British Standards Institution

Source:: IEC
Committee:: PEL/37 - Surge Arresters
Categories:: Fuses. Overcurrent protection devices | Substations. Surge arresters
Number of comments:: 0

Scope

This part of IEC/IEEE 60099 covers metal-oxide line surge arresters (LSA) that may be Non-Gapped Line Arresters (NGLA) or Externally Gapped Line Arresters (EGLA) for use on transmission and distribution power lines with system voltages > 1kV a.c., to mainly protect insulator assemblies from lightning-caused flashovers.

1.1 Purpose

To define tests that demonstrate that the line surge arrester (LSA) can survive the rigors of reasonable environmental conditions and system phenomena while protecting equipment and/or the system from damaging overvoltages caused by lightning, switching, and other system disturbances.

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Standard timeline

1. Proposal (Complete)

Proposal start date:

2. Draft (Complete)

Draft start date:

22/04/2026

3. Public Comments

Public Comments start date:

21/10/2025

Public Comments end date:

10/12/2025

Learn more about the standards development process

Standards Development

BS EN IEC/IEEE 60099-11 BS IEC/IEEE 60099-11 Surge Arresters. Part 11: Metal-oxide Surge Arresters to Protect Power Line Insulation

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