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



Reference EN 60664-4:2006
Title Insulation coordination for equipment within low-voltage systems - Part 4: Consideration of high-frequency voltage stress
Project Number 15569
Abstract/Scope Deals with basic, supplementary and reinforced insulation subjected to high-frequency voltage stress within low-voltage equipment. The dimensioning values directly apply for basic insulation; for reinforced insulation additional requirements apply according to Part 1. It is applicable for the dimensioning of clearances, creepage distances and solid insulation stressed by any type of periodic voltages with a fundamental frequency above 30 kHz and up to 10 MHz. This part of EN 60664 can only be used together with EN 60664-1 or with EN 60664-5 (in this standard called Part 1 or Part 5). By using Part 1 or Part 5 together with this part the frequency limit of Part 1 or Part 5 is extended to frequencies higher than 30 kHz. This part also applies to Part 3 for frequencies greater than 30 kHz and protection of type 1. For type 2 protection this question is under consideration. Applies to equipment for use up to 2 000 m above sea level having a rated voltage up to a.c. 1 000 V. Specifies the requirements for clearances, creepage distances and solid insulation for equipment based upon their performance criteria. lt includes methods of electric testing with respect to insulation coordination. The minimum clearances specified in this part do not apply where ionized gases occur. Special requirements for such situations may be specified at the discretion of the relevant technical committee. This part does not deal with distances - through liquid insulation, - through gases other than air, - through compressed air. The object of this standard is to guide technical committees responsible for different equipment in order to rationalise their requirements so that insulation coordination is achieved when specifying clearances in air, creepage distances and solid insulation for equipment. The major changes made during the revision of EN 60664-4 were the following: - inclusion of more recent information about the withstand characteristics of insulation at high-frequency voltage stress


Current Stage code 6060
Current Stage code date 2006-01-27
Current Stage code deadline 2006-08-01
Deadline date for vote  


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


IEC Technical Body IEC/TC 109
Reference Document IEC 60664-4:2005 (EQV)
ICS 29.080.30 - Insulation systems
Keywords Insulation coordination; LV; Voltage stress; High-frequency
Note Corrigendum to EN issued October 2006
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 2006-01-27 2006-08-01 export to doc file  EN  FR  DE
5099 2005-10-01 2006-01-01  
5061 2005-08-31 2005-10-01  
5020 2005-06-10 2005-08-12  
4099 2004-10-08 2005-03-01  
4020 2004-03-05 2004-08-06  
3099 2002-03-05 2002-08-05  

Implementation Dates

date of Ratification (DOR) (1) 2005-10-01
date of Availability (DAV) (2) 2006-01-27
date of Announcement (DOA) (3) 2006-01-01
date of Publication (DOP) (4) 2006-08-01
date of Withdrawal (DOW) (5) 2008-10-01


Superseded by  
Normative reference (6) IEC Guide 104:1997
EN 60112:2003
EN 60664-1:2003
EN 60664-5:2003

(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.