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Military MEP and Aircraft Gen-Sets

MEP 017A Voltage Issues


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  #1  
Old 12-22-2015, 04:10:23 PM
challengerI challengerI is offline
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Default MEP 017A Voltage Issues

I come seeking guidance, and knowledge...

I have an MEP 017A that will make power on 120v single phase, and 120v 3-phase, but refuses to make power on 240 single-phase and 120/208 3-phase.

I have flashed the genny.

Any one seen this issue before?
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  #2  
Old 12-22-2015, 11:05:58 PM
25Eagle34 25Eagle34 is offline
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Default Re: MEP 017A Voltage Issues

Quote:
Originally Posted by challengerI View Post
I come seeking guidance, and knowledge...

I have an MEP 017A that will make power on 120v single phase, and 120v 3-phase, but refuses to make power on 240 single-phase and 120/208 3-phase.

I have flashed the genny.

Any one seen this issue before?
Have you tried spraying contact cleaner on the selector switch ?
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  #3  
Old 12-23-2015, 10:15:28 AM
challengerI challengerI is offline
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Default Re: MEP 017A Voltage Issues

At present, no. I wanted to get "adult supervision", before I started into something that would create more problems...

Any particular method of spraying the selector?

Thanks!
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Old 12-23-2015, 10:56:26 AM
25Eagle34 25Eagle34 is offline
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Default Re: MEP 017A Voltage Issues

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Originally Posted by challengerI View Post
At present, no. I wanted to get "adult supervision", before I started into something that would create more problems...

Any particular method of spraying the selector?

Thanks!
Just spray the contacts on the selector switch while moving the switch to the different voltage selection--good luck
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Old 12-23-2015, 11:59:45 AM
Isaac-1 Isaac-1 is offline
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Default Re: MEP 017A Voltage Issues

I am not sure about the MEP-017a, but on the MEP-002a there are screws you can loosen on the back of the switch that hold it together that will releive some of the pressure in the switch and help let the contact cleaner get in where it needs to work. Note I said loosen, NOT REMOVE, if you remove them you might never get the switch back together.

Ike
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Old 12-23-2015, 01:52:08 PM
25Eagle34 25Eagle34 is offline
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Default Re: MEP 017A Voltage Issues

Quote:
Originally Posted by Isaac-1 View Post
I am not sure about the MEP-017a, but on the MEP-002a there are screws you can loosen on the back of the switch that hold it together that will releive some of the pressure in the switch and help let the contact cleaner get in where it needs to work. Note I said loosen, NOT REMOVE, if you remove them you might never get the switch back together.

Ike
Amen to your comments Ike, been there, done that, but never again !!
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Old 12-23-2015, 06:15:26 PM
challengerI challengerI is offline
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Default Re: MEP 017A Voltage Issues

Ok, to be clear, I shouldn't have to remove the selector from the genny to clean the contacts?

So, with the genny making rated power on 120 single, and 120 3-phase, yet not making power on 240 single, and 120/208 3-phase, the selector is the likely culprit? Just curious.

Thanks, for the assistance!
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Old 12-24-2015, 04:08:42 PM
cuad4u cuad4u is offline
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Default Re: MEP 017A Voltage Issues

I definitely am no expert on the 017. However as I remember they originally came wired so you could get 120 VAC or 240 VAC but not both. There was a MWO that came out stating how to modify the wiring so you could get 120 and 240. Maybe yours does not have the MWO installed.
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Old 12-24-2015, 07:28:13 PM
challengerI challengerI is offline
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Default Re: MEP 017A Voltage Issues

No, mine is not modified. When the 240v side was working, it had 240v between L-2 and L-3, with no neutral. The 120v single-phase makes the proper voltage as per TM.
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Old 12-24-2015, 09:42:11 PM
challengerI challengerI is offline
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Default Re: MEP 017A Voltage Issues

Gentlemen, I thank you!

Hosed the wire terminals, and seriously soaked the center shaft of the S-1 Phase Switch (couldn't see any other way to get cleaning compound in the switch).
Let the Beastie set for several hours, then cycled the switch several times.
Set the switch on 240v single, and fired her up.

I have power, now!

Thanks, for the leg-up, and the moral support!

Everett
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