Transformer no-load operation

200kva electrical transformer no-load operation refers to the transformer primary winding access to power, the secondary winding open working conditions. In this case, the current in the primary winding is called the no-load current of the transformer. The no-load current generates a no-load magnetic field. In the main magnetic field (that is, cross-linked one or two windings of the magnetic field) under the action, the first and second winding will be induced in the electromotive force.

When the 50 kva pole mount transformer no-load operation, although the secondary side no power output, but the primary side is still part of the power from the grid to absorb the active power to compensate for the magnetic saturation, in the core caused by hysteresis loss and eddy current loss referred to iron consumption. The hysteresis loss depends on the frequency of the power supply and the area of ​​the hysteresis loop of the core material. The eddy current loss is proportional to the square of the maximum flux density and frequency. In addition there is no load current caused by copper consumption. For different capacity of the transformer, no-load current and no-load loss size is different.