Experience and Recent Developments in Central Station Protective Features

The protective features described in this paper are some of those now in use on the system of the Public Service Electric Co. which serves a population of about 2,200,000. The most interesting protective devices and schemes discussed in this paper are as follows: Aluminum cell arresters; arcing ground suppressor; faulty cable localizer; cable testing; high-potential and high-frequency testing; generator bus connection scheme; exciter connection scheme; reactors; relays; multi-recorder; insulation resistance recorder; air washers; resistance bulbs and thermo-couples; dampers on airblast transformers; coherer alarm devices; potential indicating devices.