Power panels with 230V voltage output?

DCIM_Support · ‎2020-07-02

Hello everybody.

I finding some issues to get the proper power values in a power path that I set up on DCO 7.4.

I'm trying to connect a power panel (input : 104A, 400V, 50hz, 3phase) with an APC rackPDU (model AP8653, using a generic one because the genome doesn't come in the library) that distributes one phase power to the loads in the rack (230V). The rack pdu is conected to the power panel using a 32A L1-L2 phase breaker.

I can't find the proper values in the power panel to select a power output voltage of 230v/50hz, the only values are for three phase.

Using a 400V voltage output for the power panel I'm getting wrong capacity values in the rack (it shows 10kW when should be around 6 kW). The output voltage value is set in 230v, 50hz, one phase.

I don't know if I am missing something between the two elements (power panel and rPDU) or if I did something wrong.

Thanks.

DCIM_Support · ‎2020-07-02

Hi Manuel,

You are on the right track. You have set the right input voltage on the Power Panel namely 3PH 400V/50Hz. Also the voltage for the rPDU is correctly set to 230V/50Hz. The result you are seeing is due to the fact that you have connected a 2 phase line-to-line breaker between the power panel and the rPDU. You need to connect a single phase breaker.

If you have a Line-to-Line breaker, the value you will see will equal 0.8 * 32A * sqrt (3) * 1 * 230v which is approximately 10kW.

If you have a Line-to-neutral breaker, the watts you will see will equal 0.8 * 32A * 3 *1 *230v which equals approximately 6kW.

(Operation is using a power factor of 1 and a derating of 0.8 - the latter can be set in the preferences)

In your example it implies that you need to use a single phase 32A Breaker connected to e.g. L1

Best Regards

Anders

PS. AP8653 is included in the next release of DC Operation.

See Answer In Context

DCIM_Support · ‎2020-07-02

Hi Manuel,

You are on the right track. You have set the right input voltage on the Power Panel namely 3PH 400V/50Hz. Also the voltage for the rPDU is correctly set to 230V/50Hz. The result you are seeing is due to the fact that you have connected a 2 phase line-to-line breaker between the power panel and the rPDU. You need to connect a single phase breaker.

If you have a Line-to-Line breaker, the value you will see will equal 0.8 * 32A * sqrt (3) * 1 * 230v which is approximately 10kW.

If you have a Line-to-neutral breaker, the watts you will see will equal 0.8 * 32A * 3 *1 *230v which equals approximately 6kW.

(Operation is using a power factor of 1 and a derating of 0.8 - the latter can be set in the preferences)

In your example it implies that you need to use a single phase 32A Breaker connected to e.g. L1

Best Regards

Anders

PS. AP8653 is included in the next release of DC Operation.

DCIM_Support · ‎2020-07-02

Thanks so much it worked!

I was using the wrong breaker. I changed it and know the capacity values are correct.

Maths always tell the truth.....😀

DCIM_Support · ‎2020-07-02

I'm glad you got your problem solved :-)

DCIM_Support · ‎2020-07-02

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