On Tue, 2008-12-02 at 11:43 +0100, Carlos E. R. wrote:
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On Tuesday, 2008-12-02 at 09:29 +0100, Hans Witvliet wrote:
... [dc power]
When ordering servers from HP, you can specify whether you want AC-power adapters (110 - 230Vac) or 48Vdc-apapters.
Only catch is that you have to be carefull that in telco-stuff the plus is grounded, while other equipment (like RF-transmission) use negative-grounding.
Unless you are fond of sparks and welding, you're in for a nasty surprice..
A coworker once fell down from a... what do you call it, a portable stairs, when he was connecting power at a exchange, with a screwdriver on his hands. This fell across the two naked dc lines... after some sparks an entire island resulted without cellular coverage for some hours :-}
I wonder, those servers you mention, can be adapted to both type of grounding? And how is the price compared to ac power unit, if you remember? Not a figure, just curious to know if they are more expensive or not.
Hi, At my previous job, one of my friends dropped a screwdriver on those copper bars. Slight hickup, but after a moment the screwdriver was melted... AFAIR, both versions oft the psu were expensive, well, you you what the abbreviation HP means: High Priced ;-) Not sure about the grounding, execpt that they sell dedicated Microsoft-versions, that have both types of grounding combined... At my current positions they use inverters for each 19" cabinet and a couple of their own generators -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org