Re: Phasing of multiple T
Subject: Re: Phasing of multiple T
From: mark.graalman-at-mediccom.norden1-dot-com (Mark Graalman)
Date: Wed, 13 Sep 1995 16:37:00 -0500
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Te> Date: Wed, 13 Sep 95 11:10:58 EDT
Te> From: "I am the NRA." <pierson-at-msd26.enet.dec-dot-com>
Te> To: mail11:;-at-msd26.enet.dec-dot-com (-at-teslatech)
Te> Cc: pierson-at-msd26.enet.dec-dot-com
Te> Subject: Phasing of multiple Transformers
Te> Possibly Silly Suggestion:
Te> On coils using multiple power transformers, especially during initial
Te> would it be desirable to have each output fused separately?
Te> Any connected out of phase should blow fuse(s), indicating clearly
Te> that Something Was Rong.
Te> This may be a dumb idea:
Te> 1) HV fuses are hard to come by...
Te> 2) Low current fuses are hard to come by...
Te> In more detail:
Te> 1) typical fuses are designed to interupt 110VAC, NOT 15KV & up.
Te> A bare fuse (I am thinking glass, tubular, not "edison (8)>>) base")
Te> with wires on it for temporary use might do. Or simply a bit of VERY
Te> fine wire. Either mounted so as to not dreate a hazard when it
Te> 2) Low current fuses, as little over the rating as possible, as neon
Te> sign transformers (especially) will self protect.  Maybe from
Te> finest wire?
Te> Or does the self protection make such coomplexity as addded fuses
Te> redundundat? Even if the neon sign transformer is not damaged, a blown
Te> fuse would indicate a
Te> phasing problem _quick_. My guess (comments???) is that at least with
Te> neon sign transformers, the self protecting design would make it
Te> useless to fuse the _primary_.
MG> If I understand your question right, it would be a waste of time.
MG> If the transformers are out of phase there is no current flow due to
MG> cancellation in the windings and core, so the fuse would do nothing.
... Alias, Mark the spark
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