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Registered Member #1225
Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253
I have started winding my secondary again... I have 10 inches so just.... 25 inches to go....
Also, i have decided i am going to use some power resistors in place of the 4 mots as a current limiter. They are going to be 100 ohm 100 watt and i am going to use one for + output and one for -. I got four of those resistors for just 16 bucks including shipping.
Registered Member #1630
Joined: Sat Aug 09 2008, 11:36AM
Location: Seoul Korea
Posts: 115
Dr. Kilovolt wrote ...
Wirenut wrote ...
<-----My MOT 6-pack drew <100 amps unballasted into a dead short, drawing an arc. More like 30-40A max with the coil running at 700bps with a .15uF cap. There's no way you'll trip a 100A main breaker with 2 mots.
I think people are often "measuring" their current by their breaker rating, but that's bad because the breaker will give twice the amps for half a minute maybe.
I had an asymetrical 5 pack once pull 84A momentarily before my breaker blew, these are North American radar range MOTS for old ovens. These deliver 2.5-3Kv each @ 650- 1000mA short circuit. They weight about 5 or 6 kgs each.. thereabouts. The frequency doesn't matter and the overall winding configuration does. European xmfrs are rated for 240V service as are the ones here in Korea. They are essentially the same xmfrs, the difference comes in the windings. VA is = North American XMFR it's just that the xmfr is wound 240 instead of 120v
Registered Member #1225
Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253
Wirenut wrote ...
<-----My MOT 6-pack drew <100 amps unballasted into a dead short, drawing an arc. More like 30-40A max with the coil running at 700bps with a .15uF cap. There's no way you'll trip a 100A main breaker with 2 mots.
Well, with a .05 uf capacitor and no more than 400bps rsg i am hoping not to trip a 20 amp breaker. Think it would work out like that?
Registered Member #141
Joined: Sat Feb 11 2006, 01:14PM
Location: Southern California
Posts: 96
Posted: Tue Aug 26 2008, 05:19PM Wirenut wrote ...
<-----My MOT 6-pack drew <100 amps unballasted into a dead short, drawing an arc. More like 30-40A max with the coil running at 700bps with a .15uF cap. There's no way you'll trip a 100A main breaker with 2 mots.
Well, with a .05 uf capacitor and no more than 400bps rsg i am hoping not to trip a 20 amp breaker. Think it would work out like that?
That (slightly less than) 100A was on 240V btw, measured with clamp meter.
I think you'll be pushing it a little bit, but I think the breaker will hold long enough for you to run the coil for short runs.
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Big 6 inch coil.
