EN
The QDM31-2 three-phase 7-Pole DIN rail power meter conforms to DIN 43880 industry specifications. It enables two-way measurement of active and reactive energy and integrates RS485 connectivity with compatibility for multiple communication protocols.
Additional optional functions include prepayment control and time-of-use tariff scheduling. This device serves as an optimal option for intelligent building power monitoring, factory sub-metering and long-distance energy administration.
DIN 43880 Compliance Casing: Scaled to standard 7-module width (125×88×78mm) with a current handling capacity scaled up to a heavy 100A maximum (Imax).
Multi-Tariff Vending Clock: Features an on-board clock chip backed by a maintenance-free lithium battery, mapping 4 TOU tariffs with 8 daily interval schedules alongside 12-month frozen billing logs.
CT Ratio Configuration: Supports programmable multi-ratio external Current Transformer (CT) scaling, converting primary-side high currents into direct, real-time values readable on the backlit display.
1. Measure the active energy and reactive energy consumption on each phase or three-phase power grid.
2. Measure the instantaneous values, such as voltage, current, active power, reactive power, apparent power, power factor, and frequency.
3. Can do time-of-use metering in 4 tariffs. Can set 8-12 daily intervals. Can freely set the date in every month to read the meter automatically. Can set a single tariff on weekends.
4. Can freely select the block interval demand (default) and sliding-window demand. The demand interval can be set within 1-99 minutes. Automatic resetting of the maximum demand or manual resetting for option.
5. Has a clock chip inside and a maintenance-free lithium battery inside. The battery capacity can be detected in real time and displayed.
6. Can record the electricity data for 12 months. Keeps the data permanently while the power is cut.
7. Display readable without main power (RWP) (optional).
8. Backlights to increase readability in low light conditions (optional).
9. LCD display with two options: cycle display (default) or key display item by item. Can set the cycle display interval. Can select the data item to display.
10. Real-time clock: clock with calendar, timing, leap year automatic conversion function.
11. LEDs indicate the power supply state, energy impulse signal, load current flow direction, and the data communication state separately.
12. Equipped with RS485 data communication port and (or) IR data communication port for meter setting or reading meter. The meter setting has password protection. The communication protocol complies with standards IEC65056-21, DL/T 645-2007 or MODBUS-RTU, and can also be customized by the user.
13. CT connection three-phase meter, it supports setting the ratio of the external current transformer, and the meter can display the energy value of the primary side for direct viewing.
14. Built-in magnetic holding relay supports load on-off function.
15. Supports multiple remote communication modes, such as Wifi, Bluetooth, LoRa, 2G, 3G,4G.
| Specifications | QDM31-2 7P | |
| Accuracy | Active | 1.0 |
| Vollage | Rated current | 3X57.7/100V,3X220/380V,3X230/240V,3X240/415V |
| Range | 0.8Un-1.2Un | |
| Limit | 0.7Un-1.3Un | |
| Frequency | 50Hz/60Hz | |
| Basic Current(lb) | Range | 3X5A,3X10A |
| Maximum Current(lmax) | Range | 3X40A,3X60A,3X80A,3X100A |
| Starting Current | 0.4%lb | |
| Display | Type | LCD |
| Digit | 6+2 | |
| Power Consumption |
Voltage Circuit | ≤2.0W,10VA |
| Current Girauit | ≤4VA | |
| Communication | Interface | RS485 |
| Temperature Condition | Work Temperature | -25℃～+65℃ |
| Storage Temperature | -35℃～+75℃ | |
| Humidity | ≤85% | |
| IP degree | IP54 | |
| Dimension | 125X88X78mm | |
| Weight | Net weight | 0.6mm |
| Weight | 0.7mm | |
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