Three Phase Four Wire Smart Energy Meter
Type: DTSD1311-CT
This meter can accurately measure combined reactive energy, forward and reverse active energy, four-quadrant reactive energy and other electrical data. It precisely records the maximum demand of forward active power and combined reactive power, and measures real-time grid parameters including active power, reactive power, apparent power, voltage, current, power factor and frequency.
description
It supports time-of-use control, and automatically stores energy and demand data on scheduled reading dates. It also features large-capacity recording of load profiles, power quality records, real-time operating status logs and grid event logs.
Equipped with infrared and RS485 communication interfaces plus an expandable auxiliary power supply, this intelligent device is ideal for time-of-use energy metering and high-efficiency power accounting.
The meter adopts large-scale integrated circuits and SMT surface-mount technology, with design and manufacturing meeting advanced international standards. Key components are sourced from world-famous brands to ensure high reliability and long service life. The base and cover are made of PC material filled with (10±2)% glass fiber, which offers heat resistance, flame retardancy, solid mechanical structure, rainproof performance, excellent insulation and tight sealing. The clock battery and the battery for meter reading during power outages are independent of each other; the backup battery for power-off reading is rationally designed for easy replacement and maintenance.
| Item | Sub-item | Parameter |
| Basic parameter | Applicable Standards | GB/T 17215.321-2021, GB/T 17215.323-2022 |
| Application Scope | 3-phase 4-wire / 2-phase 3-wire energy metering | |
| Service Life | 10 years | |
| Operating Voltage | Normal: 0.8Un~1.2Un; Limit: 0.7Un~1.3Un | |
| Rated Frequency | 50Hz±2.5Hz | |
| Starting Current | CT-connected: 0.02Itr/0.04Itr (active), 0.003In (reactive); Direct-connected: 0.04Itr (active), 0.003In (reactive) | |
| Anti-creep Design | No more than 1 pulse output under no-load condition | |
| Auxiliary Power | 100V~240V AC/DC adaptive, priority power supply | |
| Environmental & Mechanical | Operating Temperature | Normal: -25℃~60℃; Limit: -40℃~70℃ |
| Relative Humidity | 25%RH~95%RH | |
| Weight & Dimensions | 3kg; 290×170×85mm | |
| Installation Size | 240(256)×150mm | |
| Protection Level | IP54 | |
| Functions | Accuracy Class | Active: Class 0.5S/1.0; Reactive: Class 2.0 |
| Pulse Constant | 400/800/10000imp/kWh, 10000imp/kvarh | |
| Core Metering | Forward/reverse active, 4-quadrant reactive, combined reactive energy metering | |
| Split-phase Metering | Supports per-phase active energy metering | |
| TOU Metering | Peak/flat/valley energy accumulated separately; total energy calculated without period arithmetic addition | |
| Clock & Power System | Timing Accuracy | ≤0.5s/d (23℃); ≤±1s/d (-25℃~+60℃) |
| Battery Specs | ≥1200mAh; ≥10-year service life | |
| Calendar & Time Sync | Auto leap year recognition; broadcast time sync (1/day, ±5min); password-protected manual sync | |
| Billing | Recording Scope | Forward/reverse active, 4-quadrant reactive, per-tariff maximum demand with timestamp |
| Billing Method | Slide-type calculation; configurable period (5/10/15/30/60min, default 15min) & slide interval (1/2/3/5min, default 1min) | |
| Data Storage | 12 months of settlement cycle maximum demand data | |
| Reset Function | Auto-reset on settlement/period change; manual reset supported; all operations fully recorded | |
| Tariff & Schedule Management | Tariff Support | 4 tariffs (peak/flat/valley/critical peak) |
| Schedule Configuration | 14 annual time zones, 8 daily schedule tables, ≥8 time periods/24h, min 15min interval | |
| Special Tariffs | Holiday/public holiday special tariff settings | |
| Scheme Switching | 2 sets of programmable tariff schemes, timed switching supported | |
| Data Storage & Freezing | Meter Reading Data | 12 cycles of total/period energy & maximum demand data; auto-transferred on meter reading day |
| Power-off Data Retention | >10 years | |
| Freezing Functions | Scheduled, instantaneous, daily, scheme switching, hourly freezing | |
| Event Recording & Alarm | Event Categories | Voltage loss, phase failure, current loss, reverse phase sequence, power flow reverse, power off, overload, cover opening, programming, time setting, reset, etc. |
| Recording Capacity | Total occurrences + last 10 event details (timestamp, data, operator code) per category | |
| Alarm Methods | LCD fault display, relay alarm | |
| Real-time Measurement | Per-phase voltage, current, power factor, active/ reactive/ apparent power, frequency, internal temperature, current demand | |
| Load Profile Recording | Configurable start time & sampling interval (min 1min, default 15min); 6 optional recording channels | |
| RS485 | Configurable rate (1200/2400/4800/9600bps, default 2400bps); optional 2nd channel with Modbus support | |
| IR Communication | Modulated IR, 1200bps | |
| Optional Wireless | Hybrid(PLC+RF), 4G, NB-IoT | |
| Output Functions | Pulse output (80ms±20ms width); programmable multi-function output (clock/period end/period switching signal) | |
| Display Type | 8-bit LCD (configurable decimals); 2 red pulse indicators (active/reactive) | |
| Display Modes | Auto cycle, key cycle, self-test display | |
| Power-off Display | Wakeable by key/non-contact method; auto-shutoff after 1 cycle/30s of inactivity | |
| Operation Buttons | Scroll, MD Reset | |
| Security Protection | Identity authentication, ciphertext transmission, MAC verification | |
| Permission Management | 2 security levels (98/99), configurable permissions & passwords | |
| Programming Control | IR authentication required; auto-lock after 30min; read-only mode when authentication fails | |
| Communication Address | 12-bit configurable address | |
| Installation & O&M | Installation Rules | No live installation/wiring; install in well-ventilated, dry, fire-resistant indoor area; unsealed/long-stored meters must be re-inspected |
| Wiring Rules | Correct wiring per diagram; use copper wires/terminals; tighten screws to avoid overheating | |
| Calibration Notes | Turn off IR light sources during programming; no current during reset/parameter modification; reset demand after period change | |
| Warranty & Environmental Protection | Warranty | 3-month return, 1-year replacement, 3-year repair; 24h free hotline: 4008817000 |
| Recyclable Components | PC housing, fiberglass PCB, metal parts, paper packaging | |
| Special Disposal | Built-in lithium battery |
