Table of Contents

1. Scope and Purpose
    1.1 Scope
    1.2 Exceptions
2. Referenced Standards
    2.1 American National Standards
    2.2 Other Standards
3. Transformer Requirements
4. Enclosures
    4.1 Definition
    4.2 Categories
5. Enclosures - Basic Requirements
    5.1 Construction
    5.2 Construction Tests
    5.3 Enclosure Security
6. Outdoor Enclosures - Requirements
    6.1 Construction
    6.2 Enclosure Types and Design Tests
7. Outdoor Enclosures - Design Tests
    7.1 Spray Test
    7.2 Dust Tests
    7.3 External-Icing (Sleet) Test
    7.4 Hosedown Test
    7.5 Corrosion-Resistance Test
8. Enclosures - Marking
9. Conformance Tests
    9.1 Definition
    9.2 Requirements
10. Certification Guidelines
    10.1 Sampling
    10.2 Treatment of Test Failures
    10.3 Audit Procedure
    10.4 Design or Material Modifications
Annex A (informative) Test of Minor Variations of
        Component Materials in Insulation Systems
Annex B (informative) Test of Substitute Varnishes in
        Insulation Systems

Abstract

Describes electrical, mechanical, and safety requirements & conformance tests for distribution, power and autotransformers, either single-phase or poly-phase, with ventilated, non-ventilated or sealed enclosures. Remotely or integrally associated with primary or secondary switchgear or substations, 601 volts through 34 500 volts sizes 1 kVA through 2 500 kVA. For installation as in ANSI/NFPA 70-1987. Manufacturers should demonstrate performance requirements are met by tests on representative model. Exceptions. Regulators: (1) Step-voltage and induction voltage, (2) Current transformers: (3) Arc furnace (4) Rectifier (5) Speciality (6) Mine (7) Instrument (8) Motor starting reactors and transformers in non-conventional varnish impregnated systems. Excludes electrical utilities.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	Institute of Electrical & Electronics Engineers
Pages
ISBN