rockman7892
Electrical
- Apr 7, 2008
- 1,172
I'm looking into a temporary mobile substation to temporarily restore power to a site with 60kV utility incoming stepped down to 12.47kV for distribution to facility. Mobile sub would consist of 60kV breaker, 5MVA transformer and 12.47kV secondary breaker.
The only option for temporary location of mobile sub will be right outside of the existing substation fence sitting outside the substation. A few immediate questions come to mind here that I was looking to get some input on form experience.
1) Fencing - Does appropriately sized fencing need to be setup around the entire mobile substation to restrict access just like a normal permanent substation. Assuming yes. Can this be some sort of temporary construction fencing?
2) Does temporary oil containment need to be setup around transformer on mobile sub based on same criteria as a permanent installation? Is there a typical method for doing such?
3) What are the grounding requirements around the mobile sub? Does the same criteria in IEEE 80 apply in calculating step and touch and designing grounding accordingly? Or is the more standard approach to just provide a ground ring 3ft outside of sub with rods at each corner? Assuming this new grounding would get interconnected to ground grid in adjacent substation?
The only option for temporary location of mobile sub will be right outside of the existing substation fence sitting outside the substation. A few immediate questions come to mind here that I was looking to get some input on form experience.
1) Fencing - Does appropriately sized fencing need to be setup around the entire mobile substation to restrict access just like a normal permanent substation. Assuming yes. Can this be some sort of temporary construction fencing?
2) Does temporary oil containment need to be setup around transformer on mobile sub based on same criteria as a permanent installation? Is there a typical method for doing such?
3) What are the grounding requirements around the mobile sub? Does the same criteria in IEEE 80 apply in calculating step and touch and designing grounding accordingly? Or is the more standard approach to just provide a ground ring 3ft outside of sub with rods at each corner? Assuming this new grounding would get interconnected to ground grid in adjacent substation?