Features of Schneider Barrier Switch: First of all, Schneider Barrier Switch can be used to block the power supply, it can disconnect the live equipment from the high-voltage maintenance equipment, and can also see the obvious disconnection point on it. Secondly, the Schneider barrier switch can cooperate with the circuit breaker to achieve the purpose of changing the wiring method of system operation. Schneider block switches turn small current circuits on or off. In the high-voltage power distribution equipment, the barrier switch is more used, which can well ensure the safety of maintenance work.
Regarding the operation essentials of Schneider barrier switches, here Kexu Xiaobian will answer for you. It is divided into 3 parts. It contains the operation essentials when the barrier switch is closed, the barrier switch is opened, and the barrier switch is equipped with electromagnetic locking when the lock fails.
When performing the reverse operation, the operator must carefully check the true disconnection position of the circuit breaker. For the three-phase linkage barrier switch, the three-phase rise and fall should be at the same time, and the difference should not be greater than 3mm, so that the opening and closing operation of the barrier switch is allowed.
1. Essentials of barrier switch closing
If it is a manual operation, the operator should first dial out the interlocking pin and then close, the beginning should be slow, and when the moving contact is close to the static contact, it should be closed quickly to prevent arc light. If an arc occurs at the beginning of closing, the barrier switch should be closed immediately, and the operator is prohibited from pulling the barrier switch back, because the pullback will expand the arc light and cause further damage to the equipment. At the end of closing, the force should not be too strong to prevent the closing from being too deep and causing damage to the supporting porcelain bottle. After the barrier switch is closed, the operator should carefully check whether the closing is outstanding and whether the moving contact has completely entered the static contact, so as to prevent the dynamic and static contact from heating due to poor touch. For the reversing barrier switch on the rotating shaft, the blade should be on the plane of the straight fixed contact after closing, so as to ensure the pressure at the contact and the necessary touch resistance; For casement barrier switches, the blade should be turned to a horizontal position after closing, and its arm should be straightened. If the movable cap of the static contact is to the right, it means that the hammer rod of the moving contact arm is too closed.
When operating the outdoor barrier switch in winter, the freezing ice and frost and snow on the contact can be rubbed off by several times of connection and disconnection, so that the barrier switch can ensure that the dynamic and static contacts are excellent after closing. The condition for the reliable operation of the barrier switch is that when the barrier switch has transmission equipment, it should be ensured by its correct adjustment; If there is no transmission equipment, the correct operation of the insulating rod should be ensured. Barrier switches of various specifications are not allowed to fall off actively in the event of a short circuit, so the barrier switch should be locked with five anti-locking equipment when closing the direction. The personnel on duty need to carefully check these equipment, buckle the barrier switch with a pin after each barrier switch is closed, and lock the five-proof locking equipment to prevent the barrier switch from actively disconnecting and forming an accident.
2. The essentials of barrier switch opening operation
When the moving contact leaves the static contact, if an arc occurs, the operator should immediately close the barrier switch and stop the operation. However, when the small load current and charging current are blocked, the arc will occur when the barrier switch is opened, and the barrier switch should be disconnected quickly in order to eliminate the arc smoothly. At the end of the brake, it should be slow, this is to prevent the impact force on the damage to the supporting porcelain bottle and the operating mechanism, * after the operation personnel should check whether the interlocking pin is pin well. After the barrier switch is opened, the operator should carefully check the true disconnection direction of the barrier switch, the air insulation distance of the disconnection should be qualified, and check that the moving contact has indeed been pulled to the end, and the point of view of the swing should comply with the rules of the manufacturer. For indoor barrier switches, if the disconnected insulation distance is not enough, the insulating partition should be pierced, otherwise a discharge short circuit accident will occur on the live side and the side of the ground wire in case of power failure.
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