[RE-wrenches] inverters/ generators and noise

[jay peltz]

Hi Bob,

Thanks for the details.

I'll let you know about how this goes.

Customer was being super careful to have it as close to 60hz as  
possible.

Hope this doesn't freak him out!

jay
On Nov 20, 2008, at 8:26 AM, robert ellison wrote:

> Seems that i ran it up till the charger was happy and it was not  
> over 62 or 63 HZ. Some people on the list would scream but I never  
> had a problem doing it and never blew anything up. Set it for 62 or  
> 63 unloaded and see where it settles with a full charger load on it.  
> Some will not increase, just put it back where it was.
> I always figured that low was worse than high. Not a good idea to  
> crank up a Coleman or other cheap generator and unload it fast. I  
> know people that have blown capacitors when they do that.
> I have not had to do that with the Magnum inverter / chargers, they  
> seem to be happy on less amps ac input Heart Interface (dating  
> myself, remember them?), Trace and Outback seemed to like a little  
> frequency increase.
>
> Later,
> Bob.
>
> On Thu, Nov 20, 2008 at 11:10 AM, jay peltz <jay at asis.com> wrote:
> Hi Bob,
>
> Do you have any numbers as to what the HZ where or where you think  
> it worked best?
>
> thanks,
>
> jay
>
> peltz power
>
> On Nov 20, 2008, at 3:38 AM, robert ellison wrote:
>
>> Probably due to the load of the charger, try changing the rpm a  
>> little (higher) if you can. Might help. I have had stoves that  
>> wouldn't light under full charger load. They did better at a  
>> somewhat higher rmp (frequency)
>>
>> Bob
>>
>> On Thu, Nov 20, 2008 at 12:12 AM, jay peltz <jay at asis.com> wrote:
>> Hi All,
>>
>> here is along those same lines a question about line noise.
>>
>>
>> System 15kw diesel generator
>>
>> 4 stack outback at 24v   120v/240vac
>>
>> 3000 amp hr industrial batteries.
>>
>> when genny running, 59.5-60 hz
>> voltage 122/244
>>
>>
>> Symptoms.
>>
>> when charging there is some buzzing on some electrical equipment in  
>> the house.  Stove pizeo won't lite, transformer on furnace runs  
>> hot, Fridge makes more noise.
>> Seems to get worse at end of charge cycle.
>>
>>
>> Now, with inverter only,  no noise, humm, buzz etc.
>>
>> With Genny only no buzz, humm, etc.
>>
>>
>> Any advice?
>>
>> thanks,
>>
>> jay
>>
>> peltz power
>>
>>
>>
>>
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