125A Molded Case Circuit Breaker, referred to as 125A MCCB, is an electrical protection device that can be used in a wide voltage range, 50Hz and 60Hz frequency.
The main difference between a molded case circuit breaker and a miniature circuit breaker is that the MCCB can be rated up to 2,500 amperes and its trip setting is usually adjustable.
Another difference is that MCCB tends to be much larger than MCB. Like most types of circuit breakers, MCCB has three main functions.
125A MCCB Functions
1.Overload protection-In the application, the duration of current higher than the rated value is longer than normal.
2.Electrical fault protection-In the event of a short circuit or line fault, the extremely high current must be interrupted immediately.
3.Open and close the circuit-this is a less common function of circuit breakers, but if there are not enough manual switches, they can be used for this purpose.
The wide range of current ratings available from molded-case circuit breakers allows them to be used in a wide variety of applications.
MCCB current ratings range from low values (e.g. 15 amps) to industrial ratings (e.g. 2,500 amps). This enables them to be used in low-power and high-power applications.
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|Type||Rated Current(A)||Pole||Rated insulating voltage(V)||Rated operating voltage(V)||Acring-over distance(mm)||Ultimate short circuit bareaking cppacity(KA)||Service short circuit breaking cppacity(KA)||Operation performance||Utilization category|
|TOS1-63L||(6) 10 16 20 25 32 40 50 63||3，4||500V||400V||0||25||18||1500/8500||A|
|TOS1-100L||(10) 16 20 25 32 40 50 63 80 100||800V||0≤(50)||35||22|
|TOS1-225L||100 125 160 180 200 225||≤50||35||22||1000 7000|
|TOS1-400L||225 250 315 350 400||≤50||50||35||1000 4000|
|TOS1-630L||400 500 630||≤100||50||35|