1. Product Overview
The Garosa GRV8-01 is a compact single-phase voltage monitoring relay designed for industrial and electrical control applications. It provides real-time monitoring of AC/DC voltage to detect over-voltage and under-voltage conditions. The device features adjustable voltage thresholds, hysteresis, and delay times, allowing for precise control and protection of electrical equipment. Its small size and 35mm DIN rail mounting make it suitable for various installations.
Key features include:
- Real-time monitoring of true RMS voltage.
- Adjustable over-voltage and under-voltage thresholds.
- Adjustable hysteresis to prevent frequent switching.
- Adjustable action delay time (0.1s-10s).
- LED indicators for power and output relay status.
- Compact design for 35mm DIN rail installation.
2. Safety Information
Please read and understand all safety instructions before installing or operating this device. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Qualified Personnel Only: Installation and maintenance should only be performed by qualified electrical personnel.
- Disconnect Power: Always disconnect power to the circuit before installing, wiring, or performing any maintenance on the relay.
- Proper Wiring: Ensure all wiring connections are secure and comply with local and national electrical codes. Use appropriate wire gauges.
- Environmental Conditions: Do not expose the device to moisture, excessive heat, or corrosive environments.
- Rated Specifications: Do not exceed the rated voltage, current, or temperature specifications of the device.
3. Product Diagram
This image shows the Garosa GRV8-01 voltage monitoring relay. Visible components include the A1 and A2 power terminals, output relay terminals (11, 12, 14), and three adjustment knobs for setting voltage parameters and delay time. Green and red LEDs indicate power and relay status, respectively. The device is designed for 35mm DIN rail mounting.
4. Setup and Installation
4.1 Mounting
The GRV8-01 relay is designed for installation on a standard 35mm DIN rail. Simply clip the device onto the DIN rail in your electrical enclosure. Ensure it is securely fastened.
4.2 Wiring
Refer to the wiring diagram printed on the side of the device for precise connections. Ensure all connections are tight and correct before applying power.
- Power Supply (Monitoring Terminal): Connect the power supply to terminals A1(+) and A2(-). Ensure the rated power supply voltage of your specific GRV8-01 model matches your system (e.g., AC220V, DC12V, AC/DC24V-48V, or AC/DC110V-240V).
- Output Relay: The device features a Single Pole Double Throw (SPDT) output relay. Connect your controlled equipment to terminals 11 (Common), 12 (Normally Closed), and 14 (Normally Open) as required by your application. The output is rated for 10A/AC1 250VAC / 24VDC.
- Wire Specifications: The device supports wiring with 1 x 2.5mm² or 2 x 1.5mm² conductors.
5. Operating Instructions
Once installed and wired, the GRV8-01 relay monitors the input voltage. Use the front panel knobs to configure its operation.
5.1 Setting Parameters
The device has three adjustment knobs:
- 'U' Knob (Voltage Threshold): This knob sets the over-voltage or under-voltage threshold. Rotate it to select the desired voltage level at which the relay should react. The specific range depends on the model (e.g., 180V-280V for AC220V models).
- 'H' Knob (Hysteresis): This knob adjusts the hysteresis value, typically between 5% and 20%. Hysteresis prevents the relay from rapidly switching on and off when the monitored voltage fluctuates around the set threshold. A higher hysteresis value means a larger voltage difference is required for the relay to reset after activation.
- 'Tt' Knob (Action Delay Time): This knob sets the delay time for the relay's action, ranging from 0.1s to 10s. This delay helps prevent nuisance trips caused by momentary voltage fluctuations, ensuring the voltage condition persists for the set duration before the relay changes state.
5.2 LED Indicators
- Green LED (Power Indicator): Illuminates when power is supplied to the device, indicating it is operational.
- Red LED (Output Relay Indication): Illuminates when the internal output relay is activated (i.e., when the monitored voltage condition triggers the relay).
5.3 Working Mode
The GRV8-01 can be configured for various working modes (e.g., over-voltage, under-voltage, or a combination) depending on the specific model and knob settings. Consult the markings on your device for detailed mode selection.
6. Specifications
| Parameter | Value |
|---|---|
| Function | Voltage monitoring |
| Power Terminal | A1(+)-(-) |
| Rated Power Supply Voltage (Optional) | AC220V, DC12V, AC/DC24V-48V, AC/DC110V-240V |
| Rated Power Frequency | 45Hz-65Hz |
| Rated Insulation Voltage | 460V |
| Hysteresis Value | 5%-20% |
| Power Indicator | Green LED |
| Output Relay Indication | Red LED |
| Action Delay Time | 0.1s-10s |
| Voltage Measurement Error | ≤1% |
| Power-on Delay Time | 0.5s |
| Knob Setting Accuracy | 1% |
| Reset Time | 1s |
| Temperature Fluctuation Error | 0.05%/°C (at 20°C) |
| Output | 1 * SPDT 10A/AC1 250VAC / 24VDC |
| Minimum Switching Power | 500mW |
| Mechanical Life | 1 x 107 operations |
| Electrical Life (resistive load) | 1 x 106 operations |
| Working Environment Temperature | -20°C to +55°C |
| Storage Temperature | -35°C to +75°C |
| Installation Method | 35mm DIN rail |
| Protection Level | IP20 |
| Installation Altitude | ≤2000m |
| Pollution Degree | 2 |
| Wiring Ability | 1 x 2.5mm² or 2 x 1.5mm² |
| Dimensions | 90mm x 18mm x 64mm (Approx.) |
| Standard | GB14048.5 IEC/EN 60225-1 |
| Item Weight | 2.5 ounces |
| Package Dimensions | 3.94 x 3.15 x 1.18 inches |
7. Maintenance
The Garosa GRV8-01 relay is designed for reliable operation with minimal maintenance. However, periodic checks can help ensure its longevity and proper function:
- Cleaning: Keep the device clean and free from dust and debris. Use a dry, soft cloth for cleaning. Do not use liquid cleaners.
- Connection Checks: Periodically inspect all wiring connections to ensure they remain tight and free from corrosion. Loose connections can lead to overheating or intermittent operation.
- Visual Inspection: Check for any signs of physical damage, discoloration, or overheating on the device casing or terminals. If any damage is observed, disconnect power and replace the unit.
- Environmental Conditions: Ensure the operating environment remains within the specified temperature and humidity ranges.
8. Troubleshooting
If the GRV8-01 relay is not functioning as expected, refer to the following troubleshooting guide:
- No Power (Green LED Off):
- Check the power supply connections to terminals A1 and A2.
- Verify that the input voltage is present and within the rated power supply voltage range for your specific model.
- Ensure the correct model of GRV8-01 (e.g., AC220V, DC12V) is being used for the applied power supply.
- Relay Not Activating (Red LED Off when expected):
- Verify the 'U' knob settings for over-voltage or under-voltage thresholds. Ensure they are set correctly for the desired monitoring range.
- Check the 'H' knob (Hysteresis) setting. A high hysteresis value might prevent the relay from activating if the voltage has not moved sufficiently beyond the threshold.
- Examine the 'Tt' knob (Action Delay Time). The relay will only activate after the set delay time has elapsed. Wait for the full delay period.
- Confirm that the monitored voltage is actually outside the acceptable range (i.e., an over-voltage or under-voltage condition is present).
- Inspect the wiring to the controlled load (terminals 11, 12, 14) for any disconnections or faults.
- Relay Activating Unexpectedly (Red LED On when not expected):
- Review the 'U' knob settings. The thresholds might be set too close to the normal operating voltage.
- Check for unstable input voltage that might be momentarily crossing the set thresholds.
- Ensure the 'H' knob (Hysteresis) is set appropriately to prevent chattering due to minor fluctuations.
- Inaccurate Voltage Readings:
- Ensure proper wiring and secure connections to the monitoring terminals.
- Verify the stability and quality of the power supply being monitored.
If these steps do not resolve the issue, contact customer support for further assistance.
9. Warranty and Support
Specific warranty information for the Garosa GRV8-01 Single-Phase Voltage Monitoring Relay is not provided in this manual. For details regarding warranty coverage, terms, and conditions, please refer to the product packaging or contact Garosa customer support directly.
For technical assistance, troubleshooting beyond this guide, or inquiries about replacement parts, please reach out to Garosa customer service through their official website or the retailer from whom the product was purchased.