can SURT5000XLT be connected to split phase 240V

[Anonymous user]

Hi all,
I read in the manual that the SURT5000XLT can be programmed to accept 240V instead of (the 2 phase) 208V.

But it doesn't say in the manual if it can it be used with a split phase 240V?

The building has only 2x120 (i.e. split phase).

Can it be done? Has anybody tried?

Thanks!

[BillP]

yes, you can do that. the UPS just cares that it has 240v input (assuming you meant you have 2 hots and a ground connection available). then, you need to configure the UPS and tell it you are inputting 240. the only note is that then it will not output 240 split phase so don't expect that.

[Anonymous user]

Hi,
the building has 2x120V (split phase) as mentioned.
By using the two "hot" ends (let's call them V1 and V2) you get 1x240V.

Split-phase is used in the US for homes and very small businesses.
see
http://en.wikipedia.org/wiki/Split-phase_electric_power

This building was a hotel and was transformed into individual businesses.

From what I understand these UPS rectify whatever they get into DC, and convert that DC into AC.
Their input can be anywhere form 160V upto 270V (AC).

So my question is if it would work if I simply connect the one phase input of the UPS to V1 (the one end of the split phase), and it's other input to V2 (the other end of the split phase).

So the UPS still "sees" the full potential of 240V on its inputs.

If if we take it technically:
I don't know if the internal capacitors -which store the DC energy- are capable to fill in for the missing timeshifted second phase or not.

I would not draw the full power from this UPS, maybe around 1.5KW at maximum.

Would that work?

Thanks!

[BillP]

the 240v input should be two phases of 120v that are 180º out of phase. i think that what you are describing will fine as long as you input a ground connection with it.

[Anonymous user]

Thanks for that!

[BillP · Accepted solution]

no problem 🙂