Pulse DC Breaker Question [RE-wrenches]
Chris Worcester
chris at solarwindworks.com
Thu Dec 16 11:42:58 PST 2004
Your free subscription is supported by today's sponsor:
-------------------------------------------------------------------
** Get Your Own Support-a-Cure Yellow Bracelet for $1.99 **
Show your support for finding cures for both AIDS & Cancer.
Get yours for just $1.99. This bracelet makes a difference.
http://click.topica.com/caacVlObz8Qcsbz9JC9a/Penn Media
-------------------------------------------------------------------
Hi Allen,
We are doing a similar system upgrade with an existing Pulse PC500 & two
SW5548's. Our new roof mounted 6kW PV array is feeding a pair of MX60's
we're mounting on an OutBack PS2DC-175 box which has the room for our GFP/2
CB and four 60A MX60 CB's. The 175A OBDC CB is feeding the PC500 with 2/0
THHN, taking advantage of the shunt for the Trimetric 20-20. I don't know if
you have room for this setup, you can mount the MX60's side by side on top
of the PS2DC for a very narrow configuration, 11.5" wide. Our MX60's will be
on a different wall with conduit and 6 x 6" tray to the PC500, batteries,
inverters, etc.
I haven't seen what the difference is in the PC500 and PSC500, although they
have offered numerous options.
Sincerely,
Chris Worcester
Solar Wind Works
NABCEP Certified Solar PV Installer
USA Distributor of Proven Wind Turbines
Toll Free: 877-682-4503
Fax: 530-582-4603
www.solarwindworks.com
chris at solarwindworks.com
"Proven Energy Solutions"
-----Original Message-----
From: Allan Sindelar
Wrenches,
I am preparing a design for a system upgrade and need some help with the
Pulse Powercenter. they want to go from the existing 720
watts of PV to about 4,000 watts. I am looking at two large new arrays wired
at 48 V, each feeding an MX60 and a 24V battery bank. There's an existing
SB50 upgrade on the original array.
The Powercenter is a Pulse PSC500. This unit has five DC breaker spaces for
Heinemann CF panel-mount breakers--that's all. There's a separate QO load
center for multiple 24V DC load breakers. Raising the system voltage is not
a realistic option at this time, and there's very little wall space for
adding big boxes.
Questions:
--How do we add the breakers for two additional charge controllers?
--If we add a 60A Class R fuse for AIC protection on the loads, can I free
up one breaker space by backfeeding a 60A QO for a main DC load breaker in
the DC load center? (I know QO are marginal at 24V per John Wiles, but this
is an existing installation, so this is just a modification; besides, I'm OK
with QOs on the load side as being always safely below 50V per NEC.)
--Could we add a GJ175 next to the existing GJ250 for the SW4024, call it a
charge controller disconnect, and use the tap rule to run multiple
conductors to the three controllers?
--Anyone else make a narrower breaker that's suitable for this application?
Or a small separate enclosure to fit half a dozen 80VDC rated breakers?
--And what's the diff between a PSC500 and a PC500?
Your free subscription is supported by today's sponsor:
-------------------------------------------------------------------
Amazing Diet Patch
The fastest - Easiest way to lose weight! Try it now FREE!
http://click.topica.com/caacVmibz8Qcsbz9JC9f/MyDietPatches
-------------------------------------------------------------------
- - - -
To send a message: RE-wrenches at topica.com
Archive of previous messages: http://lists.topica.com/lists/RE-wrenches/read
List rules & etiquette: www.mrsharkey.com/wrenches/etiquette.php
Check out participant bios: www.mrsharkey.com/wrenches/
Hosted by Home Power magazine
Moderator: michael.welch at homepower.com
--^----------------------------------------------------------------
This email was sent to: michael.welch at homepower.com
EASY UNSUBSCRIBE click here: http://topica.com/u/?bz8Qcs.bz9JC9.bWljaGFl
Or send an email to: RE-wrenches-unsubscribe at topica.com
For Topica's complete suite of email marketing solutions visit:
http://www.topica.com/?p=TEXFOOTER
--^----------------------------------------------------------------
More information about the RE-wrenches
mailing list