Recent content by WattsNew

hgldr...please share the information irrespective if you dont mind. I am interested in looking at it. thanks. :)

Alternatively you can utilize software for power flow like ETAP. Change the project frequency to 400 Hz and when you select 50/60Hz cables from the library, ETAP automatically calculates the new impedance based on 400 Hz. I have seen this application used for shipboard power systems.

Hi Tony, I have done some harmonic simulation in ETAP using VFD's and tested the programs capability of modeling upto 36 pulse VFD using 6 pulse drives. It is fairly simple. I can email you a screen capture of what the circuit would look like for 12,18,24,30 and 36 pulse drives along with the...

Thanks gordon. My email address is apogee1977@hotmail.com

gordonl, Thanks for your input. I am aware of the behavior of sync motor startup. I am looking for actual test data for any size synchronous motor with any characteristic. I need this for my research.

Does anyone have test data or reference that shows plots for synchronous motor starting (using a discharge resistance and then applying the excitation? Thanks in advance

Does any one know how to calculate generator I2^2 t curve for coordination purposes? I know that K varies between 2 - 40 and I2 is percent of stator FLA. What percent of FLA is used to draw the curve? Hope the question makes sense. Thanks in advance

I read HiSets comments and the ETAP ARTTS works with a laptop computer and can test almost 24 different IEEE types of relays. Quite lightweight too, weighs in about 18 kgs.

Hi Deansharafi Omicron and Doble are very expensive. You might want to look at ETAP ARTTS which is a secondary injection test set I have used and works real well because it allows upto 9 CT inputs and interfaces with the ETAP coordination program. The best thing is service is available in the...

You can refer to www.etap.com/psms for analyzing electrical operating data. I am not sure if vibration data is handled by them also?

You might want to use standard softwares like ETAP that comply with IEEE 80-2000 to save you a lot of iteration time. Knowledge of 3Io LG fault current and X/R ratio is required.

What is the nameplate kVA of the transformer? ETAP actually has typical %Z and X/R values for any nameplate transformer. I can get you the values from there.

I have used ETAP on a number of projects. It is fairly simple to use and offers IEEE and FEM Methods. www.etap.com

Hi jbartos, Thanks for the links. I will have to scan through the softwares mentioned. Essentially what I am looking for is a way to model the electrical network for a transit system and then simulate acceleration / deacceleration of trains based upon their schedule. Thanks

Hello All, Does anyone know of a Standard which talks about Moving Train Analysis or a software that does it? Thanks in advance