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802A has lower than normal voltage, how can I correct this?

E

ECS

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My "new" 802 with only 117 hours has lower than normal voltage.

Could someone please tell me how to correct this?

When I am Using the adjustment knob the Low setting has 180 volts (turned all the way counter-clockwise) ; Middle has 200 volts; Highest has 210 volts. This is set to run single phase 240 volts.

Frequency is set with the rpm to 60 Hz fine.

Thanks
 
C

Coug

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ECS said:
Good point, no I didn't .. I'll check it tomorrow. Thanks !
Click to expand...
yup, first step is always verify where the issue is, because military gauges are mostly there just to give you an idea of what it's doing, and you only worry when it's different than you are used to.

The TMs for this unit are all here:

MEP-803A, All the TM's you need

This should be all the TM's and additional information you need to work on the MEP-803A
www.steelsoldiers.com


If the gauge is correct but voltage is low, I would look at the voltage regulator itself as being a possible issue.
Someone else can chime in if I am wrong, but in all of my working with generators I've never come across one that the voltage output was at about 80% of rated output where it was a failed gen head. Also very unlikely it's a bad wire connection, though I suppose that is possible as well.

Looking around, somewhere I read that there is also a voltage adjustment potentiometer inside the voltage regulator as well as the one on the control panel, and in one case that was the issue, fixed by using a little Deoxit in that potentiometer, letting it soak, and working it for a bit.
That was this thread:

Quirky MEP-803 voltage regulator ?

Yesterday I started up my 803A just to circulate some oil and I noticed that the voltage was reading 220v and I had just ran it a month ago and it was set at 240v. I attempted to adjust the knob and could only get it to 230v before hitting the limit of the knob. After a few attemps at adjusting...
www.steelsoldiers.com


If it comes down to replacing the voltage regulator (or you just want a spare on hand) in the classifieds section there are some replacement regulator setups being sold by kloppk.

MA - MEP-802A, MEP-803A AC Voltage Regulator

MEP-802A & MEP-803A Voltage Regulators Replaces TRC 19580 88-21063 6110-01-363-0492 Features include: · Replacement for your defective or missing Voltage Regulator... or to have a spare on hand · Works in generators that have defective Quad Windings! · Supports the 802/803's Field Flashing...
www.steelsoldiers.com
 
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D

dav5

Active member
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Mono, Ontario
Coug said:
yup, first step is always verify where the issue is, because military gauges are mostly there just to give you an idea of what it's doing, and you only worry when it's different than you are used to.

The TMs for this unit are all here:

MEP-803A, All the TM's you need

This should be all the TM's and additional information you need to work on the MEP-803A
www.steelsoldiers.com


If the gauge is correct but voltage is low, I would look at the voltage regulator itself as being a possible issue.
Someone else can chime in if I am wrong, but in all of my working with generators I've never come across one that the voltage output was at about 80% of rated output where it was a failed gen head. Also very unlikely it's a bad wire connection, though I suppose that is possible as well.

Looking around, somewhere I read that there is also a voltage adjustment potentiometer inside the voltage regulator as well as the one on the control panel, and in one case that was the issue, fixed by using a little Deoxit in that potentiometer, letting it soak, and working it for a bit.
That was this thread:

Quirky MEP-803 voltage regulator ?

Yesterday I started up my 803A just to circulate some oil and I noticed that the voltage was reading 220v and I had just ran it a month ago and it was set at 240v. I attempted to adjust the knob and could only get it to 230v before hitting the limit of the knob. After a few attemps at adjusting...
www.steelsoldiers.com


If it comes down to replacing the voltage regulator (or you just want a spare on hand) in the classifieds section there are some replacement regulator setups being sold by kloppk.

MA - MEP-802A, MEP-803A AC Voltage Regulator

MEP-802A & MEP-803A Voltage Regulators Replaces TRC 19580 88-21063 6110-01-363-0492 Features include: · Replacement for your defective or missing Voltage Regulator... or to have a spare on hand · Works in generators that have defective Quad Windings! · Supports the 802/803's Field Flashing...
www.steelsoldiers.com
Click to expand...
Kurt's regulator are very high quality as is everything else he manufactures.
 
R

Ray70

Well-known member
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West greenwich/RI
IF both switches are set correctly ( 120/240 on the switch inside the control cube and the purple dot shown up above) and you are not reaching 240V on L1-L3 with the adjustment knob all the way up, take a look at your voltage regulator, if there is a 3/16" hole in the front cover, inside that hole is a potientiometer that you can turn a little bit to further adjust your voltage ( assuming the VR is working correctly )
Turn the pot. up a little, than dial the voltage in again with the switch on the control panel.
I have heard that not all regulators have the adjustment Pot accessible through a hole, but I do not know if you can access it by drilling out the rivets on the cover to access the internals.
Kurt might know.
If all else fails... replace the VR with Kurts'
 
E

ECS

Member
87
50
18
Location
Florida
uniquify said:
What's the position of this switch (S6)?

View attachment 836077

To configure the voltage meter (M1) to measure 240 volts single phase, you'll want it on the position identified by the purple spot on the red arc in this picture.
Click to expand...

I feel stupid .. that is what the issues was. Was running 3 phase.

I did check with the meter and the guarge is reading a little low, the the current is good.

Thanks everyone !!!
 
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