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Novel MOS based sensor system for detection of dissolved hydrogen in transformer oils

 
: Dura, H.-G.; Mokwa, W.; Ritter, K.; Kean, J.J.

Weetall, H.H. ; National Institute of Standards and Technology -NIST-:
6th International Meeting on Chemical Sensors 1996. Proceedings
Amsterdam: Elsevier, 1996 (Sensors and actuators. B Chemical)
International Meeting on Chemical Sensors (IMCS) <6, 1996, Gaithersburg/Md.>
English
Conference Paper
Fraunhofer IMS ()
monitoring; MOS-FET; transformator oil; Transformatorschutz; Wasserstoff

Abstract
Electrical and thermal over loading of oil filed transformers results in the generation of disolved combustible gase in the oil. This release of H2, CO and hydrocarbons from the oil is an early indication of a fault. In this work, we present a system based on a MOS sensor element for selective online hydrogen detection in transformer oil. The sensor element is based on a standard MOS capacitor with a catalytic metal electrode.

: http://publica.fraunhofer.de/documents/PX-26585.html