a leakage switch needs to be installed.

the main function of the leakage protector is to prevent the leakage of equipment and fatal electric shock. Leakage current action protector, referred to as leakage protector for short, is also called leakage protection switch, which is mainly used to protect people with fatal danger from electric shock when leakage failure occurs in equipment.

1. The equipment has a shell collision fault.

2. The insulation of the wires that are connected by private wires is damaged.

3. The human body directly touches the phase line voltage.

4. In particularly humid places (such as swimming pools, shower rooms, kitchens, bathrooms, etc.), the risk of electric shock death is greatly increased due to the decrease of human skin resistance, and electric shock casualties can be effectively reduced after installing leakage protectors.

5. When the insulation of some electronic equipment is damaged, the exposed metal accessories (such as TV sets, pull rod antennas of tape recorders, etc.) may carry dangerous voltage, which cannot be eliminated by grounding. Only by installing leakage protectors can the circuit be quickly cut off at the moment of electric shock and personal safety be guaranteed.

6. prevent electric shock accidents caused by electric equipment and electric circuit leakage;

7. prevent single-phase electric shock accidents in the process of electricity consumption;

8. cut off the single-phase grounding fault in the operation of electrical equipment in time to prevent fire accidents caused by leakage;

9. With the improvement of people's living standards and the increasing number of household appliances, in the process of using electricity, personal electric shock and fire accidents caused by the defects of electrical equipment, improper use and ineffective safety technical measures have brought undue losses to people's lives and property. The appearance of leakage protector provides a reliable and effective technical means to prevent all kinds of accidents, cut off power supply in time and protect the safety of equipment and people. The leakage protector should meet the following technical requirements:

1. The sensitivity of electric shock protection should be correct and reasonable, and the general starting current should be in the range of 15~31 mA.

2. The action time of electric shock protection should not be greater than 1.1 second in general.

3. The protector should be equipped with necessary monitoring equipment to prevent it from losing its protection function when the operating state changes. For example, for voltage-type electric shock protectors, a neutral grounding device should be installed.