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IEEE C57.94-1982

Historical Revision

IEEE Recommended Practice for Installation, Application, Operation, and Maintenance of Dry-Type Distribution and Power Transformers

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New IEEE Standard - Superseded. The application, installation, operation, and maintenance of single- and polyphase dry-type general purpose, distribution, power, and autotransformers are covered. The following types are included: ventilated, indoor and outdoor, self- or forced-air cooled; nonventilated, indoor and outdoor, self- or forced-air cooled; and sealed, indoor and outdoor, self-cooled. Instrument transformers, step voltage and induction-voltage regulators, arc furnace transformers, rectifier transformers, and specialty transformers are not covered.
1.1 Transformers Covered This recommended practice covers general recommendations for the application, installation, operation and maintenance of single and polyphase dry-type general purpose, distribution, power, and auto-transformers of the following types: 1) Ventilated, indoor and outdoor, self-cooled cooled or forced air cooled 2) Nonventilated, indoor and outdoor, self-cooled or forced air cooled 3) Sealed, indoor and outdoor, self-cooled 1.2 Transformers Not Covered This recommended practice does not apply to the following: 1) Instrument transformers 2) Step voltage and induction voltage regulators 3) Arc furnace transformers 4) Rectifier transformers 5) Specialty transformers NOTE -- Both ventilated and nonventilated transformers may be furnished with windings utilizing materials such as solid insulating material which allow or require different practices from those required in this recommended practice. In such equipment the recommendations in this recommended practice may be modified by specific manufacturer's recommendations.
This recommended practice is intended for general use in the application, installation, operation, and maintenance of dry-type transformers manufactured in accordance with ANSI/IEEE C57.12.01-1979 [10]1, ANSI C57.12.50-1980 [2], ANSI C57.12.51-1981 [3], ANSI C57.12.52-1981 [4] and ANSI/NEMA ST 20-1972 [13]. Familiarity with other American National Standards applying to dry-type transformers and to their protection is assumed and the provisions of those standards are indicated herein only for clarity.

SDO IEEE: Institute of Electrical and Electronics Engineers
Document Number C57.94
Publication Date June 7, 1982
Language en - English
Page Count 21
Revision Level
Supercedes
Committee Transformers
Publish Date Document Id Type View
Feb. 26, 2016 C57.94-2015 Revision
June 7, 1982 C57.94-1982 Revision