Another MEP 006a/105a love hate relationship!

[Sentinel 9]

Good morning all.
Has anyone successfully used an aftermarket AVR (auto voltage regulator) on an MEP 006A? I am done with the old regulator exciter box issues.
Someone told me they used a basler avc 63 -4 but its only firing up 2 of the 3 legs.
If this has been answered or addressed before, please point me in the right direction. Thank you all.
9

 

[Scoobyshep]

I have used aftermarket on a 004 and 005. A 006 shouldnt be too difficult.

Can you clarify your comment on 2 of 3 legs? if you have excitation the whole head should be putting out power.

 

[Sentinel 9]

There is no power on 1 of the 3 phases. Top lug. The avr sense lines a connected to the other two legs and they are generating power. I assumed because the avr is meant for single phase, it will only produce power on two phases only and not the 3.

 

[Scoobyshep]

That's not how it works.

In general, an Ave only needs to see voltage and it regulates the voltage by adjusting the magnetic field. The windings all see the same field and create voltage. Where are you metering it? There may be a bad connection between the head and that point or you have a bad winding, or someone changed how the head is tapped.

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[Sentinel 9]

That's not how it works.

In general, an Ave only needs to see voltage and it regulates the voltage by adjusting the magnetic field. The windings all see the same field and create voltage. Where are you metering it? There may be a bad connection between the head and that point or you have a bad winding, or someone changed how the head is tapped.

Sent from my SM-S908U using Tapatalk

1 How can i check to see if the winding is faulty?
2 are there diodes in those 006as that can go faulty and cause the winding not to produce power?

 

[Scoobyshep]

There are diodes but they are on the rotor, their failure would not cause a loss of 1 leg.

Check it at the voltage reconnecton board. Let me know what you have between the following:
T1 to T2
T2 to T3
T3 to T1
T1 to T12
T2 to T12
T3 to T12

I assume you have a multi meter and are comfortable using it?

Sent from my SM-S908U using Tapatalk

 

[Sentinel 9]

There are diodes but they are on the rotor, their failure would not cause a loss of 1 leg.

Check it at the voltage reconnecton board. Let me know what you have between the following:
T1 to T2
T2 to T3
T3 to T1
T1 to T12
T2 to T12
T3 to T12

I assume you have a multi meter and are comfortable using it?

Sent from my SM-S908U using Tapatalk

What i am checking for voltage with unit running. Or continuity resistance with unit not running.?

 

[Scoobyshep]

Voltage with the set running.

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[Sentinel 9]

There are diodes but they are on the rotor, their failure would not cause a loss of 1 leg.

Check it at the voltage reconnecton board. Let me know what you have between the following:
T1 to T2
T2 to T3
T3 to T1
T1 to T12
T2 to T12
T3 to T12

I assume you have a multi meter and are comfortable using it?

Sent from my SM-S908U using Tapatalk

I did the test. Results as follows:
T1. To T2. 124.8 volts
T2 to t3. 216.4 volts
T3 to t1. 127.2 volts
T1 to t12. 2.4 volts
T2 to t12. 124.7 volts
T3 to t12 124.9 volts

Continuity. T1 to t4 only
T2 to T 3,5,6,7,8,9,10,11,12
T3 to T 2,5,6,7,8,9,10,11,12.
I just want to say, i truly appreciate your input in this matter.

 

[Sentinel 9]

There are diodes but they are on the rotor, their failure would not cause a loss of 1 leg.

Check it at the voltage reconnecton board. Let me know what you have between the following:
T1 to T2
T2 to T3
T3 to T1
T1 to T12
T2 to T12
T3 to T12

I assume you have a multi meter and are comfortable using it?

Sent from my SM-S908U using Tapatalk

 

[Scoobyshep]

Something is open. Since the reconnecting board is where the head gets terminated, it's either on the back side of the board or in the head. Check the wiring from the head (look for 12 large wires). Follow them from the head to the board. Check for damage for a bad connection on the board.

 

[peapvp]

@Sentinel 9
Have you or someone else tried to convert this 006 to single phase as shown in the videos of one of our esteemed members YouTube video(s)?

 

[Sentinel 9]

Hi all,
These are some of the better moments in life when a group of people can take the time out to share and give of their time and technical experience to help others solve problems. Thank you.

 

[Sentinel 9]

Something is open. Since the reconnecting board is where the head gets terminated, it's either on the back side of the board or in the head. Check the wiring from the head (look for 12 large wires). Follow them from the head to the board. Check for damage for a bad connection on the board.

Problem solved.

I mapped out the windings (draw label according to parallel star.) Started testing each winding. All windings checked out. Then proceeded to continuity test the connection between the windings.
3 terminal on the voltage config board was corroded and 1 of the 3 was loose. Cleaned, new lock nuts and fired it up. The old bird came to life on all legs. Thank you Scoobyshep

 

[Sentinel 9]

@Sentinel 9
Have you or someone else tried to convert this 006 to single phase as shown in the videos of one of our esteemed members YouTube video(s)?

No it was not converted. 3 phase 120/208v

 

[Guyfang]

TB1 is the most forgotten thing on the gen set. No one looks there, unless its on fire.

 

[Scoobyshep]

Problem solved.

I mapped out the windings (draw label according to parallel star.) Started testing each winding. All windings checked out. Then proceeded to continuity test the connection between the windings.
3 terminal on the voltage config board was corroded and 1 of the 3 was loose. Cleaned, new lock nuts and fired it up. The old bird came to life on all legs. Thank you Scoobyshep

Glad it was something simple. Happy to help