Search results for query: *

The equipment wasn't specified yet so chokes/filters can be added if needed

Hi, I'm designing a pilot project for energy storage unit based on an induction generator coupled with a frequency drive. there are also several large motors driven by VFDs as well so we are talking about approximately 2300kVA peak load on the transformer. the problems are: 1. load varies...

Just to clear up things, A 12MW generator at 0.69kV, PF of 0.9 will have a current of 11.2kA. For 8MW it would be 7.5kA. In any case these currents are larger than the biggest LV breaker available so as I see it there is no way to protect the converter and the generator on the LV side except...

it's possible that the ABB 8MW unit consists of 2X4MW modules but at the end you only have 1 generator in a wind turbine. maybe this is only a catalog item that doesn't exist in the real world.

for some reason I remember seing 12MW but I can't seem to find it now. anyway, ABB have a converter for up to 8MW: https://library.e.abb.com/public/25e19011bbcd4f2782f4b2c8271072af/Wind_converter_catalog_3AUA0000231755_RevA_EN.pdf this is still an enormous current.

Hi Colleagues, Today wind turbines can go up to even 12MW at low voltage - 0.69kV. this sounds very challenging with regards to low voltage equipment. how would a connection of a 12MW generator look like? at 0.69kV we are talking about 12kA current. biggest LV breaker and LV bus I know are...

I'm quite familiar with the PMG configuration on the same shaft with the regular synchronous generator from my previous experience on geothermal power plants. PMSG and PMG are the same thing. you are correct that PMSG is a recent term used in the wind turbine field. At the bottom line, the...

thank you. I'm wondering if this kind of application makes sense over a PMSG. would it be possible to use this kind of installation with a regenerative converter like in wind turbines that usually use an induction machine or a PMSG. Also, how would you determine what is the optimal excitation...

Hi All, The question is regarding an electrically excited synchronous generator. Consider that this generator is not connected to the grid and thus not locked with the grid frequency. This generator is spinning at variable speed and gets constant and similar excitation current meaning that the...

thanks for the answers! I like the idea of using the terminal. I read through the manual of SEL700G but couldn't find a command that shows the voltage/current/frequency etc. readings

I want to connect to 2 SEL700G relays at the same time to monitor their readings online. I can't seem to be able to open 2 instances of the quickset software. any suggestions?

the question is if there is a preferred practice or some kind of law/rule on this matter?

Yes the cable is directly buried. removing the cable is a good option but not always practical/cost effective.

Hello, I'm looking to standardize a practice for cable abandoning in my company. is there any common practice for this? I'm specifically interested in cables that were cut at the end point (at a transformer terminals for example). do you short the phases? do you ground the phases? maybe both...