SW's in marine areas and paralleling with inductive loads. [RE-wrenches]

[Carl Emerson, Free Power Ltd.]

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Hi there gang,

Who at Trace should I contact about the suitability of the SW series in 
a  marine environment.

I have observed rusting on the cases of two units and suspect that the 
electronics have suffered from corrosion.

Also I need advice on the issue of whether inductive loads can upset the 
SWPAR units.  I am concerned about the collapse of inductive fields 
during transfer.

I measured a 2.5 second dip in the supply transferring from generator to 
inverter. The drop was from 235 to 193 Volts.

I have just finished an audit on three schools on an Island for the 
Govt. and none of them work properly.

They all have paralleled SW3048E's and in one case the installation is 
15 feet from the high tide mark.

There have been a heap of problems and I am concluding that the basic 
design is flawed.  They are running about 18 computers on the same 
common phase as several pumps for the sewage system, pool circulation 
and water pressure.  There is also refrigeration, microwaves 
photocopiers - you name it...
I think they should have split the power distribution and run the 
inverters separately creating two phases, keeping the sensitive 
equipment separate from the 'dirty loads'.

Any comment appreciated.

Carl Emerson
Free Power Ltd.
Auckland NZ



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