What are the requirements of Auto Reclosing Circuit Breaker in use?

Promulgator : TAIXIDate : 2018-12-14Views : 1778

Everyone knows that the quality of materials directly affects the life of Auto Reclosing Circuit Breaker, but in fact, the details in the use process are also very important. What are the requirements when using Auto Reclosing Circuit Breaker?

1. When the leakage current is used as a reclosing circuit breaker, it should be adjusted according to the actual environmental factors and the size of leakage current. It can not be adjusted at will, which will lead to the failure to play its own functions.

2. When the Auto Reclosing Circuit Breaker is opened due to overload, short circuit or leakage fault of the protected circuit, if the operating handle is still in the middle position, the reason should be found out, the fault should be eliminated, and then it can be closed again.

3. For the newly installed reclosure, we need to press the test button to check whether the leakage protection action is normal.

What are the common failures of Auto Reclosing Circuit Breaker?

The automatic reclosure leakage protector device is an automatic device which automatically puts in the circuit breaker after the break-off due to the fault. The operation experience of power system shows that most of the overhead line faults are transient permanent faults, generally less than 10%. Therefore, after the short-circuit fault is removed by relay protection action, the arc will automatically extinguish. In most cases, the arc will be short. The insulation of the road can be automatically restored, so the PV Auto Reclosing not only improves the security and reliability of power supply, reduces the loss of power outage, but also improves the transient stability level of the power system, increases the capacitance of the high voltage line, and also corrects the wrong tripping caused by the circuit breaker and relay protection device, so the overhead line should adopt automatic reclosure leakage. Electric protector device.

PV Auto Reclosing manufacturers take you to understand the common faults of automatic reclosure. In the process of automatic reclosure, if there is a fault, it will lead to automatic reclosure can not play a good effect, so what should we pay attention to in the construction process?

1. Avoid faults caused by unqualified construction quality. In new construction and technological renovation projects, wiring errors are prone to occur, and unreasonable wiring leads to serious fever of wire clips and shedding of diagonal braces, which may lead to unsuccessful reclosure. This requires strict inspection in accordance with the new installation and verification items, strengthen the control of construction quality, and then use reclosure band switch to do a whole set of tests to test.

2. Reduce the faults caused by drift near the line. When the drift near the line falls on the line, it is very easy to have short-circuit fault between phases, and the drift is fluidity and randomness, which brings great difficulties to the inspectors. Therefore, in order to avoid this phenomenon as far as possible, inspectors should expand the scope of inspection and report the drift which may affect the safety of power supply on both sides of the line in a large area in time. In order to properly arrange treatment measures to ensure the safe and stable operation of the line.

3. Avoid faults caused by engineering design quality. Relay protection device updates quickly, because the fixed value calculator is not familiar with equipment and other reasons, resulting in deviation of calculation results. Especially for the lines with more branch lines, when the setting value is unreasonable, PV Auto Reclosing is likely to be unsuccessful. Therefore, the fixed-value calculator is required to be familiar with the equipment and grid structure, and to consider all kinds of situations in order to improve the stability of the system operation. Therefore, in order to ensure the stable operation of automatic reclosure in the circuit, it is necessary to eliminate these faults.