What is the role of the power transformer tap changer?

2019-06-27 14:55:28 JUKE CHINA ODM OEM Transformer factory Read

What is the role of the power transformer tap changer?

The tap changer of the Power Transformer is used to regulate the output voltage of the transformer. Since the voltages in the power system grid are not exactly the same, in order to make the transformer output the rated voltage no matter where it is installed in the grid, multiple taps are set in the high voltage winding of the transformer, and the tap is connected to the tap changer. Connected to the grid through switches.

In this way, the turns ratio of the high and low voltage windings of the transformer can be changed by the tap changer and the different transformer winding taps, thereby achieving the purpose of adjusting the output voltage of the transformer.

There are two types of taps: no-load regulation and on-load regulation. The former can only adjust the tap changer position after the transformer is disconnected from the grid, while the latter can adjust the tap position in the transformer operating condition.
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General distribution transformers, if there is no special requirement, use the unloaded tap changer switch, the adjustment grade is ±5% rated voltage, and the capacity is slightly larger, it can be ±2X2.5%.

With the on-load tap changer, there are many combinations of ±5X1.25%, ±7X1.0%, and so on.

The tap changer of the power transformer is used to regulate the output voltage of the transformer. Since the voltages in the power system grid are not exactly the same, in order to make the transformer output the rated voltage no matter where it is installed in the grid, multiple taps are set in the high voltage winding of the transformer, and the tap is connected to the tap changer. Connected to the grid through switches.

In this way, the turns ratio of the high and low voltage windings of the transformer can be changed by the tap changer and the different transformer winding taps, thereby achieving the purpose of adjusting the output voltage of the transformer.