Discharge measurements using a HTS-SQUID based amplifier system.

In the design and development of high voltage insulation systems, partial d ischarge measurements are often used for system characterization and evalua tion. The aim of this work was to investigate the SQUID sensor as an amplif ier in a high voltage environment. An HTS SQUID amplifier has been develope d and tested under laboratory conditions. Different SQUIDs and a number of different input configurations have been investigated. Preliminary data ind icate that the system has a performance similar to a commercial system used as reference. However, calculations and simulations show that the new meth od has potential for further improvement.