PERMISSIBLE SPANS



 

MAXIMUM PERMISSIBLE SPANS         IN METERS)

 FOR TYPICAL LINES

Sl. No.

Particular

75 Kg/M2 Wind Pressure

100 Kg/M2 Wind Pressure

A)

33 KV Lines over 9.1 M PSCC poles with Dog/ Raccon ACSR Conductor

75

75

    B)

i)

11 KV lines over 8.0 M.PSCC Poles with ACSR Conductor
  a) Rabbir (7/3.35)
  b) Weasel (7/2.59)
  c) Squirrel (7/2.11)

65
80
100

70
90
90

(ii)

6.3 KV Single phase line Over :

       

8.0 M.PSCC poles with ACSR

       

Conductor (HVVD System)

       

  a) Weasel (7/2.59)

110

110

 

 b) Squirrel (7/2.11)

110

110

(iii)

LT.3 ph wire (vertical formation) :

         

lines over 8.0 M.PSCC

         

poles with ACSR Conductor

         

 a) 3 x Rabbit + 2 x Squirrel

54.5

67

 

 b) 3 x Weasel + 2 x Squirrel

65.5

67

 

 c) 5 x Squirrel

67

45

(iv)

L.T. 3 ph 4 wire line :

         

 a) Rabbit (7/3.35)

62.5

66.5

 

 b) Weasel (7/2.59)

77.5

82.5

 

 c) Squirrel (7/2.11)

91

100

(v)

L.T.S ph 3 wire line :

       

 a) Weasel (7/2.59)

67

67

 

 b) Squirrel (7/2.11)

67

67

(vi)

L.T.S ph 2 wire line :

       

 a) Squirrel (7/2.11)

67

67

 

 b) Squirrel (Ciry)

45

45

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