KDZD-20A high voltage circuit breaker operating power supply (commonly known as "low voltage test power supply", also known as: open and close power supply) is a basic preventive test to ensure the safe operation of high voltage circuit breakers in power systems.

At present, the power sector basically uses the following two ways to test:

1. The DC system of the field control cabinet is used as the test power supply, and the voltage is adjusted by the sliding line rheostat for the test. The biggest drawback of this method is that if there is a short circuit or direct DC grounding in the field test connection, it will directly affect the entire DC system on the site, which will cause the on-site high voltage equipment to lose protection and the on-site DC system to collapse.
2, the use of on-site AC, with a voltage regulator for simple silicon rectification directly output DC. The disadvantages of this method are: ① the regulator is bulky, inconvenient to use, and the output DC ripple is large; The input and output are not isolated, and the shell may be charged, endangering personal safety.
In view of the above situation, our company developed a new generation of high-voltage circuit breaker operation power supply, the power supply input and output isolation, output DC stable and reliable, ripple coefficient is small, and over and over voltage protection, beautiful appearance, light volume, wiring, simple operation. It provides an independent test power supply for the field operation test of the high voltage switch, avoids direct use of the DC system in the field control box, effectively prevents the possible harm to the on-site DC system, and provides conditions for the safe operation of the field equipment.

Ambient temperature: -10 ~ 50℃
Ambient humidity: ≤75%RH
Input power: AC220V±10%
Dc output voltage: 0 ~ 270V continuously adjustable
Dc output current: 0 ~ 100V 30A 100 ~ 270V Limited power 3000W
Ripple coefficient: < 1%
Voltage stability: < 1%