3-Phase Voltage Monitoring Relay, 145-500 VAC, 2 C/O is a digital voltage monitoring relay designed for 3-phase supply protection in industrial control panels. It monitors phase loss, phase sequence, phase asymmetry, under voltage, and over voltage across a 145-500 VAC range. Two changeover outputs provide flexible alarm and trip handling for critical loads.
🔧 Technical Highlights:
- Supply voltage: 145-500 VAC, 45-65 Hz
- Monitoring functions: phase loss, phase sequence, phase asymmetry, under voltage, over voltage, under frequency, and over frequency
- Relay outputs: 2 x C/O, 5 A resistive at 240 V AC / 30 V DC
- Connections: 3-wire or 4-wire systems
- Mounting: base or DIN rail, 36 x 90 x 67 mm housing
✅ Benefits:
- Dual outputs support separate alarm and control actions
- Settable voltage and frequency thresholds help match site conditions
- Compact housing suits standard industrial panel builds
🚀 Applications:
- Motor starter and pump protection panels
- HVAC, compressor, and refrigeration controls
- OEM machinery and 3-phase distribution monitoring
Designed for dependable 3-phase voltage supervision where two independent output actions are needed.
FAQs
- Q: What is the difference between this model and single-output variants?
A: This version provides two changeover outputs, allowing separate alarm and trip functions from the same monitoring relay. - Q: What supply range does it cover?
A: It is designed for 145-500 VAC 3-phase systems at 45-65 Hz.