Automatically changes the lines from Main to Gen & Vice versa. Changing over to Main line with the delay. Auto/Manual Selector Manual Main/Gen Selector are available. All Component are Pick & Plug type and easily Serviceable. All Comes as Individual Compact Cubical in the Panel Necessary LED and fuse are available. Single phase preventer is available. 14 SWG / 16 SWG Enclosure Reputed Mak L & T/ ABB/ 4Pole power contactors are used. Under voltage cutoff with Auto Reset is available. Service is available after warranty also.