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DEM321AC |
| THREE
PHASE FOUR WIRE ELECTRONIC FRONT BOARD
INSTALLED ACTIVE ENERGY METER |
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Application |
Model
DEM321AC three phase four wire electronic
front board installed active energy meter is
a kind of new style three phase four wire
active energy meter, it adopt
micro-electronics technique, and imported
large scale integrate circuit, use advanced
technique of digital and SMT techniques,
etc. The meter completely accord with
relevant technical requirements of class 1
three phase active energy meter stipulated
in international standard IEC 62053-21. It
can accurate and directly measure 50Hz or
60Hz active energy consumption from three
phase four wire AC electricity net, it is
use for setting indoor or out door, and this
meter has seven digits LCD displays shows
the active energy consumption. And there are
far infrared and RS485 communication module
in it. Contact with all kind of AMR system
conveniently. It has following features:
good reliability, small volume, light
weight, specious nice appearance, convenient
installation, etc.
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Functions and
features |
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Front board three fixed installation, up and
down mounting holes center distance is
198-212 mm, users can choose any one by
themselves.
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Type 48b wiring, use CT connect operation,
may select set 27 ratio of CT, after set the
meter will direct reading when read, and
haven¡¯t
multiplied by rate of CT.
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Seven digits display LCD, 5+2 digits display
(99999.91 kWh, only ratio of CT when 5:5 A)
or 7digits, it is choose by ratio of CT
which
is set.
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There are a polarity port of pulse output
passive closed and a nonpolarity port of
pulse output passive distant (the output
rate is 10
kWh/pulse), ). Complying with standard IEC
62053-31 and DIN 43864.
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Standard configuration there are a port of
far infrared data communication and a port
of RS485 data communication. Communication
agreement complying with standard
DL/T645-1997, can also choose without
function of data communication. (Product
Configuration
code is NC).
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Six LED instructions respectively power
supply state, signal of closed energy
impulse and distant energy impulse and data
communication state.
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Automatic detection the direction of the
flow of load current. And instructions by
individual LED.
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Single direction three components measure
three phase four wire active energy
consumption. It is nothing with direction of
the flow of
load current. Complying with standard IEC
62053-21.
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Standard configuration short terminals
cover, may select extension terminals cover,
in order to protect to use safety. (Product
Configuration code is AF). |
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Technical
parameters |
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Model |
Accuracy |
Reference
voltage (V) |
Current
specifications (A) |
Starting
current (A) |
Insulation
performance |
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DEM321AC |
Class 1 |
3 X 127 / 220
3 X 230 / 400 |
CT/ 5A |
0.01 |
AC voltage 4kV for 1 minute,
1.2/50us waveform
impulse voltage 6kV | |
| *If you need
different reference voltage or current
specification, please advisory our sales. |
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Outer and mount
dimension |
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Wiring diagram
(Type 48B) |
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Terminal |
Note |
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1 |
Inlet L1 phase CT |
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3 |
Outgoing L1 phase CT |
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4 |
Inlet L2 phase CT |
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6 |
Outgoing L2 phase CT |
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7 |
Inlet L3 phase CT |
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9 |
Outgoing L3 phase CT |
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2 |
L1 phase line |
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5 |
L2 phase line |
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8 |
L3 phase line |
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10 |
Neutral line |
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14 and 15 |
Port of CT ratio which is set |
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16 and 17 |
Port of RS485 data communication |
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18 and 19 |
Port of pulse output passive closed |
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20 and 21 |
Port of pulse output passive distant |
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