Excitation transformer Power frequency AC withstand voltage test complete set
The power frequency withstand voltage test device for substation electrical equipment, this series of withstand voltage devices is mainly designed and manufactured for AC withstand voltage tests of primary electrical equipment in 220KV and below substations. According to the regulations, it can meet the requirements for capacitive equipment such as transformers, GIS systems, SF6 switches, cables, and bushings. It can meet 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 equipment for prefecture, city, and county-level high-voltage testing departments and power installation, repair, and testing engineering units.
Power frequency AC withstand voltage test complete set
It mainly consists of a variable frequency control power supply, excitation transformer, reactor, and capacitive voltage divider. Among them, the variable frequency control power supply adopts an imported special 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 to 300Hz. At the same time, it adopts orthogonal non-synchronous fixed carrier modulation to ensure good output waveform throughout the entire frequency range; the power part adopts advanced IPM modules to ensure instrument stability and safety.
Compared with similar domestic products, this series of devices has multiple key advantages:
1. The reactor of the same voltage level and capacity is smaller in size and lighter in weight; the temperature rise is small under rated load; it adopts dry-type epoxy casting, with high mechanical strength, good electrical insulation performance, beautiful and reliable.
2. The variable frequency control source has a large capacity margin; strong protection functions; good output waveform; good stability; multiple working modes, convenient operation; uses 220V or 380V single-phase power supply, convenient for on-site power access.
3. Flexible configuration. Different types of reactors can be optionally configured to meet different test requirements, achieving multiple uses with one machine, with high cost performance.
Power frequency AC withstand voltage test complete set technical parameters:
◆ Rated output voltage: 0～500KV (AC RMS) and below
◆ Output frequency: 20～300Hz
◆ Resonant voltage waveform: pure sine wave, waveform distortion rate <1.0%
◆ Maximum test capacity: 1000KVA and below
◆ Duty cycle: under full power output, continuous working time 15min
◆ Quality factor: 30～90
◆ Frequency adjustment sensitivity: 0.1Hz, instability <0.05%
◆ Working power supply: 380/220V±15%/50Hz±5%
◆ YG series product configuration and applicable scope
