DCO 8.1 - single phase ups and 2 pole 208 breakers

DCIM_Support · ‎2020-07-03

This question was originally posted on DCIM Support by Andrew Trabert on 2017-09-15

I have a project coming up and need to model a 8kva single phase UPS' and power path. I know I need to use floor mount units, however when I tried to use a 2 pole 208 breaker on the PDU, it doesn't show up, only the single pole breaker does. I did set the pdu output voltage to 208/60.

The only work around seems to be to use a 3ph UPS & PDU and only use 2 phases.

Does anyone else have any other suggestions?

DCIM_Support · ‎2020-07-03

This answer was originally posted on DCIM Support by Gert Lehmann on 2017-09-26

In the genomes you can create a single pole breaker with the size of 2 (just copy the exiting 1P breaker) and use that, it will then look like (and occupy the same space as) a 2 pole breaker.

Since DCO does not consider the pole count for single phase UPS's, this solution will work just similar to having an actual 2 pole breaker.

I would not recommend using a 3 phase UPS, because it is always going to result in having non-utilized capacity on the power phase not used, which means the capacity calculations are going to be wrong.

The only case where using a single phase UPS would not work, is if the actual UPS is a split-phase-UPS, e.g. it has 2 phases + neutral as output, because it would then both have 120V and 208V outputs which you cannot do with a single phase UPS in DCO.

Regards

Gert

See Answer In Context

DCIM_Support · ‎2020-07-03

This comment was originally posted on DCIM Support by Ditte Drewer Mathiasen on 2017-09-18

Hi Andrew Trabert, thanks for posting.

Let's hope you find your answer here.

Kind regards Ditte

DCIM_Support · ‎2020-07-03

This answer was originally posted on DCIM Support by Gert Lehmann on 2017-09-26

In the genomes you can create a single pole breaker with the size of 2 (just copy the exiting 1P breaker) and use that, it will then look like (and occupy the same space as) a 2 pole breaker.

Since DCO does not consider the pole count for single phase UPS's, this solution will work just similar to having an actual 2 pole breaker.

I would not recommend using a 3 phase UPS, because it is always going to result in having non-utilized capacity on the power phase not used, which means the capacity calculations are going to be wrong.

The only case where using a single phase UPS would not work, is if the actual UPS is a split-phase-UPS, e.g. it has 2 phases + neutral as output, because it would then both have 120V and 208V outputs which you cannot do with a single phase UPS in DCO.

Regards

Gert

DCIM_Support · ‎2020-07-03

This comment was originally posted on DCIM Support by Andrew Trabert on 2017-09-26

Thank you! That solution will work since these are not split phase ups', and as far as I know, they do not have a step down transformer (however I guess that could be modeled as a separate pdu).

Is it currently on the roadmap/or is there an enhancement request to add 120/208 output from a single phase UPS'?

DCIM_Support · ‎2020-07-03

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