DOWNLOADS


Sediver composite line post insulators


Line posts are the ideal solution for compact line applications in urban areas.

They are also ideal for upgrading the capacity of existing lines with a narrow right of way – by increasing the voltage or the number of circuits.

Furthermore they have a reduced visual impact and are well-suited to innovative tower and pole designs.

Key advantages :


Reduced conductor movement

Reduced phase to phase spacing = compact line

Low visual impact

Less radio noise

No risk of puncture

Adapted to steel, wood and concrete poles

Good pollution performance


Sediver offers full range of products:

Sediver composite Line post drawing  
Sediver composite Braced Line Post drawing
 
Sediver composite Pivoting horizontal line post drawing
  Sediver composite Pivoting Horizontal Vee drawing
Line post
 
Braced line post
 
Pivoting horizontal Vee
 
Pivoting horizontal Vee
with boomerang
   

The brace increases the vertical load capacity of the line post assembly.

 

The pivoting base prevents bending of the post insulators, thereby increasing its axial compression load capacity and minimize torsion loads on the support structure.

 

The mechanical performance of the pivoting horizontal vee can be further enhanced by the application of a boomerang type fitting at the line end.

             

Custom made covering material:

Sediver is the only manufacturer able to supply the entire product range of suspension and post insulators in two different covering materials:

Silicone rubber which provides excellent hydrophobic and recovery characteristics that limit leakage current and prevents arcing even in very heavy polluted and seacoast environments.

EPDM rubber which has been specially formulated to provide optimum weathering and electrical properties for all operating conditions. It has proven its efficiency over a wide range of climates, contamination levels and line voltages since 1975.

While our EPDM is proprietary to Sediver, both housing materials have been specially formulated to provide an optimum combination of electrical, weathering and durability properties.


Mechanical range:

up to 15 kN.m (132 kip.in)


Series

Nominal core diameter
(mm/in)

20

44
1.75"

30

63
2.5"

35

76
3.0"

40

88
3.5"


Grading rings

At higher operating voltages, grading rings are necessary to reduce the voltage gradient on and within the insulators, and to reduce radio noise to acceptable levels. The Sediver recommendations for composite suspension insulators used in non-contaminated and low altitude (< 1000 m) areas are:


Line
voltage

Recommendations

2.5" serie 30

3.0" & 3.5" series 35 & 40

Line end

Tower end

Line end

Tower end

230 kV

x

No ring

No ring

No ring

345 kV

x

No ring

x

No ring

500 kV

x

x

x

x

Grading ring: 15.4" (390 mm) diameter   Grading ring: 15.4" (390 mm) diameter

Grading ring: 15.4" (390 mm) diameter