how to test 48v AC coil on a wind turbine
ldiorio
Solar Expert Posts: 48 ✭✭
have a thermodyne 48ac 3 phase turbine--i had to take it apart to repl the rotor shaft bec the nut came loose ---i assebled it with the new rotor but not getting anyvoltage from it
how do i test the coil to see if that is the problem
--i did use a continuity meter on the 3 output wires and get continuity on all 3--testing 2 at a time
does continuity between the output wires mean that the coil is bad or is tht normal
thanks
lou
i only get .5 to .8 volts when i test the leads
how do i test the coil to see if that is the problem
--i did use a continuity meter on the 3 output wires and get continuity on all 3--testing 2 at a time
does continuity between the output wires mean that the coil is bad or is tht normal
thanks
lou
i only get .5 to .8 volts when i test the leads
Comments
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I think you use an insulation meter. Only way I know this is having purchased one for resale...lol. NOT fishing. I think I'll put it on eBay. When I went to buy a Fluke clamp meter from a guy who was doing maintenance on big turbines. He said he'd throw in the insulation meter if I'd buy the Multimeter! All Fluke's all in new shape. he got a new meter each year from company and just used his old ones! I asked what it was used for and I believe he told me it was for testing coils in turbines. Might ask the company about testing points and expected readings. If you are in Missouri I would be glad to let you borrow one. I'm in central, but have plans for trips to KC and St. Louis and a pool tourney north of Marshal.
Home system 4000 watt (Evergreen) array standing, with 2 Midnite Classic Lites, Midnite E-panel, Magnum MS4024, Prosine 1800(now backup) and Exeltech 1100(former backup...lol), 660 ah 24v Forklift battery(now 10 years old). Off grid for 20 years (if I include 8 months on a bicycle).
- Assorted other systems, pieces and to many panels in the closet to not do more projects. -
tks for the info--going to take the tower down today and make sure its not the wiring
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ldiorio said:have a thermodyne 48ac 3 phase turbine--i had to take it apart to repl the rotor shaft bec the nut came loose ---i assebled it with the new rotor but not getting anyvoltage from it
how do i test the coil to see if that is the problem
--i did use a continuity meter on the 3 output wires and get continuity on all 3--testing 2 at a time
does continuity between the output wires mean that the coil is bad or is tht normal
thanks
lou
i only get .5 to .8 volts when i test the leads
Are any of the coil wires shorted to the frame?
Should be infinite ohms from any phase lead to the metal case.
You can test this with a normal volt-ohm meter on highest ohms setting (keep your fingers off the test leads)
You said, "I only get 0.5 to 0.8 volts when I test the leads".
I interpret that as meaning: "when the rotor is spinning at a normal speed the generator produces only 0.5 to 0.8 volts between any to output wires". When you get it down from the tower, try spinning rotor with a Cordless Drill then measure volts and amps between all three phases.
3 quick tests ...
Connect L1 to L2 - does that cause cogging / loading when spinning the rotor ?
Connect L2 to L3 - does that cause cogging / loading when spinning the rotor ?
Connect L3 to L1 - does that cause cogging / loading when spinning the rotor ?
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