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I am looking for a transmission protection and Control training in Canada or US. Someone refered me to this course offred by Univirsitry of Wisconsin. Has anyone attended this course who can provide a feedback? http://epdfiles.engr.wisc.edu/pdf_web_files/epd/P018.pdf Thank you

I always thought that the CT accuracy class defines the metering or protection class and not the Burden. A 600/5 CT with B=0.1 is used for protection in this case.

how the saturation time of a CT is being calculated? for example a 600/5 ratio with a B=0.1

One of our customers is upgrading their electrical system by replacing a 2.5MVA transformer to 5 MVA transformer ( 27.6kV primary). I am wondering if there is a CEC requirement to install a breaker on the primary side of the new transformer instead of a disconnect switch? Thanks for all feedbacks

We are designing a 230kV substation and wondering if there are any code/standard requirements in Canada to provide certain horizontal distance from de-energized parts a 230kV substation equipment ( such as A-Frame) to the substation fence?

GPR level is acceptable. Step and touch are not within the limits, so my question is whether modeling the existing substation ( which is taking a long time) and connecting it to the existing grid would change the S&T potentil values of the new subtation or as pwrtran indicated we just have to...

We are building a small substation ( including a transformer and a padmount switchgear) in adjacent to a wind farm substation and connecting the new substation ground grid to the existing grid. The existing grid has a measured grid resistance of .5 ohms. we are using Cymgrd to model our...

We are working on a project and need to define typical ( conservative ) impedance values for Delata-Wye and Wye-G, Wye-G, Delta transformers. Transformers are 18/25/30 Mva 230kV/34.5 kV. Where can I find these typical values? I apprecite your responces.

CEC suggests specific arrangements for underground cable installations in section B4. I am working on a design which specifies 6C/phase cables in 6 conduits. Our preferred arrangement to accommodate installation flexibility is to have all phase-A, B and C cables installed in one duct bank...

Mgtrp, the entire temp. Fence will be inside the existing substation. When you say it may be metal, do you mean it must be metal and must be grounded?

Can wooden fence be used as a temp. Fence on portion of a substation? Do we have to follow all grounding rules if a metal fence is used? Thanks

Great feedbacks. Thank you all

Makes sense.It seems that there is no clear definition between engineers for percentage submittals.

Thanks disk I am specifically interested to know based on what criteria 30-60-90% submissions are defined? Level of detail? Or customer defines it?

Are there any references to size Cables for DC applications? I know that cable size should be smaller.

We are new to consulting industry and am wondering how the 30-60-9% submittals are being defined? I am referring to issuing engineering drawings for customer review. Thanks

Waross, I was expecting more of calculation based approach than gaining experince by try to see if it works. I'll start with relay default values as a start point. Thanks afor all replies

That's a true statement Stevenal However, we are checking for "Not" sync situation for any reason.

cranky108, what study would determine these criteria? would that be a transient switching study? I agree that relay manufacturers default values would be the first step, (in this case SEL 751) however I appreciate your experince on this subject? Thanks

Our customer is going to use a switchgear to perform a paralleling function of two separate sources. these are utility sources and there is no gen. involved. They intend to use voltage sensors with 3% mag. tolerance and 1 deg. phase angle error. There are no info on slip frequency data. What are...