I read in !emc-pstc that John Woodgate j...@jmwa.demon.co.uk wrote (in
syyeqfagtkp8e...@jmwa.demon.co.uk) about 'Switch Inrush Ratings', on
Wed, 9 Jan 2002:
I read in !emc-pstc that duncan.ho...@snellwilcox.com wrote (in
3642233...@snellwilcox.com) about 'Switch Inrush Ratings', on Wed, 9
Jan
To: emc-p...@majordomo.ieee.org
Subject:Re: Switch Inrush Ratings
I read in !emc-pstc that Rich Nute ri...@sdd.hp.com wrote (in
200201102027.maa26...@epgc264.sdd.hp.com) about 'Switch Inrush
Ratings', on Thu, 10 Jan 2002:
Taking John Woodgate's usual response to such
an inquiry, I did
://www.tagmclaren.com
-Original Message-
From: Peter Tarver [SMTP:peter.tar...@sanmina-sci.com]
Sent: 10 January 2002 23:46
To: Product Safety Technical Committee
Subject: RE: Switch Inrush Ratings
I haven't followed the Woodgate approach :), hopefully the
information Rich
I read in !emc-pstc that Peter Tarver peter.tar...@sanmina-sci.com
wrote (in nebbkemlgllmjofmoplemecbdbaa.peter.tar...@sanmina-sci.com)
about 'Switch Inrush Ratings', on Thu, 10 Jan 2002:
I haven't followed the Woodgate approach :),
My approach in this case was to cite the relevant
I haven't followed the Woodgate approach :), hopefully the
information Rich discovered also includes such relevant
concerns as:
power factor for general use
power factor for inductive/motor loads
power factor for pilot duty loads
heavy power factor (perhaps as low as 0.10)
incandescent
I read in !emc-pstc that Rich Nute ri...@sdd.hp.com wrote (in
200201102027.maa26...@epgc264.sdd.hp.com) about 'Switch Inrush
Ratings', on Thu, 10 Jan 2002:
Taking John Woodgate's usual response to such
an inquiry, I did a Google search on inrush.
I don't think I use that response any more often
Taking John Woodgate's usual response to such
an inquiry, I did a Google search on inrush.
Surprisingly (to me), there is a wealth of
reasonably good info on the web under the subject
of inrush, including switches rated for inrush
current.
Best regards,
Rich
Duncan,
You might want to get all the info you can get on
contact ratings for mechanical relays and contactors.
Then, use that information by analogy.
DC operation of a switch is the more destructive by
orders of magnitude than AC operation. Since the
normal cycle of AC will quench any
The starting point is the manufacturers data sheet where you will find the
rated current, voltage and typical operating life under certain conditions.
A lot depends on the energy level of the in-rush in question.
When the application has a high in-rush current in proportion to the steady
I read in !emc-pstc that duncan.ho...@snellwilcox.com wrote (in
3642233...@snellwilcox.com) about 'Switch Inrush Ratings', on Wed, 9
Jan 2002:
Does anyone know how the inrush capability of switches is specified? Is
there a particular standard for how inrush (with regard to switches not EMC) is
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