SilverArc
Electrical
- Sep 20, 2006
- 82
Hi,
I was a little hesitant in asking this question because I guess this aspect of grounding has been discussed many times.
It is in relation to a mining application, where a 69/4.16 KV substation is feeding a indoor switchgear located in a Hoist-room, which has other electrical equipment also. This substation is 1.2 KM away from the switchgear.
As being an indoor switchgear of 4.16 KV, I guess I should not be much concerned about the GPR as it would never exceed 2400 V only and only if the ground from the substation is not brought to this switchgear.
If I connect this ground to my local grid, then I need to consider the potential my grid will be subjected to because of 69 KV ground fault. I will be considering 3 phase fault current for the calculation instead of single line to ground just to get a better result
What would you suggest, that do I have to or I should connect the two grids togather.
Thanks
I was a little hesitant in asking this question because I guess this aspect of grounding has been discussed many times.
It is in relation to a mining application, where a 69/4.16 KV substation is feeding a indoor switchgear located in a Hoist-room, which has other electrical equipment also. This substation is 1.2 KM away from the switchgear.
As being an indoor switchgear of 4.16 KV, I guess I should not be much concerned about the GPR as it would never exceed 2400 V only and only if the ground from the substation is not brought to this switchgear.
If I connect this ground to my local grid, then I need to consider the potential my grid will be subjected to because of 69 KV ground fault. I will be considering 3 phase fault current for the calculation instead of single line to ground just to get a better result
What would you suggest, that do I have to or I should connect the two grids togather.
Thanks