Station Service Transformer Connections. The connections shall be made, between the transformer’s terminals and the incoming and outgoing conductors, carefully following the instructions given on the nameplate or on the connection diagram. The primary and secondary of the transformer can be independently connected either in star or delta.
The hv connections to the station transformer may be overhead or underground depending on the site. We offer a variety of mounting and cover options for our station type transformers’ primary and secondary bushings. Because of this third winding, the transformer is called three winding transformer or 3 winding transformer.
The lv connections may be either 11 kv cables or phase isolated busbars depending on the relative locations of the station transformer and its associated 11 kv station switchgear.
In some high rating transformer, one winding in addition to its primary and secondary winding is used. The main function of this transformer is to provide convenient amount of power in the various boards. When a single unit or bank of three is used, there are four types of connections. It will be noted that one restraint coil is