Why Should The Operating Mechanism Of A High-voltage Disconnect Switch Be Located In The Middle Phase?

This high voltage isolator arrangement meets the requirements of overall structural symmetry and mechanical force balance. The middle phase position can serve as the centralized control node of the linkage mechanism. During the closing and opening operations of the three poles high voltage isolator switch, their linkage rods, spring energy storage mechanisms, and drive devices are uniformly transmitted through the middle phase, thereby reducing mechanical offset caused by the arrangement differences between the two poles. Relevant national standards stipulate that the hv isolator operating mechanism needs to have a reliable motion direction and connection mechanism design.