Abstract:

Electromagnetic residual current operated circuit breakers with integral over current protection (RCBO) have strong anti-electromagnetic interference ability,but in the actual production process,when the instantaneous high current is applied to verify the instantaneous characteristics of the breaker,the leakage characteristics of the breaker may act at the same time,which makes it impossible to judge the instantaneous characteristics of the product.Whether the instantaneous characteristics are qualified or not will have a certain impact on the production of the breaker.Through simulation analysis,we find the mechanism leading to the failure and put forward suggestions for improving the design of the magnetic ring.

Key words: electromagnetic residual current operated circuit-breakers, electromagnetic relay, simulation analysis, induced voltage