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Hitachi Industrial Components & Equipment


Classification Types and ratings of trip relays
TYPE 60Hz N*6 C*6 P*6 M*6
50Hz N*5 C*5 P*5 M*5
Application For industry For industry For generator protection For generator protection
Possible number of ACB poles 3,4P 3,4P 3,4P 3,4P
Operating voltage 1 AC/DC 110V-220V AC/DC 110V-220V AC/DC 110V-220V AC/DC 110V-220V
2 DC24V DC24V DC24V DC24V
4 DC48V DC48V DC48V DC48V
Communication protocol RS 485 RS 485
Protocol DNP 3.0 DNP 3.0
Transmission speed 9600 bps 9600 bps
Operating characteristics Long-time delay (L)
Short-time delay (S)
Instantaneous time delay (I)
Ground fault (G)
Pre-alarm (P)
Rated current (A) In =…×In Max. For industry : 0.2-0.3-0.4-0.5-0.6-0.7-0.8-0.9-1.0
For generator protection : 0.2-0.3-0.4-0.5-0.6-0.7-0.8-0.9-1.0
Continuous current (A) Ic =…×In 0.6-0.65-0.7-0.75-0.8-0.85-0.9-0.95-1.0
Long-time delay (L)
(Error tolerance : ±10%)
Trip current (A) IL=…×Ic 1.5
Trip time (sec) LTD For industry : 15-20-25-30~465-470-475-480(Steps:5sec)
For generator protection : 1.5-2.0-2.5-3.0~46.5-47.0-47.5-48.0(Steps:0.5sec)
Short-time delay (S)
(Error tolerance : ±15%)
Trip current (A) Is =…×In 1.5-2-3-4-5-6-7-8-9-10-no(Steps : 0.5)
Trip time (sec) STD 0.05-0.06~0.49-0.5(Steps : 0.01sec)
Instantaneous time delay (I)
(Error tolerance : ±15%)
Trip current (A) Ii =…×In 4000A under : 2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-no(Steps : 1)
5000A over : 2-3-4-5-6-7-8-9-10-11-12-no(Steps : 1)
Trip time (sec) INST 0.025 under (Note)
Ground fault (G)
(Error tolerance : ±20%)
Pre-alarm (P)
(Error tolerance : ±10%)
Trip current (A) Ig =…×In max
Inp =…×In max
3 pole : 0.2-0.3-0.4-0.5-0.6-0.7-0.8-0.9-1.0-no(Steps : 0.1)
4 pole : 0.5-0.6-0.7-0.8-0.9-1.0-no(Steps : 0.1)
Trip time (sec)
Trip current (A)
GTD 0.1-0.2-0.3~2.8-2.9-3.0 (Step : 0.1sec)
Ip =…×Ic 0.7-0.8-0.9-1.0
Trip time (sec) PAL =…×LTD 0.5(setting Ip 1.0), Operating time : Half of the long time invers time


In case of short circuit accident, instantaneous operation time of OCR is under 15ms.

Power consumption of trip relay

Operational voltage OCR - III
AC/DC 110-220V 5VA
DC 24V 5VA
DC 48V 5VA

Trip relay type selection

Trip relay type selection

N Communication function NO (For industry)
C Communication function YES (For industry)
P Communication function NO (For generator protection)
M Communication function YES (For generator protection)
Operational voltage
1 AC/DC 110-220V
2 DC 24V
4 DC 48V
6 60Hz
5 50Hz

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