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Hitachi Industrial Components & Equipment

External configuration

External configuration

No The name of knob Mode Setting step
1 Rated current In (0.4-0.5-0.6-0.7-0.8-0.9-1.0)×In Max
2 Continuous current Ic (0.6-0.7-0.8-0.85-0.9-0.95-1.0)×In
3 Long-time
delay tripping time
LTD 15-30-60-120-240-480 sec
4 Short-time
delay tripping current
Is (2-3-4-6-8-10-OFF)×In
In OCR trip operation,"STD" LED is turned 'on'
5 Short-time
delay tripping time
STD 0.05-0.1-0.2-0.3-0.4-0.5 sec
6 Instantaneous-time
delay trpping current
Ii (4-6-8-10-12-16-OFF)×In
In OCR trip operation,"INST" LED is turned 'on'
7 Pre-alarm current Ip (0.7-0.8-0.9-0.95-1.0-OFF)×Ic
In OCR trip operation,"PAL" LED is turned 'on'
8 Ground fault current Ig (0.1-0.2-0.3-0.4-0.5-OFF)×In Max
In OCR trip operation,"GTD" LED is turned 'on'
Inp * (0.5-1.0-OFF)×In Max
9 Ground fault time GTD 0.1-0.3-0.8-1.5-3.0 sec
Inp is a function for neutral protection. It protects neutral phase in 4 pole ACB from over current.

LED of the trip indicator and contact

LED Contact Kinds of tripping characteristics
LTD T1— Long-time delay tripping indicator
STD T2— Short-time delay tripping indicator
INST T3 Instantaneous-time delay tripping indicator
GTD T4 Ground fault tripping indicator
PAL T5 Pre-alarm indicator
RUN When the breaker closed(I, ON),"RUN" LED turn on and off continuously
PICK UP -Over than 105% of the setting current (In) : LED turn on and off
-Over than 120% of the setting current (In) : LED turn off

Formation of output terminal

Type of contact OCR-II
Control power Common R+
AC/DC 110-220V R2-
Pre-alarm AL1+, AL1-
AL2+, AL2-
Tripping type Common T0
Long-time T1-
Short-time T2-
Instantaneous T3
Ground fault T4
pre-alarm T5

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