Interlocking Design Of High-voltage Disconnect Switches And Grounding Devices

Mechanical interlocking devices are usually installed in the transmission mechanism between the drive shaft of hv isolator switch and the grounding device. They achieve positional constraints through components such as connecting rods and crank arms, preventing the grounding device of high voltage electrical isolator from rotating under specific conditions.

Electrical interlocking designs, on the other hand, utilize auxiliary contacts, relays, and other electrical components to confirm and provide feedback on the status of each switching device at the control circuit level. This method is commonly found in isolator high voltage equipment, and is used in conjunction with mechanical interlocks to improve the consistency of overall linkage response and control flexibility.