China OEM Rcd Mcb Circuit Exporter - Miniature Circuit Breaker (MCB) CJM2-125 – C&J

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China OEM Rcd Mcb Circuit Exporter - Miniature Circuit Breaker (MCB) CJM2-125 – C&J Detail:

Construction and Feature

High short-short capacity 10KA
Designed to protect circuit carrying big current up to 125A
Contact position indication
Used as main switch in household and similar installation
The price-quality ratio is very high

Specification

Standard			IEC/EN 60898-1
Pole No			1P,1P+N, 2P, 3P,3P+N,4P
Rated voltage			AC 230V/400V
Rated Current(A)			20A,25A,32A,40A,50A,63A,80A,100A,125A
Tripping curve			C, D
Rated short-circuit capacity(lcn)			10000A
Rated service short-circuit capacity(Ics)			7500A
Rated frequency			50/60Hz
Rated impulse withstand voltage Uimp			6kV
Connection terminal			Pillar terminal with clamp
Electro-mechanical endurance			Ins100=10000:n125=8000
Terminali Connection Height			20mm
Connection capacity			Flexible conductor 35mm²
			Rigid conductor 50mm²
Installation			On symmetrical DIN rail 35mm
			Panel mounting

Overload Current Protection Characteristics

Test	Tripping Type	Test Current	Initial State	Tripping timeor Non-tripping Time Provisior
a	Time-delay	1.05In	Cold	t≤1h(In≤63A) t≤2h(ln>63A)	No Tripping
b	Time-delay	1.30In	After test a	t<1h(In≤63A) t<2h(In>63A)	Tripping
c	Time-delay	2In	Cold	10s<t<60s(In≤63A) 20s<t<120s(In>63A)	Tripping
d	Instantaneous	8ln	Cold	t≤0.2s	No Tripping
e	lnstantaneous	12In	Cold	t<0.2s	Tripping

Working Principle of MCB

When an MCB is subject to continuous over-current, the bimetallic strip heats up and bends. An electromechanical latch is released when the MCB deflects the bi-metallic strip. When the user connects this electromechanical clasp to the working mechanism, it opens the microcircuit breaker contacts. Consequently, it causes the MCB to switch off and terminate the current flowing. The user should individually switch on the MCB to restore the current flow. This device guard against defects caused by excessive current, overload, and short circuits.

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B Curve Mcb