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Registered Member #3824
Joined: Sun Apr 10 2011, 08:29PM
Location: Edmonton, Alberta, Canada
Posts: 54
Hi, I'm having trouble drawing arcs from a single MOT. Phasing is obviously not the issue, and I have checked the secondary with a voltmeter and at about 35V input I get 200V out. ?? Whats going on here?
Registered Member #3824
Joined: Sun Apr 10 2011, 08:29PM
Location: Edmonton, Alberta, Canada
Posts: 54
yeah its on a variac so I've pumped it up to 120V quite a few times now and cant draw more than a really crappily made flyback. I have another MOT primary in series because when I connected it without a ballast it blew my 20A fuse??
Registered Member #996
Joined: Sun Sept 09 2007, 06:17PM
Location: Canada
Posts: 16
LD LANGER wrote ...
yeah its on a variac so I've pumped it up to 120V quite a few times now and cant draw more than a really crappily made flyback. I have another MOT primary in series because when I connected it without a ballast it blew my 20A fuse??
This is ridiculous.
Is the secondary of the MOT you are using for a ballast shorted? If not your power throughput will be seriously limited.
Registered Member #3824
Joined: Sun Apr 10 2011, 08:29PM
Location: Edmonton, Alberta, Canada
Posts: 54
mnr wrote ...
LD LANGER wrote ...
yeah its on a variac so I've pumped it up to 120V quite a few times now and cant draw more than a really crappily made flyback. I have another MOT primary in series because when I connected it without a ballast it blew my 20A fuse??
This is ridiculous.
Is the secondary of the MOT you are using for a ballast shorted? If not your power throughput will be seriously limited.
Yes, I left the secondary OC. That is where the problem most likely lies. Just how does the power throughput increase with a shorted secondary? Does the transformer saturate when the secondary is SC allowing higher current through?
Registered Member #996
Joined: Sun Sept 09 2007, 06:17PM
Location: Canada
Posts: 16
LD LANGER wrote ...
Yes, I left the secondary OC. That is where the problem most likely lies. Just how does the power throughput increase with a shorted secondary? Does the transformer saturate when the secondary is SC allowing higher current through?
Thanks a lot
When the secondary is open circuited only the magnetizing reactance is providing a current path. When the secondary is short circuited, you will be limiting the current with the leakage reactance, which is much lower than the magnetizing reactance.
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problem drawing arc from single MOT?
