IEEE C62.21 2004
$44.96
IEEE Guide for the Application of Surge Voltage Protective Equipment on AC Rotating Machinery 1000 Volts and Greater
| Published By | Publication Date | Number of Pages |
| IEEE | 2004 | 50 |
Revision Standard – Active. Project scope: This guide covers the application of surge voltage protective equipment to AC rotating machines rated 1000 volts and greater. The guide does not cover motors applied in solid-state switched adjustable speed drives. Part 1 covers the insulation surge withstand strength of motors and generators with windings having form-wound multi-turn coils and the application of surge protection to form-wound multi-turn coil motors. Part 2 will cover application of surge protection to generators with form-wound multi-turn coils, plus insulation surge withstand strength and surge protection of single-turn coil generators and motors. Project purpose: This guide is intended to aid engineers at all levels of surge protection knowledge in deciding whether particular machines should have surge protection. The guide may be used in estimating the surge withstand capability and switching surge exposure of ac rotating machinery in usual, not extreme exposure, installations. The manufacturer should be contacted for specific insulation surge voltage withstand values for machinery of particular interest or importance. For those machines which should be protected, the purpose is to provide guidance in selecting and applying the protective devices. A simple look-up method using tables and a graph is provided for quick estimation of surge rise times and surge voltage levels, and for general use where accuracies in the order of 10% to 15% are acceptable. This method is based on single-phase analysis, neglecting the influence of ground mode surge propagation. A more complex method is provided by formulas to model the three-phase and ground mode propagation. The formulas can be used with calculators or personal computers.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | IEEE Std C62.21-2003 Cover |
| 3 | Titlepage |
| 5 | Introduction |
| 6 | Participants |
| 8 | CONTENTS |
| 9 | 1. Overview |
| 10 | 1.1 Scope 1.2 Purpose 2. References |
| 12 | 3. Definitions |
| 13 | 4. The basic means of machine surge protection |
| 14 | 4.1 The fundamental protective system |
| 15 | 4.2 Risk analysis |
| 16 | 4.3 Multi-turn machine impulse voltage withstand strength 4.3.1 Source basis for guide |
| 18 | 4.3.2 Voltage withstand tests |
| 19 | 5. Sources of surges 5.1 General |
| 20 | 5.2 Remote and local origin surges 5.3 Remote origin surges 5.3.1 Faults and operating conditions 5.3.2 Lightning |
| 21 | 5.3.3 Machines within a plant 5.3.4 Surges transferred through local transformer 5.4 Surges from faults, local origin 5.4.1 Machine insulation failure, end-turn insulation fault |
| 22 | 5.4.2 Machine insulation failure, internal stator turn winding fault 5.4.3 Local ground potential rise (GPR) 5.5 Switching surges, local origin 5.6 Historical background, motor starting surges |
| 23 | 5.7 Surges during de-energizing motors |
| 24 | 5.8 Full-voltage motor starting, prestrike voltage |
| 27 | 5.9 Limitations of surge capacitor protection |
| 28 | 6. Motor surge protection 6.1 Reasons for surge protection of motors started across-the-line (full-voltage start) |
| 29 | 6.2 Strategies for motor surge protection |
| 30 | 6.3 Practical calculation of full-voltage starting surges at motor terminals 6.3.1 Sensitivity study for one configuration |
| 33 | 6.3.2 Look-up tables of surge levels and time constants for estimating the need for surge protection of a motor |
| 39 | Annex A—Formulas for calculators or personal computers |
| 46 | Annex B—Bibliography |
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