Applications of new technology in power substations

Applications of some of the more modern technologies to instruments designed specifically to operate in utility substation environments are described. Particular emphasis is placed on the use of CMOS logic, processor and memory circuits, high-density flexible magnetic disk media, and high-capacity Winchester technology storage devices. The operating history of a number of units over a five-year period are reported, as well as the steps taken to protect these devices in a hostile environment. In addition, areas requiring specific improvement and adaptation are noted