twisted cables

TWISTED CABLES

TWISTED CABLESOF NETWORK HOW TO DESIGN AND CONSTRUCT THE1 ( Low Voltage Aerial Bundled Conductor System ) ( LV-ABC ) :-

21- ( Self-supporting LV-ABC lines ) :-

16^2 .

32- ( LV-ABC with bare neutral messenger ):-

( Finnish system ) 16^2.

43- ( LV-ABC Lines with insulated neutral messenger ) :-

( french system ) .

5:-1- (neutral ) ( messenger ) 2- ( R-S-T )3- ( STL )

6 :-

( R ) ( S ) ( T )

7 :- ( black extruded high-density polyethylene ) ( rated voltage ) 0.6 1 50 ( highest system voltage ) 1.2 ( test voltage ) 4 50 4 ( short circuit current) 25 0.1

:- 16 ^ ( XLPE )

8Complete cableMessenger c.Street lighting c.Phase conductorTotal mass kg/kmOver all diametermmInsulation thickness mmMintensile strength KNMax diameter mmInsulation thickness mmMax diameter mmInsulation thickness mmMax diameter mmCable size mm^25102617.4614.5173*35+16+25720321.214.28.414.51.28.43*50+16+501180391.214.28.4

14.51.411.73*95+16+50 (1) 9Max short ct. Current 1 sec. duration KAStreet lighting conductor/kmNeutral conductor /kmPhase conductor/kmCable sizemm^21.51.911.380.8683*35+16+2531.910.720.6413*50+16+5031.910.720.3203*95+16+50 (2) 20 10605550454035302520151050Size mm^2627484941021101161241301361421461503*35+16+2571881021141241341421511591661741811863*50+16+501001241451641801952102202352452552652753*95+16+50 (3) 16^2 40 20 . 11 (3) 20 12 Size mm^21301523*35+16+251591833*50+16+502352713*95+16+50 (neutral) :- (messenger ) 4.5 6 ( span ) 50 3*70+50+16 ^2 100 8 ( sag ) ( span ) ( dynamometer ) (4) 25 480 /^2

13Max allowed tensile strength in use/ KNMin allowed tensile strength in use/ KNCable size mm^25.27.43*16+16+255.27.43*25+16+255.27.43*35+16+257.210.33*50+16+3510.314.73*70+16+5014.420.63*95+16+7014.420.63*120+16+70 (4) 70% .14 (5) Critical span/mCable size mm^26423*16+16+255803*25+16+255623*35+16+256703*50+16+357403*70+16+508003*95+16+708003*120+16+70 ( span ) 100 .

15Complete cablemessengerStreet lightingPhase conductorTotal mass of insulated KG/KmOver all diameter of insulated mmTensile strength KNDiameter of un insulated conductor mmDiameter of un insulated conductor mmDiameter of un insulated conductor mmConductor Size mmCable size mm^2210217.464.54.51*161*16+16+25330217.464.54.53*163*16+16+25420247.464.563*253*25+16+25510267.464.573*353*35+16+256703010.374.58.43*503*50+16+359303614.28.44.59.93*703*70+16+5012504120.69.94.511.73*953*95+16+7015004520.69.94.513.23*1203*120+16+70 (6) 16Insulation thickness mmNeutral conductor /km at 20CPhase conductor /km at 20CCable size mm^21 1.911611.381.22510.9860.868351.20.720.641501.40.4930.443701.4

0.32951.6

0.253120 (7) 20 16^2 20 1.91 .17 . 18 ( LV-ABC )

1- (connectors and joints )2- ( hooks and clamps )3- 191- :- (connectors and joints )- (Aluminum to copper connector )

Side viewTop view20Torque NmBoltsH max mmB mmA mmCu-conductor mm^2Al-conductor mm^2Size 17-201m84422292.5-1010-50117-201m85226404-2516-70217-202m85542406-3516-99330-401m1066255416-3563-132430-402m1068455416-9563-1325 (8) - 21- ( aluminum to aluminum connector )

Side viewTop view22Torque NmBoltsH max mmB mmA mmBranch conductor mm^2Main conductor mm^2Size 17-201m844263116-4016-50117-202m852423816-9916-99217-202m853424216-9916-120330 -402m1074455770-15070-1504 (9) - 23- ( tension joints for messenger ) (mid span joint)

.24Messenger mm^2Size251352503704 ( 10) 25- ( connectors covers ) .

26Connector sizeCBACover size1456060123551007024585100903 (11) :- .27- ( dead end types ) ( heat-shrinkable ) .

282- :- ( hooks and clamps )- ( suspension clamps)

25-70 ^2 .

29- ( dead end clamps)

30- ( fixing nail)

16 60 (chewi) 0.7 .

31- ( suspension hook)

( steel-hot dip galvanized )

1 140+- 10 .

2 60 .

.32

- ( steel band)

( buckle ) ( tighten tool) .

333- :-

- ( nylon tie )

.

34 - ( Connector through the insulation for work on live lines)

35 36 ( tools for LV-ABC system )

- ( cable pulleys ) :-

.

37- ( tackle ) :-

.

38 - ( dynamometer ) :-

( 4 ) .

39 - ( tightening tool) :-

( steel band ) .

40 - ( wedge ) :-

.41 - ( cutter) :-

42 - ( brush and grease) :-

( ) ( ) . .

43 ( LV-ABC with insulated neutral ) :- 4.5-5 . 30% . ( suspension hook ) ( steel band) ( cable pulley ) . ( cable drum ) ( dead end clamp) 44 . . (tackle) ( dynamometer ) ( dynamometer ) . . . 1:-

2 :- ( kiosk )

45 . 46 .

47 (STL ) .

48 90 .

49 .

50 .

51 :- . 8 12 45 ( phase ) 22 ( phase ) . .52P=V*I*cos 8=0.22*I*0.8 Iph for single phase house =45AMP P=3*V*I*cos 12=3*0.38*I*0.8 Iph for 3 phase house =22AMPIph total for all the houses=(M*Iph for single phase house )+(N*Iph for 3phase house)M is the number of single phase housesN is the number of 3 phase houses 53 80% ( phase ) 0.8 . .KVA cable= 3*Iph total for all the houses*Vph-ph KVA transformer= KVA cable*0.854 ( ) .

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1976 ... 1999 . :-- 1999 2001- 2001 .- 2002 2003.- 2003 .- 2005 2006 ( ) . :-- ( ) / 2000 .- ( ) 2009 .

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