1. excellent performance
2. higher accuracy .
3. to integrate measuring and controlling.

        YD-841 micro-computer automatic switching device for spare power source/stand-by power  integrates measuring with controlling, which can be used for automatic switching for spare power source in the power plant and substation with voltage 110kV and below. It has functions of tele-control, tele-metering, tele-signaling and tele-adjusting.

 Measuring and controlling function

1.automatic switching functions for two kinds of inlet wire/transformer

2. automatic switching functions for two kinds of section switch (bridge)

3.switching function for automatic synchronism check (three synchronic points)

4.automatically selecting automatic switching function based on system running way

5.8 sets of protective setting group.

Main technical Parameter

1.Rated data

DC power supply: 220V or 110V

AC voltage: 57.7V, 100V

AC current: 5A, 1A

Frequency: 50Hz

2.Power consumption

DC circuit: ≤10W

AC voltage circuit: < 0.5VA/phase

AC current circuit: <1VA/phase (In=5A) or <0.5VA/phase(In=1A)

3.Work range

Current:0.05In~20In(In=5A, 10A)

Voltage: 0.4V~180V

Frequency: 45Hz~55Hz

Df/dt: 0.5Hz/s~10Hz/s

Time:0~99.9S

4.Work environment

Normal work temperature: -20°C~+50°C

Extreme work temperature: -40°C~+70°C

Relative humility: ≤95%    25°C

Atmosphere pressure: 80~110Kpa (relative height above sea below 2000m)