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Re: About MOTs..

Original poster: "Mike" <mike.marcum@xxxxxxxxxxxx>

A crude approach would be to plug it in and try to draw an arc off the secondary. If it pops a 15A breaker then limiting is needed. Also, all the ones I came across had shunts between the pri and sec and was limited to around 14A with the biggest ones where the transformer is mounted sideways in the cabinet (1400-1500W microwave).

----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Friday, April 08, 2005 7:10 PM
Subject: Re: About MOTs..

Original poster: "Mercurus2000" <mercurus2000@xxxxxxx>

Hmm, how can you tell when a MOT doesn't require current limiting?
----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Friday, April 08, 2005 7:47 AM
Subject: RE: About MOTs..

> Original poster: "Mark Dunn" <mdunn@xxxxxxxxxxxx> > > > Adam: > > The Primary side of the large MOT is not insulated well enough to handle > the ~2000 volts that you will try to run it at. It will arc to the > core, arc across the windings, etc. Most MOT's need current limiting. > There are a few that don't. I think in your special application you > will require it. I have built current limiting inductors for my MOT's > and can give you guidance. My typical MOT Primaries draw 50 to 75 amps > at 120 VAC with the secondaries shorted. > > You would be better served to use the 1000 watt MOT alone and build a > voltage multiplier for the HV side. You will still need current > limiting for this configuration. > > If you are trying to build a power supply for a TC I/We can point you to > a number of websites that have used MOT's. > > Mark > > > -----Original Message----- > From: Tesla list [mailto:tesla@xxxxxxxxxx] > Sent: Thursday, April 07, 2005 6:30 PM > To: tesla@xxxxxxxxxx > Subject: About MOTs.. > > > Original poster: "Mercurus2000" <mercurus2000@xxxxxxx> > > This question has probably been asked before, I want to connect the high > > voltage output of a small like 600 watt MOT I have to the 120 side of a > really large MOT like 1000w to get about 20-30KV out, I'll vacuum pot > the > MOTs in oil and cut the center ground on the large MOT to prevent > arcing, > does anyone see a problem with this? Will I have to use some sort of > current limiting even tho I'm using a little 600 watt MOT for the > primary > transformer? > Adam > > > > > -- > No virus found in this incoming message. > Checked by AVG Anti-Virus. > Version: 7.0.308 / Virus Database: 266.9.5 - Release Date: 4/7/05 > >