[ale] OT need 600-1000W power protection for 3 minutes - cheap

[gcs8]

http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=SMT3000RM2U&total_watts=700
It
should be ok, it also has thermal a shutdown.


On Tue, Jul 9, 2013 at 3:22 AM, Alex Carver <agcarver+ale at acarver.net>wrote:

> On 7/8/2013 22:42, gcs8 wrote:
>
>> new option right at 600 watts
>> http://www.frys.com/product/**6173999?site=sr:SEARCH:MAIN_**RSLT_PG<http://www.frys.com/product/6173999?site=sr:SEARCH:MAIN_RSLT_PG>
>>
>> e bay option ~1KW
>> http://www.ebay.com/itm/APC-**UPS-XS-1500-Battery-Backup-**
>> Power-Supply-BX1500-Tested-**FREE-SHIP-/141012115796?pt=US_**
>> Uninterruptible_Power_**Supplies&hash=item20d4fa2154<http://www.ebay.com/itm/APC-UPS-XS-1500-Battery-Backup-Power-Supply-BX1500-Tested-FREE-SHIP-/141012115796?pt=US_Uninterruptible_Power_Supplies&hash=item20d4fa2154>
>>
>>
>> shop around a little, my suggestion is do math on finding units with no
>> battery and where you can get the batterys local for a good price, I use a
>> 3000kva APC that sits in my rack at the house, I have been thinking about
>> building a bigger battery pack for it but it does its job.
>>
>
>
> One word of caution with this is to make sure the UPS has some type of
> active cooling especially for smaller units that weren't originally
> designed for large battery packs.  Part of the operating thermal budget on
> some of the less expensive, passively cooled systems involved assuming the
> battery pack is a fixed capacity which would run down in a short period of
> high load.  The temperatures would climb inside the inverter but the
> battery dies before the inverter gets too hot.  With a bigger battery pack
> shoehorned in, you reach an overtemperature condition long before the pack
> dies.  The inverter dies instead.  A UPS with active cooling can handle the
> bigger pack.
>
>
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Charles Selfridge

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