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Forums
4hv.org :: Forums :: High Voltage
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MOT's.

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Harry
Wed Aug 31 2011, 06:51PM Print
Harry Registered Member #4081 Joined: Wed Aug 31 2011, 06:40PM
Location: UK
Posts: 139
I was wondering, in a hypothetical situation, if one was to connect the HV output of one MOT to the primary of another, what would happen? I thought it would provide a high voltage output, but my knowledge of transformers is limited, and I don't have another MOT to try it out. Sorry for the stupid question, I'm new here.
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Dr. ISOTOP
Wed Aug 31 2011, 07:20PM
Dr. ISOTOP Registered Member #2919 Joined: Fri Jun 11 2010, 06:30PM
Location: Cambridge, MA
Posts: 652
A saturated MOT.
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Harry
Wed Aug 31 2011, 07:24PM
Harry Registered Member #4081 Joined: Wed Aug 31 2011, 06:40PM
Location: UK
Posts: 139
But would that produce the high voltage (I'm guessing around 20 - 25KV)? I know very little about saturation/inductors etc . .
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Ash Small
Wed Aug 31 2011, 07:25PM
Ash Small Registered Member #3414 Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245
Harry wrote ...

I was wondering, in a hypothetical situation, if one was to connect the HV output of one MOT to the primary of another, what would happen?.

You'd probably kill yourself. smile

Firstly, the insulation wouldn't take it, and it would short out.

Even if the insulation survived (which it won't) I think you'd have too many volts per turn for the core, but I'm still trying to understand this myself.

Welcome to 4HV.

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Sulaiman
Wed Aug 31 2011, 07:25PM
Sulaiman Registered Member #162 Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3141
A blown fuse/breaker and a silly grin .

for sinewave ac at fixed frequency, commercial transformers are near the safe limits at rated voltage or less. Just a moderate increase above rated voltage results in large currents due to saturation of the magnetic core.
Google 'transformer'
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Harry
Wed Aug 31 2011, 07:29PM
Harry Registered Member #4081 Joined: Wed Aug 31 2011, 06:40PM
Location: UK
Posts: 139
Hmm MOT's really aren't very versatile, 'Do it my way or I'll kill you. Or burn your house down.' I'll stick to making arcs for now, thanks for the help everyone!
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Patrick
Wed Aug 31 2011, 09:22PM
Patrick Registered Member #2431 Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
Harry wrote ...

I was wondering, in a hypothetical situation, if one was to connect the HV output of one MOT to the primary of another, what would happen? I thought it would provide a high voltage output, but my knowledge of transformers is limited, and I don't have another MOT to try it out. Sorry for the stupid question, I'm new here.
super dooper flames and sparks, bad smelling house for a few days.
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Dr. Dark Current
Wed Aug 31 2011, 10:15PM
Dr. Dark Current Registered Member #152 Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
Probably nothing would happen and the first MOT would start smoking soon. Maybe the second MOT would produce a higher voltage, but low current and much smaller arcs than a single MOT alone.
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Harry
Wed Aug 31 2011, 10:27PM
Harry Registered Member #4081 Joined: Wed Aug 31 2011, 06:40PM
Location: UK
Posts: 139
Just electrocuted some fruit, a grape will explode, an apple has internal arcing . . . the next rival for the light bulb, 2000VAC apples?
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