Miniature Circuit Breaker 6kA 63A KNB5-63M3

Miniature Circuit Breaker 6kA 63A KNB5-63M3

KNB5-63 series Miniature Circuit Breaker is nice in appearance, reasonable in structure, sound in feature and high in breaking capacity. Installed with standard din rail, it is convenient and easy in usage. It is mainly used in the line of AC 50/60Hz, rated working voltage to 240V, and rated current to 63A as protection against overload and short-circuit. It can be used as infrequent on-and-off operation and changeover. It complies with standard of IEC/EN60898-1 and IEC/EN60947-2.

Technical parameter

Frame class	63A
Rated working voltage	240/415V
Rated frequency	50/60Hz
Rated working current	1,2,3,4,5,6,10,16,20,25,32,40,50,63A
Making and breaking capacity	10kA,15kA
Release type	B, C, D
Poles	1, 2, 3, 4P
Mechanical life	10000
Electric life	4000

The over-current tripping unit protection feature

Sequence NO.	Release	Test current I/In	Start state	Tripping time	Expected result
1	B、C、D	1.13In	Cold state	t≤1h	Not tripping
2	B、C、D	1.45In	Start right after the serial NO. 1 test	t<1h	Tripping
3	B、C、D	2.55In	Cold state	1s<t<60s(In≤32A) 1s<t<120s(In>32A)	Tripping
4	B、C、D	3In 5In 10In	Cold state	t≤0.1s	Not tripping
5	B、C、D	5In 10In 20In	Cold state	t<0.1s	Tripping