Feature: 1. Used for power supply voltage measurement and protection, dual bus wiring designs bring more strong capability 2. Voltage relay support self-reset after failure, very practical, you can use with confidence 3. Relay status is indicated by LED, you can read clearly in short time, helps a lot 4. The product have stable structure and excellent performance, small size is easy to install 5. 3‑Phase display voltage relay is a necessary medium and low voltage equipment, very useful Specification: Item Type: 3-Phase Display Voltage Relay Technical Parameters: GRV8-SN Function: Monitor 3-phase voltage Monitoring Terminal: L1-L2-L3-N Voltage Range(Un): 127-132-138-220-230-240-254-265 (P-N) Rated Power Frequency: 45Hz-65Hz Measuring Range: 70V-400V Measurement Error: ≤1% Hysteresis: 2% Phase Failure Value: 50% of Un Time Deviation: ≤5% Temperature Coefficient: 0.05%/℃, = 20℃(0.05%℉, = 68℉) Output: 2xSPDT Rated Current: 8A / AC1 Switching Voltage: 250V AC / 24V DC Minimum DC Breaking Capacity: 500mW Mechanical Life: 1x10 ^ 7 Electrical Life (AC1): 1x10 ^ 5 Working Temperature: -20℃ to +55℃ (-4℉ to 131℉) Storage Temperature: -35℃ to +75℃ (-220℉ to 158℉) Installation/DIN Rail: DIN rail EN/IEC 60715 Protection Level: Front panel IP40 / IP20 terminal Working Position: Any Overvoltage Treatment: lll Pollution Degree: 2 Maximum Cable Size (mm²): Solid wire maximum 1x2.5 or 2x1.5 / with sleeve maximum 1x2.5 (AWG 12) Tightening Torsion: 0.4Nm. Package List: 1 x 3-Phase Display Voltage Relay1 x User Manual