CURRENTS IN THE HIGH-VOLTAGE OIL-FILLED TRANSFORMERS, AUTO-TRANSFORMERS OR ELECTRICAL REACTORS WINDINGS MEASURING DEVICE Russian patent published in 2019 - IPC H01F27/42 

FIELD: measuring equipment; electrical equipment.

SUBSTANCE: invention relates to the currents in the high-voltage oil-filled transformers, autotransformers or electrical reactors windings measuring device. Device contains at least two current sensors, one of which is a built into the tank high-voltage current transformer with the annular magnetic circuit, with the primary winding in the form of the high-voltage transformer winding branch and with the secondary winding wound around the annular magnetic circuit cross section. On one of the secondary winding branches a second current sensor is installed, and the secondary winding outputs are connected with the signal transmission output into one external system. Second current sensor is made in the form of a low-voltage current transducer, is installed on the built into the tank high-voltage current transformer located outside the tank secondary winding outlet section. Through the additional signal processing unit the low-voltage current converter outlet is connected to the signal transmission output into another external system. Low-voltage current transducer is based on the Hall effect or is made in the form of a low-voltage current transformer with a magnetic core from magnetic material with a linear magnetic characteristic.

EFFECT: transformer equipment windings current instantaneous values precision measurement, the measured signals simultaneous and synchronous transmission in analog and / or digital form into at least two external systems.

7 cl, 3 dwg