12. ELECTRICAL MACHINES AND DRIVES Electromagnetic relay modelling: a multi-physics problem

Abstract — In order to ensure life safety, differential circuit breakers are employed. These devices are usually made of different parts. One of the part that will be described in this paper is the electromagnetic relay. This actuator must be modeled with a great accuracy in order to predict if the circuit breaker will open if an eventual fault occurs. In this paper, we focus on the modelling of the geometry of the electromagnetic relay and of its static behaviour. A tripping criterium and different optimization results of the model parameters will be discussed. I