Committee:
IEC/TC 37 Surge arresters
IEC/TC 99 Insulation co-ordination and system engineering of high voltage electrical power installations above 1,0 kV AC and 1,5 kV DC
IEC/TC 109 Insulation co-ordination for low-voltage equipment
IEC/PC 127 Low-voltage auxiliary power systems for electric power plants and substations
CLC/SR 37 Surge arresters
CLC/SR 109 Insulation co-ordination for low-voltage equipment
CLC/TC 99X Power installations exceeding 1 kV a.c. (1,5 kV d.c.)
* Some activities of this TC correspond to other AEN/CTN.
Standards developed by the committee: CTN 207/SC 99: 54
Status: VIGENTE / 2025-07-23
Grounding electrode. Coupling cylindrical bars of Steel-copper.
Status: VIGENTE / 2024-07-17
Insulation co-ordination - Part 2: Application guidelines
Status: VIGENTE / 2024-01-26
SURGE ARRESTERS. PART 3: ARTIFICIAL POLLUTION TESTING OF SURGE ARRESTERS.
Status: VIGENTE / 2024-01-01
Insulation co-ordination - Part 11: Definitions, principles and rules for HVDC system (Endorsed by Asociación Española de Normalización in January of 2024.)
Status: VIGENTE / 2023-12-01
Power installations exceeding 1 kV AC and 1,5 kV DC - Part 2: DC (Endorsed by Asociación Española de Normalización in December of 2023.)
Status: VALID / 2023-01-01
Insulation co-ordination - Part 11:Definitions, principles and rules for HVDC system
Insulation co-ordination - Part 12: Application guidelines for LCC HVDC converter stations (Endorsed by Asociación Española de Normalización in January of 2023.)
Status: VIGENTE / 2022-11-02
Earthing of power installations exceeding 1 kV a.c.
Status: VIGENTE / 2022-09-07
Power installations exceeding 1 kV AC and 1,5 kV DC - Part 1: AC (Endorsed by Asociación Española de Normalización in October of 2021.)
Status: VIGENTE / 2021-02-24
Insulation coordination for equipment within low-voltage supply systems - Part 1: Principles, requirements and tests
Status: VIGENTE / 2021-02-16
Grounding electrode. Coupling cylindrical bars of steel-copper.
GROUNDING ELECTRODE. COUPLING CYLINDRICAL BARS OF STEEL-COPPER.
Status: VIGENTE / 2020-06-24
Insulation co-ordination - Part 1: Definitions, principles and rules
Status: VIGENTE / 2018-10-17
Status: VIGENTE / 2018-05-01
Surge arresters - Part 5: Selection and application recommendations (Endorsed by Asociación Española de Normalización in May of 2018.)
Status: VIGENTE / 2018-03-01
Surge arresters - Part 8: Metal-oxide surge arresters with external series gap (EGLA) for overhead transmission and distribution lines of a.c. systems above 1 kV (Endorsed by Asociación Española de Normalización in March of 2018.)
Status: VIGENTE / 2018-02-28
Insulation coordination for equipment within low-voltage systems - Part 3: Use of coating, potting or moulding for protection against pollution
Status: VIGENTE / 2016-11-23
Surge arresters - Part 4: Metal-oxide surge arresters without gaps for a.c. systems
Status: VIGENTE / 2015-10-21
Insulation co-ordination - Part 5: Procedures for high-voltage direct current (HVDC) converter stations
Status: VIGENTE / 2015-01-01
Surge arresters - Part 9: Metal-oxide surge arresters without gaps for HVDC converter stations (Endorsed by AENOR in January of 2015.)
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