MX60's and positive ground [RE-wrenches]
Christopher Freitas --- OutBack Power
cfreitas at outbackpower.com
Tue Jan 15 11:10:22 PST 2008
Carl, Darryl and All -
I just sent Carl the diagram - his request was a little unusual in that
he also wanted to have ground fault protection in the system - which can
be done.
One caution - the MX60 is not listed for positive ground applications
and the method we use for positive ground applications is not completely
NEC compliant - but it is safe and works.
It does require a special wiring configuration and the use of two pole
breakers or a GFP breaker. If it is not installed per our instructions
it is possible to damage the HUB due to currents in the communication
cables.
Christopher
Christopher Freitas
OutBack Power Systems, Inc.
cfreitas @ outbackpower.com
www.outbackpower.com
Arlington WA USA
Tel 360 435 6030
Darryl Thayer wrote:
>
> HI Carl and everyone, I was just a little to quick in
> my answer. When you do positive ground, YOu Ground
> the battery, and the Array frame, and the MX60 frame.
> BUT NOT Ground the positive from the modules only the
> Positive of the Battery (which is grounded at the
> Tele-com site) Again do not ground the array
> positive, as this will by pass MX60 which does its
> boost operation on the positive circuit through the
> controller.
>
> good luck
> Darryl
> --- "Carl Emerson, Free Power Ltd."
> <freepower at freepower.co.nz> wrote:
>
> >
> > Hi there team,
> >
> > We are doing a telecom system with pos earth -48Volt
> > DC.
> >
> > We have 2 x MX60's on a thin film 2.2 kW array. I
> > need the diagram that
> > shows how to cable this correctly. I tried Chis D
> > and he has been too busy
> > to get back. Can someone help out here as we are
> > running out of time...
> >
> > Thanks
> >
> > Carl Emerson
> > Free Power Ltd.
> > Auckland N.Z.
> >
> >
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Christopher Freitas
OutBack Power Systems, Inc.
cfreitas @ outbackpower.com
www.outbackpower.com
Arlington WA USA
Tel 360 435 6030
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