The withstand voltage resonant step-up device is mainly designed and manufactured for AC withstand voltage tests of primary electrical equipment in substations of 110kV and below. It can meet the AC withstand voltage test requirements for capacitive equipment such as transformers, GIS systems, SF6 switches, cables, and bushings according to regulations. It can satisfy both high-voltage, low-current equipment test conditions and low-voltage, high-current equipment test conditions, with a wide range of applications. It is an ideal withstand voltage device for prefectural, municipal, and county-level high-voltage test departments and power installation, repair, and test engineering units.
Compared with similar domestic products, this series of devices has several key advantages:
1. Reactors of the same voltage level and capacity are smaller in size and lighter in weight; temperature rise is small at rated load; dry-type epoxy casting is adopted, with high mechanical strength, good electrical insulation performance, beautiful appearance, and reliability.
2. The variable frequency control source has large capacity margin; strong protection functions; good output waveform; good stability; multiple working modes, easy operation; uses 220V single-phase power supply, convenient for on-site power access.
This series of devices mainly consists of a variable frequency control power supply, an excitation transformer, reactors, and a capacitive voltage divider. Among them, the variable frequency control power supply adopts an imported dedicated SPWM digital waveform generation chip with a frequency resolution of 16 bits, and the frequency fineness can reach 0.1Hz in the range of 20-300Hz. At the same time, an orthogonal non-synchronous fixed carrier modulation method is adopted to ensure good output waveform throughout the entire frequency range; the power section uses advanced IPM modules to ensure instrument stability and safety.
Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.