VOLTAGE SENSOR OF THREE-PHASE NETWORK Russian patent published in 2011 - IPC H02H7/09 G01R19/30 

FIELD: electricity.

SUBSTANCE: device includes stabilised power supply, microcontroller, three resistor voltage dividers, the first group of inputs to which the first outputs of dividers are connected. In addition, there introduced is the second group of inputs to which the first outputs of other voltage dividers are connected, the second outputs of which are also connected together and connected to "minus" of stabilised power supply, and output of microcontroller is connected by means of galvanic isolation unit and communication line to control and indication unit.

EFFECT: enlarging its functional capabilities by increasing the number of controlled points; thus, possibility of controlling low voltages and transferring the information to the main control and indication unit is provided via two-wire communication line with galvanic isolation of their power supplies.

2 cl, 1 dwg