Proven Solutions to Specific Maintenance Problems in Electrical Distribution

1. Proven Solutions to Specific Maintenance Problems in Electrical Distribution

2. European HQ , Harrogate , UK North American HQ , Miami , USA Asia-Pacific HQ , Sriracha, Thailand Chinese HQ , Hong Kong Canada HQ , Toronto, Canada

3. Belzona International Distributors • Over 140 Belzona Distributors • Worldwide • Belzona Represented in more • than 120 Countries Servicing Your Needs • Fully Trained Consultants • Approved Contractors • Customer Training • On Site Supervision • 24 Hours a Day • 7 Days a Week

4. Belzona Product Range

5. Belzona can provide solutions to common problems found in Substations including: Transformer Leaks Insulator Damage SF6 leaks Facilities Maintenance

6. Transformer Leaks Due To : • Water contamination • Internal and external corrosion • Impact and abrasion damage • Coating Breakdown Conventional Solutions Clamps- Costly and not always available for geometry Welding - Hot work / draining issues – not online repair Conventional putty - Poor adhesion & compressive strength

7. Leaking Transformer Fins Company Wind Farm, UK Problem Lower edge of fins on oil filled transformer corroded and starting to leak. Problem caused by sheep rubbing against fins, damaging paint system. Application Details Application was carried out in accordance with Belzona Know-How System Leaflet TCC-1. Pre-formed doubler plates were bonded over the corroded areas after manual surface preparation

8. Leaking Transformer Flanges Company Power Plant, West Tennessee USA Problem Leaking flanges created an environmental hazard and the transformer could not be drained for repair. Application Details The application was carried out using a modified Belzona Know-How System Leaflet GSS-4, temporarily stopping the leak with Belzona1831 before encapsulating the flange with a Belzona2000 series elastomer.

9. Leaking Transformer Fins Company National Grid, UK Problem Oil Leaks at bolted flanges resulting in contamination and slip hazards Application Details Application was carried out in accordance with Belzona Know-How System Leaflet VPF-11a. All works were carried out without the need to drain down the transformer

10. Featured Product Product Belzona 1831 Features Optimised for adhesion to less than optimally prepared surfaces, displaces oil and water Benefits Reduced need for optimal preparation of surfaces, allowing easier and effective repairs in-situ. No necessity to drain down equipment prior to repair.

11. Belzona Solutions for Transformer Oil Leaks • No hot work required • On-line repair - no need to drain • No galvanic effects • High adhesion to a huge range of materials • Surface tolerant • High compressive strength • No shrinkage • Simple and safe to use • Environmentally friendly • Rapid turnaround • Turnkey Solution A Cost Effective Alternative Solution to Sealing Leaking Transformers

12. SF6 Leaks Due To : • Water contamination • Internal and external corrosion • Aging of gaskets • UV Deterioration of mastics Conventional Solutions New gasketing- Shutdown of equipment required Mastic Sealant- Ineffective and short term Conventional putty - Poor adhesion & compressive strength

13. Leaking Switchgear Flanges Company Electric Distributor, Australia Problem SF6 leaking through flanges due to failure of original mastic sealant Application Details Following removal of the failed system by grit blasting, a Belzona 1000 series system was used to seal the flange joint. Leak detection proved success of the repair and resulted in a further 515 flanges being sealed.

14. SF6 Leaks through Flanges Company Hydroelectric facility, BC Canada Problem Leaking joints were resulting in regular refilling of the SF6 gas. Application Details Application was carried out in accordance with Belzona Know-How System Leaflet GSS-4. Injection methods were used to force the Belzona 2000 series Elastomer between the flanges. The repair has been in service for over 10 years and numerous repairs have been done.

15. SF6 Leaks on Circuit Breakers Company Power Company, UK Problem SF6 leaks at porcelain insulator bush seal to circuit breaker Application Details After completion of surface preparation to both the aluminium and porcelain the junction was sealed using the fast curing Belzona 2311 system.

16. Featured Product Product Belzona 2211 MP-Hi-Build Elastomer Features Elongation under ASTM D412 is typically 700% and in addition Belzona 2211 has excellent adhesion Benefits Being optimised for flexibility to bridge moving surfaces whilst maintaining high adhesion allows the system to absorb small movements of flanges etc without loss of sealing

17. Belzona Solutions for SF6 Leaks • No requirement for Depressurisation • High adhesion to a huge range of materials • Surface tolerant • Flexible • High compressive strength • No shrinkage • Simple and safe to use • Environmentally friendly • Rapid turnaround • Turnkey Solution A Cost Effective Alternative Solution to Sealing Leaking SF6 gas

18. Porcelain Insulator Damage Due To : • Rough Handling • Impact Damage • Vandalism • Flashover Conventional Solutions Replacement- Lead Time Issues Conventional putty - Poor adhesion

19. Repair of Broken Insulators Company Power Distribution company, France Problem Damage to insulator preventing safe performance Application Details Moulds were made for the Insulators using Belzona 2200 series Elastomers, before casting and bonding the new profile using Belzona 8111

20. Damage to Insulator Bushings Company Power Station, Egypt Problem The insulators had been cracked and broken and were not functioning correctly Application Details The application was carried out in accordance with a modified version of Belzona VPF-1 & -2. Original profiles were restored with a Belzona 1100 series system and a smooth top surface created using Belzona Ceramic Coatings

21. Belzona Solutions for Porcelain Insulators • No hot work required • In-situ repairs • High adhesion • Surface tolerant • High dielectric strength • High compressive strength • Water shedding • Simple and safe to use • Environmentally friendly • Rapid turnaround • Turnkey Solution A Cost Effective Alternative Solution to Repairing Damaged Insulators

22. Facilities Maintenance Problems Due To : • Leaking Roofs • Concrete Damage • Slips, Trips and Falls Conventional Solutions Tarpaulin- Temporary solution Re-Roofing- Lead Time and Disruption issues Concrete repairs- Cannot be feather edged, lengthy repair

23. Spalled Concrete Company Power Station, UK Problem Severe spalling of the electricity pylon concrete support columns accelerated by the acidic atmosphere generated by local industries Application Details Belzona 4000 series lightweight repair material used to rebuild the damage without the use of shuttering

24. Roofing leaks Company Nuclear Power Plant, Maryland USA Problem Roof leaks exacerbated by multiple roof penetrations and failure of existing roofing protection Application Details Application was carried out in accordance with Belzona Know-How System Leaflet RPA-1.

25. Slip Problems Company Power Station, UK Problem Slippage on steps when wet causing health and safety concerns Application Details Belzona 4000 series grip system applied to provide positive grip in wet, icy and oily environments improving safety

26. Belzona Solutions for Facilities Maintenance • No hot work required • In-situ repairs • High adhesion • Surface tolerant • Local or Full Repairs possible • Immediate Leak Sealing • Emergency and Long Term repairs possible • Simple and safe to use • Environmentally friendly • Rapid turnaround • Turnkey Solution A Cost Effective Alternative Solution to Facilities Maintenance Problems

27. Belzona provides these solutions to many International Organisations: Transformer Leak Sealing SF6 Gas Leak sealing in electrical switchgear Insulator Repairs Facilities Maintenance

28. Belzona systems will solve hundreds of maintenance problems including: Shaft Repairs Live Leak Sealing Generator Repairs How Can Belzona Help You? Expansion Joints Frost and Corrosion Damage Containment Areas Valley Gutters Equipment Housing Roofing Protection