JSY-MK-339 Three phase voltage and current collector


  • Measure three-phase AC voltage, current, power, power factor, frequency, electric energy and other electrical parameters.
  • The special measuring chip is adopted, and the measurement accuracy reaches level 1.0 of the national electric power measurement standard (gb/t17215).
  • RS-485 communication interface with one ESD protection circuit.
  • High isolation voltage, withstand voltage up to AC; 2000V。
  • Built in 4G communication module.
  • The communication protocol adopts standard Modbus RTU, which has good compatibility and is convenient for programming.
  • It can be changed and customized according to customer requirements.

Product Detail

Product Tags


Jsy-mk-339 three-phase voltage and current collector is a three-phase watt hour meter with completely independent intellectual property rights developed by our company using microelectronic technology and special large-scale integrated circuits, using advanced technologies such as digital sampling and processing technology and SMT process. The technical performance of the tester fully meets the relevant technical requirements of class 1 three-phase active watt hour meter in IEC 62053-21 national standard, and can directly and accurately measure the voltage, current, power, power factor, electric quantity, total amount and other electrical parameters in the three-phase AC network with the rated frequency of 50Hz or 60Hz. The detector has a built-in 4G communication module, a RS485 communication interface, a dot matrix LCD display, and MODBUS-RTU communication protocol, which is convenient to connect with various AMR systems. It has the characteristics of good reliability, small size, light weight, beautiful appearance, convenient installation and so on.

Technical Parameter

1. Three phase AC input
1) Voltage range: 100V, 220V, 380V, etc;
2) Current range: 5A, 20a, 50a, 100A, 200A and other options; The model of external opening current transformer is optional;
3) Signal processing: special measurement chip and 24 bit AD sampling;
4) Overload capacity: 1.2 times the range is sustainable; 5 times of instantaneous (<200ms) current and 2 times of voltage range without damage; Input impedance: voltage channel > 1 K Ω /v; Current channel ≤ 100m Ω.

2. Communication interface
1) Interface type: 1-way RS-485 communication interface.
2) Communication protocol: MODBUS-RTU protocol.
3) Data format: software can set "n, 8,1", "E, 8,1", "O, 8,1", "n, 8,2".
4) Communication rate: the baud rate of RS-485 communication interface can be set at 1200, 2400, 4800, 9600bps; The baud rate defaults to 9600bps.
5) Wireless communication system: 4G, CAT1, supporting lte-tdd and lte-fdd

3. Test output data
Voltage, current, power, electric energy and other electrical parameters.

4. Measurement accuracy
Voltage, current and power: ≤ 1.0%; Active energy measurement standard level 1.0

5. Power supply
Wide voltage power supply; 220VAC power supply; Typical power consumption: 50mA.

6. Working environment
1) Working temperature: -20~+70 ℃; Storage temperature: -40~+85 ℃.
2) Relative humidity: 5~95%, no condensation (at 40 ℃).
3) Altitude: 0~3000 meters.
4) Environment: a place without explosion, corrosive gas and conductive dust, and without significant shaking, vibration and impact.

7. Temperature drift: ≤100ppm/℃

8. Installation method: Standard 4P guide rail installation

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