Sidorenko A. Improvement of methods of identifying defects in the connections 6-10kV cable-engine operating conditions.

Object - connection cable-engine 6-10kV. The purpose - improvement of methods for showing up the insulation defectes of cable-engine connections 6-10kV in operative modes by definition accuracy rising of insulation defectes location and value of complex admittance of insulation under working conditions, including permanent or changing in time unsymmetry of longitudinal phase conductivity of motors. Methods - theoretical (mathematical modelling, electrical circuit theory, pattern recognition theory, on-off device construction theory) and experimental (physical simulation using modern tools of electrical measurements). Novelty consists in grounding the multimeter method for automatic estimation of state of the cable-engine connection insulation, that based on complex conductivity definition according to measuring of mode parameters and differ from known in ability to recognize the defect category - distributed or local, and for local defect to define the location. Results - the functioning algorithm and pre-production model of control device for monitoring the isolation of connection cable-engine was developed, that is able to operate independently or in the automate system for insulation monitoring. Industry is power stations of Ukraine.