EARTHIG TRANSFORMER


~ there is no neutral meet when the system is delta connected.

~ or many system are neutral connected but there construction are not med to connected the system.

~ in such circumstances the remainder falls from the old to the old ,that is to say, 

~ transformer has a limed core.

~ two winding are placed on each limb.

~ wow a set is attached to a star and the neutral end is extraded from it.

~ this winding is connected to the winding is connected to the winding of the second set in such a way that the currents of the two winding on each limb are in opposite direction.

~ hence less excise current flow in normal condition.

~ the impedance of the earthing transformer is reduce.

~ hence the amount of fault current is higher.

~ therefore to reduce the cost of fault current is higher.

~ therefor to reduce the cost of fault current a current limiting register is connected to the rule circuit or the winding of the earthing transformer.

~ the current limiting register is connected is connected to the neutral circuit