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IEEE 522-2023

$33.58

IEEE Guide for Testing Turn Insulation of Form-Wound Stator Coils for Alternating-Current Electric Machines (Published)

Published By Publication Date Number of Pages
IEEE 2023 34
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Revision Standard – Active. Made in this guide are suggestions on testing the dielectric strength of the insulation separating the various turns from each other within multi-turn form-wound coils to determine the acceptability of the coils. Typical ratings of machines employing such coils normally lie within the range of 200 kW to 100 MW. Test voltage levels described herein do not evaluate the ability of the turn insulation to withstand abnormal voltage surges, as contrasted to surges associated with normal operation. These suggestions apply to the following: a) Individual stator coils after manufacture b) Coils in completely wound stators of original manufacture c) Coils and windings for rewinds of used machinery d) Windings of machines in service to determine their suitability for further service (preventive-maintenance testing) The repetitive voltage surges (spikes) associated with Variable Frequency Drives (VFDs) are not addressed here.

PDF Catalog

PDF Pages PDF Title
2 Title page
4 Important Notices and Disclaimers Concerning IEEE Standards Documents
8 Participants
10 Introduction
11 Contents
12 1. Overview
1.1 Scope
1.2 Purpose
13 1.3 Word usage
2. Normative references
3. Service conditions
3.1 Operating voltage
3.2 Transient voltage
14 3.3 Turn insulation withstand requirements
4. Suggested test devices
4.1 Test requirements
4.2 Suitable devices
15 5. Test procedure
5.1 Test during various stages of manufacturing
16 5.2 Optional destruct coil testing
6. Surge test levels for new coils
6.1 General
6.2 Standard 3.5 per unit surge test
17 6.3 Alternate 2.0 per unit surge test
6.4 Abnormal surges
18 6.5 Precautions
6.6 Reduction in test levels for uncured and resin rich coils
7. Maintenance tests or tests after installation of machines
7.1 Test voltage level
7.2 Conduction-type devices
7.3 Induction-type devices
19 7.4 Other methods/further details
20 Annex A (informative) Test procedures and methods for induction type devices
A.1 Method for applying surge tests to complete windings
22 A.2 Suggested test procedure for wound machine
23 A.3 Suggested test procedure for coils during winding (if surge comparison equipment is not available)
24 A.4 Further details
A.5 Marx generator circuit
25 Annex B (informative) The surge voltage withstand envelope
B.1 Definition of surge withstand envelopes
B.2 Standard 3.5 per unit withstand envelope
26 B.3 Alternate 2.0 per unit withstand envelope
28 Annex C (informative) Suggested sample test form
29 Annex D (informative) Bibliography
34 Back cover
IEEE 522-2023
$33.58