VOLTAGE INDICATOR Russian patent published in 2020 - IPC G01R19/155 

FIELD: measuring equipment.

SUBSTANCE: invention relates to measurement equipment, namely to devices for indication of high-voltage presence in a network. Voltage indicator comprises a resistor, a single-phase full-wave voltage rectifier, a voltage transformer, a capacitor, a diode, optoelectronic switch and indicator lamp. Capacitor is connected to positive and negative outputs of single-phase double-wave voltage rectifier. AC leads of single-phase double-wave voltage rectifier are connected to outputs of controlled network. Plus output of single-phase double-wave voltage rectifier is connected to anode of light-emitting diode of optoelectronic key and first output of its output part key through resistor. Cathode of the LED of the optoelectronic switch is connected to the first lead of the primary winding of the voltage transformer and the cathode of the diode. Diode anode is connected to the second lead of the primary winding of the voltage transformer, the second output of the key of the output part of the optoelectronic key and the negative terminal of the single-phase double-wave voltage rectifier. Outputs of the secondary winding of the voltage transformer are connected to outputs of the indicating lamp.

EFFECT: higher electrical safety due to provision of galvanic isolation between measuring and indicator circuits, simplification of the circuit.

1 cl, 1 dwg