Angle Monopole Design

CONTENTS

No. Descriptions Page

1. 132kV Overhead Transmission Line System Technical Parameters and Design Data ----------------

2. Sag and Tension Calculations -----------------------------------------------------------------------------

3. Clearance Calculation and Diagram ---------------------------------------------------------------------

4. Load Calculations --------------------------------------------------------------------------------------------

5. Loading Trees -------------------------------------------------------------------------------------------------

6. Design References ------------------------------------------------------------------------------------------

7. Monopole Outline Drawing --------------------------------------------------------------------------------

8. Typical Foundation Details ---------------------------------------------------------------------------------

1. SYSTEM PARAMETERS

1.1 System Nominal Voltage : 132kV

1.2 Number of Circuits & Phases per Circuit : Single Circuit

1.3 Conductors

1.3.1 Type of Conductor : ACSR

1.3.2 Number of Conductor per Phase : 1 No. ACSR

1.3.3 Name of Conductor : Hawk (21.79mm dia.)

1.4 Ground Wire

1.4.1 Type of Ground Wire : 24 Fibers Optical Ground Wire (OPGW)

1.4.2 Number of Ground Wire : 1 No.

1.5 Insulator Type : Composite Line Post Insulator

1.6 Max. Shielding Angle : 30 degrees

2. SUPPORT TECHNICAL PARTICULARS

2.1 Structure Type : Polygonal Tubular Steel Monopole

2.1.1 Steel Monopole Type : Angle Pole "AP30"

2.1.2 Design Line Angle : 30 °

2.1.3 Steel Monopole Body Extension : ± 0.0M, +3.0M, +6.0M and +9.0M

Note : For suspension location with line angle, wind span shall be reduced accordingly to

compute the effect of the line angle.

2.2 Design Spans

2.2.1 Basic Span : 200 m

2.2.2 Max. Wind Span : 220 m

2.2.3 Max. Weight Span : 300 m

2.2.4 Min. Weight span (Suspension) : 10 m of Weight Conductor

3. WEATHER CASES / CLIMATIC CONDITION / CONDUCTOR TENSION LIMITS

3.1 Conductor Temperature

3.1.1 Min. Conductor Temperature : -05 °C

3.1.2 Average Conductor Temperature (EDS) : 25 °C

3.1.3 Max. Conductor Temperature : 80 °C

3.1.4 Assumed Conductor Temperature - Construction : 25 °C

3.1.5 Coincident Temperature of Max. Wind : 25 °C

3.1.6 Conductor Sagging Tension (25°C) : 20 % of UTS

3.2 Design Wind Pressures (as per IEC 60826 : 2003)

: 33.33 m/s (Design of Structures)

: 17.50 m/s (Clearance Check)

: 1.00

: 1.00

: 1.225 kg/m³

:

: 680.42 N/m² (Design of Structures)

187.58 N/m² (Clearance Check)

Combine Wind Factor for Conductor, Gc : 2.25

: 1.00 (Span, L = 200)

Drag coefficient of Conductor, Cxc : 1.00 (IEC 60826)

:

: 1530.94 N/m² (Design of Structures)

: 422.05 N/m² (Clearance Check)

Wind Load on Conductors, Ac :

: 1530.94 N

Drag coefficient of Insulator, Cxi : 1.20 (IEC 60826)

Combine Wind Factor Insulator, Gt : 2.30

:

: 1877.96 N/m²

Wind Load on Insulators, Ai :

: 1877.96 Si N

Where : Si - Projected Area of Insuator.

Wind Load on Support Structure - as per IEC 60826 (Automatically Calculated by the Monopole

Design Software PLS-POLE)

4. DESIGN STRENGTH as per IEC 60826

: 0.05 (Steel Poles)

: 10 (Normal Condition)

: 2 (Exceptional Condition)

: 0.94 (Normal Condition)

: 0.98 (Exceptional Condition)

: 0.92 (Normal Condition)

: 0.92 (Exceptional Condition)

: 0.95 (Good Quality)

: 1.00 (10% exclusion Limit)

Support Design Strength, Rc : 0.82R (Normal Condition)

Reference Wind Speed, VRB

KR for Terrain Category B

Air Density Correction Factor, τ

Air mass per unit volume, µ

Dynamic reference pressure, qo 1/2τµ (KR VRB)² in N/m°

(Hmax = 30m)

Span Factor, GL

Design Wind Pressure on Conductor, qd qo Cxc Gc GL

qd d L Sin² Ω

d L Sin²Ω

Where : L - Structure Wind Span, d - Diameter of Conductor & Ω Angle of Incidence

(Hmax = 30m)

Design Wind Pressure on Insulators, qdi qo Cxi Gt

qdi Si

Strength Coefficient of Variation, Vr

Number of Components N

Strength Factor,ФN

Strength Factor, ФS

Strength Factor due Quality, ФQ

Strength Factor related to Rc, ФC

: 0.86R (Exceptional Condition)

Conductor Sagging Tension (25°C) : 20 % of UTS

5. CLEARANCES

5.1 Min. Ground Clearance at 80°C : 7.00 m

5.2 Min. Conductor Clearance to Earthed Parts in Stil : 1.50 m

5.3 Min. Phase to Phase of Suspension Pole

(Outer to Outer Phase Horizontal Distance) : 3.60 m

6. MATERIAL SPECIFICATIONS

6.1 Monopole Shaft : EN 10027-1 S355JO or Higher Equi.

6.2 Monopole Cross Arm : EN 10027-1 S355JO or Higher Equi.

6.3 Connection Plates : EN 10027-1 S355JO or Higher Equi.

6.4 Others (Non-Structural) : EN 10027-1 S235JO or Higher Equi.

6.5 Anchor Bolts : EN 10027-1 S355JO or Higher Equi.

6.7 Machine Bolts : DIN 267 Grade 6.8 or Higher Equi.

6.8 Nuts : DIN 267 Grade 6 or Higher Equi.

Min. Thickness of Steel Plates for Structural Member : 5 mm

7. GALVANIZING

Monopole parts shall be galvanized according to BS EN ISO 1461, Min. Thickness of 127 microns

8. APPLICABLE DESIGN STANDARDS

8.1 Loadings : IEC 60826 - Design Criteria

For Overhead Transmission Lines

8.2 Monopole Structural Design : ASCE Manual 72 - Design of Steel

Transmission Pole

9. DESIGN SOFTWARES

9.1 Sag and Tension : PLS-CADD Version 10.+

9.2 Load Calculations : Microsoft Excel Sheets

9.3 Monopole Structural Design : PLS-POLE Version 9.+ and

Microsoft Excel Sheets

Where R is the Average Strength Value of the Materials

SAG AND TENSION CALCULATIONS

CLEARANCE CALCULATIONS AND DIAGRAMS

LOAD CALCULATION DATA SHEET

1. Pole Type : AP30

2. Line Angle : 0 - 30 deg

3. Insulator Particulars

3.1 Weight of OPGW Suspension Set : 10 kg (98.1N)

3.2 Type of Insulator : Horizontal Post Insulator

3.2a Weight of Insulator : 70.20 kg (688.7N)

3.2b Length of Insulator : 1753 mm (1.753m)

3.2c Diameter of Insulator : 182 mm (0.182m)

3.2d Wind Pressure of Insulator : 1878

3.2e No of Post Insulator : 1

3.3 Type of Insulator : Tension Insulator

3.3a Weight of Insulator : 70.20 kg (688.7N)

3.3b Length of Insulator : 1753 mm (1.753m)

3.3c Diameter of Insulator : 182 mm (0.182m)

3.3d Wind Pressure of Insulator : 1878

3.3e No of Ten Insulator : 2

4. Wire Particulars

4.1 OPGW : 24 Fibers Optical Ground Wire (OPGW)

4.1a Weight of OPGW : 0.482 kg (4.73N)

4.1b Diameter of OPGW : 11.30 mm (0.0113m)

4.1c Wind Pressure of OPGW : 1531

4.1d No of OPGW : 1

4.2 Conductor : (ACSR)

4.2a Weight of Conductor : 1.015 kg (9.96N)

4.2b Diameter of Conductor : 21.79 mm (0.02179m)

4.2c Wind Pressure of Conductor : 1531

4.2d No of Conductor : 1

5. Span

5.1 Basic Span : 200 m

5.2 Wind Span : 220 m

5.3 Weight Span(Maximum) : 300 m

5.4 Weight Span(Minimum) : 10 m

N/m2

N/m2

N/m2

N/m2

6. Wire Tension

6.1 OPGW tension

6.1a No Wind at 25° C : 8634 N

6.1b High Wind at 25° C : 16255 N

6.1c Over load at 25° C : 10750 N

6.2 OPGW Sag

6.2a No Wind at 25° C : 2.74 m

6.2b High Wind at 25° C : 5.56 m

6.2c Over load at 25° C : 4.14 m

6.3 Conductor

6.3a : 17326 N

6.3b High Wind at 25° C : 34660 N

6.3c Over load at 25° C : 21485 N

6.4 Conductor Sag

6.4a No Wind at 25° C : 2.88 m

6.4b High Wind at 25° C : 5.05 m

6.4c Over load at 25° C : 3.49 m

Miscellaneous

7.1 Lineman & Tools kid : 1500 N

7.2 Anchor Block angle : 30 °

No Wind at 25° C

Project Title : 132kV OHTL Code No.: Pole Type : AP30 PAGE NO:

Design Span (m) : 200 Wind Span (m) : 220

Max Line Angle (Deg.) : 30° Max. Wt. Span (m) : 300

Line Angle (Deg.) : 0°

H.W at 30° H.W at 30° Str. Cond. Str. Cond. Brk. Cond. Brk. Cond.

Max Wt No Wt No wind No wind No wind No wind

T.W Poles T.W Poles Max Dev Min Dev Max Dev Min Dev

VERTICAL LOADS

OPGW

Wt of OPGW = 4.73 x 300 = 1419

Wt of OPGW Sus set = 98.1 = 98

TOTAL (Newton, N) = 1517

Phase Conductor

Wt of Conductor = 9.96 x 300 = 2987

Wt of post Insulator = 688.66 x 1 = 689

Wt of Ten Insulator = 688.66 x 2 = 1377


TRANSVERSAL LOADS

OPGW

Wind Load on OPGW = 1531 x 0.0113 x 220 x Sin ²(30) = 951

Load DueTo Wire Ten = 16255 x Sin ( 15) x 2 x Sin ²(30) = 4207

TOTAL (Newton, N) 5159

Phase Conductor

Wind Load on Conductor = 1531 x 0.02179 x 220 x Sin ²(30) = 1835

Wind Load on Post Insulator = 1878 x 0.182 x 1.753 x 1 = 599

Wind Load on Ten Insulator = 1878 x 0.182 x 1.753 x 2 = 1198



Notes:

Factor of Design Strength for the Support Material is 0.82 (Normal condition)

Wind load on pole shall be calculated and applied as per IEC-60826 by software itself.

LOADING CONDITION (Tick as Applicable)

Loads are calculated for working condition only.








VERTICAL LOADS

OPGW



Phase Conductor




TRANSVERSAL LOADS

OPGW

Wind Load on OPGW = 1531 x 0.0113 x 220 x Sin ²(30) = 951



Phase Conductor

Wind Load on Conductor = 1531 x 0.02179 x 220 x Sin ²(30) = 1835

Wind Load on Post Insulator = 1878 x 0.182 x 1.753 x 1 = 599

Wind Load on Ten Insulator = 1878 x 0.182 x 1.753 x 2 = 1198



Notes:



Wind load on pole shall be calculated and applied as per IEC-60826 by software itself.









VERTICAL LOADS (INTACT)

OPGW

Wt of OPGW = 4.73 x 300 x 1.5 = 2128

Wt of Lineman & tools = 1500 = 1500



Phase Conductor

Wt of Conductor = 9.96 x 300 x 1.5 = 4481





TRANSVERSAL LOADS (INTACT)

OPGW

Load DueTo Wire Ten = 8634 x Sin ( 15) x 2 x 1.5 = 6704


Phase Conductor




Notes:










VERTICAL LOADS (STRINGING)

OPGW

Wt of OPGW = 4.73 x 300 x 2 = 2837



Load DueTo Wire Ten = 8634 x Sin ( 30) x 2 = 8634


Phase Conductor

Wt of Conductor = 9.96 x 300 x 2 = 5974






TRANSVERSAL LOADS(STRINGING)

OPGW

Load DueTo Wire Ten = 8634 x Sin ( 15) x 2 x1.134 = 5068


Phase Conductor



LONGITUDINAL LOADS (STRINGING)

OPGW

Load DueTo Wire Ten = 8634 x Cos ( 15) x 2 x0.866 = 14445


Phase Conductor




Notes:











OPGW

Wt of OPGW = 4.73 x 300 x 1.5 = 2128




Phase Conductor







OPGW



Phase Conductor




Notes:










VERTICAL LOADS (STRINGING)

OPGW

Wt of OPGW = 4.73 x 300 x 2 = 2837





Phase Conductor

Wt of Conductor = 9.96 x 300 x 2 = 5974






TRANSVERSAL LOADS(STRINGING)

OPGW


TOTAL (Newton, N) 0

Phase Conductor


TOTAL (Newton, N) 0

LONGITUDINAL LOADS (STRINGING)

OPGW



Phase Conductor




Notes:











OPGW

Wt of OPGW = 4.73 x 300 = 1419



Phase Conductor






OPGW



Phase Conductor




Notes:










VERTICAL LOADS (BROKEN)

OPGW

Wt of OPGW = 4.73 x 300 x 0.7 = 993



Phase Conductor





TRANSVERSAL LOADS (BROKEN)

OPGW



Phase Conductor



LONGITUDINAL LOADS (BROKEN)

OPGW

Load DueTo Wire Ten = 8634 x Cos (15) x 1 = 8340



Phase Conductor

Load DueTo Wire Ten = 17326 x Cos ( 15) x 1 = 16736


Notes:











OPGW

Wt of OPGW = 4.73 x 300 = 1419



Phase Conductor






OPGW



Phase Conductor




Notes:










VERTICAL LOADS (BROKEN)

OPGW

Wt of OPGW = 4.73 x 300 x 0.7 = 993



Phase Conductor





TRANSVERSAL LOADS (BROKEN)

OPGW



Phase Conductor




LONGITUDINAL LOADS (BROKEN)

OPGW

Load DueTo Wire Ten = 8634 x Cos (0) x 1 = 8634


Phase Conductor

Load DueTo Wire Ten = 17326 x Cos ( 0) x 1 = 17326


Notes:



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Angle Monopole Design