mep-004 voltage regulator/exciter

[catienla]

Who can repair a voltage regulator for a mep-004? Cr 7 and cr8 diodes burnt ,cr22 and a couple of others don't look healthy. It's a new year and still working on the generator. Thanks, Mike

 

[jamawieb]

Who can repair a voltage regulator for a mep-004? Cr 7 and cr8 diodes burnt ,cr22 and a couple of others don't look healthy. It's a new year and still working on the generator. Thanks, Mike

Have you considered getting rid of the entire box and updating to a newer design. I did a write up on a retrofit voltage regulator for the 004/005. I have several thousand hours on a advr-054 and a marothon se-350 voltage regulator.

 

[jamawieb]

(11) MEP-004a or 005a voltage regulator | SteelSoldiers

 

[catienla]

Have you considered getting rid of the entire box and updating to a newer design. I did a write up on a retrofit voltage regulator for the 004/005. I have several thousand hours on a advr-054 and a marothon se-350 voltage regulator.

How difficult is the change over? I am no where near an elecrician.

 

[jamawieb]

How difficult is the change over? I am no where near an elecrician.

Super easy. The newer voltage regulators have 4 wire hookup. 2 for the exciter and 2 sensing wires. For the 2 exciter wire hookup, you just attach those to the wire block that is mounted right behind your VR box now. Then run your sensing wires to the reconnection board or the contactor of 2 hot legs. Finally to excite the field you will need to add an excitor push button. You will need a momentary push button, i used a 56 ohm resistor and 5406 diode. Hook one side of the switch to 24v, i bumped off the 24v circuit breaker at the front panel, then the other side goes to f1 excitor hookup which is the same location the new voltage regulator hooks to

 

[catienla]

Super easy. The newer voltage regulators have 4 wire hookup. 2 for the exciter and 2 sensing wires. For the 2 exciter wire hookup, you just attach those to the wire block that is mounted right behind your VR box now. Then run your sensing wires to the reconnection board or the contactor of 2 hot legs. Finally to excite the field you will need to add an excitor push button. You will need a momentary push button, i used a 56 ohm resistor and 5406 diode. Hook one side of the switch to 24v, i bumped off the 24v circuit breaker at the front panel, then the other side goes to f1 excitor hookup which is the same location the new voltage regulator hooks to

You mentioned two components advr-54 and se-350 do I need both?

 

[jamawieb]

You mentioned two components advr-54 and se-350 do I need both?

They are 2 different VR's i have used.

 

[catienla]

Are the diode and resistor for the exciter circuit in the old box ?

 

[jamawieb]

Are the diode and resistor for the exciter circuit in the old box ?

You will need to buy the resistor, diode, momentary switch, connectors and wire for the conversion.

 

[catienla]

You will need to buy the resistor, diode, momentary switch, connectors and wire for the conversion.

Can you give a detailed hook-up of the resistor,diode and switch? Positions in circuit?

 

[jamawieb]

Im out of town for the next week but when i get back i will.

 

[catienla]

Im out of town for the next week but when i get back i will.

Thanks for all your help.

 

[catienla]

Thanks for all your help.

Sorry to pester you. The 56ohm resistor wattage and % I don't know. There are several different ones on Ebay. I am assuming the 5406 diode is 3- amp 600 volts. Does the resistor or diode need to be first from the switch? Ordered the Advr-054. If you can help me with the two other parts/questions, I'll try to let you be. Thanks, Mike

 

[jamawieb]

Sorry to pester you. The 56ohm resistor wattage and % I don't know. There are several different ones on Ebay. I am assuming the 5406 diode is 3- amp 600 volts. Does the resistor or diode need to be first from the switch? Ordered the Advr-054. If you can help me with the two other parts/questions, I'll try to let you be. Thanks, Mike

Don't worry to much about the exact model of the resistor, but you want to stay in the 50-60 ohm range. Search ebay Dale CW-10 56 ohm. They have some cw-10 50ohm 13 watt. All your wanting to do is reduce the current to the F1 exciter. I went from the switch, to the resistor, then immediately to the 5406 diode, finally to the stud of F1. The resistor reduces current and the diode keeps the current going in the correct direction. On the diode, make sure you put it in the correct direction, it will have a gray stripe on the diode, that gray strip needs to be on the end that will connect to F1. Just in case you didnt know.