1. Whick guide recommend Cone Method for lightning protection ?as we know ieee 998 recmmend Rolling Sphere Method.
2. When calculating Zs, Does the parameter R0 namely the equivalent radius of the bundle refer to the metallic
radius of the bundle ? Is this right that R0=18.88mm/2=9.44mm...
could anyone help me on this problem?
the Minimum Clearance of the energized phases and a trolly in a substation?
In other words, the Minimum clearance of the road to the energized bus in a substation? Which standards or guide tell us about this issue?
As per IEEE 1427 ,we can find the phase...
what's the difference of wave impedence and surge impedence of the conductor?
when in lightning protection calculation,there will be surge impedence of the conductor involved. But could anyone tell me what's the difference between wave impedence and surge impedence of the conductor?
In a substation design, we choose shield wire for protection against lightning.
How to determine the clearance for the shield wire and the phase conductor in case of lightning couter attack?
Are there any IEC standards regarding to this issue?
P.S. if the distance is too short ,there may be an...
Could anyone help me for the solution about how to use Unistrut to support a vertical cable ladder along with a vertcal steel column?
Pictures for the installation would be much better.
Thanks in advance!
SFC is widely used in pumped storage power plant,but how to choose the busbar which is located in the output of SFC?
Any special characteristic of the busbar?how about its working status in low frequency electrical system?Are there any standards for the isolated phase enclosed busbar used in...
I notice that there are surge capacitors eqiupped in ABB GCB(generator circuit breaker) cabinet.Could anyone tell me how to choose surge capacitor? Such as how much value of the surge capacitor shoud be chosed based on the circumstances.
Thanks in advance!
For the basic information of surge...
Are there any IEC standards for relay protection configuration?I want to check whether it is right or not in my engineering design for the protection of generator and transformer?
Thanks a lot!
