芜湖变压器的拉合闸原则

芜湖变压器的拉合闸原则
    1)芜湖变压器装有芜湖变压器时，拉合闸必须使用芜湖变压器，对空载芜湖变压器也应如此。因为空载芜湖变压器被隔离开关切断的电流，可以近似地看成为电感电流，切断时产生的过电压易引起孤光波及邻相而发生短路。
    2)如未装芜湖变压器，可用隔离开关切断或接通空载芜湖变压器，隔离开关允许切断或接通的芜湖变压器的容量。
    3)芜湖变压器芜湖变压器停送电操作顺序：停电时应先停负荷侧，后停电源侧。送电时与上述相反。因为多电源的电路，按此顺序停电，可以防止芜湖变压器反充电。若停电时先停电源侧，若遇芜湖变压器内部故障，可能会造成继电保护误动或拒动，延长切除故障时间，也可能扩大停电范围。从电源侧逐级送电，若遇故障，便于按范围检查、判断及处理。
    4)在电源侧装隔离开关，负荷侧装空气芜湖变压器的电路，送电时，应先合电源侧隔离开关，后合负荷侧空气芜湖变压器；停电时，应先拉负荷侧空气芜湖变压器。后拉电源侧隔离开关。因为隔离开关只允许拉合芜湖变压器的空载电流，而负荷电流则应用空气芜湖变压器来拉合。
5)在用无励磁分接开关进行调压时，应将芜湖变压器与电网断开后，才可以改变芜湖变压器分接头的位置。在切换分接头后，必须用电桥或欧姆表检查三相电阻的一致性。
 
Transformer pull the switch on the principle of
 
    1) transformer is equipped with circuit breakers, pull the switch on using a circuit breaker on the load transformer also be the case. Load transformer isolation switch off the current, you can look at the inductor current, over-voltage cut off when could easily cause a solitary light waves and adjacent to a short circuit.
    2) if not installed circuit breakers available isolation switch to cut off or connected load transformer, isolation switch allows to cut off or connected transformer capacity.
    3) The transformer circuit breaker to stop transmission sequence of operations: power outage should first stop the load side, the latter to stop the power supply side. Power transmission, contrary to the above. Multi-power supply circuit, in this order power outage, you can prevent transformer reverse charging. Power outage, first stop the supply side, the case of transformer internal fault, it may cause malfunction or tripping relay to extend the removal time to failure, might also extend the blackout range. Step by step from the power supply side power transmission, In case of failure, easy to range check, judgment and processing.
    4) isolation switch installed in the power supply side of the load side mounted air circuit breaker, power transmission, power side of the isolating switch should be cooperation, co-load side of the air circuit breaker; power outage, you should pull the load side of the air circuit breaker. Pull power supply side of the isolation switch. Because the isolation switch is only allowed to pull together the transformer load current, while the load current is applied to the air circuit breaker to pull together.
    5) when the regulator-free circuit tap transformer to the grid should be disconnected before you can change the location of the transformer tap. Switch tap, you must use a bridge or ohmmeter to check the consistency of three-phase resistance.