Reclassification of askarel transformers-field applications and results

Abstract

In 1986, the Westinghouse Electric Corporation introduced a PCB reconditioning process which guarantees quick reclassification of askarel-filled transformers to non-PCB status (below 50 p.p.m.) and with only two short power interruptions. The proprietary process used is functionally described, along with the test program used, and field results. In particular, two years of successful non-PCB operation of specific transformers is briefly outlined.<>