More info
Description / Abstract:
This standard covers certain electrical, dimensional, and
mechanical characteristics and takes into consideration certain
safety features of three-phase, 60 Hz, liquid-filled, self-cooled,
pad-mounted, compartmental-type distribution transformers. These
transformers are rated 10 MVA and smaller, with the high-voltage
limit of 34.5 kV system nominal voltage and below, and with
low-voltage limit of 15 kV system nominal voltage and below. These
transformers are generally used for step-down purposes from an
underground primary cable supply. This standard covers the
connector, bushing, and terminal arrangements for radial or
loop-feed systems. Either certain minimum dimensions or certain
specific dimensions shall be specified. This standard does not
cover the electrical and mechanical requirements of any accessory
devices that may be supplied with the transformer.
Purpose
This standard is intended for use as a basis for determining
performance, interchangeability, and safety of the equipment
covered, and to assist in the proper selection of such
equipment.