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 / 2006-11-29
Insulation coordination for equipment within low-voltage systems -- Part 4: Consideration of high-frequency voltage stress (IEC 60664-4:2005)
Status: ANULADA / 2025-01-11
Earthing of power installations exceeding 1 kV a.c.
Status: ANULADA / 2024-08-12
Power installations exceeding 1 kV a.c. - Part 1: Common rules
Status: ANULADA / 2023-07-01
Insulation coordination for equipment within low-voltage systems - Part 1: Principles, requirements and tests
Status: ANULADA / 2022-09-13
Insulation co-ordination - Part 1: Definitions, principles and rules
Status: ANULADA / 2021-04-21
Insulation co-ordination - Part 2: Application guide
Status: ANULADA / 2021-02-24
Surge arresters - Part 5: Selection and application recommendations (Endorsed by AENOR in November of 2013.)
Status: ANULADA / 2020-12-20
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 AENOR in September of 2011.)
Status: ANULADA / 2020-06-17
Insulation coordination for equipment within low-voltage systems - Part 3: Use of coating, potting or moulding for protection against pollution
Status: ANULADA / 2017-08-05
Surge arresters - Part 4: Metal-oxide surge arresters without gaps for a.c. systems
Status: ANULADA / 2016-11-23
Surge arresters - Part 4: Metal-oxide surge arresters without gaps for a.c. systems (Endorsed by AENOR in January of 2015.)
Status: ANULADA / 2016-06-27
Surge arresters - Part 5: Selection and application recommendations
Status: ANULADA / 2016-05-05
Insulation coordination for equipment within low-voltage systems -- Part 5: Comprehensive method for determining clearances and creepage distances equal to or less than 2 mm.
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