MEP-1050 3 Phase To Single Phase

Hello genset experts,

We got a MEP 1050 from GovPlanet that is 3three phase and recently we had a licensed electrician come out to give us an estimate on the cost of hooking it up to our home. He said we need to switch the MEP-1050 from three phase to single phase and I do not know how or even if this can be done. I sent him this thinking it was what he wanted but he told us it was not:



I have another thread here called MEP-1050 Fault Code 3665 - https://steelsoldiers.com/threads/mep-1050-fault-code-3665.224125/ - where I am still trying to solve our fault code 3665, but there is other information there and photos in cxase it helps.

Thank you

Of the drawing is accurate in the head being 12 lead it is absolutely possible. Problems I foresee are the monitoring circuits in the generator getting pissy.

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Scoobyshep said:

Problems I foresee are the monitoring circuits in the generator getting pissy.

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@Scoobyshep - Are CT1, CT2 and CT3 the monitoring circuits?

BadAmish said:

@Scoobyshep - Are CT1, CT2 and CT3 the monitoring circuits?

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Only for current draw. There should be something metering the voltage output as well

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Scoobyshep said:

There should be something metering the voltage output as well

Click to expand...

@Scoobyshep - Could that be CT4?

BadAmish said:

@Scoobyshep - Could that be CT4?

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No. Ct stands for current transformer (or transducer depending on circumstances). Ct4 here is monitoring the current for the convenience outlet

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Looks like the DCS monitors the AC Voltage at K1-A1, K1-B1 & K1-C1 to monitor the gen head output voltage referred to as the GENSET Voltages.
I'd assume the DCS uses the GENSET Voltages as inputs to the AC Voltage Regulator system in the DCS.
The DCS also monitors the AC Voltages at the output lugs referred to as the BUS Voltages.

Good Day: Two members have it on the head of the nail. The monitoring circuits are looking for 3 phases and S12 is set for a 1050 which is a 3 phase machine.. You have 52 AMPS per phase on the 3 phase machine which if you use only 2 phases, you have your 120/240VAC with 52 AMPS each to neutral. The issue here is if you do not put a load of some kind on the unused phase you will be running unbalanced and this causes issues after a time. This one made me do the scratchy head trick and here is bit of knowledge few know. The MEP 1050 and the MEP 1040 : the only difference is one cylinder in the engine and the S501. Same monitoring with the exception of an S501 where the DELTA strapped main gen is monitored. Same main gen, same DCS, one cylinder in the engine more on the 1050, but I do not have in my head where to find what makes and monitors what as the S501 is rotated. I do not have a switch so I can not for certain say what to connect to what. You just set the S12 on the A2 card to say it is a MEP-1040 after making the main gen a DELTA with the 501 and the monitoring connected correctly as a 10KW. Then you have about 73 AMPS per phase at 120/240 and the DCS will say you are over loading the gen which is a matter of CT1-CT3 value change . Then the DCS will see a 120/240V connected and allow the gen to start. Other than removing the reconnect board and installing an S501 and wiring it up as a 1040 10KW I can't figure any other way because I do not have the info of how the S501 connects internally. A couple in the forum may be able to figure that one out but CT values must also change or use INPOWER AMMPS to change the values in the programming using a LAPTOP. Sorry, I am unable to come up with an exact answer as we were trying to keep them running as designed.