Aerial Bunched Cables, LT Aerial Bunched Cables

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Aerial Bunched Cables

LT Aerial Bunched Cables 1100 Volts (3.5 Core). Reference standard: Generally to IS : 7098(1) 88.

Sl. No.

Description

3 x 25
+
1 x 16
+
1 x 35

3 x 35
+
1 x 16
+
1 x 35

3 x 50
+
1 x 25
+
1 x 35

3 x 70
+
1 x 35
+
1 x 35

3 x 95
+
1 x 50
+
1 x 55

Power/Neutral Core :

1.1

Conductors

Nom. Cross sectional area
(i) Power cores (mm2)
(ii)Neutral cores (mm2)

25
16

35
16

50
25

70
35

95
50

Max. D.C. resistance conductor at 20ºC
(i) Power cores (Ohm/Km)
(ii) Neutral cores (Ohm/Km)

1.20
1.91

0.868
1.910

0.641
1.200

0.443
0.868

0.320
0.641

Approx. diameter of conductor
(i)Power cores (mm)
(ii)Neutral cores (mm)

6.2
5.1

7.3
5.1

8.35
6.20

10.1
7.30

12.00
8.35

1.2

Insulation:
Minimum thickness:
(i)Power cores (mm)
(ii)Neutral cores (mm)

0.9
0.7

1.0
0.9

1.1
0.9

1.1
1.0

Messenger Wire(Bare):
(i) Nom. Cross sectional area (Sq. mm)
(ii) Approx. Breaking load (KN)

35
41

55
62

Current Rating:
Continuous current carrying
capacity of cable in Air at
Ambient temp. 40ºC (Amp.)

122

149

190

235

Approx. weight (Kg./Km.)

580

665

810

1165

1430

Number of Cores:
(i)Power cores
(ii)Neutral cores
(iii) Bare messenger

(No.)    : 3
(No.)    : 1
(No.)    : 1

De-rating factor
De-rating factors for variation in Air Temp.
Air Temp. (ºC) Rating Factor

30	35	40	45	50	55
1.12	1.06	1.0	0.94	0.88	0.83

(i) Identification of power core :
(ii) Laying :

By providing ridges on the insulation:
Three power cores and one Neutral core shall be suitable twisted around bare Steel Messenger./AAAC

Detail of the Power / Neutral core :
(i) Conductor:
a) Material
(b) Flexibility class as per IS:8130/84
(c) Form of Conductor
(ii) Insulation:
(a) Material
(b) Colour of Insulation

Aluminium to IS:8130/84
Class – 2
Compacted circular.

Cross linked Polyethylene to IS: 7098(I)/88
Black

Details of the Messenger wire (Bare)
(i) Material
(ii) Form of Conductor

ACSR/AAAC Conductor to IS:398(II) & (IV) respectively.

Standard circular/ compacted circular.

Top

LT Aerial Bunched Cables 1100 Volts (4 Core). Reference standard: Generally to IS : 7098(1) 88.

Sl. No.

Description

3 x 25
+
1 x 25
+
1 x 35

3 x 35
+
1 x 35
+
1 x 35

3 x 50
+
1 x 50
+
1 x 35

3 x 70
+
1 x 70
+
1 x 55

3 x 95
+
1 x 95
+
1 x 55

Power/Neutral Core :

1.1

Conductors

Nom. Cross sectional area
(i) Power cores (mm2)
(ii)Neutral cores (mm2)

25
25

35
35

50
50

70
70

95
95

Max. D.C. resistance conductor at 20ºC
(i) Power cores (Ohm/Km)
(ii) Neutral cores (Ohm/Km)

1.20
1.20

0.868
0.868

0.641
0.641

0.443
0.443

0.320
0.320

Approx. diameter of conductor
(i)Power cores (mm)
(ii)Neutral cores (mm)

6.2
6.2

7.3
7.3

8.35
8.35

10.1
10.1

12.00
12.00

1.2

Insulation:
Minimum thickness:
(i)Power cores (mm)
(ii)Neutral cores (mm)

0.9
0.9

1.0
1.0

1.1
1.1

Messenger Wire(Bare):
(i) Nom. Cross sectional area (Sq. mm)
(ii) Approx. Breaking load (KN)

35
41

55
62

Current Rating:
Continuous current carrying
capacity of cable in Air at
Ambient temp. 40ºC (Amp.)

122

149

190

235

Approx. weight (Kg./Km.)

610

725

880

1270

1570

Number of Cores:
(i)Power cores
(ii)Neutral cores
(iii) Bare messenger

(No.)    : 3
(No.)    : 1
(No.)    : 1

De-rating factor
De-rating factors for variation in Air Temp.
Air Temp. (ºC) Rating Factor

30	35	40	45	50	55
1.12	1.06	1.0	0.94	0.88	0.83

(i) Identification of power core :
(ii) Laying :

By providing ridges on the insulation:
Three power cores and one Neutral core shall be suitable twisted around bare Steel Messenger./AAAC

Detail of the Power / Neutral core :
(i) Conductor:
a) Material
(b) Flexibility class as per IS:8130/84
(c) Form of Conductor
(ii) Insulation:
(a) Material
(b) Colour of Insulation

Aluminium to IS:8130/84
Class – 2
Compacted circular.

Cross linked Polyethylene to IS: 7098(I)/88
Black

Details of the Messenger wire (Bare)
(i) Material
(ii) Form of Conductor

ACSR/AAAC Conductor to IS:398(II) & (IV) respectively.

Standard circular/ compacted circular.

Top

LT Aerial Bunched Cables 1100 Volts (5 Core) with Street Lighting Conductor. Reference standard: Generally to IS : 6474-71.

Sl. No.

Description

3 x 16
+
1 x 16
+
1 x 25

3 x 25
+
1 x 16
+
1 x 25

3 x 50
+
1 x 16
+
1 x 25

3 x 50
+
1 x 16
+
1 x 35

3 x 70
+
1 x 16
+
1 x 50

3 x 95
+
1 x 16
+
1 x 70

3 x 120
+
1 x 16
+
1 x 70

Power/Neutral Core :

1.1

Conductors

Nom. Cross sectional area
(i) Power cores (mm2)
(ii)Neutral cores (mm2)

16
16

25
16

35
16

50
16

70
16

95
16

120
16

Max. D.C. resistance conductor at 20ºC
(i) Power cores (Ohm/Km)
(ii)Neutral cores (Ohm/Km)

1.91
1.91

1.20
1.91

0.868
0.910

0.641
0.910

0.443
0.910

0.320
1.910

0.253
1.910

Approx. diameter of conductor
(i)Power cores (mm)
(ii)Neutral cores (mm)

4.4
4.4

5.5
4.4

6.8
4.4

7.9
4.4

9.6
4.4

11.3
4.4

12.7
4.4

1.2

Insulation:
Minimum thickness:
(i)Power cores (mm)
(ii)Neutral cores (mm)

1.0
1.0

1.2
1.0

1.4
1.0

1.6
1.0

Messenger Wire(Bare):
(i) Nom. Cross sectional area (Sq. mm)
(ii) Approx. Breaking load (KN)

25
7.5

35
10.3

50
14.7

70
2.06

70
20.6

Current Rating:
Continuous current carrying
capacity of cable in Air at
Ambient temp. 40ºC (Amp.)

105

130

155

180

Approx. weight (Kg./Km.)

610

725

880

1270

1570

1180

1430

Number of Cores:
(i)Power cores
(ii)Neutral cores
(iii) Bare messenger

(No.)    : 3
(No.)    : 1
(No.)    : 1

De-rating factor
De-rating factors for variation in Air Temp.
Air Temp. (ºC) Rating Factor

30	35	40	45	50	55
1.12	1.06	1.0	0.94	0.88	0.83

(i) Identification of power core :
(ii) Laying :

By providing ridges on the insulation.
Three power cores and one Neutral core shall be suitable twisted around bare AAAC Messenger.

Detail of the Power / Neutral core :
(i) Conductor:
a) Material
(b) Flexibility class as per IS:8130/84
(c) Form of Conductor
(ii) Insulation:
(a) Material
(b) Colour of Insulation

Aluminium to IS:8130/84
Class – 2
Compacted circular.

High Density Polyethylene to IS: 6474 - 1971
Black

Details of the Messenger wire (Bare)
(i) Material
(ii) Form of Conductor

All Alloy Aluminium Conductor to IS:398 (IV).
Standard Compacted circular.

Top

LT Aerial Bunched Cables 1100 Volts (4 Core). Reference standard: Generally to IS : 6474 - 71.

Sl. No.

Description

3 x 16
+
1 x 25

3 x 25
+
1 x 25

3 x 35
+
1 x 25

3 x 50
+
1 x 35

Power/Neutral Core :

1.1

Conductors

Nom. Cross sectional area
(i) Power cores (mm2)
(ii) Neutral cores (mm2)

16
25

25
25

35
25

50
35

Max. D.C. resistance conductor at 20ºC
(i) Phase conductor (Ohm/Km)
(ii) Neutral conductor (Ohm/Km)

1.91
1.38

1.20
1.38

0.868
1.38

0.641
0.968

Approx. diameter of conductor
(Compacted))
(i) Phase conductor (mm)
(ii) Neutral conductor (mm)

4.4
5.8

5.5
5.8

6.8
5.8

7.9
6.8

1.2

Insulation:
Minimum thickness:
(i) Phase conductor (mm)

1.0

1.2

Messenger Wire(Bare):
(i) Nom. Cross sectional area (Sq. mm)
(ii) Approx. Tensile Strength (KN)

2.5
7.4

3.5
10.3

Current Rating:
Continuous current carrying
capacity of cable in Air at
Ambient temp. 40ºC (Amp.)

110

Approx. weight (Kg./Km.)

250

330

430

580

Number of Cores:
(i)Power cores
(ii)Neutral cores messenger cores

(No.) : 3
(No.) : 1

De-rating factor
De-rating factors for variation in Air Temp.
Air Temp. (ºC) Rating Factor

30	35	40	45	50	55
1.12	1.06	1.0	0.94	0.88	0.83

(i) Identification of power core :
(ii) Laying :

By providing ridges on the insulation. Three Power cores and one Neutral core shall be suitable twisted around AAAC Messenger.

Detail of the Power / Neutral core :
(i) Conductor:
a) Material
(b) Flexibility class as per IS:8130/84
(c) Form of Conductor
(ii) Insulation:
(a) Material
(b) Colour of Insulation

Aluminium to IS:8130/84
Class – 2
Compacted circular.

High Density Polyethylene to IS: 6474 - 1971 Black

Details of the Messenger wire (Bare)
(i) Material
(ii) Form of Conductor

All Alloy Aluminium Conductor to IS:398(IV).
Standard compacted circular.

Top

FINISHED AERIAL BUNCHED CABLE TESTING

Prior to dispatch, cable is subjected to rigorous testing. Test procedure followed at of works are according to various National & International specification and are covered in this paper.

Following tests are performed on Aerial Bunched Cables:

Test on Phase/Street lighting conductor

TESTS	METHOD OF TESTING
Tensile Test	IS : 10810 pt – 2
Wrapping Test	IS : 10810 pt – 3
Conductor Resistance Test	IS : 10810 pt – 5
Test For thickness of Insulation	IS : 10810 pt – 6
Physical Test for polyethylene Insulation Tensile Strength & Elong. Test Melt flow Index Vicat softening Point Carbon Black Content & dispersion Colour Fastness Environmental stress cracking Bleeding & Blooming Volume Resistively Test	IS : 10810 pt – 7 IS : 10810 pt – 23 IS : 10810 pt – 22 IS : 10810 pt – 32 IS : 10810 pt – 18 IS : 10810 pt – 29 IS : 10810 pt – 19 IS : 10810 pt – 43
High Voltage test including water immersion test.	IS : 1596

Test for messenger conductor:

Breaking load Test	IS : 398 (pt-IV)
Elongation Teat	IS : 398 (pt-IV)
Resistance Test	IS : 398 (pt-IV)

Dimensional test as per the parameters specified in the technical particulars.

Bending test on completed cable shall also as performed. The diameter of mandrel shall be 10(D+d).

Where,
D = Overall diameter of the cable
d = Dia over conductor

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