International Standards and Conformity Assessment for all electrical, electronic and related technologies



Reference EN 50068:1991
Title Wrought steel enclosures for gas-filled high-voltage switchgear and controlgear
Project Number 3077
Abstract/Scope This standard applies to fusion welded wrought steel enclosures pressurized with dry air, inert gas, for example sulphur hexafluoride or nitrogen or a mixture of such gases, used in indoor or outdoor installations of high-voltage switchgear and controlgear with rated voltages 72,5 kV and above, where the gas is used principally for its dielectric and/or arc-quenching properties. The enclosures comprise parts of electrical equipment not necessarily limited to the following examples: circuit-breakers, switch-disconnectors, disconnectors, earthing switches, current transformers, voltage transformers, surge arrestors, busbars and connections. The scope also covers pressurized components such as the centre chamber of live tank switchgear, gasinsulated current transformers, etc.


Current Stage code 6060
Current Stage code date 1991-02-08
Current Stage code deadline 1991-06-01
Deadline date for vote  


Order Voucher  


IEC Technical Body  
Reference Document  
Keywords Switchgear and controlgear; HV; Gas-filled; Wrougth steel enclosure
Note Corrigendum to EN issued August 2007
A-Deviation(s) AT, IT
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 1991-02-08 1991-06-01 export to doc file  EN
5099 1990-03-05 1990-04-05  
5020 1989-07-06 1990-01-15  
3090 1988-06-15 1988-11-15  
3020 1986-09-25 1987-03-31  
1000 1985-10-15 1985-12-01  

Implementation Dates

date of Ratification (DOR) (1) 1990-03-05
date of Availability (DAV) (2) 1991-02-08
date of Announcement (DOA) (3) 1990-09-01
date of Publication (DOP) (4) 1991-06-01
date of Withdrawal (DOW) (5) 1991-06-01


Superseded by  
Normative reference (6) EN 45020:1991
HD 358 S2:1987
ISO 6213:1983
ISO 6520:1982
EN 29000:1987
ISO R 373:1964

(1) Date of ratification (dor) date when the Technical Board notes the approval of an EN (and HD for CENELEC), from which time the standard may be said to be approved

(2) Date of availability (dav) date when the definitive text in the official language versions of an approved CEN/CENELEC publication is distributed by the Central Secretariat

(3) Date of announcement (doa) latest date by which the existence of an EN (and HD for CENELEC), a TS or a CWA has to be announced at national level

(4) Date of publication (dop) latest date by which an EN has to be implemented at national level by publication of an identical national standard or by endorsement

(5) Date of withdrawal (dow) latest date by which national standards conflicting with an EN (and HD for CENELEC) have to be withdrawn

(6) This list of normative references is purely indicative. The only official list of normative reference is the list of the published standard.