ALL-ELECTRIC STANDBY PLANT FOR BUILDINGS.

The ever-increasing dependence of commerce and industry on a continuous supply of electricity has led to an upsurge in demand in recent years for standby electricity supplies. Conventional engine-driven generating sets are usually the first choice of the majority of purchasers of standby plant. Recently, however, due to the efforts of the Johannesburg Electricity Department, an all-electric standby plant was installed in a new high-rise building in Johannesburg. This paper describes the several novel features of this installation which, it is believed, is the first of its kind in South Africa.