It is used for the on-off ability test and the normal operation lifespan test of the Switches for household and similar fixed-electrical installations. Besides, it is also applied in the test of breaking volume of plug and socket, and mechanical action of normal operation lifespan. The testing purpose is to see whether the switches or the plugs and sockets can endurance the mechanical damage or electric fatigue failure during the normal operation. Whether the contact adhesion occurs or there is a phenomena of being the on (off) station for a long time, which is the criterion of judging the sample is over damage or not. 1060mmx700mmx700mm,160kg,960mmx600mmx600mm