Schneider isolation switch operation essentials

Schneider barrier switch features: First of all, Schneider barrier switch can be used to block the power supply, it can disconnect live equipment and high voltage maintenance equipment, but also can see a significant disconnect point. The second is that the Schneider barrier switch can cooperate with the circuit breaker, in order to achieve the purpose of changing the system running wiring mode. Schneider block switch can turn on or off a small current circuit. Barrier switch is used more in high voltage distribution equipment, it can ensure the safety of maintenance work.

About the operation method of Schneider barrier switch, here Ke Xu Xiaobian to answer for you. It is divided into three parts. The operation method includes blocking switch closing, blocking switch opening and blocking switch closing failure equipped with electromagnetic locking.

The operator must carefully check the true opening position of the circuit breaker when performing the reverse operation. On the three-phase linkage barrier switch, the three-phase takeoff and landing should be at the same time, the difference should not be greater than 3mm, the party agreed to carry out the barrier switch on and off operation.

1. Blocking switch closing operation method

If it is manually operated, the operator should first pull out the chain pin and then close it. The beginning should be slow. When the moving contact is close to the static contact, it should be quickly closed to prevent the arc. If the arc is generated at the beginning of closing, the barrier switch should be immediately closed, and the operator is prohibited to pull the barrier switch back again, because the pull back will make the arc light expansion, forming further damage to the equipment. At the end of the closing force is not too strong, to prevent the closing too deep, so that the support porcelain bottle damaged. After the barrier switch is closed, the operating personnel should carefully check whether the closing is outstanding and whether the moving contact is completely entered into the static contact, in order to prevent the heat caused by the bad touch. On the rotating shaft reversal barrier switch, after closing should make the blade in the vertical fixed contact plane, so as to ensure the pressure at the contact and the necessary touch resistance; For the open barrier switch, the blade should be turned to the horizontal position after closing, and the arm should be straight. If the moving cap mouth of the static contact is to the right, it means that the hammer rod of the moving contact arm is closed too much.

When the field barrier switch is operated in winter, the ice and frost on the contact head can be friction off by connecting and disconnecting several times, so that the barrier switch can be closed to ensure that the dynamic contact touch outstanding. The condition of reliable operation of the barrier switch is that when the barrier switch has transmission equipment, it should be adjusted correctly to ensure; If there is no transmission equipment, it should be ensured by the correct operation of the insulation rod. Various specifications of the barrier switch are not allowed to automatically fall in the short circuit, therefore, the barrier switch in the closing position, should be locked with five anti-locking equipment. The personnel on duty need to carefully check these devices, and use the dowel to lock the blocking switch after each closing of the blocking switch, and lock the five anti-blocking equipment to prevent the blocking switch from automatically disconnecting and forming trouble.

2. Blocking switch opening operation method

When the barrier switch is spread out, the beginning should be slow and cautious. When the moving contact leaves the static contact, if there is an arc, the operator should immediately close the barrier switch and stop the operation. But in the blocking of small load current and charging current, swing block switch will have arc, at this time should be quickly block switch off, in order to eliminate the arc. At the end of the pull should be slow, in order to prevent the impact force on the support porcelain bottle and operating organization damage, * after the operation personnel should check whether the chain pin is good. After the barrier switch is opened, the operator should carefully check the barrier switch is really disconnected position, the air insulation distance should be qualified, and see that the moving contact has indeed been pulled to a limit, and the view should conform to the provisions of the manufacturer. As for the indoor barrier switch, if the disconnect insulation distance is not good, it should be pierced into the insulation partition, otherwise the live side and the side of the power failure hanging ground wire will generate discharge short circuit.