---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sat 05/18/13: 6 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:53 AM - Re: S700-2-10 master switch (Robert L. Nuckolls, III) 2. 10:32 AM - Re: Back when they were still carbon dust . . . (Paul Millner) 3. 01:27 PM - Re: S700-2-10 master switch (Sigma Eta Aero) 4. 01:40 PM - Re: Z13/8 all electric airplane (jonlaury) 5. 03:42 PM - Re: S700-2-10 master switch (Ben) 6. 04:06 PM - Re: Re: Z13/8 all electric airplane (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 06:53:31 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: S700-2-10 master switch At 10:40 PM 5/17/2013, you wrote: >I have an Aeroelectric recommended electrical system for a Rotax >912S with a S700-2-10 master switch that has about 350 hours on >it. I've recently been seeing the overvoltage protection light >coming on periodically so today I went through the troubleshooting >checklist for the Rotax alternator and regulator/rectifier. When I >got to testing the master switch the OVP would kick on an off when >the switch was pulled and wiggled so I'm pretty sure the switch is >bad. Is that pretty common and should I be using another switch >that's more robust? Or are there multiple manufacturers of this >switch, some with better quality than others? When you say the ov protection light comes on, is this the light associated with the alternator disconnect relay in the B&C PM alternator control kit? The 2-10 switching protocol is offered by many manufacturers. If you purchased the 2-10 from B&C, then it's a Carling with riveted fast-on tabs. It may be that one of these joints is loose. I'd like to have your failed switch for analysis. I'm forwarding a copy of this to B&C. I think they'd be happy to send you a new switch if you send the old one to me. We'd like to know what's going on. Will report finding to the List. Give Greg a call at 316-283-8000. Send the switch to Box 130, Medicine Lodge, KS 67104 Bob . . . ________________________________ Message 2 _____________________________________ Time: 10:32:13 AM PST US From: Paul Millner Subject: Re: AeroElectric-List: Back when they were still carbon dust . . . ________________________________ Message 3 _____________________________________ Time: 01:27:55 PM PST US From: Sigma Eta Aero Subject: Re: AeroElectric-List: S700-2-10 master switch Thanks Bob. -Yes, I have the disconnect relay kit.=0A=0AI'll get a hold o f Greg and then send you the switch after I swap it.=0A=0AI must not have g ood luck with switches, the first ACS key switch I had was bad right out of the box. -The replacement they sent was just fine.=0A=0A-=0A=0A=0A____ ____________________________=0A From: "Robert L. Nuckolls, III" =0ATo: aeroelectric-list@matronics.com; Greg Jones =0ASent: Saturday, May 18, 2013 6:51 AM=0ASubject: Re: AeroEle ctric-List: S700-2-10 master switch=0A =0A=0A=0AAt 10:40 PM 5/17/2013, you wrote:=0A=0AI have an Aeroelectric=0Arecommended electrical system for a Ro tax 912S with a S700-2-10 master=0Aswitch that has about 350 hours on it. - I've recently been seeing=0Athe overvoltage protection light coming on periodically so today I went=0Athrough the troubleshooting checklist for th e Rotax alternator and=0Aregulator/rectifier.- When I got to testing the master switch the=0AOVP would kick on an off when the switch was pulled and wiggled so I'm=0Apretty sure the switch is bad.-- Is that pretty commo n and=0Ashould I be using another switch that's more robust?- Or are ther e=0Amultiple manufacturers of this switch, some with better quality than=0A others?- =0A- When you say the ov protection light comes=0A- on, is t his the light associated with the=0A- alternator disconnect relay in the B&C=0A- PM alternator control kit?=0A=0A- The 2-10 switching protocol i s offered by=0A- many manufacturers. If you purchased the 2-10=0A- from B&C, then it's a Carling with riveted=0A- fast-on tabs. It may be that o ne of these=0A- joints is loose. I'd like to have your failed=0A- switc h for analysis.=0A=0A- I'm forwarding a copy of this to B&C. I think=0A - they'd be happy to send you a new switch if=0A- you send the old one to me. We'd like to know=0A- what's going on. Will report finding to the =0A- List.=0A=0A- Give Greg a call at 316-283-8000. Send the=0A- swit ch to Box 130, Medicine Lodge, KS 67104=0A=0A=0A=0A- Bob . . . ________________________________ Message 4 _____________________________________ Time: 01:40:18 PM PST US Subject: AeroElectric-List: Re: Z13/8 all electric airplane From: "jonlaury" @ Bob: "Either one" really? I may be missing something here, but wouldn't " Line" indicate the battery and "load" would indicate the Aux Alt field. If "Line" is Batt Positve, connecting "Load" to ground will trip the breaker. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=400924#400924 ________________________________ Message 5 _____________________________________ Time: 03:42:20 PM PST US From: "Ben" Subject: Re: AeroElectric-List: S700-2-10 master switch Ben Haas N801BH www.haaspowerair.com ---------- Original Message ---------- From: Sigma Eta Aero Subject: Re: AeroElectric-List: S700-2-10 master switch I must not have good luck with switches, the first ACS key switch I had was bad right out of the box. The replacement they sent was just fine. Yuck................ So much for QC.... do not archive ____________________________________________________________ Transformation of America? Stocks soar--but some wealthy citizens are preparing for huge changes http://thirdpartyoffers.netzero.net/TGL3241/5198039a2826839a2854st01duc ________________________________ Message 6 _____________________________________ Time: 04:06:59 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: Z13/8 all electric airplane At 03:39 PM 5/18/2013, you wrote: > >@ Bob: "Either one" really? > >I may be missing something here, but wouldn't " Line" indicate the >battery and "load" would indicate the Aux Alt field. > >If "Line" is Batt Positve, connecting "Load" to ground will trip the breaker. > > yep, here's a thread from 2008 Quote: I am rewiring my Navion panel using busses with Potter-Brumfield W31 switch breakers and Klixon 7277 c/b's. I put the P-B buss bar on the bottom following their Load-Line labeling but put the Klixon bar on top to ease access to the load terminals. My IA neighbor (not my supervising IA) tried to tell me it was backward but I had already checked and there is no labeling on the Klixon c/b's. I see no intuitive reason it should care about polarity but then I don't have a real understanding of their inner workings. Did I miss something? Does polarity matter for the Klixons? If so, I can change my buss. If not, why does P-B label their units (it's also on their W23 c/b's?) Is it real or just a case of eliminating choice? Thanks for the education. BN: Intuitively, the physics of a series-connected heat-tripped, switch do not suggest a reason why the breaker would care which way electrons flow through it . . . and in particular, AC system breakers where electrons are known to turn around and run the other direction 120 times a second! You've already had some good responses but I'll take this opportunity to elaborate. Not all breakers are rudimentary . . . i.e. a simple spring-loaded, heater-tripped latch holding a set of single or double-break contacts closed. Breakers can be had with auxiliary switches, indicator lights, voltage sense coils, and all manner of enhancements where proper function of the enhancement depends on a connection to power being available even when the breaker is open. Obviously, some third terminal is necessary for an enhancement to function, this is sometimes an obvious connection, or perhaps it gets hooked up through the mounting. In any case, it's not uncommon for a manufacturer to use common tooling to mold a breaker housing for all versions, hence you often see the word "load", "line" or both formed right next to the breaker's terminals . . . I've asked several tech reps for breakers and except for enhanced breakers, orientation in the system doesn't matter. Interestingly enough, if an electrician encounters "line" and/or "load" labels on a breaker, he'll wire it up that way whether it matters or not. And I suspect many aviation techs do too . . . not because the physics matters but because some inspector who doesn't know any better can be counted on to insist that the protocols be followed. The only time I've encountered this as a "problem" is when a builder finds it convenient to fabricate a two-row bus-bar and take load feeders off opposite ends of the breaker. When they come stamped with a breaker rating, they look pretty funky with one row upside-down in their holes! Bob . . . ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.