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The load is receiving power even when the setpoint is zero. Why?

The load is receiving power even when the setpoint is zero. Why? Jul 24
  • Residual leakage current from the snubber network (RC circuit) can allow a few milliamps to flow, enough to make a sensitive voltmeter read a voltage. This is normal and does not deliver real power.
  • In phase-angle mode, a minimum firing angle limit may be set to avoid output instability. Adjust the minimum limit parameter.
  • Check for a damaged SCR (shorted), which would result in continuous conduction.

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