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Top rated phase monitoring relays
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Best overall
Omron K8AK-PH Phase Loss/Phase Sequence Relay
Reliable phase monitoring with adjustable voltage range, widely used in industrial settings.
- Highly durable
- Easy to wire
- Adjustable settings
- Slightly bulky
- No phase imbalance detection
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Best value
Eaton RMQ-Titan Phase Monitoring Relay (280-500V AC)
Compact design with phase loss and sequence protection, ideal for motor protection.
- Compact size
- Good price
- Wide voltage range
- LED indicator dim
- Limited to basic protection
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Best for heavy-duty use
Allen-Bradley 849-C Phase Monitor Relay
Robust industrial relay with phase loss, reversal, and imbalance detection.
- High reliability
- Comprehensive protection
- Long lifespan
- High price
- Large footprint
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Best budget pick
Macromatic TE Series Phase Monitoring Relay (THR-PLDU)
Affordable and compact relay for basic phase loss and sequence monitoring.
- Low cost
- Small size
- Simple installation
- No imbalance feature
- Lower voltage rating
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Best premium
Schneider Electric RM22TG20 Phase Control Relay
Advanced relay with adjustable thresholds and tripping delays for precise monitoring.
- Adjustable settings
- High accuracy
- Good build quality
- Higher cost
- Complex setup
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Best for single-phase applications
Omron K8AK-PW Phase Sequence and Loss Relay
Monitors phase sequence and loss for single-phase systems with compact DIN rail mount.
- Compact
- Works with single phase
- Good value
- Not for three-phase
- Limited availability
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Best for advanced features
Carlo Gavazzi DPA01CM44 Phase Monitoring Relay
Offers phase loss, sequence, imbalance, and under/overvoltage protection.
- Multiple protections
- Adjustable trip delay
- Wide voltage range
- Costly
- Large size