Re: What wattage resistors for NST protection?

To: tesla-at-pupman-dot-com
Subject: Re: What wattage resistors for NST protection?
From: Terry Fritz <twftesla-at-uswest-dot-net>
Date: Wed, 16 Feb 2000 07:00:50 -0700
Approved: twftesla-at-uswest-dot-net
Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme
In-Reply-To: <3.0.5.32.20000216230118.00af0100-at-pop3.xtra.co.nz>
References: <4.1.20000215120640.009ec940-at-pop.dnvr.uswest-dot-net>

Hi Gavin,

During a transeint spike.  Those NST filter resistors can see the full
voltage on that leg.  Perhaps 11000 volts peak!  However, the insulation is
still adequate.

Cheers,

	Terry


At 11:01 PM 02/16/2000 +1300, you wrote:
snip....
>very low (typically less than 0.5 watt).
>
>Safe coiling,
>
>Gavin Hubbard
>
>
>P.S. The reason you don't need special HV resistors for the filters or MMC
>is again the small current these devices 'see'. For the first example
>
>V = I * R
>= 0.06 * 1000
>= 600 volts
>
>In a 20 turn wire-wound resistor this is only 30 volts per turn. The
>insulation will easily cope with this.
>

References:

What wattage resistors for NST protection?

From: "William Parn" <parn-at-fgm-dot-com> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)