Darui Electric recommends
Technical Parameters:
Voltage Level: 50KV
Capacity Range: 5KVA
No-load Current: <7%
Impedance Voltage: <8%
Partial Discharge at Rated Voltage: <5PC
Series resonance is mainly used for power frequency withstand voltage tests of 6kV-500kV cross-linked rubber-plastic power cables, 6kV-500kV transformers, AC withstand voltage tests for GIS and SF6 switches, AC withstand voltage tests for generators, and AC withstand voltage tests for other high-voltage power equipment such as busbars, bushings, and instrument transformers. Its basic principle is to use an adjustable (30--300Hz) series resonant test device to resonate with the capacitance of the test object to generate an AC test voltage. In an AC circuit with resistance R, inductance L, and capacitance C elements, the voltage across the circuit and the current phase are generally different. If we adjust the parameters of the circuit elements (L or C) or the power frequency, they can be made to have the same phase, and the entire circuit appears purely resistive. This state of the circuit is called resonance. In the resonant state, the total impedance of the circuit reaches an extreme value or approximately reaches an extreme value. The purpose of studying resonance is to understand this objective phenomenon, fully utilize the characteristics of resonance in science and applied technology, and at the same time prevent the harm it may cause. According to different circuit connections, there are two types: series resonance and parallel resonance. In a series circuit composed of resistance, inductance, and capacitance, when the capacitive reactance XC equals the inductive reactance XL, i.e., XC=XL, the voltage U and current I in the circuit have the same phase, and the circuit appears purely resistive. This phenomenon is called series resonance (also known as voltage resonance). When series resonance occurs in the circuit, the impedance Z=√R2+XC-XL2=R, the total impedance in the circuit is minimized, and the current reaches its maximum value.
Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.
