Grounding Transformer
A grounding transformer or earthing transformer is a type of auxiliary transformer used in three-phase electric power systems to provide a ground path to either an ungrounded wye or a delta-connected system. Grounding transformers are part of an earthing system of the network. They let three-phase ( delta connected) systems accommodate phase-to-neutral loads by providing a return path for current to a neutral. Grounding transformers are typically used to: * Provide a relatively low-impedance path to ground, thereby maintaining the system neutral at or near ground potential. * Limit the magnitude of transient overvoltages when restriking ground faults occur. * Provide a source of ground fault current during line-to-ground faults. * Permit the connection of phase-to-neutral loads when desired. Grounding transformers most commonly incorporate a single winding transformer with a zigzag A zigzag is a pattern made up of small corners at variable angles, though constant within the ...
[...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]