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Recent content by CCST3

  1. CCST3

    Disconnect on VFD output

    The disconnect is an NEC safety issue. It should be there. However, disconnecting a VFD under load is not healthy for the drive. Use a disconnect switch with (or a field adder) "early break" contacts. Wire into drive logic to gain a head start for a VFD "controlled shutdown" before the...
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