Calculation of Crippling (Ultimate Transverse ) Load on Pole

Wind Pressure 100Type of Pole RCC Pole

Total Height of Pole 10Class of Pole ( If Known) Not in ListHeight of Pole in Ground 1.5Height of Pole above Ground 8.5Conductor Mounting from Top of The Pole 0.5No of Conductors on Pole 1Line Span 25Size of Conductor 60Factor of Safety 2.5Pole Section on Top (Length X Width )mm 127Pole Section on Bottom (Length X Width )mm 400Minimum Ultimate Transverse Load for 10 Meter Pole at 0.5 Meter If Your Know otherwise Leave Blank 675

CALCULATIONSWind Load on Conductor/Span 100.00Total Bending Movement at Ground Level due to Wind Load on All Conductor 800.00

100.00

Wind Load on Pole Surface above Ground Level 233.75Centre of Gravity of Tapering rectangular section of Pole 4.98Bending Movement at Ground Level due to Wind Load on Pole 1164.98

145.62

245.62

Total Transverse Load (Crippling Load) Capacity of Pole 614.00Selection of Pole O.K

N.B: Calculation as per "Design of Electrical Installation" by V.K.Jain & Amitabh Bajaj

Equivalent Safe Working Load at said Meter from TOP of The Pole corresponding to Wind Load on All Conductors

Equivalent Safe Working Load at said meter from Top of The Pole corresponding to Wind Load on Pole

Total Tansverse Load at said meter from Top of The Pole (Due to wind Load on Conductors + Wind Load on Pole Surface)

Designed By: Jignesh.Parmar www.electricalnotes.wordpress.com

Calculation of Crippling (Ultimate Transverse ) Load on Pole Calculation Spacing of Between Aluminium Conductor (IS:5613 Part-1)

Kg/m2 Maximum Span Meter

Working Voltage KV

Meter Spacing Between Two Conductor mm

MeterMeter Voltage Selection according to Load & Distance

MeterNos Total Load 8000 Kva

Meter Power Factor 0.8mm Total Distance 1.6 Km2.5 Required Voltage for This Load 44.34 Kv

150150Kg

CALCULATIONSKg

Kg.Meter

Kg

KgMeter

Kg.Meter

Kg

Kg

Kg

675

3 Factor of Safety1 Wooden Pole2 RCC Pole3 PCC Pole4 Steel Tubler Pole5 Rail/RSJ Pole6 Struts (Steel Pole)7 Struts (RCC/PCC)8 PCC Pole for 33 KV

2 Class of Pole Max.Length of Pole (M)

17 Meter (Class-1) 1717 Meter (Class-2) 1717 Meter (Class-3) 1717 Meter (Class-4) 1716 Meter (Class-5) 16

12.5 Meter (Class-6) 12.512 Meter (Class-7) 1211 Meter (Class-8) 1111 Meter (Class-9) 119 Meter (Class-10) 9

7.5 Meter 7.5Not in List

17171717161514131211109876543

Factor of Safety Span3.5 502.5 1002.5 100

2 802 80

2.5 803 802 80

300023002000140011001000

800700500300200500 10

30002300200014001100105010501000

800600500300200200200150150150

Min.Ultimate Transverse Load from 0.6meter from Top(Kg)