Comments on: Reader Find: The Kill-a-Watt http://toolmonger.com/2006/12/21/reader-find-the-kill-a-watt/ All tools. All the time. Your source for news, information, and reviews of hand tools, power tools, and tools of all kinds. Sat, 22 Nov 2008 16:55:35 +0000 http://wordpress.org/?v=2.6.1 By: Toolmonger » Blog Archive » Dealmonger: Kill A Watt Electricity Usage Detector http://toolmonger.com/2006/12/21/reader-find-the-kill-a-watt/#comment-47237 Toolmonger » Blog Archive » Dealmonger: Kill A Watt Electricity Usage Detector Fri, 06 Apr 2007 15:58:12 +0000 http://toolmonger.com/2006/12/21/reader-find-the-kill-a-watt/#comment-47237 [...] Here’s another Toolmonger item from way back that’s a good deal right now: Meritline has the Kill-A-Watt listed for $20 right now — about $2-$3 cheaper than normal – and while we did find it for $18 from one other mail-order-only shop, Meritline beats ‘em out on shipping.  [...] [...] Here’s another Toolmonger item from way back that’s a good deal right now: Meritline has the Kill-A-Watt listed for $20 right now — about $2-$3 cheaper than normal – and while we did find it for $18 from one other mail-order-only shop, Meritline beats ‘em out on shipping.  [...]

]]> By: clinical course with zocor toxicity http://toolmonger.com/2006/12/21/reader-find-the-kill-a-watt/#comment-29956 clinical course with zocor toxicity Tue, 06 Mar 2007 11:18:54 +0000 http://toolmonger.com/2006/12/21/reader-find-the-kill-a-watt/#comment-29956 <strong>clinical course with zocor toxicity</strong> clinical course with zocor toxicity

]]> By: Myself http://toolmonger.com/2006/12/21/reader-find-the-kill-a-watt/#comment-8297 Myself Thu, 21 Dec 2006 22:56:18 +0000 http://toolmonger.com/2006/12/21/reader-find-the-kill-a-watt/#comment-8297 Whoops, I sure wasn't very clear was I? Of course the degree of phase lag depends on the load's reactive component, and a purely resistive load will have none at all. Thanks for catching that. :) Most home users will never need to know their power factor anyway. Just generously oversize any UPS purchases and it's not an issue. Commercial power customers, on the other hand, are usually billed for reactive power, so they definitely want their switchmode power supplies to be power-factor corrected, etc. Whoops, I sure wasn’t very clear was I? Of course the degree of phase lag depends on the load’s reactive component, and a purely resistive load will have none at all. Thanks for catching that. :)

Most home users will never need to know their power factor anyway. Just generously oversize any UPS purchases and it’s not an issue. Commercial power customers, on the other hand, are usually billed for reactive power, so they definitely want their switchmode power supplies to be power-factor corrected, etc.

]]> By: SuperJdynamite http://toolmonger.com/2006/12/21/reader-find-the-kill-a-watt/#comment-8267 SuperJdynamite Thu, 21 Dec 2006 19:08:29 +0000 http://toolmonger.com/2006/12/21/reader-find-the-kill-a-watt/#comment-8267 "but in AC, a phase lag between the voltage curve and the current curve causes non-unity power factor, which is why your computer’s UPS might be rated to drive 700VA but only 450 watts." That's actually dependant on load. In some applications, such as a light bulb, current and voltage would be in phase. “but in AC, a phase lag between the voltage curve and the current curve causes non-unity power factor, which is why your computer’s UPS might be rated to drive 700VA but only 450 watts.”

That’s actually dependant on load. In some applications, such as a light bulb, current and voltage would be in phase.

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