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Calculations Sag Tension Line

The document provides details on calculating sag and tension for a conductor called ACSR Moose under different temperature, wind pressure, and ice thickness conditions. It gives the properties of the conductor and describes 6 cases of sag-tension calculations at various temperatures ranging from -15 to 85 degrees Celsius, with wind pressures from 0 to 100% and ice thicknesses of 0 to 15mm. For each case it shows the calculated final tension on the conductor and the resulting sag.

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725 views5 pages

Calculations Sag Tension Line

The document provides details on calculating sag and tension for a conductor called ACSR Moose under different temperature, wind pressure, and ice thickness conditions. It gives the properties of the conductor and describes 6 cases of sag-tension calculations at various temperatures ranging from -15 to 85 degrees Celsius, with wind pressures from 0 to 100% and ice thicknesses of 0 to 15mm. For each case it shows the calculated final tension on the conductor and the resulting sag.

Uploaded by

ANAND
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLSX, PDF, TXT or read online on Scribd
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An example of Sag-Tension calculation of conductor.

Conductor Properties

Conductor code ACSR Moose


UTS (kg) 16428
Area of Conductor (sqmm) 597 0.000597 sqm
Weight of conductor (kg/m) 2.004
Diameter of conductor (mm) 31.77
Modulus of Elasticity (kg/sqmm) 7034 7.03E+09 (kg/sqm)
Coefficient of linear expansion (per deg. cel.) 0.0000193

Data of Line

Normal Span (m) 400


Wind pressure on conductor (kg/sqm) 112.49

Initial Conditions

Conductor temp. t1 (deg. Cel.) 22


Ice thickness (mm) 0
Wind pressure on conductor (kg/sqm) 0
Tension (kg) 3614.16
Stress (f1) 6053869.3467
Case 1: sag at -5 deg. Cel. With ice thickness 15mm at no wind conditions

Ice load (kg/m) 2.144413503


Wind Load (kg/m) 0
t 15 mm
t2 -5 deg cel

W1 2.004
W2 4.14841

Therefore coefficient of f23 a 1.36E-06


coefficient of f22 b 6.41220
coefficient of f21 c 0
coefficient of f20 d 3.09E+15

f2 y
11737352.13 0.00E+00

therefore, the final tension


T2 7007.20 kg
Sag 11.84 m

Case 2: Sag at -15 deg. Cel. Without ice and wind conditions

Ice load (kg/m) 0


Wind Load (kg/m) 0
t 0 mm
t2 -15 deg. Cel.

W1 2.004
W2 2.004

Therefore coefficient of f23 a 1.36E-06


coefficient of f22 b 4.56
coefficient of f21 c 0
coefficient of f20 d 7.2E+14

f2 y
7110444.653 0.00E+00

therefore, the final tension


T2 4244.935458 kg
Sag 9.44183967 m

Case 3: Sag at 0 deg. Cel. Full wind Without ice conditions

Ice load (kg/m) 0


Wind Load (kg/m) 3.5738073
t 0 mm
t2 0 deg. Cel.

W1 2.004
W2 4.097330182

Therefore coefficient of f23 a 1.36E-06


coefficient of f22 b 7.3386022
coefficient of f21 c 0
coefficient of f20 d 3.0146E+15

f2 y
11455364.47 0.00E+00

therefore, the final tension


T2 6838.852591 kg
Sag 5.860632243 m

Case 4: Sag at -5 deg. Cel. With 28% wind & 15mm ice conditions

Ice load (kg/m) 2.144413503


Wind Load (kg/m) 1.945582044
t 15 mm
t2 -5 deg. Cel.

W1 2.004
W2 4.581989097

Therefore coefficient of f23 a 1.36E-06


coefficient of f22 b 6.41220
coefficient of f21 c 0
coefficient of f20 d 3.7700E+15

f2 y
12626894.24 0.00E+00

therefore, the final tension


T2 7538.255858 kg
Sag 11.00629531 m

Case 5: Sag at 85 deg. Cel. Without wind & without ice conditions

Ice load (kg/m) 0


Wind Load (kg/m) 0
t 0 mm
t2 85 deg. Cel.
W1 2.004
W2 2.004

Therefore coefficient of f23 a 1.36E-06


coefficient of f22 b 23.08740
coefficient of f21 c 0
coefficient of f20 d 7.2115E+14

f2 y
4919226.162 0.00E+00

therefore, the final tension


T2 2936.778019 kg
Sag 13.64760964 m

Case 6: Sag at -5 deg. Cel. With 28% wind without ice conditions

Ice load (kg/m) 0


Wind Load (kg/m) 1.000666044
t 0 mm
t2 -5 deg. Cel.

W1 2.004
W2 2.239944

Therefore coefficient of f23 a 1.36E-06


coefficient of f22 b 6.41220
coefficient of f21 c 0
coefficient of f20 d 9.0096E+14

f2 y
7389892.754 0.0000E+00

therefore, the final tension


T2 4411.765974 kg
Sag 9.084797388 m
Output Table

Case No. Temp Wind Pressure Ice Resultant Resultant


(Deg.Cel.) (% full wind) Thickness Tension Sag
(mm) (kg) (m)

Initial 22 0 0 3614.16 11.0897


1 -5 0 15 7007.20 11.8404
2 -15 0 0 4244.9355 9.4418
3 0 100 0 6838.8526 5.8606
4 -5 28 15 7538.2559 11.0063
5 85 0 0 2936.778 13.6476
6 -5 28 0 4411.766 9.0848

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