11 KV(E) AERIAL BUNCHED CABLES GENERALLY TO IS : 7098/PART-2


(Three phase conductors around bare steel messenger)

  Phase Conductor   3x25 3x35 3x50 3x70 3x95 3x120 3x150
  Messenger Conductor   1x55 1x55 1x55 1x55 1x55 1x55 1x55
1. Power/Neutral core:  
1.1 Conductors :  
1. Trade Name   LASER
2. Rated Voltage Kv 6.35x11
3. Reference Standard   Generally to IS 7098 (Part-2)/85
4. PHASE CONDUCTOR  
4.1 Conductor  
i) Material   Aluminium to IS 8130/84, H4 Grade
ii) Nominal cross-sectional area Sqmm 25 35 50 70 95 120 150
iii) Flexibility class as per IS 8130   Class 2 Class 2 Class 2 Class 2 Class 2 Class 2 Class 2
iv) Form of Conductor   Stranded Compacted Circular
v) Max. DC resistance at 20C ohm/km 1.2 0.868 0.641 0.443 0.32 0.253 0.206
vi) Approx conductor diameter mm 6.2 7.3 8.4 10.1 12.0 13.2 14.6
4.2 Conductor Screen  
i) Material & Type   Extruded semi-conducting layer
ii) Min. thickness mm 0.3 0.3 0.3 0.3 0.3 0.3 0.3
4.3 Insulation  
i) Material   Cross-linked Polyethylene to IS 7098 (Part-2)/85
ii) Nominal thickness mm 3.6 3.6 3.6 3.6 3.6 3.6 3.6
4.4 Insulation screen (Non-Metallic)  
i) Material & Type   Extruded semi-conductor layer
ii) Min. Thickness of extruded layer mm 0.3 0.3 0.3 0.3 0.3 0.3 0.3
4.5 Insulation screen (Metallic)  
i) Material & Type   Copper Tape applied helically with overlap
ii) Approx. thickness of copper tape mm 0.045 0.045 0.045 0.045 0.045 0.045 0.045
4.6 Sheath  
i) Material & Tape   PVC Type ST2 to IS 5831/84, Black Colour
ii) Nom. thickness mm 2.0 2.0 2.0 2.0 2.0 2.0 2.0
4.7 Approx. diameter of Power core mm 20.4 21.5 22.6 24.3 26.2 27.4 28.8
5. Bare Messenger  
i) Material   High Tensile galvanized steel strand to IS 398 (Part 2)/96
ii) Nom. Cross Sectional Area Sqmm 35 35 35 55 55 55 55
iii) Form of conductor   Stranded Circular
iv) Approx. breaking load kN 41 41 41 62 62 62 62
v) Approx. messenger diameter mm 7.8 7.8 7.8 9.5 9.5 9.5 9.5
6 Number of Cores  
i) Phase Conductor   3 3 3 3 3 3 3
ii) Bare Messenger   1 1 1 1 1 1 1
7 Identification of Phase conductor   By one, two & three ridges on outer sheath
8 Cable assembly   Phase conductor laid up around the bare messenger
9 Approx. weight of cable kg/km 1590 1760 1940 2385 2490 3040 3370
10 Continuous current carrying capacity of cable when laid freely in air at 50C ambient Air temp. Amps 95 115 140 175 215 250 280
11 Short circuit rating for one second duration  
i) Phase conductor KA 2.4 3.3 4.7 6.6 9.0 11.3 14.2
ii) Copper Screen Amp 200 200 200 200 200 200 200


11 KV(E) AERIAL BUNCHED CABLES GENERALLY TO IS : 7098/PART-2


(Three phase conductors around bare steel messenger)

  Phase Conductor   3x185 3x240 3x300
  Messenger Conductor   1x90 1x90 1x90
1. Trade Name   LASER
2. Rated Voltage Kv 6.35x11
3. Reference Standard   Generally to IS 7098 (Part-2)/85
4. PHASE CONDUCTOR    
4.1. Conductor    
i) Material   Aluminium to IS 8130/84, H4 Grade
ii) Nominal cross-sectional area Sqmm 185 240 300
iii) Flexibility class as per IS 8130   Class 2 Class 2 Class 2
iv) Form of Conductor   Stranded Compacted Circular
v) Max. DC resistance at 20C ohm/km 0.164 0.125 0.1
vi) Approx conductor diameter mm 16.2 18.6 20.6
4.2 Conductor Screen  
i) Material & Type   Extruded semi-conducting layer
ii) Min. thickness mm 0.3 0.3 0.3
4.3 Insulation  
i) Material   Cross-linked Polyethylene to IS 7098 (Part-2)/85
ii) Nominal thickness mm 3.6 3.6 3.6
4.4 Insulation screen (Non-Metallic)  
i) Material & Type   Extruded semi-conductor layer
ii) Min. Thickness of extruded layer mm 0.3 0.3 0.3
4.5 Insulation screen (Metallic)  
i) Material & Type   Copper Tape applied helically with overlap
ii) Approx. thickness of copper tape mm 0.045 0.045 0.045
4.6 Sheath  
i) Material & Tape   PVC Type ST2 to IS 5831/84, Black Colour
ii) Nom. thickness mm 2.0 2.0 2.0
4.7 Approx. diameter of Power core mm 30.8 33.2 35.2
5. Bare Messenger  
i) Material   High Tensile galvanized steel strand to IS 398 (Part 2)/96
ii) Nom. Cross Sectional Area Sqmm 90 90 90
iii) Form of conductor   Stranded Circular
iv) Approx. breaking load kN 103 103 103
v) Approx. messenger diameter mm 12.3 12.3 12.3
6 Number of Cores  
i) Phase Conductor   3 3 3
ii) Bare Messenger   1 1 1
7 Identification of Phase conductor   By one, two & three ridges on outer sheath
8 Cable assembly   Phase conductor laid up around the bare messenger
9 Approx. weight of cable kg/km 4160 4820 5515
10 Continuous current carrying capacity of cable when laid freely in air at 50C ambient Air temp. Amps 325 400 445
11 Short circuit rating for one second duration  
i) Phase conductor KA 17.5 22.6 28.3
ii) Copper Screen Amp 200 200 200

11 KV(E) AERIAL BUNCHED CABLES GENERALLY TO IS : 7098/PART-2


(Three phase conductors around bare steel messenger)

  Phase Conductor   3x185 3x240 3x300
  Messenger Conductor   1x90 1x90 1x90
1. Trade Name   LASER
2. Rated Voltage Kv 6.35x11
3. Reference Standard   Generally to IS 7098 (Part-2)/85
4. PHASE CONDUCTOR    
4.1. Conductor    
i) Material   Aluminium to IS 8130/84, H4 Grade
ii) Nominal cross-sectional area Sqmm 185 240 300
iii) Flexibility class as per IS 8130   Class 2 Class 2 Class 2
iv) Form of Conductor   Stranded Compacted Circular
v) Max. DC resistance at 20C ohm/km 0.164 0.125 0.1
vi) Approx conductor diameter mm 16.2 18.6 20.6
4.2 Conductor Screen  
i) Material & Type   Extruded semi-conducting layer
ii) Min. thickness mm 0.3 0.3 0.3
4.3 Insulation  
i) Material   Cross-linked Polyethylene to IS 7098 (Part-2)/85
ii) Nominal thickness mm 3.6 3.6 3.6
4.4 Insulation screen (Non-Metallic)  
i) Material & Type   Extruded semi-conductor layer
ii) Min. Thickness of extruded layer mm 0.3 0.3 0.3
4.5 Insulation screen (Metallic)  
i) Material & Type   Copper Tape applied helically with overlap
ii) Approx. thickness of copper tape mm 0.045 0.045 0.045
4.6 Sheath  
i) Material & Tape   PVC Type ST2 to IS 5831/84, Black Colour
ii) Nom. thickness mm 2.0 2.0 2.0
4.7 Approx. diameter of Power core mm 30.8 33.2 35.2
5. Bare Messenger  
i) Material   High Tensile galvanized steel strand to IS 398 (Part 2)/96
ii) Nom. Cross Sectional Area Sqmm 90 90 90
iii) Form of conductor   Stranded Circular
iv) Approx. breaking load kN 103 103 103
v) Approx. messenger diameter mm 12.3 12.3 12.3
6 Number of Cores  
i) Phase Conductor   3 3 3
ii) Bare Messenger   1 1 1
7 Identification of Phase conductor   By one, two & three ridges on outer sheath
8 Cable assembly   Phase conductor laid up around the bare messenger
9 Approx. weight of cable kg/km 4160 4820 5515
10 Continuous current carrying capacity of cable when laid freely in air at 50C ambient Air temp. Amps 325 400 445
11 Short circuit rating for one second duration  
i) Phase conductor KA 17.5 22.6 28.3
ii) Copper Screen Amp 200 200 200

HT AERIAL BUNCHED CABLES

In HT Aerial Bunched Cables the phase conductor consists of stranded circular compacted Aluminium conductor, conductor screened with extruded semicon compound, Insulated with cross linked polyethylene (XLPE), Insulation screened with extruded Semicon Compound followed by copper tape or plastic coated Aluminium tape, outer sheathed with PVC or black weather resistant polyethylene and three such phase conductor are twisted around bare stranded circular compacted Aluminium Alloy Messenger conductor which takes all the mechanical stress and also serve as the earth cum neutral conductor.

Application Standard

  • IS : 10810-1984 : Methods of Test for Cables
  • IS : 8130-1984 : Conductors for Insulated Cables
  • IS : 6474-1984 : Polyethylene Insulation of Cables
  • IS : 398 (Part-IV)-1979 : Aluminium Alloy Conductors
  • IS : 14255-1995
  • IS : 7098-Part 1 & 2