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Ac Power Problem


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#1 resr

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Posted 12 March 2007 - 09:04 AM

One question: can power oscillation damage my computer hardware, like motherboard, processor or sound card, if it is going from 240VAC to 170VAC and there is a sound amplifier based on tda1554q connected to the sound card?
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#2 dc3

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Posted 12 March 2007 - 09:46 AM

If it is a brief brownout you should be alright.

This is an excerpt from an article on PSUs.

Events Causes Effects
SAGS
Also known as brownouts, sags are short-term decreases in voltage levels. This is the most common power problem. Typically caused by the start-up power demands of many electrical devices (including motors, compressors, elevators, shop tools, etc.) sags are also the electric utilities' means of coping with extraordinary power demands. In a procedure known as "rolling brownouts" the utility will systematically lower voltage levels in certain areas for hours or days at a time. A sag can "starve" a computer of the power it needs to function, causing frozen keyboards and unexpected system crashes with the end result being the loss or corruption of data. Sags also reduce the efficiency and life span of electrical equipment, particularly motors.

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#3 stevealmighty

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Posted 12 March 2007 - 10:05 AM

Just to expand a bit on what dc3 had mentioned, yes, it can damage your system. Most typically, it will do more damage if a system is overloaded, but it could also cause damage if it's not getting enough power. Most power supplies will prevent damage to a computer by either popping a fuse/circuit or just flat out dying (cheaper to replace a single psu then an entire system).

You could get a UPS (Uninterrupted Power Source) that will regulate the voltage (a ups that conditions also). This will help to regulate the voltage that is going into your computer. Most (if not all) ups's will also act as a surge protector too. When the voltage drops to below 240, the ups will boost it back up to 240 via a battery. If it surges above 240, the ups will cut the power from the outlet, and power your computer via the battery. If power goes out, the ups will continue to power your computer (not really long though, it varies by the psu, but long enough for you to save your work and power down the computer).

Hope this helps! :thumbsup:
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