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The molded case circuit breaker can protect the lines and equipment in distribution lines when overload,
short circuit and undervoltage occur, and can also provide overload, short circuit and undervoltage
protection for infrequent starting of motors.
Grade of shell frame
NXM series molded case circuit breakers: 63A, 125A, 160A, 250A, 400A, 630A, 800A,
1000A、1250A、1600A
The rated working voltage UE (AC): 230v/240v, 400V/415V, 500V, 690V(63A,
125A shell frame has no 690V, and 1250A/1600A shell frame has no 500V)
Code of breaking capacity: s and h
Number of poles: 2P, 3P, 4P(2P is only applicable to shell products of 250A and below)
Release types: electromagnetic, thermomagnetic and thermally adjustable magnetic fixed
Installation mode: fixed type and plug-in type
NXM-160-S P /4 300
NXM: Product code NXM series molded case circuit breaker
160: current grade code of shell frame 63a 125a 160a 250a 400a 630a 800a 1000a 1250a 1600a
S: breaking capacity code s 25kah: 50ka (63a 125a) s 36kah: 50ka (160a 250a)
S 50kA H:70kA(400A 630A 800A 1000A 1250A 1600A)
P: operation mode code No code handle direct operation P electric operation Z: rotating handle operation
4. Number of poles Code 2: Two poles 3: Three poles 4: Four poles
The first digit of 300 release mode and internal accessory code represents release mode 2: electromagnetic type
3: Thermomagnetic
(The function of thermal overload alarm without tripping can only be selected 3) The second and third digits
are internal accessory codes
Chint Circuit Breaker NXM-400H/4300
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