- The ERB1-125 series miniature circuit breakers is suitable for circuits with AC 50/60HZ,a rated voltage of 400V or a single-phase voltage of 230V,and a rated current of 100A and below.It is used for short circuit and overload protection for buildings and electrical equipment ,and can also used for infrequent line switching under normal circumstances.It can also be used as a disconnecting switch and for under -voltage protection and remote breaking for circuits .
 
The product features good -looking appearance ,small size ,light weight ,accurate current tripping and setting .Reliable operation ,high breaking capacity ,fast tripping ,rail mounting ,combined mode design .Combined with auxiliary contact ,alarm indication contact ,under -voltage trip unit ,shunt trip unit and other accessories ,it would meet the needs from various users .Its case and components adopt high flame -retardant and impact -resistant plastic materials ,featuring a long service life.
 
- Standards complied by this product: IEC60947-2, GB14048.2.

Main Technical Parameters

- Main type - The rated currents of the circuit breaker are 63A, 80A, 100A, 125A - The number of poles of the circuit breaker is divided as: unipole, two-pole, three-pole and four-pole. - The circuit breaker is fitted with a 35x7.5 standard mounting rail.

The rated values of the main circuit of the circuit breaker are shown in Table 1.

Table 1
Rated current(A)	Number of poles	Rated voltage(V)	Rated short circuit breaking capacity
			Expected current in the last test line(A)	Power factor
63,80,100,125	1,2,3,4	230/400	4000	0.45~0.50

The characteristics of over-current trip are shown in Table 2.

Table 2
Ambient air humidity	I/In	Expected result in the last test		Start status
		In≤63A	In>63A
30±2°C	1.05	Not trip within 1 hour	Not trip within 2 hours	Cold status starts
	1.30	Not trip within 1 hour	Trip within 2 hours	Hot status starts
	3.0	Release time>3s	Release time>5s	Hot status starts
-5～45°C	5.0~10.0(C)	Operate within≤0.1s		Cold status starts
	10.0~14.0(D)	Operate within≤0.1s

Ower frequency withstand voltage :After testing the resistance to heat and humidity, the circuit breaker should withstand a 2500V power frequency withstand test for 1 minute without arc-over or breakdown .
 
Mechanical and electrical life: the mechanical life of the circuit breaker is 4000times, in which the electrical life is 1500times .