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Hitachi Industrial Components & Equipment


Classification Types and ratings of trip relays
TYPE 60Hz LS6 LF6 LN6 *1
50Hz LS5 LF5 LN5 *1
Application For industry For industry For industry
Possible number of ACB poles 3,4P 3,4P 3P
Operating voltage AC/DC 110V-220V AC/DC 110V-220V AC/DC 110V-220V
Operating characteristics Long-time delay (L)
Short-time delay (S)
Instantaneous time delay (I)
Ground fault (G)
Pre-alarm (P)
Steeing current(A) In =…×In max 0.4-0.5-0.6-0.7-0.8-0.9-1.0
Continuous current(A) Ic =…×In 0.6-0.7-0.8-0.85-0.9-0.95-1.0
Long-time delay (L)
(Error tolerance : ±10%)
Trip current (A) IL =…×Ic 1.5
Trip time (sec) LTD 15-30-60-120-240-480
Short-time dealy (S)
(Error tolerance : ±15%)
Trip current (A) Is =…×In 2-3-4-6-8-10-OFF
Trip time (sec) STD 0.05-0.1-0.2-0.3-0.4-0.5
Instantaneous time delay (I)
(Error tolerance : ±20%)
Trip current (A) Ii =…×In 4-6-8-10-12-16-OFF
Trip time (sec) INST 0.025 under *2
Ground fault (G)
(Error tolerance : ±20%)
Trip current (A) Ig =…×In Max 0.1-0.2-0.3-0.4-0.5-OFF
Inp =…×In Max 0.5-1.0-OFF *3
Trip time (sec) GTD 0.1-0.3-0.5-0.7-1.0-1.5-3.0
Pre-alarm (P)
(Error tolerance : ±10%)
Trip current (A) Ip =…×Ic 0.7-0.8-0.9-0.95-1.0-OFF
Trip time (sec) PAL =…×LTD 0.5(setting Ip 1.0), Operating time : Half of the long time inverse time


For type LN5 and LN6, please use Neutral CT (output : 5A)in case of using 3P ACB in 3phase 4wire circuit.
In case of short circuit accident, instantaneous operation time of OCR is under 15ms.
Inp is a function for neutral protection. It protects neutral phase in 4 pole ACB against over current.

Power consumption of trip relay

operational Voltage OCR - II
AC/DC 110-220V 5VA


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