New product
MULTI-FUNCTIONAL PROTECTIVE RELAY
FOR HIGH/LOW-VOLTAGE CIRCUIT BREAKER

PRS-1H series

Catalogue No.

’21–P79E

The TemTrip PRO PRS-1H series of multi-functional protective relays for high or low-voltage circuit
breakers display the load current pick-up or tripping with LEDs, and display circuit information suchas phase current and line voltage on the LCD. There are three types available: generator protection,
feeder circuit protection, and transformer protection.
Specifications

Main features
・Uses a color graphical LCD24V DC / 110V DC

Control voltage
Power consumption

5VA

External dimensions

W196 × H146 × D163.6 (including the terminals on the back)(mm)

Operating temperature-10℃ ～ +55℃

Storage temperature-25℃ ～ +75℃

The display screen features a color graphical LCD thatis 5-times larger than the screens of previous models forenhanced visibility.

95% or lower (no condensation)

Humidity

IEC60255-8

Applicable standards

Measurement / event indication function
Presence / absence
Function

Measurement /event indication
function

For generator
protection

For feeder
circuit protection

For transformer
protection

Current, voltage, electric power, frequency, power factor

○

○

○

I/O state (contact)

○

○

○

Harmonic measurement

△

△

△

Trip event log (100 events)

○

○

○

Alarm event log (100 events)

○

○

○

Event log (200 events)

○

○

○

○

△

○

Monitoring function (4 to 20mA)

TemTrip2 (Current type)○ : Standard, △ : Optional

Protection/warning functions, etc.
For generator
protection

For feeder
circuit protection

For transformer
protection

51

○

○

○

50

○

○

○

50

○

○

○

27

○

○

○

59

○

○

○

32R

○ーー

Ground fault overvoltage protection (OVGR)

64○○

○

Directional ground fault protection (DGR)

67G

○

○

○

Differential current protection (DIFF)

87

○ー○

46

○

○

○

81U

○ーーLong time-delay tripping (LT)
Short time-delay tripping (ST)Instantaneous tripping (INST)
Undervoltage protection (UV)

＊3
＊3
＊3
＊1

Overvoltage protection (OV)
Reverse power protection (RP)Protectivefunction＊3

Negative phase sequence current protection (UB)
Underfrequency detection (UF)Alarmfunction
Operation
indication
function

Presence / absence

ANSI / IEEE
protectivedevice number

Function＊1

Overfrequency detection (OF)

81O

○ーー

Voltage establishment detection

84

○ーー

External tripー○○○Arc detectionー△△

△

＊3

＊3

Pre-trip alarm (PTA)

51P

○

○

○

Pre-trip alarm 2 (PTA2)

51P

○ーー

System alarm (SYS)

○

○

○

LED indicators, liquid crystal display (LCD),
display and contact output

○

○

○

○

△

○

Monitoring function (4 to 20mA)
Communication function＊2

Control power supply

△

△

△

Required

Required

Required○ : Standard, △ : Optional＊ 1 : Activated with auxiliary switch input terminals a and c short-circuited.
＊ 2 : The communications protocol is Modbus RTU.
＊ 3 : Capable of double settings. Two settings can be configured for each item,
which can be switched by feeding a signal to input terminal cc-c.

1This also allows device states to be checked visually.
ONOFFONOFF

CB state

Earthing switch
statePower monitoringstate ＊１
Double setting
stateVoltage
establishment
PMstate ＊１ DS
Connection
PMtypeGPM
DSG

PMDS

G
OperatingDSPM

G
Non-operating
DSPMDSPMDS

Protective function
setting 2 selectedPMGG

Undetected

Being detected

Established(Blinking in green)(Lit in green)

PMDSGPMDSGGGenerator

MotorTransformer

GM

PMDSGGPMDSPM
DS

Protective function
setting 1 selectedPMDS＊ 1 : Only displayed for generator protection.

DS・Easy wiring・Includes arc detection function (optional)

・Includes communication function (optional)

All input and output terminals use connectors as theconnection method, making wiring much easier thanprevious models.

Arcing due to internal short circuits, circuit breaks or othercauses are detected with an optical device to trigger anoutput. This allows issues that cannot be detected withcurrents or voltages to be identified much faster.

The communications function allows for transmission andcentralized management of measured values or historical
data. Modbus RTU is used as the communications
protocol for easier system development.

External dimensions【Front view】【Side view】

133

161.5

【Rear view】【Panel cutout dimensional drawing】

Ordering

PRS – 1H – □ – □ – □ – □ – □NNo options

M

Monitoring function(4 to 20mA) ＊ 1

CCommunication function

HHarmonic measurement
function

AArc protection function

1

CT rated current : 1A5CT rated current : 5A

A1

Rated voltage Vn : 110V AC

A2Rated voltage Vn : 220V ACGFor generator protection

H

Control power supply : 110V DCF

For feeder circuit

L

Control power supply : 24V DCT

For transformer protection＊ 1：Standard in models for generator protection and transformer protection.

2

Wiring diagram

For generator protection

CT4
CT5EVT
CT6GDn Dn2 Dc DB Dn1 DAccear

reTC

UA

ca

UB

UC

Un

Y1

Y2C+C-Cc

01 02A-A1A2A3

A4Arc detection

Power supply（+）
TS1

KACT1n1TE1KBTS2CT2

PRS-1HKc

CT3TE2n2TG

SHTPower supply（-）

nZ1

ZCTZ2FG01020304

S0(-) S1(+) P0(-) P1(+)

123456789101112 1314151617181920212203 04RST

Signal input terminal
Terminal numbers
KA-n1
KB-n1
KC-n2
DA-n1
DB-n1
DC-n2
Z1-Z2
a-c
Tc-c
re-c
ear-c
cc-c
UA,UB,UC
Y1-Y2
O1,O2,O3,O4

3

Power input terminal
Terminal nameTerminal numbers

Protection:
overcurrent detection CTS0( - ) – S1(+)
P0( - ) – P1(+)

Terminal nameProtectivefunction
Monitoring
function

24V DC, 110V DC
24V DC, 110V DC

CT for differential
current protection
ZCT
Auxiliary switch input
External trip signal input
Reset command input
Earthing switch signal input
Double setting switch input
Rated voltage input
Zero phase voltage input
Monitoring :Current measurement

Signal output terminal
Terminal numbers

Terminal nameA1 – A-Output for monitoring function(4-20mA output 4 channels)＊ Select from current / voltage /active power / reactive power /frequency / power factor

A2 – AA3 – AA4 – A-

Operation cause and alarm contact output terminal
Terminal
Terminal namenumbers
Operation signal output
1–2＊ Operation signal output selection
Long time-delay tripping (LT/LT2),
3–4
Short time-delay tripping (ST/ST2),
Instantaneous tripping (INST/INST2),
Negative phase sequence current protection (UB),
5–6
Directional ground fault (DGR),
Ground fault overvoltage (OVGR),
7–8
Undervoltage (UV),
Overvoltage (OV),
Differential current (DIFF),
9 – 10
Reverse power (RP),
Underfrequency (UF),Overfrequency (OF),11 – 12System alarm (SYS),
Remote trip (RT),
13 – 14
Arc detection (ARC)
PTA operation signal output 1 (automatic reset)
PTA operation signal output 2 (automatic reset)
Lockout operation signal output
Self-diagnosis for monitoring function
21 – 22and protective function
TE1 – TS1 Trip output signal 1 (Pulse output)
TE2 – TS2 Trip output signal 2 (Pulse output)
C+
Communication signal output (+)
CCommunication signal output ( - )CcCommunication signal output (COMMON)
Arc detection Dedicated connector
15 – 16
17 – 18
19 – 20

Wiring diagram

For feeder circuit

EVTccearreTC

UAcaUBUC

Un

Y1

Y2C+C-Cc

01 02

A-A1A2A3A4

Arc detection

Power supply（+）
TS1KACT1n1

TE1KB

TS2CT2

PRS-1HKc

CT3TE2n2TG

SHT
Power supply（-）

nZ1

ZCTZ2
FG010203

04

S0(-) S1(+) P0(-) P1(+)

123456789101112 131415161718

1920212203 04

RST

Signal input terminal
Terminal numbers
KA-n1
KB-n1
KC-n2
Z1-Z2
a-c
Tc-c
re-c
ear-c
cc-c
UA,UB,UC
Y1-Y2
O1,O2,O3,O4

Power input terminal
Terminal nameTerminal numbers

Protection:
overcurrent detection CT

S0( - ) – S1(+)

ZCT
Auxiliary switch input
External trip signal input
Reset command input
Earthing switch signal input
Double setting switch input
Rated voltage input
Zero phase voltage input
Monitoring :Current measurement

P0( - ) – P1(+)

Terminal nameProtectivefunction
Monitoring
function

24V DC, 110V DC
24V DC, 110V DC

Signal output terminal
Terminal numbers

Terminal nameA1 – A-Output for monitoring function(4-20mA output 4 channels)＊ Select from current / voltage /active power / reactive power /frequency / power factor

A2 – AA3 – AA4 – A-

Operation cause and alarm contact output terminal
Terminal
Terminal namenumbers
Operation signal output
1–2＊ Operation signal output selection
3–4
Long time-delay tripping (LT/LT2),
Short time-delay tripping (ST/ST2),
5–6
Instantaneous tripping (INST/INST2),
Negative phase sequence current protection (UB),
7–8
Directional ground fault (DGR),
Ground fault overvoltage (OVGR),
9 – 10Undervoltage (UV),
Overvoltage (OV),
11 – 12System alarm (SYS),
Remote trip (RT),
13 – 14
Arc detection (ARC)
PTA operation signal output (automatic reset)
Spare terminal
Lockout operation signal output
Self-diagnosis for monitoring function
21 – 22and protective function
TE1 – TS1 Trip output signal 1 (Pulse output)
TE2 – TS2 Trip output signal 2 (Pulse output)
C+
Communication signal output (+)
CCommunication signal output ( - )CcCommunication signal output (COMMON)
Arc detection Dedicated connector
15 – 16
17 – 18
19 – 204

Wiring diagram

For transformer protection

CT4CT5EVTCT6TR

Dn Dn2 Dc DB Dn1 DAccear

reTC

UAcaUBUC

Un

Y1

Y2C+C-Cc

01 02

A-A1A2A3A4Arc detection

Power supply（+）
TS1KACT1n1TE1KB

TS2CT2

PRS-1HKc

CT3TE2n2TG

SHT
Power supply（-）

nZ1

ZCTZ2
FG

0102

03

04

S0(-) S1(+) P0(-) P1(+)

123456789101112 13

1415

16

1718

1920

212203 04

RST

Signal input terminal
Terminal numbers
KA-n1
KB-n1
KC-n2
DA-n1
DB-n1
DC-n2
Z1-Z2
a-c
Tc-c
re-c
ear-c
cc-c
UA,UB,UC
Y1-Y2
O1,O2,O3,O4

Power input terminal
Terminal nameTerminal numbers

Protection:
overcurrent detection CT

S0( - ) – S1(+)
P0( - ) – P1(+)

Terminal nameProtectivefunction
Monitoring
function

24V DC, 110V DC
24V DC, 110V DC

CT for differential
current protection
ZCT
Auxiliary switch input
External trip signal input
Reset command input
Earthing switch signal input
Double setting switch input
Rated voltage input
Zero phase voltage input
Monitoring :Current measurement

Operation cause and alarm contact output terminal
Terminal
Terminal namenumbers
1–23–4
5–6
7–8

Signal output terminal
Terminal numbers

Terminal nameA1 – A-Output for monitoring function(4-20mA output 4 channels)＊ Select from current / voltage /active power / reactive power /frequency / power factor

A2 – AA3 – AA4 – A-

9 – 10
11 – 12
13 – 1415 – 16
17 – 18
19 – 20
21 – 22

Operation signal output＊ Operation signal output selection
Long time-delay tripping (LT/LT2),
Short time-delay tripping (ST/ST2),
Instantaneous tripping (INST/INST2),
Negative phase sequence current protection (UB),
Directional ground fault (DGR),
Ground fault overvoltage (OVGR),
Undervoltage (UV),
Overvoltage (OV),
Differential current (DIFF),
System alarm (SYS),
Remote trip (RT),
Arc detection (ARC)
PTA operation signal output (automatic reset)
Spare terminal
Lockout operation signal output
Self-diagnosis for monitoring function
and protective function
Trip output signal 1 (Pulse output)
Trip output signal 2 (Pulse output)
Communication signal output (+)
Communication signal output ( - )Communication signal output (COMMON)

TE1 – TS1TE2 – TS2
C+CCc
Arc detection Dedicated connector

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SUCURSAL EN ESPA— A(Spain)

TERASAKI ELECTRIC (EUROPE) LTD.
FILIALE ITALIA(Italy)

TERASAKI Global Network

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(HeadQuarters,Japan)
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(Malaysia)

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(Singapore)

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(Brazil)

Since 1971 when we established TERASAKI ELECTRICEurope, our first overseas subsidiary, in the UK, we haveassembled a global network of 10 overseas subsidiaries and72 agents to provide sales and technical supports toTERASAKI DO BRASIL LTDA.
TERASAKI CIRCUIT
customersworldwide.
BREAKERS (S) PTE. LTD.
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(Singapore)(Brazil)

Since 1971 when we established TERASAKI ELECTRIC
Europe, our first overseas subsidiary, in the UK, we haveassembled a global network of 10 overseas subsidiaries and72 agents to provide sales and technical supports tocustomers worldwide.

Safety Notice
TERASAKI ELECTRIC(SHANGHAI) CO., LTD.
(China)TERASAKIELECTRIC
Carefully readinstruction
manual to ensure proper installation,(CHINA) LTD.
(China)connection, operation, handling and maintenance of the product.

Safety Notice
Carefully read instruction manual to ensure proper installation,connection, operation, handling and maintenance of the product.

Head Office: 6-13-47 Kamihigashi, Hirano-ku, Osaka 547-0002, Japan
Circuit Breaker Division: 6-13-47 Kamihigashi, Hirano-ku, Osaka 547-0002, JapanTEL+81-6-6791-2763
FAX+81-6-6791-2732
int-sales@terasaki.co.jp
http://www.terasaki.co.jp/APR. 2017
2021
JAN.

Catalogue No.

’17–!65E’21-P79E

Ratings and specifications are subject to change without notice.

Head Office: 6-13-47 Kamihigashi, Hirano-ku, Osaka 547-0002, Japan
Circuit Breaker Division: 6-13-47 Kamihigashi, Hirano-ku, Osaka 547-0002, JapanTEL+81-6-6791-2763