Isolator switch, commonly referred to as “isolator” in the power system, is a type of high-voltage switchgear without arc extinguishing capability. Its primary function is to create a visible and reliable air insulation gap after the circuit is disconnected, ensuring the safety of maintenance personnel.
Its main functions and features are as follows:
1. Core function: Safety isolation
Establish visible break point: When the isolator switch is disconnected, there is a distinct air gap between the contacts, allowing maintenance personnel to visually confirm that the circuit has been disconnected, thereby confirming that the equipment is “electrically unpowered” and ensuring personal safety.
Switching operation: It is used in conjunction with circuit breakers to switch circuits (such as switching a line from one bus to another), but must be performed after the circuit breaker has been disconnected.
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