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601XL/Jab 3300 Build in progress Alternator questions

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lwhitlow

Joined: 15 Jan 2006
Posts: 76
Location: Valparaiso Indiana

Posted: Sun Dec 31, 2006 6:13 pm Post subject: 601XL/Jab 3300 Build in progress Alternator questions

Hi all



I have followed the 'Lectric list for a while and I'm at the stage in my build where I must start considering the electrical system.



If I'm not mistaken the Jab has a 20A alternator with internal regulation



I don't have the book but I have read here about OV and runaway altenator protection.



How have others handled the OV issue with this engine? Could someone point me to the where in the archives I might look?



Thanks



Larry Whitlow

601XL/Jab 3300

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sonex76(at)velocity.net
Guest

Posted: Sun Dec 31, 2006 7:26 pm Post subject: 601XL/Jab 3300 Build in progress Alternator questions

Larry,



Check out the Z-20 figure for the Jab engine electrical

system.



Dick Fisher

sonex76/Jab3300

---

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lwhitlow

Joined: 15 Jan 2006
Posts: 76
Location: Valparaiso Indiana

Posted: Sun Dec 31, 2006 10:05 pm Post subject: Re: 601XL/Jab 3300 Build in progress Alternator questions

OK .. So I was wrong...



Is the Jab Regulator firewall mounted???  I was on the Jab site and all it shows is the pinout of the connector.



Thanks



Larry Whitlow 601XL/Jab 3300

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jetboy

Joined: 22 Jul 2006
Posts: 233

Posted: Sun Dec 31, 2006 11:09 pm Post subject: Re: 601XL/Jab 3300 Build in progress Alternator questions

Larry,

           I have the 2200 which is similar to the 3300 and I recall the max continuous you will get is 15A - they are only dynamo (PMAs) with a single phase series switching regulator. However they do seem to do better than the similar system on the 912 and as you require something like 20 A/hr for the starting battery there is no need for OV protection.



Download the Jabiru manual it includes wiring diagrams the main requirement is to connect the batt directly across the regulator (use a short #20 fusible link if you want to be cautious) 



There will be switching noise on the AC and output wiring so its really simpler to leave that as short as possible and not run them into the cockpit.  If you are mounting the battery remotely for W/B then you may require a capacitor at the regulator O/P such as 20,000 uF 25 V like the 912 requires. If you dont have the OEM regulator there are others that claim to do the job better in my case there have been no adverse issues it just keeps eveything as it should be.



Ralph

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Ralph - CH701 / 2200a

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