Voltage Regulator Retrofit for Onan Genset
Voltage Regulator Retrofit for Onan Genset
(OP)
I have an old Onan genset with a failed voltage regulator board. External SCRs driven by regulator are also defective. Rest of excitation system tests ok.
The existing regulator is a VR21, which is still available from the mfg however is very expensive relative to the value of the genset.
Am looking at retrofitting a different, more cost effective AVR. Have contacted our local Basler dealer, however I am having difficulty getting any help.
This unit is self excited and rated 60 kw, 600V, stand-by (used for prime power in a sand and gravel pit). Exciter field resistance is 20 ohms. I do not have full load excitation data unfortunately. It is not listed in the service manual nor on the gen data plate.
Looking at Basler's AVR selector chart (attached), I am thinking the AVC63-4 would be suitable. The only thing I am unsure about is the rated excitation voltage and current, which I do not know. Advice?
The existing regulator is a VR21, which is still available from the mfg however is very expensive relative to the value of the genset.
Am looking at retrofitting a different, more cost effective AVR. Have contacted our local Basler dealer, however I am having difficulty getting any help.
This unit is self excited and rated 60 kw, 600V, stand-by (used for prime power in a sand and gravel pit). Exciter field resistance is 20 ohms. I do not have full load excitation data unfortunately. It is not listed in the service manual nor on the gen data plate.
Looking at Basler's AVR selector chart (attached), I am thinking the AVC63-4 would be suitable. The only thing I am unsure about is the rated excitation voltage and current, which I do not know. Advice?





RE: Voltage Regulator Retrofit for Onan Genset
The Kutai types are ok too, but they're repair-proof just like the big-name designs they copy.
RE: Voltage Regulator Retrofit for Onan Genset
RE: Voltage Regulator Retrofit for Onan Genset
I have used their products in the past to repair Onan and other generators.
Mike L.
RE: Voltage Regulator Retrofit for Onan Genset
RE: Voltage Regulator Retrofit for Onan Genset
Then I bought the Flight System replacement pcb and have had zero problems since (about 1995). My vote: Go for it.
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