Where are Kirk-Key interlock systems primarily located?

Kirk-Key interlock systems are primarily used on ground switches to ensure safe operation within substations. These systems are designed to prevent accidental operation of equipment while another is in a condition that could be dangerous. In the context of ground switches, the Kirk-Key system ensures that the ground switch cannot be closed until certain safety procedures are followed, like ensuring that the circuit is de-energized.

This is critical in substations where ground switches serve to safely shunt equipment to the ground for maintenance, thus minimizing the risk of electrical shock or damage to equipment. The interlocking mechanism effectively adds a layer of safety by requiring a physical key to be removed or inserted based on the position of the equipment, thereby managing access and control systematically.

While Kirk-Key interlocks can theoretically be used in other applications, such as circuit breakers or other equipment, their primary and most crucial role is found with ground switches, where they enhance safety protocols directly related to grounding operations.