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Regulator Options for ALX8521

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planesmith(at)hotmail.com
Guest

Posted: Sun Nov 18, 2007 10:51 am Post subject: Regulator Options for ALX8521

I have a Electro-Systems (Prestolite) ALX8521 70 amp 12 volt alternator I would like to use on my RV project. What are the options for a regulator? VR166 (generic Ford) with OV protection, B&C, or what? I've gone through the AeroElectric book and the archives but haven't found a definitive answer, maybe the answer is too obvious.  Any insights will be helpful.

 Thanks,

  

 Vern Smith

You keep typing, we keep giving. Download Messenger/im/home/?source=CRM_WL_joinnow' target='_new'>Join in!  [quote][b]

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rjquillin

Joined: 13 May 2007
Posts: 123
Location: KSEE

Posted: Sun Nov 18, 2007 11:33 am Post subject: Regulator Options for ALX8521

At 10:48 11/18/2007, you wrote:

 	  Quote: 	
		  I have a Electro-Systems (Prestolite) ALX8521 70 amp 12 volt 

alternator I would like to use on my RV project. What are the 

options for a regulator? VR166 (generic Ford) with OV protection, 

B&C, or what? I've gone through the AeroElectric book and the 

archives but haven't found a definitive answer, maybe the answer is 

too obvious.  Any insights will be helpful.

Thanks,



Vern Smith


	


Might want to look at some of the offerings here:

http://zeftronics.com/



  R15V00RevA is about the same as B&C LR3C-14 for less $$$.

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nuckolls.bob(at)cox.net
Guest

Posted: Sun Nov 18, 2007 8:26 pm Post subject: Regulator Options for ALX8521

At 11:48 AM 11/18/2007 -0700, you wrote:



 	  Quote: 	
		  I have a Electro-Systems (Prestolite) ALX8521 70 amp 12 volt alternator I 

would like to use on my RV project. What are the options for a regulator? 

VR166 (generic Ford) with OV protection, B&C, or what? I've gone through 

the AeroElectric book and the archives but haven't found a definitive 

answer, maybe the answer is too obvious.  Any insights will be helpful.

Thanks,


	


   Your options are varied and numerous. You can

   go the generic route and assemble regulator, ov

   protection and lv warning from individual components

   or go the Cadillac rout with the B&C LR3 series

   controllers with everything in one package. There

   is no one choice inherently superior to others

   beyond avoiding products with demonstrably poor

   service lives (i.e. poor return on investment).



   Bob . . .



        ----------------------------------------)

        ( . . .  a long habit of not thinking   )

        ( a thing wrong, gives it a superficial )

        ( appearance of being right . . .       )

        (                                       )

        (                  -Thomas Paine 1776-  )

        ----------------------------------------

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planesmith(at)hotmail.com
Guest

Posted: Mon Nov 19, 2007 7:39 am Post subject: Regulator Options for ALX8521

Because of the 70 amp rating I didn't realize my options were so wide open.

 Thanks for the replies,

  

 Vern Smith





   

 > Date: Sun, 18 Nov 2007 22:24:16 -0600

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

 From: nuckolls.bob(at)cox.net

 Subject: Re: AeroElectric-List: Regulator Options for ALX8521

 

 --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckolls.bob(at)cox.net>

 

 At 11:48 AM 11/18/2007 -0700, you wrote:

 

 >I have a Electro-Systems (Prestolite) ALX8521 70 amp 12 volt alternator I 

 >would like to use on my RV project. What are the options for a regulator? 

 >VR166 (generic Ford) with OV protection, B&C, or what? I've gone through 

 >the AeroElectric book and the archives but haven't found a definitive 

 >answer, maybe the answer is too obvious. Any insights will be helpful.

 >Thanks,

 

 Your options are varied and numerous. You can

 go the generic route and assemble regulator, ov

 protection and lv warning from individual components

 or go the Cadillac rout with the B&C LR3 series

 controllers with everything in one package. There

 is no one choice inherently superior to others

 beyond avoiding products with demonstrably poor

 service lives (i.e. poor return on investment).

 

 Bob . . .

 

 ----------------------------------------)

 ( . . . a long habit of not thinking )

 ( a thing wrong, gives it a superficial )

 ( appearance of being right . . . )

 ( )

 ( -Thomas Paine 1776- )

 ------======================

 

 

 


	


You keep typing, we keep giving. Download Messenger and join the i’m Initiative now. Join in!  [quote][b]

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nuckolls.bob(at)cox.net
Guest

Posted: Mon Nov 19, 2007 9:00 am Post subject: Regulator Options for ALX8521

At 08:38 AM 11/19/2007 -0700, you wrote:



 	  Quote: 	
		  Because of the 70 amp rating I didn't realize my options were so wide open.

Thanks for the replies,



Vern Smith


	


    Unlike generators . . . the regulator is NOT affected

    by the size of the alternator. I've installed the LR3

    series regulators on alternators from 35 to 105 amps

    with good results.



    A generator's regulator MUST be aware of the generator's

    loads for the purpose of adjusting output to LIMIT the

    output current and prevent burned wires, commutator

    and brushes. Before the advent of solid state

    rectifiers, a generator's regulator needed three

    separate "relay" looking devices for the purpose

    of controlling voltage, limiting current and electrical

    disconnection of a generator that is turning too slow

    or stopped. An exemplar regulator looked like this:



http://www.aeroelectric.com/Pictures/Regulators/GenReg_2A.jpg



    Alternators are inherently current limited so

    don't need attention from the regulator for

    protection. They are inherently incapable of

    reverse current flow through the rectifiers

    that converts the alternator's AC to system DC

    current. This leaves only the voltage regulator

    function which was handled with a simpler device



http://www.aeroelectric.com/Pictures/Regulators/ALTREG2.jpg



    where the right-hand critter is the votlage

    regulator. The one on the left is a field

    control relay which is surplus to management

    of the alternator in most systems. A solid

    state version without a field control relay

    looks more like this:



http://www.aeroelectric.com/Pictures/Regulators/Ford_SS_Reg_open.jpg



    and will work just fine with about any externally

    regulated alternator.



   Bob . . .

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planesmith(at)hotmail.com
Guest

Posted: Mon Nov 19, 2007 11:59 am Post subject: Regulator Options for ALX8521

Bob,

 Thanks for the explanation and expanding my knowledge base.

 Vern

 do not archive

 > Date: Mon, 19 Nov 2007 10:56:01 -0600

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

 From: nuckolls.bob(at)cox.net

 Subject: RE: AeroElectric-List: Regulator Options for ALX8521

 --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckolls.bob(at)cox.net>

 At 08:38 AM 11/19/2007 -0700, you wrote:

 >Because of the 70 amp rating I didn't realize my options were so wide open.

 >Thanks for the replies,

 >

 >Vern Smith

 Unlike generators . . . the regulator is NOT affected

 by the size of the alternator. I've installed the LR3

 series regulators on alternators from 35 to 105 amps

 with good results.

Share life as it happens with the new Windows Live. Share now!  [quote][b]

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