Surge Protection to BS EN/IEC 62305 Unit 10: BS 7671 regulations on surge protection (3)
Part 5 of BS 7671 is all about the requirements of the selection and erection of equipment. This unit will introduce the relevant regulations in Part 5 as applied to surge protection in terms of specific SPD characteristics and methods of connection of SPDs.
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Dr Tony Sung, Director, Energy Reduction Management Ltd
Tony is an independent Chartered Energy and Electrical Engineering Consultant. Tony was the course tutor for the MEng(Hons) degree course in Architectural Science and Engineering Services at Manchester University. He has given lectures in Lightning and Surge Protection to BEng(Hons), MEng(Hons) and MSc students in UK and Overseas universities. He is currently the Chairman of CIBSE Electrical Services Group and representing CIBSE on BS7671 the main JPEL64 committee.
Mr Robin Earl, Market Development Manager, DEHN (UK) Ltd.
Robin has over twenty years experience of the field surge protection, originally trained by DEHN and SOHNE prior to the establishment of the DEHN UK Office. He is currently serving in BS7671 JPEL64 subcommittee D on Surge Protection and Foundation Earthing. He has presented many CPD seminars on Surge Protection and Lightning protection to IET and CIBSE members.
• Understand the SPD CT1 4+0 connection method for TN systems.
• Understand the SPD CT2 3+1 connection method for TT systems.
• Understand how the LPZ concept describes the installation of Type 1, Type 2 and Type 3 SPDs.
• Understand the selection of SPDs using voltage and current characteristics.
• Understand the 10m rule for SPDs in BS 7671.
• Understand the danger of dynamic voltage drop in the SPD connection leads.
• Understand the requirements for energy coordination of two or more SPDs and application conflict between spark gap and varistor types of SPDs.