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Calculation of Crippling (Ultimate Transverse ) Load on PoleCalculation Spacing of Between Aluminium Conductor (IS:5613 Part-1)
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Wind Pressure100Kg/m2Maximum SpanMeter
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Type of PoleRCC PoleWorking VoltageKV
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Total Height of Pole10MeterSpacing Between Two Conductormm
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Class of Pole ( If Known)Not in List675
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Height of Pole in Ground1.5Meter
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Height of Pole above Ground9MeterVoltage Selection according to Load & Distance
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Conductor Mounting from Top of The Pole0.5Meter
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No of Conductors on Pole1NosTotal Load8000Kva
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Line Span25MeterPower Factor0.8
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Size of Conductor60mmTotal Distance1.6Km
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Factor of Safety2.52.5Required Voltage for This Load44.34Kv
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Pole Section on Top (Length X Width )mm127150
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Pole Section on Bottom (Length X Width )mm400150
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Minimum Ultimate Transverse Load for 10 Meter Pole at 0.5 Meter If Your Know otherwise Leave Blank675KgJignesh.Parmar
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CALCULATIONSjiguparmar@yahoo.com
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Wind Load on Conductor/Span100.00Kgwww.electricalnotes.wordpress.com
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Total Bending Movement at Ground Level due to Wind Load on All Conductor800.00Kg.Meter
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Equivalent Safe Working Load at said Meter from TOP of The Pole corresponding to Wind Load on All Conductors100.00Kg
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Wind Load on Pole Surface above Ground Level233.75Kg
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Centre of Gravity of Tapering rectangular section of Pole4.98Meter
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Bending Movement at Ground Level due to Wind Load on Pole1164.98Kg.Meter
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Equivalent Safe Working Load at said meter from Top of The Pole corresponding to Wind Load on Pole145.62Kg
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Total Tansverse Load at said meter from Top of The Pole (Due to wind Load on Conductors + Wind Load on Pole Surface)245.62Kg
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Total Transverse Load (Crippling Load) Capacity of Pole614.00Kg
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Selection of Pole O.K
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N.B: Calculation as per "Design of Electrical Installation" by V.K.Jain & Amitabh Bajaj
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3Factor of SafetySpan
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1Wooden Pole3.550
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2RCC Pole2.5100
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3PCC Pole2.5100
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4Steel Tubler Pole280
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5Rail/RSJ Pole280
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6Struts (Steel Pole)2.580
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7Struts (RCC/PCC)380
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8PCC Pole for 33 KV280
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2Class of PoleMax.Length of Pole (M)Min.Ultimate Transverse Load from 0.6meter from Top(Kg)
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17 Meter (Class-1)173000
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17 Meter (Class-2)172300
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17 Meter (Class-3)172000
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17 Meter (Class-4)171400
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16 Meter (Class-5)161100
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12.5 Meter (Class-6)12.51000
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12 Meter (Class-7)12800
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11 Meter (Class-8)11700
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11 Meter (Class-9)11500
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9 Meter (Class-10)9300
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7.5 Meter7.5200
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Not in List50010
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173000
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172300
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172000
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171400
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161100
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151050
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141050
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131000
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12800
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11600
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10500
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9300
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8200
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7200
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6200
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5150
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4150
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3150
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