The ground fault residual current will effectively install its protection device at the end of the line during the operation. Under normal circumstances, the short circuit setting current of the circuit breaker on the line trunk is much larger than the end circuit. Once the arc ground fault occurs, the trunk line It is impossible for the circuit breaker to cut off the fault current and it will not be protected. Therefore, the electrical fire caused by the ground fault on the main line is more dangerous. For this reason, only the residual current protection device is installed at the end, and it is impossible to protect the electrical fire caused by the single-phase grounding of the electric circuit. Only the residual current protection device is installed at the incoming end of the electric circuit, and the end protection forms a hierarchical protection mode, and the action characteristics can be coordinated. In order to prevent personal electric shock accidents, the protection device can prevent electrical fire accidents caused by single-phase grounding.
Ground fault residual current prevents ground fault from causing electrical fire
1. Ground fault residual current In the operation, it is necessary to carefully check whether the installation of the line meets the requirements of the electrical equipment regulations, such as the distance between the lines, the distance between the front and rear supports, and the inspection of the damaged insulation, etc., which should meet the safety requirements of the equipment. .
2. The grounding fault residual current needs to be periodically measured to check the insulation of the route. When the measured line conductor and conductor pair insulation resistance is less than its specified value during operation, the insulation damage must be treated during operation. Wires that are severely damaged during operation must be replaced.www.ctsensorducer.com