homelab

6602 readers

1 users here now

founded 4 years ago

MODERATORS

CMonster@lemmy.ml

UPS C20 input amp requirements. (lemmy.ml)

submitted 1 year ago by jsnfwlr@lemmy.ml to c/homelab@lemmy.ml

4 comments fedilink hide all child comments

I am looking to replace two Powershield 1600VA UPS that I have sitting, inaccessible, at the bottom of my 12U under-desk rack, and I am hoping that a 3000VA 2U rack mount UPS will work for me. I have a windows workstation and a Linux server each in a in 4U case that need backup power. They currently stay up for about 40 minutes on the Powershield UPS if I am not (foreground) active on them.

Now comes the part I need help with - I've looked at datasheets, installation guides, and system specifications for about 20 different UPS that meet my above wish list all of which have IEC C19 input sockets, and none of the technical documents tell me what amperage I need for the supply. My home office is limited to 10A (Australian) GPOs, so I am hoping these UPS will work with that, so I don't need to get an electrician out to run a new circuit.

Any help and or advice would be greatly appreciated. TIA

top 4 comments

sorted by: hot top controversial new old

[–] e_t_@kbin.pithyphrase.net 2 points 1 year ago (2 children)

Divide 3000VA by your line voltage to get the required amps. Here in the States, I'd need a 30A circuit at 120V and would absolutely have to run a new line from my breaker panel.

[–] jsnfwlr@lemmy.ml 1 points 1 year ago* (last edited 1 year ago) (1 children)

I have 220~240v, so that means I need > 14A then

Edit: hang on - that's only true if the UPS recharges in exactly 1 hour. If it charges over two hours it needs less power

[–] e_t_@kbin.pithyphrase.net 0 points 1 year ago

But it can draw more current than the line is rated for. Everything electrical is about "can", not "will".

[–] Grandsinge@lemmy.zip 1 points 1 year ago

Yep, I have a 3000va unit in my main basement rack. I had to run a 30A circuit for it.