catienla
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MEP004 producing 87 volts on all three phases. Was 125 volts last time I ran it. Regulator rebuilt relay box repaired. Any ideas?
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MEP004 low voltage
- Thread starter catienla
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Scoobyshep
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Are you still using the original exciter avr?
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Where are you taking your measurements from?
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For beginners,
I would check R2 and S5 and R31
The next question would be:
Was this Generator converted to Single Phase (@sewerzuk) ?
If so, make sure you adjust R2 Voltage Adjust Rheostat to 208 VAC across the two phases ( L1 and L3) and not 240 VAC or higher!
The A11, repaired or original, was designed for 208 VAC
When you adjust to 240 VAC then J13 M and L are too high. T2 Primary connects here and 240 on primary will put out 138 VAC on secondary.
Further, CT4 CT5 and CT6 are going to be in a imbalanced state after swerzuk's conversion.
All three CT's are connected to a Three Phase Transformer T1 and directly to CR 1, 2, 3, 4, 5 and 6, which form the Boost Circuit with Q5 and VR3 on the Voltage Regulator Board inside the A11
I would check R2 and S5 and R31
The next question would be:
Was this Generator converted to Single Phase (@sewerzuk) ?
If so, make sure you adjust R2 Voltage Adjust Rheostat to 208 VAC across the two phases ( L1 and L3) and not 240 VAC or higher!
The A11, repaired or original, was designed for 208 VAC
When you adjust to 240 VAC then J13 M and L are too high. T2 Primary connects here and 240 on primary will put out 138 VAC on secondary.
Further, CT4 CT5 and CT6 are going to be in a imbalanced state after swerzuk's conversion.
All three CT's are connected to a Three Phase Transformer T1 and directly to CR 1, 2, 3, 4, 5 and 6, which form the Boost Circuit with Q5 and VR3 on the Voltage Regulator Board inside the A11
catienla
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L1 to ground 87 volts, L2 to ground 87 volts, L3 to ground 87 volts. Across L1 and L3 154 volts.
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@catienla
Mike, you need to post of what you are emailing me here as well. Otherwise, everyone is in the dark and we cannot help you.
Mike wrote via e-mail as he had e-mailed me before he posted this thread:
Mike:
My Answer
Voltage Adjust Rheostat on front panel. Is this Genset converted to 1 Phase?
Mike's Answer
Thanks for your reply. Genset is not converted, using L1 and L3 for 220v. Rheostat doesn't change voltage on panel meter. Maybe I should have turned it and checked with a meter.
Mike, you need to post of what you are emailing me here as well. Otherwise, everyone is in the dark and we cannot help you.
Mike wrote via e-mail as he had e-mailed me before he posted this thread:
Mike:
| Tried to run MEP004. It is only producing 87.5 volts on all 3 phases. Is there a way to adjust the voltage higher? When I ran it after last repair I measured 25 |
My Answer
Voltage Adjust Rheostat on front panel. Is this Genset converted to 1 Phase?
Mike's Answer
Thanks for your reply. Genset is not converted, using L1 and L3 for 220v. Rheostat doesn't change voltage on panel meter. Maybe I should have turned it and checked with a meter.
catienla
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I think sometimes my mind is my worst enemy. I have been running this unit on two leads voltage at 220 vac since 2011, maybe this is why all my problems started. I knew it was 208 v but it did not register. When it produced 220-230 v this is what I used. I think I created my own problems. I'll check the circuits Peter listed and reply. Thanks to everyone for your help. I need it.
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