Introduction
1 Scope
2 Normative references
3 Terms and definitions
3.1 System voltages
3.2 Terms and definitions of an arrester
3.3 General terms
4 Metal-oxide gapless surge arresters
4.1 Marking
4.2 Service requirements
4.3 Requirements
5 Arrester classification
6 Type test
6.1 General
6.2 Insulation withstand tests on the arrester
housing
6.3 Residual voltage tests
6.4 Charge transfer test
6.5 Operating duty tests
6.6 Short-circuit tests
6.7 Internal partial discharge tests
6.8 Bending moment test
6.9 Seal leak rate test
6.10 Environmental tests
7 Routine tests and acceptance tests
7.1 Routine tests
7.2 Acceptance tests
Annex A (normative) - Flowchart of testing procedure
of bending moment
Annex B (informative) - Application guide
B.1 General
B.2 Service conditions
B.3 Nominal discharge current (I[n])
B.4 Continuous operating voltage d.c. (U[c])
B.5 Protection level (U[p]) and charge transfer capability
B.6 Procedure to select a surge arrester
Annex C (normative) - Direct lightning current impulse
withstand test
Bibliography