000

4 kg

10.0 kg

30 L/minUp to 31,000 L

DH-B6000

6 kg

15.0 kg

30 L/minUp to 46,000 L

DH-B13000

13 kg

25.0 kg

30 L/minUp to 100,000 L*Desiccant is not included and must be provided separately.

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Hydropower plants

Closed cooling towers
Cooling towers that offer high reliability,
long life, and labor cost savings

Discharge air
HR=85~90%
Axial fan[Application]● Cooling of insulating oil of oil-immersed electrical equipment inunderground substations

Moist air
HR=100%Eliminator
Sprinklers

Wet cooler

Circulating wateroutlet (cold water)

Outside air

Dam-related products

Water tankP
Sprinkler pump

NKTD-980 PF

Energy management system /Renewable energy

NKTD-1500 PF

Dry cooler

Substations[Features]● Greatly reduced corrosion, scaling and slime through the noncontamination of the circulating water by contaminated air or its
concentration caused by evaporation, since the circulating water does notcome into direct contact with the atmosphere; allows the entire coolingsystem to be more reliable and easier to maintain, with longer service lifeand labor cost savings● Air-cooled operation (over 35% at 18°C) is possible owing to an aircooling section (15% or more), resulting in water savings that are notpossible with an open type● White smoke suppression function● Can be made to order to satisfy diverse specifications, making themapplicable to urban substations to which restrictive conditions with regard
to installation area, shape, and noise apply

Circulating water
inlet (hot water)

NKTD-680 PF[Examples of Closed cooling tower specifications]
Model

Item
Operating condition

NKTD-1500 PF

NKTD-980 PF

Wet operation

Air-cooled
operation

NKTD-680 PF

Wet operation

Air-cooled
operation

Wet operation

Air-cooled
operation

(kW)

1,500

525

980

343

680

160*

(%)

15 or more–

15 or more

–

–

–

Water temperature at circulating water inlet

(°C)

48.5

42.0

55.0

48.5

57.5

50.2

Water temperature at circulating water outlet

(°C)

38.5

38.5

45.0

45.0

48.0

48.0

Wet-bulb temperature of outside air

(°C)

27.0

–

27.0

–

27.0

–

Dry-bulb temperature of outside air

(mAq)

–

18.0

–

18.0

–

18.0

Circulating water rate

(L/min)

2,150

1,425

1,040

Circulating water pressure loss(kPa)

60 or less70 or less70 or less

Design pressure

(MPa)

0.33

0.50

0.51

Noise
(Average value 2 m from tower side)(dB(A))

67 or less53 or less65 or less
1,720 × 2,100 × 4,284

Dimensions (W × L × H)

(mm)

3,000 × 4,000 × 6,075

3,300 × 3,400 × 6,883

Approx. product weight(kg)

15,50012,3004,500

Approx. operating weight(kg)

19,50014,8006,000

7.4 kW × 2 units

7.4 kW × 1 unit

5.0 kW × 1 unit

3.7 kW × 1 unit

1.5 kW × 1 unit

1.5 kW × 1 unit

Electric heater–

5.0 kW × 1 unit–

N I PPON KOE I

OtherBlowerSprinkler pump

Disaster prevention

Cooling capacity
Ratio of dry to wet cooling24Hydropower plants
Substations
Dam-related productsCompact monitoring control panels
Energy management system /Renewable energy

Low-cost, highly reliable metal panels[Application]● Performing direct operation of a substation on behalf of thehost system during maintenance of the remote monitoring
control system

Disaster prevention

Substation
centralized monitoring and control system

Substation
Remote monitoring andcontrol system

Compact monitoring
and control panel[Features]● The hardware implementation of the circuits results in a simple and highly
reliable design that allows flexible control panel replacement● Inter-device communication implemented as electrical signals via metal cables[Specifications]
External dimensions*

1,400 mm (W) × 2,410 mm (H) × 600 mm (D)Equipment configuration

Freestanding with front and rear maintenance accessControl
power
supplyInstallation
capacity

Interface panel

Other

Protective relay panel

Local equipment

Input voltage

110 VDC (88 VDC to 143 VDC)

Consumption
current

3.0 A or less

Grid block

Up to 21 columns × 3 rows

Fault indicator

Up to 24 columns (15 points) × 1 row / 24 columns (20 points) ×
1 row

TM indicator

Up to 7 columns × 2 rows

Operation switches

Master control switch / Alarm stop / Flicker stop /Display reset / Meter reset / Lamp test

Alarm function

Electronic buzzer

Alarm output

2 elements (power failure and multiple selection)

WeightApprox. 600 kg*The width of the monitoring control panel can be changed according to the installation capacity.

25

NIP P ON KOEI

A system of low-cost metal panels with alarge installation capacity

Hydropower plants

Remote monitoring and control system for transmission substations (Unit-divided type)[Application]● Relay of control commands from the host system, as well as measurement anddisplay information from interface panels

Substations[Features]● Linked to the host system via HDLC transmission protocol● Installation capacity customizable according to the size of the substation[Specifications]
External dimensions

700 mm (W) × 2,410 mm (H) × 500 mm (D)Equipment configuration

Freestanding with front and rear maintenance access

Equipment configuration

Logic rack: 1 unit / Terminal rack: Up to 6 units

Control power
supplyControl
outputMeasurement
input
Transmission
method(to host
system)110 VDC (88 VDC to 143 VDC)

Consumption current

10.0 A or less (L2000 actual measurement: 2.0 A or less)Rating110 VDC, 5 A (during current application)

Installation capacity

Up to 800 points

Rating110 VDC, 5 mA to 50 mA, photocoupler insulation

Installation capacity

Up to 2,000 points

Rating0 DC to 1 mA

Installation capacity

Up to 120 points

Transmission method

HDLC (ABM) protocol

Transmission speed

2,400 bps / 4,800 bps

Transmission lines

4-wire 2-route / 4-wire 1-routeDam-related products

Display input

Input voltage

Low-cost metal panels that allow circuit
mounting according to the equipment[Application]● Importing of equipment monitoring and measurement information, control
output, status and fault display contact amplification and relay[Features]● Can be easily maintained as they are internally divided into equipment units
and circuits of multiple equipment can be mounted on a single interface panel● Can provide interlock functions for safe operation of equipment

Energy management system /Renewable energy

Interface panels[Specifications]
700 mm (W) × 2,410 mm (H) × 600 mm (D)Freestanding with front and rear maintenance access

Application equipment

Power transmission lines / Bus bars and bus ties / Bus
sections / Main transformer primary / Main transformer
secondary / Main transformer tertiary, phase modifier /22 kV miniclad / Synchronized, common

Control power
supplyInput voltage

1.5 A or lessRatingEquipment-related: 110 VDC, 10 A (during current
application)
Other: 110 VDC, 1 A (during current application)

Control output
Display input

Measurement

110 VDC (88 VDC to 143 VDC)

Consumption current

Rating110 VDC

Rated line-to-line
voltage

110 VAC, 220 VAC

Rated phase voltage

110 VAC/√3

Rated current

1 A, 5 A

Rated frequency

50 Hz

Rated power factor

1

Tap position

Contact resistance type / selsyn type

Weight

VT: 0.2 VA or less (1 phase) / CT: 0.5 VA or less (1 phase)
Direct interlock / Indirect interlock
Approx. 400 kg or less (depends on equipment
configuration and installations)N I PPON KOE I

26

Other

Load
Interlock circuit

Disaster prevention

External dimensions
Equipment configuration

Hydropower plants

Compact monitoring control panels (Fiber optics)

Substations

Optical transmission-type panels that
dispense with the use of cables[Application]● Performing direct operation of a substation on behalf of the host system
during maintenance of the remote monitoring and control system

Dam-related products[Features]● Space-saving owing to a front-maintenance design that eliminates
the requirement of maintenance space on the back side, thus providing
a high degree of freedom of placement, such as installation on walls● Inter-device connection via fiber optic cables that offers great
resistance to lightning surges and equipment switching surges, andreduces cabling work

Energy management system /Renewable energy[Specifications]
External dimensions

700 mm (W) × 2,410 mm (H) × 600 mm (D)Equipment configuration

Control power
supplyDisaster prevention

Installation
capacity

1,400 mm (W) × 2,410 mm (H) × 600 mm (D)Freestanding with front maintenance access

Input voltage

110 VDC (88 VDC to 143 VDC)

Consumption current

6.5 A or less

6.5 A or less

6.5 A or less

Grid block

9 columns × 3 rows

14 columns × 3 rows

20 columns × 3 rows

Fault indicator

Up to 10 columns (15 points) × 1 row / 10columns (20 points) × 1 row

Up to 16 columns (15 points) × 1 row / 16columns (20 points) × 1 row

Up to 24 columns (15 points) × 1 row / 24columns (20 points) × 1 row

TM indicator

4 columns × 2 rows

6 columns × 2 rows

8 columns × 2 rows

Number of interface
channels*

Up to 10 channels/unit

Up to 23 channels/unit

Up to 32 channels/unit

Operation switches

Master control switch / Alarm stop / Flicker stop / Display reset / Meter reset

Alarm function

Electronic buzzer

Alarm output

5 elements (KC board fault, IF board fault, KC degeneration, remote selection, multiple selection)

43R contact amplification

No-voltage contact (10 contact points: remote/direct)

Other

WeightApprox. 350 kg/unit*Number of implemented channels expandable to total for 4 units

27

1,050 mm (W) × 2,410 mm (H) × 600 mm (D)NIP P ON KOEI

Approx. 500 kg/unit

Approx. 650 kg/unit

Optical transmission-type panels that save space

Hydropower plants

Remote monitoring and control system for transmission substations (Fiber optics)[Application]● Relay of control commands from the host system, as well as measurement and display
information from interface panels

Substations[Features]● Linked to the host system via HDLC transmission protocol● Installation capacity customizable according to the size of the substation[Specifications]
External dimensions

700 mm (W) × 2,410 mm (H) × 600 mm (D)Equipment configuration

Freestanding with front maintenance access

Equipment configuration
Control power
supplyInstallation
capacity

110 VDC (88 VDC to 143 VDC)

Consumption current

2.0 A or less/unit

Control items

Up to 800 points

Display items

Up to 2,000 points

Measurement items

Up to 120 points

Number of interface channels*

Up to 24 channels/unit

Transmission method

HDLC (ABM) protocol

CDT protocol

Transmission speed

2,400 bps / 4,800 bps

1,200 bps

Transmission lines

CH1: 4-wire 2-route / 4-wire 1-route4-wire 2-route / 4-wire CH2: 4-wire 2-route / 4-wire 1-route
1-routeCH3: 2-wire 2-route / 2-wire 1-routeCH4: 2-wire 2-route / 2-wire 1-route

WeightApprox. 310 kg/unit*Number of implemented channels expandable to total for 2 units

Dam-related products

Transmission
method(to host system)

Up to 2 units

Input voltage

Interface panels (Fiber optics)[Application]● Importing of equipment monitoring and measurement information, control output, status andfault display contact amplification and relay[Features]● Can be easily maintained as they are divided into equipment units● Can provide interlock functions for safe operation of equipment

Energy management system /Renewable energy

Optical transmission-type panels that allow
circuit mounting according to the equipment[Specifications]
External dimensions
Equipment configuration

Control power
supplyControl output

Display input

Measurement

Input voltage

700 mm (W) × 2,410 mm (H) ×
600 mm (D)Freestanding with front maintenance accessPower transmission lines / Busbars and bus ties / Sync

Category / Main transformer
primary, secondary / Maintransformer tertiary, phase modifier
Bus bar phase modifier / 22 kV
miniclad / Common

110 VDC (88 VDC to 143 VDC)

Consumption current

1.5 A or lessRatingEquipment-related: 110 VDC, 5 A (during current application)
Other: 110 VDC, 0.2 A (during current application)

Installation capacity
Rating
Installation capacity

Up to 20 points

Up to 60 points

110 VDC, 500 mA or less
Up to 80 points

Up to 150 points

Rated line-to-line voltage

110 VAC, 220 VAC

Rated phase voltage

110 VAC/√3

Rated current

1 A, 5 A

Rated frequency

50 Hz

Rated power factor

1

Tap position

Contact resistance type / selsyn type

Load

VT: 0.5 VA or less (1 phase) / CT: 0.2 VA or less (1 phase)

WeightDirect interlock / Indirect interlock
Approx. 250 kg

OtherInterlock circuit

Disaster prevention

Application equipment

350 mm (W) × 2,410 mm (H) ×
600 mm (D)Approx. 350 kg (22 kV miniclad:
450 kg)*Optional specifications:● A GIS direct operation mechanism can be installed.
● An FL information input function can be implemented.
● Customizable according to the arrangement or structure of the equipment room.

N I PPON KOE I

28

Hydropower plants

Parallel synchronizer equipment (M3 type)
Highly reliable system that reliably inputs synchronizing input operations[Application]● For installation on the control panel of a substation or switching station, for judging the occurrence of circuit breaker inputs from the voltage,phase, and frequency measurement results upon input of a circuit breaker input command, and for automatically outputting input commands

Substations[Features]● Parallel judgment function for "no-voltage two-system/single system", "loop," and "different system”● Telemeter external output with phase difference, frequency difference, and voltage difference● Parallel display of automatic inspection functions to ensure soundness of the detection/judgment function (non-operation
prevention function) and the continuous function for monitoring the inside and outside of the device (malfunction prevention function)● Has a function that allows setting of up to five tuning operations[Specifications]
External dimensions
Input voltage

Control power
supplyVT secondary

Phase difference
Detection
performanceDam-related productsFrequency
difference
Detection
performance
Voltage difference
Detection
performance

Input contact rating

Output contact
rating306 mm (W) × 310 mm (H) × 286 mm (D)110 VDC (88 VDC to 143 VDC)

Consumption current

0.36 A or less

Input

Single phase input, 2 elements (reference 1, subordinate 1)

Rated voltage

110 VAC / 63.5 VAC

Rated frequency

50 Hz / 60 Hz

Max. rated voltage

127% (for both 110 VAC and 63.5 VAC)

Accuracy±0.45 degrees

Measurement range±180.0 degrees

Detection period

50 Hz: 20 ms / 60 Hz: 16.67 Hz

Accuracy±0.01 Hz

Measurement range±5.00 Hz

Detection period

50 Hz: 20 ms / 60 Hz: 16.67 Hz

Accuracy±0.5% of rated voltage

Measurement range

0% to 127% of rated voltage

Voltage integrity
determination

80% to 120% of rated voltage

Detection period

50 Hz: 20 ms / 60 Hz: 16.67 Hz

Rated voltage

110 VDC (88 VDC to 143 VDC)

Number of inputs

7 elements (selection signal × 5, input signal × 1, spare × 1)

Rated voltage

110 VDC

Flowing current

1.0 A

Switching capacity

Resistance load: 0.3 A (cos θ ≈ 1) / Inductive load: 0.2 A (cos θ ≈ 0.4)

Output circuit
configuration

No-voltage contact, 5 elements (Input commands: 1a / Condition establishment: 1a / Operation
completion: 1a / System anomaly: 2a)Telemeter output

HDLC (optical, non-procedural) / Analog / CPU link

Weight12.0 kg

Energy management system /Renewable energy

Interface panels for 500kV
Uses an IP transmission protocol that allows linking with the host system[Application]● Importing of equipment monitoring and measurement information, control output, status and fault
display contact amplification and relay

Disaster prevention[Features]● Space-saving owing to a front-maintenance design that eliminates the requirement of maintenance space on the back side,
thus providing a high degree of freedom of placement, such as installation on walls● Can be easily maintained as they are divided into equipment units● Can provide interlock functions for safe operation of equipment● Use of an IP transmission protocol for data transmission with the host system● Change of system settings, maintenance work, status monitoring, and inspection work are all possible from a PC web browser[Specifications]
External dimensions
Equipment configuration

Application equipment

Control power supply
Control output

Input voltage
Consumption current
RatingOther

Installation capacity
Rating
Display input
Installation capacity
Line-to-line / Phase
voltage
Current
Measurement block
Frequency
Tap position
Load
Interlock circuit
Weight

350 mm (W) × 2,410 mm (H) ×
600 mm (D)Freestanding with front maintenance access
Bus ties / Main transformer primary / Maintransformer secondary /Transmission lines / Bus sections / Electric Main transformer tertiary, phase modifier / Unit
power station common
common /Substation common / Electric power stationcommon110 VDC (88 VDC to 143 VDC)
1.5 A or less
2.0 A or lessEquipment-related: 110 VDC, 5 A (during current application)
Other: 110 VDC, 0.2 A (during current application)
Up to 20 points
Up to 60 points
110 VDC, 500 mA or less
Up to 80 points
Up to 200 points
110 VAC / 63.5 VAC
1A/5A
50 Hz / 60 Hz
Contact resistance type / selsyn type
VT: 0.2 VA or less (1 phase) / CT: 0.5 VA or lessDirect interlock / Indirect interlock
Approx. 250 kg
Approx. 350 kg*Optional specifications: ● A GIS direct operation mechanism can be installed.
● Customizable according to the arrangement or structure of the equipment room.

29

NIP P ON KOEI

700 mm (W) × 2,410 mm (H) ×
600 mm (D)Hydropower plants

Interface panels (IP)Substations

System that cooperates withthe host system through an
IP transmission protocol andrealizes direct monitoring andcontrol via HMI[Application]● Relay of control commands from the host system and
HMI, as well as measurement and display information fromsubstation equipment

Description
External dimensions

700 mm (W) × 2,410 mm (H) × 600 mm (D)Equipment configuration

Freestanding with front and rear maintenance access

Application equipment

Power transmission lines / Bus bars and bus ties, A section and B section /Main transformer primary, secondary, tertiary, phase modifier / 22 kV miniclad / substation /Common

Control power supply

110 VDC (88 VDC to 143 VDC)
2.0 A or less/equipment unit

RatingControl output
Installation capacity
Rating
Display input

Installation capacity
Line-to-line / Phase
voltage

Measurement block

Disaster prevention

Input voltage
Consumption current

Energy management system /Renewable energy[Specifications]Dam-related products[Features]● Can be used for substations with a voltage class of 275 kV orless● Space-saving as it can support installation of up to four powertransmission lines● Can be easily maintained as they are internally divided into
equipment units● Use of an IP transmission protocol for data transmission withthe host system● Can provide interlock functions for safe operation ofequipment, with conditions configurable by the user
● Direct monitoring and control via HMI on a laptop is possible● Equipped with a synchronism detection function, allowing
reliable and safe introduction of circuit breakers (powertransmission lines, bus bars and bus ties, main transformer)

Equipment-related: 110 VDC, 5 A (during current application)
Other: 110 VDC, 0.2 A (during current application)
Up to 20 points (power transmission lines, sections, substation )Up to 50 points (main transformer, miniclad, common)
110 VDC, 500 mA or less
Up to 90 points (power transmission lines, sections, substation )Up to 180 points (main transformer, miniclad, common)
110 VAC / 63.5 VAC

Current*1

1A/5A

Frequency

50 Hz / 60 Hz

Tap position*1

Contact resistance type / selsyn type

Load

VT: 0.2 VA or less (1 phase) / CT: 0.5 VA or less (1 phase)
Soft interlock

WeightApprox. 350 kg

OtherInterlock circuit*1: Specified when the order is placed

N I PPON KOE I

30

Hydropower plants

Remote monitoring and control system for distribution substations (Multifunctional)
Multifunctional control system that
performs fault isolation and quick, safe
system restoration

Substations[Application]● Relay of control commands from the host system and HMI, as well as measurementand display information from substation equipment● Supporting fault isolation through an automatic switching function and quick, safe
system restoration in the event of accidents inside and outside of the substation

Dam-related products[Features]● Notification of control, display, and measurement information of substationequipment in coordination with the host system● Has two separate CPUs: one for remote monitoring and the other for direct
monitoring; when either of these becomes unusable, the other working CPU may be
used for monitoring and control● Direct monitoring and control via HMI on a laptop● Can provide interlock functions for safe operation of equipment, with conditions
configurable by the user[Specifications]
External dimensions

700 mm (W) × 2,300 mm (H) (1,910 mm (H)) × 800 mm (D)Equipment configuration

Freestanding with front and rear maintenance access

Substation configuration (type)2-line receiving substation / Multi-terminal unit substation

Energy management system /Renewable energy

Control power
supplyTransmission
methodControl output

Input voltage

110 VDC (88 VDC to 121 VDC)

Consumption current

2.0 A or lessTransmission method

HDLC (ABM) protocol

CDT protocol

Transmission speed

2,400 bps / 4,800 bps

200 bps / 1,200 bps

Transmission lines

4-wire 2-route / 4-wire
1-route6-wire 2-route / 6-wire 1-route4-wire 2-route / 4-wire 1-route2-wire 2-route / 2-wire 1-route

Rating110 VDC, 5 A (during current application)

Installation capacity

Up to 140 points

Rating110 VDC, 500 mA or less, photocoupler insulation

Installation capacity

Up to 310 points

Received current

2 channels, single-phase input, 1 A / 5 A

Display input

Disaster prevention

Measurement
input

Secondary current

3 channels, three-phase input, 1 A / 5 A

Secondary voltage

3 channels, single-phase input, 110 V, input range of 0 V to150 V

Secondary zerophase voltage

3 channels, single-phase input, 190V, input range of 0 V to260 V

Tap position

17 taps / 23 taps

Distribution line
current

8 channels × 3 banks, single-phase input, 0.1 A, input rangeof 0 V to 0.15 A

CT rating

1A/5A

Number of circuits

8 input circuits and 8 output circuits

RatingInput: 110 VDC
Output: 110 VDC / Duration: 1.0 s

Power receiving
protection
Inspection
timer

Weight2,300 mm (H): Approx. 460 kg / 1,910 mm (H): Approx. 390
kg

Other

*Optional specifications:● Change of aggregation destination of HDLC information to CDT information● Customization of the monitoring screen (skeleton screen) for direct monitoring and control● Equipment contact amplification for indirect interlocking of substation facilities

31

NIP P ON KOEI

Prevents power grid accidents from spreading
and supports coordination of distributed
power supply[Reclosing lock device application]● Outputting a reclosing lock signal to the transmission line protection relay so that
reclosing by the transmission line protection relay is not performed when a cable accident
is detected

Substations[Transfer interrupting device application]● Eliminating accidents by tripping the circuit breaker at the transmitting end when atransformer accident occurs at the unit distribution substation without a circuit breaker on
the primary side of the transformer

Hydropower plants

Transfer interrupting device[Single operation prevention device application]● Preventing single operation when the breaker of the electric company opens by tripping
the circuit breaker of the power generation operator when diverse distributed powersources such as wind and sunlight are connected to the power gridElectrocution caused by the power line

Continuation of powertransmission

Power generation company

Dam-related products

Substation

Fault

CutoffSubstation

Power generation company

Introduction of single operation prevention device

Fault

No voltage
CutoffDisconnection
signalCutoffTransmitting end

Receiving end

Transmitting end

Receiving end
Optical A route down

Optical B route down
Optical B route up

Cutoff output

Output section

Optical A route up

Logic section &Optical transmission section

Inspection
input*Up to 3-point input

Input
sectionCutoff input

Logic section &Optical transmission section

External circuit

InspectioncommandRY

RY

Energy management system /Renewable energy[Features]● Transfer interrupting device and reclosing lock devices, which are installed at an electric
power company's substation, support system protection in case of an accident● Single operation prevention devices can prevent single operation by installing thetransmitting end at an electric power company that operates and manages the distributed
power supply, and the receiving end at power companies that carry out system operation

Transfer trip
outputOperation complete[Specifications]
Reclosing lock device

Single operation prevention device

SC-511T-A

SC-511T-B

SC-511T-COG

350 mm (W) × 2,410 mm (H) (including the 110-mm name plate) × 450 mm (D)Equipment configuration
Control power supply

Transmission
specifications

Freestanding with front and rear maintenance access

Input voltage

110 VDC (93.5 VDC to 121 VDC; 88 V to 143 V is momentarily allowed)

Consumption current

1.0 A or less

Optical fiber specification

SM (single mode) optical fiber

Optical connector

SC connector

Transmission speed

128 kbps

Transmission line
configuration

2-route configuration

Transmission distanceTransmission time
Number of corresponding lines

Disaster prevention

External dimensions

Transfer interrupting device

20 km*1
50 ms or less

70 ms or less

50 ms or lessTransmitting end : Receiving end = 1 : 1 (per line)
Up to 2 lines
Intercept input: 3 points / Intercept output: 1 point

WeightTransmitter: Approx. 160 kg (2 lines installed) / Receiver: Approx. 165 kg (2 lines installed)

Other

Installation capacity
Number of input and output points*1: Transmission distance can be extended to 50 km as an option.

N I PPON KOE I

32

Hydropower plants

Centralized supervisory control system
Highly functional control system for centrally monitoring
multiple substation facilities

Substations[Features] (Standard TC interface system)● In addition to a redundant configuration using two mainequipment units (duplex system), high reliability is realized byextending redundancy to communication lines and the power
supply system● Can support communication with remote monitoring control
devices via CDT and HDLC conforming to power standards● Up to 75 TC* units can be connected● Can be connected to up to ten 2-tier control systems● Safe remote monitoring and operation of the whole system arerealized through central management of monitoring and control
information and working/testing information from various locations

Dam-related products[Features] (Facility status monitoring system)● System availability is realized with the use of ftServers (faulttolerant servers) for monitoring● A cost-effective and high-performance operating environment isrealized by adopting general-purpose Linux servers for providing
support functions● Flexibility in terms of installation location and terminal expansion
is achieved through the use of thin clients for the human machineinterface● Can perform remote monitoring of multiple substation facilities● Support functions for helping maintenance personnel create
local procedure charts

Grid control system

Load-dispatching station

Power supply system

IP network
ControlStandard TCIF device
stationFacility status monitoring(maintenance) system

System bus

System bus

TCDX

TCDX

… TCDX

TCDX（25TC）

Substation

TC

TC

CDT/
HDLC

CDT/
HDLC

…

TCDX

… TCDX

Power distribution
control system
System bus
TCDX

TC

TC

TC

CDT/
HDLC

CDT/
HDLC

CDT/
HDLC

…

TCDX

… TCDX（25TC）（25TC）
TC

TC

TC

CDT/
HDLC

CDT/
HDLC

CDT/
HDLC

…

TC
CDT/
HDLC

*TC: Telecontrol system (Remote monitoring and control system)[Main functions of the standard TCIF system]

Energy management system /Renewable energy

Function

Description

Control

The system implements functions for relaying selection control information between the host system and TC, functions for status management,
and functions for management and mutual exclusion of control authority of the host system in TC units.

Monitoring

The system implements functions for editing TC and TC line statuses as well as automatic status changes/response status changes from SV
and TM information received from TC, and notifying the host system accordingly.

Work in progress / Testing inprogress

The system implements functions for managing work-in-progress and testing-in-progress specification information for equipment andmeasurement items received from host systems, functions for transmitting information to all host systems, as well as functions for not
accepting selection and control information of specified devices during work.

SV and TM information editing

SV and TM information can be edited in TC units and periodically sent to the host system.

RequestThe system implements functions for relaying “request” information between the host system and TC, as well as functions for statusmanagement.

Testing

The system implements functions for sending and receiving various information to/from the host system as test data, by simulating monitoring
operation responses such as selection control.

System monitoring

The system implements functions that monitor the system for anomalies, and when they occur, display and record them and transmit thisinformation to the host system.

Data maintenance

The system implements functions to capture, distribute, and switch system data.

Disaster prevention[Main functions of the facility status monitoring (maintenance) system)
Function

Other

33

Description

Substation monitoring

The system implements functions for monitoring the status of substation equipment based on TC information, SV (monitoring), and TM(measurement) information received from standard TCIF devices.

Substation equipment statussetting

The system implements functions for status setting related to remotely-controlled device statuses, grounding states, work-in-progress
specifications, and testing-in-progress specifications, in conformity with the work status in the substation.

Information request

The system implements functions for requesting information held by TC and standard TCIF devices, displaying return information on thescreen, as well as recording and outputting information.

Recording

The system implements a function for editing the various measurement states of a substation every hour on the hour, operation takeover andrecord editing functions, a sampling recording function, and a direct control line transmission/reception recording function.

Procedure table creation support

The system implements functions that support the management of live parts verification diagrams, stop schedule information, and devicespecific operating procedure information received from the grid control system and power distribution control system.

Data maintenance

The system implements functions to import and switch system data, as well as functions to change power distribution line names.

System operation

The system implements functions that monitor the system for anomalies, and when they occur, display and record them and transmit thisinformation to the host system.

Messaging

The system implements functions for editing message information necessary for monitoring the status of substation equipment, outputting it toscreens and saving it, as well as searching edited messages.

Testing

The system implements functions for sending and receiving simulation information to/from standard TCIF devices or grid control systems as
test data.

NIP P ON KOEI

A system that absorbs and unifies
the differences among the various
communication protocols used by substationequipment, and performs protocol conversion
for collection and delivery to the host system

HostsystemNext-generation
systems (3 systems)

Conventional
systems (2 systems)[Function overview]• Protocol conversion between the substation systemand the host system• Compatible with nex t- ge ne ration syste ms a ndconventional systems (conventional systems connected tothe aggregation processing units of standard TCIF devices)

CDT/HDLC

Substation[System overview]• Composed of two main processing units to ensure
redundancy• CDT/HDLC transmission supported for up to 48
terminals*1• IP transmission supported for up to 96 terminals*1

Communicationequipment gateway
IP

Remote monitoring
and control
systemTransmission substation

IP

Remote monitoring
and control
systemIP

Interfacepanel

Distribution substation

Interface
panel

Disaster prevention

Distribution substationIP

CDT/HDLC

Remote monitoring
and control
systemEnergy management system /Renewable energy

IPControlstationTransmission substation[Specifications]
Communication protocol of substation equipment

IP transmission only

Rack configuration

1 basic rack

Maximum
number ofcorresponding
systems/units

IP transmission, CDT/HDLC transmission
1 basic rack, 1 expansion rack

1 basic rack, 2 expansion racks

External dimensions

700 mm (W) (1 side) × 2,300 mm (H) (excluding the 110-mm name plate and the 50-mm channel base) × 500 mm (D)Equipment configuration

Freestanding with front maintenance accessPower supply

100 VAC ±10%

External contact input

5 points (contact a)

Host system

Next-generation
system

6 corresponding systems (3 next-generation systems × 2 LAN systems)

Conventional system

4 corresponding systems (2 conventional systems × 2 LAN systems)

CDT/HDLC–IP

96 corresponding units*1

24 corresponding units*1

Interface panelIP

96 corresponding units*1

48 corresponding units*1

Other

Remote monitoring
and control system

HMI

Dam-related products[Features]● Composed of a basic rack that mounts the main processing unit (computer) andthe corresponding IP transmission unit, and an expansion rack that mounts thecorresponding CDT/HDLC transmission unit
● In addition to a redundant configuration using two main processing units (duplex
system), high reliability is realized by extending redundancy to communication lines
and the power supply system● The substation equipment supports remote monitoring control equipment (CDT/HDLC/IP) and the Interface panel (IP)● Data transmission with the host system is done via IP transmission, and data
ordering and redundancy are ensured through the application of industry-standard
communication protocols● Direct monitoring and control via HMI on a laptop is possible

Substations[Application]● Relay of control commands from the host system and HMI, as well as
display and measurement information from substation equipment

Hydropower plants

Communication equipment gateway

Laptop (Optional)*1: Up to 96 corresponding units in total for the remote monitoring and control system (CDT/HDLC/IP) and the interface panel (IP); however, the maximum number of physical connection ports between theinterface panel (IP) and the remote monitoring and control system (IP) is 40.

N I PPON KOE I

34

Dam-related products
We carry out system development, design, testing, delivery, and maintenance in an integrated manner tobest meet diverse needs for efficient power system monitoring and control, including Supervisory control
system for dam for comprehensively managing the discharge facilities of dams, and monitoring and control
systems for substations to ensure stable power supply.

35

NIP P ON KOEI

Hydropower plants

Supervisory control system for dam
Highly functional control system for centrally monitoring dam-related facilities
Control station

Monitoring and control• Central monitoring of
the status of local
equipment• Recording of handled
equipment information& measurement andcalculation information• Simplified form
creation throughautomatic quotation

Displays a list of
information through aspace-saving configurationof large dual monitors

Telephone
network

Server system

Discharge alarm
Wireless alarm system
Status can bemonitoredfrom adistance

Controls the gate
automatically or manually
through control signals
from the control station

Type B Dam

Energy management system /Renewable energy

Control screen

Dam-related products

Transmits the gate opening
level, dam water level, andequipment status to thecontrol station

Type A Dam

Water system chart / Status diagram screen

Fax transmission torelated locations andsurrounding facilities

Fax messages
can be easily
created and thentransmitted tointendedrecipients

Substations[Features]● In addition to a redundant configuration with the mainequipment and communication lines, a highly reliable system isrealized by extending redundancy to the power supply system● Dual-monitor PC achieves a good balance between spacesaving and information display capacity● Human error is prevented through user-friendly operation
methods, well-placed information, and guide functions● Safe and reliable control realized by incorporating malfunction
prevention measures and operation monitoring functions for gate
operation● Automatic control function for various types of dams andintakes● Strong security against third parties through measures that
include password authentication, vein scanning, and a screen
non-display function● Powerful support for reduction of users’ workload throughflexible collaboration with other systems, such as fax transmission
to intended recipients and discharge alarm control● Use of Excel to display forms ensures compatibility with users’
OA machines● Scalability allows smooth expansion to deal with increases in
the number of linked machines and amount of data sent/received

Forecast screen[Main functions]
Description

Monitoring

State monitoring function for the equipment that makes up the system, operation monitoring function for gate operation, control value
monitoring function for TM (measurement) data

Gate operation support

Calculator function to assist manual operation of gates (dam release volume increment calculation function, gate allocation calculation,gate discharge flow transfer calculation, etc.)

Automatic gate control

Fully automatic function for gate control according to existing conditions, including constant water level and water storage control

Data storage
Forms
Maintenance
Wireless alarm (optional)

Long-term storage of various types of data through the use of a database, as well as a data search function
Improved ease of editing forms and improved compatibility with users’ PCs by displaying tabulated data in Excel format
Flexible design allows users to freely set message display and alarm activation for equipment/quantity information handled by the system
The screen can be designed to match operations through provision of functions that allow users to freely customize the information
displayed on the screen
Allows status monitoring at locations away from the system through links with portable wireless alarm devices
Forecasts inflow volume by analogy with estimated rainfall acquired from weather data and past data

Fax message editing and sending(optional)

Allows easy composition of fax messages and delivery to their intended recipients

Coordination with discharge alarmsystem (optional)

Allows scheduled activation of discharge alarms

Other

Inflow volume prediction (optional)

Large-screen display system (optional)

Disaster prevention

Function

Enables the display of the data necessary for operation in list form and the status display for the entire water system for improved
monitoring and operation efficiency

N I PPON KOE I

36

Hydropower plants

Dam discharge alarm equipment
Instantaneously issues alarm commands tosirens and speakers at each alarm station[Application]● Issuance of alert sirens and announcements to the surrounding area before water
discharge to prevent accidents caused by dam discharges

Substations[Features]● Receives alarm commands from the alarm control system at the dam management
office, and activates the alarm of motor sirens and speakers in alert stations● Picks up motor siren and speaker outputs, determines the alarm volume, and notifies
the result to the alarm control system at the dam management office● Can work with up to four alert stations● Machine alarms can be activated from the system’s operation section or fromconnected external equipment such as an alert operation box

Dam-related products

Temporary dam management office
Alert station
Relay station

Alert station
Relay station

Dam notification line
(wired)Energy management system /Renewable energy

Audible range

Relay station

Dam discharge

Telecontrol communication line

Relay station

Alert station

Relay station
Permanent dam management office[Specifications]

Disaster prevention

External dimensions
Equipment configuration

Outdoor specifications (Freestanding with front maintenance access)

Alarm activation system

Remote commands, machine commands (system’s operation section, alert operation box)

Relay station configuration

Up to 30 relay stations/control stations

Alert stations
Control power supply

Transmission
specifications

Up to 4 alert stations/relay stations
Input voltage

100 VAC ±10%, 60 Hz single-phase (200 VAC can also be used)

Power consumption

10 A or lessCommand/responsetransmission

40-bit CDT special, polling method

Transmission speed

200 bps

Transmission lines

4-wire type

Siren output

Other

37

800 mm (W) × 2,000 mm (H) × 700 mm (D)Startup contact output

Broadcast output

100 W / 100 Ω: Amplifier output (up to 4 channels)

Alarm activation determination

Siren response monitoring, built-in amplifier response monitoring, alarm volume monitoring

WeightApprox. 420 kg or less

NIP P ON KOEI

Highly functional control panel for
automatic dam intake and dam gate control[Features]● Automatic dam intake control and automatic dam gate control based on waterlevel and gate data

Substations[Application]● System for dam water level adjustment through automatic dam intake control,
automatic dam gate control, and adjustment of the water flow rate in the hydropower
stationHydropower plants

Automatic gate control equipment[Specifications]
700 mm (W) × 1,800 mm (H) × 660 mm (D)Equipment configuration

Outdoor specifications (Freestanding with front maintenanceaccess)Connection to external

Terminal block, RS-232C

Control power supply

100 VAC (90 VAC to 115 VAC)

Operation method

Push-button switches, touch panel

Transmission
specifications

Transmission
speed

9,600 bps

Transmission
lines

4-wire type dedicated line
Intake gates, scour gates

Functions

Water intake control, flood control, securing of maintenanceflow, etc.

Energy management system /Renewable energy

Controlled items

Dam-related products

External dimensions*External dimensions do not include the roof and shield plate.

Disaster prevention
Other

N I PPON KOE I

38

Energy management system /Renewable energy
Nippon Koei handles all aspects of the electric power business from upstream operations to downstream
operations. We propose and implement all kinds of projects based on our strength as a company that canhandle all your needs, from the design of energy management systems to procurement, manufacturing,and construction. We are aggressively expanding into the renewable energy business by combining thehydropower, power plant construction, and system-related technologies that we have cultivated up to now.

39

NIP P ON KOEI

Hydropower plants

Demand-side energy management system (EMS)
System that minimizes energy consumption throughmonitoring and control by EMS
Target facilities(buildings, offices, factories, etc.)

Management system (EMS)

Main unit● Remote control● Scheduling control● Demand control

Internet

Enables monitoring,browsing, control,and configuration● Pulse measurement● CT and VT measurement● Temperature measurement
Communication line

Measurement unit

Control unit

data center

Control

Recording of
measurement data

Function
Measurement data monitoring
Anomaly/fault monitoring
Remote control
Scheduling control

Lighting 1

Control

Control

Control

ControlAir
conditioner 2Air
conditioner 3

CT and VT
measurements

Lighting 2

load system

Receiving andtransforming equipment

CT：Current
VT：Voltage

Lighting 3

Description
Numerical display and graph display of measurement data such as power received from the grid
Display of detected anomalies and faults; sending of notifications to the set email addresses upon detection of faults
Remote control of load equipment (air conditioning/lighting) Multiple load equipment units can be grouped and remotely
controlled at once
Remote control of load equipment (air conditioning/lighting) according to the set schedule
Monitoring of demand power and control of load equipment (air conditioning/lighting) when the set threshold value is exceeded

Measurement value interlock control

Control of the set load equipment (air conditioning/lighting) according to measured values (temperature, etc.) when the measured
value exceeds (or falls below) the set value

Data download
Analysis

Energy management system /Renewable energy

Demand monitoring and control

SettingDam-related products

Customer support through energy
efficiency consultations

Pulse
signals

ControlAir
conditioner 1

Monitor screen

Substations[Features]● Centralized management of multiple facilities(unified management)● Energy saving achieved by power-saving
control (scheduling control, demand control,
measurement value interlock control)● Visualization of the status of energy use

Setting of the schedule for each facility and email notification recipients in case of anomalies or faults
Downloading of past measurement data, summary data, and history information in CSV format
Display of past maximum demand for power and the number of warning issuances through demand control

EMS utilization example no. 1

Narita Onsen (Koriyama City, Fukushima Prefecture)*1: A scheme that subsidizes part of the expenses for introducing and updating facilities for energy conservation at existing plants, business establishments, etc.
*2: The subsidy rate can be increased from 1/3 to 1/2 through the introduction of EMS and provision of energy management and support services by companies registered as energy business operators.

EMS utilization example no. 2

Strengthening of disaster prevention functions by combining EMS and storage cells
Seiryu Shirakawa Kuo-renosato Roadside Station (Shirakawa Town, Gifu Prefecture)

Disaster-proof storage system
Power-receiving control panel
Blackout

Storage device

Target facilities

Facility manager(monitoring terminal)

Solar power generation facility

EMS

Specific equipment

Other

Seiryu Shirakawa Kuo-renosato Roadside Station is positioned as a disaster prevention center.
To strengthen disaster prevention functions through power supply from an autonomous power
supply at the time of power outages such as during disasters, and to realize a low-carbon areathat consumes locally produced energy, Nippon Koei single-handedly took on the required design,
procurement, manufacturing, and construction tasks for the energy infrastructure such as solar
power generation, fuel cells, and storage cells, along with energy-saving equipment and the systemfor controlling all of them (EMS). As a result, we were able to contribute to strengthening thedisaster prevention capabilities of the area, enabling it to supply enough electricity and hot water for
30 evacuees taking refuge at the roadside station for three days during a power outage.

Disaster prevention

In 2016, EMS was introduced at the Narita Onsen, a natural hot spring facility, using a fiscal subsidy*1 for business
operators working to improve energy use efficiency. Nippon Koei provided energy management and support services andupdated the equipment used by the facility. This is an example of the subsidy rate being increased to 1/2 as the result of
our introduction of EMS as an energy business operator*2. Currently, we support customers' energy conservation efforts
over the long term through the provision of energy management and support services.

Remote monitoring
Servers

Public facilities

OfficesN I PPON KOE I

40

Hydropower plants

Storage battery control system
System that controls storage battery according to the power
needs of electricity utilities and consumers.

Substations[Features]● Provides a variety of services including services
for electricity utilities (frequency adjustment, DR,etc.) and power-saving services for consumers(arbitrage*1, peak shift/cut, etc.) through cooperation
with power aggregators● Provides customized functions tailored to the
purposes and applications of customers*1: In areas where electricity prices differ according to the timeof day, cost savings can be achieved by exploiting these pricedifferences by charging storage batteries with power while it

Consumer’sinternal load

Consumer

Consumer's receiving andtransforming equipment

Transforming equipment
Charge and discharge

Power andfrequency
measuringequipment
Frequency values

is cheap and using the stored power during hours when it isexpensive.

Electric power company(transmission and distribution
business operator)

Storage battery control system
Charge and discharge commands

Dam-related products

Calculation of the amount of charge/discharge
according to frequency fluctuations

Internet

Transmission of
measuredvaluesTransfer commands tofrequency adjustment mode, etc.

Internet

Aggregator

Illustration of frequency adjustment

Storage battery control system application example
Energy management system /Renewable energy

4-MW rechargeable battery system at a cement factory (Wales, UK)
In January 2018, we installed a storage battery control system for a 4-MW storage battery at a cement plant in Wales, UK.
With approval from the UK's National Grid, a power transmission company, we began offering Firm Frequency Response (FFR) since February
2018.

Disaster prevention

Full view of the 4 MW storage battery

4-MW rechargeable battery (left), Storage battery control system (right)

Charge/discharge power (MW)Frequency

Charge/discharge power

Frequency (Hz)Storage battery control system

Time

Other

FFR operation record

41

NIP P ON KOEI

Hydropower plants

Renewable energy monitoring service
Monitoring cloud service that centrally monitors multiple power plants
Solar power generation monitoring service
Digital display
Internet

Receiving andtransforming equipment

Maintenance company
Power generation company
EPC

Email notification
upon occurrence ofan anomaly

Small-scale hydropower generation monitoring service

Data collection
deviceDigital display of a small hydropower plant

Disaster prevention

Monitor screen

Water turbine andgenerator

Energy management system /Renewable energy

Digital display of a small hydropower plant

Measurement data monitoring

Description
Numerical display and graph display of measurement data
Display of detected anomalies and faults; sending of notifications via email upon detection of faults

Data download

Downloading of past measurement data, history information, and forms in CSV format

File sharing

Cloud management of items such as inspection reports and field photos among users

Other

Setting

Power distribution panel /Control panel

Digital display of a solar power plant

Function

Pyranometer andtemperature meter

Dam-related products

Recording of
measurement data

Anomaly/fault monitoring

Solar cells
PCS

data center
Enables monitoring,browsing, control,and configuration

Data collection device

Data collection
deviceSubstations[Features]● B ro w s e r- b a s e d b ro w s i n g u s i n g a w e bmonitoring service● Anomaly/fault monitoring of all managed power
plants● UPS installed as standard● Compatible with all major domestic andoverseas PCS manufacturers● Supports output control functions● Suitable also for super-high-capacity power
plants● Measurement data provided via Web API

Setting of user-specific restrictions on functions, email notification recipients, etc.

N I PPON KOE I

42

Hydropower plants

Hybrid street lights
Street lights that require noelectricity and wiring work and canbe installed anywhere

Substations[Features]● Clean lighting that does not discharge CO2 and operates onelectricity generated by wind power and sunlight in a storage cell;automatically switches on/off● Since electrical work and wiring work are not required, can beinstalled anywhere as long as sunlight and wind conditions are right[Functions]● Wind power generation: Starts at a wind speed of 2.5 m/s or more
● Solar power generation: Designed for an average solar radiation of 4hours/day● Control unit: Overcharge protection circuit, overdischarge protection
circuit, auto light on/off function● Lighting equipment: High-brightness LED with long service life

Dam-related products

System configuration
Wind power
generator

Solar module

Energy management system /Renewable energy

Control
unit

Light

● Overcharge protection function● Overdischarge protection function● Automatic lighting function

Inverter

Storage cell[Specifications]

Disaster prevention

Type

Wind power generator

All-weather wind power
generator

Type

Sealed lead storage cell

Storage cell

Rated output

64 W or more

Rated output

12 VDC

Rated wind speed

10 m/sRated wind speed

Overcharge/overdischarge
protection circuit

Power generation start wind
speed

2.5 m/s

Power generation start wind
speed

Automatic-manual switch

Survival wind speed

60 m/sSurvival wind speed

Lit at sunset, switches off at a
set time

Type

Single crystal silicon type

Type

100 VAC

Maximum power

250 W

Maximum output current /Voltage

High-brightness LED

Short circuit current / Open
voltage

10 lx or more (directly below)

Control unit

Inverter
Solar module

Other

43

NIP P ON KOEI

Maximum power

50 W

Maximum output current /Voltage

3.16 A / 15.8 V

Short circuit current / Open
voltage

3.35 A / 10.5 V

Lighting equipment

Disaster prevention
Making the most of the advanced product development and quality control technology we have cultivatedin the electric power equipment business, we offer one-stop business processes ranging from development
of disaster prevention-related products to maintenance. We are committed to continue developing newtechnologies and new products to contribute to safety and security in civil engineering and railway projects
in cooperation with our industry-leading consulting division in Japan.

N I PPON KOE I

44

Hydropower plants

Rockfall detection system
Safety system that reliably detects rockfalls
that directly affect the area being monitored
and notifies the railway signaling system
and monitoring centers

Substations[Applications]● Installation of “wire switch sensors” for the detection of rockfalls
on structures such as fences and reinforced rockfall protection
embankments installed in areas being monitored, in order to reliably
detect the displacement and collapse of structures, which are caused
by falling rocks, by the stretch of wire ropes● Transmission of rockfall information to the signaling system to prevent
train accidents● For road disaster prevention and erosion control

Dam-related products[Features]● System for detecting falling rocks from the top of slopes with rockfall
detection sensors● Four detection fences for different snow depths are available for use
from flat land to snowy mountain areas● Maximum monitoring distance of 4,000 m[Specifications]
External dimensions

800 mm (W) × 800 mm (H) × 250 mm (D)Control panel: Up to 3 units (1 main unit, 0 to 2 sub units)

Equipment configuration
Sensors: Up to 60 units (4,000-m monitoring length)
Control power supply

100 VAC (80 V to 120 V)

Consumption current

5.25 A or less

Output information

Alarms, battery operation, failure

Energy management system /Renewable energy

Cut slope detection system
Safety system that reliably detects
landslides from the top of cut slopes that
directly affect the area being monitored andnotifies the railway signaling system andmonitoring centers

Disaster prevention[Applications]● Fences or reinforced rockfall protection embankments installed inareas being monitored detect displacement or collapse of a mass of
2 m2 or more by breaking of "disconnection sensor cables with weak
points"● Transmission of landslide information to the signaling system toprevent train accidents● For road disaster prevention and erosion control[Features]● System for detecting earth and sand to prevent them from getting on
the tracks when a cut slope fails● Maximum monitoring distance of 300 m[Specifications]
External dimensions

705 mm (W) × 530 mm (H) × 250 mm (D)Control panel: 1 unit

Equipment configuration
Sensor cable: Up to 300 m

Other

45

NIP P ON KOEI

Control power supply

100 VAC (85 V to 115 V)

Consumption current

2.0 A or less

Output information

Alarms, battery operation, failureSafety system that uses "tilt sensors" buried in
the soil of the railroad construction ground plane(rail foundation structure) to detect landslides
and earthfalls (fall-offs) that occur below theformation level and notifies the railway signaling
system and monitoring centers[Specifications]
External dimensions

705 mm (W) × 503 mm (H) × 250 mm (D)Dam-related products[Features]● System for detecting collapse or fall-in of embankment slopes● Detection of ground tilting caused by landslides in two directions, i.e.,horizontal and orthogonal● Maximum monitoring distance of 200 m

Control panel: 1 unit
Equipment configuration
Sensors: Up to 99 units (200-m monitoring length)
Control power supply

100 VAC (80 V to 120 V)

Consumption current

2.0 A or less

Output information

Alarms, battery operation, failure

Ashfall meter capable of automatic andcontinuous measurement of volcanic ashfall
during volcanic activity with the use ofwater, as well as measurement of rainfall[Specifications]
External dimensions

Equipment configuration

Disaster prevention[Applications]● Measurement of ashfall accompanying volcanic activity● Ashfall range can also be determined through the use of multiple
systems● Currently in use at volcanoes in various parts of Japan, including
Sakurajima

Energy management system /Renewable energy

Automatic ash rain gauge[Features]● Safe and automatic measurement of ashfall and rainfall in real time
without human intervention during volcanic eruption● Jointly developed with the Public Works Research InstituteSubstations[Applications]● Detection of earthfalls (fall-offs) and sensor disconnection due toground tilting or sloping using “tilt sensors” embedded in the soil of therailroad construction ground plane (rail foundation structure)● Transmission of landslide information and other data to the signaling
system to prevent train accidents● For road disaster prevention and erosion control

Hydropower plants

Embankment slope collapse detection system

Ash capture unit: 600 mm (W) × 1,330 mm (H) × 500 mm (D)System unit: 500 mm (W) × 1,320 mm (H) × 500 mm (D)Ash capture unit: 1 unit
System unit (control panel): 1 unit
100 VAC

Consumption current

3.0 A or less

Output information

Volcanic ash deposition amount, volcanic ash deposition
thickness, hourly rainfall

N I PPON KOE I

46

Other

Control power supply

Hydropower plants

Crack gauge (measurement)

Substations

Developed for easy measurement of crack
displacement in concrete structures andbedrocks; Can be used to measure cracks
in structures such as landslide areas andslope faces;
Obtained an industrial product certificationfrom Sukagawa City in 2013
[Application]● Simple and inexpensive tool for visual measurement of crack
displacement in all types of concrete structures and bedrocks[Features]● Can be easily installed by anyone with a drill● Can be read accurately by anyone with consistent readout values● Clearly visible vernier scale with 0.5-mm increments

Dam-related products[Specifications]

Energy management system /Renewable energy
Disaster prevention
Other

47

NIP P ON KOEI

Model

NKK-100

Measurement range

Up to 100 mm

Minimum readout unit

0.5 mmMaterial

Corrosion-resistant aluminum

Universal joint

Moving angle of 45°

WeightApprox. 300 gOtherSince Nippon Koei was established, we have delivered more than 25,000 line traps (blocking coils), whichwere our first product, and we have gone on to develop various original safety equipment indispensable
for work sites such as power stations, substations, distribution stations, power lines. We are committed tocontinue developing high-quality, high-performance products that contribute to the power industry.

N I PPON KOE I

48

Hydropower plants

Mold line traps
Compact and lightweight line
traps with a delivery record of over
25,000 units

Substations[Application]● Line traps are inserted in series on transmission lines, with lowimpedance characteristics for commercial frequencies and highimpedance characteristics for high frequencies; loss reduction for
high-frequency transmission circuits, stabilization of transmission
characteristics, and prevention of interference by the transmission
circuits of other power systems

Dam-related products[Features]● Line trap circuits can be selected according to their intended use,i.e., filter type, single-frequency tuning type, and two-frequency
tuning type● The filter type, which reduces the influence of reactance on thebus and downstream power equipment, is the most commonly used
● The main coil of the line trap is a heat-hardened structure that has
been impregnated with resin after winding an aluminum transposed
conductor in the shape of a coil
● Depending on the installation location, the installation method canbe either hanging or stationary● Built-in tuner and lightning arrestor and a structure that canwithstand large currents during power line accidents and lightning
strikes

Model

Mold

Rated current (A)Impedance (μH)

800 / 1,200 / 1,600 / 2,000

100 / 200 / 300 / 400 / 500

3,000 / 4,000

100 / 200 / 300

Energy management system /Renewable energy

Lb
Cb

Ca

La

Arr

R

Filter type impedance characteristics
Inductance 300 μH

1000

1800

800

Effective resistance

500

Reactance
400

(dB)

Insertion loss

300

3.0

ImpedanceΩ( )600Insertion loss

ImpedanceΩ( )

Other

49

1600

700

1400
1200

Reactance
800

2.0

400

1.0

200

140

180

220

260

300

340

380

420

460

500

(dB)

600

100

0

Effective resistance

1000

200

0
100

Impedance (absolute value)

Insertion loss

Disaster prevention

900

Inductance 300 μH

2000

Impedance (absolute value)

0
100

3.0

Insertion loss

2.0
1.0

160

180

200

220

240

260

280

300

320

340

0

Frequency (kHz)Frequency (kHz)Example of impedance and insertion loss of a filter line trap
(low-impedance type)

Example of impedance and insertion loss of a filter line trap
(high-impedance type)

NIP P ON KOEI

Detectors that do not require a power supply andcan be used for a broad range of applications[Features]● Lightweight and compact design that allows use in narrow
spaces, such as between lines● Emits light during voltage detection with the use of a neontube that does not require a power supply● Ensures safety during voltage detection as the neon tube
emits light when the voltage equals or exceeds the minimum
voltage value for detection● Easy angle adjustment of the light-emitting part
● Can be applied to a wide range of applications such as power plants,
substations, distribution stations, and power transmission lines.
T-275

T-66

T-22

Dam-related productsType H
Neon tube lighting status[Specifications]

Detector checker testers[Specifications]

Working
voltage

Total length

WeightMinimum
detection
voltage

H-33kV

11 kV to 33 kV

0.45 m

0.6 kg3 ±0.5 kV

H-66kV

55 kV to 77 kV

0.55 m

0.7 kg6 ±1 kV

A-154kV

154 kV2 m to 5 m

2.7 kg

12 ±2 kV

A-275kV

275 kV

1.8 m to 6 m

3.5 kg30 ±3 kV

Soden -33kV

11 kV to 33 kV

1.3 m to 1.8 m

2.0 kg3 ±0.5 kV

Soden -66kV

55 kV to 77 kV

1.8 m to 2.9 m

2.5 kg6 ±1 kV

Remarks

Model

Generatedvoltage

WeightApplicable
power
detector

Application

For hook rods

T-275

8,000 V

0.5 kgFor 275 kV

For checking thesoundness of theneon tube

T-66

2,000 V

0.8 kgFor 66 kV

For checking thesoundness of theneon tube

T-22

4,500 V

6 kg

For 33 kV

For checking thesoundness of thedetector

For telescopic
insulated rods

*Checker testers for checking the operation of the voltage detector are also available.

Electrical insulation hook bar

Disaster prevention

R-302

Highly durable hook rods that help reduce of the number of safety tools[Applications]● For operating isolators● For attaching and detaching grounding tools, and for voltage detection in
special high-voltage parts[Specifications]
Model

Total hook rod
lengthWeightMax. usable
voltage (kV)Remarks(standard)

R201

2m

1.1 kg22

For indoor use

R302

3m

2.0 kg77

For outdoor use

R402

4m

3.0 kg

77

″

R502

5m

3.6 kg

154

″

R603

6m

4.5 kg

275

″

R703

7m

6.5 kg

275

″

Other

[Features]● Uses FRP, a light and high-strength resin with excellent insulation properties
and weather resistance● Can be used in common with our voltage detectors and grounding tools,
helping reduce the number of tools● One-touch type connection that allows easy attachment/detachment

Energy management system /Renewable energy

Model

Substations

Type A[Application]● Safety tools for the detection of charges and power outages
in special high-voltage electric circuits, machines, and otherequipment

Hydropower plants

Special high pressure Voltage detector*Those for outdoor use are provided with an umbrella and a grounding device.

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Hydropower plants

Grounded metal
Highly durable grounded metal that canalso be used in salt-affected areas

K

B

C

Frontfacing

Horizontal

Vertical[Application]● Prevention of damage due to spark discharge
resulting from direct attachment to an electric circuit

Substations[Features]● Grounding location indicated on grounded
metal● Can be used in salt-affected areas as the main
body has anti-rust plating and the fixing bolts are
made of stainless steel● Reduction of electrolytic corrosion through amaterial similar to that of electric power lines[Features of models for copper bands]● Three types are provided for various
structures[Features of models for electric wires]● Free angle adjustment● Has a corona prevention tool (shielding cap)
for use when the working voltage is 154 kV[Specifications of models for copper bands][Specifications of models for electric wires] Working voltage: 66 kV to 154 kV

Dam-related products

Model/wire type

H (HDCC)(hard-drawn copper
conductor)

HAL(hard-drawn aluminum
conductor)

ACSR(aluminum conductor steelreinforced cable)

Model

K

38 mm² to 250 mm²
φ7.8 to φ20.7

38 mm² to 240 mm²
φ7.8 to φ20.3

32 mm² to 200 mm²
φ7.8 to φ20.3

Front-facingB

325 mm² to 600 mm²
φ23.4 to φ31.9

300 mm² to 860 mm²
φ22.4 to φ33.3

240 mm² to 610 mm²
φ22.4 to φ34.2

Horizontal

C

725 mm² to 1,000 mm²
φ35.2 to φ41.6

850 mm² to 1,030 mm²
φ37.8 to φ41.8

680 mm² to 810 mm²
φ35.1 to φ38.4

VerticalCopper band type

Weight (g)

50×t6

950

75×t6

1,100

50×t6

1,150

75×t6

1,300

75×t6

1,260

100×t6

1,350*When ordering, please specify the model, wire type, application range, etc.

Special high pressure earthing device
Energy management system /Renewable energy

Safety tools that can be used for various grounding tasks

BL

MCL

QL

[Applications]● Used after stopping the electric circuit of special high-voltage equipment

Disaster prevention

C[Specifications]

Other

51

Model

Application range

Weight (kg)
per setBL-30

φ6 to 27 mm

3.2

BL-50

φ21 to 49 mm

3.4

Usable voltage (kV)Remarks

For 33 kV to 275-kV electric wires

Standard 7-m ground wire;for hook rods

2 to 3

For 33 kV to 154-kV power transmission lines

66 kV: Standard 2.5-m ground wire
154 kV: Standard 5-m ground wire

2.3 (operating rod 0.6)

For 6.6-kV miniclad

2.3 (operating rod 1)

For 22-kV miniclad
For 6.6/22-kV
cubiclesC-30

φ6 to 27 mm

C-50

φ21 to 49 mm

MCL-6kV
MCL-20kV

Electric wire: 60 to 150 mm²
Copper band: t6 to 15 mm

QL-50

φ50 mm2 to 3QL-75

φ75 mm

2.5 to 3.5

NIP P ON KOEI

[Features]● Lightweight and easy to use● Can be used for various types of grounding work for electric wires,
miniclad, cubicles, and power transmission lines● The BL model is easy to use; simply twist half a turn to attach to or
detach from an electric circuit● The BL and MCL models can function with one operating rod as themetal fittings holding the electric circuit can be attached and detached● The QL model ensures grounding of the copper band byaccommodating a wide range of mounting angles● The BL, MCL, and QL models use an interlock mechanism to prevent
unintentional grounding/ungroundingStandard 4-m ground wire
6.6 kV: Standard 2-m ground wire
22 kV: Standard 4-m ground wire

JAPAN

Fukushima

About the City of Sukagawa inFukushima Prefecture, Home to Nippon Koei’sPower & Digital Business Unit
The city of Sukagawa in Fukushima Prefecture, where our manufacturing base islocated, is a regional city about 180 km north of Tokyo. Fukushima Prefecture, where
Sukagawa City is located, is the third-largest prefecture of Japan by area size. While it
has many modern towns with many buildings, it is also blessed with rich nature andvaluable historic assets. It still has towns where traditional culture is still alive, and it isa very attractive region with spots that offer different views across the seasons.
Located in the middle of such prefecture, Sukagawa is a historical city that prospered as a castle town of the Nikaido clan since the Kamakura period, and as one of
the best post towns along the Oshu Kaido route during the Edo period. The center ofthe city is served by the Tohoku Expressway and the Tohoku Shinkansen line connecting it to Tokyo and the Tohoku region. Fukushima Airport in the southeast part of thecity connects Sukagawa to domestic as well as overseas locations, making it a convenient city that allows transport to any location.

Tsuruga Castle (Aizu-Wakamatsu City)
An Edo-period castle that boasts a
400-year history.

Ouchi-juku (in the town of Shimogo in
Minamiaizu District)Traditional buildings that represent thestreets of the Edo period.

Mt. Bandai and Inawashiro Lake

Locationmap
Sukagawa

Fukushima●● TokyoSoma Nomaoi Festival (in Minamisoma City)
A traditional event with a history of morethan 1,000 years.

Sights and festivals of Sukagawa City

Sukagawa Peony Garden
A flower garden that boasts some 7,000
stems of peonies of 290 varieties.

Taimatsu Akashi Fire Festival
One of Japan’s three largest fire festivals.

Shakado River Fireworks Display
A summer festival where about 10,000
fireworks color the night sky.

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Electric Power Division, Power & Digital Business Unit
1-22 Dokyu, Morijuku, Sukagawa-shi, Fukushima 962-8508, Japan
Tel: +81-248-72-5121 Fax: +81-248-72-5179
https://www.n-koei.co.jp