Electrical five defense detailed explanation

Basic definition: Five prevention usually refers to the abbreviation of five anti-error functions for electrical equipment to ensure personal safety, which is one of the important measures for power safety.

1, to prevent misdivision, close circuit breaker.

2, prevent with load division, close isolation switch.

3, prevent live hanging (close) grounding wire (grounding switch).

4. Prevent power transmission with ground wire.

5, prevent stray live interval.

The "five defenses" of the power distribution room are fire, water, lightning, snow and small animals. "One pass" means good ventilation.

Principle of use

Any high-voltage electrical equipment that may cause misoperation should be equipped with a fail-proof device, and the performance and quality of the device should meet the requirements of product standards and relevant documents.

1, the error prevention device should achieve the following functions (referred to as the five prevention) :

(1) Prevent misdivision and misclosing of circuit breakers;

(2) Prevent pulling and closing the isolation switch with load;

(3) Prevent live (hanging) grounding wire (switch);