NJL1 Series Residual Current Relay

Product category:: Protection Relay
Product code:: P-533
Model:: NJL1

Function & Use (Application Scenarios)

Relays, protective relays are mainly used in combination with AC contactors or circuit breakers to form leakage protection devices, and their main function is to provide indirect contact protection against life-threatening electric shocks. They are suitable for low-voltage distribution systems with directly grounded neutral points (380V/220V).

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Product highlights

Leakage current protection support
Engineering Application Compatibility
Stable and reliable operation
Easy system integration

Model

NJL1

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Main Product Parameters

CategoryRelay Protection and Automation DevicesSecondary CategoryProtective Relay

Product details

Function and Purpose

The NJL1 series residual current relay, combined with an AC contactor or circuit breaker, forms a residual current protection device. Its main function is to provide indirect contact protection against life-threatening electric shocks. It is suitable for low-voltage distribution systems with directly grounded neutral points (380V/220V), improving the safety of power grid operations.

Detailed Parameters

Parameter Category	Parameter Item	Parameter Value
Item	Model	NJL1-250
		NJL1-400
		NJL1-630
	Rated Operating Voltage	380V
		380V
		380V
	Rated Auxiliary Power Supply Voltage	220V
		220V
		220V
	Rated Frequency	50Hz
		50Hz
		50Hz
	Rated Current	250A
		400A
		630A
	Rated Residual Operating Current I △n	300mA/500mA Adjustable
		300mA/500mA Adjustable
		300mA/500mA Adjustable
	Rated Residual Non-Operating Current	150mA/250mA Adjustable
		150mA/250mA Adjustable
		150mA/250mA Adjustable
	Operating Time	I △n ≤0.3s; 2I △n ≤0.15s; 5I △n ≤0.04s; 10I △n ≤0.04s
	Reset Time	20s~60s
		20s~60s
		20s~60s
	Operating Characteristic Classification	AC Type
		AC Type
		AC Type
	Output Contact Rated Capacity	380 2A
		380 2A
		380 2A
	Output Contact Usage Category	AC-15
		AC-15
		AC-15
	Rated Short-Time Withstand Current	3000A
		4000A
		6300A

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