Single Phase AMI Energy Meter with Interchangeable Module
General introduction
Single Phase AMI Energy Meter with Interchangeable Module can measure the import and the export active energy,and is with TOU
and step tariff functions, and can be with PLC or RF module for
communication, and can be controlled to disconnect or reconnect the
load remotely.
Main functions
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. Metering and measurements: It can measure the import and the
export active energy and the total active energy. The total active
energy can be configured by the import and the export active energy
as per the requirements. It can measure voltage, current, power,
power factor, neutral current(optional), etc.
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 and achieve the
mutual switching. It can set 14 time intervals and 254 holidays.
4. Data Snapshot: It supports freezing which includes 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,disconnection/re-connection, reset of events, reset of meter,
etc.
6. Communication interface: The meter has one far infrared
communication interface, one RS-485 communication interface and one
PLC/RF (PLC and RF can be changeable.) communication module
interface. Interfaces are independent with each other. The protocol of meter
conforms to DL/T645-2007.
Technical specifications
| Items | contents |
| Techniacl Standards | IEC62052-11; IEC62053-21 |
| Protocol | DL/T 645-2007 |
| Accuracy | Active: Class 1 |
| Reference voltage | 120V/220V/230V/240V |
| Current | CT connection:1.5(6)A. Direct connection:10(40)A,10(60)A,20(80)A,10(100)A |
| Reference frequency | 50 / 60Hz |
| Power consumption | ＜1.5W,6VA |
| Operation voltage range | 0.8Un~1.2Un |
| Limited operation voltage range | 0.7Un~1.3Un |
| Operation temperature | -25℃~ +60℃ |
| Limited operation temperature range | -40℃~ +70℃ |
| RTC deviation | ≤0.5s/d |
| Life time | 15 years |
| Size | 160mm(L)×112mm(W)×71mm(H) |
| Net weight | About 0.6kg |
Q & A
Q: What kind of requirements do smart energy meter have to load
switch?
A: The load switch of smart energy meter can be divided into
internal or external mode. When it adopts the internal load switch,
the maximum current of energy meter should not be more than 60A.
When it adopts the internal load switch, switch operation shall
have Acr suppression measures (hardware or software), and its
export loop shall have safety measures for anti false action and
being easy to field test. Under the condition of above current, the
lifetime of switch shall not be less than 6000 times. Imposing
reference voltage on voltage circuit of energy meter, and under the
condition of passing 1.2Imax to current circuit, carries out switch
on and off test for 10 times; After the test, the energy meter
shall work normally; when imposing 70% to 120% reference voltage on
voltage circuit of energy meter, the load switch shall work
normally.
When it adopts external load switch, energy meter shall output a
set of switch signals, and the capacity of switch node is AC 250V,
2A. During normal operation, the outgoing switch signals shall
maintain load switch closing and allow users to use electricity.
When the control conditions are satisfied, the outgoing switch
signals shall drive external load switch action and interrupt power
supply.
