Sediver composite insulators for railway applications

Sediver is a key partner in all insulation applications with more than 2 million insulators operating today on numerous Railway networks with different applications and voltages such as

  • 15 kV and 25 kV on AC systems and
  • from 0.75 kV to 3 kV on DC systems

Since 1955, Sediver has been a supplier of catenary insulators to many railway companies. As a proof of good performance and reliable partnership, Sediver has been selected and qualified by S.N.C.F (France) as a supplier for the TGV – the French High Speed railway - which imposes very stringent safety criteria and reliability requirements.

Sediver composite 1.5 kV DC and 25 kV AC – SNCF, France

Sediver main composite insulator railway references

for High speed lines

for traditional lines


France - South East TGV line

Belgium - SNCB


Denmark - DSB


Egypt - Metro of Cairo


France - Atlantic TGV line

France - SNCF


Italy - RFI


Luxembourg - CFL


France - North TGV line

Morocco - ONCF


Norway - NSB


Portugal - CP


Korea - Seoul Pussan High speed track

Turkey - TCDD


United Kingdom - LCR


United Kingdom - Eurotunnel line 1



Sediver product range

Sediver composite insulators consist of a fiberglass rod protected by EPDM or Silicone rubber and assembled with metal fittings.
Through a highly developed design and carefully selected materials, Sediver insulators assure the safest usage which in turn reduces the cost of inspection and maintenance.

Sediver studies and adapts its insulators and end fittings to the specifications of every railway company and project:

- Feeder insulators

Sediver composite railway insulators for SNCF, France

- Top and strut tube insulators

Sediver composite railway insulators for Amtrak, USA

Sediver composite insulators can be installed safely in tunnels since both the EPDM and Silicone materials used by Sediver have self-extinguishing properties: when a flame is applied, they burn without producing any toxic fumes and extinguish as soon as the flame is removed.