DEVICE FOR CONTROL OF VOLTAGE IN THE ELECTRICAL INSTALLATION Russian patent published in 2021 - IPC G01R19/155 

FIELD: electrical engineering.

SUBSTANCE: invention can be used in the construction and operation of systems with voltage up to 10 kV in the frequency range from 17 to 60 Hz. The device consists of a voltage indicator (1), capacitive coupling electrodes (2), for example, three for each bus of the electrical installation, voltage sensors (3) and 4 connecting cables (for example, three pieces). The voltage indicator (1) is an element of the detection system, equipped with specialized circuitry, which detects the signal supplied by the capacitive coupling electrode (2) and indicates the state of the voltage on the main circuits of the network in electrical installations. The voltage indicator (1) contains three channels, each functionally consisting of a rectifier-storage unit, a comparator and a converter of accumulated electrical energy into a light pulse. The voltage indicator (1) is made in the form of housing with rear connection of conductors. On its front panel there are LED lamps (5) and a connector (6) for connecting a phasing device cable. On the back wall of the voltage indicator (1) there is a connector for connecting high voltage and grounding sensors (7). The coupling electrode (2) is a high-voltage arm of a capacitive voltage divider made in the form of a support insulator with a low-capacitance metal voltage sensor (3) built into it. The communication electrode (2) is connected to the voltage indicator (1) by means of a signal wire, one end of which is connected to the voltage sensor (3), and the other end is connected to the capacitance of the voltage indicator (1), which serves as a low-voltage arm of the above-mentioned capacitive voltage divider.

EFFECT: proposed device for monitoring the presence of voltage in an electrical installation is a technical solution with costs significantly less than the analogs, and becomes attractive, including for low-cost projects.

5 cl, 1 dwg