From owner-freebsd-questions@FreeBSD.ORG Tue Oct 15 08:34:45 2013 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTP id 17B24A5D for ; Tue, 15 Oct 2013 08:34:45 +0000 (UTC) (envelope-from erich@alogt.com) Received: from alogt.com (alogt.com [69.36.191.58]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id E14192C9E for ; Tue, 15 Oct 2013 08:34:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=alogt.com; s=default; h=Content-Transfer-Encoding:Content-Type:Mime-Version:References:In-Reply-To:Message-ID:Subject:Cc:To:From:Date; bh=VR3zsZ6K/E2XKjzHjkksfkq13tRAS/RxRbRPOGZWvuI=; b=aYkwPs7iIjlRdzHAkFgyKMSwiLWoZzuKLjbByX0m/XF5n9+fdEB2gntgmXDEcA+b+zptkiqp7BeelGxeymQxM2hfGDs5SVVrX5GFr4Fdcjvqds8jThnFTiD7/7i1eXK0zSh2PRocHS30l6kVPisDj+6Slt5FKE6102clWuDjFwA=; Received: from [182.0.242.251] (port=48069 helo=X220.ovitrap.com) by sl-508-2.slc.westdc.net with esmtpsa (SSLv3:DHE-RSA-AES128-SHA:128) (Exim 4.80.1) (envelope-from ) id 1VW05S-000513-0N; Tue, 15 Oct 2013 02:34:43 -0600 Date: Tue, 15 Oct 2013 16:34:34 +0800 From: Erich Dollansky To: yudi v Subject: Re: UPS buying suggestion Message-ID: <20131015163434.5834988c@X220.ovitrap.com> In-Reply-To: References: <20131015134826.528289be@X220.ovitrap.com> Organization: ALO Green Technologies X-Mailer: Claws Mail 3.9.2 (GTK+ 2.24.19; amd64-portbld-freebsd10.0) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - sl-508-2.slc.westdc.net X-AntiAbuse: Original Domain - freebsd.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - alogt.com X-Get-Message-Sender-Via: sl-508-2.slc.westdc.net: authenticated_id: erich@alogt.com X-Source: X-Source-Args: X-Source-Dir: Cc: freebsd-questions@freebsd.org X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 15 Oct 2013 08:34:45 -0000 Hi, On Tue, 15 Oct 2013 17:35:04 +1000 yudi v wrote: > yes, but it does not tell you how long the UPS will be able to support > > > the 400W. It sounds to me that > > > > I only need it to shutdown the system cleanly, so I am guessing less > than 5mins is more than enough. this should work but interrupts the current work. I live and work in a region where short power failures are normal. Shutting down for them would create to much of an interruption. > > > > As you need the current anyway, I would use an ampere meter to > > determine the exact current drawn. I got already some surprises > > there. > > > > I would sugggest an UPS above 1000VA. I have currently this in use: > > > > > > I think 1000VA is overkill for a little server, I am going to get > > this > power monitor > and > see what the exact numbers are and then decide. > > Read about the 'power factor'. The power meter will show you the actual W consumed by the device but not the VA that your UPS will have to deliver. This does normally not really matter except when you come close to the limits of the device supplying the electricity. Erich