Typical Transformer Faults and Gas Detector Relay Protection

Abstract

This paper describes a number of typical faults which have been experienced in large transformers oil the Saguenay system. Cases are noted where gas detector relay protection would have obvious advantages. Some conclusions are noted regarding the value of this type of protection, based on faults selected from operating experience with 124 transformers over a period of about 26,200,000 kilovolt-ampere-years. Illustrations of incipient faults which have been detected by gas relays are included.