forwarding for Lal Bahra ____________________Reply Separator____________________ Subject: Re: IEC 62151 Author: lal.ba...@us.ul.com List-Post: emc-pstc@listserv.ieee.org Date: 5/19/00 6:40 AM
Hello to all of you:
Yesterday when I replied to your E-mail, I typed the standard number IEC
62151 at some places and IEC 61251 at other places. My apologies. Following
message contains the correct numbers. I just received a copy of IEC 62151.
It is published May 2000. I found the following:
There are new definitions the following:
Hazardous-live-part: This is used in lieu of hazardous voltage in IEC
60950.
Accessible: Same meaning as in IEC 60950 but it is defined in IEC 62151.
TNV-0: Same as SELV in IEC 60950.
Protective earthing: IEC 60950 does not have a definition but the same
understanding.
The only other difference is that IEC 62151 does not have the "summation of
touch currents" which is covered in IEC 60950. This requirement primarily
applies to PABX type equipment which may have hundreds or thousands of
trunk lines. Equipment other than telecommunication equipment may never use
this requirement.
Thanks and best regards.
Lal Bahra
--------------------------------------------------------------------------
IEC 62151 has just been published. It replaces IEC guide 105.
IEC 60950 has its own complete requirements for equipment connected to
Telecommunication network. The requirements of IEC 62151 are based on the
requirements of IEC 60950 except for minor differences in terminology. For
example, in IEC 62151, SELV circuit is designated as a TNV-0 circuit. IEC
62151 is a basic safety publication and all IEC technical committees other
than TC74, whose products have connections to the telecom network must use
the requirements of IEC 62151 and make a reference to this standard unless
they have a properly rationalized justification.
TC 74 was given the task of writing the basic safety standard for "Safety
of Equipment electrically connected to a telecommunication network" . This
standard IEC 62151 covers only the interface to telecom network. The
requirements of the end product standard apply to the product under
consideration.
EN41003 is a European Community standard and would have many differences
from IEC 62151 just as it had differences from IEC 60950. IEC 62151 is
similar to the telecom requirements of IEC 60950.
Thanks and best regards.
Lal Bahra
------------------------
Stefan
Hipskind To: emc-p...@ieee.org
cc: Jerilyn M.
Merrill/NBK/ULI@ULI, Lal
05/18/00 Bahra/NBK/ULI@ULI
02:21 PM Subject: IEC 62151
To All,
Opinions and answers fall below in red.
All:
I recently received an email notice of a new product safety standard:
IEC 62151 "Safety of equipment electrically connected to a
telecommunication
network".
--How does this standard relate to IEC 950 / 60950? To my understanding it
is used when product is not covered under UL1950, but has telecommunication
circuitry. Closed loop systems is when you typically use IEC 62151.
--Will it be used in conjunction with 950, or stand-alone? IEC 62151 is a
stand alone.
--Is this similar to / reminiscent of EN 41003? Unfortunately, I do not
have an answer on this, you may wish to contact Mr. Lal Bahra at (847)
272-8800, Ext 43492 He is considered our leading authority on this
standard and sits on the working group for the standard.
Thanks in advance for the insights. Hope it helps.
John Boucher
Lucent Technologies Inc.
Stefan Hipskind
Underwriters Laboratories
Account Executive, EMC
e-mail stefan.hipsk...@us.ul.com
Phone 1.847.272.8800, ext 42975
Fax 1.847.509.6311
Cell Phone 1.847.542.8736
----- Forwarded by Stefan Hipskind/NBK/ULI on 05/18/00 02:12 PM -----
"Boucher, John"
<j...@bighorn.dr.l To: "'emc-p...@ieee.org'"
ucent.com> <emc-p...@ieee.org>
Sent by: cc:
owner-emc-pstc@iee bcc:
e.org Subject: IEC 62151
05/18/00 11:29 AM
Please respond to
"Boucher, John"
To All,
Opinions and answers fall below in red.
All:
I recently received an email notice of a new product safety standard:
IEC 62151 "Safety of equipment electrically connected to a
telecommunication
network".
--How does this standard relate to IEC 950 / 60950? To my understanding it
is used when product is not covered under UL1950 (Medical, Vending, ) but
has telecommunication circuitry. This is when you typically use IEC 62151.
--Will it be used in conjunction with 950, or stand-alone? IEC 62151 is a
stand alone.
--Is this similar to / reminiscent of EN 41003? Unfortunately, I do not
have an easy answer on this, you may wish to contact Mr. at (847)
272-8800, Ext 4 He is considered our leading atuhority on this standard.
Thanks in advance for the insights.
John Boucher
Lucent Technologies Inc.
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