Functions: 1. This monitoring relay can monitor its own working voltage. 2. 8 types of rated voltages are adjustable and can apply to voltages in all regions of the world. 3. The working status of the relay is indicated by the LED indicator 4. Ultra small size and it is easy to install. 5. It is applied to the connection control of mobile devices and causes accidents in device protection against reverse operation, normal/emergency power switch and prevents phase failure of the power load. Specification: Condition: 100% Brand New Model: GRV8-03 Monitoring Terminal: L1-L2-L3 Power Supply: L1-L2 Selection of Rated Operating Voltage: AC220-230-240-380-400-415-440-460 (P-P) Measuring Frequency Range: 50/60Hz Measuring Range: 176V 552V voltage Threshold range: 2%-20% (rated voltage) Imbalance threshold range: 5%-15% Fixed voltage delay rate: 2% Operating indicator: green LED Action delay time: 0.1s-10s adjustable Voltage measurement error: ≤1% Switch-on delay time: 0.5s Accuracy of button setting: 1% Reset time: 1% The temperature fluctuations of Error: 0.05%C, at = 20C Output: 1 x SPDT 10A/AC250VAC Minimum switching capacity: 500mW Output relay display: Red LED Mechanical life: 100000000 Electrical life (resistive load): 10000000 Temperature of storage and transport environment: -35℃-75℃ Installation methodmethodmethod: 35-mm rail installation protection grade: IP20 Installation height: 2000 m Pollution level: 2 wiring capacity: 1 x 2.5 mm2 or 2 x 1.5 mm2 Optional style: M460, M265 Weight approx. 76 g / 2.7 oz. Size: approx. 90 x 18 x 64 mm / 3.5 x 0.7 x 2.5 inches. Package list: 1 x surveillance relay