A process for detecting degradation of a switching device including: a mobile electrical contact; a control mechanism including: a driving element of the mobile contact, an elastic member linked to the driving element, and an unlocking member configured to release the elastic member so as to move the contact so as to open an electrical circuit; and an actuator configured to displace the unlocking member. The process includes: (i) commanding the actuator, (ii) determining the duration of time between a first instant corresponding to a predetermined position of the unlocking member and a second instant corresponding to a predetermined position of the driving member, (v) carrying out a set of successive commands of the actuator, so as to obtain a set of values of the duration of time, and (vi) determining a degradation of the unlocking member of the switching device from the evolution of the values of the set of values.

A non-polarized snap-on electromagnetic relay capable of arbitrarily connecting two electrodes for electrical conduction to execute a charging or discharging operation without the need of considering positive and negative polarity includes a base, a solenoid coil assembly, a link assembly, a fixed contact assembly, and a movable contact assembly, and all these assemblies are installed on the base. The base of the electromagnetic relay further includes a barrier block disposed in the fixed contact assembly and symmetrically arranged between two fixed conductive plates, and a movable spring plate of the movable contact assembly is set across the barrier block, so that the stroke movement of the movable contact on the movable spring plate takes place on two sides of the barrier block, and the barrier block contains a strike-arc magnet.

A non-polarized snap-on electromagnetic relay capable of arbitrarily connecting two electrodes for electrical conduction to execute a charging or discharging operation without the need of considering positive and negative polarity includes a base, a solenoid coil assembly, a link assembly, a fixed contact assembly, and a movable contact assembly, and all these assemblies are installed on the base. The base of the electromagnetic relay further includes a barrier block disposed in the fixed contact assembly and symmetrically arranged between two fixed conductive plates, and a movable spring plate of the movable contact assembly is set across the barrier block, so that the stroke movement of the movable contact on the movable spring plate takes place on two sides of the barrier block, and the barrier block contains a strike-arc magnet.