NM8N series plastic case circuit breaker

Product category:: Molded case circuit breaker
Product code:: P-269
Model:: NM8N

Function & Use (Application Scenarios)

Distribution appliances and plastic case circuit breaker products are mainly suitable for making, breaking and sustaining circuits with AC 50/60Hz, rated voltage AC690V and below, and DC system rated voltage DC1000V and below, rated current 16A to 1600A.

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Product highlights

Reliable overload protection
Short circuit protection capability
Strong breaking ability
Easy to install and maintain
Modular design

Model

NM8N

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Main Product Parameters

ClassificationswitchgearSecondary classificationMolded case circuit breaker

parametersOperating breaking capacity: Ics=100%Icu; rated insulation voltage: 1000V; rated operating current: 16-1600A; operating ambient temperature: -40°C~+70°CAdvantages/core features01 Safe and reliable; the breaking capacity can reach up to 150kA, Ics=100%Icu, and the fault current can be cut off safely; the insulation voltage can reach AC1000V, making operation more reliable in high-altitude environments; 02 Excellent performance; the rated impact withstand voltage is up to 12kV, with higher impact performance; the working environment temperature is -40°C~+70°C, adapting to more harsh environments; 03 Easy to use; electronic two-component motor protection solution can reduce cabinet design space and make installation more convenient; internal accessories can be installed in a modular manner for easy maintenance and replacement

Product details

Function and use

NM8N series plastic case circuit breakers are suitable for making, breaking and carrying rated current in circuits with AC 50/60Hz, rated voltage AC690V and below, and DC system rated voltage DC1000V and below, rated current 16A to 1600A, and can reliably protect lines and electrical equipment in the event of overload, short circuit or undervoltage. It can also be used as infrequent starting and overload, short circuit, and undervoltage protection of the motor.

Detailed description

Parameters:
Operating breaking capacity: Ics=100%Icu
Rated insulation voltage: 1000V
Rated operating current: 16-1600A
Using ambient temperature: -40°C~+70°C

Advantages/core functions:
01 Safe and reliable
The breaking capacity can reach up to 150kA, Ics=100%Icu, and the fault current can be cut off safely

The insulation voltage can reach AC1000V, and the operation is more reliable in high altitude environments
02 Excellent performance
The rated impact withstand voltage is up to 12kV, and the impact performance is higher

The working environment temperature is -40°C~+70°C, adaptable to more harsh environments
03 Easy to use
The electronic two-component motor protection solution can reduce the cabinet design space and make installation more convenient

The internal accessories realize modular installation for easy maintenance and replacement

Detailed parameters

Parameter classification	Parameter item	Parameter value
System parameter	Rated operating current In(A),40℃	125, 250, 400, 630, 800, 1600
	Electronic	1.5-2.5-6-10-12.5-16-20-25-32-40-50-63-80-100-125, 125-160-180-200-225-250, 250-315-350-400, 400-500, 500-630-700-800, ——
	Thermomagnetic	16-20-25-32-40-50-63-80-100-125, 125-160-180-200-225-250, 250-315-350-400, 400-500-630, 500-630-700-800, 800-1000-1250-1600
		32-63-100-125, 400-630, 630-800, 800-1000-1250-1600
Electrical properties	Rated insulation voltage Ui (V)	1000, 1000, 1000, 1000, 1000, 1000
	Rated impulse withstand voltage Uimp (V)	8, 8, 12, 12, 12, 12
	Rated operating voltage Uimp (V), AC 50/60Hz	380/400/415,440,500,660/690, 380/400/415,440,500,660/690, 380/400/415,440,500,660/690, 380/400/415,440,500,660/690, 380/400/415,440,500,660/690, 380/400/415,440,500,660/690
Analytical capability code	1P	C, S, Q, H, R
	2P	C, S, Q, H, R
	3P	C, S, Q, H, R
	4P	C, S, Q, H, R
Number of poles	AC220/230/240V	36, 50, 36, 50, 36, 50, 36, 50, 36, 50, 36, 50
	AC380/400/415V	36, 50, 70, 100, 150, 36, 50, 70, 100, 150, 36, 50, 70, 100, 150, 36, 50, 70, 100, 150, 36, 50, 70, 100, 150, 36, 50, 70, 100, 150
	AC440V	36, 50, 70, 100, 150, 36, 50, 70, 100, 150, 36, 50, 70, 100, 150, 36, 50, 70, 100, 150, 36, 50, 70, 100, 150, 36, 50, 70, 100, 150
	AC500V	25, 40, 40, 50, 10, 25, 40, 40, 50, 10, 25, 40, 40, 50, 10, 25, 40, 40, 50, 10, 25, 40, 40, 50, 10, 25, 40, 40, 50, 10
	AC660/690V	6, 8, 8, 10, 6, 8, 8, 10, 6, 8, 8, 10, 6, 8, 8, 10, 6, 8, 8, 10, 6, 8, 8, 10, 6, 8, 8, 10, 6, 8, 8, 10
Rated ultimate short-circuit breaking capacity Icu(A)		36, 50, 36, 50, 36, 50, 36, 50, 36, 50, 36, 50
Rated operating short-circuit breaking capacity Ics(A)		36, 50, 70, 100, 150, 36, 50, 70, 100, 150, 36, 50, 70, 100, 150, 36, 50, 70, 100, 150, 36, 50, 70, 100, 150, 36, 50, 70, 100, 150
Rated residual operating current IΔn (A)		1032A, 632A, 100A, 160A, 3(250A)
Comply with standards		IEC/EN 60947-2, GB/T 14048.2, IEC/EN 60947-2, GB/T 14048.2, IEC/EN 60947-2, GB/T 14048.2, IEC/EN 60947-2, GB/T 14048.2, IEC/EN 60947-2, GB/T 14048.2, IEC/EN 60947-2, GB/T 14048.2
Use Category	A	A, A (thermal magnetic type) (electronic type), A (thermal magnetic type) (electronic type), A (thermal magnetic type) (electronic type), A (thermal magnetic type) (electronic type)
Working environment temperature	-40℃～+70℃	-40℃～+70℃, -40℃～+70℃, -40℃～+70℃, -40℃～+70℃, -40℃～+70℃
Isolation function		None, none, none, none, none
Arc flashover distance	0	0, 0, 0, 0, 0
Mechanical life (times)	Maintenance-free	25000, 25000, 30000, 20000, 20000, 10000
		AC415Vjn 10000, 8000, 8000, 8000, 10000

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