What is the difference between the control power supply and the operation power supply of the circuit breaker from the circuit point of view?

1. Both the working power supply and the control power supply are drawn from the DC screen, but the difference is that the control power supply has a small capacity and the working power supply has a large capacity;

2. The operating power supply can be cut off for a long time, which has no influence on the system security, while the control power supply cannot be cut off for a long time.

3. The control power supply is mainly responsible for the lighting, signal and protection of the switch and device circuit, and the operating power supply is only used as the closing coil of the switch;

4. Because they are all led from one power supply, no matter which grounding path will affect the DC system;

Extended data:

1. Operating power supply: directly led from the battery pack of DC screen, with large power supply capacity and inaccurate voltage. The voltage of 220v DC panel system is generally 243v, which is used to drive the closing coil, opening coil and energy storage motor of circuit breaker.

2. Control power supply: accurate and stable 220v DC voltage is obtained from the battery pack through the step-down silicon chain, and the general deviation is less than 2 V. The power supply capacity is small, and it is specially used for measurement and control instruments, microcomputer integrated protectors, signal lamps, etc. Accurate and stable voltage can ensure the measurement and control accuracy of measurement and control instruments and microcomputer integrated protectors, thus improving the reliability of power supply system.