X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 22 Feb 2010 08:09:19 -0500 Message-ID: X-Original-Return-Path: Received: from [69.84.129.234] (HELO asp.reflexion.net) by logan.com (CommuniGate Pro SMTP 5.3.2) with ESMTPS id 4132378 for lml@lancaironline.net; Sat, 20 Feb 2010 23:07:09 -0500 Received-SPF: none receiver=logan.com; client-ip=69.84.129.234; envelope-from=cberland@systems3.net Received: (qmail 15687 invoked from network); 21 Feb 2010 04:06:34 -0000 Received: from unknown (HELO mail-cs-02.app.dcb.reflexion.net) (10.84.19.2) by 0 (rfx-qmail) with SMTP; 21 Feb 2010 04:06:34 -0000 Received: by mail-cs-02.app.dcb.reflexion.net (Reflexion email security v6.10.1) with SMTP; Sat, 20 Feb 2010 23:06:33 -0500 (EST) Received: (qmail 25582 invoked from network); 21 Feb 2010 04:06:33 -0000 Received: from unknown (HELO remote.systems3.net) (98.172.79.178) by 0 (rfx-qmail) with (AES128-SHA encrypted) SMTP; 21 Feb 2010 04:06:33 -0000 Received: from S3SBS08SERVER.Systems3.local ([fe80::6077:364b:fa39:c71b]) by S3SBS08SERVER.Systems3.local ([fe80::6077:364b:fa39:c71b%10]) with mapi; Sat, 20 Feb 2010 21:06:32 -0700 From: Craig Berland X-Original-To: Lancair Mail List X-Original-Date: Sat, 20 Feb 2010 21:06:30 -0700 Subject: Field Circuit Breaker Popping Thread-Topic: Field Circuit Breaker Popping Thread-Index: Acqyqz+IoM5dwQXpRFabdu4mjUqm+Q== X-Original-Message-ID: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-cr-hashedpuzzle: CFSL CJH4 Cv/6 C/R+ DazH EW+P Elz5 E14h FqDB GPAW GjTz G/Tj HmPr HnZL IU5A IwLk;1;bABtAGwAQABsAGEAbgBjAGEAaQByAG8AbgBsAGkAbgBlAC4AbgBlAHQA;Sosha1_v1;7;{E0366C73-25FB-4293-B81E-FF9F67A69CB4};YwBiAGUAcgBsAGEAbgBkAEAAcwB5AHMAdABlAG0AcwAzAC4AbgBlAHQA;Sun, 21 Feb 2010 04:06:30 GMT;RgBpAGUAbABkACAAQwBpAHIAYwB1AGkAdAAgAEIAcgBlAGEAawBlAHIAIABQAG8AcABwAGkAbgBnAA== x-cr-puzzleid: {E0366C73-25FB-4293-B81E-FF9F67A69CB4} acceptlanguage: en-US Content-Type: multipart/alternative; boundary="_000_D7A6B5700A0803448C27264F1F5387363F515776C8S3SBS08SERVER_" MIME-Version: 1.0 --_000_D7A6B5700A0803448C27264F1F5387363F515776C8S3SBS08SERVER_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable As you may remember a few weeks ago I reported my IV-P TSIO 550 with a Con= tinental 100 amp alternator B&C voltage regulator system was popping the = field 5-amp circuit breaker in flight after 15-30 minutes. Many of you gav= e me good suggestions as I looked for the solution. Thanks... The problem = was finally found and it was caused by a burr internal to the alternator wh= ich rubbed through the wire insulation in the diode pack. I assume as the = engine vibrated, randomly the chaffed wire would arc to the alternator case= and create a voltage spike in the system and the B&C crowbar circuit would= trip the field circuit breaker. The alternator was replaced and the probl= em is gone. Craig Berland IV-P N7VG --_000_D7A6B5700A0803448C27264F1F5387363F515776C8S3SBS08SERVER_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

As you may remember a few weeks ago I reported m= y IV-P TSIO 550 with a Continental 100 amp alternator B&C voltage regulator system was popping the field 5-amp circuit breaker in flight afte= r 15-30 minutes. Many of you gave me good suggestions as I looked for t= he solution. Thanks… The problem was finally found and it was caus= ed by a burr internal to the alternator which rubbed through the wire insulati= on in the diode pack. I assume as the engine vibrated, randomly the chaffed wire would arc to the alternator case and create a voltage spike in the sys= tem and the B&C crowbar circuit would trip the field circuit breaker. = The alternator was replaced and the problem is gone.

Craig Berland

IV-P N7VG

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