Series resonance is a circuit property and also a testing device for series resonance. Series resonance is a very practical and important voltage withstand test device in power systems. Its components are: variable frequency power supply, excitation transformer, high-voltage reactor, and capacitive voltage divider. So what are the functions of these components?  

1、 Variable frequency power supply

The function of a variable frequency power supply is to convert a 220V/380V, 50Hz power supply into a frequency adjustable and voltage continuously adjustable power supply. The variable frequency power supply also has functions such as operation, protection, control, and monitoring of the power system.

2、 Excitation transformer

The function of the excitation transformer is to boost the voltage output by the variable frequency power supply, and the excitation transformer isolates both high and low voltage.  

3、 High voltage reactor

The function of a high-voltage reactor is to cause series resonance between the high-voltage reactor and the capacitor of the test object in series.

4、 Voltage divider

The function of a voltage divider is to measure the high and low voltage values on the regulator.

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