The photo of the miniature circuit breaker(MCB) is as follows:
The first line: CMTB1-63A indicates that the case current of this miniature circuit breaker is 63A. The case current is the maximum value of the rated current series of this miniature circuit breaker.
Second line: C20 indicates that the tripping type of this miniature circuit breaker is C, which is suitable for driving general types of loads; 25 indicates that the rated current of this miniature circuit breaker is 25A.
The third line: indicates that the rated voltage of this miniature circuit breaker is AC 240V/415V
The fourth line: Indicates the International Electrotechnical Commission standard that this miniature circuit breaker follows.
The fifth line: indicates that the frequency of this miniature circuit breaker is 50Hz/60Hz
The sixth line: indicates that the rated limit short-circuit breaking capacity of this miniature circuit breaker is 3000A.
Symbols on the right miniature circuit breaker panel:
This picture tells us that this miniature circuit breaker is a thermal-magnetic circuit breaker, in which the thermal release is used for overload protection and the magnetic release is used for short-circuit protection.
The following figure is the internal structure of the miniature circuit breaker:
When the short-circuit current is greater than or equal to the ultimate short-circuit breaking capacity, the circuit breaker can effectively perform the breaking operation, but the circuit breaker is damaged after the breaking is completed and must be replaced; when the short-circuit current is less than or equal to the operating short-circuit breaking capacity, the circuit breaker It can effectively perform the breaking operation and can continue to be closed for use after breaking.
The operating short-circuit breaking capacity Ics must be less than or equal to the ultimate short-circuit breaking capacity Icu. For miniature circuit breakers, they only have limit short-circuit breaking capacity parameters.
Mutai Group has accumulated more than ten years of manufacturing and sales experience in circuit breakers, contactors, dual power automatic transfer switches (ATS) and related fields. We eagerly look forward to the opportunity to work with you.
Post time: Jan-30-2024
