Rail 110V 220V 63A 100A Dual Power Automatic Transfer Switch 50/60Hz Grade Auto Or Manual Selection 1Pcs (Size : 220V, Color : 4P 100A) 

Circuit Breakers / Miniature Circuit Breakers<br/>W2R Mini 2P 3P 4P Automatic Transfer Switch Electrical Selector Switches Dual Power Switch Rail Type 63A 100A <br/>City Power GeneratorGeneral<br/>GEYA W2R series Mini ATS Dual Power Automatic Transfer Switch is PC Level developed micro household power transfer switch When the normal city power is abnormal the back up power works at once no Interrupt ensures the continuirty reliability, and of power supply. <br/>NOTE: The rated voltage of the common and backup power supply must in range 85%-110%, and the current cannot be less than 5A, otherwise the coil will heat up or even spontaneously burn. If your city voltage not stable, please kindly add voltage protectors in system.