1、 AEROSPACE STANDARD CABLE ASSEMBLY, EXTERNAL ELECTRIC POWER, AIRCRAFT, SINGLE-JACKETED 270 VDC, 90 KW AS7974/5Copyright 2017 SAE International All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mec
2、hanical, 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 USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org ISSUED2010-01 REAFFI
3、RMED2015-04 REVISED2017-07THIRD ANGLE PROJECTION CUSTODIAN: AE-8/AE-8A REV.AFEDERAL SUPPLY CLASS 6150 AS7974/5 SHEET 1 OF 3 REV. A PROCUREMENT SPECIFICATION: 7974 SAETechnicalStandardsBoard Rulesprovidethat:“Thisreportispublished bySAEto advance the state oftechnicaland engineering sciences.The use
4、ofthisreportisentirelyvoluntary,anditsapplicabilityandsuitabilityforanyparticularuse,includinganypatentinfringementarising therefrom,isthe sole responsibilityoftheuser.”SAEreviewseachtechnicalreportatleasteveryfiveyearsatwhich time itmaybe revised,reaffirmed,stabilized,orcancelled.SAEinvitesyourwrit
5、ten commentsandsuggestions.SAE values your input. To provide feedback on this Technical Report, please visit http:/standards.sae.org/AS7974/5A RATIONALE CHANGE REQUIRED TO CORRECT AS20659-124 AND -123 TERMINALS LISTED IN FIGURE 1. NOTICE THE COMPLETE REQUIREMENTS FOR PROCURING THE PRODUCT DESCRIBED
6、HEREIN SHALL CONSIST OF THIS DOCUMENT AND THE LATEST ISSUE OF AS7974. CABLE DIAGRAM WIRE DIAGRAM FIGURE 1- CABLE ASSEMBLY AEROSPACE STANDARD AS7974/5 SHEET 2 OF 3 REV. A CABLE ASSEMBLY, EXTERNAL ELECTRIC POWER, AIRCRAFT, SINGLE-JACKETED 270 VDC, 90 KW REQUIREMENTS 1. QUALIFICATION AND QUALITY CONFOR
7、MANCE QUALIFICATION REQUIRED IN ACCORDANCE WITH AS7974. VOLTAGE DROP WITHOUT SALT SPRAY IS REQUIRED FOR QUALITY CONFORMANCE. A SPECIFIC DETAILED TEST METHOD MUST BE SUPPLIED TO THE QUALIFYING ACTIVITY FOR APPROVAL, DESCRIBING HOW THE VOLTAGE DROP TEST WILL BE PERFORMED NONDESTRUCTIVELY AS A QUALITY
8、CONFORMANCE TEST ON 100% OF CABLE ASSEMBLIES PRODUCED. VOLTAGE DROPS SHALL NOT EXCEED VALUES SPECIFIED IN TABLE III OF AS7974. 2. DESIGN & CONSTRUCTION DIMENSIONS ARE IN INCHES. UNLESS OTHERWISE SPECIFIED, TOLERANCE IS 0.X= O.25, 0.XX= 00.76, 0.XXX= 0.254, INCHES AND ANGLES ARE 2. CABLE LENGTH (L) I
9、S SPECIFIED IN TABLE 2. PLUG BODY CONFIGURATION IS OPTIONAL, BUT SHALL BE FULLY MOLDED TO THE CABLE. CABLE SHALL BE ACCORDANCE WITH AS5756/7. MATERIALS ARE IN ACCORDANCE WITH AS7974. 3. IDENTIFICATION MARKING PLUG MARKING SHALL INCLUDE MANUFACTURE NAME, DATE CODE, CAGE CODE, AND PART NUMBER MOLDED O
10、R HEAT IMPRESSED (SEE FIGURE 1 NOTE ). IF A MANUFACTURER SYMBOL IS USED, IT SHALL BE REGISTERED IN AIR1351. POWER INPUT WIRES SHALL BE TERMINATED WITH QUALIFIED AS7928 TERMINALS AS SHOWN IN FIGURE 1. POWER CONTACTS SHALL BE CRIMPED WITH QUALIFIED AS5259/1 TOOL OR EQUIVALENT. BAND TENSILE STRENGTH IS
11、 NOT REQUIRED. WIRE TERMINATIONS SHALL BE IN ACCORDANCE WITH TABLE 1. TABLE 1 - WIRE TERMINATION REQUIREMENTS PLUG CONTACT WIRE TERMINATION DESIGNATION NEGATIVE PHASE (-) POSITIVE PHASE (+) SIGNAL WIRES (1) SIGNAL WIRE (2) SIGNAL WIRE (3 & 4) 8 WIRES (BLACK ) 2 WIRES (BLUE- #3 & #6) 8 WIRES (RED) 2
12、WIRES (BLUE- #1 & #4) 2 WIRES (BLUE- #2 & #5) LOOPED (14 AWG) TERMINAL WIRE TERMINATION DESIGNATION A1 A2 B C D 8 WIRES (BLACK ) 2 WIRES (BLUE- #3 & #6) 8 WIRES (RED) 2 WIRES (BLUE- #1 & #4) 2 WIRES (BLUE- #2 & #5) AEROSPACE STANDARD AS7974/5 SHEET 3 OF 3 REV. A CABLE ASSEMBLY, EXTERNAL ELECTRIC POW
13、ER, AIRCRAFT, SINGLE-JACKETED 270 VDC, 90 KW 4. UNUSED CONDUCTOR ISOLATION TEST REQUIRED FOR QUALIFICATION AND QUALITY CONFORMANCE. A 270 VOLT DIRECT CURRENT SHALL BE APPLIED TO THE ALL POWER LEADS (NEGATIVE AND POSITIVE PHASES). THE UNUSED WIRES (#2 & #5) SHALL BE CONNECTED ELECTRICALLY THEN TESTED
14、 FOR CURRENT LOST. THE CURRENT LEAKAGE SHALL NOT EXCEED 1 MILLIAMP. 5. CABLE ATTACHMENT TO PLUG (TENSION ON PLUG) TEST IN ACCORDANCE WITH AS7974, EXCEPT APPLY FORCE FROM THE REAR OF THE PLUG BODY AND THE CABLE NEAR THE REAR OF THE PLUG BODY. 6. CABLE ATTACHMENT TO CRIMP BARREL AND LUG TERMINAL CABLE
15、 ATTACHMENT TO LUG TERMINAL AND CRIMP BARREL TEST ACCORDING TO MIL-C-7974, EXCEPT APPLY THE FORCE BETWEEN THE LUG TERMINAL OR CRIMP BARREL AND EACH INDIVIDUAL WIRE OF A POWER, NEUTRAL, OR CONTROL LEG. TERMINAL TENSILE STRENGTH SHALL BE IN ACCORDANCE WITH AS7928. 7. PLUG ENGAGEMENT PLUG SHALL FULLY E
16、NGAGE IN AN AS81790/1 CONNECTOR AS SPECIFIED IN AS7974. THE ENGAGING FORCE SHALL NOT EXCEED 100 POUNDS. THE DISENGAGING FORCE SHALL BE 80 POUNDS 20 POUNDS. 8. SPECIFICATION PART NUMBER M7974 /5 -1 I I I I I I_ CABLE ASSEMBLY DESIGNATION PART NUMBER (SEE TABLE 2) I I I I_ AS7974 DETAIL SPECIFICATION
17、NUMBER I I_ GENERAL SPECIFICATION NUMBER TABLE 2 - AS7974 PART NUMBERS PART NUMBER CABLE LENGTH (L) LENGTH TOLERANCE (FEET) M7974/5-1 1 +1, -0 M7974/5-15 15 M7974/5-23 23 M7974/5-40 40 +1, -0.5 M7974/5-50 50 M7974/5-60 60 M7974/5-63 63 M7974/5-70 70 +2, -1 M7974/5-73 73 M7974/5-83 83 M7974/5-90 90 M
18、7974/5-100 100 M7974/5-110 110 M7974/5-140 140 SPECIFICATION NOTE 1. REVISION INDICATOR: A CHANGE BAR (I) LOCATED IN THE LEFT MARGIN IS FOR THE CONVENIENCE OF THE USER IN LOCATING AREAS WHERE TECHNICAL REVISIONS, NOT EDITORIAL CHANGES, HAVE BEEN MADE TO THE PREVIOUS ISSUE OF THIS DOCUMENT. AN (R) SYMBOL TO THE LEFT OF THE DOCUMENT TITLE INDICATES A COMPLETE REVISION OF THE DOCUMENT, INCLUDING TECHNICAL REVISIONS. CHANGE BARS AND (R) ARE NOT USED IN ORIGINAL PUBLICATIONS, NOR IN DOCUMENTS THAT CONTAIN EDITORIAL CHANGES ONLY.
