Identification of leakage accidents of leakage protectors

The so-called leakage refers to the current leakage caused by natural or man-made reasons, such as: high temperature, scratches, corrosion, etc., which reduce the insulation capacity of the wires, due to insulation damage or other reasons. If there is a certain potential difference between the electrical shell and the mains live wire and the ground for some reason, leakage will occur.

The leakage protector (leakage protection switch) is an electrical safety device. Install the leakage protector in a low-voltage circuit. When leakage or electric shock occurs and reaches the operating current value limited by the protector, it will immediately operate within a limited time and automatically disconnect the power supply for protection.

Zhongke Testing and Appraisal Institute can provide leakage accident identification services for leakage protectors, and make accurate identifications of trace evidence analysis and accident cause analysis in various leakage protector leakage accidents.

0

1

1. The leakage protector has expired.

The leakage protector has a limited service life, generally about 5 years. After this time, the leakage protector will easily fail.

2. Unqualified quality

When purchasing leakage protectors, you should choose products that have been formally certified rather than cheap defective products. A leakage protector with substandard quality may pose safety hazards and increase the risk of electric shock.

3. Improper operation

0When installing a leakage protector, you need to install it in accordance with the requirements of its instructions and comply with relevant regulations. Improper use may cause the leakage protector to fail and increase the risk of electric shock.

1

2

3

4

5

6

7

A user in a certain city was electrocuted while using an electric water heater to take a bath. The victim's family suspected that there was a quality problem with the leakage circuit breaker, which led to the tragedy.

Entrusted by the court, a third-party appraisal agency conducted a technical appraisal of the "leakage accident of the leakage protector" to find the direct cause of the accident.

Appraisal and analysis results:

Our appraisers went to the site involved to conduct inspections and found out the "leakage accident of leakage protector" involved this time The reasons are analyzed as follows:

The leakage protector of the water heater was soaked by water. When the user touched the power cord in a wet state, a leakage electric shock occurred at the reset button of the leakage protector, causing the user to be electrocuted.

0

1

2

3

4

5