AC Substation Grounding (IEEE std. 80)

[elec_eng]

When does this be required? Does it apply to customer owned MV (13.2KV) substions? If not, how do you provide grounding for the MV substations?

 

[jim dungar]

Does it apply to customer owned MV (13.2KV) substions?

We use it for customer owned substations. Although for many customer owned yards containing metal enclosed underground fed equipment, the allowable ground spacing creates a ring much more often than it does a grid.

 

[elec_eng]

We use it for customer owned substations. Although for many customer owned yards containing metal enclosed underground fed equipment, the allowable ground spacing creates a ring much more often than it does a grid.

Jim,

Can you elaborate your answer little bit..How do you use IEEE std 80 to MV substation? How do you use your calculation? Do you use any software to do that? Does your ground ring provide any touch/step voltage protection like IEEE std. 80 does?

 

[jim dungar]

Does your ground ring provide any touch/step voltage protection like IEEE std. 80 does?

The intention of the grid is the reduction in step/touch potential.

The application of IEEE 80, and using hand or software calculations, really depends on what is being installed and over how large of an area and in what part of the country.