| Brand | MV Switchgear Accessories |
| Model NO. | GRV8-SV Voltage Sensing Relay |
| Rated frequency | 45Hz-65Hz |
| Series | GRV8 |
The GRV8-SV Voltage Sensing Relay monitors voltage levels. It acts when voltage is too high or too low. This protects your equipment from damage and prevents costly downtime. It’s designed for industry, agriculture, and transportation. Its DIN rail mounting is simple. It takes up little space. An intuitive LCD shows voltage data. It measures voltage accurately with true RMS. You can count on its accuracy and reliability.
Product Highlight:
Dual Voltage Protection: Safeguards against over-voltage and under-voltage, keeping your equipment within safe operating limits.
True RMS Measurement: Provides accurate voltage readings with ±1% precision for dependable monitoring.
Normal/Emergency Power Switching: Seamlessly transitions between power supplies, ensuring uninterrupted operation.
Real-Time LCD Display: Offers clear, instant visibility of voltage levels and system status.
Compact Design: 2-module width with DIN rail mounting for easy integration into control panels.
The GRV8-SV voltage sensing relay, with its dual voltage protection, True RMS high-precision measurement, real-time LCD display, compact design, wide applicability, high durability, certified quality, and user-friendly features, is the ideal choice for protecting equipment from voltage fluctuations and ensuring stable system operation.
| Model | GRV8-SV |
| Function | Over voltage, under voltage |
| Rated supply voltage | AC/DC110V…240V |
| Rated supply frequency | 45~65Hz,0Hz |
| Operation voltage range | 50V~350V |
| Burden | AC max.3VA |
| Over voltage operation value | 65V~300V,OFF |
| Under voltage operation value | OFF,65V~300V |
| Over/under voltage action delay | 0.1s~20s |
| Power-up delay | 0.5s~300s |
| Reset time | 0.5s~300s |
| Measurement error | ≤1% |
| Output | 2×SPDT |
| Current rating | 8A/AC1 |
| Switching voltage | 250VAC/24VDC |
| Electrical life(AC1) | 1×107 |
| Mechanical life | 1×105 |
| Operating temperature | -20℃ ~ +60℃ |
| Storage temperature | -35℃ ~ +75℃ |
| Mounting/DIN rail | Din rail EN/IEC 60715 |
| Protection degree | IP40 for front panel/IP20 terminals |
| Operating position | any |
| Overvoltage cathegory | III |
| Pollution degree | 2 |
| Max.cable size(mm²） | solid wire max.1×2.5or 2×1.5/with sleeve max.1×2.5(AWG 12) |
| Tightening torque | 0.4Nm |
| Dimensions | 82*36* 68mm |
| Weight | 100g |
| Standards | EN 60255-1,IEC60947-5-1 |
| Parameter | Range | Step value | Factory settings |
| Over voltage value | 65V~300V,OFF | 1V | 253V |
| Over voltage recovery value | 60V~295V | 1V | 248V |
| Under voltage value | OFF,65V~300V | 1V | 187V |
| Under voltage recovery value | 70V~305V | 1V | 192V |
| Voltage fault action time | 0.1s~20s | 0.1s | 2s |
| Power on delay time | 0.5s~300s | 0.1s/1s | 0.5s |
| Reset time | 0.5s~300s | 0.1s/1s | 1s |
| Fault reset | ON-OFF | / | ON |
