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Old 16-02-2020, 16:21   #1
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AVR for Mase generator

I have a Generator Mase IS 3.8-4.5 joined to a Yanmar single stroke .All goes well until It leave to generate 220 volts .Checking all the connection and wires I concluded that the square AVR fail and start my history .As an older generator ,around 1990 , is almost imposible to find a replacement and service manual.
It have two condensor with a label 400V,220 micro farad and other unknown number 3486( M) .
Really appreciate if somebody have any suggestion for where I can find a spare part.
Regards Hernan
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Old 16-02-2020, 18:10   #2
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Re: AVR for Mase generator

You need to check both the capacitors with a multi meter. I’m not familiar with the live end of this small Mase but in the parts book they only show the capacitors, no AVR. There is a square regulator for the DC from the belt driven alternator that you need to test as well.
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Old 16-02-2020, 19:19   #3
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Re: AVR for Mase generator

Thanks for your fast answer , i can’t check the capacitará because it’s are inmerso in resina . The alternador it’s fine
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Old 16-02-2020, 19:36   #4
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Re: AVR for Mase generator

Ok , your 4.5 Mase must be different to the model in my parts manual, it shows a single large capacitor about 125mm long. Are your 2 capacitors on an AVR board? Is it possible to test across the terminals ?
If you have an AVR that has failed, I think you need to find a generator electrician to test the health of the generator before just plugging in a new board.
Also..... be very careful poking around with a multimeter in the control box if the engine is running
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Old 17-02-2020, 12:17   #5
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Re: AVR for Mase generator

Hello,
You could find all docs on
Old literature - Mase Marine Generators of North America - Gen Set generators Yanmar Marine engines
Click on blue link and download
Good luck
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Old 17-02-2020, 14:15   #6
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Re: AVR for Mase generator

we had a similar problem with our mase generator. turned out it was the capcitor needed replacing. $2- part...easy

good luck

cheers,
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Old 25-02-2020, 18:29   #7
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Re: AVR for Mase generator

Thanks Roland and Chrisr for your info.Chrisr , could you give me more information and where you Bought tje avr .My aver is square tipe with 2 condensor .
Thanks to both
Hernan
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Old 25-02-2020, 21:37   #8
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Re: AVR for Mase generator

Quote:
Originally Posted by surazo View Post
Thanks Roland and Chrisr for your info.Chrisr , could you give me more information and where you Bought tje avr .My aver is square tipe with 2 condensor .
Thanks to both
Hernan
actually the electrician supplied the part. i'm not sure where he got it from, but must have been easy as recall was same or next day. $2 part...but $100 or so labour to find the fault.

here is a pic of my capacitor
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cheers,
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Old 25-02-2020, 22:15   #9
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Re: AVR for Mase generator

Take your capacitor (condensor) to a shop that repairs electric motors, or maybe appliances (laundry machines, pumps, these kinds of things). The same capacitors are used many times with single-phase motors for either "start" capacitors or "run" capacitors. They are very common, I have found them in some very remote ports because they are used in many things.

It would be best if you can find one exactly the same, but:

It does not matter if the voltage is higher (440V, 600V, etc.). In fact this will be better. If the voltage is lower you could probably be OK to 330V or about so. It will not last as long, but maybe until you get to a bigger city.

If the capacitance changes you will change the voltage of the AVR. Probably OK 200-240uF or so, the more you are different from the original the more the AVR voltage will change.

If your location is correct:

condensador de marcha or capacitor de marcha and condensador/capacitor de arranque

If you cannot find one capacitor of 220uF you can add capacitors in parallel, so 120uF + 100uF would be OK.

Also, do not worry too much about shape, as long as you can fit it into the box the exact shape is not important, only the ratings.
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Old 26-02-2020, 06:11   #10
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Re: AVR for Mase generator

Thanks Crisr.I will try to find it considering the advises of Dundurill . My main problem is the ignorance about AVR .
I found one with 250 volts with only one condensor of 220 microfarad . It could be useful ¿. Which could be the range for this variables ¿
Thanks and appreciate your time and patience
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Old 26-02-2020, 06:17   #11
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Re: AVR for Mase generator

Sorry Dsanduril. I included in my quick replay .
Who means the volts and microfarad and which could be the value range considering a current generated of 220 volts .
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Old 26-02-2020, 08:55   #12
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Re: AVR for Mase generator

Your generator is 220V? That means the peak voltage is 220*1.414 = 311V. For 230V this works out to 330V, so that is the minimum voltage rating you should have - 330V DC.

If the capacitor has a rating of 250V AC then it may be OK, but most capacitors are labeled for DC/peak, and so you need something rated for 330V or higher. Check the label to see if it is rated DC or AC.

If though, it is the only one you can find then it may work for a short time even if it is only rated for 250V AC. It will fail soon, so get a higher voltage ordered if you can.

One other place that uses many of these capacitors is air conditioning equipment.
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Old 26-02-2020, 17:48   #13
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Re: AVR for Mase generator

Really Thanks . Your note is clear .Unfortunately I can't find any other square AVR with high rating .I check the avr found and isn't clear if is 250 v DC or AC .The other issue that I Noted is it don't have any thermal dissipation for the moffet .
As you notice I'm learning in the practice and I don't have more knowledge about generators .Any suggestion where I can find an avr for monofasic 220 volts 4.5 KW with capacitor around 400 v with 220 microfarad .
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