Specifications General Product Type: Three‑phase monitoring relay Series: Harmony Control Relays Model: RM22TR33 Mounting: DIN rail (35 mm) Application: Monitoring voltage and phase conditions in three‑phase systems Electrical Ratings Supply/Measurement Voltage Range: Designed for 380 – 480 V AC three‑phase systems Operating Frequency: 50/60 Hz Output Contact Type: Two changeover (DPDT) relay contacts Output Rating: Designed to switch load currents (e.g., up to ~8 A at rated voltage) Maximum Switching Capacity: Suitable for typical control and signaling loads Protection & Monitoring Functions Phase Sequence Detection: Monitors correct order of phases Phase Loss Detection: Detects loss of one or more phases Overvoltage Monitoring: Detects when line voltage exceeds set threshold Undervoltage Monitoring: Detects when line voltage falls below set threshold Adjustable Delay: Time delay on fault condition, adjustable to control response timing Indicators: Visual LEDs for power, relay output status, and fault indication Mechanical & Environmental Width: Compact slim module suitable for panel DIN rails Terminal Type: Screw terminals for secure wiring Operating Temperature Range: Designed for typical industrial environments Housing Protection: Suitable for control panel indoor use Durability: Engineered for reliable performance over repeated cycles