DTZY217 Three Phase Smart Meter with Communication as per DL/T645-2007
General introduction
DTZY217 Three Phase Smart Meter with Communication as per DL/T645-2007 can measure import and export active energy,inductive and capacitive reactive energy, with TOU and step tariff functions, and can be optional with PLC or RF module. It can be controlled to disconnect and reconnect the load remotely.
Main Function
1. Display and indication: It adopts a large screen LCD with abundant graphics and hint text. The displayed contents can be scrolled automatically or by button, and the displayed items can be configured as per the requirements. It is with backlight. Meter can be read during power outage.
2. Measurement: It can measure voltage, current, active power, reactive power, apparent power, power factor, import and export active maximum demand, and four quadrant reactive maximum demand. It is with high accuracy. Class 0.2S, Class 0.5S or Class 1 for kWh are available.
3. TOU:4 tariffs; Built-in 2 sets of time zone tables and 2 sets of daily period tables, which can be configured as per the requirements. The switching time for both 2 sets of time zone tables and 2 sets of daily period tables can be set to achieve the mutual switching. It can be set 14 time intervals and 254 holidays.
4. Data snapshot: It supports freezing which include daily freezing, hourly freezing, occasional freezing, immediate freezing.
5. Event logs: It can separately record latest 10 times events, such as power outage, programming, time correction, meter cover open and terminal cover open, disconnection and re-connection, reset of events, reset of meter, etc.
6. Communication interface: The meter has one infrared interface, one RS485 and one PLC or GPRS module interface. Interfaces are independent. The protocol of meter conforms to DL/T645-2007.
Technical specifications
| Items | contents |
| Standards | IEC62052-11; IEC62053-21; IEC62053-22; IEC62053-23; |
| Accuracy | Active:Class 0.2S or Class 0.5S or Class 1.0; Reactive:Class 2 |
| Protocol | DL/T645-2007 |
| Reference voltage | 3×57.7/100V;3×120/208V;3×220/380V |
| Current | CT connection:1.5(6)A,5(6)A,5(10)A, Direct connection:10(40)A,10(60)A,20(80)A,10(100)A |
| Reference frequency | 50/60Hz |
| Power consumption | <1.5W,6VA(For each phase) |
| Operation voltage range | 0.8Un~1.2Un |
| Limited operation voltage range | 0.7Un~1.3Un |
| Operation temperature range | -25℃~ +60℃ |
| Limited operation temperature range | -40℃~ +70℃ |
| RTC deviation | ≤0.5s/d |
| Life time | 15 years |
| Size | 290mm(L)×170mm(W)×85mm(H) |
| Net weight | About 2.8kg |
Q & A
Q1: What kind of error message code prompts do LCD screen of smart energy meter have?
A1: When malfunction appears in energy meter, it will display error message codes:
(1) Err-01 Control loop error
(2) Err-02 ESAM error
(3) Err-04 Low battery voltage of clock
(4) Err-08 Clock failure
(5) Err-10 Authentication error
(6) Err-16 Change key error
Q2: What kind of timing functions do smart energy meter have? How about the accuracy?
A2: Smart energy meter adopts built-in hardware clock circuit with temperature companion function, which has automation conversion function among calendar, time and leap year; the output frequency of internal clock terminals of energy meter is 1 Hz. Within the temperature range of 25～+60℃, the clock accuracy is ≤±1s/d; Under the reference temperature (23℃), the clock accuracy is ≤±0.5s/d. It adopts green environmental protection lithium battery as standby power supply, and the capacity of battery is more than 1.2Ah. During the life cycle of energy meter, the battery needn’t to be changed, and it can make internal clock work correctly for more than 5 years after power outage.
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