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Reference EN 60664-1:2007
Title Insulation coordination for equipment within low-voltage systems - Part 1: Principles, requirements and tests
Project Number 20603
Abstract/Scope Deals with insulation coordination for equipment within low-voltage systems. It applies to equipment for use up to 2 000 m above sea level having a rated voltage up to a.c. 1 000 V with rated frequencies up to 30 kHz, or a rated voltage up to d.c. 1 500 V. It specifies the requirements for clearances, creepage distances and solid insulation for equipment based upon their performance criteria. It includes methods of electric testing with respect to insulation coordination. The minimum clearances specified in this standard do not apply where ionized gases occur. Special requirements for such situations may be specified at the discretion of the relevant technical committee. This standard does not deal with distances - through liquid insulation, - through gases other than air, - through compressed air. Main changes have been made with respect to the previous edition: - Amendment of Japanese mains conditions with regard to the rated impulse voltages, the rationalized voltages and the nominal voltages of supply systems for different modes of overvoltage control - Amendment of dimensioning of clearances smaller than 0,01 mm - Alignment of the table and the corresponding formula regarding test voltages for verifying clearances at different altitudes - Amendment of interpolation of the creepage distance values for functional insulation - Amendment of creepage distance dimensioning taking into account ribs - Revision of the former Clause 4 'Tests and measurements' (now Clause 6) to achieve a more detailed description of the tests and their purpose, the test equipment and possible alternatives - Change of Annex C 'Partial discharge test methods' from a former technical report, Type 2 (now called TS), to a normative Annex C. Has the status of a basic safety publication in accordance with IEC Guide 104.


Current Stage code 6060
Current Stage code date 2007-07-13
Current Stage code deadline 2008-04-01
Deadline date for vote  


Directive(s) LVD (2006/95/EC)
Order Voucher  


IEC Technical Body IEC/TC 109
Reference Document IEC 60664-1:2007 (EQV)
ICS 29.080 - Insulation
29.080.30 - Insulation systems
Keywords Insulation coordination; LV
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 2007-07-13 2008-04-01 export to doc file  EN  FR  DE
5099 2007-07-01 2007-09-01  
5061 2007-05-23 2007-07-01  
5060 2006-09-29 2006-10-16 export to doc file  EN
5020 2006-03-03 2006-08-04  
1090 2006-02-28 2006-03-03  

Implementation Dates

date of Ratification (DOR) (1) 2007-07-01
date of Availability (DAV) (2) 2007-07-13
date of Announcement (DOA) (3) 2007-10-01
date of Publication (DOP) (4) 2008-04-01
date of Withdrawal (DOW) (5) 2010-07-01


Supersedes EN 60664-1:2003
Superseded by  
Normative reference (6) IEC Guide 104:1997
HD 472 S1:1989
corr. February 2002
IEC 60050-151:2001
IEC 60050-212:1990
IEC 60050-604:1987
IEC 60050-826:2004
EN 60068-1:1994
EN 60068-2-2:1993
EN 60068-2-14:1999
EN 60068-2-78:2001
EN 60085:2004
EN 60099-1:1994
EN 60112:2003
EN 60216-1:2001
EN 60243-1:1998
EN 60270:2001
IEC 60364-4-44:2001
EN 60664-4:2006
corr. October 2006
EN 60664-5:2003
EN 61140:2002
EN 61180-1:1994
EN 61180-2:1994

(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.