X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao04.cox.net ([68.230.241.35] verified) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTP id 937470 for flyrotary@lancaironline.net; Mon, 09 May 2005 13:47:15 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.35; envelope-from=ALVentures@cox.net Received: from BigAl ([68.7.14.39]) by fed1rmmtao04.cox.net (InterMail vM.6.01.04.00 201-2131-118-20041027) with ESMTP id <20050509174626.MRXT23392.fed1rmmtao04.cox.net@BigAl> for ; Mon, 9 May 2005 13:46:26 -0400 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: EC2 redundancy Date: Mon, 9 May 2005 10:46:37 -0700 Message-ID: <000801c554bf$0c8ea990$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0009_01C55484.60324290" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 In-Reply-To: Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_0009_01C55484.60324290 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit > > We are protecting against a defective fuse such as Paul had or a direct > short in one of the lines that has blown a good fuse. The other line will > continue to operate the EC2 if you have diodes to prevent a backfeed. Of > course you wish to separate the wires to prevent the burning one from > destroying the 2nd one. > > Bernie > If one line is shorted and they are tied together in the box, then both lines - fuses or breakers - will see the short fault and trip. Wendell Wendell; That's what the isolation diodes prevent; except for the case where the short is inside the box. Al ------=_NextPart_000_0009_01C55484.60324290 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

>

> We are protecting against a defective fuse such as Paul had or a = direct

> short in one of the lines that has blown a good fuse. The other line = will

> continue to operate the EC2 if you have diodes to prevent a backfeed. = Of

> course you wish to separate the wires to prevent the burning one = from

> destroying the 2nd one.

>

> Bernie

>

If one line is shorted and they are tied together in the box, then = both

lines - fuses or breakers - will see the short fault and = trip.

 

Wendell

 

Wendell;

 <= /font>

That’s = what the isolation diodes prevent; except for the case where the short is inside = the box.

 <= /font>

Al =

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