Key Points For Opening High Voltage Isolating Switch

When pulling open the High Voltage Disconnect Switch, you should keep a slow and cautious action at first, especially at the moment when the blade is about to leave the fixed contact, you need to complete the operation quickly and decisively. This is because when cutting off the no-load current of the transformer, the charging current of the overhead line and cable, the small load current of the overhead line, and the loop current, quickly pulling open the disconnector is essential for rapid arc extinguishing. In addition, after the disconnector is fully pulled open, be sure to carefully check to ensure that each item is in the disconnected state, and at the same time pull the blade as far as possible.