Table of Contents

1. Overview
   1.1 Scope
   1.2 Purpose
   1.3 Word usage
2. Normative references
3. Definitions
4. Service conditions
   4.1 Usual service conditions
   4.2 Loading at other than rated conditions
   4.3 Unusual service conditions
   4.4 Frequency
5. Rating data
   5.1 Cooling classes of voltage regulators
   5.2 Ratings
   5.3 Supplementary continuous-current ratings
   5.4 Taps
   5.5 Operating voltage limits
   5.6 Voltage supply ratios
   5.7 Insulation levels
   5.8 Losses
   5.9 Short-circuit requirements
   5.10 Tests
6. Construction
   6.1 Bushings
   6.2 Terminal markings
   6.3 Diagram of connections
   6.4 Nameplates
   6.5 Tank construction
   6.6 Components and accessories
7. Other requirements
   7.1 Other supplementary continuous-current ratings
   7.2 Other components and accessories
8. Test code
   8.1 Resistance measurements
   8.2 Polarity test
   8.3 Ratio tests
   8.4 No-load losses and excitation current
   8.5 Load losses and impedance voltage
   8.6 Dielectric tests
   8.7 Temperature-rise tests
   8.8 Short-circuit tests
   8.9 Calculated data
9. Control systems
   9.1 General
   9.2 Control device construction
   9.3 Control system requirements
   9.4 Tests
Annex A (informative) - Unusual temperature and altitude
        conditions
Annex B (informative) - Field dielectric tests
Annex C (informative) - Bibliography

Abstract

Deals with electrical and mechanical requirements of liquid-immersed, single- and three-phase, step-voltage regulators, not exceeding a regulation of 3000 kVA (for three-phase units) or 1000 kVA (for single-phase units).

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	Institute of Electrical & Electronics Engineers
Pages
ISBN
Supersedes	IEEE DRAFT C57.15 : D8 98