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Description / Abstract:
This standard is for sealed dry-type transformers, 501 kVA and
larger, with high-voltage 601 to 34500 volts inclusive and
low-voltage 208Y/120 to 4160 volts inclusive. This standard is
intended to set forth characteristics relating to performance,
limited electrical and mechanical interchangeability, and to assist
in the proper selection of such equipment.
This standard does not apply to other types of transformers,
such as specialty, ventilated dry-type, padmounted dry-type, liquid
immersed, instrument, regulating, furnace, mine, and rectifier
operations.
Purpose
This standard describes certain electrical and mechanical
characteristics of 60-Hz, two-winding, threephase, sealed dry-type
transformers rated 501 kVA and larger, generally used for step down
purposes. This standard will accomplish this by presenting basic
electrical and mechanical requirements and describing other
requirements or alternatives that may be specified for some
applications.