Hello Rich;
Can I suggest to the safety testing agency to disconnect or stall the fan rotor
for all testing? Would this then mean the CFM rating for the cooling fan would
not be required?
Regards;
Ian McBurney
Design Compliance Engineer.
Allen Heath Ltd.
Kernick Industrial Estate,
Penryn,
Hello Ian:
In my opinion, if you stalled the fan for all testing,
there would be no reason to require the CFM rating.
Stalling the fan would be the better course of action
as this would require the fan motor to dissipate some
power as well as the series resistor, thus causing
more heat --
From: Richard Nute
Sent: Monday, December 16, 2013 11:03
Stalling the fan would be the better course of action
as this would require the fan motor to dissipate some
power as well as the series resistor, thus causing
more heat -- but not much -- in the equipment.
My experience with small
Stalling would like be required by the agency anyway since a typical failure is
a jam or bearing failure that would lock the rotor.
Gary
From: Richard Nute [mailto:ri...@ieee.org]
Sent: Monday, December 16, 2013 11:03 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Cooling fan safety
Can anyone:
-confirm that wire nuts are not allowed in induction motor junction boxes in
the EU?
-provide reasons why?
-suggest solutions other than permanently mounted terminal strips?
I'm not finding this in IEC 60204-1, but it seems to be a common practice that
IEC motors have
IIRC NFPA79 is almost a clone of 60204-1 :-)John AllenCompliance with ExperienceW.London. UKSent from my FonepadMike Sherman - Original Message - msherma...@comcast.net wrote:Can anyone:
-confirm that wire nuts are not allowed in induction motor junction boxes in the EU?
-provide reasons
In message
1771936259.98100.1387233101354.javamail.r...@sz0110a.emeryville.ca.mail.
comcast.net, dated Mon, 16 Dec 2013, Mike Sherman - Original
Message - msherma...@comcast.net writes:
-confirm that wire nuts are not allowed in induction motor junction
boxes in the EU?
-provide
PSNet,
There was a lot of work in the US to harmonize IEC 60204
with NFPA 79 about a decade ago.
Machine manufacturers are using NFPA 79 as a proxy for 60204
since their shops and suppliers understand the requirements expressed in
this way.
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