UHF Drain Valve Sensor

The sensor is mounted externally at the transformer's oil drain valve, requiring no internal modification or disassembly. This allows for safe and convenient retrofitting on in-service transformers without draining oil or opening the tank.

 It detects high-frequency electromagnetic signals in the UHF range (typically 300 MHz to 2.0 GHz), which are characteristic of partial discharge events. This wide bandwidth improves sensitivity and helps distinguish PD from external noise. 

 The sensor is designed with robust sealing to maintain the transformer's oil integrity and pressure boundary. It uses specialized gaskets and flanges to ensure safe operation even under high oil pressure conditions.

 Optimized antenna design and low-noise performance enable the sensor to detect very low-level PD signals, even from deep within the transformer tank. This enhances the ability to detect early-stage insulation defects.

 The sensor is designed to operate in high-voltage environments with strong electromagnetic interference (EMI). Shielded cabling and grounded housings reduce the risk of false PD readings due to external noise sources. 

 It can be easily integrated into permanent PD monitoring systems. The sensor provides a standard RF output (N-type connector) for continuous or periodic diagnostics.