HYDROCAL BPD is a modular online monitoring system for high voltage bushings as well as partial discharge of bushings and the active part of power transformers. Bushing monitoring supports both the measurement of voltage and phase angle on the test tap to derive tanδ/PF and bushing capacitance as well as electrical partial discharge measurement acc. IEC 60270. For the partial discharge analysis within the active part of high voltage power transformers UHF (ultra-high frequency) measurement is supported.   

As per CIGR… Working Group A2.37 bushings resp. the lead exit represents the 2nd largest group of transformer failure locations (approx. 25%) after the windings (43%) and before the tap changers (23%). Therefore, bushing monitoring can help to reduce those failures. HYDROCAL BPD combined with online DGA performed by the HYDROCAL product family provides the ideal overall transformer monitoring solution.

The measurement of voltage and phase angle on the test tap of high voltage bushings allows to compare tanδ/PF with factory test results for analysing deterioration of the bushings.

Key Advantages

• Monitoring of capacitance, tanj/PF of up to six high voltage bushings (1 up to 6 bushings)
• Advanced software (on the unit and via PC) with intuitive operation by 7= color TFT capacitive touchscreen, WLAN and Webserver operation from any smart phone, tablet, or notebook PC
• Communication interfaces Wi-Fi, USB or ETHERNET 10/100 Mbit/s
• SD memory of test results, history, and diagnostic data of power transformers
• Maintenance free system
• Optional 4G modem with external adhesive antenna
• Optional DNP3 protocol for SCADA connection
• Optional IEC 61850 protocol for SCADA connection