SW+ Voltage Sag [RE-wrenches]
Matt Tritt
solarone at charter.net
Fri Aug 13 19:56:52 PDT 2004
Your free subscription is supported by today's sponsor:
-------------------------------------------------------------------
Get a Great Credit Card for You Today
You can find a credit card to fit your credit needs.
All types of credit cards -- 0% APRs, Rewards, & Bad Credit.
http://click.topica.com/caacvgubz8Qcsbz9JC9a/411Web
-------------------------------------------------------------------
Hmmmmmm.
You say that you're running a 2548 on 2/0 inverter cables. First-off, my
recollection about the SW 12 and 24 volt versions is that they actually
require 4/0 cables to begin with becuase of the possibility of a 400 amp
surge under certain startup conditions.
It also sounds like the batteries are on the low side, which also doesn't
help much, but 175 amps draw? I hope this is on your Skillsaw and not the
Staber. ;-)
How long are your inverter leads and how big is the battery bank?
What is the problem with the Washer?
Matt T
----- Original Message -----
From: "Ray Walters" <ray at solarray.com>
To: <RE-wrenches at topica.com>
Sent: Friday, August 13, 2004 10:46 AM
Subject: SW+ Voltage Sag [RE-wrenches]
Your free subscription is supported by today's sponsor:
-------------------------------------------------------------------
Need cash fast? Get a $500 CASH ADVANCE overnight! Let
YourCashCentral get you the cash you need.
http://click.topica.com/caacxycbz8QcsbadqCja/MyOnlinePayday
-------------------------------------------------------------------
>Dear esteemed colleagues;
I am currently troubleshooting a Staber Washer control malfunction on an
Xantrex SW2524+ inverter. What I found curious is that the voltage sags
down to 88 VAC rms for about a tenth of a second during starting surge. I
am using a worm drive circular saw after to test. Measurements are at the
inverter AC terminals with a Fluke 89 set to normal MIN capture.(the fast
capture would get the bottom of the wave form itself) I also measured the
DC side and found the voltage to be 24.6 vdc at rest with the surge
pulling
it down to 22.9 vdc (again regular MIN capture on the Fluke). MIN volts
for
0.1 secs at the battery terminals was 23.2 vdc. The DC current surge
measured at the shunt block with the Fluke was an amazing 175 amps for 0.1
secs. AC current was harder to measure surge, but I saw a 27 amp peak at
the Inverter's onboard meter.
My question is this: Is it normal to see a temporary voltage sag like this
when powering a heavy inductive load. I rechecked all my connections AC
and
DC. I looked for volt drop at any tell tale points, etc. I am thinking its
an inductive issue with the DC cables, and so my next visit I wanted to
upsize the cables to 4/0 and twist the cables around each other.
Everything
else on the system seems to work great, other than occasionally a UPS box
for the computer beeps, again with a start surge from another appliance.
Your feedback, wisdom, comments, & of course criticisms are all greatly
appreciated.
Ray Walters
ray at solarray.com
President, SolarRay, Inc.
NABCEP Certified Solar PV Installer
BS Mechanical Engineering, UT Austin 88
Returned US Peace Corps Volunteer
Your free subscription is supported by today's sponsor:
-------------------------------------------------------------------
Get a Great Credit Card for You Today
You can find a credit card to fit your credit needs.
All types of credit cards -- 0% APRs, Rewards, & Bad Credit.
http://click.topica.com/caacvgubz8QcsbadqCjf/411Web
-------------------------------------------------------------------
- - - -
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/etiquete.htm
Check out participant bios: www.mrsharkey.com/wrenches/
Hosted by Home Power magazine
Moderator: michael.welch at homepower.com
Your free subscription is supported by today's sponsor:
-------------------------------------------------------------------
RE-GROW YOUR HAIR STARTING NOW.....Click here for more info!
http://click.topica.com/caacxydbz8Qcsbz9JC9f/Medical Hair Restoration
-------------------------------------------------------------------
- - - -
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/etiquete.htm
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