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Sediver composite suspension insulators for HV applications


The dependability of Sediver composite suspension insulators over the last 35 years is demonstrated by the continuing excellent performance of 5 million insulators in service worldwide.
Sediver offers appropriate solutions for insulators operating in all kinds of environments at voltages up to
765 kV.


Custom made covering materials:

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.


Optimized profiles

Sediver range of products offers 3 different shed profiles, giving optimized leakage distance and profile to cater for all pollution conditions. Their alternating sheds prevent water cascading in heavy rain.


 

XF

XM

XL

 
Sediver XF composite profile
Sediver XM composite profile
Sediver XL composite profile

Profile

Compact

Standard

Long leakage

Leakage distance
mm/kV

16-20

20-25

30-35


Mechanical range: from 40 kN up to 600 kN


Fiber glass rod


Acid resistant fiber glass rod is commonly used.

Epoxy fiber glass rod is also available as per customer's specification.


Grading rings


At higher operating voltages, grading rings are necessary to reduce the voltage gradient on and within insulators, and to reduce radio noise to acceptable levels.

Sediver composite suspension insulators are equipped with grading rings as follows:


Line
voltage

Clean Areas

Polluted Areas

Line end

Tower end

Line end

Tower end

145 kV and below

No ring

No ring

No ring

No ring

170 / 220 kV

x

No ring

x

No ring

275 / 300 kV

x

No ring

x

No ring

400 / 765 kV

x

x

x

x


All Sediver insulators are in full conformity with IEC 61109, IEC 61466-1 and ANSI C29.11.