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Registered Member #4078
Joined: Tue Aug 30 2011, 12:53PM
Location: Sydney, Australia
Posts: 19
I've managed to convince a large metal scrapyard to let me dig around their piles of transformers for whatever I want (they are the "official" recycler for the local utility). Excellent news...but...
I think most of what's there will be faulty in some way, so quite useless. However I'm hoping that some of the gear comes from decommissioned installations where it's just considered obsolete, not broken.
So i'm looking at suggestions as to how I can do basic tests in the yard before I haul something heavy home for proper testing.
Aside from a continuity check with a meter, what else can I do?
I've had the idea of making a small 12v powered 50Hz h-bridge driver to feed into the low voltage side, and measure the secondary. Are there other or easier ways to test onsite?
Registered Member #4108
Joined: Sun Sept 25 2011, 11:43PM
Location:
Posts: 149
you could check the resistance on the hv primary, although this would be quite a stab in the dark, If you do find a decomissioned transformer, odds are its filled with pcb. witch is fine... until you have to dispose of the transformer!
Registered Member #4078
Joined: Tue Aug 30 2011, 12:53PM
Location: Sydney, Australia
Posts: 19
Cain wrote ...
a HV probe, a battery and a small inverter?
Actually now that you reminded me, I do have a small inverter somewhere. And an HV probe. That after some basic continuity/resistance checking should solve my my problem!
Registered Member #4108
Joined: Sun Sept 25 2011, 11:43PM
Location:
Posts: 149
bwang wrote ...
Pigs are incredibly robust...if you find a pig, chances are its just been decommissioned, not dead.
Except for they like to explode when over loaded past 200% I've seen 1 exlpode in my life time, it was at montivideo MN at a steam show, too much power draw... BOOM!
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Testing pole pigs and other big transformers
witch is fine... until you have to dispose of the transformer!
I've seen 1 exlpode in my life time, it was at montivideo MN at a steam show, too much power draw... BOOM! 
