MEP 017A wiring

[panzerwillie]

Can anybody give me rewiring instructions to wire this MEP017A not using the military wiring? Like to do it like the low zigzag style, keep in mind i think is a 6 wire GEN 3 phase. I want to wire it to 120/240 single phase thank you. I've seen a lot of old posts but no clear instructions.

[JBittnerSr]

There is no rewiring required. open the control panel and inside there is a rotary selector switch that allows you to select the type of output you want. Do not do this while the gen is running.

[Jim McIntyre]

Wrong.

This set has a 4-position selector switch, but there is no 120/240V position. The settings are 120 3-phase delta, 120/208 wye, 120 single phase, and 240 single phase. The 240 single phase setting does not have a neutral connection available without modification.

The mod is pretty simple, according to the schematic in my TM, S1-2 is the best place to get a neutral, when the set is in the 240V single phase configuration.

[Gunny]

Originally Posted by JBittnerSr

Open the control panel and inside there is a rotary selector switch. Do not switch this while the gen is running.

If you do, the magic smoke will come out.

Smoke being the stuff that makes generators work, if it comes out, they don't work anymore. So smoke must be what makes them work. A good motor shop can usually put it back but it'll cost.

[panzerwillie]

Thank you for all the replys, i adapted this generator part to a YANMAR military Diesel engine and i do not have the control box and i work with this units in the past and have 2 complete running units, if there is a posibility some want can direct me in the direction like wiring a 12 lead unit using the LOWZIGZAG method like for 120/240 using the T-1-7 and the T3-9 for the hot legs and T-4-5-10-11 for neutral and T-2-6-8-12 together would like to use my own VR and gauges this is a 6 lead genset, any help would be great

[Jim McIntyre]

Yes, it's a 6-lead generator. Let me know how these 6 wires are labeled on your generator, and I'll see if I can figure it out for you.

[panzerwillie]

Great i will look tomorrow in the morning i believe they are
T1-6 plus the field wires but will double check in the morning and posted thanks again

[panzerwillie]

Yes Jim i did check this morning and they are label t-1 to t-6 and F-1 and F-2 see if thats the info you need and thanks for your help

[Jim McIntyre]

OK, I'll check. This is the MEP-017 (5kW) head, right?

[panzerwillie]

Yes it is a MEP017A genereator head

[Jim McIntyre]

I'm about 95% sure of this answer. Proceed at your risk. I've done this exact mod on a 3 kW set, but never on a 5 kW.

Step 1. Check this for me. Make sure the 3 windings are T1-T4; T3-T6; and T5-T2.

If that's the case, connect as follows:

Make T1 your L1 connection,
Connect T4 to T3 (nothing else connects to the T4 T3 junction)
Connect T6 to T5 (this is your neutral)
Make T2 your L2 connection.

You should then have a zig-zag with 240 from L1 to L2, and 120 from neutral to either L1 or L2.

F1 and F2 of course are the field input.

For a quick test, spin the machine at 3600 rpm, apply 12 V DC to F1-F2 (polarity is not important), and measure the L1 to L2 voltage along with the L1 to Neutral and L2 to Neutral. The voltages won't be exact, but you should see twice the L-N voltage when you measure L1 to L2. Report back, eh?

[panzerwillie]

Great information jim , now to check the correct winding i need to check with a ohms mwter for the two winding closer to 0 ohms is that correct i think i remenber that using a Simpson 260 with the scale set at RX1 if thats correct also if it works then i guwws i can apply it to MEP016A i several off those thanks againg for all the help

[panzerwillie]

Ok Jim i did the testing for the windings her is what i got
T1 and T4 gave .07 ohms
T3 and T6 gave .06 ohms
T2 and T5 gave .07 ohms
and F1-F2 gave me 55.5 ohms
I tested a runing unit and another generator 5KW {mep-017A}thas going i the yanmar engine I'm almost done with the adaptor and are working on the mounts so it will be a while before i can run it let me know if this is the correct test for the winding thanks

[panzerwillie]

Almost done with the MEP017A generator adaptor to the Yanmar diesel engine will post some pictures here in a day or 2 then i will be able to test the single phase wiring

[Jim McIntyre]

OK. Your resistance readings look good.

[panzerwillie]

Here are some pictures off the set up to change form the herculies engine to the yanmar diesel, got it runing today will test the generator if i can tomorow in a single phase rewiring,
so far so good runs great.

[panzerwillie]

some more pictures

[Gunny]

Looks like you are well on your way to having an operational genset.

Thannks for sharing.

[panzerwillie]

ok jim , i got start it today and ran it up to 3600 rpm and hook up a battery 12 volt to the fields and got on L1 and L2 84.0-85.0 AC volts and to N from L-1 and L-2 = 42.0 AC volts , i have a voltage regulator that works with input of 85-140 AC will try that but not sure if i need to flash it , will let you know later.
thank you

[Jim McIntyre]

Originally Posted by panzerwillie

...ran it up to 3600 rpm and hook up a battery 12 volt to the fields and got on L1 and L2 84.0-85.0 AC volts and to N from L-1 and L-2 = 42.0 AC volts...

That's good news. It is properly wired in zig-zag. The important thing is you see half the L-L voltage from L-N. What voltage regulator are you using? Got a data sheet for it?