RM22TG20 Modular 3 phase supply control relay, Harmony, 8A, 2CO, 183…528V AC

The Schneider Electric RM22TG20 is a modular 3-phase supply control relay from the Harmony Control Relays range, designed to monitor three-phase AC networks for phase sequence faults and phase loss (2 or more phases). It accepts a wide supply voltage of 183 to 528 V AC and provides 2 changeover (C/O) output contacts rated at 8 A AC for downstream control circuits.

Technical specifications:

• Commercial reference: RM22TG20
• Manufacturer: Schneider Electric
• EAN:
• Series / range: Harmony Control Relays
• Relay type: 3-phase control relay
• Monitored parameters: Phase sequence, phase loss detection (2 or more phases)
• Supply voltage: 183...528 V AC
• Supply frequency: 50...60 Hz +/- 10%
• Output contacts: 2 C/O
• Max switching current: 8 A AC
• Max switching voltage: 250 V AC
• Switching power: 2000 VA
• Response time: <= 200 ms
• Start delay on power-up: 650 ms
• Width: 22.5 mm
• Weight: 0.09 kg
• IP rating: IP20 (terminals), IP40 (housing), IP50 (front panel)
• Operating temperature: -20...60 °C at 50 Hz / -20...50 °C at 60 Hz
• Mounting: 35 mm DIN rail (IEC 60715)
• Connection: Screw terminals, up to 2 x 2.5 mm² solid or 2 x 1.5 mm² flexible
• Overvoltage category: III (IEC 60664-1, UL 508)
• Electrical durability: 100,000 cycles
• Mechanical durability: 10,000,000 cycles
• Certifications: CE, EAC, RCM, GL, CSA, UL, CCC

Features and benefits:

• Monitors phase sequence and detects phase loss across a broad 183 to 528 V AC supply range, covering international three-phase network voltages
• Cadmium-free contacts with 10,000,000 cycle mechanical durability for long, maintenance-free service life
• Built-in test button with dual LED status indicators: yellow for relay ON state and green for device powered
• Compact 22.5 mm DIN rail module mountable in any orientation, saving panel space
• High EMC immunity rated for industrial environments in accordance with IEC 61000-6-2

Applications:

• Protection of three-phase motors against damage caused by phase sequence reversal or phase loss
• Three-phase supply supervision in industrial motor control and automation panels
• Network monitoring in commercial HVAC, pump, and compressor installations
• Integration into switchgear and distribution boards requiring three-phase supply integrity checks

Compliant with IEC 60255-1, IEC 60947-5-1, IEC 60947-4-1, and EMC standards IEC 61000-6-1/2/3/4. Part of the Schneider Electric Harmony Control Relays range.

Also known as: Schneider RM22TG20, Schneider Electric RM22TG20, Harmony phase monitoring relay, 3-phase sequence control relay.