High Voltage Disconnect Switch Installation

High Voltage Isolator Switch, when installed outdoors, it should be installed horizontally so that the supporting porcelain bottle with a porcelain skirt can really play a role in rain protection; when the indoor type isolating switch is installed vertically, the static contact is on the top, and the sleeve can be installed at a certain angle. Under normal circumstances, the static contact is connected to the power supply and the moving contact is connected to the load, but when the isolating switch installed in the power receiving cabinet uses a cable input, the power supply is on the moving contact side. This connection method is commonly known as "reverse fire". The connection between the two sides of the isolating switch and the busbar and cable should be firm. When there is contact with copper and aluminum conductors, copper-aluminum transition joints should be used to prevent electrochemical corrosion.
The moving and static contacts of the isolating switch should be aligned, otherwise there will be a side-hit phenomenon when closing the switch, which will make the contact surface pressure of the moving and static contacts uneven after closing, resulting in poor contact.
The operating mechanism and transmission machinery of the isolating switch should be adjusted so that the opening and closing operations can be carried out normally without resistance. It is also necessary to meet the requirements of three-phase synchronization, that is, the three-phase moving contacts act simultaneously when opening and closing, and the deviation of different phases should be less than 3MM. In addition, when in the closed position, the moving contact must have a sufficient penetration depth to ensure that the contact area meets the requirements, but it is not allowed to close too hard. The moving contact is required to have a gap of 3 to 5MM from the base of the static contact, otherwise the supporting porcelain bottle of the static contact will be broken when the switch is closed too hard. When in the open position, there must be a sufficient distance between the moving and static contacts to effectively isolate the live parts. This distance should not be less than 160MM, or the open angle between the moving contact and the static contact should not be less than 65 degrees.