METHOD OF DETERMINATION OF CONDITION AND RESOURCE OF ISOLATION Russian patent published in 2009 - IPC G01R31/00 

FIELD: measurement technology.

SUBSTANCE: this invention refers to the measurement technology and can be used for the evaluation of the condition of long operating isolating spaces of electrical equipment. According to the invention, dielectric loss is defined as functions of time (frequencies), isolated space is chosen and preliminary discharged, the operating voltage is applied and in equal time periods the isolation resistance is measured at the isolation space. Under the resistance value received R_meas(t) the polarisation current is determined i_abc(t) and multiplying each measurement result for the time of the moment when it was received when the isolated space resistance measurements were made, the coefficient value of the dielectric loss ε"(t) = i_abc(t)·t is determined, ε" relation to the time is made for the frequency range 10^-2 - 10^-3, it is sequentially compared with four preliminary chosen standard curves satisfying the defined known operational condition and the resource level of the controlled isolated space, and further the proximity level of the analyzed relation to each of the reference curve is evaluated.

EFFECT: validity of the evaluation of the condition and recourse of the isolation can be improved.

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