Medium voltage, arc-proof, air-insulated,
metal-clad switchgear and controlgear
up to 12kV

HS21

For marine and offshore use

catalog P1123-E

Description
Characteristics
・Medium voltage switchgear for marine andoffshore use
・Full type approval
・Type tested in accordance with IEC 62271-200
・Metal-clad construction
・Independently arc-fault tested
・Circuit breaker with safety metal shutter
・Option of air insulated bus bars
・Safety mechanical interlocks
・Front service operation
・Circuit breaker insertion and withdrawal with thefront panel door closed
・Making current earthing switch
・Intelligent circuit monitoring devices

1Application
All TERASAKI medium voltage switchboards are
specifically designed and manufactured to meet theenvironmental and safety conditions of the marineand offshore industries.

Type testing
The HS21 switchgear and controlgear isindependently tested in accordance with IEC
62271-200 and marine classification society
requirements.

TERASAKI’s reputation throughout the marine andoffshore industry ensures that reliability and safety
are of prime importance in the design andmanufacture of the HS21 medium voltage
switchboard.

・Temperature rise test
This test is carried out at the rated current of theswitchgear and controlgear with the classificationsocieties requirements of a 45-degree C ambient
temperature being taken into consideration.

Design standards incorporated
The switchgear and controlgear and the instrument
have applied the following standards.
・IEC 62271-200 : switchboard
・IEC 62271-100 : circuit breaker
・IEC 62271-106 : contactor
・IEC 61869-2 : current transformers
・IEC 61869-3 : voltage transformers
・IEC 60255 : Measuring relays and protection
equipment
・IEC 60076-1 : power transformer
・JEC 1201 : zero-phase current transformer

・Dielectric test
Including impulse voltage and power frequency
withstand voltage test.
・Main circuit resistance measurement
There shall be less than 20% difference in the
DC measured resistance values of the main andcontrol circuits.
・Short-time and peak withstand current test
The panel is deemed to have passed the test if
there is no deformation or damage tocomponents and conductors following applicationof a short circuit current to the switchgear andcontrolgear.

Adapted various marine classification
・American Bureau of Shipping (ABS)・DNV (DNV)
・Bureau Veritas (BV)・Lloyd’s Register (LR)・Nippon Kaiji Kyokai (NK)・Arcing due to internal fault test
The switchgear and controlgear is deemed tohave passed the test if following the applicationof an internal arc fault, in accordance with IEC
62271-200 Annex A the original mechanicalintegrity and inflammability of the panel ismaintained.

Environmental specification vessel types
・Ambient temperature ：45°C
・Relative humidity：95%
・Vibration (, in accordance with IEC 60092-504)
all control devices
2 〜 13.2Hz, interval of vibration ±1.0mm
13.2 〜 100Hz, acceleration±0.7g
max. acceleration
0.7g

Applications
The HS21 switchboard is designed for use in:・Offshore Plant
・Oil Rig supply vessels
・Shore connection & On-shore Power Supply
System・Floating Production Storage Offloading vessels(FPSO)
・Floating Storage Offloading vessels(FSO)
・LNG Carriers・Large Passenger vessels
・Container ships
・Oil tankers
・Cruise ships
・Ferries
・Storage and Work Barges
・Floating Docks, Various Dredgers, others

Arcing due to internal fault test2

General specification
・Basic specifications and panel size of 7.2 kV and 12 kV are the same
(Refer to the following pages for panel size)
・Abundant prepared optional equipment

TypeHS21-1

HS21-2

HS21-3

HS21-4

Application
Standard conformance

IEC 62271-200 (IEC 60092-508) 1)Classification

ABS, BV, DNV, LR, NK and others

Loss of service continuity category(LSC) / Partition Class

LSC2B-PMInternal arc classification (IAC)

AFLR

RatingRated voltage

7.2 kV

12 kV

Rated frequency

50 / 60 Hz

Rated power frequency withstandvoltage

20 kV/min

28 kV/min

Rated lightning impulse withstandvoltage

60 kV

75 kV
25 kA 1sec (3sec) 2)

Rated short time withstand current
Rated peak withstand current

65 kA

Internal arc withstand current

25kA 0.2sec (20kA 1sec) 4)

Main bus bar current

1250 A

2000 A

1250 A

2000 A

Load bus bar current

600 A

600/1000 A

600 A

600/1000 A

Construction
Switchgear construction

Metal-clad
Low voltage compartment
High voltage compartment

Degree of protection

IP32
IP43

Optional equipment 3)- Inspection window- Arc gas exhaust duct
- Surge arrestor on main bus bar- Arc detecting system- Insulation tube cover on bus bar- Infrared rays window

Notes
1) ANSI C37.20.2 on request
2) 3 sec on request
3) Refer to the following pages about the details of optional equipment
4) With arc gas exhaust duct

3

- IP33 of low voltage compartment protection- Earthing switch on main bus bar

Dimensions
Basic panel design (example)

H1

H2

600mm overDw
H2 : With open pressure relief flap

Panel typeW (mm)

H1 (mm)

H2 (mm)D (mm) 3)

Generator panel
Feeder panel
Incoming panel
EVT panel

650

Motor panel

1680

Soft start motor panel

2300

2800

・
1880 4)Bus-tie panel 1 1)
Bus riser & EVT panel

800

Bus-tie panel 2 2)

900

Sync panel

1000

ATr panel

1000

Notes
1) LNG vessel only2) Container vessel only
3) With panel thickness
4) Top cable entry only4

Technical data
Typical unit
IC

F

G

BT

EVT

＊optional

M

BRE

ATr

SM

G

Generator panel

M

Motor panel

F

Feeder panel

ATr

Auto transformer panel

IC

Incoming panel

BRE

Bus riser & EVT panelBTBus-tie panel

SM

Soft start motor panel

EVT

Earthed voltage transformer＊An earthing switch can be provided in the EVT panel if required.

Vacuum circuit breaker and Vacuum contactor application
Panel types

VCB

VCT

630A

1250A

2000A

Generator panel○○

Feeder panel

○

○

○

Motor panel

○

○

○

Incoming panel○○

Soft start motor panel

200/400A○

Bus-tie panel○○：Applicable5○Technical data
Cable entry plan
The HS21 switchboard standard cable entry is from the bottom.
Power cables enter through the rear bottom plate and control cables through the front bottom plate.
Top cable entry can be provided, but consultation with TERASAKI is recommended as panel
dimensions will increase.
Rear
A

1680 mm

2)

D
E
C2

C1

B
Bottom
F

G2

G1

J
H
Front

Bottom entry cable

Power cable entry

Width

Panel type

Power cable entry (example)

C1(mm) C2(mm)D(mm)

Control cable entry

A(mm)

B(mm)

E(mm)

F(mm)

Standard panel 1)

650

450

Bus riser & EVT panel

800

600

Bus-tie panel

900—

Sync panel

1000

—

800

ATr panel

1000

800

—

G1(mm) G2(mm)

H(mm)

J(mm)

126

236

450
600
75

125

134

174

700

75

125

Notes
1) Refer to 650mm panel width on “Dimensions” page2) 1880mm: Top cable entry

Room planning
The room planning of installing HS21 in the switchgear room is shown below.
e
D

d
Rear

A

Front

c

B

w

b

Panel width -W

Caa...HS21 switchgearb...Side aisle
c...Front operating spaced...Rear maintenance spacee...Switchgear room wall

Room height (mm)A (mm)B (mm)C (mm)D (mm)≧2900 1)

≧1000

≧1600

1680
・
1880 2）≧700

only 650 mm
with 800 mm
with 900 mm
with 1000 mm
1) Without angle base2) 1880mm: Top cable entry

6Metal-clad
Compartments

Low voltage compartment

Each section of the HS21 metal-clad switchboard isseparated into four compartments.
・Circuit breaker
・Main bus bar
・Cable terminations
・Low voltage equipment
To withstand internal arc faults, segregation
between compartments is achieved by the use of
metal partitions.
See picture below.

The upper and lower low voltage compartments arelocated top and bottom of the circuit breakercompartment. Cables routed through the circuit
breaker compartment are protected by metalshielding.

Panel partitions
The compartment between each panel is divided by
the metallic partition.
Since each compartment have not penetrated
between panels, other panels are not affected evenwhen the accident happens by a certain panel.
Moreover, when extending in the future, it can
install easily.

Circuit breaker compartment
This compartment is equipped with a vacuum circuit
breaker and contactor.
The cradle is equipped with metal shutters.
Draw-out and insertion of the circuit breaker can not
be carried out without first satisfying the reliableinterlock procedure.

Main bus bar compartment
The main bus compartment is designed for 1250A
and 2000A round-edged, tinned-copper bus bars.
Insulation between panels is maintained by the useof track-resistant epoxy insulation materials. A fully
insulated bus bar system can be provided if
required.

Cable compartment
Standard cable entry is from the rear bottom.
However, if required cable, entry can be from top
side, but the depth of the panel will increase.
Access can not be gained to this compartment
without first satisfying the reliable interlock
procedure of the switchboard.
Also located within this compartment are:・Earthing switch
・Zero-phase current transformer
・Surge arrestor
・Voltage and current transformers

7

Construction
Basic panel design (example)

16

C

1

D

26
17

2

A

3

B

27

18

4

19

5
20
21

14

28
10

6

22
15
23

7
11
12
13

8

29

A

9

24
25

Front view

A
1
2
3
4
9

Side view

Low voltage compartment

C

Main bus bar compartment

16 : Pressure relief flap
17 : Insulation bushing
18 : Main bus bar: Upper door
: Instrument: Protection and control unit
: Switch: Lower door

B

Rear view

Circuit breaker compartment

D

5 : Door of circuit breaker compartment
6 : VCB draw-in / out handle port
7 : Indicator of circuit breaker position
8 : VCB draw-in / out interlock key hole
10 : Emergency open mechanism
11 : Interlock key for de-excitation
12 : Earthing switch operating handle port
13 : Lower cable compartment door key
14 : Vacuum circuit breaker
15 : VCB cradle

Cable compartment

19 : Surge arrestor
20 : Current transformer
21 : Load bus bar
22 : Power cable terminal
23 : Earthing switch
24 : Zero-phase current transformer
25 : Voltage transformer
26 : Upper door
27 : Upper cable compartment door key hole
28 : Lower door
29 : Lower cable compartment door key hole8

Product description
Pressure relief flaps
Top panel

To relieve pressure during an internal arc fault,pressure relief flaps are provided on the circuit
breaker, bus bar and cable compartments at thepositions shown.

Pressure relief flaps

Insulation bushing
To maintain electrical characteristics andmechanical strength the three-phase single
molding insulation bushings are manufactured
using epoxy resin material.

Insulation bushingSpecification
Rated voltage

12 kV

Rated power frequency
withstand voltage

28 kV / min

Rated lightning impulse
withstand voltage

75 kVOver current strength

25 kA 1sec (3sec) 1)

1) 3sec on request

VCB (VCT) cradle
The cradle is equipped with mechanicalinterlocking facilities on the basis of safety
consideration.
Metal shutters operate automatically on
withdrawal or insertion of the VCB / VCT and
VCCT.

VCB cradle mechanism

Metal shutters of VCB cradle

Metalshutters on
VCB cradle

Circuitbreakergrounding9Interlocks
・Mechanical interlocking facilities satisfy demand of IEC62271-200.
・Descriptions of the HS21 switchboard interlocks are shown below.
!. With metal-clad compartmented switchgear and controlgear, door should only be opened
when the part of the main circuit contained in the compartment being made accessible is dead.
@. They shall be provided with locking facilities, unless the safety of persons is assured by asuitable interlocking device.
#. The withdrawal or engagement of a circuit breaker, switch or contactor shall be impossible
unless it is in the open position.
$. It shall be impossible to close the circuit breaker, switch or contactor in the service position
unless it is connected to auxiliary circuit.
%. When circuit breaker is a connect position, it isn’t possible to do the “ON” position of earthing
switch.

Interlock release procedure for maintenance (example)
step1

step2

Circuit breaker open

step3

Turn CB draw-in / out
interlock key
Circuit breaker draw-out

step4

step5

step6

Removerear panel
Open CB comp’t door
( in case of CB maintenance )Earthing switch ON

step7

Turn and remove lower
cable comp’t door key

step8

step9

Cable
comp’tdoor open
Open
lower
door
Turn lower cable comp’t
door key

Removeupper
door
Turn and remove upper cablecomp’t door key

10Turn upper cable comp’t
door keyComponents
Vacuum circuit breaker HVF

Vacuum circuit breaker HVF・Applicable standards
Manualspringcharge port

The HVF vacuum circuit breakers meet all therequirements of IEC 62271-100 and the otherapplicable standards.

Control jack・Service life time
Charge /discharge
indicator

HVF vacuum circuit breaker operating mechanism
features reduced maintenance requirements,
providing a long-life expectancy of 30,000
operations.
Because of the small amount of contact erosion,contact life is increased to 20,000 operations for the
rated normal current.

Open / closeindicator
Operations
counter・Maintenance freeUpper
contact

Vacuuminterrupter

Lower
contact

・Rapid load transfer, synchronizing andoperating dutyWith its consistent short closing and opening times,
the HVF is especially beneficial in load transfer fromone circuit to another without interruption of service.
This high speed operation synchronizes the systems
so that they are parallel at the moment of contact
closure.
According to the relevant standards, tests werecarried out for the following operation duty.

HVF breaker on cradleO - 0.3s - CO - 3min - CO (for auto-reclosing)・Switching upload transformers
By using special contact materials, the chopping
current of the vacuum circuit breakers is only 4 to 5A.
This means that no dangerous over voltages arise
when unloaded transformers are disconnected.
Specification

1) Type number in the square

630 A

□

Manualopen
buttonPosition
handle

The circuit breaker require little maintenance.
In fact, only the parts subject to normal wear andaging must be serviced to ensure fully reliable
operation.
This involves simple jobs carried out by thecustomer’s personal with short servicing times andcorresponding downtimes and also long operation
periods between servicing.
Maintenance is confined to lubricating the operating
mechanism.
The vacuum interrupters and their supports need not
be serviced.

Type
Rated voltage
Rated current
Rated frequency
Rated short circuit breaking current
Rated short circuit making current
Rated short time withstand current
Rated control circuit voltage

Manualclose
button

HVF-104□/ HVF-204□ 1)
7.2 / 12 kV
1250 A
2000 A50 / 60 Hz
25 kA
65 kA
25 kA 3sec
DC 110Vz ...630A, x...1250A, c...2000A

11

Components
Vacuum contactor HCA

Vacuum contactor HCA (with single fuse)・Applicable standard
The HCA vacuum contactor is manufactured inaccordance with international standard
IEC 62271-106.

ON / OFF
indicator

・Service life time

Operations
counter

HCA vacuum contactor operating mechanism
features reduced maintenance requirements,
providing a long-life expectancy of 1,000,000
operations.

Control jack・Contact inspection

Position
handleInspection of contacts for wear can be easily
carried out by removal of the front plate andexamination of the maximum contact wear point(2mm) marked in white on the contact.

Upper
contact

If the contacts are eroded below this mark, thevacuum interrupter should be immediately
replaced.
Specification

Fuse
HCA-6□C□1)
7.2 kV50 / 60 Hz
200 A
400 A

Type
Rated voltage
Rated frequency
Rated current
Rated short circuit breaking current(with power fuse)
Rated short time current
Rated control circuit voltage
Max motor capacity

Lower
contact

40 kA
3.2 kA 1sec
AC / DC 110V
1500kW
3000kW

1) Type number in the square □HCA-□C□
2...200A, 4...400A

HCA contactor on cradle

F...fixed type without fuse
J...fixed type with fuse (double)
A...fixed type with fuse (single)
B...draw-out type without fuse
D...draw-out type with fuse (single)
H...draw-out type with fuse (double)

Earthing switch
The earthing switch is located on the VCB/VCT
cradle and has a making current capacity ratingthat ensures maximum possible protection for theoperator in case of an error.

Earthing switch

Specification
Rated voltage
Rated short time withstand current
withstand voltage
Rated short circuit making current
withstand voltage

12 kV
25 kA 3sec
63 kA

12

Components
Multi-Protection Relay PRR-1H

Multi-Protection Relay
PRR-1H-G・General characteristic
PRR-1H is a multi-protection relay for medium or low voltage
circuit breakers that is capable of indicating via LEDs that theload current is picked up or the breaker trips open andshowing various information including the phase current, line
voltage and fault current on the LCD.
The relay is available in three types: for generator protection,
feeder circuit protection, and transformer protection.

・Functions¡Multi-protection¡Detection via zero-phase voltage¡Directional ground fault current detection¡Ratio differential characteristic¡Reverse power trip
¡Readout of trip/alarm cause¡Internal clock¡Self-diagnostic

・Measurement/event indication function
Load current(±1.5%)
Line voltage(±1%)

PRR-1H-G PRR-1H-F PRR-1H-T
Generator Feeder circuit Transformer
protection
protection
protection

Present max value
Present value of each line voltage

Electrical energy
Electrical energy(±2.5%)

Frequency

・Protective function

Present value for each phase

Present value
Electrical power
Demand value(±2.5%)
Max. demand value

Power factor(±5%)<Specification>・Control voltage: 110V DC, 24V DC
・Electric power consumption: 5VA
・Dimensions: W230×H140×D202

Present value
Present value

Adjustable long time-delay trip

LT

○

○

○

Adjustable short time-delay trip

ST

○

○

○

Adjustable instantaneous trip

INST

○

○

○

Adjustable undervoltage trip

UV (27)○△―

Adjustable overvoltage trip

OV (59)○△―Adjustable reverse power trip

RP (67R)○――OVGR (64)○○○

DGR (67G)

○

○

○

(87G)

○

―

―

(87T)

―

―

○

PTA

○

○

○

PTA2

○

―

―

Overvoltage ground
Adjustableground fault trip Directional ground
Ratio differential trip DIFF

Fault current
Trip event log

Indication of cause

Pre-trip alarm

Fault occurrence time
Alarm event log

Alarm cause・Alarm event log
Indication of alarm fault current value andoperating time○: Standard △: Optional

・Features• The zero-phase voltage detection scheme is used for insulation monitoring, which allows therelay to apply to an isolated neutral system.
Then, the directional ground fault protection scheme prevents miss-detection due to occur
ground fault of other system.
• The ratio differential characteristic permits application of the relay to fault detection in orprotection of transformers and generators within a system. The bias function also serves toprevent a malfunction.

13

Components
・Connection diagram
CT4

Reset swith

CT5

EVT

Trip signal input

CT6

Auxiliary swith input

G
Dn

DC

DB

re

DA

Tc

a

c

UA

UB

UC

Y1

Un

Y2

A-

A4

A3

A2

A1

O1

O2

O3

O4
C+

kA
CT1

PRR-1H-G

CCc

kB
CT2

TS

kC
CT3

TE
n
Z1

ZCT
Z2

R

S

T

S0-

S1+

P0-

P1+

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

Terminal description
S0- , S1+ Control power input for Protective function 110V DC, 24V DC
P0- , P1+ Control power input for Monitoring function 110V DC, 24V DC

A1 - A⎫⎪ Measuring CT
KB - n ⎬⎪ LT,ST,INST,PTA,PTA2,DIFF,RP,(NS)KC - n ⎭DA - Dn ⎫⎪ Measuring CT for Differential protection
DB - Dn ⎬⎪ DIFFDC - Dn ⎭A3 - AA2 - AKA - nA4 - A
1 - 2
3 - 4
5 - 6
7 - 8

⎫
⎪
⎪
⎬ Monitoring function 4 – 20mA signal output
⎪
⎪
⎭
⎫
⎪
⎪
⎪
⎪
⎬ Operation signal output
⎪
⎪
⎪
⎪
⎭

Z1 - Z2 ZCTa - c Auxiliary switch input

11 - 12

Tc - cTrip signal input

13 - 14re - cReset switch

UA , UB , UC （, Un ） Rated voltage input for UV, OV, RP, (UF/OF)

15 - 16 PTA operation signal output
17 - 18 PTA2 operation signal output

Y1 - Y2 EVT
O1 - O2 ⎫ Monitoring function CT for 4 – 20mA signal

19 - 20 Lock-out
21 - 22 Circuit self-diagnostic (For Protective function)

9⎬

O3 - O4 ⎭ CT rated current: 1A or 5A

10

TS - TE Trip signal output
C+

Communication line (+)

C-

Communication line (–)

Cc

Communication line (common)・Other features• Separation of the control power for the protection circuit and measuring circuit enhances theredundancy and reliability.
• Information displayed on the LCD of the front panel includes the phase currents, voltage, electricalenergy, demand electrical power, power factor, pickup current & time settings, fault current and trip
pickup time.
• An internal clock allows the fault occurrence time to be displayed on the LCD and up to 100 fault
events and 100 alarm events to be viewed in chronological order.
• The self-diagnostic function comes standard with the relay, providing an alarm via a relay contact
output if an error occurs in the CPU.
Optional functions are shown below.
• Output signals including current and voltage are analogue and delivered via 4 to 20 mA DC terminals.
• Modbus communication is available.

14

Components
Motor protection relay PRS-1S

Motor protection relay
PRS-1S・General characteristic
The PRS-1S is an electronic motor protection relay
with high functionality that detects various states whenan AC motor starts and while it is operating.
Measurement and monitoring functions are installed inaddition to the basic 3 elements of the motor
protection function (overload protection, open-phase
protection, and reverse-phase protection).

・ANSI 51R : Overload protection function
The protection function is adapted to the motor
starting characteristics and the load characteristics.

・ANSI 46 : Open-phase protection function“Open phase” is a state in which the motor operated ina single-phase state because the power wire
connected to the motor became disconnected, theconnection area was loose, or there was a
disconnection inside the motor. Open-phase states
can cause motor winding burnout, and detecting
open-phase states can prevent this.

・ANSI 47 : Reverse-phase protection function“Reverse-phase” is a state in which the phasesequence of a motor is connected in reverse and the
motor rotates in the reverse direction. This cannot bechecked visually in some installation locations, andreverse-phase protection is a function that is essential
in order to prevent reverse rotation.

Specifications
Control voltage

DC110V

VA consumption

5VA

Outline dimensions

Width 96 × height 144 × depth 116(includes terminal area on back side)

Temperature range-10℃〜+55℃

Storage temperature -25℃〜+75℃
Humidity

95% or less, and there must not be any
condensation

Based standard

IEC60255
Measuring relays and protection equipment
IEC60947-4-1 Part 4
Contactors and Motor-Starters

・Other protection functions• ANSI 51L : LOAD INCREASE• ANSI 50 : OVER CURRENT SHORT• ANSI 49S/51 : THERMAL CAPACITY• ANSI 46 : UNBALANCE• ANSI 48 : MAX START TIME

• ANSI 66 : TOO MANY STARTS• ANSI 67 : DIRECTIONAL GROUND RELAY• ANSI 49R : TEMPERATURE• ANSI 37 : HIGH & LOW CURRENT• EXTERNAL FAULT・Function that displays and saves the activation information and history¡Trip and alarm activation: If trip or alarm occurs, the time of occurrence, cause of activation, activation
value, and activation duration are displayed on the screen. The system can save 100 instances each oftrip and alarm activation.
¡History of phenomena that occurred: The system can save a total of 200 instances of the history of thefollowing phenomena that occurred. These phenomena will be displayed on the screen in chronologicalorder, so it is easy to track detailed information about the phenomena that occurred.
• Trip activation (time of occurrence / cause of activation)• Alarm activation (time of occurrence / cause of activation)• Reset operation (time of occurrence / reset operation details)• External input (time of occurrence / external input state)・Measurement display function¡The display screen displays the following measurement values.
• Phase current • Unbalanced current • Motor winding temperature • Motor load current• Leakage current • Motor starting time • Motor starting current • Motor operating time
• Motor operating cycles • External command input state • External output operating state・Monitoring function¡Communication function: In Modbus RTU mode (RS-485), it is possible to read and write protection setting
values and output measurement values and histories.
¡Analog output: The maximum phase current value can be converted to 4-20 mA current and output
externally.

15

Components
Generating plant management system GAC21
・General characteristic

PLC (programmable logic controller)

The GAC21 Generating Plant Management System isdesigned to be reliable and user friendly. The systemdesign is based on TERASAKI’s experience as a
dedicated manufacturer of generator control technology
and multiplex transmission systems that havesuccessfully been supplied to a large number of marine
projects for many years.
The GAC21 System is a function-dispersed type systemthat is designed to operate using its PLC(programmable logic controller).
It consists of two control units, the GAC21 Automatic
Generator Controller and the Type EAS-201 Multifunctional synchronizer and can be utilized with up to a
maximum of 5 generators.

・PLC (programmable logic controller)
The GAC21 automatically controls generators using its
programmable logic controller. It covers the
management of the entire generating plant, including
the automatic load sharing function, automatic start,
automatic switching and power management.
Control parameters and settings can be easily modified
using the device provided with every GAC21 system.

Power
moduleCPU module

other module

Specification
Type

Micrex-SX

Standard conformance

IEC 61131

Control power supply

24V DC (+30% to -25%)CPU

32 bit processor

Processing speed

20 to 520 ns

Program memory

32 k step
analog input / output,
digital input / out put,
communication
Max. 5Module function
No. of controlled generators
Communication

RS232C, RS485,
TM, SX-BUS, P-link, Modbus 1)

TM ... TERASAKI multiple transmission system
SX-BUS, P-Link ... Fuji Electric original high speed
data link system
1) Constraints conditions

Multi functional synchronizer EAS-201
Automatic digital synchronizer
EAS-201

The EAS-201 Multi functional synchronizer has following
features:・Characteristic• Check synchronizing function for manual operation
support• Self- diagnostic capability for CPU error, ADC error
and power low• Easy to realize error by LED indication• Independent LED synchro lamp function from CPU• Function for confirming normality of synchronous
detection (Beat wave form)• Easy to save event log• Modbus communication can be transferred analogue
data including voltage, frequency and so on.

Specifications
Type
Busbar input voltage
Generator input voltage
Rated frequency
Closing designation (selective)
Control output
Serial port

16

EAS-201110 / 220V AC(switching)
50 / 60 Hz
SLOW, FAST, SLOW/FAST
250V AC 3A
24V DC 3A
RS-485, Modbus

Controlled source

Busbar side
110V DC

Dimensions (mm)W96 × H96 × D182

Optional equipment
HS21 prepares the various option equipment toimprove safety more.
The list of the option equipment is shown below.

Inspection window

IR Window

・Inspection window
Installed in the circuit breaker compartment door
when visual confirmation is required by ships staffof the operating position of the circuit breaker.

・IR Window
Using Thermography enables temperature
measurement of busbar without opening theclosed compartment.

・Arc detecting system
Detection of an internal arc fault utilizing a lightsensitive device (or current monitor) to detect arc
flash. This enables the circuit breaker to open in
the shortest possible time thereby minimizing
damage to the switchboard.

CB compartment door

Cable compartment door

Arc detecting system

・Arc gas exhaust duct
Should be used to divert arc gases to a safe
location in the event of an internal arc fault.

・Fully insulated bus bars
OptionThis system affords additional insulated
protection. Insulated tube on bus bar and boots
are fitted to all bus bar connection points.

Arc detecting
deviceInsulation boots

Arc gas exhaust duct
・Earthing switch on main bus bar
If the customer requires additional safety, anearthing switch can be provided for the main bus
bar.

・Surge arrestor on main bus bar
Additional protection can be provided on the mainbus bar by the fitting of surge arrestors.

17

Fully insulated bus bars

Accessories
The accessories provided as standard are shown
below.

Lifter・Circuit breaker lifter
Used to assist in the removal of the circuit
breaker, contactor etc.
Standard typeCompact type

Height1800 mm

HeightWidth

600 mmWidth

600 mmDepth

1250 mm

Depth

1150 mm

850 mmCompact type・Circuit breaker draw-in/out handle
Circuit breakerdraw-in/out handle

Used to assist in the withdrawal and insertion of
the VCB and VCT.

Standard type・Earthing switch operating handle
Used for earth switching operations.

Earthing switch
operating handle

・Charging handle
Used to charge the closing spring of the circuit
breaker.

Charging handle

・Vacuum checker

Vacuum checker

Used for check the vacuum degree.
Specification
Input voltage

200 / 220 V AC

Out-put voltage

11 kV / 22 kV AC

Weight

22kg

Memo

18

www.terasaki.co.jp

Head/Osaka Sales Oﬃce

Tokyo Sales Oﬃce

Kyusyu Branch Oﬃce

6-13-47 Kamihigashi, Hirano-ku,
Osaka 547-0002, Japan

Nikko Kayabacho Building 5F, 1-6-10, Kayabacho,
Nihonbashi, Chuo-ku, Tokyo 103-0025, Japan

3798-4 Kubara, Yamashiro-Cho, Imari-City,
Saga Pref 849-4256, Japan

TEL +81-6-6791-2786
FAX +81-6-6791-2773
hakuei-osaka@terasaki.co.jp

TEL +81-3-5644-0150
FAX +81-3-5644-0155

TEL +81-955-28-3700
FAX +81-955-28-3799

Head Oﬃce/International Sales Dept.

Shanghai Representative Oﬃce

Hamburg Representative Oﬃce

6-13-47 Kamihigashi, Hirano-ku,
Osaka 547-0002, Japan

Room No.1405-6, Tomson Commercial Building,
No.710 Dong Fang Road, Pudong, Shanghai 200122, China

Anderheitsallee 4c, D-22175 Hamburg,
Germany

TEL +81-6-6791-2790
FAX +81-6-6791-2773
hakuei-osaka@terasaki.co.jp

TEL +86-21-5820-1611
FAX +86-21-5820-1621
terasaki@vip.163.com

TEL +49-40-55-611-911
FAX +49-40-55-611-912
dan.graniceanu@terasaki.de

TERASAKI ELECTRIC CO.,(F.E.) PTE. LTD.

TERASAKI ELECTRIC (SHANGHAI) CO.,LTD.

TERASAKI ELECTRIC (CHINA) LTD.

17 Tuas Street Singapore 638454

Building 5 & 7, No.399 Xuanzhong Rd,
Nanhui Industrial Zone, Shanghai, China 201314

Building A-04, NO.76, Chuangyu Road, Ningxi Street,
Zengcheng District, Guangzhou 511338, China

TEL +65-6561-1165
FAX +65-6561-2166
tefe@terasaki.com.sg
www.terasaki.com.sg

TEL +86-21-5818-6340
FAX +86-21-5818-6350
tsc@terasaki.com.cn
www.terasaki.com.cn

TEL +86-20-8270-8556
FAX +86-20-8270-8586
tcsales@terasaki.cn
www.terasaki.cn

AUG. 2023
Ratings and specifications covered in this brochure may be subject to change without notice.

Printed in JAPAN