AC Service Protection in Unattended ESS Telephone Equipment Buildings

Unattended ESS telephone equipment buildings present different considerations than those presented by the older electromechanical Central Dial Offices. The planning and design of the AC service protection system in these buildings is now directed toward the building environment and ancillary mini-microcomputers as well as the exchange switching equipment. This paper describes the equipments, circuits and economical considerations used when planning the protection system with its associated administrative alarms. Included are sketches for "do-it-yourself" unitized equipments fabricated to provide economical protection with space saving concepts.