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Z-16 Question

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kenryan

Joined: 20 Oct 2009
Posts: 426

Posted: Mon Aug 01, 2016 9:39 am Post subject: Z-16 Question

The Rotax Installation Manual tells us that when the engine is not running, the circuit between regulator C terminal and the battery must be broken to avoid running down the battery. But the Z-16 does not seem to account for this.



Does the relay that breaks the connection between the "Dynamo" and the "Voltage Regulator" serve the same purpose? That is, does opening that relay accomplish the same thing (avoiding battery run down) as would a relay in the C wire itself?

Thanks.

Ken

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kenryan

Joined: 20 Oct 2009
Posts: 426

Posted: Mon Aug 01, 2016 9:53 am Post subject: Z-16 Question

Sorry guys. I answered my own question. The connection is broken by the battery contactor. Again, sorry for my error. --Ken



On Mon, Aug 1, 2016 at 9:36 AM, Ken Ryan <keninalaska(at)gmail.com (keninalaska(at)gmail.com)> wrote:

 	  Quote: 	
		  The Rotax Installation Manual tells us that when the engine is not running, the circuit between regulator C terminal and the battery must be broken to avoid running down the battery. But the Z-16 does not seem to account for this.



Does the relay that breaks the connection between the "Dynamo" and the "Voltage Regulator" serve the same purpose? That is, does opening that relay accomplish the same thing (avoiding battery run down) as would a relay in the C wire itself?

Thanks.

Ken

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nuckolls.bob(at)aeroelect
Guest

Posted: Mon Aug 01, 2016 10:47 am Post subject: Z-16 Question

At 12:49 PM 8/1/2016, you wrote:

  	  Quote: 	
		  Sorry guys. I answered my own question. The connection is broken by the battery contactor. Again, sorry for my error. --Ken 	


   The battery/alternator switch breaks "C"

   loose too.



 

 

   Bob . . .

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kenryan

Joined: 20 Oct 2009
Posts: 426

Posted: Mon Aug 01, 2016 11:01 am Post subject: Z-16 Question

Bob, 



Help me understand this. It looks like the battery/alternator switch opens the S704-1 relay, which in turns opens the connection between the generator and the regulator-rectifier. Are you saying that that has the same effect as actually breaking the C with the battery?

Ken





On Mon, Aug 1, 2016 at 10:46 AM, Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)> wrote:

 	  Quote: 	
		    At 12:49 PM 8/1/2016, you wrote:

  	  Quote: 	
		  Sorry guys. I answered my own question. The connection is broken by the battery contactor. Again, sorry for my error. --Ken 	


   The battery/alternator switch breaks "C"

   loose too.



 

 

   Bob . . .

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user9253

Joined: 28 Mar 2008
Posts: 1922
Location: Riley TWP Michigan

Posted: Mon Aug 01, 2016 1:48 pm Post subject: Re: Z-16 Question

 	  Quote: 	
		  Are you saying that that has the same effect as actually breaking the C with the battery? 	


Since the battery contactor and the dynamo relay are controlled by the same switch, shutting off the master switch disconnects both the battery and dynamo.  

Even though regulator terminal "C" has not been disconnected with a dedicated switch, terminal "C" is no longer receiving voltage because both power sources (battery & dynamo) have been disconnected.

  If only the dynamo relay is shut off, but the battery contactor remains on, then regulator terminal "C" will still be getting voltage from the battery and the regulator will still be enabled.  However, the regulator can not output any voltage or current because it is not receiving any AC power from the disconnected dynamo.

  Without alternating power input, the rectifier/regulator can not supply an output regardless of whether the regulator is enabled via terminal "C" or not.

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