optimizer2008_2 calculo de pararrayos

8/4/2019 Optimizer2008_2 Calculo de Pararrayos

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Considerations

-10

0

10

20

30

40

50

60

-1 1 3 5 7 9 11 13 15

VoltageinkVandCurrentinkA

Time in uS

Arrester and Line Lead Simulator

VariSTAR Voltage

Impulse Current

Lead Voltage

VariSTAR + Lead Voltage

12 kV

Select

ArresterRating

Adjust

Time toCurrentCrest

Adjust

CurrentMagnitude34 kA2.0 uS

Adjust

Total LeadLength

1.25 ft


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Enter lightning stoke level in kA 30

This is the probability of any given

stroke being of at least this magnitude 53%

100% 5

98% 10

93% 15

83% 20

68% 2553% 30

39% 35

29% 40

21% 45

15% 50

11% 55

8% 60

7% 65

5% 70

4% 75

3% 80

3% 852% 90

2% 95

1% 100

1% 105

1% 110

1% 1151% 120

From IEEE Guide for Improving the Lightning Performance of Overhead

Distribution Lines ****IEEE 1410-1997 ****

io in kA

Probability

Io>i0

0

20

40

60

80

100

120

140

0 0.2 0.4 0.6 0.8 1 1.2

Peak Current Distribution of the First Stroke of a Lightning Flash

P ( Io>) = 1/1+(i0/31)exp2.6


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The purpose of this section is to help the user determine the optimum location ofarresters in long lines with few distribution transformers connected.

In these cases, the calculators below reslove some of the questions, but in thenext edition of the Optimizer, all the necessary modules will be availble.

Line Protection Calculators


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Start Page

Rev 2008.1 9-08 Ruzensky

UltraSIL Catalog Literature

Optimizer FAQ Line Protection Calculators

Lightning Simulationthrough an Arrester

Arrester RatingRecommendation

New Features of this Edition

Overhead Margin ofProtection Calculator

Losses Calculator

MOV AC Conduction

Lead Length Effect

The Optimizer 2008.1Maximize your System's Reliability with theOptimum

Arrester!

Power Systems

Interactive ArresterComparison

Page 4
http://www.cooperpower.com/products/components/surge/http://www.cooperpower.com/products/components/surge/


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New Features of 2003.8 released June 2003

1. Aged BIL can be selected 60-95%

2. The voltage drop across the lead length can be calculated based on faster risinglightning st

roke.

3. Optimizer FAQ page

4. System characteristics are change on the screen where they are used.

5. Metal Oxide Varistor conduction simulation. See how to measure resistive andcapacitiv

e currents and how they are affected by applied voltage.

6. Lightning simulation and the effects of lead length with examples of how toidenfity the lead length to count.

7. Calculate the probability of a lightning strike in your area of the country.

8. Use the stand alone margin of protection calculator.

10. Links to the Cooper website are embedded.11. Added Print Options

12. Added MOV AC conduction simulation

Jon Woodworth 6-9-03

Additions to 2003.8.6Added Station Arrester Rating SelectionAdded Station Arrester Energy CalculatorAdded Station Arrester data to Margin of Protection CalculatorAdded Probability of Line Flashover in a given area of the country and line geometryAdd4ed Simple tables for arrester selectionAdded Rule of thumb clause in the line lead example sectionAdded Terms and DefinitionsAdded link for check of update


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Question Where to go and how to do it

What arrester rating to

use on my system?

The best way to do this is to use the section that recommends the arrester voltage rating

based on system characteristics entered by the user. The key characteristics that need to

be entered are 1. Arrester class, 2. System voltage, 3. Regulation error, and 4. Maximum

temporary overvoltage time.

What is the easiest

way to comparearresters?

The best way to do this is to use the section called interactive comparison. Arresters from

Joslyn, OB and Cooper can be compared. For discharge voltage, two user enteredarresters can be added

What is the easiest

way to see what my

energy losses are due

to the material of the

housing?

In the interactive comparison section of the Optimizer, select the arresters to be

compared, then select the Click for savings in dollars button to see the savings. While

on that page, you can also change the arresters you are comparing and the region of the

world you are doing the investigation for. The cost of energy is also entered on this page.

This can also be done from the arrester selection page once the arresters have been

selected, you can click on the losses button and it will show the losses of all the suggested

arresters.

How does the

Optimizer select an

arrester?

It selects arresters based on entered data. There is a page that goes into minute detail

about the selection process. All manufacturers are selected the same way based on

MCOV, TOV, System voltages and arrester class

How much does the

line lead really effect

the voltage stressed

across thetransformer?

You will be surprised when you use the line lead effect calculator. This is located on the

interactive comparison page as well as a special page just for line lead calculations. On

the interactive comparison page, the effect of the line lead is added into the Margin Of

Protection graph.

Optimizer FAQ's


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What is the difference

between resistive

current and capacitive

current?

On the MOV AC conduction page, you can raise and lower the voltage applied to a MOV

disk. While doing this you can observe the changes in the current through the disk. The

resistive current is the current in phase with the voltage and the capacitive current is 90degrees out of phase with the voltage. Also check out the help buttons on that page.

How do I know the

length of line lead to

use in a line lead

calculation?

This is better explained graphically, so click on the Line Lead Identification button. A

general rule of thumb is to sum up the length of the lead that is in parallel with theprotected insulation and also in conduction during the surge.

Does the size of a line

lead affect the voltage

drop?

Just a bit. See the line lead calculator page for more detail. Adjust the size of the lead

wire and it will show the change in inductance. In general .4uH/foot will work in thesetypes of calculations.

What is TOV? TOV is the Temporary OverVoltage capability of an arrester

What is MCOV? MCOV is the maximum continuous operating voltage of an arrester

Question Not Here? Contact your Cooper Power Systems Sales Representative, and they will be able toanswer your questions, or put you in touch with someone who will.


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About the Optimizer

What is the Optimizer?This is a program that can assist users, specifiers, students, sellers, andalmost anyone involved in distribution arresters.

Functions of the Optimizer1. Recommends the optimum arrester rating from each manufacturer basedon user entered data.

2. Clearly and easily compares all critical characteristics of Cooper, Joslynand Ohio Brass distribution arresters.3. Runs simulation of the arrester4. Shows Lead length effects5. Helps predict the occurance of a strike to a line

Sources of DataAll the data in this calculator is public and found in catalogs except the WattsLoss data which comes from lab tests.

Calculation and Recommendation MethodsThe calculation methods are all from IEEE C62.22 and IEEE 1410-1997

If the screen is not sized correct, use the excel zoom option to fit to screen.

Jon Woodworth


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Rating Recommendation Logic

Arrester MCOV Selection Logic

Step 1

Calculate the maximum line to ground voltage on the

system. System voltage= 12.40 Max L-G =( L-L Voltage / 1.73 ) *( Regulation Error +1) Regulation Error = 10.5%

L to G voltage = 7.92

Step 2From the Rating/MCOV Table Find the MCOV rating of the

arrester that exceeds the line to ground voltage of the

systemMCOV of the arrester must be greater than the Max L-Gvoltage long term Rating 10

MCOV 8.4

Step 3

From the TOV curves of the arrester type, determine the

TOV capability of the arrester. This is also found in the

Raw TOV data in the Optimizer

Step 4

Based on the Fault Factor as determined from the systemtype, calculate the voltage level attained across the

arrester during a fault.Max L-G Voltage * Fault Factor = Expected temporary

Based on the Data Input

the Values are as shown

For a Cooper VariS

arrester based on the inputtthis value is


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Step 6

Determine the Arrester rating that has at least the TOV

rating as determined in step 5 and this is the arrester

rating that can be used for this system in question.

Example:For a 100 second fault, the TOV rating of a 10kV UltraSILarrester is 14.2kV but the voltage on the selected system can

reach 14.52kV which is beyond the capability of this rateing ofarrester. This means at least a 12kV arrester is needed for

this application.

Step 7

The final step is to determine the larger of the two MCOV

ratings as calculated in Step 2 and 6. The greater of these

two is the minimum MCOV rating for this application.


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kV

kV

kVkV

creen

below

AR

d data,

ArresterRating MCOV

kV kV3.0 2.556.0 5.109.0 7.6510.0 8.4012.0 10.215.0 12.718.0 15.321.0 17.0

24.0 19.527.0 22.030.0 24.433.0 27.536.0 29.0

ArresterRating MCOV

kV kV3.0 2.556.0 5.109.0 7.6510.0 8.4012.0 10.215.0 12.718.0 15.321.0 17.0

24.0 19.527.0 22.030.0 24.433.0 27.536.0 29.0


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Rating

10k

A

1/10

10k

A

8/20

500

10k

A

1/10

10k

A

8/20

500

A

10k

A

1/10

10k

A

8/20

500

A

10k

A

1/10

10k

A

8/20

500

A

10k

A

1/10

10k

A

8/20

500

A

10k

A

1/10

10k

A

8/20

500

A

10k

A

1/10

10k

A

8/20

500

A

5kA

1/10

10k

A

8/20

500

A

10k

A

1/10

10k

A

8/23 13 11 8.7 12 11 8.4 12 9.9 7.9 20 10 7.6 19 10 7.8 10 9.4 7.1 18 9.2 7 14 12 8.5 11 9.96 25 23 17 25 22 17 23 20 16 23 20 15 24 20 16 21 19 14 23 18 14 28 25 17 21 209 36 33 25 27 24 19 33 30 23 32 24 18 30 23 17 30 27 21 29 20 16 37 33 23 31 2910 37 34 26 28 26 19 34 32 24 32 25 19 32 23 18 31 28 21 31 21 16 41 36 24 34 3212 47 43 33 39 35 27 43 40 30 52 32 24 36 32 25 39 35 27 35 29 22 56 49 31 40 3815 59 54 41 43 39 29 54 48 37 55 39 29 42 35 27 49 44 34 41 32 24 65 58 40 51 4818 71 64 49 52 47 36 65 60 45 65 48 36 48 43 33 58 53 40 47 39 30 75 66 46 61 5621 75 68 52 55 50 38 69 63 48 65 51 38 54 46 35 62 56 43 53 42 32 83 73 51 68 6424 87 80 60 69 63 48 80 73 56 88 59 44 59 57 43 72 66 50 58 52 40 103 91 63 82 7627 99 90 68 78 71 54 91 85 63 97 68 51 65 65 49 81 74 56 64 59 45 112 99 71 92 8630 110 100 76 82 75 57 101 92 70 117 74 55 71 69 52 91 83 63 70 62 47 123 108 78 101 9433 123 112 85 91 83 63 113 105 78 120 84 63 77 76 57 100 91 69 76 69 52 0 0 0 0 036 132 120 91 96 88 67 121 111 84 130 89 66 82 80 61 108 98 74 81 73 55 150 132 92 121 113

UltraSILRiser Pole

VariGAP

OB NormalDuty

UltraSILNormal duty

VariSTAR

UltraSILNormal Duty

VariGAP

UltraSILHeavy Duty

VariSTAR

EvolutionURT

Arrester

Published Discharge Characteristics

OB HeDuty O

UltraSILHeavy Duty

VariGAP

UltraSILRiser Pole

VariSTAR
http://www.cooperpower.com/Library/pdf/23535.pdfhttp://www.cooperpower.com/Library/pdf/23535.pdfhttp://www.cooperpower.com/Library/pdf/23535.pdfhttp://www.hubbellpowersystems.com/powertest/catalog_sections/PDF_ohio/31_dynavar.pdfhttp://www.cooperpower.com/Library/pdf/23535.pdfhttp://www.cooperpower.com/Library/pdf/23535.pdfhttp://www.cooperpower.com/Library/pdf/23535.pdfhttp://www.cooperpower.com/Library/pdf/23537.pdfhttp://www.cooperpower.com/Library/pdf/23537.pdfhttp://www.cooperpower.com/Library/pdf/23537.pdfhttp://www.cooperpower.com/Library/pdf/23535.pdfhttp://www.cooperpower.com/Library/pdf/23535.pdfhttp://www.cooperpower.com/Library/pdf/23535.pdfhttp://www.cooperpower.com/Library/pdf/23539.pdfhttp://www.cooperpower.com/Library/pdf/23539.pdfhttp://www.hubbellpowersystems.com/powertest/catalog_sections/PDF_ohio/31_dynavar.pdfhttp://www.hubbellpowersystems.com/powertest/catalog_sections/PDF_ohio/31_dynavar.pdfhttp://www.cooperpower.com/Library/pdf/23537.pdfhttp://www.cooperpower.com/Library/pdf/23537.pdfhttp://www.cooperpower.com/Library/pdf/23537.pdfhttp://www.cooperpower.com/Library/pdf/23537.pdfhttp://www.cooperpower.com/Library/pdf/23537.pdfhttp://www.cooperpower.com/Library/pdf/23537.pdfhttp://www.cooperpower.com/Library/pdf/23537.pdfhttp://www.cooperpower.com/Library/pdf/23537.pdfhttp://www.cooperpower.com/Library/pdf/23537.pdfhttp://www.cooperpower.com/Library/pdf/23537.pdfhttp://www.cooperpower.com/Library/pdf/23537.pdfhttp://www.cooperpower.com/Library/pdf/23537.pdfhttp://www.hubbellpowersystems.com/powertest/catalog_sections/PDF_ohio/31_dynavar.pdfhttp://www.hubbellpowersystems.com/powertest/catalog_sections/PDF_ohio/31_dynavar.pdfhttp://www.cooperpower.com/Library/pdf/23539.pdfhttp://www.cooperpower.com/Library/pdf/23539.pdfhttp://www.cooperpower.com/Library/pdf/23539.pdfhttp://www.cooperpower.com/Library/pdf/23535.pdfhttp://www.cooperpower.com/Library/pdf/23535.pdfhttp://www.cooperpower.com/Library/pdf/23535.pdfhttp://www.cooperpower.com/Library/pdf/23537.pdfhttp://www.cooperpower.com/Library/pdf/23537.pdfhttp://www.cooperpower.com/Library/pdf/23537.pdfhttp://www.cooperpower.com/Library/pdf/23535.pdfhttp://www.cooperpower.com/Library/pdf/23535.pdfhttp://www.cooperpower.com/Library/pdf/23535.pdfhttp://www.hubbellpowersystems.com/powertest/catalog_sections/PDF_ohio/31_dynavar.pdfhttp://www.cooperpower.com/Library/pdf/23535.pdfhttp://www.cooperpower.com/Library/pdf/23535.pdfhttp://www.cooperpower.com/Library/pdf/23535.pdf


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500

A

10k

A

1/10

10k

A

8/20

500

A

10k

A

1/10

10k

A

8/20

500

A

10k

A

1/10

10k

A

8/20

500

A

10k

A

1/10

10k

A

8/20

500

A

Ratin

g

0 10 10 8 9 9 6.2 0 0 0 0 0 0 30 21 21 16 17 19 12 0 0 0 0 0 0 624 31 30 23 26 25 19 0 0 0 0 0 0 926 35 32 26 29 27 21 0 0 0 22 20 14 10

0 41 39 31 34 33 25 0 0 0 0 0 0 120 52 48 39 43 41 31 0 0 0 0 0 0 1547 62 58 47 51 49 37 0 0 0 0 0 0 180 72 62 54 60 56 44 0 0 0 0 0 0 210 83 78 62 68 66 50 0 0 0 0 0 0 240 93 87 70 77 73 56 0 0 0 0 0 0 270 103 97 78 86 82 62 0 0 0 0 0 0 300 0 - 0 0 - 0 0 0 0 0 0 0 330 124 116 93 103 97 75 114 96 75 0 0 0 36

Joslyn Riser

Pole

UserEntered

Arrester 1

UserEntered

Arrester 2

uty

Joslyn

Heavy Duty
http://www.joslynmfg.com/cgi-bin/product_sub.asp?catid=8&ext=no&subname=ZJPhttp://www.joslynmfg.com/characteristics.asphttp://www.joslynmfg.com/characteristics.asphttp://www.joslynmfg.com/characteristics.asphttp://www.joslynmfg.com/characteristics.asphttp://www.joslynmfg.com/cgi-bin/product_sub.asp?catid=8&ext=no&subname=ZJPhttp://www.joslynmfg.com/cgi-bin/product_sub.asp?catid=8&ext=no&subname=ZJP


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TOV Data All TOV calculations in the Optimizer are based on this database. To change the

UltraSIL

Normal duty

VariSTAR

UltraSIL

Normal

Duty

VariGAP

UltraSIL

Heavy Duty

VariSTAR

UltraSIL

Heavy-

Normal

Duty

Arrester

Evolution

URT

Arrester

UltraSIL

Riser Pole

VariSTAR

UltraSIL

Riser Pole

VariGAP

OB

Normal

Duty

0.01 1.78 2 1.78 2 1.78 1.69 2 1.620.1 1.68 2 1.68 2 1.78 1.6 2 1.62

1 1.59 2 1.59 2 1.78 1.51 2 1.5810 1.5 2 1.5 2 1.78 1.43 2 1.5

100 1.42 2 1.42 2 1.78 1.35 2 1.421000 1.34 2 1.34 2 1.78 1.27 2 1.33

10000 1.34 1.72 1.34 1.72 1.78 1.27 1.72 1.21000000 1.26 1.5 1.26 1.5 1.78 1.2 1.5 1.2


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ata, just change the data in the cell

OB Heavy

Duty

Optima 9-

10kV

OB Riser

Pole

Joslyn

Normal

Duty

Joslyn

Heavy

Duty

Joslyn

Riser Pole

1.705 1.46 1.7 1.72 1.461.622 1.46 1.7 1.72 1.46

1.533 1.46 1.61 1.63 1.41.5 1.39 1.52 1.54 1.31

1.45 1.33 1.47 1.47 1.261.45 1.29 1.42 1.43 1.221.45 1.16 1.3 1.3 1.181.45 1.2 1.2 1.2 1.2


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Calculator

Evolution URTArrester


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UNS UNG UHS URT UHG URS URG3 733.33% 755.86% 859.60% 831.37% 831.37% 910.64% 932.61%6 318.50% 326.01% 379.80% 367.98% 365.69% 408.02% 416.30%9 189.63% 289.34% 218.79% 299.16% 322.22% 251.85% 365.69%10 178.59% 272.55% 200.63% 274.02% 307.73% 238.08% 348.11%

12 121.45% 168.36% 139.29% 198.74% 194.12% 168.36% 223.13%15 77.24% 145.48% 97.92% 146.75% 168.36% 115.42% 195.03%18 47.74% 101.70% 59.40% 98.74% 120.42% 79.58% 142.35%21 39.30% 90.00% 50.32% 87.75% 107.42% 69.04% 128.37%

24 19.35% 52.00% 29.96% 62.12% 66.08% 45.04% 82.69%27 5.44% 34.37% 11.90% 39.71% 46.83% 28.73% 61.56%

30 -5.00% 26.67% 2.81% 28.38% 38.48% 15.15% 52.24%

33 -15.18% 15.15% -9.52% 13.10% 25.83% 4.51% 38.48%

36 -20.83% 8.20% -14.41% 6.74% 18.60% -2.66% 30.49%

Normal Duty Heavy Duty & URT

Calculator

15 53.6 38.7 48 38.5 35.4 44.1 32.218 64.3 47.1 59.6 47.8 43.1 52.9 39.221 68.2 50 63.2 50.6 45.8 56.2 41.6


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21 68.2 50 63.2 50.6 45.8 56.2 41.624 79.6 62.5 73.1 58.6 57.2 65.5 52

27 90.1 70.7 84.9 68 64.7 73.8 58.830 100 75 92.4 74 68.6 82.5 62.433 112 82.5 105 84 75.5 90.9 68.636 120 87.8 111 89 80.1 97.6 72.8

Input Option

Normal DutyHeavy Duty

1 UltraSIL ND VariSTAR Riser Pole

2 UltraSIL ND VariGAP3 Evolution URT Arrester

4 UltraSIL HD VariSTAR5 UltraSIL HD VariGAP

6 UltraSIL RP VariSTAR

7 UltraSIL RP VariGAP8 OB PDV-65 ND9 OB Optima

10 OB PVR RP

11 Joslyn ZNP ND

12 Joslyn ZHP HD 1 Four Wire M13 Joslyn ZRP 2 Spacer Cabl

3 Three Wire

4 Three Wire5 Delta

This is the source data

for comparative dropdown list

This is the

voltag

System Fa

Calculator

21 38.52% 88.56% 49.41% 86.34% 105.71% 67.90% 126.29%24 18.78% 51.08% 29.28% 61.07% 64.98% 44.20% 81.36%27 4.99% 33.65% 11.40% 38.93% 45.97% 28.06% 60.52%


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27 4.99% 33.65% 11.40% 38.93% 45.97% 28.06% 60.52%30 -5.36% 26.02% 2.39% 27.72% 37.72% 14.62% 51.32%

33 -15.47% 14.62% -9.85% 12.58% 25.19% 4.07% 37.72%36 -21.08% 7.73% -14.71% 6.29% 18.04% -3.04% 29.81%

18 kV 18 kV 18 kV 18 kV 18 kVUltraSIL RP VariS OB Optima ion URT ArresterUltraSIL RP Vari OB Optima

78.30% 67.31% 97.17% 52.9 56.4

ARR 1 Normal Duty Heavy Duty & URT

Joslyn ZNP OB PDV-65 UltraSIL ND VUltraSIL N Joslyn ZHPOB OptimaUltraSIL HDMOP FALSE FALSE FALSE FALSE FALSE FALSE FALSE

DV FALSE FALSE FALSE FALSE FALSE FALSE FALSE


Joslyn ZNP OB PDV-65 UltraSIL ND VUltraSIL N Joslyn ZHPOB OptimaUltraSIL HD

MOP FALSE FALSE FALSE FALSE FALSE 67.31% FALSEDV FALSE FALSE FALSE FALSE FALSE 56.4 FALSE



MOP FALSE FALSE FALSE FALSE FALSE FALSE FALSEDV FALSE FALSE FALSE FALSE FALSE FALSE FALSE

Calculator

36 120 87.8 111 89 80.1 97.6 72.8


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Data for inpu

0.010.1

0.38 kV 1

10

1001000

10000Infinite

Output of ab3

0 Normal duty Normal Duty Heavy Duty V y- Normal ion URT Ar iser Pole Riser Pole

0.01 1.78 2 1.78 2 1.78 1.69 2

0.1 1.68 2 1.68 2 1.78 1.6 21 1.59 2 1.59 2 1.78 1.51 2

10 1.5 2 1.5 2 1.78 1.43 2

100 1.42 2 1.42 2 1.78 1.35 2

1000 1.34 2 1.34 2 1.78 1.27 2

10000 1.34 1.72 1.34 1.72 1.78 1.27 1.72

1000000 1.26 1.5 1.26 1.5 1.78 1.2 1.5


TOV Data

This is the kv to add to the discharge

voltage from the lead length

TOV Data

Calculator

10 kV 12 kV 12 kV 10 kV 10 kV 12 kV 12 kV



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y y p13.524 16.116 16.218 16.800 13.692 15.637 16.218

Calculator

EvolutionURTArrester


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OB PDV-65 OB PDV-100 OB PVR Joslyn ZNP Joslyn ZHP Joslyn ZJP672.36% 859.60% 943.96% #VALUE! 831.37% 932.61%287.76% 379.80% 419.13% #VALUE! 358.94% 413.51%187.88% 227.59% 287.76% 211.48% 220.95% 283.06%163.89% 200.63% 251.85% 180.24% 195.95% 247.99%

93.88% 152.66% 192.31% #VALUE! 146.75% 187.01%65.22% 98.74% 134.57% #VALUE! 98.33% 131.71%43.94% 68.44% 94.27% 55.74% 63.79% 92.70%30.14% 49.61% 70.86% #VALUE! 52.98% 69.34%

4.97% 24.67% 46.38% #VALUE! 22.27% 45.04%-4.04% 11.11% 31.94% #VALUE! 8.82% 30.67%

-12.04% 1.06% 17.28% #VALUE! -1.96% 16.14%

#VALUE! #VALUE! #VALUE! #VALUE! #VALUE! #VALUE!

-28.03% -15.85% -1.04% #VALUE! -18.17% -2.06%

Riser Pole

Calculator

57.5 47.8 40.5 47.9 4166 56.4 48.9 61 58 49.373 63.5 55.6 62.1 56.1


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90.5 76.2 64.9 77.7 65.5

99 85.5 72 87.3 72.7108 94 81 96.9 81.8- -

132 112.9 96 116.1 97

for Arrester Type Rating MCOV

2 3 2.556 5.19 7.65

10 8.4 112 10.2 2

0.0 15 12.7 318 15.3 4

21 17 5

24 19.5 627 22 730 24.4 8

33 27.5 9

Fault Factor 36 29 10

lti-Grounded 11.35

ow Impedance Grounded 1.4

igh Impedance Grounded 1.731.73

v to add to the discharge

from the lead length

lt Factor Selection Table (From input

page)

Calculator

29.46% 48.71% 69.70% #VALUE! 52.04% 68.20%4.53% 24.05% 45.52% #VALUE! 21.67% 44.20%-4.41% 10.62% 31.25% #VALUE! 8.35% 29.99%


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-12.35% 0.65% 16.73% #VALUE! -2.35% 15.60%

#VALUE! #VALUE! #VALUE! #VALUE! #VALUE! #VALUE!-28.24% -16.14% -1.43% #VALUE! -18.44% -2.45%

18 kVution URT Arrester

47.8

Riser Pole

Evolution URTArrester UltraSIL HD oslyn ZJP R OB PVR RPUltraSIL RP UltraSIL RP VariGAP

FALSE FALSE FALSE FALSE 78.30% FALSEFALSE FALSE FALSE FALSE 52.9 FALSE

Riser Pole


FALSE FALSE FALSE FALSE FALSE FALSEFALSE FALSE FALSE FALSE FALSE FALSE

Riser PoleEvolution URTArrester UltraSIL HD oslyn ZJP R OB PVR RPUltraSIL RP UltraSIL RP VariGAP

97.17% FALSE FALSE FALSE FALSE FALSE47.8 FALSE FALSE FALSE FALSE FALSE

Calculator

132 112.9 96 116.1 97


187/278

t screen

ve Inquire1

B Normal Dut y Duty OptimOB Riser Polelyn Normal lyn Heavy Dslyn Riser Pole

1.62 1.705 1.46 1.7 1.72 1.46

1.62 1.622 1.46 1.7 1.72 1.461.58 1.533 1.46 1.61 1.63 1.4

1.5 1.5 1.39 1.52 1.54 1.31

1.42 1.45 1.33 1.47 1.47 1.26

1.33 1.45 1.29 1.42 1.43 1.22

1.2 1.45 1.16 1.3 1.3 1.18

1.2 1.45 1.2 1.2 1.2 1.2

Riser Pole

Calculator

10 kV 10 kV 10 kV 12 kV 12 kV 10 kV



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16.800 14.952 11.760 14.892 15.402 16.800

Calculator

UNS UNG UHS URT UHG URS URG OB PDV 6


189/278

UNS UNG UHS URT UHG URS URG OB PDV-63 566.67% 584.68% 667.68% 645.10% 645.10% 708.51% 726.09% 517.89%6 234.80% 240.81% 283.84% 274.38% 272.55% 306.42% 313.04% 210.20%9 131.71% 211.48% 155.03% 219.33% 237.78% 181.48% 272.55% 130.30%10 122.87% 198.04% 140.51% 199.21% 226.18% 170.46% 258.49% 111.11%

12 77.16% 114.69% 91.44% 138.99% 135.29% 114.69% 158.50% 55.10%15 41.79% 96.38% 58.33% 97.40% 114.69% 72.34% 136.02% 32.17%18 18.20% 61.36% 27.52% 59.00% 76.33% 43.67% 93.88% 15.15%21 11.44% 52.00% 20.25% 50.20% 65.94% 35.23% 82.69% 4.11%

24 -4.52% 21.60% 3.97% 29.69% 32.87% 16.03% 46.15% -16.02%27 -15.65% 7.50% -10.48% 11.76% 17.47% 2.98% 29.25% -23.23%

30 -24.00% 1.33% -17.75% 2.70% 10.79% -7.88% 21.79% -29.63%

33 -32.14% -7.88% -27.62% -9.52% 0.66% -16.39% 10.79% #VALUE!

36 -36.67% -13.44% -31.53% -14.61% -5.12% -22.13% 4.40% -42.42%


Calculator

15 53.6 38.7 48 38.5 35.4 44.1 32.2 57.518 64.3 47.1 59.6 47.8 43.1 52.9 39.2 6621 68.2 50 63.2 50.6 45.8 56.2 41.6 7324 79 6 62 5 73 1 58 6 57 2 65 5 52 90 5


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24 79.6 62.5 73.1 58.6 57.2 65.5 52 90.5

27 90.1 70.7 84.9 68 64.7 73.8 58.8 9930 100 75 92.4 74 68.6 82.5 62.4 10833 112 82.5 105 84 75.5 90.9 68.636 120 87.8 111 89 80.1 97.6 72.8 132

This table is only used for loss calculati

Lead

Length1 0.17 Feet

Location % wet 1

Florida 0.17 2 0.003Coastal 0.16 3 Joslyn ZRP 0.14

South East 0.13 4 Joslyn ZNP ND 0.03North East 0.1 5 UltraSIL ND VariGAP 0.05

Midwest US 0.05 6 OB PDV-65 ND 0.01

Coastal Nort 0.23 7 OB PVR RP 0.02Tropic 0.26 8 OB Optima 0.02Sub Tropic 0.22 9 UltraSIL HD VariGAP 0.06

Southeast A 0.26 10 UltraSIL HD VariSTAR 0.03

15 Joslyn ZHP HD 0.05

20 UltraSIL ND VariSTAR 0.0230 UltraSIL RP VariGAP 0.0640 UltraSIL RP VariSTAR 0.03

50Results of selection -- 1

Evolution URT Arrester

Used for watts loss

calculations

Internal

WattsLoss(w/kv)

1

Calculator

21 10.82% 50.85% 19.53% 49.07% 64.57% 34.32% 81.03% 3.57%24 -4.98% 20.86% 3.43% 28.85% 31.99% 15.36% 45.09% -16.38%27 -16.01% 6.92% -10.88% 11.14% 16.78% 2.45% 28.42% -23.53%30 24 29% 0 82% 18 09% 2 18% 10 17% 8 30% 21 05% 29 88%


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30 -24.29% 0.82% -18.09% 2.18% 10.17% -8.30% 21.05% -29.88%

33 -32.37% -8.30% -27.88% -9.93% 0.16% -16.74% 10.17% #VALUE!36 -36.87% -13.81% -31.77% -14.97% -5.57% -22.43% 3.85% -42.59%

18 kV 18 kV 18 kV 18 kV 18 kV 18 kVUltraSIL RP Vari OB Optima ion URT ArresterUltraSIL RP Vari OB Optima ion URT Ar

42.64% 33.85% 57.74% 52.9 FALSE FALSE


Joslyn ZNP OB PDV-6 UltraSIL N UltraSIL N Joslyn ZH OB PDV-1 UltraSIL HD Va

Evolution

URTArrester

MOP FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSEDV FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE



Evolution

URTArrester

MOP FALSE FALSE FALSE FALSE FALSE 33.85% FALSE FALSEDV FALSE FALSE FALSE FALSE FALSE 56.4 FALSE FALSE



EvolutionURTArrester

MOP FALSE FALSE FALSE FALSE FALSE FALSE FALSE 57.74%

DV FALSE FALSE FALSE FALSE FALSE FALSE FALSE 47 8

Calculator

36 120 87.8 111 89 80.1 97.6 72.8 132


192/278

Calculator


193/278

Calculator

Optima OB PVR Joslyn ZNPJoslyn ZHPJoslyn ZJP


194/278

Optima OB PVR Joslyn ZNPJoslyn ZHPJoslyn ZJP667.68% 735.16% #VALUE! 645.10% 726.09%283.84% 315.30% #VALUE! 267.15% 310.81%162.07% 210.20% 149.18% 156.76% 206.45%140.51% 181.48% 124.19% 136.76% 178.39%

102.13% 133.85% #VALUE! 97.40% 129.61%59.00% 87.65% #VALUE! 58.66% 85.37%34.75% 55.42% 24.59% 31.03% 54.16%19.69% 36.69% #VALUE! 22.38% 35.47%-0.26% 17.10% #VALUE! -2.19% 16.03%-11.11% 5.56% #VALUE! -12.94% 4.54%

-19.15% -6.17% #VALUE! -21.57% -7.09%

#VALUE! #VALUE! #VALUE! #VALUE! #VALUE!

-32.68% -20.83% #VALUE! -34.54% -21.65%

Riser Pole

Arrester

Model

Calculator

47.8 40.5 47.9 41 6 30056.4 48.9 61 58 49.3 Selected Row-------> 263.5 55.6 62.1 56.1 Selected Cost-------> 9576 2 64 9 77 7 65 5


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76.2 64.9 77.7 65.585.5 72 87.3 72.7

94 81 96.9 81.8- -

112.9 96 116.1 97

ons

1 802 503 70

0.2 4 752.25 5 85

1.75 6 900.2 7 95

1.75 Selected line and value-------> 1 0.8

2.5 Aged BIL----------------------------> 762.50.2

0.2

2.5

0.20.20.2

Aged BIL Selection as a

% of original

External Watts

(w/kv) when wet

Calculator

18.97% 35.76% #VALUE! 21.64% 34.56%-0.76% 16.42% #VALUE! -2.67% 15.36%-11.51% 5.00% #VALUE! -13.32% 3.99%19 48% 6 61% #VALUE! 21 88% 7 52%


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-19.48% -6.61% #VALUE! -21.88% -7.52%#VALUE! #VALUE! #VALUE! #VALUE! #VALUE!-32.91% -21.15% #VALUE! -34.75% -21.96%

rester

Riser Pole

UltraSIL HD Var slyn ZJP ROB PVR R UltraSIL R UltraSIL RP VariGAPFALSE FALSE FALSE 42.64% FALSEFALSE FALSE FALSE 52.9 FALSE

Riser Pole

UltraSIL HD Var slyn ZJP ROB PVR R UltraSIL R UltraSIL RP VariGAP

FALSE FALSE FALSE FALSE FALSEFALSE FALSE FALSE FALSE FALSE

Riser Pole

UltraSIL HD Var slyn ZJP ROB PVR R UltraSIL R UltraSIL RP VariGAPFALSE FALSE FALSE FALSE FALSE

FALSE FALSE FALSE FALSE FALSE

Calculator

112.9 96 116.1 97


197/278

Calculator


198/278

Calculator


199/278

Arrester Selection Logic and CalculationsStep 4

Maximum lineto ground

voltage theunfalultedphase will

reach during asingle line to

ground faulton tnother

phase

Step 7

Select thearrester rating

that meetsboth the worst

case TOVand the longterm line to

groundvoltage

Step 5

Calculate TheMinimum MCOV

rating of anarrester of this type

that couldwithstand a fault

for the given

clearing time.(kV)

Step 6

Select theArrester

MCOV ratingof this type

arrester thatcan withstand

the stated

TOV time andamplitude

Sep 3

TOVCapabilities

@ theSelected time

above (puMCOV)

Step 1:

Maximum Lineto ground

voltage of thesystem basedon regulation

error

(kV)

Step 2:

IgnoringTOV, Selectthe Minimum

ArresterRating that

has an

MCOVabove the

line toground

Calculator

9 7.6510 8.412 10.215 12 7


200/278

15 12.718 15.3

21 1724 19.527 2230 24.4

33 27.5

36 29

Calculator


201/278

Calculator


202/278

Calculator


203/278

Calculator


204/278

Calculator

6 4.5 6 6.607 5 7 6.908 5.5 8 8.329 6 9 10.00


205/278

10 6.5 10 11.00

11 7 11 12.0012 7.5 12 12.4013 8 13 13.2014 8.5 14 13.80

15 9 15 15.00

16 9.5 16 20.00

17 10 17 20.8018 10.5 18 22.0019 11 19 22.90

20 11.5 20 23.0021 12 21 24.90

22 12.5 22 27.60 Selected R23 13 23 33.00 Selected E

24 13.5 24 34.50

25 14 25 44.0026 14.5 Selected Row-------> 1227 15 Selected Voltage------- 12.4

28 15.5

29 16

Selected Row-------> 9Selected Cost-------> 6

Calculator


206/278

Calculator


207/278

Calculator


208/278

Calculator


209/278

Calculator

6 4.57 5.08 5.59 6.0


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10 6.5

11 7.012 7.513 8.014 8.5

15 9.0

16 9.5

17 10.018 10.519 11.0

20 11.521 12.0

ow-------> 18ror-------> 10.5

Interactive Comparison

Interactive Arrester Comparison


211/278

Arrester #1 Arrester #2 Arrester #3Type of Arrester Type of Arrester Type of ArresterkV Rating kV Rating kV Rating

Suggest

40.0

45.0

50.0

55.0

60.0

#1 #2 #3

Discharge Voltage(kV) of arrester only

0%

20%40%

60%

80%

100%

120%

#1 #2 #3

New Margin OfProtection (%)

0%

20%

40%

60%

80%

#1 #2 #3

Aged Margin OfProtection (%)

0.0

10.0

20.0

30.0

40.0

#1 #2 #3

TOV(kV RMS)

Annual Losses(watts)

Internal on Top

0

5

10

#1 #2 #3

Modify AgedBIL as a % oforiginal

System BIL

Min of 20% Recommended

Optima TOVonly for 9kVor 10kV

Page 211

Recommendations

`

Recommended Arresters kV Rating Help Preferred Arrester Class

Recommended Arresters Based on System Conditions

Select Arrester & System Characteristics


212/278

g

Joslyn ZHP HD 10 Help System VoltageOB PDV-100 Optima 12 Help System Type

UltraSIL HD VariSTAR 12 Help 1.73 Gnd Fault Factor

UltraSIL HD VariGAP 10 Help Regulation Error in %

Evolution URT Arrester 10 Help Max Fault Clearing Time (sec)

Arrester

Model

Step 1:

Maximum Line toground voltage of

the system based

on regulation

error

(kV)

Step 2:

Ignoring TOV,

Select theMinimum

Arrester Ratingthat has an

MCOV abovethe line to

ground voltagein step 1

(kV)

Sep 3

TOV

Capabilities@ the

Selected

time above

(pu MCOV)

Step 4

Maximum line

to groundvoltage the

unfalulted

phase will

reach during a

single line to

ground fault on

tnother phase

Step 5

Calculate The

Minimum MCOVrating of an

arrester of this type

that could

withstand a fault for

the given clearing

time.

(kV)

Step 6

Select the

Arrester MCOVrating of this type

arrester that can

withstand the

stated TOV time

and amplitude

Step 7

Select the

arrester ratingthat meets both

the worst case

TOV and the

long term line to

ground voltage

Help Help Help Help Help Help Help

Joslyn 7.91 10 1.63 13.69 8.40 10 10OB 7.91 10 1.53 13.69 8.93 12 12

VariStar 7.91 10 1.59 13.69 8.61 12 12Evolution 7.91 10 1.78 13.69 7.69 10 10

Arrester Selection Logic and Calculations

WATTS LOSSES DUE TO INTERNAL AND EXTERNAL LEAKAGE CURRENTS


213/278

Arrester Type Joslyn ZHP HD OB PDV-100 OptimaUltraSIL HD

VariSTAR

UltraSIL HD

VariGAP

Evolution URT

Arrester

Arrester Rating (kV) 10 12 12 10 10

Housing Losses during wet weather (watts) 25.0 #N/A 2.4 2.0 2.0

Cost of Energy in Cents/kWh 6.0 6.0 6.0 6.0 6.0

Annual % of Wet Conditions 17% 17% 17% 17% 17%

Cost of Annual HousingLosses 2.23$ #N/A 0.21$ 0.18$ 0.18$

Watts Losses per kV of Arrester Rating 0.003 0.050 0.050 0.050 0.003

Continuous Internal Watts Losses (in watts) 0.03 0.60 0.60 0.50 0.03Arrester 0.00$ 0.05$ 0.05$ 0.04$ 0.00$

Total Annual Watts Loss Cost per Arrester 2.24$ #N/A 0.27$ 0.22$ 0.18$Enter Number of Arresters Used Annually

Total Annual Loss on System 4,473$ #N/A 534$ 445$ 362.66$

Internal Gap and/or Disk Losses

External (Housing) Losses When Wet

2000

Basis of Calculations (housing losses only)Losses are simply calculated based on the time the product is wet, the losses when wet and the cost of energy. EPDM material changesits hydrophobicity with time as shown many times in lab tests, which leads to the higher losses of energy than silicone rubber that does not

Savings with arresters from using Silicone Rubber


214/278

Region of the world

% of annual

time in wetconditions

Annual losses

of the selected

EPDM housedarrester

( $ )

Annual losses

of the selected

Silicone rubberhoused arrester

( $ )

Losses over

20 years of

the selected

EPDM housedarrester

( $ )

Losses over

20 years of

the selected

Silicone

rubberhoused

arrester

( $ )

20 Year

Savings

from using

Siliconehoused

arrester

( $ )

Present Value

of this Savings

at the specified

cost of money

(%)

Florida 17% 4.02 0.32 80.42 6.43 73.98 50.27Coastal 16% 3.78 0.30 75.69 6.05 69.63 47.32South East US 13% 3.07 0.25 61.50 4.92 56.58 38.44North East US 10% 2.37 0.19 47.30 3.78 43.52 29.57Midwest US 5% 1.18 0.09 23.65 1.89 21.76 14.79Coastal Northwest 23% 5.44 0.44 108.80 8.70 100.10 68.02Tropic 26% 6.15 0.49 122.99 9.84 113.15 76.89

Sub Tropic 22% 5.20 0.42 104.07 8.33 95.74 65.06Southeast Asia 26% 6.15 0.49 122.99 9.84 113.15 76.89

Data Source Data Source

y p y y g gylose its hydrophobicity. This summary sheet contrasts the cost to operate an arrester housed in EPDM vs. one housed in silicone rubber.

Losses = time wet * cost of energy * losses when wet($$$$) = hours * $$/kWh * kW Cost/kWh in cents

Adjust energy cost here

SelectArresterRating

Arrester Type UltraSIL RP VariSTAR OB Optima

Arrester

Arrester Rating (kV) 18 18 18

External (Housing) Losses When Wet

WATTS LOSSES DUE TO INTERNAL AND EXTERNAL LEAKAGECURRENTS


215/278

Data Source Housing Losses during wet weather (watts) 3.60 45.00 3.60Cost of Energy in Cents/kWh 6.0 6.0 6.0

Data Source Annual % of Wet Conditions 17% 17% 17%

Cost of Annual Housing Losses 0.32$ 4.02$ 0.32$

Internal Watts Losses per kV of Arrester Rating 0.030 0.020 0.003Continuous Internal Watts Losses (in watts) 0.54 0.36 0.054

Annual Cost of Internal Watts Loss per Arrester 0.05$ 0.03$ 0.00$

Annual Watts Loss Cost per Arrester 0.37$ 4.05$ 0.33$Enter Number of Arresters Used Annually

Total Annual Loss on System 368.97$ 4,052.38$ 326.40$

Internal Gap and/or Disk Losses (Continuous)

1000


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217/278


218/278

Annual Watts Loss


219/278

0

1

2

3

4

5

6

7

8

9

Wa

tts

Loss

Arrester

Lower Watts Lost Is Better


220/278

Manual DV Comparison

10 kA, 8/20 DISCHARGE VOLTAGES OF SELECTED ARRESTERS


221/278

42.0

44.0

46.0

48.0

50.0

52.0

54.0

56.0

58.0

Disc

harge

Vo

lta

ge

(kV)

18 kV UltraSIL RP

18 kV OB Optima

18 kV Evolution U

Lower Values are Better

Manual DV Comparison


222/278

VariSTAR

RT Arrester

Recommended ND DV

10 kA, 8/20 DISCHARGE VOLTAGE OF RECOMENDEDNORMAL DUTY ARRESTERS


223/278

0.0

10.0

20.0

30.0

40.0

50.0

60.0

Disc

harge

Vo

ltage

(kV)

NORMAL DUTY ARRESTERS

10 kV Joslyn ZNP ND12 kV OB PDV-65 ND

12 kV UltraSIL ND VariS

10 kV UltraSIL ND Vari

Recommended ND DV


224/278

TAR

AP

Recommended HD DV

10 kA, 8/20 DISCHARGE VOLTAGE OF RECOMMENDED


225/278

0.0

5.0

10.0

15.0

20.0

25.0

30.0

35.0

40.0

45.0

Disc

harge

Vo

ltage

(kV)

HEAVY DUTY ARRESTERS

10 kV Joslyn ZHP HD12 kV OB Optima

12 kV UltraSIL HD VariSTA

10 kV UltraSIL EX

10 kV UltraSIL HD VariGA

Recommended HD DV


226/278

R

P

Recommended RP DV

10 kA, 8/20 DISCHARGE VOLTAGE OF RECOMMENDEDRISER POLE ARRESTERS


227/278

0.0

5.0

10.0

15.0

20.0

25.0

30.0

35.0

40.0

Disc

harge

Voltage

(kV)

RISER POLE ARRESTERS

10 kV Joslyn ZJP RP

12 kV OB PVR RP

12 kV UltraSIL RP VariSTAR

10 kV UltraSIL RP VariGAP

Manual MOP

MARGIN OF PROTECTION BASED UPON NEW EQUIPMENT BIL,


228/278

0.00%

20.00%

40.00%

60.00%

80.00%

100.00%

120.00%

%Marg

ino

fProtec

tion

LEAD LENGTHS AND SELECTED ARRESTER

18 kV UltraSIL RP Vari

18 kV OB Optima

18 kV Evolution URT A

Higher Margin of Protection is Better

System BIL

20% is the minimum recommended Margin of Protection

Manual MOP


229/278

STAR

rrester

Manual MOP Aged

MARGIN OF PROTECTION BASED ON AGED EQUIPMENT BIL,


230/278

0%

10%

20%

30%

40%

50%

60%

70%

%Marg

ino

fPro

te

ction

LEAD LENGTHS AND SELECTED ARRESTER

18 kV UltraSIL RP VariSTA

18 kV OB Optima

18 kV Evolution URT Arrest



Higher Margin of Protection is Better

Manual MOP Aged


231/278

R

er

Recommended ND MOP

MARGIN OF PROTECTION FOR NEW EQUIPMENTUSING RECOMMENDED NORMAL DUTY ARRESTERS


232/278

0.00%

50.00%

100.00%

150.00%

200.00%

250.00%

300.00%

%Marg

ino

fPro

tec

tion

10 kV Joslyn ZNP ND

12 kV OB PDV-65 ND


10 kV UltraSIL ND VariG


System BIL

Recommended ND MOP


233/278

TAR

AP

Recommended MOP Aged

MARGIN OF PROTECTION FOR AGED EQUIPMENTUSING RECOMMENDED NORMAL DUTY ARRESTERS


234/278

0.00%

50.00%

100.00%

150.00%

200.00%

250.00%

%Marg

ino

fPro

te

ction

10 kV Joslyn ZNP ND12 kV OB PDV-65 ND


10 kV UltraSIL ND VariG


System BIL

Recommended MOP Aged


235/278

TAR

AP

Recommended HD MOP

MARGIN OF PROTECTION FOR NEW EQUIPMENTUSING RECOMMENDED HEAVY DUTY ARRESTERS


236/278

0.00%

50.00%

100.00%

150.00%

200.00%

250.00%

300.00%

350.00%

%Marg

ino

fPro

tec

tion

10 kV Joslyn ZHP HD

12 kV OB Optima

12 kV UltraSIL HD VariSTA

10 kV Evolution URT Arrest

10 kV UltraSIL HD VariGAP

Recommended HD MOP


237/278

R

er

Recommended HD MOP Aged

MARGIN OF PROTECTION FOR AGED EQUIPMENTUSING RECOMMENDED HEAVY DUTY ARRESTERS


238/278

0.00%

50.00%

100.00%

150.00%

200.00%

250.00%

%Marg

ino

fPro

tec

tion

10 kV Joslyn ZHP HD

12 kV OB Optima

12 kV UltraSIL HD VariST

10 kV Evolution URT Arres


Recommended HD MOP Aged


239/278

R

ter

P

Recommended RP MOP

400 00%

MARGIN OF PROTECTION FOR NEW EQUIPMENTUSING RECOMMENDED RISER POLE ARRESTERS


240/278

0.00%

50.00%

100.00%

150.00%

200.00%

250.00%

300.00%

350.00%

400.00%

%MarginofP

rotection

10 kV Joslyn ZJP RP

12 kV OB PVR RP




Recommended RP MOP Aged

300 00%

MARGIN OF PROTECTION FOR AGED EQUIPMENTUSING RECOMMENDED RISER POLE ARRESTERS


241/278

0.00%

50.00%

100.00%

150.00%

200.00%

250.00%

300.00%

%

Marg

inofP

rotec

tion

10 kV Joslyn ZJP RP

12 kV OB PVR RP




Manual TOV

35 00

TOV WITHSTAND ABILITY FOR SELECTED ARRESTERSAND FAULT CLEARING TIME


242/278

0.00

5.00

10.00

15.00

20.00

25.00

30.00

35.00

Vo

ltage

Withst

an

d(kV)

18 kV UltraSIL RP Vari

18 kV OB Optima

18 kV Evolution URT A

Higher TOV Withstand is Better

Manual TOV


243/278

STAR

rrester

Recommended ND TOV

18 00

TOV WITHSTAND ABILITY OF RECOMMENDED NORMAL DUTYARRESTERS BASED ON INPUT SYSTEM CONDITIONS


244/278

0.00

2.00

4.00

6.00

8.00

10.00

12.00

14.00

16.00

18.00

TOVWiths

tand

(kV)

10 kV Joslyn ZNP ND

12 kV OB PDV-65 ND



Recommended ND TOV


245/278

STAR

AP

Recommended HD TOV

18 000

TOV WITHSTAND ABILITY OF RECOMMENDED HEAVY DUTYARRESTERS BASED ON INPUT SYSTEM CONDITIONS


246/278

0.000

2.000

4.000

6.000

8.000

10.000

12.000

14.000

16.000

18.000

TOVWiths

tan

d(kV)

10 kV Joslyn ZHP HD

12 kV OB Optima

12 kV UltraSIL HD VariST

10 kV Evolution URT Arres


Recommended HD TOV


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R

ter

P

Recommended RP TOV

18.00

TOV WITHSTAND ABILITY OF RECOMMENDED RISER POLE ARRESTERSBASED ON INPUT SYSTEM CONDITIONS


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0.00

2.00

4.00

6.00

8.00

10.00

12.00

14.00

16.00

TOVWithstan

d(kV)

10 kV Joslyn ZJP RP

12 kV OB PVR RP



DirectStrikeCalc

Direct Strike Calculator

Enter structure height (h) in meters 11 meters

Enter Structure width (b) in meters 1 meters

Enter ground flash density flashes/km2/yr 4 flashes/km2/yr

Flash Collection Rate (n) is calculated --> 47.6 flashes/100km/yr

0.057 flashes/span(120m)/year


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0.057 flashes/span(120m)/year

17.5 years/flash/span(120)=Ng((28hexp.6 + b)/1

Page 249

MOPCalculator

Full Featured Margin of Protection Calculator for O

Select Equipment BILEquipment Chopped

Wave Withstand Equipment Switching

160

Equipment Marg

20% i th i iUltraSIL H


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10

Default Value

Arrester = 121.00 111.00 83.90Lead = 13.33 2.50 0.00

Total = 134.33 113.50 83.90

9

%

Select Equipment BIL

(kV)

Select ArresterRating (kV)

Wave Withstand

(kV)

77

Select Arrester to run Margin ofProtection Calculation on

Front of Wave Lightning Impulse Switching Impulse

-43

Equipment Switching

Withstand Level (kV)

SelectCurrent Levelto Evaluate

Margin (kA)

Arrester Front ofWave Protection

Arrester LightningProtection Level

Arrester SwitchingProtection Level

% %

70 58.1

-38 -31

UltraSIL Heavy Duty VariS10

Adjust Lead Length (ft) 5

36

70

Arrester+

Lead

0

20

40

60

80

100

120

140

160

Front of WaveProtectiveMargin L1

LiI

Protct

Vo

ltage

inkV

20% is the minimum

FP Margin %

-43

MOPCalculator


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Overhead and Power Transformer Margin of Protection Calculator

150 Transformer BIL

165 Transformer CWW135 Transformer BSL

MOPCalculator

R

at

in10kA 1/10

10kA

8/20500 10kA 1/10 10kA 8/20 500A 10kA 1/10 10kA 8/20 500A

UltraSIL Normal Duty

VariGAP

UltraSIL Heavy Duty

VariSTAR

UltraSIL Normal Duty

VariSTAR
http://www.cooperpower.com/Library/pdf/23537.pdfhttp://www.cooperpower.com/Library/pdf/23535.pdfhttp://www.cooperpower.com/Library/pdf/23535.pdfhttp://www.cooperpower.com/Library/pdf/23535.pdfhttp://www.cooperpower.com/Library/pdf/23535.pdfhttp://www.cooperpower.com/Library/pdf/23535.pdfhttp://www.cooperpower.com/Library/pdf/23535.pdfhttp://www.cooperpower.com/Library/pdf/23537.pdfhttp://www.cooperpower.com/Library/pdf/23537.pdf


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g8/ 0

3 12.5 11.4 8.7 12.2 11.1 8.4 11.5 9.9 7.96 24.9 22.7 17.3 24.5 22.3 16.9 23.0 19.8 15.99 36.0 32.8 24.9 26.8 24.4 18.5 33.1 29.8 22.9# 37.5 34.1 25.9 28.0 25.5 19.4 34.4 31.6 23.8

# 47.1 42.9 32.6 38.9 35.4 26.9 43.3 39.7 29.9# 58.9 53.6 40.7 42.5 38.7 29.4 54.1 48.0 37.4

# 70.7 64.3 48.9 51.8 47.1 35.8 64.9 59.6 44.8# 74.9 68.2 51.8 54.9 50.0 38.0 68.9 63.2 47.6# 87.5 79.6 60.5 68.7 62.5 47.5 80.3 73.1 55.5# 99.0 90.1 68.5 77.7 70.7 53.7 90.9 84.9 62.8# 109.9 100.0 76.0 82.4 75.0 57.0 101.0 92.4 70.0# 123.1 112.0 85.1 90.7 82.5 62.7 113.0 105.0 77.8# 131.9 120.0 91.2 96.5 87.8 66.7 121.0 111.0 83.9

# 2 3 4 5 6 7 8 9 10

RatingEquipment

BIL

1 UltraSIL Normal Duty VariSTAR 3 702 UltraSIL Normal Duty VariGAP 6 95

3 UltraSIL Heavy Duty VariSTAR 9 125

4 UltraSIL EX Arrester 10 150

5 UltraSIL Heavy Duty VariGAP 12 200

Arrester to use in the calculation

MOPCalculator


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Column that

contains

Selected

Arrester

Fast FrontData

Column

that

contains

Selected

ArresterV10kA

contains

Selected

Arrester

Switching

Surge

DischargeBoltage

Fast Front

Data

Selected at10kA

V10kA data

selected(8/20)

Switching

SurgeSelected

8 9 10 121.00 111.00 83.90

1 2 3 4 5 6 7 8

Front

Column

V10kA

Column

Switching

Column

k= kV/kV

rating nJoslyn Heavy Duty 35 36 37 2.29 0.158Joslyn Normal Duty 32 33 34 2.21 0.187Joslyn Riser Pole 38 39 40 1.91 0.146OB Heavy Duty 26 27 28 1.98 0.219OB Normal Duty 23 24 25 1.89 0.285OB Riser Pole 29 30 31 1.64 0.219UltraSIL EX Arrester 11 12 13 0.204UltraSIL Heavy Duty VariGAP 14 15 16 0.159UltraSIL Heavy Duty VariSTAR 8 9 10 2.31 0.159

UltraSIL Normal Duty VariGAP 5 6 7 0.204UltraSIL Normal Duty VariSTAR 2 3 4 2 28 0 204

Discharge Voltage Table Look

up Key

MOPCalculator

V1 111 kVI1 10 kA

I2 10 kA

N 0.159

(8/20) other currents based on nand V1 of the selected arrester

3


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Results 111.0 kV

MOPCalculator

verhead insulation

in of Protection using

recommended Margin of Protection

avy Duty VariSTAR


255/278

Arrester+

Lead

Arrester+

Lead

ghtningpulse

ive MarginL2

SwitchingImpulse

ProtectiveMargin S

Equipment Withstand

Arrester + Lead

recommended Margin of Protection

-38

LP Margin %

-31

SP Margin %

Note this model is notused for undergroundMOP calculations

MOPCalculator


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MOPCalculator

10kA 1/10 10kA 8/20 500A 10kA 1/10 10kA 8/20 500A 10kA 1/10 10kA 8/20 500A

UltraSIL Heavy Duty

VariGAPUltraSIL EX Arrester

UltraSIL Riser Pole

VariSTAR
http://www.cooperpower.com/Library/pdf/23537.pdfhttp://www.cooperpower.com/Library/pdf/23539.pdfhttp://www.cooperpower.com/Library/pdf/23537.pdfhttp://www.cooperpower.com/Library/pdf/23537.pdfhttp://www.cooperpower.com/Library/pdf/23537.pdfhttp://www.cooperpower.com/Library/pdf/23539.pdfhttp://www.cooperpower.com/Library/pdf/23537.pdfhttp://www.cooperpower.com/Library/pdf/23537.pdf


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20.0 10.2 7.6 18.5 10.2 7.8 10.3 9.4 7.123.0 20.3 15.2 24.0 20.4 15.5 20.7 18.7 14.232.4 23.8 17.8 30.0 22.5 17.1 29.8 27.0 20.532.4 25.4 19.0 32.0 23.3 17.7 31.0 28.1 21.4

52.4 31.8 23.8 36.0 32.3 24.5 39.1 35.4 26.955.4 38.5 28.8 42.0 35.4 26.9 48.7 44.1 33.5

64.8 47.8 35.7 47.5 43.1 32.8 58.4 52.9 40.264.8 50.6 37.8 53.5 45.8 34.8 62.0 56.2 42.787.8 58.6 43.8 59.0 57.2 43.5 72.3 65.5 49.897.2 68.0 50.8 65.0 64.7 49.2 81.4 73.8 56.1117.2 74.0 55.3 70.5 68.6 52.1 91.0 82.5 62.7120.2 84.0 62.8 76.5 75.5 57.4 100.0 90.9 69.1129.6 89.0 66.4 82.0 80.1 60.9 108.0 97.6 74.2

11 12 13 14 15 16 17 18 19

MOPCalculator

These values arederived from using kand n. K and n were

both derived from

V10kA and V40kA ofbli h d d t d


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Calculated

Fast Front

Data

Selected atEntered kA

Calculated

Lightning

Protective

Level at the

entered

Current(8/20)

83.90 0.00

published data andthe power

relationship.

Switched these 3 index numbers withthe HD Star numbers. This correctedthe issue of incorrect lookup of thevalues compared to the catalogsectionJJW 3-10-06

MOPCalculator

121

1.00

121 00

(1/10) other currents based on nand V1 of the selected arrester

V1 at 1/10 of selected

Arrester

8/20 Ratio of V1 to V2

of Selected Arrester


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121.00arrester based on V1

MOPCalculator

Crest

Current


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1.53

5

1020

30

405065100

Results 10

0

12

Selection

Lead

LengthDrop

MOPCalculator


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MOPCalculator

10kA 1/10 10kA 8/20 500A 5kA 1/10 10kA 8/20 500 A 10kA 1/10 10kA 8/20 500A

OB Normal DutyUltraSIL Riser Pole

VariGAPOB Heavy Duty
http://www.hubbellpowersystems.com/powertest/catalog_sections/PDF_ohio/31_dynavar.pdfhttp://www.cooperpower.com/Library/pdf/23535.pdfhttp://www.hubbellpowersystems.com/powertest/catalog_sections/PDF_ohio/31_dynavar.pdfhttp://www.hubbellpowersystems.com/powertest/catalog_sections/PDF_ohio/31_dynavar.pdfhttp://www.cooperpower.com/Library/pdf/23535.pdfhttp://www.cooperpower.com/Library/pdf/23535.pdfhttp://www.hubbellpowersystems.com/powertest/catalog_sections/PDF_ohio/31_dynavar.pdf


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17.5 9.2 7.0 14.0 12.3 8.5 10.6 9.9 7.623.0 18.4 14.0 27.8 24.5 17.0 21.3 19.8 15.329.0 20.4 15.5 37.5 33.0 23.0 31.2 29.0 22.431.0 21.2 16.1 40.9 36.0 24.0 34.0 31.6 24.4

35.0 29.4 22.3 55.7 49.0 31.3 40.4 37.6 29.041.0 32.2 24.5 65.3 57.5 39.9 51.4 47.8 36.9

46.5 39.2 29.8 75.0 66.0 46.4 60.6 56.4 43.552.5 41.6 31.6 82.9 73.0 50.5 68.3 63.5 49.058.0 52.0 39.5 102.8 90.5 62.7 81.9 76.2 58.864.0 58.8 44.7 112.5 99.0 71.2 91.9 85.5 65.969.5 62.4 47.4 122.7 108.0 77.7 101.1 94.0 72.575.5 68.6 52.1 0.0 0.0 0.0 0.0 0.0 0.081.0 72.8 55.3 150.0 132.0 92.0 121.4 112.9 87.0

20 21 22 23 24 25 26 27 28

MOPCalculator


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MOPCalculator


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MOPCalculator

Time toC t


265/278

Crest

12

3

45

6

78910

1

MOPCalculator


266/278

MOPCalculator

10kA 1/10 10kA 8/20 500 A 10kA 1/10 10kA 8/20 500 A 10kA 1/10 10kA 8/20 500 A

Joslyn Normal Duty Joslyn Heavy DutyOB Riser Pole
http://www.joslynmfg.com/characteristics.asphttp://www.joslynmfg.com/characteristics.asphttp://www.hubbellpowersystems.com/powertest/catalog_sections/PDF_ohio/31_dynavar.pdfhttp://www.hubbellpowersystems.com/powertest/catalog_sections/PDF_ohio/31_dynavar.pdfhttp://www.joslynmfg.com/characteristics.asphttp://www.joslynmfg.com/characteristics.asp


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9.9 9.1 6.6 0.0 0.0 0.0 10.4 10.2 7.820.0 18.3 13.3 0.0 0.0 0.0 20.7 20.7 15.526.8 24.5 17.8 29.9 30.5 23.7 31.0 29.6 23.329.5 27.0 19.6 32.9 33.9 26.3 34.5 32.1 25.9

35.5 32.5 23.6 0.0 0.0 0.0 41.3 38.5 31.044.2 40.5 29.4 0.0 0.0 0.0 51.7 47.9 38.853.4 48.9 35.5 59.7 61.0 47.4 62.0 58.0 46.560.7 55.6 40.3 0.0 0.0 0.0 72.3 62.1 54.370.9 64.9 47.1 0.0 0.0 0.0 82.6 77.7 62.178.6 72.0 52.2 0.0 0.0 0.0 92.9 87.3 69.988.5 81.0 58.7 0.0 0.0 0.0 103.3 96.9 77.60.0 0.0 0.0 0.0 0.0 0.0 0.0 - 0.0

105.0 96.0 69.7 0.0 0.0 0.0 124.0 116.1 93.1

29 30 31 32 33 34 35 36 37

MOPCalculator


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MOPCalculator


269/278

MOPCalculator


270/278

MOPCalculator


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MOPCalculator

10kA 1/10 10kA 8/20 500 A 10kA 1/10 10kA 8/20 500 A 10kA 1/10 10kA 8/20 500 A

Joslyn Riser Pole User Entered Arrester 1 User Entered Arrester 2
http://www.joslynmfg.com/cgi-bin/product_sub.asp?catid=8&ext=no&subname=ZJPhttp://www.joslynmfg.com/cgi-bin/product_sub.asp?catid=8&ext=no&subname=ZJPhttp://www.joslynmfg.com/cgi-bin/product_sub.asp?catid=8&ext=no&subname=ZJPhttp://www.joslynmfg.com/cgi-bin/product_sub.asp?catid=8&ext=no&subname=ZJPhttp://www.joslynmfg.com/cgi-bin/product_sub.asp?catid=8&ext=no&subname=ZJPhttp://www.joslynmfg.com/cgi-bin/product_sub.asp?catid=8&ext=no&subname=ZJP


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8.6 9.2 6.2 0.0 0.0 0.0 0.0 0.0 0.017.1 18.5 12.4 0.0 0.0 0.0 0.0 0.0 0.025.7 24.8 18.6 0.0 0.0 0.0 0.0 0.0 0.028.5 27.3 20.7 0.0 0.0 0.0 22.0 20.0 14.0

34.2 33.1 24.8 0.0 0.0 0.0 0.0 0.0 0.042.8 41.0 31.1 0.0 0.0 0.0 0.0 0.0 0.051.3 49.3 37.3 0.0 0.0 0.0 0.0 0.0 0.059.9 56.1 43.5 0.0 0.0 0.0 0.0 0.0 0.068.4 65.5 49.7 0.0 0.0 0.0 0.0 0.0 0.077.0 72.7 55.9 0.0 0.0 0.0 0.0 0.0 0.085.5 81.8 62.1 0.0 0.0 0.0 0.0 0.0 0.00.0 - 0.0 0.0 0.0 0.0 0.0 0.0 0.0

102.6 97.0 74.5 114.0 95.9 75.2 0.0 0.0 0.0

38 39 40 41 42 43 44 45 46

Input lead length (L) in feet -> 1

Lead length incentimeters 30.77 1000MCM 0.577

English unitsWire

Gauge #Radius in

inches

First find the Inductance of the lead wire

Inductance in uH = 0.002L [ln(2L/r) - .75]L = cm, r = cm

Metric Equivalent

1


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Select Wire Gauge (AWG) 2/0 500MCM 0.408

Lead radius (r) in Inches 0.18 Lead radius in cm 0.464 250MCM 0.288Total Inductance in uH 0.25

uH 0.25 4/0 0.230

uH/foot 0.255 uH/m 0.83 3/0 0.2052/0 0.1831/0 0.163

1 0.145.

3 0.1154 0.1025 0.0916 0.0817 0.0728 0.064

Enter Crest Current in kA -----> 3Enter Time to Crest of thecurrent in uS 2Total lead voltage in kV

0.4

Secondly find the voltage drop across the leadlength selected above

Suggested Values

V= Inductance * (di/dt)

V= total voltage (kV) , Inductance= total inductance (uH)

di = crest current (kA) , and dt = time to crest in us

3

2

Fuse

Surge

Fuse

SurgeSurg

eSurgeSurge


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The red lines indicatewhere the lead should becounted in the line lead

length

How to tell which lines are part of the line lead calculation:The best rule of thumb is to trace the surge current path anduse the lead that is in parallel with the protected insulation.

Line lead IdentificationSurge

Basic Assumptions in the text are as follows

1. 1.5 times CFO will result in flashover of the system2. Arrester discharge voltage is taken at V10kA

3. Zs is the system impedance and us usually 400 ohms

Probability of Flashover with a

IEEE Guide for Improving the Lightning

Performance of Overhead Distribution Lines

****IEEE 1410-1997 ****


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Section B.4.1 Equation B.14 and B.13

Wave velocity c (meters/sec) 300,000,000Rise Time Cf (Seconds) 0.000002(ohms) 400

Vir arrester discharge voltage (kV at 10kA)(volts) input--> 35000

Structure CFO (volts) input--> 350000Distance between poles (meters) input--> 40

Current at flashover point of adjacent pole(amps) in the line will be ------> 36750Probability of Flashover of unprotected pole

Pmid 39%

Incident voltage on system at current above(volts) 525000

Probability of Flashover with a

midspan strike

Semi Constants

Variables below

Output below

Probability of Flashover from a direct

t ik f t t d

Interpretation

This means that with the variables entered above, there is a

Pmid probability of flashover of the unprotected pole when astroke hits the midspan between protected and unprotected

poles


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Vir (kV at 10kA) (volts) 40000

Unprotected Structure CFO (volts) 350000

Arrester Pole Gnd Resistance Rg (Low currentgnd) ohms 10

Io at the flashover site (amps) 48500Probability of Flashover of unprotected pole 24%

Probability of Flashover from an nearby strikeThis calculator determines what voltage will be induced on a line

strike one span away from a protected

Interpretation

This means that since 98% of all strokes are above 7.4kA which

is the current needed to reach 1.5* CFO on the unprotected

pole there is a 98% probability of a flashover when struck one

span away from an arrester protected pole.

The probability of flashover is a strong function of the CFO of

the unprotected pole and the ground resistance of the protectedpole.

Input below

Output below

vo Velocity of light in space (m/s) --> 300,000,000

v velocity of return stroke (m/s) 150,000,000

Zo Lightning impedance (ohms) -------> 30

Input Variables

of given height when not striking the line, but striking at the

entered distance.

Semi Constants


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y shortest distance to line---> 60

Io lightning current (kA) -------> 40

h height of line (meters) -------> 11

V maximum induced voltage on a line under

above circumstances (kV) 303

Results

InterpretationIt is assumed that there is a 100% probability of flashover of an

insulator if the voltage across that insulator is 1.5 times its

stated CFO. Therefore if the above voltage is more than 1.5times the insulators used on the line then there will be a

flashover.

Crest Voltage (kV) is 3.55 2.51 rms

Peak Capacitive Current (mA) is 1.338 help

Peak Resistive Current (mA) is 0.563 helpPeak Total Current (mA) is 1.340 help

Losses (watts) 0.417 help

ValuesMOV Disk AC Conduction Simulation

MOV Disk AC Response SimulationDisk Voltage Capacitive Current

Raise

Voltage control

Lower

Disk CharacteristicsMCOV = 1.45 kV rmsRated = 1.66 kV rmsVref = 2.58 kV rms


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0 5

0

0.5

1

1.5

-1

0

1

2

3

4

kCurrent(mA)

skVoltage(kV)

g p

Resistive Current Total Current

Resistive Current

optimizer2008_2 calculo de pararrayos

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