Three-phase transformer forwards and backwards


Datasheet as PDF


Three-phase transformer forwards and backwards

BV 1965005


Customer’s demand


Our customer is looking for a 3-phase transformer for application in a 50 kW inverter. The transformer is supposed to be part of a bidirectional 4-phase inverter. Both primary and secondary need a star connection with outwards lead star point. The power should be transferable in both directions. Every phase, this includes the star point, should be able to cope with only one third of the total power, when operated monophasic.


Solution


We construct an adapted three phase transformer with adjusted primary- and secondary winding. As vector group YNyn0 is used.


Technical data


Power: 50 kVA
Primary: 3 x 400 V
Secondary: 3 x 400 V
Current: 80 A
Weight: 300 kg
Vector group: YNyn0


Neutralisation of phase delay


Transformer to neutralise phase delay

BV 1521100


Customer’s demand


Our customer is looking for a 3-phase trasnformer to perform power measurements with in phase voltages. The phase delay caused by the existing three phase transformer with 3 x 400 V output should be reversed by 150°. A transformer with small power is enough for our measurement setup. The device should be mounted in a housing with 4 mm sockets.


Solution


We develop a three phase transformer with adjusted primary- and secondary voltages. The chosen vector group Dy5n as well as the winding setup make it possible to operate the transformer forward and backwards and thus to reverse the phase delay of the existing three phase transformer.


Technical data


Power: 100 VA
Primary: 3 x 400 V
Secondary: 3 x 100 V no-load
Current: 0,58 A
Weight: 4,5 kg
Vector group: Dy5n


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