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RE: What wattage resistors for NST protection?
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To: tesla@pupman.com
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Subject: RE: What wattage resistors for NST protection?
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From: "Lau, Gary" <Gary.Lau@compaq.com> (by way of Terry Fritz <twftesla@uswest.net>)
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Date: Thu, 17 Feb 2000 08:15:06 -0700
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Approved: twftesla@uswest.net
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Delivered-To: fixup-tesla@pupman.com@fixme
Aluminum-clad power resistors are NOT suitable for use in NST protection
networks. Since they are required to develop tens of kV from end-to-end,
the aluminum heat sinks will seriously compromise their voltage holdoff
capability. All-ceramic units of sufficient wattage should not have this
problem.
Gary Lau
Waltham, MA USA
>A quick warning about grossly overrunning resistors - I have seen the
>end seals of one of the (usually) gold-coloured aluminium clad power
>resistors disintegrate with considerable speed and an alarming BANG
>when severely overstressed. ceramic types could also possibly shatter.
>be careful!