EN
The QSM31-2 is a robust three-phase smart meter. It supports prepaid and postpaid billing simultaneously, pairing accurate metering with all-round energy and network monitoring tools. Built-in functions including multi-tariff control, load profile archiving, event recording and tamper sensing allow service providers to streamline operations and secure stable revenue. Thanks to modular communication interfaces and an expandable system framework, the QSM31 flexibly caters to ever-changing AMI, smart grid and energy management standards.
Complying with STS standard: Designed with a robust, integrated tactile keypad built directly into its specialized dustproof housing, facilitating compliant token-based vending operations directly at the mounting site.
It manages sudden load demand shifts and executes automated tariff disconnections based on continuous, real-time localized credit evaluations.
Comprehensive Tamper & Maintenance Security: Specifically optimized for field-durability with an externally accessible, replaceable battery that ensures continuous display functionality and uninterrupted event logging for base/terminal cover open detections during absolute power blackouts.
1. Open protocol: DLMS/COSEM (E mode)
2. Prepayment and post-payment mode switchable for users’ convenience
3. Local and remote firmware upgrades.
4. Plug-and-play communication module, such as GPRS, 3G, 4G, etc.
5. Internal switch relay for load demand control by configuration or remote communication
1. Measuring forward and reverse active energy in tariff.
2. Measuring forward and reverse reactive energy in tariff.
3. Instantaneous value measurement.
4. Up to 4 tariffs
5. Up to 8 divisions per day; weekend configurable
6. Up to 4 seasons, working days, and weekend tariff scheme configurable per season.
7.12 months billing data and other frozen data for inquiry.
8. Block or slide mode configurable for maximum demand.
9. Import and export active MD in tariff with time stamp.
10. Import and export reactive MD in tariff with time stamp.
11. Large digit LCD display, easy to read.
12. Display readable without main power (RWP).
13. Standardized OBIS display
14. Backlights to increase readability in low light conditions.
15. Real-time clock: clock with calendar, timing, and leap year automatic conversion function.
16. Multiple event detections and records with categories of operation, power grid, and tampering.
17. Base cover or terminal cover open detection and record
18. Prepayment mode via a numeric token with extended ways of recharging.
19. Channel quantity customized before leaving the factory; up to 8 channels.
20. Data for load profile record configuration
21. External battery replaceable
22. Load profile up to 12 channels
23. Power and energy sampling calculations should include the fundamental and THD in the network
| Specifications | QSM31-2 | |
| Accuracy | Active | 1.0 |
| Reactive | 2.0 | |
| 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 | OPtical/RS485/M-bus/GPRS/3G/RF/PLC |
| Temperature Condition | Work Temperature | -25℃～+65℃ |
| Storage Temperature | -35℃～+75℃ | |
| Humidity | ≤85% | |
| IP degree | IP54 | |
| Dimension | 264X170X79.5mm | |
| Weight | Net weight | 1.8kg |
| Weight | 2.2kg | |
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