What is the standard configuration specification of the three-level distribution box?

1. N distribution boxes can be set below the main distribution box, and N switch boxes can be set below the distribution box; The main distribution box should be located in the area where the power supply is competitive, and the distribution box should be located in the area where the electrical equipment or load is relatively concentrated. The distance between the distribution box and the switch box should not exceed 30m, and the horizontal distance between the switch box and the fixed electrical equipment it controls should not exceed 3m.

2. The rated leakage action current and rated leakage action time of the leakage protector in the switch box should not be greater than 30ma and 0.1s; ; The leakage protector used in damp and corrosive places should adopt splash-proof products, and its rated leakage action current should not be greater than 15ma, and its rated leakage action time should not be greater than 0.1s.

3. The rated leakage action current and rated leakage action time of the leakage protector in the total distribution box should be greater than 30ma and 0. 1s, but the product of the rated leakage action current and rated leakage action time should not be greater than 30ma s. ..

Extended data:

General requirements for secondary leakage protection of three-stage distribution

1. The power distribution system on the construction site should adopt three-level power distribution and two-level leakage protection;

2. Electrical equipment must have its own independent special switch box;

3. The parameters of leakage protector should be matched, sensitive and reliable;

4. The total distribution box and switch box should be equipped with leakage protectors, and the distance between the distribution box and switch box and electrical equipment should meet the specification requirements;

References:

Three levels of distribution and two levels of protection _ Baidu Encyclopedia