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Molded case circuit breakers can cut off the current automatically when the current exceeds the trip setting.
Plastic shell refers to the use of plastic insulators as a device shell, used to isolate the metal between
the conductor and ground. Molded case circuit breakers typically contain thermal-magnetic trip-out units,
while larger molded-case circuit breakers are equipped with solid-state trip sensors.
The trip unit is divided into: thermal magnetic tripping and electronic release. Commonly used,
the rated current total of the following 16 25 30 40 50 60 75 80 100 125 160 200 225 250 315 350 400 500 630 A.