Aliases
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Variable frequency resonance, variable frequency series resonance, series resonance, series resonance transformer, series resonance test equipment, generator AC withstand voltage resonance boosting device
Main Applications
This equipment is mainly used for the following aspects:
1. AC withstand voltage test of 6kV-500kV high-voltage cross-linked cables
2. Power frequency withstand voltage test of 6kV-500kV transformers
3. AC withstand voltage test of GIS and SF6 switches
4. AC withstand voltage test of generators
5. AC withstand voltage test of other high-voltage power equipment such as busbars, bushings, and instrument transformers.
This complete set of equipment consists of a variable frequency power supply, excitation transformer, reactor, and voltage divider.
Equipment Introduction
It is composed of a variable frequency power supply, excitation transformer, high-voltage reactor, and capacitive voltage divider. The capacitance of the test object and the reactor form a series resonance connection; the voltage divider is connected in parallel to the test object to measure the resonance voltage on the test object and serve as an overvoltage protection signal; the frequency conversion power output is coupled to the series resonance circuit through the excitation transformer to provide the excitation power for series resonance. Shanghai Dafan specializes in R&D and production, adopting a split design to greatly reduce labor intensity.
