First, the introduction of automatic reclosing
      The automatic reclosing device is an automatic device that automatically inputs the circuit breaker after the fault has been turned off as needed.
Second, the basic requirements for automatic reclosing 1, rapid action 2, does not allow any multiple coincidence 3, should be able to automatically return after the action 4, manual trip should not coincide 5, manual closing and faulty lines do not coincide
Third, the automatic reclosing start mode 1, does not correspond to the starting mode: the position of the circuit breaker control switch and the actual position of the circuit breaker does not correspond to the starting mode. That is, when the control switch is in the closing position and the circuit breaker is actually in the off position, the reclosing is started; and when the operator manually operates to make the circuit breaker trip, the position of the control switch and the circuit breaker is corresponding, then coincide The brake does not start.
2. Protect the starting method.
Fourth, the classification of automatic reclosing:
1. According to the different power components connected or disconnected by the reclosing control circuit breaker, it can be divided into: line reclosing, transformer reclosing and bus reclosing.
2. According to the difference of the number of consecutive trips of the recloser control circuit breaker, it can be divided into: multiple reclosing and one reclosing.
3. According to the difference of the number of phases of the reclosing control circuit breaker, it can be divided into: single-phase reclosing, three-phase reclosing, and integrated reclosing.
V. Automatic reclosing function 1. For transient faults, the power supply can be quickly restored, thus improving the reliability of the power supply.
2. For the line of the double-sided power supply, the stability of the parallel operation of the system can be improved, thereby improving the transmission capacity of the line.
3. It can correct the false trip caused by the malfunction of the circuit breaker or relay protection.
Sixth, the shortcomings of automatic reclosing 1, the power system is once again affected by the failure;
2. Deteriorating the working conditions of the circuit breaker (because the short-circuit current is cut off twice in a short time).
For the overhead line of 1KV and above or the mixed line of cable and overhead line, as long as the circuit breaker is installed, automatic reclosing should be installed.
      The automatic reclosing device is an automatic device that automatically inputs the circuit breaker after the fault has been turned off as needed.
Second, the basic requirements for automatic reclosing 1, rapid action 2, does not allow any multiple coincidence 3, should be able to automatically return after the action 4, manual trip should not coincide 5, manual closing and faulty lines do not coincide
Third, the automatic reclosing start mode 1, does not correspond to the starting mode: the position of the circuit breaker control switch and the actual position of the circuit breaker does not correspond to the starting mode. That is, when the control switch is in the closing position and the circuit breaker is actually in the off position, the reclosing is started; and when the operator manually operates to make the circuit breaker trip, the position of the control switch and the circuit breaker is corresponding, then coincide The brake does not start.
2. Protect the starting method.
Fourth, the classification of automatic reclosing:
1. According to the different power components connected or disconnected by the reclosing control circuit breaker, it can be divided into: line reclosing, transformer reclosing and bus reclosing.
2. According to the difference of the number of consecutive trips of the recloser control circuit breaker, it can be divided into: multiple reclosing and one reclosing.
3. According to the difference of the number of phases of the reclosing control circuit breaker, it can be divided into: single-phase reclosing, three-phase reclosing, and integrated reclosing.
V. Automatic reclosing function 1. For transient faults, the power supply can be quickly restored, thus improving the reliability of the power supply.
2. For the line of the double-sided power supply, the stability of the parallel operation of the system can be improved, thereby improving the transmission capacity of the line.
3. It can correct the false trip caused by the malfunction of the circuit breaker or relay protection.
Sixth, the shortcomings of automatic reclosing 1, the power system is once again affected by the failure;
2. Deteriorating the working conditions of the circuit breaker (because the short-circuit current is cut off twice in a short time).
For the overhead line of 1KV and above or the mixed line of cable and overhead line, as long as the circuit breaker is installed, automatic reclosing should be installed.
Auto Transfer Switch,Automatic Transfer Switch,Emergency Transfer Switch,Automatic Changeover Switch
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