How to choose the distribution box and the empty switch inside?

According to load power, load nature, voltage level, transformer impedance, cost, etc.

1, load power and voltage determine the rated current of air switch;

2. The nature of the load determines the release of the opening, such as the D-type release of overload and the general C-type release.

3. The nature of the load also determines whether the leakage circuit breaker is needed.

4. The voltage level determines the rated voltage of air;

5. The impedance of transformer determines the choice of open circuit and short circuit breaking ability;

6. The cost determines whether to choose an empty brand, whether it is imported or made in China.

This problem involves many aspects, which cannot be completely summarized in a few simple words. It is recommended to look at relevant codes and standards, refer to/view/98918d7f0975f46527d3e19d.html.