METHOD OF MEASUREMENT OF INSULATION RESISTANCE IN ELECTRIC NETWORKS Russian patent published in 2016 - IPC G01R27/16 

FIELD: measurement technology.

SUBSTANCE: method of measuring insulation resistance of electrical networks, which consists in the fact that a controlled network connected DC power source of constant values produce the charge capacity of the network to a predetermined voltage, shut off the constant current source of constant values that connect the source of measuring DC voltage setpoint and calculates an estimate of the steady current value i_1set by extrapolation, to produce the measurement of the current i₁, i₂, i₃ at three different points in time t₁, t₂, t₃, and t₃/t₂= t₂/t₁, calculates an estimate of the final value of current i_1set, using the values of current i₁ i₂, i₃. Then connect to the network controlled by a constant current source of constant values of opposite polarity. Produce the charge capacity of the network to a predetermined voltage of opposite polarity. Unplug the DC power source of constant values. Plug-in power measuring DC voltage setpoint of opposite polarity. Then calculate the estimate of the final value of current i_2set by extrapolation, to produce the measurement of the current i₄, i₅, i₆ at three different points in time t₄, t₅, t₆, using the values of current i₄, i₅, i₆, calculates an estimate of the final value of current i_2set and treated with the test.

EFFECT: insulation resistance measurement of electrical networks under operating voltage and de-energized and isolated from the "ground".

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