Electric leakage protector is mainly used to prevent indirect contact electric shock and direct contact electric shock, can also be used to prevent leakage fire and monitor single-phase ground fault.
Electric leakage protector is an important electrical product related to personal safety, in the daily work in accordance with national regulations on the operation of the leakage protector to do a good job of operation and maintenance work, found that the problem is dealt with in a timely manner.
Electric leakage protector into operation, should be an annual census of the protection system. The key items of the survey include: detecting whether the leakage current meets the requirements; measuring the insulation resistance of the power grid and equipment; measuring the neutral point leakage current, eliminating all kinds of leakage hidden danger of the power grid; checking whether the grounding device of the transformer and motor is loose and poor contact.
Installation precautions
Before installation, we should check the rated voltage, rated current, short-circuit breaking capacity, leakage current, leakage current, leakage current and leakage time of action whether it meets the requirements; leakage protector installation and wiring should be based on the type of protective grounding of the distribution system, according to the wiring diagrams shown in table 3-8 Wiring. When wiring, to distinguish between phase and zero line.
The installation of leakage protector places are: handheld and mobile electrical equipment; construction site electrical equipment; electrical equipment used in particularly harsh or wet places (such as boiler rooms, canteens, basements, bathrooms, etc.); the building of each household into the switch or socket dedicated circuit; electrical equipment powered by the TT system; direct contact with the human body of the medical equipment (first aid and surgical), etc. Electrical equipment in direct contact with the human body (except for first aid and surgical electrical equipment), etc.