Sealing Cables | Windfarm & Substation Cable Sealing using CSD Systems
Published 13 Feb 2025
NOFIRNO | Sealing Cable Ducts | Offshore & Onshore Windfarms
Nofirno Duct Seal System
CSD Technical Services have been involved in a key renewable energy project since 2020, whereby they have been specified for duct seal entries across a huge onshore substation site. The sealing of three additional 250mm cable entries, each containing a 1x120mm cable, was requested by the client. As with other areas of the site, the NOFIRNO Duct Seal System, manufactured by CSD Sealing Systems, was used to provide a water and gastight seal.
Sealing Challenges
There were no major challenges encountered as the NOFIRNO Duct Seal System is the ideal solution for vertical ducts. This is due to the fact the insert sleeves cling to the cables and ducting without sliding down and falling out of the penetration. The high adhesion and viscosity of the NOFIRNO Sealant means it will also not run down the duct when applied.
Outcome Using NOFIRNOÂ
The NOFIRNO multi-sleeves were installed to provide cable separation and a firm backing for the NOFIRNO Sealant layer. The cable entries which were exposed to the elements are now watertight.
Water and gastight sealing protection of cable duct and building entry points.
NOFIRNO Sealant
The NOFIRNO Duct Seal System comprises of two components; 60mm rubber NOFIRNO multi-sleeves which provide cable support, ensure cable separation, and provide a backing for the second component which is a 20mm layer of NOFIRNO Sealant. To ensure the NOFIRNO Sealant adheres correctly, the areas in where the sealant is to be applied should be clean and dry before application i.e., the cables and any frames and structures.
The NOFIRNO multi-sleeves are then installed providing cable separation and a firm backing for the NOFIRNO Sealant layer. The system will provide a water and gastight seal to certified levels of 2.5 bar and has been shown to provide protection for a period of at least 50 years.
Key Benefits of Sealing Cables
• Tested to prove no deterioration in performance for more than 50 years
• Provides flood protection and prevents water and gas ingress – pressure rated up to 2.5 from the front and back of the seal
• Quick and easy to install to install
• Easy re-entry for adding, removing or replacing cables
Offshore Windfarm | Onshore Substation | Cable Sealing Solutions
Further ReadingÂ
- 66kV 72.5kV | Power Cables Accessories for Offshore Windfarms
- Supplying Cable Termination, Jointing, Pull-in & Electrical Equipment up to 66kV
- CSD Marine Grade Cable Transit Sealing System Supplied Onboard Kintra II Passenger Vessel
More Case StudiesÂ
- Sealing HV Cables | A Battery Energy Storage Systems (BESS) Case Study
- Sealing Cables | 400kV Substation Cable Sealing using CSD Systems
- Sealing Cables | Windfarm & Substation Cable Sealing using CSD Systems
Specialist Distributors to the UK and international Offshore Wind & Renewable industry to provide safe and reliable LV HV Electrical Cable & Power Distribution Systems up to 66kV – we are highly customer responsive and absolutely committed to providing a world-class service. Contact our UK Power Team for competitive quotations, fast delivery from stock and technical support or training on all LV-HV products.
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