Electrolytic capacitors have excellent high frequency insulation properties. Capacitance and loss are independent of frequency over a large frequency range and vary very little with temperature, while dielectric strength increases with temperature, which is difficult to do for other dielectric data. High temperature resistance, low absorption coefficient. What is the method of selecting the rated working voltage of electrolytic capacitor?

Principle: The main problem of electrolytic capacitors used in electronic ballasts is that the electrolytic capacitors are damaged during operation due to insufficient withstand voltage or poor temperature coefficient.

This method detects the quality of the electrolytic capacitor by charging and discharging under the condition of maximum voltage resistance of the electrolytic capacitor, and the screening effect is better when the high temperature condition allows.

If the performance of the electrolytic capacitor is not enough, when there is a slight leakage, the charge stored in other electrolytic capacitors will discharge through the capacitor, resulting in the damage of the capacitor with poor performance. The electrolytic capacitor with good performance is intact.

Aluminum electrolytic capacitor

Selection method of rated working voltage: In general, the rated working voltage is 110-120% of the identified voltage of the electrolytic capacitor.

If the identification voltage is 400 volts, the operating voltage is 440 to 480 volts. If the instrument is chosen to be 440 volts at high temperature and 480 volts at low temperature.