what is the meaning of parameters of plastic case circuit breakermolded case circuit breaker can automatically cut off the current when the current exceeds the jump setting. plastic case refers to the use of plastic insulators as the shell of the device, used to isolate between conductors and grounding metal parts. plastic case circuit breakers usually contain thermomagnetic jump-off units, while large-scale plastic case circuit breakers are equipped with solid-state jump-off sensors...