IEEE DRAFT C57.135 : D12 AUG 2000

1 OVERVIEW
      1.1 Scope
      1.2 Purpose
2 REFERENCES
3 DEFINITIONS AND TERMINOLOGY
      3.1 Advance Phase Angle
      3.2 Excitation-Regulating Winding
      3.3 Excitation Winding
      3.4 Excited Winding of a Two-Core Phase-Shifting
             Transformer
      3.5 Load (L) Terminal
      3.6 Main Unit of a Two-Core Phase-Shifting
             Transformer
      3.7 Phase-Shifting Transformer (PST)
      3.8 Primary Circuit of a Phase-Shifting Transformer
      3.9 Rated kVA of a Phase-Shifting Transformer
      3.10 Rated Phase Angle of a Phase-Shifting Transformer
      3.11 Rated Voltage of a Phase-Shifting Transformer
      3.12 Regulated Circuit of a Phase-Shifting Transformer
      3.13 Regulating Winding
      3.14 Retard Phase Angle
      3.15 Series Unit of a Two-Core Phase-Shifting
             Transformer
      3.16 Series Winding of a Two-Core Phase-Shifting
             Transformer
      3.17 Single-Core Design
      3.18 Source (S) Terminal
      3.19 Two-Core Design
4 APPLICATION AND THEORY OF PHASE-SHIFTING TRANSFORMERS
      4.1 Introduction
      4.2 Basic Principle of Application - Advanced and
             Retard Phase Angle
      4.3 The Phase-Shifting Transformer Under Load
      4.4 Power Transfer
      4.5 Types of Phase-Shifting transformers
      4.6 Special OLTC Features
      4.7 Arrangement of More Than One PST
      4.8 Design Criteria
5 SERVICE CONDITIONS
      5.1 Usual Service Conditions
      5.2 Loading at Other Than Rated Conditions
      5.3 Unusual Service Conditions
      5.4 Protection
6 RATING DATA
      6.1 Polarity, Angular Displacement and Terminal
             Markings
      6.2 Impedance
      6.3 Nameplates
7 CONSTRUCTION
      7.1 Enclosed Throat Connections
      7.2 Liquid Insulation and Preservation System
8 SHORT CIRCUIT CHARACTERISTICS
      8.1 Short Circuit Requirements
9 CONTROL SYSTEM
      9.1 Control Equipment and Accessories
      9.2 Requirements
      9.3 Test Code for Control Systems
10 TESTING OF PHASE-SHIFTING TRANSFORMERS
      10.1 General
      10.2 Special Tests for Phase-Shifting Transformers
11 TOLERANCES
      11.1 General
      11.2 Tolerances for Ratio of Series and Main Units
      11.3 Tolerance for Phase Angle and Impedance
12 BID DOCUMENT CHECK LIST
      12.1 Non-Technical Information
      12.2 Technical Information
      12.3 Special Requirements or Conditions
      12.4 Additional Information
13 BIBLIOGRAPHY

Covers the application, specification, theory of operation, and factory and field testing of single-phase and three-phase oil- immersed phase-shifting transformers.