NEMA-PB-2.2-2004.pdf
《NEMA-PB-2.2-2004.pdf》由会员分享,可在线阅读,更多相关《NEMA-PB-2.2-2004.pdf(42页珍藏版)》请在三一文库上搜索。
1、 NEMA PB 2.2 NEMA PB 2.2 APPLICATION GUIDE FOR GROUND FAULT PROTECTIVE DEVICES FOR EQUIPMENT Copyright National Electrical Manufacturers Association Provided by IHS under license with NEMALicensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 08:40:12 MDTNo reproduction or network
2、ing permitted without license from IHS -,-,- Copyright National Electrical Manufacturers Association Provided by IHS under license with NEMALicensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 08:40:12 MDTNo reproduction or networking permitted without license from IHS -,-,- NEM
3、A Standards Publication PB 2.2-2004 Application Guide for Ground Fault Protective Devices for Equipment Published by: National Electrical Manufacturers Association 1300 North 17th Street, Suite 1847 Rosslyn, Virginia 22209 www.nema.org Copyright 2004 by the National Electrical Manufacturers Associat
4、ion. All rights including translation into other languages, reserved under the Universal Copyright Convention, the Berne Convention for the Protection of Literacy and Artistic Works, and the International and Pan American Copyright Conventions. Copyright National Electrical Manufacturers Association
5、 Provided by IHS under license with NEMALicensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 08:40:12 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright 2004 by the National Electrical Manufacturers Association. NOTICE AND DISCLAIMER The informat
6、ion in this publication was considered technically sound by the consensus of persons engaged in the development and approval of the document at the time it was developed. Consensus does not necessarily mean that there is unanimous agreement among every person participating in the development of this
7、 document. The National Electrical Manufacturers Association (NEMA) standards and guideline publications, of which the document contained herein is one, are developed through a voluntary consensus standards development process. This process brings together volunteers and/or seeks out the views of pe
8、rsons who have an interest in the topic covered by this publication. While NEMA administers the process and establishes rules to promote fairness in the development of consensus, it does not write the document and it does not independently test, evaluate, or verify the accuracy or completeness of an
9、y information or the soundness of any judgments contained in its standards and guideline publications. NEMA disclaims liability for any personal injury, property, or other damages of any nature whatsoever, whether special, indirect, consequential, or compensatory, directly or indirectly resulting fr
10、om the publication, use of, application, or reliance on this document. NEMA disclaims and makes no guaranty or warranty, expressed or implied, as to the accuracy or completeness of any information published herein, and disclaims and makes no warranty that the information in this document will fulfil
11、l any of your particular purposes or needs. NEMA does not undertake to guarantee the performance of any individual manufacturer or sellers products or services by virtue of this standard or guide. In publishing and making this document available, NEMA is not undertaking to render professional or oth
12、er services for or on behalf of any person or entity, nor is NEMA undertaking to perform any duty owed by any person or entity to someone else. Anyone using this document should rely on his or her own independent judgment or, as appropriate, seek the advice of a competent professional in determining
13、 the exercise of reasonable care in any given circumstances. Information and other standards on the topic covered by this publication may be available from other sources, which the user may wish to consult for additional views or information not covered by this publication. NEMA has no power, nor do
14、es it undertake to police or enforce compliance with the contents of this document. NEMA does not certify, test, or inspect products, designs, or installations for safety or health purposes. Any certification or other statement of compliance with any health or safety related information in this docu
15、ment shall not be attributable to NEMA and is solely the responsibility of the certifier or maker of the statement. Copyright National Electrical Manufacturers Association Provided by IHS under license with NEMALicensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 08:40:12 MDTNo
16、reproduction or networking permitted without license from IHS -,-,- PB 2.2-2004 Page i Copyright 2004 by the National Electrical Manufacturers Association. CONTENTS Page Foreword . iii Section 1 GENERAL 1.1 Scope1 1.2 Referenced Standards .1 1.2.1 Other References.2 Section 2 INTRODUCTION 2.1 Arcing
17、 Ground Faults4 2.2 Need for Ground Fault Protection 4 2.3 Standards .4 2.4 Application, General.5 2.5 Relay Setting Selections, General5 2.6 Methods of GFP Device Selectivity5 2.7 Damage Levels.5 Section 3 POWER CIRCUIT 3.1 Voltage .6 3.2 Frequency.6 3.3 Current Rating6 3.4 Location of Ground Fault
18、 Sensing Devices6 3.4.1 Ground Return Method 6 3.4.2 Outgoing Circuit Method (Residual or Zero-Sequence) 6 3.5 Ground Connections.6 3.6 Mounting and Connection of Ground Fault Sensing Devices7 3.7 Delta Connected Systems7 3.8 Neutrals and Grounding .7 3.9 Need for Complete System Information.7 3.10
19、Systems Containing Transformers.8 3.11 System Design .8 Section 4 CONTROL CIRCUIT 4.1 Control Power.9 4.2 AC Control Power.9 4.3 DC Control Power.9 4.4 Control Circuit Protection .9 4.5 Control Wiring.9 4.6 Indication and Test Circuits9 4.7 Compatibility of GFP Devices.9 Section 5 TYPICAL APPLICATIO
20、N DIAGRAMS 5.1 General .10 5.1.1 Abbreviations10 5.2 Ground Fault Protection on Main Disconnect Only, Ground Return Type.10 5.3 Ground Fault Protection on Main Disconnect Only, Outgoing Circuit Type.11 5.4 Ground Fault Protection on Main and Feeder Disconnects, Ground Return Type on Main12 5.5 Groun
21、d Fault Protection on Main and Feeder Disconnects, Outgoing Circuit Type on Main.13 5.6 Ground Fault Protection on Main and Feeder Disconnects with Zone Selective Interlocking, Ground Return Type on Main 14 5.7 Ground Fault Protection on Main, Feeders, and Selected Branch Disconnects with Zone Selec
22、tive Interlocking, Outgoing Circuit Type on Main.15 5.8 Double-Ended System with Ground Fault Protection on Mains, Tie, and Feeder Disconnects, Ground Return Type on Mains.16 Copyright National Electrical Manufacturers Association Provided by IHS under license with NEMALicensee=NASA Technical Standa
23、rds 1/9972545001 Not for Resale, 04/19/2007 08:40:12 MDTNo reproduction or networking permitted without license from IHS -,-,- PB 2.2-2004 Page ii Copyright 2004 by the National Electrical Manufacturers Association. Section 6 TIME AND CURRENT SETTINGS 6.1 Application of Ground Fault Protective Syste
24、ms for Coordinated Ground Fault Tripping .18 6.2 Types of Coordinated Ground Fault Tripping Systems18 6.3 Time-Current Band Selective System18 6.4 Zone Selective System.18 6.5 Coordination of Low-Voltage Disconnects with the High-Voltage Side of a System .19 6.6 Coordination with Downstream Overcurr
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- NEMA PB 2.2 2004
链接地址:https://www.31doc.com/p-3788746.html