A recent generation of dry type insulation technologies has changed the economics for real-time insulation condition monitoring. This article 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, a new approach for capturing and processing high frequency PD pulse signals in power transformers and HV cable circuits and monitoring accuracy “drift” in revenue-metering current transformers. 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 .
Figure 1. Smart RIF® Bushing Schematic
Representation
Figure 2. Smart RIF® Bushing LED Sensor
Download the full article here: Integrating Condition Monitoring into the Product
