IEC TR 63021:2016
(Main)Rotating electrical machinery - Natural graphite brush for slip-ring in wound rotor-type induction motor - Application information
Rotating electrical machinery - Natural graphite brush for slip-ring in wound rotor-type induction motor - Application information
IEC TR 63021:2016(E) presents technical characteristics, application results and practical information on NG-brush for slip-ring obtained through the application of NG-brush in various kinds of wound rotor-type induction motor (large-size water pump, belt conveyer, lift, winder motor, grinding mill and crusher in coal or ore mine; crane, rolling mill, compressor and winder motor for boring in oil or gas facility).
General Information
Standards Content (Sample)
IEC TR 63021 ®
Edition 1.0 2016-09
TECHNICAL
REPORT
Rotating electrical machinery – Natural graphite brush for slip-ring in wound
rotor-type induction motor – Application information
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IEC TR 63021 ®
Edition 1.0 2016-09
TECHNICAL
REPORT
Rotating electrical machinery – Natural graphite brush for slip-ring in wound
rotor-type induction motor – Application information
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.160.01 ISBN 978-2-8322-3602-4
– 2 – IEC TR 63021:2016 © IEC 2016
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references. 6
3 Terms and definitions . 6
4 General remarks . 7
5 General conditions of brush and slip-ring for stability in the operation of a wound
rotor-type induction motor . 7
5.1 Fire-spark . 7
5.2 Life . 7
5.3 Temperature . 8
5.4 Dust diffusion . 8
5.5 Noise . 8
6 Operating characteristics of natural graphite brush for slip-ring in a wound
rotor-type induction motor . 8
6.1 Current density . 8
6.2 Vibration absorbing ability . 8
6.3 Temperature . 8
6.4 Brush’s pressure . 9
7 Testing method . 9
8 Application result . 9
8.1 Fire-spark . 9
8.2 Wear and life of brush . 9
8.3 Life of slip-ring . 9
8.4 Environmental pollution . 9
8.4.1 Dust diffusion by wear of brush . 9
8.4.2 Pollution by noise . 10
8.5 Economic profit . 10
8.5.1 Brush price . 10
8.5.2 Brush life . 10
8.5.3 No accident due to dust diffusion and slip-ring’s life . 10
Annex A (informative) Data from practical application. 11
Bibliography . 12
Table 1 – Typical kinds of brushes . 7
Table 2 – NG-brush’s bulk density, electric resistivity and current density compared with
the copper brush . 8
Table 3 – Comparison of properties for the assessment of vibration absorbing ability . 8
Table 4 – Wear and life of brush . 9
Table 5 – Comparison of wear of NG-brush and copper brush . 9
Table A.1 – Data from practical application . 11
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ROTATING ELECTRICAL MACHINERY –
Natural graphite brush for slip-ring in wound
rotor-type induction motor – Application information
FOREWORD
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The main task of IEC technical committees is to prepare International Standards. However, a
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data of a different kind from that which is normally published as an International Standard, for
example "state of the art".
IEC TR 63021, which is a Technical Report, has been prepared by IEC technical committee 2:
Rotating machinery.
The text of this Technical Report is based on the following documents:
Enquiry draft Report on voting
2/1794/DTR 2/1823A/RVC
Full information on the voting for the approval of this Technical Report can be found in the report
on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
– 4 – IEC TR 63021:2016 © IEC 2016
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
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• replaced by a revised edition, or
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A bilingual version of this publication may be issued at a later date.
INTRODUCTION
This Technical Report has been prepared after considering implications of the withdrawal of
IEC PAS 62072:2005 and its potential conversion into an International Standard, and after
analysing practical information obtained through the application of natural graphite (NG) brush
for slip-ring in wound-rotor type induction motor, compared with copper brush.
Practical values obtained through the application of NG-brushes into slip-rings in various kinds
of wound rotor-type induction motor are given in Annex A.
– 6 – IEC TR 63021:2016 © IEC 2016
ROTATING ELECTRICAL MACHINERY –
Natural graphite brush for slip-ring in wound
rotor-type induction motor – Application information
1 Scope
This document presents technical characteristics, application results and practical information
on NG-brush for slip-ring obtained through the application of NG-brush in various kinds of
wound rotor-type induction motor (large-size water pump, belt conveyer, lift, winder motor,
grinding mill and crusher in coal or ore mine; crane, rolling mill, compressor and winder motor for
boring in oil or gas facility).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
ame
...
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