electric issues
when i started my onan 4k genset 1 im my class A it smoke the new power converter. any ideas what could cause this problem. it was unplug from shore power prior to starting the generator. only the fri...
Forum Discussion
I stated that my manual shows a transformer regulator not a voltage regulator. I can't read the model number on tag. It's to worn out. I ASKED IF THE VOLTAGE REGULATOR IS THE SAME AS TRANSFORMER REGULATOR. I stated it's in a 1987 emc eldarado
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Transfer relay will not cause a power surge to "smoke" any appliance. Odds are the Genset was either not at correct speed or it has a Voltage regulating problem. Possible voltage regulator if your Genset has one. SPEED (1800 RPMs) is 128 volts no load. If the Genset runs faster than 1800 the 120 voltage increases also. If someone turned the idle screw in to stop a Onan Genset from surging or running rough, that will INCREASE the engine speed and the AC voltage. Doug
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Really need Year of RV and Model of Onan
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It has a transformer regulator. Is this the same as a voltage regulator ?
started about 130 volts then jumped to about 140-147 volt
* This post was edited 03/05/17 06:17pm by robertjhunt *
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My response.
I agree that the speed is proportional with the frequency and output of the generator. For an older genset, you may not have this adjustable feature, thus ,it is fixed, no adjustment.
What catches my attention is when you mentioned transformer regulator. What I find more intriguing is when you read 140-147 volts.
In most cases you don't need a transformer to augment the energy supplied to the RV.
This sounds like someone had added an autotransformer (also known as autoformer in Rver lexicon) The genny may have a chronic intermittent low voltage that prompted this autoformer to be installed.
Auto transformers (autoformers) have taps adjustment or simply auto adjust settings to compensate for any nuances in line voltage. This system works great if you are permanently parked in an area where low voltage is the norm. . . not good or useless if you are in a location that doesn't need a voltage boost.
The downside in the system is when the winding of the transformer has some burned spots. Since it is a single winding transformer (otherwise it won't be called autotransformer), it has a tendency to jack up the voltage because it will approach line voltage to compensate for a bad winding.
Locate this transformer and disconnect either by unplugging or disconnecting the wire if permanently installed. This will not affect the distributed power to the RV. Run your genny and take another reading and see if still shows this higher than normal voltage.
NEC disallows this auto transformers, but RV owners came up with a workaround by having them pluggable instead of hardwired—a loophole they think that outsmart the NEC Code Panel.
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Transfer relay will not cause a power surge to "smoke" any appliance. Odds are the Genset was either not at correct speed or it has a Voltage regulating problem. Possible voltage regulator if your Genset has one. SPEED (1800 RPMs) is 128 volts no load. If the Genset runs faster than 1800 the 120 voltage increases also. If someone turned the idle screw in to stop a Onan Genset from surging or running rough, that will INCREASE the engine speed and the AC voltage. Doug
---------------------
Really need Year of RV and Model of Onan
------------------------
It has a transformer regulator. Is this the same as a voltage regulator ?
started about 130 volts then jumped to about 140-147 volt
* This post was edited 03/05/17 06:17pm by robertjhunt *
-------------------------
My response.
I agree that the speed is proportional with the frequency and output of the generator. For an older genset, you may not have this adjustable feature, thus ,it is fixed, no adjustment.
What catches my attention is when you mentioned transformer regulator. What I find more intriguing is when you read 140-147 volts.
In most cases you don't need a transformer to augment the energy supplied to the RV.
This sounds like someone had added an autotransformer (also known as autoformer in Rver lexicon) The genny may have a chronic intermittent low voltage that prompted this autoformer to be installed.
Auto transformers (autoformers) have taps adjustment or simply auto adjust settings to compensate for any nuances in line voltage. This system works great if you are permanently parked in an area where low voltage is the norm. . . not good or useless if you are in a location that doesn't need a voltage boost.
The downside in the system is when the winding of the transformer has some burned spots. Since it is a single winding transformer (otherwise it won't be called autotransformer), it has a tendency to jack up the voltage because it will approach line voltage to compensate for a bad winding.
Locate this transformer and disconnect either by unplugging or disconnecting the wire if permanently installed. This will not affect the distributed power to the RV. Run your genny and take another reading and see if still shows this higher than normal voltage.
NEC disallows this auto transformers, but RV owners came up with a workaround by having them pluggable instead of hardwired—a loophole they think that outsmart the NEC Code Panel.
