Innovative Condition Monitoring Solutions Using Integrated Sensing Enabled by a New Generation of Dry Type Insulation Technologies

Abstract

A recent generation of dry type insulation technologies has changed the economics for real-time insulation condition monitoring. This paper discusses integrated condition monitoring solutions that can be built into the primary condenser cores of transformer bushings, current transformers and cable accessories (terminations and joints). These solutions include monitoring of capacitive current in the primary condenser core to detect changes in the condenser core C1 capacitance and a new approach for capturing and processing high frequency PD pulse signals in power transformers and HV cable circuits. These factory installed sensing solutions provide the customer with low cost real-time condition monitoring options in place of expensive maintenance and field testing programs.