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  HV Electricity Overhead Distribution Line: Project Approval Tn Tension Values ​​and Sag Table of Conductors Calculated Depending on the ar at Various Temperatures have been Calculated.

(Sag table Calculation-State Change Equation)

HV ELECTRICITY OVERHEAD DISTRIBUTION LINE

STATE CHANGE EQUATION

Fieldwork Conductor Sag Tension

Project Conductor Sag Table
 State Change Equation(Tn,aort,Pr,Pb,0C) 

Calculation of ag, aw, ar angle Table

Up Lift Control

Section 4

BÖLÜM 2
Kısım 1
Kısım 2
Kısım 3
Kısım 4

BÖLÜM 3
Kısım 1
Kısım 2
Kısım 3
Kısım 4
Kısım 5

BÖLÜM 4
Kısım 1
Kısım 2
Kısım 3
Kısım 4
Kısım 5
Kısım 6

 

 Pole Type : Steel     Concrete           
 Ice Load Zone     Pole Span Length (m)  
 t1 Temparature (0C)    t2 Temparature (0C)  
 H1 Tension (kg)    H2 Tension (kg)  282
 A Cross-Section (mm2)    A Cross-Section (mm2)  
 S Ruling Span Length ar(m)    S Span Length ar(m)  
 W1 Conductor  Weight (kg/m)    W2 Conductor  Weight  (kg/m)  0,3429  
 E Final Modulus of Elasticity Es (kg/mm2)    (İlk-Son) Final Modulus of Elasticity Ei (kg/mm2)  
 α Coefficient of Thermal Expansion β (1/0C)    α Coefficient of Thermal Expansion   β (1/0C)  

* Here, Sag Table (Tension Calculation) calculations are made in OHL projects.

*After the project is selected as Iron or Concrete pole, the Ice Load Zone is selected.

*The ar value calculated between the poles for which Tension will be calculated is entered in the 1st part of the table.

*The distance between the two poles for which the Sag will be calculated is entered in the second part of the table, in the Pole Span section.

*The ar calculation can be checked by entering the pole distances between the two stopper poles in Table 1.

*Table 2 shows the Tension and Sag values ​​calculated depending on the ar between two poles. The accuracy of the values ​​in the project is checked.

                                                                       Conductor State Change Equation

                                       

                                                                            Ruling Span ar

                                                      

            

S1 S2 S3 S4 S5 S6 S7 S8

ar
                 236,55

                                                             Tablo 1

 

 Ruling Span ar=350 m
Temparature 0C -5 0 +5 +10 +15 +20 +25 +30 +35 +40 +45 +50
Tension (kg)  282  280,27  278,57  276,91  275,27  273,66  272,07  270,52  268,99  267,48  266  264,55
Pole Span= 350 m
Sag (m)   18,62  18,73  18,85  18,96  19,07  19,19  19,3  19,41  19,52  19,63  19,74  19,85

                                                             Tablo 2