Here is what I have a drive feeding a 30 HP motor with a Killark plug & Socket as local disconnect. The Killark socket is a interlocked disconnect with an auxiliary early break contact that is part of the safety circuit to disable the drive. As soon as I move the disconnect the safe torque option engages (shuts off the IGBT's) and as I continue to open the disconnect breaks the connection to the plug & socket. At this point do I need any PPE other than work gloves to pull the plug out of the socket?
NFPA 70E & VFD Safe Torque option
- Thread starter cornbread
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petersonra
Senior Member
- Location
- Northern illinois
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- Semi-retired engineer
The safe torque off just turns off the torque. You could still conceivably still have voltage out at the connector just no torque at the motor.
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