DTSD342-7 Eectric Power Distribution Monitor

General introduction:
DTSD342-7 electric power distribution monitor integrates measurement and recording, electric energy metering, teleindication and telecontrol, large screen LCD or LED display and network communication, which can measure voltage, current, power, power factor, frequency and other parameters of the grid. In addition, the monitor possesses the function of 2~50 times harmonic analysis, calculation of a number of electric energy quality parameters as well as measurement of active and reactive electric energy. The monitor is equipped with RS-485 communication interface supporting MODBUS-RTU and DL/T645 dual communication protocol. With switch input and output function, the monitor can realize analog transmission output as well.

The monitor can be widely applied to substation automation, industrial control and automation system, energy management system, residential power monitoring, etc.

It conforms to the following standards:
1. GB/T17215.301-2007 special requirements of multifunctional electric energy meter.
2. GB/T17215.322-2008 static active electric energy meter (class 0.2S and class 0.5S) GB/T17215.323-2008 static reactive electric energy meter (Class 2 and class 3).
3. DL/T 614-2007 multifunctional electric energy meter.
4. DL/T 645-2007 communication protocol of multifunctional electric energy meter.
5. Modbus-RTU.

Technical specifications
  • Three-phase four-wire(without PT) connection diagram
  • Three-phase four-wire(with PT) connection diagram
  • Three-phase three-wire connection diagram
Items Technical index
Wiring form three-phase three-wire, three-phase four-wire, single phase
Measurement Voltage Reference voltage Un:AC380V, AC220V, AC100V, AC57.7V
Measurement range:10V~700V
Power consumption:< 0.05VA(single phase)
Accuracy: RMS 0.2 %
Resolution: 0.01V
Current Rated current In:0.3A, 1A, 1.5A, 5A
Measurement range:0.001In~10A
Power consumption:< 0.05VA(single line rated current)
Accuracy: RMS 0.2 %
Resolution: 0.001A
(active / reactive/ apparent)
Accuracy: 0.5%
Resolution: 0.001kW/kVar/kVA
Grid frequency Measurement range:45Hz~65Hz
Accuracy: 0.2%
Resolution: 0.01Hz
harmonic Times: 2~50 
Accuracy: class A
Resolution: 0.01 %
Metering Active electric energy Metering accuracy class: 0.5S
Resolution: 0.01kWh
Reactive electric energy Metering accuracy class: class 2
Resolution: 0.01kvarh
digital signal electric energy pulse output active electric energy pulse output
optocoupler isolation, 4000VRMS
Switch output
1 channel electromagnetic relay output
normally open
Contact rating: AC 250V /3A; DC 30V /3A
Switch input
2 channel dry contact input
optocoupler isolation, 4000VRMS
analog signal Transmission (analog) output
4 channel transmission output
current output type (4~20Ma or 0~20Ma or 0~24mA)
voltage output type (0~5Vor 0~10V)
accuracy: 0.5%
Communication RS-485 communication port
Interface type: two-line half duplex
communication rate: 600bps~38400bps
Protocol: Modbus-RTU and DL/T-645
Environment Working temperature -25℃~+60℃
Limit working temperature -35℃~+70℃
Relative humidity ≤95%(RH)
Others Power supply AC or DC power supply
maximum input range: 40V~420V
Power consumption: ≤1W, 2VA
size Outline size(mm): 72×72×85 
Hole size(mm): 67×67
Weight About 300g

Main features
DTSD342-9 series products contain a total of 13 models. For specific information, please refer to the following product model and function check table.
1. The monitor adopts high-precision sampling and measuring unit together with high-speed MCU data processing unit, which can realize high precision, wide range and accurate measurement as well as fast data analysis.
2. Wide viewing angle LCD display is used to show richer contents.
3. LCD display is equipped with white backlight to meet the requirement of consulting data in dark environment.
4. nonvolatile memory is adopted to store all kinds of data, which can save data for a long time without losing data due to power failure.
5. Support RS-485 communication port and industrial standard communication protocol, convenient and flexible for network construction.
6. Different communication modules are available to satisfy different interface requirements of various users.

Main funcitons
1. Real-time measurement quantity: voltage, current, power, power factor, frequency, voltage and current unbalance rate, preserve voltage and current, power extremum.
2. Measurement of positive and negative active electric energy, four-quadrant reactive electric energy.
3. 2 channel switch input, 1 channel electromagnetic relay output.
4. 2 channel electric energy(active and reactive) pulse output.
5. Voltage and current range: 0.0000~9999.9999.
6. Rich programmable alarm output.
7. Use RS-485 communication interface which supports MODBUS-RTU and DL/T645 dual communication protocol.
8. Display tips of voltage phase-failure, reverse order, communication status, etc.
Complete sealing design, dust control and fog protection.

WILLFAR as a faithful electric power distribution monitor manufacturer, mainly manufacture meter data management instrument, like data logger, data concentrator, data collector, and power monitor, for data logging, power monitoring, data management applications. To serve daily life much better, WILLFAR company also provides custom meter data management and energy efficiency management solutions in specific needs.

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