NM2LC residual current protection circuit breaker

Function and purpose

NM2LC series residual current protection circuit breaker is suitable for AC 50Hz, rated voltage 400V, rated current up to 800A three-phase four-wire neutral point directly grounded (TT) distribution network. It is used to provide indirect contact protection against personal electric shock hazards, and can also protect lines or electrical equipment from overcurrent, short circuit, undervoltage, overvoltage, phase loss and power supply side zero interruption.

Detailed parameters

Parameter table 1

< td>0.5IΔn

Parameter classification	Parameter item	Parameter value
Product series	Specification model	NM2LC-125, NM2LC-250, NM2LC-400, NM2LC-630, NM2LC-W630, NM2LC-800
	Frame current Inm(A)	125, 250, 400, 630, 630, 800
	Number of poles	3P+N (N line is on the right side of the product)
	Rated current In(A)	50-63-80-100-125, adjustable; 100-125-140-160-180-200-225-250, adjustable; 200-225-250-315-350-400, adjustable; 315-350-400-500-630, adjustable; 250-315-350-400-450-500-560-630, adjustable; 315-350-400-450-500-560-630--700-800, adjustable
	Rated insulation voltage Ui (V)	1000
	Rated impulse withstand voltage Uimp(kV)	8
	Rated operating voltage Ue(V)	AC400, 50Hz
	Release type	Electronic (three-stage protection, electronically adjustable)
	Use category	A, A, B, B, B, B
	Breaking capacity code	H, M, H, M, H, M, M
	Rated ultimate short-circuit breaking capacity Icu (kA)	70, 50, 70, 50, 85, 65, 65, 65, 35
	Rated operating short-circuit breaking capacity Ics (kA)	50, 35, 50, 35, 65, 42, 65, 42, 50, 35
	Rated short-time withstand current Icw, 1s (kA)	1.5, 3, 5, 8, 8, 10
	Residual current operating characteristics	AC
	Rated residual operating current IΔn (mA)	Conventional products: 30/50/100/200/300/400/500/600/800/1000, adjustable, 30mA is non-delay, without reclosing function; new protocol products: 30/50/100/200/300/400/500/600/800/1000, adjustable, 30mA is non-delay, without reclosing function
	Rated residual current non-action value IΔno (mA)
	Residual current action time type	Delay type/non-delay type
	Breaking time (s)	Delay type: ≤0.5(IΔn); ≤0.2(2IΔn); ≤0.15(5IΔn, 10IΔn); Non-delay type: ≤0.3(IΔn); ≤0.15(2IΔn); ≤0.04(5IΔn, 10IΔn)
	Delay type limit non-driving time (s)	2IΔn: 0.06/2IΔn: 0.06, 0.1, 0.2 (new protocol product)
	Automatic reclosing time (s)	20-60
	Overvoltage protection value (V)	Setting value (240~300)±5% (conventional products)/(245~300)±2% ( New protocol products)
	Undervoltage protection value (V)	Setting value (145~200)±5% (conventional products )/(140~200)±2% (new protocol product)
Operating performance (times)	Power on	1500, 1000, 1000, 1000, 1000, 500
	Not powered	8500, 7000, 4000, 4000, 4000, 2500
	Total times	10000, 8000, 5000, 5000, 5000, 3000
Outline and installation dimensions	Width (W)	122, 142, 198, 198, 240, 280
	High (H)	150, 165, 257, 336, 350, 370
	Deep (D)	124, 136, 180, 180, 183.5, 186

Parameter table 2

< /tr>< tr>B< tr> td>< /tr>< /tr>4000

Parameter classification	Parameter item	Parameter value
Product series	Specification model	NM2LC-125Z
		NM2LC-250Z
		NM2LC -400Z
		NM2LC-630Z
	Frame current Inm(A)	125
		250
		400
		630
	Number of poles	3P+N (N line is on the left side of the product)
	Rated current In(A)	50-63 -80-100-125, adjustable
		100-125-140-160-180-200-225-250, adjustable
		200-225-250-315-350-400, adjustable
		315-350-400-500-630, adjustable
	Rated insulation voltage Uli(V)	1000
	Rated impulse withstand voltage Uimp(kV)	8
	Rated operating voltage Ue (V)	AC400, 50Hz
	Tripping device type	Electronic (three-stage protection, electronically adjustable)
	Use categories	A
		A
		B
	Rated ultimate short-circuit breaking capacity Icu(kA)	18
		18
		25
		35
	Rated operating short-circuit breaking capacity Ics (kA)	18
		18
		25
		35
	Rated short-time withstand current Icw, 1s (kA)	1.5
		3
		5
		8
	Residual current operating characteristics	AC
	Rated residual operating current IΔn (mA)	Conventional products: 30/50/100/200/300/400/500/600/800/1000, adjustable 30mA is non-delay, without reclosing function
	New protocol products:
	Rated residual current inaction value IΔno (mA)	0.5IΔn
	Residual current action time type	Delay type/non-delay type
	Breaking time (s)	Delay type: ≤0.5 (IΔn); ≤0.2 (2IΔn); ≤0.15 (5IΔn, 10IΔn)
		Non-delay type: ≤0.3(IΔn); ≤0.15(2IΔn); ≤0.04(5IΔn, 10IΔn)
	Delay type limit is not driven Automatic reclosing time (s)	2IΔn:0.06/2IΔn:0.06, 0.1, 0.2 (new protocol product)
	Automatic reclosing time (s)	20-60
	Overvoltage protection value (V)	Set value (240~300)±5% (conventional products)/(245~300)±2% (new protocol products)
	Ow Voltage protection value (V)	Set value (145~200)±5% (conventional products)/(140~200)±2% (new protocol products)
	Operation performance (times)	Power on: 150 0
		No power: 8500
		Total times: 10000
		Width (W): 122
		Height (H): 220
		Depth (D):120
		1000
		7000
		8000
		142
		240
		138
		1000
		5000
		198
		336
		180
		1000
		4000
		5000
		198
		336
		180