CENELEC (Comité Européen de Normalisation
Électrotechnique) published what is believed to be the last change to the EN
60950-1 standard in August 2013. 60950-1
covers general safety requirements for Information Technology Equipment
(ITE). Commonly known as “Amendment 2”,
the safety files will now refer to either EN 60950-1:2006 + A11:2009 + A1:2010
+ A12:2011 + A2:2013 or EN 60950-1:2006/A2:2013. The date of withdrawal is July 2nd,
2016 and power supply manufacturers are updating their files to the new version
of the standard.
UL & CSA announced their update to
60950-1 on October 14th, 2014, but unlike Europe, the Amendment 2
revision is not mandatory to existing files.
New products though are being certified to UL 60950-1, 2nd Edition,
2014-10-14 and CAN/CSA C22.2 No. 60950-1-07, 2nd Edition, 2014-10.
This should be the last change as June 2019
will see the move to IEC 62368-1:2014 for both IEC 60950-1 and IEC 60065. The changes are considered as mainly
clarifications to smooth that transition.
The safety bodies have commented on their websites that there would be
minimal impact to power supply manufacturers for Amendment 2.
The changes for most power supplies for
Amendment 2 are:
Any graphics used are to comply with ISO
standards and must be explained in the installation manual.
Humidity testing has been introduced for
equipment “designated for tropical regions”.
CCC & CQC certifications for China are already referring to this.
Similarly, to reflect a common Chinese requirement
for 5,000m operation, the addition of a symbol will indicate if the equipment
is to be operated at a maximum of 2,000m.
This is not an issue for UL, EN or CB.
Non lead acid batteries (with the exception
of button cells) must comply with IEC 62133, and will only affect a very
limited number of power supplies.
The use of VDRs - voltage dependant
resistors – (a major change for Edition 1), have had a flammability requirement
added.
As a note, all the self-certified
Declarations of Conformity for CE marking will have to be re-written and
posted.
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