UPS sizing for server hardware
Dear Experts
We have mounted 2 nos of Dell Poweredge R730 with dual hot plug, redundant power supply (1+1) 750W and one L3 switch and one router to expect 4 hours power backup how much capacity UPS is required i,e 750W * 4 = 3000W and other network equipment's Router, L3 swtich auraba in total 3500W not sure if this how to calculate please suggest how much capacity of UPS required and for the backup of 4 hours and also how much capacity of power socket 15Amps or 20Amps for the power chords to connect.
please suggest
We have mounted 2 nos of Dell Poweredge R730 with dual hot plug, redundant power supply (1+1) 750W and one L3 switch and one router to expect 4 hours power backup how much capacity UPS is required i,e 750W * 4 = 3000W and other network equipment's Router, L3 swtich auraba in total 3500W not sure if this how to calculate please suggest how much capacity of UPS required and for the backup of 4 hours and also how much capacity of power socket 15Amps or 20Amps for the power chords to connect.
please suggest
SOLUTION
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Oops, scratch the second link, it's ancient. http://www.dell.com/calc is for the modern servers.
If you want 4 hour backup, rate the configuration for at least 6 hours. Nobody maintains UPS batteries properly. The usual situation is "Ah, leave it alone until the UPS says it can't charge it any more" and when that occurs the runtime may be down to a few minutes. UPSes should be periodically tested at the full expected load.
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ASKER
Thanks one and all for the valuable reply, at present I have 2KVA UPS. the newly procured UPS if connected all the PSU's of both the servers that becomes 750W * 4 and 03 network requirements all put together approx 1850W will this take the load please suggest or we have to go for one more 1 KVA and each one of PSU connect to this 1KVA please suggest.
2KVA should power everything, assuming typical configurations. A 2KVA UPS, however, is not going to last anywhere near 4 hours. If the UPS has a connector and additional battery packs are available, then adding a few of those might get you there.
A 2KVA UPS is almost certainly "smart", it will come with some sort of utility and a serial or USB connection. You can use the utility to see how much power is being drawn, battery capacity, estimated runtime etc.
A 2KVA UPS is almost certainly "smart", it will come with some sort of utility and a serial or USB connection. You can use the utility to see how much power is being drawn, battery capacity, estimated runtime etc.
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ASKER
Thanks for the reply, request please help me understand following 2 scenario
1. if we connect PSU1 of server to UPS1 and PSU2 of same server to UPS2 on which power source the server will be running is it through UPS1 or UPS2, or equally power will be drawn form both UPS
Similarly if connect PSU1 to UPS1 and PSU2 of same server to direct main source now server will be running on which power source while I understand in total server takes 750W
1. if we connect PSU1 of server to UPS1 and PSU2 of same server to UPS2 on which power source the server will be running is it through UPS1 or UPS2, or equally power will be drawn form both UPS
Similarly if connect PSU1 to UPS1 and PSU2 of same server to direct main source now server will be running on which power source while I understand in total server takes 750W
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ASKER
thank you very much for the reply, I am really interested to set one PSU as primary let it take most of the power from it and secondary to take less until primary fails, how to configure this can you please give me steps or link please.
The link is up there ^^
ASKER
thank you so much will go through
for the backup of 4 hours and also how much capacity of power socket 15 Amps or 20 Amps for the power cords to connect.
to be realistic for more than 1 hour you need a generator, in my locale we use natural gas generators which kept our call center online during the 2003 blackout
to be realistic for more than 1 hour you need a generator, in my locale we use natural gas generators which kept our call center online during the 2003 blackout