Question
Download Solution PDFWhat does NVR Coil Stand for?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDF- NVR coil stands for the No-Volt Release coil also represent by NVC. It is used in dc motor starter.
- No volt coil retains the starter knob in the last step, as far as the supply voltage is available. When supply voltage fails, the knob returns to off position.
- No Volt Coil ensures that whenever supply resumes after switching off or supply failure, the motor does not start automatically to lowest armature resistance, but starts only through current limiting resistors.
- The starter introduces large resistance initially and as the speed picks up, the starter knob is turned forward in a few steps. In the last step, the resistance is bypassed.
Last updated on Jun 11, 2025
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