Low-voltage leakage protector installation and use - Database & Sql Blog Articles

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The low-voltage leakage protector is a protection device designed to prevent low-voltage electric shock accidents. If insulation damage, electric leakage or electric shock occurs in the low-voltage power grid, it can immediately signal a signal or quickly cut off the power supply to protect personal safety and carry out Insulation supervision to protect equipment. Some people think that with the leakage protector, it is a comprehensive policy, and what operating procedures and rules and regulations are placed behind the scenes. Please note! The leakage protector is not universal protection.

First, the installation notes

1. The leakage protector should be installed in a dry place to avoid the erosion of rain, dust and harmful gases. The leakage protector used for total protection shall be installed in front of the switchboard for operation and observation; the leakage protector used for terminal protection shall be installed in the same meter box as the electricity meter and fuse box, and the leakage protector shall be installed in the insurance. Below the box, the wiring must not be reversed and reversed, and should be installed vertically, and the crimping nut should be tightened.

2. The power inlet of the electronic leakage protector should be drawn from the front end of the main contact of the AC contactor. The power incoming line is preferably controlled by the knife switch.

3. The zero-sequence current transformer should be kept away from the electrical equipment with magnetic field, such as AC contactor, current transformer, current-carrying busbar, etc., and the distance should not be less than 20cm.

4. The neutral point of the distribution transformer should be well grounded, and its grounding resistance should be less than 10Ω.

5. It is strictly forbidden to repeat the grounding of the neutral line; the grounding protection can be set at the same time, but the zero-connection protection cannot be set.

Second, the use of precautions

1. After the installation of the leakage protector, first check the wiring for errors. Power is confirmed after confirmation.

2. After the operation of the leakage protector is found, the cause should be ascertained and the corresponding measures should be taken to restore the power. It is strictly forbidden to forcibly electrify, and it is not allowed to be taken out of operation to ensure safe use of electricity.

3. The leakage protector should be tested regularly, usually once a week, and the problem should be dealt with in a timely manner.

4. The operating current of the leakage protector should be adjusted according to the actual situation, but the operating current of the branch must be lower than the operating current of the main road.

Third, preventive measures can be taken

1. Strengthen professional technical training and safety education for employees, and improve employees' operational knowledge and self-safety awareness.

2, installed a leakage protector, work must also strictly enforce the operating procedures, wear protective labor supplies, can not have the slightest numbness.

3. The leakage protector should not be used alone. It is only suitable for low-voltage lines or hand-held power tools as an additional protection device.

4. After the leakage protector is activated, the cause of the action should be checked immediately, and the power can be restored after the accident is eliminated.