NASA Technical Reports Server (NTRS) 19940024196: Robust 300 C wire insulation system

8 Pages·0.12 MB·English

by  NASA Technical Reports Server (NTRS)

ROBUST 300 °C WIRE INSULATION SYSTEM
N94- 28699
John G. Nairus
U,S. Air Force
Wright Patterson Air Force Base, Ohio
OBJECTIVE
IDENTIFY, DEVELOP AND DEMONSTRATE AN OPTIMUM WIRE
INSULATION SYSTEM CAPABLE OF CONTINUOUS OPERATION AT
300°C WHICH POSSESSES A COMBINATION OF SUPERIOR
ELECTRICAL (AC OR DC), MECHANICAL, AND PHYSICAL
PROPERTIES OVER KAPTON R DERIVED INSULATIONS DESCRIBED
IN MIL-W-81381 AND THOSE HYBRID CONSTRUCTIONS IDENTIFIED
IN AIR FORCE CONTRACT F33615-89-C-5606 COMMONLY KNOWN AS
TKT CONSTRUCTIONS.
APPROACH
TASK h FILM/ADHESIVE CANDIDATE SCREENING
\ \
TASK Ih DETAILED FILM/ADHESIVE SYSTEM TESTING I
\ \
TASK IIh INITIAL WIRE INSULATION AND TESTING I
\ \
I TASK IV: DETAILED WIRE TESTING
19
FILM/ADHESIVE CANDIDATE
SCREENING
DESIGN OF EXPERIMENTS,, (DOX) APPROACH FOR CANDIDATE SELECTION I
• MINIMUM OF SIX CANDIDATES
• CAST FILM CANDIDATES
• DETERMINE KEY ELECTRICAL AND MECHANICAL PROPERTIES
TASK I PROPERTIES
TABLE h PROPOSED TASK I SCREENING
PROPERTIES TO BE DETERMINED
Property to be Determined Method of Determination
I
Electrical
DielectncConstantat400Hzand 1000Hz ASTMD-150
atRT,280°C, and300°C
DissipationFactoratconditionsstated ASTM D-150
above
BreakdownVoltage(ACat60 Hz andDC) ASTMD-149
atRT, 280°C, and300°C
ArcTrackingatRT ASTM-495-84
Mechanical
I III I
Tensilestrength,elongationtoDreak,and ASTM D-882-64T
modulusatRT, 280°C, and300°C
LapsheartensilestrengthsatRT, 280°C, Modificationtoabovetensileme[hod
and300°C
Dynamicworkloss(tandelta) Rheometricsdynamicanalyzerfrom
<-100°C tO+ 500°C
2O
DETAILED FILM/ADHESIVE
SYSTEM TESTING
TASK ICANDIDATES
FOUR i,_--ir SBAOMNPDLESAAMGPILNEGS (B(POFNPDIED/,AFRU7N0B0O)NDED,
CONTROL)
- HIGH HUMIDITY
-- AFILROCWRIANFGT AFIRLUID(S)
i
SAMPLE TESTING I_ ! TWO CANDIDATES !
INITIAL WIRE INSULATION
AND TEST
f C.SCT_,_u_AsNADO._SIVES
TWTOASKC.ANO.OI_A_TE.NSmW.L.RWERAP
INSULATED WIRE TESTS
I ONE CANDIDATE I
le: -- AFLBERXASUIOFNE
- DRY ARC TRACK
MIL-W-81381 '
,_PTON DERIVED CONTROL I
21
DETAILED WIRE TESTING
FINAL WIRE WRAP
I ONE TASK III CANDIDATE I
--_ DETAILED WIRE TEST (BEFORE,
KAPTON MDILE-RWIV-8E1D381CONTROL DURING, AFTER AGING)
I (TESTS BEYOND TASK III)
ie: - DYNAMIC CUT THROUGH
- WET ARC TRACK
LIFE CYCLE ANALYSIS
NASA ENVIRONMENTS
I PRESSURIZED MODULE I
- PROPOSED MATERIALHASSUCCESSFULLY COMPLETED LONGTERM AGINGTESTS IN
OXYGEN INPREVIOUS AFPROGRAM
ITRANS-ATMOSPHERIC VEHICLE I
- PROPOSED MATERIALHAS SUCCESSFULLY COMPLETED VACUUM, UVAGING, AND
TEMPERATURE TESTS INPREVIOUS AFPROGRAM
- HAVE NOT DONECOMBINED TESTS (is: PLASMAEFFECTS)
! LUNAR AND MARTIAN I
-POLYIMIDES KNOWNFOR RADIATION RESISTANCE
I LEOIGEO I
-WLHAS SPACETESTED FILMSAMPLESWHICH ARE BEING DELIVERED FOR TEST
ANDANALYSIS
I ADDITIONAL NOTES I
- PROPOSED SYSTEM SHOULD NOTBEAFFECTED BYGRAVITY
- EXISTING POLYIMIDE TECHNOLOGY ALREADYEXCEEDS LIFETIME REQUIREMENTS
- 160VDC SHOULD BEFEASIBLEBASEDONBDV TESTS
22
NASA APPROACH
TNAASSKA hOPERATIONAL ENVIRONMENTS I
I
ITASK I1:
INSULATION TEST AND ANALYSIS |
I
TASK Ill-
WIRING SYSTEMS TECHNOLOGY
TASK IV:
MANAGEMENT PLANNING
CONCLUSIONS
i
OPPORTUNITIES EXIST FOR COOPERATIVE NASA/AIR FORCE EFFORTS
- INSULATION CONTRACT IS FLEXIBLE BUT ALREADY ADDRESSES
NASA CONCERNS/ISSUES
- GENERIC AIR FORCE ELECTRICAL LOAD MANAGEMENT
TECHNOLOGY IS APPLICABLE
N/ A
AIR fORGE MATERIEL COMMAND
23

SESSION II
WIRING APPLICATIONS AND STANDARDS
_IR_,_N6 PA;._ f_LANK NOT F_..MED