1 Substation Lightning Protection

2 National Geographic Photo ~ Note leaders rising up from pole and tree

3 If your substation is taking lightning from lava flow, you have more problems than a flash-over!!!

4 Australia: A relatively rare positive lightning stroke that can carry 340KA peak current, last from tens to hundreds of milliseconds, travel 10 miles horizontally, reach 30,000° C, and be about 4 to 6’ diameter

5 WHAT CAN YOU DO?

6 Proposed “M”-shaped shielding in red for ultimate 6 transformer kV Eagle SS Plan View

7 Proposed shield poles in white and shield wire with sag in red 3D View The arc of radius of the rolling sphere 100’ strike distance shown in green Transformers and buses shown in blue under the protected envelope Substation facilities shown in orange

8 Simplified 3D View Proposed shield poles in white and shield wire with sag in red The arc of radius of the rolling sphere 100’ strike distance shown in green Transformers shown in blue under the protected envelope

9 Elevation View Proposed shield poles in white and shield wire with sag in red The arc of radius of the rolling sphere 100’ strike distance shown in green Transformers shown in blue under the protected envelope