JohnMcNutt
Industrial
- Mar 3, 2013
- 112
Folks,
We have found a pattern failure in SE350 AVRs on Marathon generators with 3 cylinder diesels. They appear to be the same as the Basler units listed in the title so wondering if Basler is the manufacturer of all of them.
Units of all different ages and engine brands have done it.
What happens is that the output voltage becomes extremely frequency dependent.
Changing the UFRO pot has no effect when the failure is occurring. It can be run from min to max and voltage remains constant.
Slight adjustment to engine speed will send the voltage up or down proportionally even though the engine is running very close to 60 Hz. Like a few tenths of a cycle.
The voltage pot will still be functional although somewhat sensitive.
Calls to Marathon yielded a lot of talking but of course we were the only ones that ever had this problem, however it seems widespread to us.
Thoughts?
We have found a pattern failure in SE350 AVRs on Marathon generators with 3 cylinder diesels. They appear to be the same as the Basler units listed in the title so wondering if Basler is the manufacturer of all of them.
Units of all different ages and engine brands have done it.
What happens is that the output voltage becomes extremely frequency dependent.
Changing the UFRO pot has no effect when the failure is occurring. It can be run from min to max and voltage remains constant.
Slight adjustment to engine speed will send the voltage up or down proportionally even though the engine is running very close to 60 Hz. Like a few tenths of a cycle.
The voltage pot will still be functional although somewhat sensitive.
Calls to Marathon yielded a lot of talking but of course we were the only ones that ever had this problem, however it seems widespread to us.
Thoughts?