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Table 2 Minimum flashover voltages (FOVmin) according to each contamination scenario for Cotopaxi-2015 and Tungurahua-2016 ashes in kV

From: Impact of volcanic ash from Cotopaxi-2015 and Tungurahua-2016 eruptions on the dielectric characteristics of suspension insulators, Ecuador

COTOPAXI-2015

Scenario

Porcelain Insulator

Glass Insulator

Test 1

Test 2

Test 3

Average

Std

Test 1

Test 2

Test 3

Average

Std

1

29.2

31.6

31.0

30.6

1.02

31.4

31.4

31.5

31.4

0.05

2

29.2

29.2

28.8

29.1

0.19

31.0

31.5

31.3

31.3

0.21

3

26.3

26.0

26.2

26.2

0.13

29.0

28.5

28.7

28.7

0.21

4

12.2

12.0

12.1

12.1

0.08

12.6

12.5

12.9

12.7

0.17

5

11.2

11.1

11.0

11.1

0.08

9.2

9.0

9.1

9.1

0.08

6

10.3

10.0

10.1

10.1

0.13

9.3

9.2

9.2

9.2

0.05

TUNGURAHUA-2016

Scenario

Porcelain Insulator

Glass Insulator

Test 1

Test 2

Test 3

Average

Std

Test 1

Test 2

Test 3

Average

Std

1

32.4

31.8

32.2

32.1

0.25

35.7

35.3

32.7

34.6

1.33

2

29.5

29.2

29.4

29.4

0.13

31.9

31.2

30.8

31.3

0.46

3

28.7

28.6

28.7

28.7

0.05

30.6

30.1

31.0

30.6

0.37

4

19.5

19.5

19.4

19.5

0.05

18.8

18.7

18.9

18.8

0.08

5

16.3

16.2

16.3

16.3

0.05

11.7

11.7

11.5

11.6

0.09

6

13.3

13.2

13.3

13.3

0.05

11.2

11.0

11.3

11.2

0.13

  1. Note that these values are lower than 36 kV, which is the specified tolerance value for the insulators under moist conditions. Std standard deviation
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Journal of Applied Volcanology

ISSN: 2191-5040

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