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Alternator switch/breaker wiring

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rvbuilder927(at)yahoo.com
Guest

Posted: Sun Jun 01, 2008 8:25 pm Post subject: Alternator switch/breaker wiring

I am in the process of wiring my Plane Power alternator and I am wondering of it matters in what sequence the 5 amp breaker and the switch are placed.  I currently have the field wire from the alternator connected to the breaker, then the breaker to the switch (DPDT), then to the bus, as I believe is shown on drawing Z-11 

  

   ALT FIELD-BREAKER-SWITCH-BUS 

  

 The Plane Power schematic shows the field wire connected to the switch, then the switch to the breaker, then to the bus.   

  

  ALT FIELD-SWITCH-BREAKER-BUS 

  

Does it matter from a practical and safety standpoint? 

  

Thanks. 

Ward Morris 

  

 

         [quote][b]

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terryml5c2p6(at)sympatico
Guest

Posted: Mon Jun 02, 2008 6:49 am Post subject: Alternator switch/breaker wiring

 	  Quote: 	
		  From a safety viewpoint, you should locate the breaker as close to the 

source of power as possible. The field circuit does not generate power at 
	


the alternator end, it absorbs power from the bus,i.e. the source is the 

bus. The breaker is necessary both because the wiring from the bus to the 

field must be protected against inadvertent faults to ground anywhere along 

its length, but because some overvoltage protection circuits intentionally 

short the field to ground to take the alternator causing the overvoltage off 

line as quickly as possible.



Terry McMillan



 	  Quote: 	
		  From: Steve Johnson <rvbuilder927(at)yahoo.com>

Reply-To: aeroelectric-list(at)matronics.com

To: "aeroelectric-list(at)matronics.com" <aeroelectric-list(at)matronics.com>

Subject: Alternator switch/breaker wiring

Date: Sun, 1 Jun 2008 21:17:14 -0700 (PDT)



I am in the process of wiring my Plane Power alternator and I am wondering 

of it matters in what sequence the 5 amp breaker and the switch are 

placed.  I currently have the field wire from the alternator connected 

to the breaker, then the breaker to the switch (DPDT), then to the bus, as 

I believe is shown on drawing Z-11

 

   ALT FIELD-BREAKER-SWITCH-BUS

 

 The Plane Power schematic shows the field wire connected to the 

switch, then the switch to the breaker, then to the bus. 

 

  ALT FIELD-SWITCH-BREAKER-BUS

 

Does it matter from a practical and safety standpoint?

 

Thanks.

Ward Morris

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nuckolls.bob(at)cox.net
Guest

Posted: Wed Jun 04, 2008 5:36 am Post subject: Alternator switch/breaker wiring

At 09:17 PM 6/1/2008 -0700, you wrote:



 	  Quote: 	
		  I am in the process of wiring my Plane Power alternator and I am wondering 

of it matters in what sequence the 5 amp breaker and the switch are 

placed.  I currently have the field wire from the alternator connected to 

the breaker, then the breaker to the switch (DPDT), then to the bus, as I 

believe is shown on drawing Z-11


	


   Breakers and fuses should be as close to the

   energy source as practical . . . I.e., at the

   bus.



   Bob . . .

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