METHOD TO MONITOR INSULATION RESOURCE Russian patent published in 2011 - IPC H02H9/04 

FIELD: electricity.

SUBSTANCE: method to monitor insulation resource includes treatment of equipment with the specified treatment frequency, which exceeds the industrial frequency at least by a factor of ten, measurement of instantaneous voltage values on electric equipment, comparison of measured instantaneous values modules with a rated value of the amplitude voltage at the electric equipment, detection of overvoltage, detection of value, which is in inverse relation with the detected permissible duration of exposure to each of the detected overvoltages, and its addition to the current value of the spent insulation resource. At the same time the specified value is periodically subtracted from the current value of the spent insulation resource, if overvoltages are not registered for the specified period of time, which makes it possible to take into account recovery processes that occur in the insulation in case overvoltage is not available for a long period of time.

EFFECT: increased validity of the spent insulation resource monitoring and provision of possibility of a more complete usage of the available electric equipment resource without reduction of operational reliability.

2 cl, 2 dwg