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Monitoring relay VRO3-18, VRO3-28
- OVER VOLTAGE MONITORING RELAYS
- THESE UNITS MONITOR A 3-PHASE 3-WIRE SUPPLY AND OPERATE RELAYS IF A PHASE-PHASE VOLTAGE GOES BELOW SET LEVELS.
- LEDS INDICATE POWER AND TRIP STATUS. A RELAY WITH TWO CHANGEOVER VOLT-FREE CONTACT IS FITTED.
- FRONT PANEL CONTROL ALLOW SELECTION OF:
- OVER VOLTAGE TRIP LEVELS.
- NOMINAL RATED VOLTAGE.
- DIFFERENTIAL VOLTAGE FOR OPERATING HYSTERESIS AND TIME DELAY BEFORE A TRIP TRIGGERS A RELAY RESPONSE.
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