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| Alco RSD1 Voltage Regulator Change https://www.rypn.org/forums/viewtopic.php?f=1&t=43514 |
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| Author: | Alco_539T [ Sat Jul 06, 2019 4:12 pm ] | |||
| Post subject: | Alco RSD1 Voltage Regulator Change | |||
Has anyone swapped the original GE Voltage Type 17LH over to the newer solid state EMD type regulator. I know it was common practice and I really need swap this unstable regulator over to the newer design. What is involved and what all has to be changed? Thanks Jimmy
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| Author: | Alan Walker [ Sat Jul 06, 2019 7:37 pm ] |
| Post subject: | Re: Alco RSD1 Voltage Regulator Change |
You might try contacting Tennessee Valley Railroad Museum. They have years of experience working on RSD-1s and might be able to answer your question. |
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| Author: | Alco_539T [ Sun Jul 07, 2019 5:55 pm ] |
| Post subject: | Re: Alco RSD1 Voltage Regulator Change |
Great Idea! They are only a couple of hours away and I don't know why I didn't think of that! jb |
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| Author: | JKaivo [ Mon Aug 26, 2019 7:05 pm ] |
| Post subject: | Re: Alco RSD1 Voltage Regulator Change |
Were you able to get assistance with this? I successfully converted an S1 to the EMD regulator a few years ago. |
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| Author: | AlcoC420 [ Mon Aug 26, 2019 7:35 pm ] |
| Post subject: | Re: Alco RSD1 Voltage Regulator Change |
Any time you convert to the EMD voltage regulator, you need to protect it with a reverse current rectifier. |
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| Author: | Howard Wise [ Mon Aug 26, 2019 7:47 pm ] |
| Post subject: | Re: Alco RSD1 Voltage Regulator Change |
AlcoC420 wrote: Any time you convert to the EMD voltage regulator, you need to protect it with a reverse current rectifier. Protect what, the field circuit or the power circuit? I have been thinking of adapting one of these to our Krauss Maffei once we get the engine rebuilt. Thanks Howard |
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| Author: | AlcoC420 [ Mon Aug 26, 2019 9:07 pm ] |
| Post subject: | Re: Alco RSD1 Voltage Regulator Change |
Protect you voltage regulator. A company I am working to purchase a couple of locomotives from, recently burned up 3 of these EMD regulators before figuring out they had a problem. |
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| Author: | JKaivo [ Tue Aug 27, 2019 2:11 am ] |
| Post subject: | Re: Alco RSD1 Voltage Regulator Change |
A reverse current relay should do the same thing, opening up the positive feed to the regulator when the engine is shut down. |
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| Author: | robertmacdowell [ Thu Aug 29, 2019 3:14 am ] |
| Post subject: | Re: Alco RSD1 Voltage Regulator Change |
This is the basic way to wire an EMD unit. This drawing shows the auxiliary generator having an armature shunt. It is also simplified, in practice we add gages and an interlock. Attachment: Aux Gen new wiring nogage.png [ 53.92 KiB | Viewed 7309 times ] The fuse values are appropriate for a GE 44-ton. I am not sure whether the diode is required in a single engine situation. The fuse values are appropriate for a GE 44-ton. Any 2-engine application also needs an interlock/contactor to either disconnect the generator or F wire during engine start, so generator 1 doesn't fry trying to help start engine 2. We learned this the hard way. |
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