1. Introduction
The CNC YCV8-06 is a sophisticated 3-phase voltage monitoring relay designed to protect electrical equipment and personnel from various power supply anomalies. It continuously monitors for phase failure, incorrect phase sequence, overvoltage, undervoltage, and voltage asymmetry. This device is suitable for controlling moving equipment, agricultural machinery, refrigerated trucks, and for normal/emergency power supply switching applications.
Key features include:
- True RMS measurement of its own supply voltage.
- 8-level rated operating voltage selection via knob.
- Wide measuring frequency range: 45Hz-65Hz.
- High voltage measurement accuracy: <1%.
- Fixed 0.5s delay status at power-up.
- Compact 1-MODULE DIN rail mounting.
2. Specifications
The YCV8-06 series offers two main models, M460 and M265, catering to different voltage requirements:
- YCV8-06 M460: 10A, 1SPDT, 3-Phase 3-Wire. Voltage Range: 220V-230V-240V-380V-400V-415V-440V-460VAC (Phase-to-Phase).
- YCV8-06 M265: 10A, 1SPDT, 3-Phase 4-Wire. Voltage Range: 127V-132V-138V-220V-230V-240V-254V-265VAC (Phase-to-Neutral).
Technical Parameters
| Parameter | M460 | M265 |
|---|---|---|
| Function | Monitoring 3-phase voltage | |
| Monitoring terminals | L1-L2-L3 | L1-L2-L3-N |
| Supply terminals | L1-L2 | L1-N |
| Voltage range | 220-230-240-380-400-415-440-460(P-P) | 127-132-138-220-230-240-254-265(P-N) |
| Rated supply frequency | 45Hz-65Hz | |
| Measuring range | 176V-552V | 101V-318V |
| Threshold adjustment voltage | 2%-20% of Un selected | |
| Adjustment of asymmetry threshold | 5%-15% | |
| Hysteresis | 2% | |
| Supply indication | green LED | |
| Time delay | Adjustable 0.1s-10s, 10% | |
| Measurement error | <1% | |
| Run up delay at power up | 0.5s time delay | |
| Knob setting accuracy | 10% of scale value | |
| Reset time | 1000ms | |
| Temperature coefficient | 0.05%/°C (0.05%°F, at =68°F) | |
| Output | 1SPDT | |
| Current rating | 10A/AC1 | |
| Switching voltage | 250VAC/24VDC | |
| Min. breaking capacity DC | 500mW | |
| Output indication | red LED | |
| Mechanical life | 1x107 | |
| Electrical life (AC1) | 1x105 | |
| Operating temperature | -20°C to +55°C (-4°F to 131°F) | |
| Storage temperature | -35°C to +75°C (-22°F to 158°F) | |
| 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 | solid wiremax 1X2.5 or 2X1.5 / with sleeve max 1X2.5 (AWG 12) | |
| Dimensions | 90x18x64mm | |
| Weight | 64g | |
| Standards | EN 60255-1, IEC60947-5-1 | |
Note: The function is available.
Image: Detailed technical specifications for the YCV8-06 voltage relay, including function, voltage ranges, thresholds, and environmental conditions.
3. Setup and Installation
3.1 Mounting
The YCV8-06 relay is designed for DIN rail mounting (EN/IEC 60715). Ensure the mounting location is free from excessive vibration, moisture, and extreme temperatures outside the specified operating range.
Image: Diagram showing the overall dimensions (90x18x64mm) and mounting details for the YCV8-06 relay.
3.2 Wiring
Refer to the wiring diagram below for proper connection. Ensure all connections are secure and comply with local electrical codes. The maximum cable size for terminals is solid wiremax 1X2.5 or 2X1.5 / with sleeve max 1X2.5 (AWG 12).
Image: Comprehensive diagram illustrating the wiring connections, front panel layout with adjustment knobs and LEDs, and functional diagrams for phase failure, over/undervoltage, and asymmetry detection.
- Power Supply/Monitoring Inputs:
- M460 (3-Phase 3-Wire): Connect L1, L2, L3 to the corresponding terminals.
- M265 (3-Phase 4-Wire): Connect L1, L2, L3, and Neutral (N) to the corresponding terminals.
- Output Contacts: The relay features 1SPDT (Single Pole Double Throw) output. Connect your control circuit (e.g., contactor coil KM) to terminals 11, 12, and 14 as required. Terminal 11 is common, 12 is normally closed (NC), and 14 is normally open (NO).
3.3 Initial Settings
The front panel features several adjustment knobs:
- Un (Voltage Selection): Set the rated operating voltage according to your system (e.g., 220V, 380V, 460V for M460; 127V, 220V, 265V for M265).
- U> (Overvoltage Threshold): Adjust the percentage deviation above the selected 'Un' at which the relay should trip (2%-20%).
- U< (Undervoltage Threshold): Adjust the percentage deviation below the selected 'Un' at which the relay should trip (2%-20%).
- Asy (Asymmetry Threshold): Set the percentage of voltage imbalance that will trigger the relay (5%-15%).
- t (Time Delay): Adjust the delay time before the relay trips after a fault is detected (0.1s-10s).
4. Operating Instructions
4.1 Indicators
- Green LED (Un): Illuminates when the power supply is present and within the acceptable range.
- Red LED (R): Illuminates when the output relay is active (tripped due to a fault condition).
4.2 Functionality
The YCV8-06 monitors the following conditions based on your settings:
- Phase Failure: Detects the loss of one or more phases.
- Phase Sequence: Ensures the correct phase rotation (L1-L2-L3).
- Overvoltage: Trips if the voltage exceeds the 'U>' threshold.
- Undervoltage: Trips if the voltage drops below the 'U<' threshold.
- Asymmetry: Trips if the voltage imbalance between phases exceeds the 'Asy' threshold.
The relay will activate its output (Red LED 'R' on) when a fault condition is detected and the set time delay 't' has elapsed. The reset time is 1000ms.
4.3 Function Code Table
The YCV8-06 models may have different function codes with pre-defined settings for specific applications. Refer to the table below for details:
| Function code | Over-voltage | Under-voltage | Asymmetry | Delay time | Phase sequence | Phase failure |
|---|---|---|---|---|---|---|
| 03 | 2%-20% | 2%-20% | 2% | 0.1s-10s | ● | ● |
| 04 | 2%-20% | 2%-20% | 2% | 0.1s-10s | ● | ● |
| 05 | 2%-20% | 2%-20% | 5% | 0.1s-10s | ● | ● |
| 06 | 2%-20% | 2%-20% | 8% | 0.1s-10s | ● | ● |
| 07 | - | - | 8% | 2s | ● | ● |
| 08 | - | -15% | 8% | 2s | ● | ● |
5. Maintenance
The YCV8-06 relay is designed for reliable, long-term operation with minimal maintenance. However, periodic checks are recommended:
- Visual Inspection: Regularly inspect the relay for any signs of physical damage, discoloration, or loose connections.
- Cleaning: Keep the device clean and free from dust and debris. Use a dry, soft cloth for cleaning. Do not use abrasive cleaners or solvents.
- Connection Checks: Ensure all wiring connections remain tight and secure. Loose connections can lead to intermittent operation or damage.
Always disconnect power before performing any maintenance or inspection.
6. Troubleshooting
If the YCV8-06 relay is not functioning as expected, consider the following:
- No Green 'Un' LED:
- Check the main power supply to the L1, L2, L3 (and N for M265) terminals.
- Verify that the input voltage is within the selected 'Un' range.
- Red 'R' LED is ON (Relay Tripped):
- Phase Failure: Check for a lost phase in the monitored system.
- Incorrect Phase Sequence: Verify the phase rotation (L1-L2-L3). Correct by swapping two phase wires.
- Overvoltage/Undervoltage: Measure the system voltage to see if it exceeds the 'U>' or falls below the 'U<' threshold. Adjust thresholds if necessary.
- Asymmetry: Measure phase voltages to check for imbalance. Adjust the 'Asy' threshold if needed.
- Time Delay: Ensure the fault condition persists beyond the set 't' time delay.
- Relay Not Tripping on Fault:
- Review the 'Un', 'U>', 'U<', 'Asy', and 't' settings to ensure they are appropriate for your application.
- Confirm the wiring is correct and all phases are properly connected to the monitoring terminals.
- Intermittent Operation:
- Check for loose wiring connections.
- Ensure the operating environment is within specified temperature limits.
If issues persist after basic troubleshooting, consult a qualified electrician.
7. User Tips
- Verify Voltage Type: Always confirm whether your system is 3-phase 3-wire (M460) or 3-phase 4-wire (M265) before installation to ensure correct wiring and model selection.
- Careful Calibration: Take time to accurately set the voltage, over/undervoltage, asymmetry, and time delay thresholds. Incorrect settings can lead to nuisance tripping or inadequate protection.
- Professional Installation: For complex electrical systems, it is highly recommended to have the relay installed and configured by a qualified electrician.
8. Warranty and Support
For warranty information and technical support, please refer to the official CNC Electric documentation or contact your point of purchase. Keep your purchase receipt as proof of date of purchase.
