| Brand | MV Switchgear Accessories |
| Model NO. | GRV8-1UVS Single Phase Under Voltage Relay |
| Rated frequency | 45Hz-65Hz |
| Series | GRV8 |
Precise Voltage Monitoring: Utilizes True RMS measurement for accurate voltage detection across diverse power conditions.
Adjustable Settings: Customize under voltage thresholds and trip delays to suit specific application needs.
Broad Frequency Compatibility: Operates effectively within a 45Hz to 65Hz range, accommodating various power systems.
Visual Feedback: Integrated LED indicators provide clear, real-time status updates for quick diagnostics.
Space-Saving Design: Compact 1-MODULE format with DIN rail mounting for easy integration into control panels.
The GRV8-1UVS is a high-performance single phase under voltage relay engineered to safeguard critical equipment from damaging voltage drops. Ideal for industrial, commercial, and HVAC applications, this relay ensures reliable protection for sensitive loads like motors, compressors, and air conditioning systems. With its compact design and advanced monitoring capabilities, the GRV8-1UVS is a trusted solution for maintaining operational stability.
Rated Voltage: AC 220V / 230V / 240V
Frequency Range: 45Hz – 65Hz
Measurement Accuracy: <1%
Under Voltage Range: Adjustable (e.g., 160V – 210V)*
Trip Delay Time: Adjustable (e.g., 0.1s – 10s)*
| Item | GRV8-1UVS |
| Function | Under voltage |
| Monitoring terminials | L-N |
| Supply terminals | L-N |
| Rated supply voltage(Un) | 220V/230V/240V |
| Rated supply frequency | 45Hz-65Hz |
| Under voltage threshold | S:70%-95%of Un |
| Trip delay time(Tu) | 0.1s |
| Hysteresis | 5V |
| Measurement error | ≤1% |
| Power on delay time(Td) | Adjustable: 5min-15min |
| Recovery delay time(Tr) | Adjustable: 5min-15min |
| Konb setting accuracy | 10% of scale value |
| Supply indication | green LED |
| Output indication | red LED |
| Output | 1×SPDT |
| Current rating | 10A/AC1 |
| Switching voltage | 250VAC/24VDC |
| Mechanical life | 1*107 |
| Electrical life(AC1) | 1*105 |
| Operating temperature | -20℃ to +55℃（-4℉ to 131℉） |
| Storage temperature | -35℃ to +75℃（-22℉ to 158℉） |
| Mounting/DIN rail | Din rail EN/IEC 60715 |
| Protection degree | IP40 for front panel/IP20 terminals |
| Operating position | any |
| Overvoltage category | III |
| Pollution degree | 2 |
| Max.cable size（mm²） | solid wire max.1*2.5 or 2*1.5/with sleeve max.1*2.5（AWG 12） |
| Tightening torque | 0.8Nm |
| Dimensions | 90×18×64mm |
| Weight | 63g,65g |
| Standards | EN 60255-1,IEC60947-5-1 |
Trip Delay Time: Adjustable (e.g., 0.1s – 10s)*
