YWBL-WH JVR800-2 3-Phase Voltage Monitoring Relay Instruction Manual
Model: JVR800-2
1. Product Overview
The YWBL-WH JVR800-2 is a sophisticated 3-phase voltage monitoring relay designed to protect electrical systems from various power anomalies. It integrates protection against overvoltage, undervoltage, phase loss, phase sequence errors, and unbalanced 3-phase voltages. This device features an LCD display for easy data reading and offers both manual and automatic reset modes.
2. Key Features
- Comprehensive protection against overvoltage, undervoltage, phase loss, phase sequence, and voltage unbalance.
- Integrated timer and counter functions.
- Clear LCD screen for displaying voltage, current, and operational status.
- Two optional reset modes: manual and automatic.
- Does not require an external power supply for operation.
- Practical functions including power-on delay and output testing.
3. Technical Specifications
| Parameter | Value |
|---|---|
| Model | JVR800-2 |
| Monitoring Circuit | L1, L2, L3 |
| Rated Voltage | 208-480 V AC, 50/60 Hz |
| Protection Functions | Overvoltage, Undervoltage, Voltage Unbalance, Phase Loss, Phase Sequence, Counter |
| Overvoltage Adjustment Range | 200-600 V |
| Undervoltage Adjustment Range | 150-500 V |
| Voltage Hysteresis | 1-20 V |
| Over/Undervoltage Delay Time | 0.1-30 s |
| Voltage Unbalance Ratio | 1-50 % |
| Voltage Unbalance Hysteresis | 1-10 % |
| Voltage Unbalance Delay Time | 0.1-30 s |
| Phase Loss Delay Time | 0.1-30 s |
| Phase Sequence Delay Time | 0.1-30 s |
| Start Delay Time | 0-999 s |
| Automatic Reset Mode | On/Off |
| Automatic Reset Time | 0.1-999 s |
| Timer and Counter Input | AC/DC 80-450 V |
| Indicators | LCD displaying voltage, current, working status |
| Output Contacts | 1 C/O, 1 NC |
| Contact Capacity | 6 A, 250 V AC |
| Dimensions | 80 x 43 x 54 mm |
| Mounting | 35 mm DIN rail |
| Weight | 129 g |
4. Installation and Wiring
4.1 Mounting
The JVR800-2 relay is designed for easy installation on a standard 35 mm DIN rail. Ensure the mounting location is free from excessive vibration, moisture, and extreme temperatures.
Image: The JVR800-2 relay showing its compact dimensions of 80mm (length), 43mm (width), and 54mm (height), suitable for DIN rail mounting.
4.2 Wiring Connections
Connect the 3-phase power supply to the L1, L2, and L3 terminals. The relay does not require a separate auxiliary power supply as it draws power from the monitored circuit. Connect the control circuit to the output contacts (18(14), 15(11), 16(12) for C/O and 25(21), 26(22) for NC) as required by your application.
Image: Front view of the JVR800-2, illustrating the terminal layout for L1, L2, L3, C1, C2, and output contacts, along with the LCD and control buttons.
Image: Rear view of the JVR800-2, highlighting the DIN rail mounting mechanism and product labeling.
4.3 Initial Power-Up
After wiring, apply power to the L1, L2, L3 terminals. The LCD will illuminate, displaying the current voltage and operational status. Observe the display to confirm correct phase sequence and voltage levels.
5. Operating Instructions
5.1 LCD Display
The LCD provides real-time information:
- RUN: Indicates normal operation.
- COUNT: Displays the internal counter value.
- Voltage Reading: Shows the measured line-to-line voltage (e.g., L3-L1).
- PHS.FAILS: Indicates a phase failure or sequence error.
5.2 Button Functions
- RST (Red Button): Used for manual reset of the relay after a fault condition. Also used to clear counter values.
- + (Plus Button): Used to increase parameter values during setting adjustments.
- - (Minus Button): Used to decrease parameter values during setting adjustments.
- MOD (Green Button): Used to enter the setting menu, navigate through parameters, and confirm selections.
5.3 Parameter Settings
To adjust protection parameters (e.g., overvoltage threshold, delay times):
- Press and hold the MOD button to enter the setting menu.
- Use the + and - buttons to navigate between parameters (e.g., overvoltage, undervoltage, delay times).
- Press MOD again to select a parameter for adjustment.
- Use + and - to change the value.
- Press MOD to confirm the new value and move to the next parameter or exit the setting menu.
Refer to the 'Technical Specifications' section for the adjustable ranges of each parameter.
5.4 Automatic Reset Mode
The JVR800-2 supports an automatic reset mode. If enabled, the relay will attempt to reset itself after a fault condition clears and a specified auto-reset delay time has passed. This feature can be enabled or disabled in the settings menu, and the auto-reset time can be configured between 0.1 and 999 seconds.
6. Maintenance
The YWBL-WH JVR800-2 is designed for reliable operation with minimal maintenance. Periodically inspect the device and its connections for any signs of damage, loose wiring, or excessive dust accumulation. Ensure proper ventilation around the unit. Disconnect power before performing any inspection or cleaning.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on | No 3-phase power supply; Incorrect wiring. | Verify power supply to L1, L2, L3 terminals; Check wiring connections. |
| Relay trips frequently | Voltage outside set limits; Incorrect parameter settings; Unstable power supply. | Check actual voltage levels; Adjust over/undervoltage thresholds and delay times; Consult with power utility. |
| PHS.FAILS indicator is on | Phase loss detected; Incorrect phase sequence. | Verify all three phases are present and correctly connected (L1, L2, L3); Check phase sequence. |
| LCD display is blank or erratic | Power issue; Internal fault. | Ensure stable power supply; If problem persists, contact support. |
| Cannot adjust settings | Not in setting mode; Buttons malfunctioning. | Press and hold MOD button to enter setting mode; If buttons are unresponsive, contact support. |
8. Warranty and Support
This product is covered by a manufacturer's warranty against defects in materials and workmanship. Please refer to your purchase documentation for specific warranty terms and duration. Any unauthorized tampering or removal of warranty seals (e.g., "WARRANTY VOID IF REMOVED!") may void the warranty. For technical support or service inquiries, please contact your vendor or the manufacturer directly.
Image: An electrician performing installation or maintenance on an electrical panel, featuring the JVR800-2 relay.