［ Systems・Components ］

Development of Digital Type
Protection Control Unit,
IPMAT ⅢS
Keywords

Takashi Ishii,
Shigeyuki Izawa,
Takumi Yoshida,
Atsushi Sakamoto

Protection control unit, Transmission, IO link, Analysis, Data save, Replace

Abstract

The Intelligent Protection, Measuring, And Transmission unit ⅢS (IPMATⅢS) is a digital protection control tool with various functions of protection, control, measurement, and transmission. It was developed as a successor model ofIPMAT Ⅱ/ⅡA. The immunity level improved the visibility and operability by upgrading the user interface (based on JEC-2501-2010 standard). Compared withformer models, the measurement accuracy has been improved by increasing theresolution of the analog Input/Output (IO). Still more, a testing mode function
was added to improve the work efﬁciency at the time of equipment inspection.
High speed transmission is realized by adding an IO link Ⅲ for data transmission. Regarding the data-save function, data recording time has exponentiallyincreased. This equipment is favorably advanced in maintenance and operational management such that the saved data, including error logs, can also be collected by USB memory.

1 PrefaceWe have been offering IPMAT Ⅱ/ⅡA as a digital type protection control unit provided with various
functions of protection, control, measurement, anddata transmission. More than ten years have passed
since the development of this models and customer
needs have changed. The hardware parts including
major components have been discontinued by themanufacturers. Users now require an improvementof immunity.
This paper introduces the features of IPMATⅢS developed as a successor model of IPMATⅡ/ⅡA to meet requests for functional improvement.

2 Outlines of IPMAT ⅢS
Table 1 shows a list of speciﬁcations. The
all-digital system is adopted for the integration of aprotection, monitoring, control, and transmissionfunction as a package. Since its adoption, this system realized a compact and intelligent switchgear.
We also realized high reliability of the protection
function by including the Central Processing Unit(CPU), duplicated from the analog portion. As anoptional function, it supports IO link transmission
and transducer output resulting in a realized high-speed transmission. Fig. 1 shows an example of thenetwork system conﬁguration where IPMAT ⅢS isused.

3 Function
3.1 Hardware Conﬁguration
The hardware (analog block and CPU block)comes in a duplex conﬁguration for main and accident detection. A hardware/software conﬁguration
with no malfunction due to a single fault is adapted.
A wide-area CT has been implemented so that awide measuring range can be secured.

3.2 Type
IPMAT Ⅱ/ⅡA were classiﬁed into 10 types.
While for the IPMAT ⅢS, the 5 types in all are integrated for each respective function. Fig. 2 shows
the type of integration. In order to assure interchangeability between the former and new models,
the setting ﬁle for a former model of IPMAT Ⅱ/ⅡA
can be used for the new model.

3.3 Performance Improvements
3.3.1 Immunity
Table 2 shows the JEC-2501-2010 Standard towhich the immunity test has conformed. In IPMATMEIDEN REVIEW Series No.181 2021 No.1

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Table 1 A List of Specifications
A list of IPMAT ⅢS speciﬁcations and differences from the former IPMAT Ⅱ/ⅡA model are shown. Meanwhile, the IO link transmission isan optional feature.
Item

Specifications
JEC-2500-2010, JEC-2501-2010, JEC-2502-2010

Only JEC-2500-1987

Auxiliary power supply voltageDC100 V・DC110 V

Same as left

Auxiliary power supply voltage
consumption

Regularly 6 W, Max. 20 W

Regularly 10 W

Permissible voltage regulation−15〜＋10% ( Temporarily −20〜＋30%)

Same as left

Rated frequency

50 Hz or 60 Hz

Same as left

Rated current

5 A or 1 A

Same as left

Rated voltage

VT secondary rating: 110 V
EVT tertiary rating: 190/110 V
ZPD secondary voltage: 1 V

Same as left

BurdenCT secondary: 0.2 VA, VT secondary: 0.2 VA,
EVT tertiary: 0.2 VA, ZCT secondary: 1 Ω,
ZPD secondary: 9 kΩ or more

Same as left

Applicable
Ambient
environment temperature

Characteristic guaranteed temperature: 0〜40℃
Operational guaranteed temperature: −10〜＋55℃
Storage temperature: −20〜＋60℃

Operational guaranteedtemperature: up to ＋50℃

Relative humidity

30〜80%RH (No dew condensation)

Same as left

Environment

Do not expose to rigorous dust, corrosive gases, rainstorm, or direct Same as left
sunlight

Altitude2000 m or below

Same as left

External
dimensions

W279 × H196 × D87 mm

W・H: ＋1 mm, D：−2 mm

Mounting size

W271 × H86 mm

Same as left (with mountinginterchangeability)

WiringAnalog input circuit: M3.5-18P
Binary input/output circuit: MIC-17/21PTransmission circuit: M3.5-5P
A/O circuit: D3100-8P
FG: M4Same as left (with wiringinterchangeability)

Number of points

14 points Photo-coupler

Same as left

Voltage

Dimensions

Input

DC110 V 5 mA

Same as left

ContactNumber of points
point output
Contact capacity

3 points (ON, OFF, trip)

Same as left

Making capacity: DC100/110 V 10 A (resistance load)
Limiting breaking capacity: DC100/110 V 0.1 A（L/R ＝ 8 ms）

Same as left (where, L/R ＝ 7 msfor IPMAT Ⅱ)

OutputNumber of points

8 points Open collectors (one of them for WH output)

Same as left

Voltage

DC100/110 V 60 mA

Same as left

IO link Ⅱ/Ⅲ metal

IO link Ⅱ metal

Twist pair Bus state

Same as left

IO link Ⅱ: 1 M/500 K/250 K/125 Kbps
IO link Ⅲ: 5 M/2.5 M/1 Mbps

Same as left for IO link Ⅱ only

Distance Distance IO link Ⅱ: 240/480/800/1000 m IO link Ⅲ: 140/300/600 m
betweenpolls

Same as left for IO link Ⅱ onlyTotal
IO link Ⅱ: 240/480/800/1000 m IO link Ⅲ: 140/300/600 m
distance

Same as left for IO link Ⅱ only

RemoteTypetransmission
Transmission path
path
style
Transmission
speedTransducer
outputOutput range

DC4〜20 mA output, applicable to 4ch output

Same as left for IPMAT Ⅱ-A only

BurdenExternal load resistance: 550 Ω or below(Applicable range: 55〜550 Ω)Same as left for IPMAT Ⅱ-A only

ⅢS, by optimizing the design of the circuit pattern
for the external noise, immunity performance wasensured, which can clear the load switching test
even under the severest condition assumed duringoperation. The protection relay is installed close to22

Difference from IPMAT Ⅱ/ⅡA

Applicable standard

MEIDEN REVIEW Series No.181 2021 No.1

the circuit breaker from where the shield plate
removed. The test result indicates that the obtained
values were considerably better than the standard
level. The immunity performance was conﬁrmed tobe higher than the former model.

Ethernet

Compact plant controller,
UNISEQUE ADC6000

Small/medium-sized personal computer
type monitor control unit,
MEISVY OPMS 40/60

I/O unit

Monitorpanel

IO link Ⅱ/Ⅲ (metal)
IPMAT ⅢS
for extrahigh tensionType RIPMAT ⅢS
for extra-hightension Type R

High-voltage switchgear

72/84 kV cubicle type gas-insulated switchgear

IPMAT ⅢS
for high-voltagemotors Type HHigh-voltage motor panel

High-voltage motor

Fig. 1

Example of Network System Configuration

An example of a network system is shown when three types of IPMAT ⅢS models are introduced. When a transmission function (optional)
is used, the system can be connected to a local transmission path (IO link Ⅱ/Ⅲ: metal) and any network system can be establishedaccording to the system scale and application.

IPMAT ⅢS type (5 types)

Former type (10 types)
MR85B-01 R1: Extra-high voltage power receiving 1Integration

MR85B-03 R3: Extra-high voltage power receiving 2
MT85B-04 T: Transformer

MM85B-01 H: High-voltage motor

MR85N-01 R: Extra-high voltage power receiving

MT85N-04 T: Transformer

MM85N-01 H: High-voltage motor

MR85B-02 R2: High-voltage power receiving
MB85B-01 B: High-voltage bus
MF85B-01 F1: High-voltage feeder, 3-phase

MW85N-01 W: High-voltage complex

MF85B-02 F2: High-voltage feeder, single-phase
MW85B-01 W1: High-voltage complex

MW85B10W

Fig. 2

Wide-area W: High-voltage complex(Applicable to wide-area CT)

MW85N10W

Wide-area W: High-voltage complex(Applicable to wide-area CT)

Type of Integration

A list of IPMAT ⅢS integration objects is shown for 10 types of conventional models.

3.3.2 Interface
Fig. 3 shows a conﬁguration of IPMAT ⅢS. For
IPMAT ⅢS, the user interface was improved with auniversal design. The Light Emitting Diodes (LED)
has a structure that can be recognized from the side
to improve visibility.
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In addition, a Liquid Crystal Display (LCD) wasadopted, which is devised to support the notation inKanji. The number of switches decreased from for-3.4 Functional Improvements
3.4.1 Input/Output (IO)

Table 2 Applicable Standard for Immunity Test
The standard test items and speciﬁed values of JEC-2501-2010
to which the immunity test has conformed are shown.
JEC-2501-2010
Test items aiming at
doubled durability ofJEC-2501
Static electricity discharge
immunity

InstrumenttransformerPower
sourceControlbinaryinput/output

Contact discharge: 8 kV
Air discharge: 15 kV

Commercial power frequency 300 V for 10 s
immunity
150 V for 10 s
2.5 kV

2.5 kV

2.5 kV

EFT/B immunity

2.0 kV

1.0 kV

1.0 kV

Rectangular wave impulseimmunity

1.0 kV

1.0 kV

1.0 kV

Surge immunity

2.0 kV
1.0 kV

2.0 kV
1.0 kV

2.0 kV
1.0 kV

Commercial power frequency 30 A/m for 60 s
magnetic field immunity
300 A/m for 2 s
10 V
150〜80 MHz

Radiant radio frequency
magnetic field immunity

10 V/m80〜1000 MHz
1400〜2700 MHz

The analog IO resolution of IPMAT ⅢS is a13-bit (formerly 12-bit) and 12-bit (formerly 10-bit)
for the A/D converter and the A/O converter, respectively. Compared with former models, accuracy isimproved and more accurate signal processing ispossible. In the contact output, three outputs (ON/OFF trip) may be selected according to the application.

3.4.2 Data-Save Function

Damped oscillatory wave
immunity

Radio frequency magnetic
field conduction interference
immunitymer 18 to 12 so that visually intuitive operation canbe performed with ease.

Electric waves (Power Stand- 150/400/900 MHz：5 W
ard B-402)
Mobile: 800 MHz, 1.8 GHz
Wireless LAN: 2.4 GHz, 5.2 GHzThe Data-Save function automatically records
the waveform data and relay operation informationfrom 18 cycles before to 9 cycles after, a circuit
breaker trip due to a grid power system accident,
while IPMAT Ⅱ recorded from 6 cycles before to 2
cycles after, and IPMAT ⅡA recorded from 11 cycles
before to 5 cycles after. In IPMAT ⅢS, more information is recorded. This information can also berecorded automatically in the event of a relay operation other than a trip or in the event of an error.
The analysis is performed by connecting to a
Personal Computer (PC) with a dedicated tool
installed. The status at the time of an accident canLCD display

Operating place changeover switch

Operator switch

Adoption of LCD for Kanji, alphanumerical,and Katakana display

Selector switch for place of circuit breaker
operation (remote, local).

Circuit breaker ON/OFFswitch

LED display
LED display to indicate relay
operating conditions, CB
ON/OFF status, and the locationof the CB in operation

Functional switch
Modal changeover and numericalsetting switch for fault indication,measured values, setting, andforced operation displayed onthe LCD screen

Fig. 3

Setting switch

Forced operation switch

Maintenance terminal

Test terminal

Switch to set up protectivefactors

Final output switch for forced
operation and reset at the timeof protection interlock test

Execution tool for fault indication
name input, fixed sequence setup,
and measured value scale setting

Terminal to enable relay testing in frontof the terminal switchgear for operatingtime measurement of protection factors

Configuration of IPMAT ⅢS

A condition of the opened switch cover is shown. For IPMAT ⅢS, the number of switches is decreased and switches directly relating tocircuit breaker ON/OFF, setting, and relay operation are covered in order to prevent misoperation. When the function switch in the centeris actuated, the LCD displays fault indications, measured values, and setting values in a changeover mode. An LCD is used to visualize
the operating condition of a circuit breaker and the location of the operated circuit breaker.

24MEIDEN REVIEW Series No.181 2021 No.1

nect the PC to read and write the ﬁle. To make asetting, a PC is used to read and write the settingﬁle.

3.4.5 Transmission
For transmission, the IO link of our uniqueremote IO transmission path is used. Conventionally,
this function was available for the IO link Ⅱ transmission only, but it also supports the IO link Ⅲ transmission by changing a setting ﬁle. By adding the IO
link Ⅲ support, it realizes the improved transmission
rate and an increase of number of nodes.
Fig. 4Example of PC Screen Display of Analysis Tool

An example of a PC screen display is shown for IPMAT ⅢS analysis tool.

be checked with the data-saved accident waveform.
Fig. 4 shows an example of the PC screen displayof the analysis tool.

3.4.6 MicroUSB
IPMAT Ⅱ/ⅡA used serial communication toacquire data, however, recent PCs do not havea serial communication interface. IPMAT ⅢS isequipped with a MicroUSB port, which improves theconvenience of the tool. It is used for reading/writingﬁles and reading analysis ﬁles that are saved in thecase of accidents or abnormalities. It can also be
used to write ﬁles saved in the USB memory.

3.4.3 Test Mode Function
Conventionally, when checking the function ofequipment, unnecessary outputs have been hardlocked by means of external auxiliary relays andoutput wire detachment. IPMAT ⅢS, however, has atest mode function that holds binary input/output
and transmission data and can suppress external
alarms and transmission outputs when inspecting
the equipment. By this mode setting, the equipment
can be inspected without any hardware measures.

4 Postscript
This paper introduced the features of IPMATⅢS developed as a successor model of IPMATⅡ/ⅡA. We are going to expand the application ofIPMAT ⅢS in the future. In the future the transmission system will be conﬁgured to comply with theIEC 61850 standard.

3.4.4 Setting File・Ethernet is the registered trademark of Fuji Xerox Co., Ltd.

Settings for each relay and transmission canbe made a setting ﬁle. When making a setting, con-・All product and company names mentioned in this paper are
the trademarks and/or service marks of their respective owners.

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