Jiangsu Acrel Electrical Manufacturing Co., LTD.
Jiangsu Acrel Electrical Manufacturing Co., LTD.
  • asj20 ld1a residual current relay
  • asj20 ld1a residual current relay

Acrel ASJ20-LD1A Residual Current Relay

ASJ series relays can be combined with low-voltage circuit breakers or low-voltage contactors to form a combined residual current action protector. It is mainly suitable for TT or TN system distribution lines with AC 50Hz and rated voltage of 400V and below to prevent damage caused by ground fault current. Equipment and electrical fire accidents, and can also be used to provide indirect contact protection against personal electrical shock hazards.

Video of ASJ20-LD1A Residual Current Relay

Parameters of ASJ20-LD1A Residual Current Relay

Technical parameter

Type A


Rated residual actioncurrent I△n


Non-driving time oflimitation △t


Rated residualnon-action current I△no



simple sinusoidal alternating current andpulsating direct current



Action error



output mode

one is the normal closing or opening,andthe other is for the transformation

contact capacity

AL1:8A250VAC5A 30VDC
AL2:6A250VAC5A 30VDC

reset mode

the on-the-spot one,the long-distance oneand the automatic one

Power supply

voltage range

AC110V、AC220V、DC85-270Vpermissible error±10%)

power dissipation


Power frequency withstand voltage

The effective value of alternating current between the power supply,input and output: 2kV/Imin

Under thenormaloperation


operating temperature:-20℃~+55℃storage temperature:-30℃~+70℃


≤95%RH,with moisture condensation,and corrosive gas place

height above sea level


class of pollution

Grade three

installation category

Type III

Benefits of ASJ20-LD1A Residual Current Relay

  • The measurement of A-type residual current
  • The streamer display of current percentage
  • The setting of rated residual action current
  • The setting of non-driving time of limitation
  • Two-pair relay output
  • Possessing the function of on-the-spot and long-distance testing and resetting

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    No.5 Dongmeng Road, Nanzha Street, Jiangyin City, Jiangsu Province, China.