1、_SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising theref
2、rom, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2009 SAE International All rights reserved. No part of this publication ma
3、y be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-4970 (outside US
4、A) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AS5692AAEROSPACESTANDARDAS5692 REV. A Issued 2004-10 Revised 2009-12 Superseding AS5692 (R) ARC
5、 Fault Circuit Breaker ( AFCB), Aircraft, Trip-Free Single Phase and Three Phase 115 VAC, 400 Hz - Constant Frequency RATIONALEUpdate specification to include three phase arc fault circuit breakers update requirements to comprehend three phase requirements.FOREWORDThermal circuit breakers are design
6、ed to react to the heating effect of current carried by wire; and to protect the wire insulation from thermal damage. These protective devices are not designed to detect or react to the short duration of arcing faults that typically occur outside (before approaching) the defined trip region, or Time
7、 versus Current Curve, of the thermal circuit breakers.In addition, arc impedance can reduce low voltage fault current magnitudes appreciably. AFCBs combine active arc fault detection with thermal overload protection into one package. Supplemented with the arc fault detection, the AFCB provides an e
8、quivalent level of thermal protection of existing thermal circuit breakers (typically qualified under AS58091), with the added ability to detect and react to arc fault conditions, thereby mitigating damage that will occur to the wiring system by protracted arcing events. It is important to note that
9、 the primary purpose of the AFCB as stated above is to mitigate damage to the aircraft wiring from the circuit breaker to the first serial load element (examples: LRU, transformer, ballast, rectifier, or connected equipment, etc.). In doing so, the potential of igniting surrounding materials is redu
10、ced, but not eliminated. Use of AFCBs for hazard mitigation/prevention beyond its intended function of mitigating damage to the aircraft wiring should be carefully analyzed and evaluated. NOTE: AS58091 was used as the base document for this AFCB specification as such the tables comprehend future amp
11、 rating expansion from to 200A. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AS5692A Page 2 of 641. SCOPE 1.1 Scope The primary function of this specification is to cover the general requireme
12、nts for manual reset trip-free arc fault/thermal circuit breakers for use in aircraft electrical systems conforming to MIL-STD-704. As a secondary function, this specification may possibly cover the general requirements for AFCBs for use in primary vehicles, other than aircraft, when mounted directl
13、y to the structure. 1.2 Classification AFCBs shall be the Thermal Type, and classified into different styles. Variations from the basic style of each AFCB shall be indicated by the part number from the appropriate specification sheet (see 3.1). 1.2.1 Styles AFCB styles shall consist of all part numb
14、ers covered by one Aerospace Standard or specification sheet. For example: a. All part numbers of AS5692/1 shall be the same style. b. All part numbers of AS5692/2 shall be the same style. The same style classification applies to all Aerospace Standards and specification sheets covered by this speci
15、fication. 1.2.2 Part Number The part numbers for AFCBs in accordance with this specification shall conform to part number scheme below. Alphanumeric characters shall be used to designate variations from the basic style of each circuit breaker. Example of part number scheme (amend p/n to comprehend 2
16、A5)AS5692/1-DA5VL| _ Pushbutton (1.2.4) | _ High Vibration Capability (1.2.6) | _ Auxiliary Terminals (1.2.5) | _ Amperage Rating (1.2.3) | _ Random Vibration Capability (1.2.6) | _ Basic part style AS5692/1 (1.2.1) When a designator for a variation is not applicable it shall be omitted from the par
17、t number. Not all letters are applicable for every specification sheet. Refer to the latest specification sheet and QPL for available and qualified configurations. 1.2.3 Amperage Ratings The amperage rating designator shall be a number specified in each specification sheet to indicate the nominal am
18、perage rating for overload protection. 1.2.4 Pushbuttons The AFCB pushbutton shall be designated as follows. Standard length pushbutton, as specified in the specification sheet shall have no designator letter. L - Extra length pushbutton (see 6.3.9) Copyright SAE International Provided by IHS under
19、license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AS5692A Page 3 of 641.2.5 Auxiliary Switch Terminals The use of auxiliary switch terminals when allowed by the specification sheet shall be designated as follows. AFCBs with standard terminals only
20、, as specified in the specification sheet, shall have no designator letter. A - Auxiliary switch terminals 1.2.6 Vibration Level The vibration level of the AFCB shall be specified in the specification sheet and shall be indicated in the part number by one or more of the following designators. Standa
21、rd sine vibration capabilities shall have no designator. (see 4.7.11.2). V - High Level sine capabilities (see 4.7.11.3). C thru K - Random vibration capabilities (see 4.7.11.1). 1.2.7 Mounting Configurations Unless otherwise specified, the AFCB mounting configuration shall be designated as follows.
22、 Standard bushing mounted circuit breakers shall have no designator. P - Cover-plate mount. 2. APPLICABLE DOCUMENTS 2.1 Government Specifications, Standards and Handbooks 2.1.1 The following specifications, standards and handbooks form a part of this specification to the extent specified herein.Avai
23、lable from the Document Automation and Production Service (DAPS), Building 4/D, 700 Robbins Avenue, Philadelphia, PA 19111-5094, Tel: 215-697-6257, http:/assist.daps.dla.mil/quicksearch/.A-A-52080 Tape, Lacing and Tying, Nylon A-A-52081 Tape, Lacing and Tying Polyester A-A-52082 Tape, Lacing and Tyi
24、ng, TFE-Fluorocarbon A-A-52083 Tape, Lacing and Tying, Glass A-A-52084 Tape, Lacing and Tying, Aramid MIL-I-24768/17 Insulation, Plastic, Laminated, Thermosetting, Glass-Cloth, Silicone-Resin (GSG) MIL-DTL-81381 Wire, Electric, Polyimide Insulated, Copper or Copper Alloy MIL-E-17555 Electronic and E
25、lectrical Equipment, Accessories, and Provisioned Items (Repair Parts); Packaging of MIL-HDBK-454 General Guidelines for Electrical Equipment MIL-I-24768/1 Insulation Plastic, Laminated, Thermosetting, Glass Cloth Melamine Resin MIL-STD-104 Limit for Electrical Insulation Color MIL-STD-1285 Marking
26、of Electrical and Electronic Parts MIL-STD-1916 DOD Preferred Methods for Acceptance of Product Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AS5692A Page 4 of 64MIL-STD-202 Test Method Standar
27、d for Electronic and Electrical Component Parts MIL-STD-704F Aircraft Electrical Power Characteristics MIL-STD-810 Environmental Engineering Considerations and Laboratory Tests MIL-STD-889 Dissimilar Metals (Copies of specifications, standards, handbooks, drawings and other Government documents requ
28、ired by contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting activity.) 2.2 Other Publications ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA
29、19428-2959, Tel: 610-832-9585, www.astm.org. ASTM D 635 Plastics, Rate of Burning and/or Extent and Time of Burning of Self-Supporting Plastics in a Horizontal Position ASTM D 5948 Molding Compounds, Thermosetting SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale,
30、 PA 15096-0001. Tel: 977-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. ARP4754 Certification Considerations for Highly Intergrated or Complex Aircraft Systems ARP4761 Guidelines and Methods for Conducting the Safety Assessment Process on Civil Airborne Systems and Equi
31、pment AS4373 Test Methods for Insulated Electric Wire AS50861 Wire, Electric, Polyvinyl Cloride Insulated, Copper or Copper Alloy AS7928 Terminals, Lug: Splices, Conductor: Crimp Style, Copper, General Specification For AS22759 Wire, Electrical, Fluoropolymer-Insulated, Copper or Copper Alloy AS2275
32、9/34 Wire, Electrical, Fluoropolymer-Insulated, Cross-Linked Modified ETFE, Normal Weight, Tin-Coated Copper, 150C, 600 volt AS25036 Terminal, Lug, Crimp Style, Copper, Insulated, Ring Tongue, Bell Mouthed, Type II, Class 1 (For 105 C Total Conductor Temperature) AS50881 Wiring Aerospace Vehicle AS5
33、8091 Circuit Breakers, Trip-Free, Aircraft General Specification For AS81044 Wire, Electrical, Crosslinked Polyalkene, Crosslinked Alkane-Imide Polymer, or Polyarlyene Insulated, Copper or Copper Alloy AS8879 Screw Threads UNJ Profile, Inch Controlled Radius Root with Increased Minor Diameter Copyri
34、ght SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AS5692A Page 5 of 64Other Publications Available from American National Standards Institute, 25 West 43rdStreet, New York, NY 10036-8002, Tel: 212-642-49
35、00, www.ansi.orgAvailable from American Society for Quality, 600 North Plankinton Avenue, Milwaukee, WI 53203, Tel: 800-248-1946 (United States or Canada) or +1-414-272-8575 (International), www.asq.org.Available from Radio Technical Commission for Aeronautics, Inc., 1828 L Street, NW, Suite 805, Wa
36、shington, DC 20036, Tel: 202-833-9339, www.rtca.org. AIA/NAS NASM 25027 Nut, Self-Locking, 250 deg. F, 450 deg. F, and 800 deg. F ANSI/ASC (Z1.4) Procedure and Tables for Inspection by Attributes DOD/MIL-STD-100 Engineering Drawing Practices ISO 10012-1 Calibration Laboratories and Measuring Test Eq
37、uipment General Requirement ANSI/NCSL Z540-1 Calibration Laboratories and Measuring Test Equipment General Requirement RTCA/DO-160D Environmental Conditions and Test Procedures for Airborne Equipment RTCA/DO-178B Software Consideration in Airborne Systems and Equipment Certification RTCA/DO-254 Desi
38、gn Assurance Guidance for Electronic Hardware 2.3 Order of Precedence In the event of a conflict between the text of this specification and the references cited herein (except for associated detailed specification sheets, specification sheets or AS standards), the text of this specification shall ta
39、ke precedence. Nothing in this specification, however, shall supersede applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Specification Sheets The individual item requirements shall be as specified herein and in accordance with the applicable specifica
40、tion sheet. In the event of any conflict between the requirements of this specification and the specification sheet, the latter shall govern.3.2 Qualification The AFCBs furnished under this specification shall be products that are authorized by the Qualifying Activity for Listing on the applicable Q
41、ualified Products List (see 4.5 and 6.2). 3.2.1 First Article Inspection AFCBs furnished under this specification not covered by specification sheets or not qualified at the time of set for opening bid shall be subjected to the tests specified in 4.5. 3.3 Materials Suitable materials shall be used t
42、hat will enable the AFCBs to conform to the performance requirements of this specification. Acceptance or approval of any constituent material shall not be construed as a guarantee of the acceptance of the finished product. Copyright SAE International Provided by IHS under license with SAENot for Re
43、saleNo reproduction or networking permitted without license from IHS-,-,-SAE AS5692A Page 6 of 643.3.1 Fungus Materials shall be used which are not nutrients for fungus as specified in Guideline 4 of MIL-HDBK-454. The use of fungus resistant materials is not required for sealing calibration screws,
44、terminals or terminal barriers pending review of the qualifying activity.3.3.2 Metal All metals used in the construction of AFCBs shall be corrosion resistant or shall be suitably protected to resist corrosion. The use of dissimilar metals, especially contacts between brass, copper, steel and alumin
45、um or magnesium alloys, shall be avoided. Where contact between dissimilar metals is unavoidable, the metals shall be protected against electrolytic corrosion. Dissimilar metals are defined in MIL-STD-889. When thermostatic bimetals and trimetals are used, corrosion resulting from tests specified he
46、rein shall not adversely affect the performance of the AFCB. 3.3.3 Plastics Plastic materials used in the housing, insulator base, and any internal parts exposed to arcing or surface creepage shall conform to ASTM D 5948 or equivalent and shall not exhibit any deleterious impact on AFCB performance
47、during normal operation or qualification testing. Other types of plastics materials may be used provided the manufacturer submits satisfactory evidence to the activity responsible for qualification.Plastic materials used by the manufacturer must exhibit evidence of satisfactory performance that the
48、materials are suitable for the purpose intended. The plastic materials used shall neither support combustion nor give off noxious gases when subjected to arcs, such as those caused by interrupting heavy short circuit currents (as defined on the specification sheet), or explosions of gaseous vapors to which the materials may be subjected in service. Plastic materials with cellulose fillers will not be permitted in parts that may be subjected to arcing or surface creepage. Plastic materials used shall be certified to exhibit a
