Dear Colleagues,
It came to my attention the text of the subject Clause.
1. "It is the responsibility of the relevant technical committee to
specify the amount of water which may be allowed to enter the enclosure
and the details of a dielectric strength test, if any"
QUESTION: is anybody aware about any such specifications made by a TC in
charge with the EN (IEC)60950 Standard?
2. Within the next paragraph is specified:
In general, if any water..., it shall not:
Be sufficient to interfere with the correct....OR impair safety,
followed by:
Deposit on insulation parts where it COULD lead to tracking along the
creepage distance...
QUESTIONS:
2.1. Do you think that "tracking along the creepage distance"
may impair safety OR may disturb the correct operation? and
2.2. Does the word "COULD" offers an open door for
INTERPRETATION of the test result ?, OR there is a clear way to consider
a decision ? (in my opinion, the second paragraph is redundant, and
gives the degree of freedom for an arbitrary interpretation, and that
line shall be removed).
3. Does anyone knows the TC in charge with this document where I may ask
for an opinion regarding Question 2.1 ?
4. Are there any CTL decisions regarding this Clause, and if the answer
is yes, where those may be accessed? (I was not able to find the former
link related to the CTL decisions).
Please accept in advance my many thanks for your assistance regarding
this subject and have a very good week!
Respectfully yours,
Constantin
Constantin Bolintineanu P.Eng.
Digital Security Controls (DSC)
a Division of Tyco Safety Products Canada
3301 LANGSTAFF Road, L4K 4L2
CONCORD, ONTARIO, CANADA
e-mail: cbolintine...@dsc.com
Tel: 905 760 3000 ext 2568
Fax: 905 760 3020
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