FIELD: electricity.
SUBSTANCE: device is based on measurement of leakage currents of two buses separately at positive voltage on according bus and calculation of insulation resistance depending on voltage of circuit and leakage current with the help of microcontroller. Implementation of such measurements is efficient for circuits with controlled voltage as its polarity changes, which is specific for controlled drives.
EFFECT: simple and reliable design, principal possibility to control insulation resistance of DC buses at controlled voltage and during its polarity change, and improved accuracy of insulation resistance measurements and reliability of protection in process of voltage control.
1 dwg
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