Explanation Of Situations Where High-voltage Disconnect Switches Are Stuck And Cannot Be Rotated.

During operation of high voltage isolator, if high voltage isolator switch cannot be turned during operation, the following situations may occur:

• The transmission mechanism's shaft pins, connecting rods, crank arms, etc., may be corroded or jammed due to long-term exposure to humid or corrosive environments. This causes mechanical resistance when the operating handle is turned, restricting the mechanism's movement.

• The contact root or the perforated pin on the shaft may be corroded, or the spring clamping function may fail, increasing the friction between the stationary and moving contacts, making closing or opening operations extremely difficult.

• Aging of electrical circuit control components, disconnection of control power supply, malfunction of limit switches or auxiliary switches may cause the mechanical transmission to start but be locked due to inadequate feedback positioning, making it difficult to turn the operating handle.

• Poor contact, aging or severe wear of conductive circuit connections may cause overheating, deformation, or welding cracks, altering the mechanism's original movement trajectory, resulting in a stiff feel and difficulty in turning during operation.