Flexible Cable Seals for Gas Insulated Substations

Published 30 Jun 2021

Flexible Cable Seals

“Roxtec experts responded quickly, and we saved a lot of time”

The Kotlovka 220/20 kV substation in Moscow, Russia needed fire-rated, gas-tight, and removable seals for the cables coming up through the floor to the GIS room.

Roxtec created a solution covering all these requirements.

As the sealing solution is quite demanding, Roxtec provided extra technical support to the staff of the installation company.

Roxtec representatives held installation training and performed onsite control in order to make sure that everyone involved in the project was fully satisfied.

Project facts

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Cable Sealing Using Roxtec

Roxtec cable seals are used in cable vaults, duct banks, electrical substations, trenches and M&E building services protecting low, medium and high voltage power systems against numerous external risk factors:

• Fire – A60, H120 Class bulkhead sealing for offshore classification against jet-fire or spray and prevention of suffocating smoke spread
• Gas – ensure complete tightness against air and gas pressure or migration through cable ducts with DSEAR compliance
• Water – prevent flood and water penetration into substations and buildings – avoid humidity and partial discharge conditions
• Cables – withstand cable bending load in heavy power and high voltage cable seal applications
• Pressure – protect against catastrophic sudden or constant pressure
• Electrical – protect cables and electrical infrastructure against EMI, EMP and lightning strike effects
• Particles – control levels of of dirt, dust, chemical and fumigants from entering buildings, cable ducts and substations
• Blast – protect against vibration, shock-waves and the risk of explosion in industrial and hazardous area locations

Cable Transits – Sealing Cables & Pipes

Cable Transits

Roxtec cable transits are used to prevent water, gas, fire, dust and rodents from entering cable duct openings and potentially causing damage to cables and other electrical infrastructure.

Cable transit systems can be designed for sealing medium/high voltage substations including 11kV/33kV and “triplex” type cables in single, multiple or trefoil configuration.

Roxtec modular cable transit seals are based upon a rubber design with seals that are constructed of a number of removable layers to secure a watertight, gas tight and fire proof seal around the cable or pipe – the range includes rectangular transits and round transits to fit a variety of pipes and cable sizes.

Cable transit products ensure safety, reliability and efficiency by providing an effective, dependable seal around cables and pipes through an opening, penetration or duct.

LV MV HV Jointing, Earthing, Substation & Electrical Eqpt

Key Product Categories: Duct Seals | Cable Cleats | Cable Glands | Electrical Safety | Arc Flash Protection | Cable Jointing Tools | Cable Pulling | Earthing | Feeder Pillars | Cable Joints LV | Joints & Terminations MV