Hafeez, Shakir

General Manager & Head of Transmission Lines, National Engineering Services, Pakistan

Hafeez, Shakir

General Manager & Head of Transmission Lines, National Engineering Services, Pakistan

Biography

Selecting Optimal Outdoor Insulation Under Heavily Polluted Conditions

Mr. Hafeez obtained his BSc & MSc in Electrical Engineering at the University of Technology & Engineering in Lahore and over his career has had extensive experience in design and control of HV and EHV transmission line projects. He has supervised project planning and scheduling, including conceptual design, cost estimation and design of transmission lines and is an expert in preparing bid documents outlining drawing of towers, insulators, line hardware and accessories. His industry experience also includes inspection and type testing of transmission line material to ensure compliance with specifications. He is also responsible for conductor optimization and insulation coordination under applicable climatic conditions as well as isokeraunic and pollution levels.

The EHV transmission network in Pakistan faces exceptionally harsh service conditions and frequent pollution flashovers. In addition, due a long coastline and heavy industry, there is severe onset of corrosion affecting both towers and galvanized cap & pin insulators. This presentation describes countermeasures based on application of a silicone rubber coating to existing fog type insulators to prevent these problems and as an alternative to costly yet ineffective live line washing. It will also discuss implementation of a new CIGRE technical approach to select the most suitable insulator type and profile as well as coating formulation by setting up Naturally Polluted Insulator Pilot Testing Stations in Lahore and elsewhere.

Sessions: