forlong DRT-341D User Manual

DRS-341 series User Manual

1.1 Foreword

1.2 General Technical Data

1.3 Basic errors

1.4 Dimension

1.5 Wiring diagram

1.6 Operating

1.7 Technical support

DRT-341D

Three phase four wires DIN rail energy meter LCD display

(One module)

User manual

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DRS-341 series User Manual

1.1 Foreword

Thank you for purchasing the FORLONG DRT- 341D series DIN rail three phase four wire energy meters.
With the FORLONG product range we have provided a large scale of energy meters on the market suitable
for 110V AC to 400V AC (50 or 60Hz). Besides the normal energy meters we also developed our own
pre-paid meters with chip card, chip card re-loaders and a complete PC management control system. For
more information on other products please contact our sales department at [e-mail]

Although we produce the Forlong DRT- 341Dseries meter according to IEC 62053-21 and our strict quality
inspection, there might be possibilities that our product shows a fault or failure for which we do apologize.
Under normal conditions your product should give you years of benefit and pleasure. In case there is a
problem with the energy meter you should contact your dealer immediately. All energy meters are sealed with
a special seal. Once this seal is broken there is no possibility to claim for warranty. Therefore NEVER open
meter by yourself or break the seal of the energy meter. The warranty time is 6 moths after installation, and
only valid for construction faults.

1.2General Technical Data

1.2.1 Voltage (V)
Voltage AC (Un) 230/400(3~)
Voltage rang 161/279 to 300/500(3~)

1.2.2 Current (A)

Base (Ib) 10
Max (Imax) 100

Starting current (mA) 0.4% of Ib

1.2.3 Power consumption of current ≤2W /10VA per phase

1.2.4 General data

Frequency(Hz) 50(±10%)
Accuracy 1.0

1.2.5Standards IEC 62053-21

1.2.6 Memory back-up EEPROM

1.2.7 Enclosure material

Upper Polycarbonate
Lower Polycarbonate/glass fibre

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DRS-341 series User Manual

1.2.8 Temperature range(℃)

Operating -10℃ to +50℃

Storing -30℃ to +70℃

1.2.9 Humidity

Operating 75%
Storing 95%

1.2.10 Protection

Protection against penetration
Of dust and water IP51

1.2.11 insulating encased meter

Of Protective class II

1.2.12 Voltage withstand

AC voltage withstand 2KV for 1 minute
Impulse voltage withstand 6KV-1.2uS waveform

1.2.13 Current withstand 30Imax for 0.01s

1.2.14 Pulse output rate 400imp/kWh

1.2.15 Data stored More than 20 years when power off

To comply with the protection requirements the meter must be mounted in a class IP 51 enclosure or better
according to IEC 60529.

1.3 Basic errors:

0.05Ib Cosφ = 1 ±1.5%

0.1Ib Cosφ = 0.5L ±1.5%
Cosφ = 0.8C ±1.5%

0.1Ib - Imax Cosφ = 1 ±1.0%

0.2Ib - Imax Cosφ = 0.5L ±1.0%
Cosφ = 0.8C ±1.0%

1.4 Dimension

Height 110 mm
Width 70 mm
Depth 60 mm
Weight 0.5 Kg (net)

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DRS-341 series User Manual

B

C

A

D

A Front panel
B Cover
C Base
D Security hasp

Material

Front panel PC inflammable retarding
Cover ABS inflammable retarding
Base ABS inflammable retarding

1.5 wiring diagram

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DRS-341 series User Manual

1.6 Operating

Consumption indication:

There is a LED which has two colors (green and red) while flashing in the front panel of DRT-341 series.
When consumption happens, the LED will flash and display red. The more quickly LED flash, the more
consumption there is.

Reading the meter:

The DRT- 341D series energy meter is equipped with a 6+2 register. Six integers are marked with black color
and one decimal is marked with red. The DRT- 341D LCD series energy meter is equipped with 6+2 LCD
display which is used as recording consumption and can’t be reset to zero. The reading accuracy is 1/100
kWh.

Record

The DRT- 341D series energy meter can separate records the total power, phase A, phase B, phase C subentry

power. (The total power= phase A power + phase B power + phase C power)

Pulse output

The DRT_341D Series DIN rail energy meter is equipped with a pulse output which is fully separated from the
inside circuit. That generates pulses in proportion to the measured energy for accuracy testing. The pulse
output is a polarity dependant, passive transistor output requiring an external voltage source for correct
operation. For this external voltage source, the voltage (Ui) should is 5-27V DC, and the maximum input
current (Iimax) is 27mA DC. To connect the impulse output, connect 5-27V DC to connector 20 (anode), and
the signal wire (S) to connector 21 (cathode).

LCD display (two type operational)

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DRS-341 series User Manual

Display item

Total power (A+B+C)

Phase A power

Phase B power

Phase C power

Serial number

Software version

TEL:

021-60975591

FAX:

021-60975593

Email:

[e-mail]

www.china-metes.com

1. L1, L2, L3 show phase A, phase B, phase C in lord.

2. L1, L2, L3 show phase A, phase B, phase C are electric.

Display function

Cycle display status, the default is 5 seconds. The display items as following:
The display item can be settled:

SO Output

0.0025 kWh/imp (Default)

0.0025 kWh/imp, 0.01kWh/imp, 0.1kWh/imp, 1kWh/imp, 5kWh/imp, 10kWh/imp (Optional)

1.7 Technical support

Please contact

Shanghai Fengyilong Electronic CO.LTD www.china-meters.com Email:[e-mail]
86-21-62270763/ 62270963