VansAirForceForums  
Home > VansAirForceForums

-POSTING RULES
-Advertise in here!
- Today's Posts | Insert Pics

Keep VAF Going
Donate methods

Point your
camera app here
to donate fast.

  #1  
Old 11-30-2012, 07:55 AM
humptybump humptybump is offline
 
Join Date: Feb 2011
Location: USA
Posts: 3,180
Default AMMeter(s) in a redundant system

The Van's electrical diagram installs a ammeter between the battery and the alternator. Thus, the gauge shows battery draw or charge.

For those with modern panels, EMS, configurable panels, etc. What do you measure and/or show ?

Some options I am considering are:
  1. measure the current between the battery and the alternator just as Van's describes
  2. measure the individual current loads for the battery and the alternator (and the backup battery if one exists) - this would require isolating the battery charging circuit(s)
  3. measure the current between the battery and the alternator but also measure the current load of the backup battery
  4. something else

I am already planning on monitoring voltage for each source.
Reply With Quote
  #2  
Old 11-30-2012, 08:04 AM
rzbill's Avatar
rzbill rzbill is offline
 
Join Date: Nov 2005
Location: Asheville, NC
Posts: 2,731
Default

I expect you will find proponents of every different architecture possible.
It is up to individual taste.

I chose to measure alternator outputs per Aeroelectric recomendations.
I have 2. The standard alternator and a vacuum pad unit. Hall effect sensors on each.
__________________
Bill Pendergrass
ME/AE '82
RV-7A: Flying since April 15, 2012. 850 hrs
YIO-360-M1B, mags, CS, GRT EX and WS H1s & A/P, Navworx
Unpainted, polished....kinda'... Eyeballin' vinyl really hard.
Yeah. The boss got a Silhouette Cameo 4 Xmas 2019.
Reply With Quote
  #3  
Old 11-30-2012, 12:44 PM
Wayne Gillispie Wayne Gillispie is offline
 
Join Date: Apr 2009
Location: USA
Posts: 1,499
Default I have three hall effect sensors

1. Between alternator and start solenoid on #6 ga.
2. Between main battery and start solenoid on #2 ga.
3. Between aux battery and E-bus on #10 ga.
__________________
Good judgment comes from experience, and a lot of that comes from bad judgment.
Reply With Quote
  #4  
Old 11-30-2012, 03:09 PM
humptybump humptybump is offline
 
Join Date: Feb 2011
Location: USA
Posts: 3,180
Default

Wayne - I'd be interested in who's sensor you installed.
Reply With Quote
  #5  
Old 11-30-2012, 03:25 PM
Wayne Gillispie Wayne Gillispie is offline
 
Join Date: Apr 2009
Location: USA
Posts: 1,499
Default

GRT- 100 Amp 2 ea and 50 Amp 1 ea. They work great.
__________________
Good judgment comes from experience, and a lot of that comes from bad judgment.
Reply With Quote
  #6  
Old 11-30-2012, 03:48 PM
RVG8tor's Avatar
RVG8tor RVG8tor is offline
 
Join Date: Mar 2007
Location: McKinney, TX
Posts: 1,261
Default 2 alt & one Ammeter

I went with on ammeter shunt since I only need to see the amps produced to the main buss, it does not matter which provides the power the main or the standby alternator. I ran this by Bob N. over at Aeroelectric and he thought it should work. Saves some wires with the hall effect and or second shunt and gauge.

My set up goes like this; Main alt to an ANL (Current limiter) this protects the Alt wire. Then after the ANL and before the Ammeter shunt I tied in my Stby Alt B-Lead and protect it with a fuseable link. I used the down stream post on the ANL. This way my Amp meter will read the amp draw from what ever is sending power to the buss. I have not fired the engine up yet but should in the next week. I have run the operational (no engine running tests) and all seems to work well. Turn off the Main Alt Field and the Stby Alt On light comes on with associated changes to the field circuits.

The Stby Regulator is at a lower set point than what the main alternator puts out so it just idles until needed. Some keep it off and manually turn it on when needed, Bob said the regulator is set up so you can keep the Stby Alt field switch to on and just let it do itd magic when needed. This should notify you of a main alt failure sooner since the Stby On lights up as soon as it starts to provide power, no need to notice low voltage.

Cheers
__________________
Mike "Nemo" Elliott
RV-8A (First Flight 12-12-12!)
KOCF
N800ME
www.mykitlog.com/rvg8tor


Dues Paid 2019
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 08:23 PM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.