GB/T 28547-2012 Selection and application recommendations of metal oxide surge arresters for a.c.systems

Scope

This standard proposes selection and application recommendations for lightning arresters used in AC systems with a nominal voltage greater than 1 kV. These recommendations apply to AC non-gap metal-oxide arresters defined in GB 11032, series-gap arresters with a rated voltage of 52 kV or lower defined in GB/T 28182-2011, and series-external-gap metal-oxide arresters defined in IEC 60099-8, DL/T 815-2002, and JB/T 10497-2005 for overhead transmission and distribution lines.
GB 311.1 and GB/T 311.2 provide principles for insulation coordination in power systems. Insulation coordination is a process to ensure the safety, reliability, economy, and risk management of high-voltage grids and substations during design and operation. The use of lightning arresters enables systems and equipment to operate at an acceptable risk level within a certain insulation level and minimizes economic losses.
The introduction of analysis models and power system transient simulations further optimizes the selection of equipment insulation levels. In power system design and operation, the selection of lightning arresters is becoming increasingly important. It should be recognized that the reliability of power systems and equipment depends on the size of the safety margin chosen by users when designing and selecting equipment and lightning arresters.
The residual voltage of lightning arresters is a key parameter considered by most users when selecting lightning arresters. GB 11032 provides the maximum residual voltage of typical lightning arresters. However, for some systems, if there is better operational experience or better-performing lightning arresters, they can be selected according to actual circumstances.

Development Information

Superseded by the following standards

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