RESISTANCE METER Russian patent published in 2023 - IPC G01R27/00 

FIELD: electrical measuring equipment.

SUBSTANCE: resistance meter relates to electrical measuring equipment, namely to the field of measurement of electrical resistance of windings to direct current; it can be used for measurement by an ammeter-voltmeter method for resistance of circuits to direct current, including circuits having significant inductance (for example, windings of transformers, engines). The resistance meter contains two current and two potential clamps for connection of measured resistance, measurement of resistance is carried out using TC7117 microcircuit, the meter also contains six resistors, a potentiometer, power supply of the meter is performed from an outer power supply unit.

EFFECT: increase in the accuracy of measurement in a wide range, possibility of adjustment and calibration of zero, when measuring resistance of transition circuit contacts, the main circuit for high-voltage equipment, high-voltage switches, disconnectors, and dischargers, windings of power transformers, windings of measuring transformers.

1 cl, 2 dwg, 1 tbl