KIRK® safety interlocks protect the safety of your employees and equipment by ensuring a predetermined sequence of operations is followed every time, without fail. When performing maintenance on or emptying hoppers, electrodes in excess of 10,000 volts present a serious risk to life. To ensure the safety of employees performing maintenance, it is imperative that the hazardous energy is isolated and cannot be inadvertently re-energized during maintenance procedures. KIRK trapped key interlocks ensure that the power is isolated and grounded before hopper doors can be accessed. A typical ESP application includes trapped key interlocks on switchgear, transfer switches, access doors, and valves.