scope:

This standard gives guidance on writing the technical specification for the procurement of static a.c. uninterruptible power supplies (UPSs) for installation in electric power generation plants. The guide covers UPS's consisting of rectifiers, batteries, inverters, transfer switches and bypass switches. This euipment usually forms part of iether a centralised or unit UPS system for duties such as computer, control and instrumentation, etc. supplies. The equipment covered by this guide is related to its function rather than its design type. Therefore the battery and charger equipments are stated in performance terms rather than being specified by a detailed description of the equipment to be supplied.