1、 Performance characteristics:

1. High precision measurement of three-phase AC voltage

2. Provide digital tube or LCD display, local data query

3. Programmable voltage ratio setting (LYU-DE301 cannot set ratio)

4. Supports RS-485 communication and Modbus RTU protocol

5. Support switch input, switch output, analog transmission output

6. Wide range AC/DC universal power supply: AC/DC 80V～270V

7. Multiple appearance options to meet the requirements of different cabinet electrical circuits

2、 Technical indicators:

1. Measurement accuracy: Voltage: Level 0.5

2. Signal input: Wiring method: three-phase four wire, three-phase three wire Rated voltage: AC 57.7V、AC 100V、AC 220V、AC 380V

Overload: 1.2 times (continuous), 2 times/1 second (instantaneous)

Power consumption:< 1VA/phase impedance:> 300k Ω frequency: 45-65Hz

3. Auxiliary power supply:

Scope of work: AC/DC 80V~270V Power consumption: ＜ 4VA

4. Functional modules:

Communication interface: 1-channel RS-485 communication, Modbus RTU protocol baud rate: 2400-19200bps, default 9600bps

Switch input: supports 4-channel dry node input

Switching output: Supports 3 relay outputs, with a capacity of AC 250V/5A, DC 30V/5A

Transmission output: supports 3-channel analog output 0/4-20mA or 0-5/10V

5. Environment:

Working temperature: -10 ℃~+55 ℃ Environmental temperature:- 25℃～+70℃

Relative humidity: ≤ 93%, non corrosive gas location altitude: ≤ 2500m

6. Safety:

Insulation resistance:> 100M Ω AC withstand voltage: AC 2kV

7. Electromagnetic compatibility performance:

Electrostatic discharge: Level 4 rapid transient pulse train: Level 4 surge (impact): Level 4

8. External dimensions:

Frame size (mm) 83 × 83; 96×96； 76×76； 48×48

Hole size (mm) 76 × 76; 91×91； 67×67； 45×45