Ups Transformer Connection Diagram. Balanced connection when supplying 1 φ and 3 φ loads. In case of on line ups the battery operated inverter works continuously whether the mains supply is present or not.
The phasor diagram of the y connection of the three phase transformer is shown in the figure below. A transformer can not act as a phase changing device and change single phase into three phase or three phase into single phase. Conversely the y connection is used for stepping up to a high voltage as in generation station transformer.
Automatic ups system wiring diagram in case of some items depends on ups and rest depends on main power at office or home.
The connection diagram on the left shows how a delta delta connection can be made either with three single phase transformers or with one three phase transformer. The phasor diagram of the y connection of the three phase transformer is shown in the figure below. Similarly v bn leads v bn by 30º and v cn leads v cn by 30º this connection is also called 30º connection. The connection diagram on the left shows how a delta delta connection can be made either with three single phase transformers or with one three phase transformer.
