X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 26 Apr 2012 10:39:36 -0400 Message-ID: X-Original-Return-Path: Received: from carbinge.com ([69.5.27.218] verified) by logan.com (CommuniGate Pro SMTP 5.4.4) with SMTP id 5507901 for lml@lancaironline.net; Thu, 26 Apr 2012 09:50:36 -0400 Received-SPF: none receiver=logan.com; client-ip=69.5.27.218; envelope-from=jbarrett@carbinge.com Received: (qmail 19487 invoked from network); 26 Apr 2012 13:50:00 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; h=X-Originating-IP:Reply-To:From:To:References:In-Reply-To:Subject:Date:Message-ID:MIME-Version:Content-Type:X-Mailer:Thread-Index:Content-Language; s=default; d=carbinge.com; b=Ehab/0gt8ee8PJju546hv4KpisZRd115x391qcVTtjgnCBrLbJ/sDRczJ0wkyyCeQ4Q/AWCDsfgrmqvlJQJ7v2Awh+EWsCzUqE25PaOmKmXhsvUVdI2c2nEd71hc4PR1TS72u74Ig1mgClOMGscOoWQ5/lkKSJbNU2hTuKkUsEI=; X-Originating-IP: [24.143.114.61] Reply-To: From: "John Barrett" X-Original-To: "'Lancair Mailing List'" References: In-Reply-To: Subject: RE: [LML] Re: Contactors vs Solid State Relays X-Original-Date: Thu, 26 Apr 2012 06:49:58 -0700 X-Original-Message-ID: <039e01cd23b3$791a7e70$6b4f7b50$@com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_039F_01CD2378.CCBBA670" X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: Ac0joqhdJL64De18Sla2NflKHDoWNQAEBuBw Content-Language: en-us This is a multi-part message in MIME format. ------=_NextPart_000_039F_01CD2378.CCBBA670 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Fred. Sounds like a better choice than we've been using. One question comes to mind - surrounding the idea I have (is it correct?) that the starter solenoid should be intermittent because you want it to be the weak link in the starter circuit: if the starter contactors should stick, you'd have a huge amperage draw and maybe start a fire. If the contactor is intermittent, it will theoretically fail and break the contact before the starter motor burns up and catches fire or causes other damage. Is this logic correct? If so, would the specs on this contactor from Cole Hershee still be a good choice for the starter circuit with the TSIO 550? 24059-08 UL listed Same as 24059, but UL and CE rated. Continuous Rating: 65A at 12V DC. Intermittent rating:750A make, 100A break. 10 sec On, 30 min Off. Circuit G1. Thanks, John From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Frederick Moreno Sent: Thursday, April 26, 2012 4:50 AM To: lml@lancaironline.net Subject: [LML] Re: Contactors vs Solid State Relays Or a traditional mechanical contractor like a Cole Hershee 24115 . A friend is a marine specialist here in Australia and said that for off shore marine applications, only the Cole Hershee contactors are approved because they are mission critical. Much more expensive than the el cheapo auto store contactor I was replacing, but even the auto store guys advocated these units for experimental aircraft because the quality standards are so much higher. The auto stores stocks both types, but many commercial truck customers (we have many in town) will only use Cole Hershee. Made in the UK, I believe. Fred Moreno ------=_NextPart_000_039F_01CD2378.CCBBA670 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Fred.

Sounds like a better choice than we’ve been using.  One = question comes to mind – surrounding the idea I have (is it = correct?) that the starter solenoid should be intermittent because you = want it to be the weak link in the starter circuit:  if the starter = contactors should stick, you’d have a huge amperage draw and maybe = start a fire.  If the contactor is intermittent, it will = theoretically fail and break the contact before the starter motor burns = up and catches fire or causes other damage.

Is this logic correct?  If so, would the specs on this contactor = from Cole Hershee still be a good choice for the starter circuit with = the TSIO 550?

24059-08 UL listed

Same as 24059, but UL and CE = rated.

Continuous Rating: 65A at 12V DC. Intermittent rating:750A = make, 100A break. 10 sec On, 30 min Off. Circuit = G1.

 

Thanks,
John

 

 

 

 

From:= = Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of = Frederick Moreno
Sent: Thursday, April 26, 2012 4:50 = AM
To: lml@lancaironline.net
Subject: [LML] Re: = Contactors vs Solid State Relays

 

 

Or a = traditional mechanical contractor like a Cole = Hershee 24115.

 A friend is a marine = specialist here in Australia and said that for off shore marine = applications, only the Cole Hershee contactors are approved  = because they are mission critical.  Much  more expensive than = the el cheapo auto store contactor I was replacing, but even the auto = store guys advocated these units for experimental aircraft because the = quality standards are so much higher.   The auto stores stocks = both types, but many commercial  truck customers (we have many in = town) will only use Cole Hershee.  Made in the UK, I = believe.

Fred = Moreno

 

 

 

 

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