ANSI UL 977-2012 UL Standard for Safety Fused Power-Circuit Devices (Fifth Edition Reprint with revisions through and including July 29 2016)《动力线熔断保险装置用安全性标准(提案日期10-07-11)》.pdf
《ANSI UL 977-2012 UL Standard for Safety Fused Power-Circuit Devices (Fifth Edition Reprint with revisions through and including July 29 2016)《动力线熔断保险装置用安全性标准(提案日期10-07-11)》.pdf》由会员分享,可在线阅读,更多相关《ANSI UL 977-2012 UL Standard for Safety Fused Power-Circuit Devices (Fifth Edition Reprint with revisions through and including July 29 2016)《动力线熔断保险装置用安全性标准(提案日期10-07-11)》.pdf(73页珍藏版)》请在麦多课文档分享上搜索。
1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 977 Fused Power-Circuit Devices STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHO
2、RIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Fused Power-Circuit Devices, UL 977 Fifth Edition, Dated April 30, 2012 Summary of Topics: This revision to ANSI/UL 977 is being issued to reaffirm approval as an American National Standard. No chang
3、es in requirements are involved. The new requirements are substantially in accordance with Proposal(s) on this subject dated June 3, 2016. The revisions dated July 29, 2016 include a reprinted title page (page 1) for this Standard. Text that has been changed in any manner or impacted by ULs electron
4、ic publishing system is marked with a vertical line in the margin. Changes in requirements are marked with a vertical line in the margin and are followed by an effective date note indicating the date of publication or the date on which the changed requirement becomes effective. All rights reserved.
5、No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwise without prior permission of UL. UL provides this Standard as is without warranty of any kind, either expressed or implied
6、, including but not limited to, the implied warranties of merchantability or tness for any purpose. In no event will UL be liable for any special, incidental, consequential, indirect or similar damages, including loss of prots, lost savings, loss of data, or any other damages arising out of the use
7、of or the inability to use this Standard, even if UL or an authorized UL representative has been advised of the possibility of such damage. In no event shall ULs liability for any damage ever exceed the price paid for this Standard, regardless of the form of the claim. Users of the electronic versio
8、ns of ULs Standards for Safety agree to defend, indemnify, and hold UL harmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonable attorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronic Standard on the pu
9、rchasers computer system. JULY 29, 2016 UL 977 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JULY 29, 2016 UL 977 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION
10、 FROM UL APRIL 30, 2012 (Title Page Reprinted: July 29, 2016) 1 UL 977 Standard for Fused Power-Circuit Devices First Edition June, 1973 Second Edition October, 1976 Third Edition June, 1984 Fourth Edition November, 1994 Fifth Edition April 30, 2012 This ANSI/UL Standard for Safety consists of the F
11、ifth Edition including revisions through July 29, 2016. The most recent designation of ANSI/UL 977 as a Reaffirmed American National Standard (ANS) occurred on July 29, 2016. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page, or effective date information. T
12、he Department of Defense (DoD) has adopted UL 977 on August 28, 1984. The publication of revised pages or a new edition of this Standard will not invalidate the DoD adoption. Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time. Proposals should be submi
13、tted via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) at http:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard should be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights re
14、garding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2016 UNDERWRITERS LABORATORIES INC. ANSI/UL 977-2012 (R2016)UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL APRIL 30, 2012 FUSED POWER-CIRCUIT DEVICES - UL
15、 977 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .5 2 Components .6 3 Units of measurement .7 4 References 7 CONSTRUCTION 5 General 7 6 Enclosure 9 6.1 General 9 6.2 Rainproof enclosure
16、s .9 7 Ventilation 11 8 Sheet-Metal Enclosures 12 9 Doors and Covers .12 10 Hinges 14 11 Latches 14 12 Operating Mechanism 15 12.1 General .15 12.2 Electrical operators 16 13 Ground Fault Protection .17 14 Insulating Material .19 15 Current-Carrying Parts .19 16 Wiring Terminals 20 17 Control Circui
17、t .21 18 Lockout 21 19 Fusing .21 20 Spacings .26 21 Wiring Space .27 22 Disconnecting Means 30 23 Provision for Grounding 31 24 Provision for Bonding 31 PERFORMANCE 25 General 32 26 Temperature Test .35 27 Strength of Insulating Base and Support .37 28 Overvoltage Test 38 29 Water Spray Test 38 30
18、Operation Test 38 31 Endurance Test .41 32 200-Percent Overload 41 33 Dielectric Voltage-Withstand Test 42 34 Close-Open Test 44 35 Dielectric Voltage-Withstand (Repeated) Test After the Close-Open Test .45 36 Contact Opening Test 45 37 Dielectric Voltage-Withstand (Repeated) Test After the Contact
19、Opening Test 46 38 Short-Circuit Withstand Test 46 APRIL 30, 2012 FUSED POWER-CIRCUIT DEVICES - UL 977 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 39 Closing Test 50 40 Low-Level Dielectric Voltage-Withstand Test 51 41 Metallic Coating
20、Thickness Test .51 INSTRUMENTATION AND CALIBRATION OF HIGH-CAPACITY CIRCUITS 42 Galvanometers .52 43 Circuit Measurement Verication 53 44 Calibration of Test Circuit .54 44.1 Details 54 44.2 Current 54 44.3 Voltage 56 44.4 Power factor 56 44.5 Recovery voltage 56 MANUFACTURING AND PRODUCTION TEST 45
21、 Operation 58 RATINGS 46 Current 59 47 Voltage .59 48 Withstand 60 49 Control Circuit .60 MARKING 50 Details .60 INSTALLATION TEST PROCEDURES 51 Details .64 APPENDIX A Standards for ComponentsA1 APRIL 30, 2012 FUSED POWER-CIRCUIT DEVICES - UL 977 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER R
22、EPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover fused power-circuit devices to be employed in accordance with the National Electrical Code. 1.2 Fused power-circuit devices, as covered by these requirements, are considered to be either bolted p
23、ressure contact switches or high-pressure butt-type contact switches. 1.3 Bolted-pressure contact switches are devices in which the blade-jaw connections have an additional pressure or clamping action provided at both ends of the switch blades when the blades are in the fully closed position. 1.4 Hi
24、gh-pressure butt-type contact switches are devices having butt-type contacts and a spring-charged mechanism. 1.5 These requirements do not apply to low-voltage AC power circuit protectors as covered by the Standard for Low Voltage AC Power Circuit Protectors Used in Enclosures, ANSI/IEEE C37.29, or
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