IEC 60099-6:2002 pdf free download Surge arresters – Part 6: Surge arresters containing both series and parallel gapped structures – Rated 52 kV and less
1 General
1.1 Scope
This part of IEC 60099 applies to non-linear metal-oxide resistor type surge arresters with spark gaps designed to limit voltage surges on a.c. power circuits.
This standard basically applies to all metal-oxide surge arresters with gaps and housed in either porcelain or polymeric housings.
This standard specifies requirements and tests for metal-oxide surge arresters with internal series gaps, with rated voltages 52 kV and below.
The following arrester types and ratings are presently under consideration, but are not addressed in this standard. They will not be addressed until more information can be ascertained on the individual subjects:
• series gapped arresters above 54 kV;
• externally gapped arresters, all ratings;
• shunt gapped arresters, all ratings;
• line discharge class 2, 3, 4 and 5.
1.2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
lEC 60060-1:1989, High-voltage test techniques – Part 1: General definitions and test requirements
IEC 60060-2:1994, High-voltage test techniques – Part 2: Measuring systems
lEC 60099-1:1991, Surge arresters – Part 1: Non-linear resistor type gapped surge arresters for a.c. systems
lEC 60099-3:1990, Surge arresters – Part 3: Artificial pollution testing of surge arresters
IEC 60099-4:1991, Surge arresters – Part 4: Metal-oxide surge arresters without gaps for a.c.systems
Amendment 1 (1998)
Amendment 2 (2001) 1
IEC 60270: 2000, High-voltage test techniques – Partial discharge measurements
2 Definitions
For the purposes of this part of IEC 60099, the following definitions apply.
2.1
metal-oxide surge arrester without gaps
arrester having non-linear metal-oxide resistors connected in series and/or in parallel without any integrated series or parallel spark gaps
NOTE See 2.55 for metal-oxide surge arrester with series gapped structures.
2.2
non-linear metal-oxide resistor
part of the surge arrester which by its non-linear voltage versus current characteristics acts as a low resistance to overvoltages, thus limiting the voltage across the arrester terminals, and as a high resistance at normal power frequency voltage
2.3
internal grading system of an arrester grading impedance, in particular linear/non-linear resistors and/or grading capacitors connected in parallel to one or to a group of non-linear metal-oxide resistors and/or series gap, to control the voltage distribution along the arrester and/or between the metal oxide resistors and gaps
IEC 60099-6:2002 pdf free download
