Need help selecting an inverter [RE-wrenches]

[Darryl Thayer]

Hello, 
Two people have contacted me off group and asked if I
had relay dropout during starting the seven hp motor. 
There are three electrically self latching relays
(contactors/motor starters) that when energized hold
in by current through the aux contacts.  I tried
several configurations, and in no case did the other
contactors drop out when starting the seven HP motor. 
I will try to investagate further, as I did not think
of this at all. Does anyone know how long a contactor
can be with out power before it drops out?
 
--- Darryl Thayer <daryl_solar at yahoo.com> wrote:
> Date: Fri, 24 Oct 2003 08:10:49 -0700 (PDT)
> Hello to all
> And thanks for the help
> When I asked this back in September, I had a 2
> stacked SW5548 inverter system that would not  
> reliable start a large pump. (it kicked out on 
> overload) Many replied that I needed an Outback
> three stack or four inverter stack.  
> 
> The back ground load was from 2 to 25 amps When the
> pump started the pump surge was 130 amps on grid,
> and 30 amps running. The pump runs less than a
> minute.  
> 
> Success! I installed a Outback Quad stack, VFX3648
> the installation looks good and functions
> perfectly.  I started the pump from several 
> conditions, never failed once. The amazing thing to
> me is to see the system with one inverter running,
> the 7 hp pump start and the system immedatly has
> all four inverters running.  
> 
> One strange thing, the surge on line power is 130
> amps, by my peak hold greenlee clamp on.  When I
> start from the inverters the peak hold is only 100
> amps?  Strange because you can not tell the 
> difference in the pump starting!
> Thanks to all
> Daryl
> 

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