METZ Connect Phase Monitoring Relay 3-Phase 200-400 V AC 2 Changeover Contacts DIN Rail 110292032230

In industrial control panels, a phase failure or voltage imbalance can bring production to a halt and damage connected motors. The METZ Connect phase monitoring relay continuously watches a 3-phase AC supply from 200 to 400 V, and its two changeover contacts react instantly to phase sequence errors, phase loss, undervoltage, or overvoltage. This self-supplied unit mounts on a DIN rail and provides adjustable thresholds and delay times for precise protection.

Key specifications

• Monitored voltage: 3 x 200 – 400 V AC, 50/60 Hz
• Monitoring functions: phase sequence, phase failure, undervoltage, overvoltage
• Output: 2 changeover contacts (SPDT), rated 5 A at 250 V AC resistive
• Supply: self-powered from monitored voltage
• Mounting: DIN rail (EN 60715), screw terminals
• Adjustable: undervoltage threshold, overvoltage threshold, hysteresis, delay time
• Operating temperature: -20 °C to +55 °C
• Protection: IP20, self-extinguishing thermoplastic housing
• LED status indication

Why choose it

This relay eliminates the need for a separate power supply, simplifying installation and reducing wiring. Its two independent changeover contacts allow flexible integration into control circuits, alarms, or load shedding. The adjustable thresholds and delay prevent nuisance tripping from brief voltage fluctuations, while the wide voltage range covers common industrial mains.

Ideal use cases

• Protecting three-phase motors in pumps, compressors, and conveyors
• Monitoring incoming mains in distribution boards and control panels
• Automatic transfer switching or load shedding on phase anomalies
• HVAC and refrigeration equipment requiring phase integrity

Good to know

Installation is straightforward: snap onto a 35 mm DIN rail, connect the three phases and output wiring to the screw terminals. The LED provides clear status at a glance. The compact housing saves panel space, and the self-extinguishing material enhances safety. For best results, set the thresholds according to the connected equipment's tolerance.