Normal Inspection Of High Voltage Isolating Switch

⑴ Whether the porcelain insulation is intact without cracks and discharge imagination.
⑵ Whether the operating connecting rod and parts have open welding, deformation, rust, looseness, falling off, etc., and whether the nuts fastened by the connecting shaft pins are intact.
⑶ Whether the locking device is intact, whether the pins are locked, whether the auxiliary contacts are in the correct position and in good contact, and whether the grounding of the mechanism housing is good.
⑷ When the hv isolator switch with a grounding knife is grounded, whether the three-phase grounding knife switch has good contact.
⑸ After the high voltage electrical isolator is closed, whether the two contacts are completely in the knife mouth, whether the contact between the contacts is good, and whether the temperature exceeds 70℃ at the rated current.
⑹ After the short-circuit current passes through isolator high voltage, check whether the insulator of high voltage isolator is damaged and has discharge marks, and whether the moving and static contacts and joints are melted.