When testing the mechanical performance of relays and auxiliary equipment, it is necessary to strictly follow the process specified for testing relay protection devices. Firstly, it is necessary to carefully inspect the appearance of the relay and auxiliary equipment for any damage, whether there is dust on the contact parts of the components, and whether their cleanliness affects the normal use of the machine; And it is necessary to conduct corresponding fault detection on the rotating parts of the relay protection device and its auxiliary equipment, mainly including whether the rotating parts are flexible and reliable, and whether the operating range meets the corresponding operating regulations; Secondly, detailed testing should be conducted on the normal operation of the contact points of relay protection devices and auxiliary equipment to ensure that the contact and return of the contacts are in a normal operating state; During this period, it is also necessary to check whether the terminal strip wiring is secure and whether the mechanical operation is normal. It should be noted that during regular testing of the mechanical performance of relays and auxiliary equipment, in addition to checking the operating status of external devices, spot checks of internal devices should also be carried out