NM1 series plastic case circuit breaker

Product category:: Molded case circuit breaker
Product code:: P-272
Model:: NM1

Function & Use (Application Scenarios)

Distribution appliances and plastic case circuit breaker products are mainly suitable for rated insulation voltage of the circuit breaker to 800V (NM1-63 type is 500V), suitable for AC 50Hz, rated working voltage to 690V (NM1-63 type is 400V), rated working current

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Product highlights

Reliable overload protection
Short circuit protection capability
Engineering application adaptation
Stable and reliable operation
Easy system integration

Model

NM1

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Main Product Parameters

ClassificationswitchgearSecondary classificationMolded case circuit breaker

Product details

Function and purpose

This circuit breaker has a rated insulation voltage of 800V (NM1-63 type is 500V), is suitable for AC 50Hz, a rated operating voltage of 690V (NM1-63 type is 400V), and a rated operating current of 10A to 1250A in distribution network circuits. It is used to distribute electric energy and protect lines and power equipment from overload, short circuit, undervoltage and other faults.

Detailed parameters

Parameter table 1

240V/415V/690V

Parameter classification	Parameter item	Parameter value
4.1 Rating of circuit breaker (see table 2)	Model	NM1-63S
	Frame rating rated current (A)	63
	Rated operating voltage Ue(V)	240/415
	Rated insulation voltage Ui(V)	800
	Rated impulse withstand voltage Uimp (kV) 8	18/13/-
	Maintainable mechanical life (times)	20000
	Electrical life AC400V (times)	3000
	Number of poles	3, 4
	Arc distance (mm)	≤50
	Model	NM1-63H
	Frame grade rated current (A)	63
	Rated operating voltage Ue(V)	400
	Rated insulation voltage Ui(V)	500
	Rated impulse withstand voltage Uimp (kV)	8
	Rated ultimate short-circuit breaking capacity (kA) 240V/415V/690V	-/50+/-
	Rated operating short-circuit breaking capacity (kA) 240V/415V/690V	-/25+/-
	Maintainable mechanical life (times)	20000
	Electrical life AC400V (times)	3000
	Number of poles	2, 3, 4
	Arc distance (mm)	≤50
	Model	NM1-125S
	Frame rating rated current (A)	125
	Rated operating voltage Ue(V)	240/415/690
	Rated insulation voltage Ui(V)	800
	Rated impulse withstand voltage Uimp (kV)	8
	Rated ultimate short-circuit breaking capacity (kA) 240V/415V/690V	50/35/8
	Rated operating short-circuit breaking capacity (kA) 240V/415V/690V	30/18/4
	Maintainable mechanical life (times)	20000
	Electrical life AC400V (times)	3000
	Number of poles	2, 3, 4
	Arc distance (mm)	≤50
	Model	NM1-125H
	Frame rating rated current (A)	125
	Rated operating voltage Ue(V)	400/690
	Rated insulation voltage Ui(V)	800
	Rated impulse withstand voltage Uimp (kV)	8
	Rated ultimate short-circuit breaking capacity (kA) 240V/415V/690V	-/50/10
	Rated operating short-circuit breaking capacity (kA) 240V/415V/690V	-/25/5
	Maintainable mechanical life (times)	20000
	Electrical life AC400V (times)	3000
	Number of poles	2, 3, 4
	Arc distance (mm)	≤50
	Model	NM1-125R
	Frame rating rated current (A)	125
	Rated operating voltage Ue(V)	400/690
	Rated insulation voltage Ui(V)	800
	Rated impulse withstand voltage Uimp (kV)	8
	Rated ultimate short-circuit breaking capacity (kA) 240V/415V/690V	-/85/20
	Rated operating short-circuit breaking capacity (kA) 240V/415V/690V	-/42.5/10
	Maintainable mechanical life (times)	20000
	Electrical life AC400V (times)	3000
	Number of poles	3
	Arc distance (mm)	≤50
	Model	NM1-250S
	Frame rating rated current (A)	250
	Rated operating voltage Ue(V)	240/415/690
	Rated insulation voltage Ui(V)	800
	Rated impulse withstand voltage Uimp (kV)	8
	Rated ultimate short-circuit breaking capacity (kA) 240V/415V/690V	50/35/8
	Rated operating short-circuit breaking capacity (kA) 240V/415V/690V	30/18/4
	Maintainable mechanical life (times)	20000
	Electrical life AC400V (times)	3000
	Number of poles	2, 3, 4
	Arc distance (mm)	≤50
	Model	NM1-250H
	Frame rating rated current (A)	250
	Rated operating voltage Ue(V)	125, 160, 200, 225, 250
	Rated insulation voltage Ui(V)	400/690
	Rated impulse withstand voltage Uimp (kV)	8
	Rated ultimate short-circuit breaking capacity (kA) 240V/415V/690V	-/50/10
	Rated operating short-circuit breaking capacity (kA) 240V/415V/690V	-/25/5
	Maintainable mechanical life (times)	20000
	Electrical life AC400V (times)	3000
	Number of poles	2, 3, 4
	Arc distance (mm)	≤50
	Model	NM1-250R
	Frame rating rated current (A)	250
	Rated operating voltage Ue(V)	125, 160, 200, 225, 250
	Rated insulation voltage Ui(V)	400/690
	Rated impulse withstand voltage Uimp (kV)	8
	Rated ultimate short-circuit breaking capacity (kA) 240V/415V/690V	-/85/20
	Rated operating short-circuit breaking capacity (kA) 240V/415V/690V	-/42.5/10
	Maintainable mechanical life (times)	20000
	Electrical life AC400V (times)	3000
	Number of poles	3

Parameter table 2

Parameter classification	Parameter item	Parameter value
4.4 Instantaneous operating characteristics of distribution circuit breaker (see Table 5)	Frame rating rated current Inm(A)	63
	Rated current In(A)	10~63
	Short-circuit protection current setting method	Fixed
	Short-circuit protection current setting value li(A) And tolerance	10In, ±20%
	Unipolar short-circuit protection current action setting value li(A)	12In
	Tripping time (s)	<0.2
	Frame rating rated current Inm(A)	125
	Rated current In(A)	16~125
	Short-circuit protection current setting method	Fixed
	Short-circuit protection current setting value li(A) And tolerance	10In, ±20%
	Single-pole short-circuit protection current action setting value li(A)	12In
	Frame grade rated current Inm(A)	250
	Rated current In(A)	100~250
	Short-circuit protection current setting method	Fixed
	Short-circuit protection current setting value li(A) And tolerance	10In, ±20%
	Single-pole short-circuit protection current action setting value li(A)	12In
	Frame grade rated current Inm(A)	400
	Rated current In(A)	225~400
	Short-circuit protection current setting method	Fixed
	Short-circuit protection current setting value li(A) And tolerance	10In, ±20%
	Single-pole short-circuit protection current action setting value li(A)	12In
	Frame grade rated current Inm(A)	630
	Rated current In(A)	400~630
	Short-circuit protection current setting method	Fixed
	Short-circuit protection current setting value li(A) And tolerance	10In, ±20%
	Single-pole short-circuit protection current action setting value li(A)	12In
	Frame grade rated current Inm(A)	800
	Rated current In(A)	630~800
	Short-circuit protection current setting method	Fixed
	Short-circuit protection current setting value li(A) And tolerance	10In, ±20%
	Single-pole short-circuit protection current action setting value li(A)	12In
	Frame grade rated current Inm(A)	1250
	Rated current In(A)	800~1250
	Short-circuit protection current setting method	Fixed
	Short-circuit protection current setting value li(A) And tolerance	7In, ±20%
	Single-pole short-circuit protection current action setting value li(A)	10In
4.5 Instantaneous operating characteristics of circuit breaker for motor protection (see Table 6)	Frame rating rated current Inm(A)	63
	Rated current In(A)	10~63
	Short-circuit protection current setting method	Fixed
	Short-circuit protection current setting value li(A) And tolerance	12In, ±20%
	Unipolar short-circuit protection current action setting value li(A)	14In
	Tripping time (s)	<0.2
	Frame rating rated current Inm(A)	125
	Rated current In(A)	16~125
	Short-circuit protection current setting method	Fixed
	Short-circuit protection current setting value li(A) And tolerance	12In,±20%
	Single-pole short-circuit protection current action setting value li(A)	14In
	Frame grade rated current Inm(A)	250
	Rated current In(A)	100~250
	Short-circuit protection current setting method	Fixed
	Short-circuit protection current setting value li(A) And tolerance	12In,±20%
	Single-pole short-circuit protection current action setting value li(A)	14In
	Frame grade rated current Inm(A)	400
	Rated current In(A)	225~400
	Short-circuit protection current setting method	Fixed
	Short-circuit protection current setting value li(A) And tolerance	12In,±20%
	Single-pole short-circuit protection current action setting value li(A)	14In
	Frame grade rated current Inm(A)	630
	Rated current In(A)	400~630
	Short-circuit protection current setting method	Fixed
	Short-circuit protection current setting value li(A) And tolerance	12In,±20%
	Single-pole short-circuit protection current action setting value li(A)	14In
	Frame grade rated current Inm(A)	800
	Rated current In(A)	630~800
	Short-circuit protection current setting method	Fixed
	Short-circuit protection current setting value li(A) And tolerance	12In,±20%
	Unipolar short-circuit protection current action setting value li(A)	14In

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