DD IEC/TS 60815-2:2008

Selection and dimensioning of high-voltage insulators intended for use in polluted conditions. Ceramic and glass insulators for a.c. systems | Status: Superseded, Withdrawn

1 Scope and object IEC/TS 60815‑1, which is a technical specification, is applicable to the selection of ceramic and glass insulators for a.c. systems, and the determination of their relevant dimensions, to be used in high-voltage systems with respect to pollution. This part of IEC 60815 gives specific guidelines and principles to arrive at an informed judgement on the probable behaviour of a given insulator in certain pollution environments. The basis for the structure and approach of this part of IEC 60815 is fully explained in IEC/TS 60815‑1. The object of this technical specification is to give the user means to:

• • determine the reference unified specific creepage distance (RUSCD) from site pollution severity (SPS) class;
• • evaluate the suitability of different insulator profiles;
• • determine the necessary USCD by applying corrections for insulator shape, size, position, etc. to the RUSCD;
• • if required, determine the appropriate test methods and parameters to verify the performance of the selected insulators.