how to hook up this UPS

[electrofelon]

I have a three pole 30A fused safety switch that feeds a 27KW 400V UPS. The output of the UPS then feeds three fused safety switches. I am not thrilled with the connection on the back of this thing. Recommendations? SO cord? Greenfield? What is that mini strut thing? Where can I get clamps for it?

 

[electrofelon]

Also, what does R,S, and T mean for the phases? I assume that is common designation for 400/230 systems?

 

[SSDriver]

RST is European for L1, L2,L3. What are the dimentions of the channel? Looks similar to t-track

 

[electrofelon]

RST is European for L1, L2,L3. What are the dimentions of the channel? Looks similar to t-track

Not sure , but I can measure tomorrow. Probably about the width of your thumb. This needs to be up and running in a few days, guess I could zip tie the cord or raceway yo that channel for now.

 

[winnie]

Looks like 'C section' DIN rail

DIN rail - Wikipedia

en.m.wikipedia.org

Looks like it is mounted to the enclosure using standoffs.

I'd probably change it to a similar sized rail I could buy from McMaster, and then use clamps for that.

Or perhaps replace the rail with a simple metal shelf with a couple of punched holes for Greenfield or cable clamps.

I presume there is a cover that goes over the terminals.

Jon

 

[SSDriver]

Not sure , but I can measure tomorrow. Probably about the width of your thumb. This needs to be up and running in a few days, guess I could zip tie the cord or raceway yo that channel for now.

If it is standard t track you can buy t track nuts at mcmaster or Amazon and bolt conduit hangers to it. Some t-track you can slide 1/4" bolts directly in the track and now you have a stud. Or slide a 1/4-20 nut and bolt a hanger to it.

 

[electrofelon]

Looks like 'C section' DIN rail

DIN rail - Wikipedia

en.m.wikipedia.org

Looks like it is mounted to the enclosure using standoffs.

I'd probably change it to a similar sized rail I could buy from McMaster, and then use clamps for that.

Or perhaps replace the rail with a simple metal shelf with a couple of punched holes for Greenfield or cable clamps.

I presume there is a cover that goes over the terminals.

Jon

If it is standard t track you can buy t track nuts at mcmaster or Amazon and bolt conduit hangers to it. Some t-track you can slide 1/4" bolts directly in the track and now you have a stud. Or slide a 1/4-20 nut and bolt a hanger to it.

Yeah I like the idea of a "shelf" to cap off the bottom and punch some ko's and terminate the raceways on.....but I didn't have time for that art project.

What I ended up doing is replacing that mini strut thing with unistrut and using strut clamps. Came out ok.

 

[tortuga]

Does that UPS unit also drop the voltage from 480/277 to 400/230 ?

 

[electrofelon]

Does that UPS unit also drop the voltage from 480/277 to 400/230 ?

No, we have a 240 Delta to 230/400v transformer before the UPS. The UPS input voltage does go down as low as 208, but the voltage required goes up as the load increases.