Of course. Here is a comprehensive overview of the Geya GRV8-10 Voltage Monitoring Relay.
Geya GRV8-10 Voltage Monitoring Relay - Overview
The Geya GRV8-10 is a compact, single-phase voltage monitoring relay designed to protect electrical equipment from damage caused by abnormal voltage conditions in a power supply. It is a crucial component in automation control systems for ensuring the safe and efficient operation of compressors, pumps, conveyor systems, HVAC units, and other sensitive machinery.
Key Features
Wide Adjustable Range: Allows for precise setting of under-voltage (UV) and over-voltage (OV) trip points to match the specific requirements of the connected load.
Adjustable Time Delay: Features a built-in adjustable delay timer (0.1s ~ 10s) to prevent nuisance tripping caused by short-term voltage fluctuations or transient spikes (e.g., during motor startup).
LED Status Indication: Clear visual indicators for power status and relay output state, making diagnostics quick and easy.
Compact DIN Rail Mounting: Standard 35mm DIN rail design (fits in a 17.5mm space) allows for easy and space-efficient installation in control panels.
Manual Reset Function (Models with "R"): Certain models (e.g., GRV8-10R) include a manual reset feature. After a trip, the relay must be manually reset, ensuring an operator investigates the fault before restarting.
High Accuracy: Provides reliable and precise monitoring of the supply voltage.
Technical Specifications (Typical)
| Parameter | Specification |
|---|---|
| Power Supply Voltage | 48 ~ 440V AC (single-phase), 50/60Hz |
| Power Consumption | < 2VA |
| Under-Voltage (UV) Range | Adjustable, typically 50% ~ 100% of Un (e.g., 100V ~ 220V for a 220V system) |
| Over-Voltage (OV) Range | Adjustable, typically 100% ~ 130% of Un (e.g., 220V ~ 280V for a 220V system) |
| Time Delay | Adjustable, 0.1 seconds ~ 10 seconds |
| Output Relay | 1 CO (Changeover) contact - SPDT (Single Pole, Double Throw) |
| Contact Rating | 8A @ 250V AC / 8A @ 30V DC |
| Electrical Life | 100,000 cycles |
| Mounting | 35mm DIN Rail |
| Operating Temperature | -25°C ~ +55°C |
| Storage Temperature | -40°C ~ +70°C |
| Safety Standards | CE certified |
Note: Always consult the official Geya datasheet for the specific model you have, as specifications can change.
Function and Operation
The GRV8-10 continuously measures the incoming single-phase line voltage (connected to terminals L and N).
Normal Operation: When the voltage remains within the user-set acceptable range (between the UV and OV thresholds) for the entire duration of the time delay, the output relay is energized. The NC (Normally Closed) contact opens, and the NO (Normally Open) contact closes.
Fault Condition (Under-Voltage or Over-Voltage): If the measured voltage drops below the UV setpoint or rises above the OV setpoint...
Time Delay Activation: The internal timer starts. If the fault condition persists for the entire duration of the adjustable time delay, the relay de-energizes.
Output Change: The relay's state changes:
The NO contact opens.
The NC contact closes.
This change can be used to disconnect a contactor (stopping the motor) or signal a PLC/ alarm system.
Auto-Recovery: Once the voltage returns to the normal range and remains stable for the time delay period, the relay will automatically return to its normal state and re-energize the output (unless it's a manual reset model).https://store.unigulfsupply.com/product/voltage-monitoring-relay/