DEVICE FOR THE ELECTRIC TEST single- and three-phase power transformers

摘要

The invention relates to the field of electrical power converter and a power source for electrical testing the internal insulation of the applied voltage and the induced, experiments idling and short-circuit phase and three-phase power transformers. Used mainly in mobile applications to test power transformers. The achieved technical result consists in increasing the level provided by the device maximum full power when testing a single-phase power transformer to a value of 87% of the level provided by the device maximum full power when testing a three-phase power transformer, whereby possible to reduce the installed power, weight and dimensions of the device in case of the requirement to ensure the same maximum full power when tested as a single-phase and three-phase power voltag Hur. The apparatus for electrical testing of single-phase and three-phase power transformer comprising a static frequency converter consisting of a power rectifier and a three-phase auxiliary inverter voltage with a connected filter device having reactors, capacitor banks and several terminals, and a matching transformer whose primary winding is connected to filtering device and the secondary winding is connected to the transformer to be tested, characterized in that the three-phase voltage nvertor comprises six arms, and the filtering device comprises three six reactors and capacitor batteries, the conclusions of the filtering device may switch using a part of the utility model switching devices for switching between single-phase and three-phase test of the power transformer. Independent voltage inverter, which is part of a static frequency converter prototype comprises three arm inverter, only two of which are involved in the work in testing the single-phase power transformer. In the device of the utility model are used all six inverter shoulders during the test phase and three-phase power transformers. 5 yl.