MSE8000 AC power and current calculation

[terencefoo]

Hi,

Understand that there is a online calculator tool available to determine the power requirements for your MSE 8000 chassis and blades.  The calculator results are in DC power and current.

How do i determine the power and current requirement in AC? Having difficulty understanding and input the values of the rectifier efficiency .

Thanks

Best Regards,

TF

[Martin Koch · Accepted solution]

Without the garantee that this info is without failure:

I assume you are using:

http://www.cisco.com/en/US/docs/telepresence/infrastructure/articles/mse_8000_calculate_power_current_requirements_kb_386.shtml

I think the Valere power supplies have an efficiancy around 90% like the example value,

guess more inefficiant computer power supplies go down to 70%, that is what the power

supply consumes for itself (in other words to heat the room :-)

Btw, the amount of rectifier modules is what you need to power it up, but to be redundant

you need the double amount, in the example below it shows 2 but it should be 2x2, two for each rack.

So with 1x8050 and 4x8510 and 90% you would get something like:

Calculator results

The results are as follows (values are rounded up):

Requirements	Value
DC power (Watts)	1800
DC current (Amps)	38
Number of Valere rectifiers	2

Calculator results for AC power

Using the rectifier efficiency value that you entered above, the AC power and current results are as follows:

Requirements	Value
AC power (Watts)	2000
240V P.S.U. current draw (Amps)	9
110V P.S.U. current draw (Amps)	19

[terencefoo]

Hi Martin,

Thank you very much for the information.

Best Regards,

Terence Foo