The power input of the variable frequency series resonance withstand voltage test device is divided into two parts. From the production design requirements of the variable frequency series resonance withstand voltage test device, the "working power supply", as the name suggests, is mainly to provide power for the normal operation of the instrument. It can also be called the variable frequency series resonance withstand voltage. The frequency modulation power box of the test device neurally controls the part of the working power supply, and the "power power supply" provides a guarantee for the lower and upper levels to produce resonant output high voltage. The power quality is directly related to the output voltage and power when testing the cable or the tested product. Whether to complete the cable length and the voltage withstand test of the tested product, Jiangsu Huafang Electric Technology Co., Ltd. through many years of field practice, recommends to users:
1. The working power supply of the instrument generally needs to be connected to 220V; the equipment power supply is recommended to use 380V;
2. The live wire of the working power supply of the instrument should be tapped with the 380V live wire of the power supply. Try to avoid using electric welders and other equipment in the power line to prevent interference.
3. If the generator is used for power supply, the neutral line should be grounded;
4. If it is found that: when the power output of the frequency conversion series resonance withstand voltage test device is started, the upper line air switch or circuit breaker of the connected 380V power supply has dropped, indicating that the current of the circuit breaker or air switch is too small to adapt to the test power supply According to the requirements, the appropriate air switch or circuit breaker can be replaced.
