Mauledriver(at)nc.rr.com
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 Posted: Sun Jul 28, 2013 1:25 pm Post subject: Low voltage indicator with dual alternators |
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I installed the Intelligent Power Stabilizer IPS-12v-8a this past week and did some testing. It appears to have solved my problems. Thanks to all involved!
To recap:
Problem; Despite having a robust Z-14 power scheme installed in my RV10, I found myself starting on 1 battery because if I started with both batteries, my 3 GRT EFISs would re-boot. I This defeated one of the advantages of the Z-14 dual alternator, dual battery, dual bus architecture.
Solution; I installed TCW's IPS-12v-8a unit and connected the 3 EFISs and the GPS/NAV side of the G430. The EFISs each have 3 power inputs and will draw from the input with most juice. So the EFISs remain connected to one of the buses but the secondary inputs are connected to the IPS unit. The G430/GPS/NAV is connected directly to the IPS only.
Test Results; I am now able to turn on the EFISs and the G430, use them for flight planning and clearance work (say 10 minutes), then turn on the other bus, interconnect the 2 buses and start the engine. The engine turnover is clearly more robust and the EFISs continue to run without a hiccup.
I also did some bus load rebalancing to better reflect the charging capabilities of the main and secondary alternators.
Now I'll be flying with the Z-14 as it is designed. Fully interconnected buses for start and disconnected into 2 separate buses for flight operations. Interconnection is available if needed in various failure scenarios.
Thanks Bob N and Thanks Bob N!
On 7/10/2013 2:11 PM, Tcwtech wrote:
[quote] Our IBBS product line provides back-up power to devices like efis equipment as well as GPS and comm systems. One of the added benefits is that during engine cranking the auto transfer circuitry knows to keep the connected load from dropping out and resetting. Connecting our IBBS product to the GRT system is very straight forward and 1/2 the weight of adding another similar sized lead acid battery.
Also, if you don't need the full feature of back-up power and just want to resolve the issues with system resets during engine cranking, our IPS systems provide consistent, stable voltage to the connected load(s) with a maintenance free solution.
All the details are on our web site and can be seen at our booth at Oshkosh.
Www.Tcwtech.com
On Jul 10, 2013, at 10:52 AM, Bill Watson <Mauledriver(at)nc.rr.com (Mauledriver(at)nc.rr.com)> wrote:
| Quote: | Wow! The TCW product seems perfect for the GRT issue. Was unaware of it. Thanks.
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[b]
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