1. Introduction
The DewinLVD LSXDB030 is a 3-phase electricity meter designed for precise measurement and comprehensive power protection. This smart meter features an LCD display and is suitable for DIN rail installation, making it versatile for various applications such as solar photovoltaic systems, commercial buildings, and residential setups.
It integrates multiple protection functions to ensure electrical safety and system stability. These include overvoltage, undervoltage, overcurrent, undercurrent (idle), over-frequency, under-frequency, three-phase imbalance, and power protection. The device allows for adjustable power limits to manage output functions effectively.
Figure 1: Overview of the DewinLVD LSXDB030 3-Phase Electricity Meter highlighting its multifunctional power protection capabilities, including power protection, overcurrent protection, undervoltage protection, low frequency protection, super frequency protection, support overvoltage protection, undercurrent (no load) protection, and three-phase imbalance protection.
Its high reliability and multiple protection features make it an ideal solution for power monitoring and management across diverse energy needs.
Figure 2: The DewinLVD LSXDB030 meter is suitable for a wide range of applications, from schools and rental houses to commercial spaces like shopping malls, hotels, offices, and dining rooms.
2. Installation and Wiring
2.1 DIN Rail Mounting
The DewinLVD LSXDB030 is designed for universal 35 mm DIN rail mounting. Ensure the DIN rail is securely installed in a suitable electrical enclosure. Align the meter with the DIN rail and press firmly until it clicks into place.
2.2 Wiring Diagram
Refer to the following diagram for proper wiring connections. Ensure all connections are secure and comply with local electrical codes. It is recommended that installation be performed by a qualified electrician.
Figure 3: Product wiring diagram illustrating the connection points for Neutral (N), Line 1 (L1), Line 2 (L2), and Line 3 (L3) for both input and output to the loads.
- Connect the incoming Neutral (N) and three-phase lines (L1, L2, L3) to the "IN" terminals.
- Connect the outgoing Neutral (N) and three-phase lines (L1, L2, L3) to the "OUT" terminals, leading to the respective loads.
- Ensure correct phase sequence for optimal operation and protection.
3. Operation
3.1 LCD Display
The meter features a colorful LCD display that clearly shows various operational data, including voltage (V), current (A), frequency (Hz), active power (kW), reactive power (kVar), apparent power (kVA), power factor (PF), and accumulated energy (kWh).
Figure 4: The color LCD display provides real-time data on voltage, current, frequency, and accumulated electricity, ensuring clear visibility day and night.
3.2 Protection Functions
The meter continuously monitors the electrical parameters and activates protection mechanisms when values exceed or fall below predefined thresholds. Key protection features include:
- Overvoltage Protection: Disconnects output if voltage exceeds the set upper limit (e.g., 230-300VAC, default 270V).
- Undervoltage Protection: Disconnects output if voltage falls below the set lower limit (e.g., 140-210VAC, default 170V).
- Overcurrent Protection: Protects against excessive current draw.
- Undercurrent (Idle) Protection: Monitors for abnormally low current, indicating potential issues.
- Over/Under-frequency Protection: Safeguards against frequency deviations outside the normal range.
- Three-Phase Imbalance Protection: Detects and protects against significant voltage or current imbalances between phases.
- Power Protection: Allows setting a power limit (e.g., 100 degrees, likely referring to a power threshold) to automatically switch off the output.
The device features a configurable restart delay time (1-999 seconds, default 5 seconds) after a protection event, and can be set for continuous overcurrent protection times (1-20 times).
3.3 Phase Sequence Display
In the event of a phase failure or incorrect phase sequence, an error indicator (L1-L2-L3) will appear on the display. The meter will then disconnect the output power supply to prevent damage and improve circuit reliability and stability.
4. Maintenance
The DewinLVD LSXDB030 is designed for long-term, reliable operation with minimal maintenance. To ensure optimal performance and longevity:
- Keep the device clean and free from dust and moisture. Use a soft, dry cloth for cleaning.
- Periodically inspect wiring connections to ensure they remain tight and free from corrosion.
- Ensure the operating environment stays within the specified temperature range (-5°C to 40°C).
- Do not attempt to open or repair the device yourself. Refer all servicing to qualified personnel.
5. Troubleshooting
If you encounter issues with your DewinLVD LSXDB030 meter, consider the following common troubleshooting steps:
- No Display/Power: Check the main power supply and all wiring connections. Ensure the rated supply voltage (AC 230V) is present.
- Output Disconnected: If the output is disconnected, check the LCD for error indicators (e.g., L1-L2-L3 for phase failure) or protection activation messages (overvoltage, undervoltage, overcurrent, etc.). Address the underlying electrical issue. The meter will typically restart after the set delay time once the fault is cleared.
- Inaccurate Readings: Verify that the wiring is correct according to the diagram. Ensure the meter is operating within its specified measurement range.
- Persistent Issues: If problems persist after basic troubleshooting, contact customer support or a qualified electrician for further assistance.
6. Technical Specifications
The DewinLVD LSXDB030 meter offers a wide range of measurement capabilities and protection thresholds, as summarized below:
Figure 5: Key measurement ranges and protection parameters of the meter.
Figure 6: Detailed technical specifications and physical dimensions of the DewinLVD LSXDB030 meter.
| Parameter | Value |
|---|---|
| Model Number | LSXDB030 |
| Material | ABS |
| Rated Supply Voltage | AC 230 V |
| Operating Voltage Range | AC 230-300 V |
| Rated Frequency | 40-70 Hz |
| Pulse Signal | 400 imp/kWh |
| Measuring Accuracy | 0.5 degrees |
| Nominal Insulation Voltage | 450 V |
| Surge Protection (Standard) | 230-300 VAC (default 270 V) |
| Low Voltage Protection (Standard) | 140-210 VAC (default 170 V) |
| Idle Protection | 1-62 A |
| Three-Phase Imbalance Protection | 10-100 V |
| Restart Time (Delay) | 1-999 seconds (default 5 seconds) |
| Continuous Overcurrent Protection Times | 1-20 times |
| Output Contacts | 3NO |
| Protection Class | IP20 |
| Display Type | Color Display |
| Installation Method | DIN rail 35 mm |
| Operating Temperature | -5°C to 40°C |
| Product Dimensions | 10.8 x 10.5 x 6.4 cm |
| Product Weight | 710 g |
Note: Specifications are subject to change without prior notice for product improvement.
7. Warranty Information
This DewinLVD product is covered by a standard manufacturer's warranty against defects in materials and workmanship. The warranty period typically begins from the date of purchase. Please retain your proof of purchase for warranty claims. The warranty does not cover damage caused by improper installation, misuse, unauthorized modifications, or natural disasters. For specific warranty terms and conditions, please refer to the documentation provided with your purchase or contact customer support.
8. Customer Support
For technical assistance, troubleshooting, or inquiries regarding your DewinLVD LSXDB030 3-Phase Electricity Meter, please contact our customer support team. When contacting support, please have your product model number (LSXDB030) and purchase information readily available.
You may find additional resources, FAQs, and contact details on the official DewinLVD website.