Wuhan UHV specializes in producingseries resonance (also known as variable frequency series resonance device). Next, we will share with you the introduction of series resonance as a substitute for power frequency withstand voltage.

Series resonancecan replace power frequency pressure. The corona sound and ozone odor of 7KV power frequency withstand voltage are very strong, which may be caused by the discharge of air from the test transformer casing. The low and odorless sound of the series resonance is due to the voltage distribution of the series resonance being distributed from bottom to top throughout the height of the reactor. So the creepage distance is different, so there is no ozone smell.  

Substation frequency converter series resonance tester, this series of voltage withstand devices is mainly designed and manufactured for AC voltage withstand testing of primary electrical appliances in substations of 220 kV and below. According to the requirements of the regulations, AC withstand voltage tests can be conducted on compatible equipment such as transformers, GIS systems, SF6 switches, cables, and bushings.  

It can not only meet the testing conditions of high and low current equipment for substation variable frequency series resonance testing devices, but also meet the testing conditions of low and high current equipment. It has a wide range of applications and is an ideal pressure resistant equipment for high voltage testing departments and power maintenance engineering testing units at the prefecture, city, and county levels. The series resonance testing device of the substation mainly includes variable frequency control power supply, excitation transformer, reactor, capacitive voltage divider, etc. The variable frequency control power supply adopts an imported specialized SPWM digital waveform generation chip, with a frequency resolution of 16 bits and a frequency fineness of 0.1 Hz when the frequency is between 20~300 Hz. At the same time, it adopts orthogonal asynchronous fixed carrier modulation to ensure good output waveform in the entire frequency domain; The power part adopts advanced IPM modules to ensure the stability and safety of the instrument.