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ArresterWorks
Calculating the Value of a Distribution Arrester
Conductor
Height
9
10
11
12
13
14
15
16
17
meters
System Width
.5
1
1.5
2
1.5
3
meters
Ground flash density
.25
.5
1
2
3
4
5
6
7
8
9
10
12
14
16
18
20
22
24
26
30
35
flashes/km
2
/yr
Installed Transformer Cost
500
750
1000
1250
1500
2000
dollars
Length of Span
50
60
70
80
90
100
110
120
130
140
150
meters
Collection Area
1
2
3
4
5
6
7
8
9
10
11
12
spans
Evaluation Period
5
10
15
20
25
30
35
40
50
60
years
Flash Collection Rate
N
flashes/100km/yr
Strike Rate per span
flashes/span/year
Annual Strike Rate for
Collection Area
flashes/area/year
Years between strikes to collection area
years/arrester operation
number of saves over life of
arrester
Savings over the Evaluation Period
or
Value of the Arrester
Dollars
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