SV POWER Lightning Protection Calculation Sheet_T.G Building

PROJECT : CLIENT :CLIENT'S CONSULTANT :E-BOP CONTRACTOR :-

1x 63 MW TPP AT KORBA,CHATTISGARH S V POWER PVT LTD DESEIN PVT LTD ABB LTD,FARIDABAD

LIGHTNING PROTECTION CALCULATION FOR TG BLDG.AB-BC BAY ( REFERENCE : IS 2309 ) Symbol / Formulae / Description / Parameter References A) CHECK FOR NEED OF PROVIDING LIGHTNING PROTECTION i) Input Data :a) Dimensions of Building / Structure L ( Refer the Relevant Layout W Drawings of the Building / H Structure )

Length of the Building Width of the Building Height of the Building

b)

Probable Number of Strikes to Building / Structure per Year ( Refer Clause 8.1.2 of IS 2309 ) Overall Multiplying Factor Overall Risk Factor Calculated

m m m

N Ng A B C D E

( Refer Fig. 1 of IS 2309 ) ( Refer Clause 8.1.2 of ( Refer Table 1A of IS 2309 ) ( Refer Table 1B of IS 2309 ) ( Refer Table 1C of IS 2309 ) ( Refer Table 1D of IS 2309 ) ( Refer Table 1E of IS 2309 )

= = = = = = =

Ac

=

(L x W) + 2 (L x H) + 2(W x H) + 3.14 H2

=

P

= Ac x Ng x 10-6 times/year =

100 No. of Days / Year 9.2 Nos./km2/year 1 0.8 1 0.4 0.3

Rf-C

= AxBxCxDxE Overall Multiplying = Factor x P

= = ie

7389.06 Meter2 0.067979 Times per year 0.096000 0.006526 6.5260E-03

Maximum Acceptable Overall Risk Factor:Maximum Acceptable Overall Risk Factor

iv)

60.00 28.00 23.00

Calculations :Collection Area ( Refer Clause 8.1.2 of IS 2309 )

iii)

= = =

Unit

Lightning Flash Density & Weighing Factors Number of Thunderstorm Days / Year Lightning Flash Density (Flashes to Ground /km2/year) Weighting Factor A ( Use of Structure ) Weighting Factor B ( Type of Construction ) Weighting Factor C ( Content of Consequential Effects ) Weighting Factor D ( Degree of Isolation ) Weighting Factor E ( Type of Country )

ii)

Value

Rf-A

( Refer Clauses 8.1.3 & 8.1.6 of IS 2309 )

=

0.000001

ie

1.000E-06

Result / Conclusion :Since Overall Risk Factor Calculated Maximum Acceptable Overall Risk Factor > Hence, Lightning Protection is Required.

B) CHECK FOR ADEQUACY OF NUMBER OF DOWN CONDUCTORS Calculations (As per Clause 12.2.3 of IS-2309):Ab = ( L x W ) Base Area of Structure P = 2(L+W) Perimeter of Structure i) For Base Area (Ab) < 100m2 a) Number of Down Conductors Required

ii)

= =

1680 Meter2 176 Meter

= For Ab < 100m2

=

1 Nos

= 1+(Ab-100)/300

=

6 Nos

For Base Area (Ab) > 100m2 b) Based on Base Area of Structure:Number of Down Conductors Required c) Based on Parimeter of Structure:Number of Down Conductors Required

REVISION DETAILS

= P/30 = 6 Nos. Note:- The Number of Down Conductor should be at least the smaller between b) & c) (as per clause 12.2.3b of IS-2309) = Hence, Required Number of Down Conductors 6 Nos.

Rev.

Date

Drg/Doc. No.

Remarks

Prepared

Reviewed

Approved

R0

12.10.2009

3VYN855200

First Submission

HK

KVP

KVP

1x70 MW TPP AT KORBA,CHATTISGARH RRVUNL DCPL, New Delhi Indure, New Delhi

PROJECT : CLIENT :CONSULTANT :BOP CONTRACTOR :-

LIGHTNING PROTECTION CALCULATION ( REFERENCE : IS 2309 ) FOR

CW PUMP HOUSE

Symbol / Formulae / References A) CHECK FOR NEED OF PROVIDING LIGHTNING PROTECTION i) Input Data :a) Dimensions of Building / Structure Description / Parameter

L ( Refer the Relevant Layout W Drawings of the Building / H Structure )

Length of the Building Width of the Building Height of the Building

b)

Probable Number of Strikes to Building / Structure per Year ( Refer Clause 8.1.2 of IS 2309 ) Overall Multiplying Factor Overall Risk Factor Calculated

m m m

N Ng A B C D E

( Refer Fig. 1 of IS 2309 ) ( Refer Clause 8.1.2 of ( Refer Table 1A of IS 2309 ) ( Refer Table 1B of IS 2309 ) ( Refer Table 1C of IS 2309 ) ( Refer Table 1D of IS 2309 ) ( Refer Table 1E of IS 2309 )

= = = = = = =

Ac

=

(L x W) + 2 (L x H) + 2(W x H) + 3.14 H2

=

P

= Ac x Ng x 10-6 times/year =

27 No. of Days / Year 5 Nos./km2/year 1 0.2 1 0.4 0.3

Rf-C

= AxBxCxDxE Overall Multiplying = Factor x P

= = ie

3452.79 Meter2 0.017264 Times per year 0.024000 0.000414 4.1434E-04

Maximum Acceptable Overall Risk Factor:Maximum Acceptable Overall Risk Factor

iv)

43.62 12.20 17.53

Calculations :Collection Area ( Refer Clause 8.1.2 of IS 2309 )

iii)

= = =

Unit

Lightning Flash Density & Weighing Factors Number of Thunderstorm Days / Year Lightning Flash Density (Flashes to Ground /km2/year) Weighting Factor A ( Use of Structure ) Weighting Factor B ( Type of Construction ) Weighting Factor C ( Content of Consequential Effects ) Weighting Factor D ( Degree of Isolation ) Weighting Factor E ( Type of Country )

ii)

Value

Rf-A

( Refer Clauses 8.1.3 & 8.1.6 of IS 2309 )

=

0.000001

ie

1.000E-06

Result / Conclusion :Since Overall Risk Factor Calculated Maximum Acceptable Overall Risk Factor > Hence, Lightning Protection is Required.

B) CHECK FOR ADEQUACY OF NUMBER OF DOWN CONDUCTORS Calculations (As per Clause 12.2.3 of IS-2309):Ab = ( L x W ) Base Area of Structure P = 2(L+W) Perimeter of Structure i) For Base Area (Ab) < 100m2 a) Number of Down Conductors Required

ii)

= =

532.10 Meter2 111.63 Meter

= For Ab < 100m2

=

1 Nos

= 1+(Ab-100)/300

=

2 Nos

For Base Area (Ab) > 100m2 b) Based on Base Area of Structure:Number of Down Conductors Required c) Based on Parimeter of Structure:Number of Down Conductors Required

REVISION DETAILS

= P/30 = 4 Nos. Note:- The Number of Down Conductor should be at least the smaller between b) & c) (as per clause 12.2.3b of IS-2309) = Hence, Required Number of Down Conductors 2 Nos.

Rev.

Date

Drg/Doc. No.

Remarks

Prepared

Reviewed

Approved

R0

30.06.2009

3VYN855200

First Submission

RK

PS

PAS

1x250MW SURATGARH S.T.P.S. Unit-6 (Stage-IV) RRVUNL DCPL, New Delhi Indure, New Delhi

PROJECT : CLIENT :CONSULTANT :BOP CONTRACTOR :-

LIGHTNING PROTECTION CALCULATION ( REFERENCE : IS 2309 ) FOR CW TREATMENT AREA Symbol / Formulae / References A) CHECK FOR NEED OF PROVIDING LIGHTNING PROTECTION i) Input Data :a) Dimensions of Building / Structure Description / Parameter

L ( Refer the Relevant Layout W Drawings of the Building / H Structure )

Length of the Building Width of the Building Height of the Building

b)

Probable Number of Strikes to Building / Structure per Year ( Refer Clause 8.1.2 of IS 2309 ) Overall Multiplying Factor Overall Risk Factor Calculated

m m m

N Ng A B C D E

( Refer Fig. 1 of IS 2309 ) ( Refer Clause 8.1.2 of ( Refer Table 1A of IS 2309 ) ( Refer Table 1B of IS 2309 ) ( Refer Table 1C of IS 2309 ) ( Refer Table 1D of IS 2309 ) ( Refer Table 1E of IS 2309 )

= = = = = = =

Ac

=

(L x W) + 2 (L x H) + 2(W x H) + 3.14 H2

=

P

= Ac x Ng x 10-6 times/year =

27 No. of Days / Year 5 Nos./km2/year 1 0.2 1 0.4 0.3

Rf-C

= AxBxCxDxE Overall Multiplying = Factor x P

= = ie

1999.25 Meter2 0.009996 Times per year 0.024000 0.000240 2.3991E-04

Maximum Acceptable Overall Risk Factor:Maximum Acceptable Overall Risk Factor

iv)

40.23 30.23 5.00

Calculations :Collection Area ( Refer Clause 8.1.2 of IS 2309 )

iii)

= = =

Unit

Lightning Flash Density & Weighing Factors Number of Thunderstorm Days / Year Lightning Flash Density (Flashes to Ground /km2/year) Weighting Factor A ( Use of Structure ) Weighting Factor B ( Type of Construction ) Weighting Factor C ( Content of Consequential Effects ) Weighting Factor D ( Degree of Isolation ) Weighting Factor E ( Type of Country )

ii)

Value

Rf-A

( Refer Clauses 8.1.3 & 8.1.6 of IS 2309 )

=

0.000001

ie

1.000E-06

Result / Conclusion :Since Overall Risk Factor Calculated Maximum Acceptable Overall Risk Factor > Hence, Lightning Protection is Required.

B) CHECK FOR ADEQUACY OF NUMBER OF DOWN CONDUCTORS Calculations (As per Clause 12.2.3 of IS-2309):Ab = ( L x W ) Base Area of Structure P = 2(L+W) Perimeter of Structure i) For Base Area (Ab) < 100m2 a) Number of Down Conductors Required

ii)

= =

1216.15 Meter2 140.92 Meter

= For Ab < 100m2

=

1 Nos

= 1+(Ab-100)/300

=

5 Nos

For Base Area (Ab) > 100m2 b) Based on Base Area of Structure:Number of Down Conductors Required c) Based on Parimeter of Structure:Number of Down Conductors Required

REVISION DETAILS

= P/30 = 5 Nos. Note:- The Number of Down Conductor should be at least the smaller between b) & c) (as per clause 12.2.3b of IS-2309) = Hence, Required Number of Down Conductors 5 Nos.

Rev. R0

Date

Drg/Doc. No.

30.06.2009 3VYN855200

Remarks

Prepared

Reviewed

Approved

First Submission

RK

PS

PAS

1x250MW SURATGARH S.T.P.S. Unit-6 (Stage-IV) RRVUNL DCPL, New Delhi Indure, New Delhi

PROJECT : CLIENT :CONSULTANT :BOP CONTRACTOR :-

LIGHTNING PROTECTION CALCULATION ( REFERENCE : IS 2309 ) FOR RAW WATER PUMP HOUSE Symbol / Formulae / References A) CHECK FOR NEED OF PROVIDING LIGHTNING PROTECTION i) Input Data :a) Dimensions of Building / Structure Description / Parameter

L ( Refer the Relevant Layout W Drawings of the Building / H Structure )

Length of the Building Width of the Building Height of the Building

b)

Probable Number of Strikes to Building / Structure per Year ( Refer Clause 8.1.2 of IS 2309 ) Overall Multiplying Factor Overall Risk Factor Calculated

m m m

N Ng A B C D E

( Refer Fig. 1 of IS 2309 ) ( Refer Clause 8.1.2 of ( Refer Table 1A of IS 2309 ) ( Refer Table 1B of IS 2309 ) ( Refer Table 1C of IS 2309 ) ( Refer Table 1D of IS 2309 ) ( Refer Table 1E of IS 2309 )

= = = = = = =

Ac

=

(L x W) + 2 (L x H) + 2(W x H) + 3.14 H2

=

P

= Ac x Ng x 10-6 times/year =

27 No. of Days / Year 5 Nos./km2/year 1 0.2 1 0.4 0.3

Rf-C

= AxBxCxDxE Overall Multiplying = Factor x P

= = ie

1542.54 Meter2 0.007713 Times per year 0.024000 0.000185 1.8510E-04

Maximum Acceptable Overall Risk Factor:Maximum Acceptable Overall Risk Factor

iv)

33.30 8.60 10.70

Calculations :Collection Area ( Refer Clause 8.1.2 of IS 2309 )

iii)

= = =

Unit

Lightning Flash Density & Weighing Factors Number of Thunderstorm Days / Year Lightning Flash Density (Flashes to Ground /km2/year) Weighting Factor A ( Use of Structure ) Weighting Factor B ( Type of Construction ) Weighting Factor C ( Content of Consequential Effects ) Weighting Factor D ( Degree of Isolation ) Weighting Factor E ( Type of Country )

ii)

Value

Rf-A

( Refer Clauses 8.1.3 & 8.1.6 of IS 2309 )

=

0.000001

ie

1.000E-06

Result / Conclusion :Since Overall Risk Factor Calculated Maximum Acceptable Overall Risk Factor > Hence, Lightning Protection is Required.

B) CHECK FOR ADEQUACY OF NUMBER OF DOWN CONDUCTORS Calculations (As per Clause 12.2.3 of IS-2309):Ab = ( L x W ) Base Area of Structure P = 2(L+W) Perimeter of Structure i) For Base Area (Ab) < 100m2 a) Number of Down Conductors Required

ii)

= =

286.38 Meter2 83.8 Meter

= For Ab < 100m2

=

1 Nos

= 1+(Ab-100)/300

=

2 Nos

For Base Area (Ab) > 100m2 b) Based on Base Area of Structure:Number of Down Conductors Required c) Based on Parimeter of Structure:Number of Down Conductors Required

REVISION DETAILS

= P/30 = 3 Nos. Note:- The Number of Down Conductor should be at least the smaller between b) & c) (as per clause 12.2.3b of IS-2309) = Hence, Required Number of Down Conductors 2 Nos.

Rev.

Date

Drg/Doc. No.

Remarks

Prepared

Reviewed

Approved

R0

30.06.2009

3VYN855200

First Submission

RK

PS

PAS

1x250MW SURATGARH S.T.P.S. Unit-6 (Stage-IV) RRVUNL DCPL, New Delhi Indure, New Delhi

PROJECT : CLIENT :CONSULTANT :BOP CONTRACTOR :-

LIGHTNING PROTECTION CALCULATION ( Reference : IS 2309 ) for Description / Parameter

RWPH MCC Room

Symbol / Formulae / References

Value

Unit

A) CHECK FOR NEED OF PROVIDING LIGHTNING PROTECTION i) Input Data :a) Dimensions of Building / Structure L ( Refer the Relevant Layout W Drawings of the Building / H Structure )

Length of the Building Width of the Building Height of the Building

b)

Lightning Flash Density (Flashes to Ground /km2/year) Weighting Factor A ( Use of Structure ) Weighting Factor B ( Type of Construction ) Weighting Factor C ( Content of Consequential Effects ) Weighting Factor D ( Degree of Isolation ) Weighting Factor E ( Type of Country )

Probable Number of Strikes to Building / Structure per Year ( Refer Clause 8.1.2 of IS 2309 ) Overall Multiplying Factor Overall Risk Factor Calculated

N Ng A B C D E

( Refer Fig. 1 of IS 2309 ) = (Refer Clause 8.1.2 of IS 2309) = ( Refer Table 1A of IS 2309 ) = ( Refer Table 1B of IS 2309 ) = ( Refer Table 1C of IS 2309 ) = ( Refer Table 1D of IS 2309 ) = ( Refer Table 1E of IS 2309 ) =

Ac

=

(L x W) + 2 (L x H) + 2(W x H) + 3.14 H2

=

P

= Ac x Ng x 10-6 times/year

=

27 No. of Days / Year 5 Nos./km2/year 1 0.2 1 0.4 0.3

Rf-C

= AxBxCxDxE = Overall Multiplying Factor = = xP ie

628.27 Meter2 0.003141 Times per year 0.024000 0.000075 7.5392E-05

Maximum Acceptable Overall Risk Factor:Maximum Acceptable Overall Risk Factor

iv)

m m m

Calculations :Collection Area ( Refer Clause 8.1.2 of IS 2309 )

iii)

22.80 9.81 5.00

Lightning Flash Density & Weighing Factors Number of Thunderstorm Days / Year

ii)

= = =

Rf-A

( Refer Clauses 8.1.3 & 8.1.6 of IS 2309 )

=

0.000001

ie

1.000E-06

Result / Conclusion :Since Overall Risk Factor Calculated Maximum Acceptable Overall Risk Factor > Hence, Lightning Protection is Required.

B) CHECK FOR ADEQUACY OF NUMBER OF DOWN CONDUCTORS Calculations (As per Clause 12.2.3 of IS-2309):Ab = ( L x W ) Base Area of Structure P = 2(L+W) Perimeter of Structure i) For Base Area (Ab) < 100m2 a) Number of Down Conductors Required

ii)

= =

223.67 Meter2 65.22 Meter

= For Ab < 100m2

=

1 Nos

= 1+(Ab-100)/300

=

1 Nos

For Base Area (Ab) > 100m2 b) Based on Base Area of Structure:Number of Down Conductors Required c) Based on Parimeter of Structure:Number of Down Conductors Required

REVISION DETAILS

= P/30 = 2 Nos. Note:- The Number of Down Conductor should be at least the smaller between b) & c) (as per clause 12.2.3b of IS-2309) = Hence, Required Number of Down Conductors 1 Nos.

Rev.

Date

Drg/Doc. No.

Remarks

Prepared

Reviewed

Approved

R0

30.06.2009

3VYN855200

First Submission

RK

PS

PAS

1x250MW SURATGARH S.T.P.S. Unit-6 (Stage-IV) RRVUNL DCPL, New Delhi Indure, New Delhi

PROJECT : CLIENT :CONSULTANT :BOP CONTRACTOR :-

LIGHTNING PROTECTION CALCULATION ( REFERENCE : IS 2309 ) FOR Description / Parameter

PRIMARY CRUSHER HOUSE

Symbol / Formulae / References

Value

Unit

A) CHECK FOR NEED OF PROVIDING LIGHTNING PROTECTION i) Input Data :a) Dimensions of Building / Structure L ( Refer the Relevant Layout W Drawings of the Building / H Structure )

Length of the Building Width of the Building Height of the Building

b)

Lightning Flash Density (Flashes to Ground /km2/year) Weighting Factor A ( Use of Structure ) Weighting Factor B ( Type of Construction ) Weighting Factor C ( Content of Consequential Effects ) Weighting Factor D ( Degree of Isolation ) Weighting Factor E ( Type of Country )

Probable Number of Strikes to Building / Structure per Year ( Refer Clause 8.1.2 of IS 2309 ) Overall Multiplying Factor Overall Risk Factor Calculated

N Ng A B C D E

( Refer Fig. 1 of IS 2309 ) = (Refer Clause 8.1.2 of IS 2309) = ( Refer Table 1A of IS 2309 ) = ( Refer Table 1B of IS 2309 ) = ( Refer Table 1C of IS 2309 ) = ( Refer Table 1D of IS 2309 ) = ( Refer Table 1E of IS 2309 ) =

Ac

=

(L x W) + 2 (L x H) + 2(W x H) + 3.14 H2

=

P

= Ac x Ng x 10-6 times/year

=

27 No. of Days / Year 5 Nos./km2/year 1 0.2 1 0.4 0.3

Rf-C

= AxBxCxDxE = Overall Multiplying Factor = = xP ie

3904.39 Meter2 0.019522 Times per year 0.024000 0.000469 4.6853E-04

Maximum Acceptable Overall Risk Factor:Maximum Acceptable Overall Risk Factor

iv)

m m m

Calculations :Collection Area ( Refer Clause 8.1.2 of IS 2309 )

iii)

23.00 21.50 21.70

Lightning Flash Density & Weighing Factors Number of Thunderstorm Days / Year

ii)

= = =

Rf-A

( Refer Clauses 8.1.3 & 8.1.6 of IS 2309 )

=

0.000001

ie

1.000E-06

Result / Conclusion :Since Overall Risk Factor Calculated Maximum Acceptable Overall Risk Factor > Hence, Lightning Protection is Required.

B) CHECK FOR ADEQUACY OF NUMBER OF DOWN CONDUCTORS Calculations (As per Clause 12.2.3 of IS-2309):Ab = ( L x W ) Base Area of Structure P = 2(L+W) Perimeter of Structure i) For Base Area (Ab) < 100m2 a) Number of Down Conductors Required

ii)

For Base Area (Ab) > 100m

= =

494.50 Meter2 89 Meter

= For Ab < 100m2

=

1 Nos

= 1+(Ab-100)/300

=

2 Nos

2

b) Based on Base Area of Structure:Number of Down Conductors Required c) Based on Parimeter of Structure:Number of Down Conductors Required

REVISION DETAILS

= P/30 = 3 Nos. Note:- The Number of Down Conductor should be at least the smaller between b) & c) (as per clause 12.2.3b of IS-2309) = Hence, Required Number of Down Conductors 2 Nos.

Rev.

Date

Drg/Doc. No.

Remarks

Prepared

Reviewed

Approved

R0

30.06.2009

3VYN855200

First Submission

RK

PS

PAS

1x250MW SURATGARH S.T.P.S. Unit-6 (Stage-IV) RRVUNL DCPL, New Delhi Indure, New Delhi

PROJECT : CLIENT :CONSULTANT :BOP CONTRACTOR :-

LIGHTNING PROTECTION CALCULATION ( REFERENCE : IS 2309 ) FOR Description / Parameter

SECONDARY CRUSHER HOUSE

Symbol / Formulae / References

Value

Unit

A) CHECK FOR NEED OF PROVIDING LIGHTNING PROTECTION i) Input Data :a) Dimensions of Building / Structure L ( Refer the Relevant Layout W Drawings of the Building / H Structure )

Length of the Building Width of the Building Height of the Building

b)

Lightning Flash Density (Flashes to Ground /km2/year) Weighting Factor A ( Use of Structure ) Weighting Factor B ( Type of Construction ) Weighting Factor C ( Content of Consequential Effects ) Weighting Factor D ( Degree of Isolation ) Weighting Factor E ( Type of Country )

Probable Number of Strikes to Building / Structure per Year ( Refer Clause 8.1.2 of IS 2309 ) Overall Multiplying Factor Overall Risk Factor Calculated

N Ng A B C D E

( Refer Fig. 1 of IS 2309 ) = (Refer Clause 8.1.2 of IS 2309) = ( Refer Table 1A of IS 2309 ) = ( Refer Table 1B of IS 2309 ) = ( Refer Table 1C of IS 2309 ) = ( Refer Table 1D of IS 2309 ) = ( Refer Table 1E of IS 2309 ) =

Ac

=

(L x W) + 2 (L x H) + 2(W x H) + 3.14 H2

=

P

= Ac x Ng x 10-6 times/year

=

27 No. of Days / Year 5 Nos./km2/year 1 0.2 1 0.4 0.3

Rf-C

= AxBxCxDxE = Overall Multiplying Factor = = xP ie

5181.47 Meter2 0.025907 Times per year 0.024000 0.000622 6.2178E-04

Maximum Acceptable Overall Risk Factor:Maximum Acceptable Overall Risk Factor

iv)

m m m

Calculations :Collection Area ( Refer Clause 8.1.2 of IS 2309 )

iii)

38.00 17.40 24.20

Lightning Flash Density & Weighing Factors Number of Thunderstorm Days / Year

ii)

= = =

Rf-A

( Refer Clauses 8.1.3 & 8.1.6 of IS 2309 )

=

0.000001

ie

1.000E-06

Result / Conclusion :Since Overall Risk Factor Calculated Maximum Acceptable Overall Risk Factor > Hence, Lightning Protection is Required.

B) CHECK FOR ADEQUACY OF NUMBER OF DOWN CONDUCTORS Calculations (As per Clause 12.2.3 of IS-2309):Ab = ( L x W ) Base Area of Structure P = 2(L+W) Perimeter of Structure i) For Base Area (Ab) < 100m2 a) Number of Down Conductors Required

ii)

= =

661.20 Meter2 110.8 Meter

= For Ab < 100m2

=

1 Nos

= 1+(Ab-100)/300

=

3 Nos

For Base Area (Ab) > 100m2 b) Based on Base Area of Structure:Number of Down Conductors Required c) Based on Parimeter of Structure:Number of Down Conductors Required

REVISION DETAILS

= P/30 = 4 Nos. Note:- The Number of Down Conductor should be at least the smaller between b) & c) (as per clause 12.2.3b of IS-2309) = Hence, Required Number of Down Conductors 3 Nos.

Rev.

Date

Drg/Doc. No.

Remarks

Prepared

Reviewed

Approved

R0

30.06.2009

3VYN855200

First Submission

RK

PS

PAS

1x250MW SURATGARH S.T.P.S. Unit-6 (Stage-IV) RRVUNL DCPL, New Delhi Indure, New Delhi

PROJECT : CLIENT :CONSULTANT :BOP CONTRACTOR :-

LIGHTNING PROTECTION CALCULATION ( REFERENCE : IS 2309 ) FOR WAGON TIPPLER AREA Description / Parameter

Symbol / Formulae / References

Value

Unit

A) CHECK FOR NEED OF PROVIDING LIGHTNING PROTECTION i) Input Data :a) Dimensions of Building / Structure L ( Refer the Relevant Layout W Drawings of the Building / H Structure )

Length of the Building Width of the Building Height of the Building

b)

Lightning Flash Density (Flashes to Ground /km2/year) Weighting Factor A ( Use of Structure ) Weighting Factor B ( Type of Construction ) Weighting Factor C ( Content of Consequential Effects ) Weighting Factor D ( Degree of Isolation ) Weighting Factor E ( Type of Country )

Probable Number of Strikes to Building / Structure per Year ( Refer Clause 8.1.2 of IS 2309 ) Overall Multiplying Factor Overall Risk Factor Calculated

N Ng A B C D E

( Refer Fig. 1 of IS 2309 ) = (Refer Clause 8.1.2 of IS 2309) = ( Refer Table 1A of IS 2309 ) = ( Refer Table 1B of IS 2309 ) = ( Refer Table 1C of IS 2309 ) = ( Refer Table 1D of IS 2309 ) = ( Refer Table 1E of IS 2309 ) =

Ac

=

(L x W) + 2 (L x H) + 2(W x H) + 3.14 H2

=

P

= Ac x Ng x 10-6 times/year

=

27 No. of Days / Year 5 Nos./km2/year 1 0.8 1 0.4 0.3

Rf-C

= AxBxCxDxE = Overall Multiplying Factor = = xP ie

4113.54 Meter2 0.020568 Times per year 0.096000 0.001974 1.9745E-03

Maximum Acceptable Overall Risk Factor:Maximum Acceptable Overall Risk Factor

iv)

m m m

Calculations :Collection Area ( Refer Clause 8.1.2 of IS 2309 )

iii)

41.00 18.00 19.00

Lightning Flash Density & Weighing Factors Number of Thunderstorm Days / Year

ii)

= = =

Rf-A

( Refer Clauses 8.1.3 & 8.1.6 of IS 2309 )

=

0.000001

ie

1.000E-06

Result / Conclusion :Since Overall Risk Factor Calculated Maximum Acceptable Overall Risk Factor > Hence, Lightning Protection is Required.

B) CHECK FOR ADEQUACY OF NUMBER OF DOWN CONDUCTORS Calculations (As per Clause 12.2.3 of IS-2309):Ab = ( L x W ) Base Area of Structure P = 2(L+W) Perimeter of Structure i) For Base Area (Ab) < 100m2 a) Number of Down Conductors Required

ii)

For Base Area (Ab) > 100m

= =

738.00 Meter2 118 Meter

= For Ab < 100m2

=

1 Nos

= 1+(Ab-100)/300

=

3 Nos

2

b) Based on Base Area of Structure:Number of Down Conductors Required c) Based on Parimeter of Structure:Number of Down Conductors Required

REVISION DETAILS

= P/30 = 4 Nos. Note:- The Number of Down Conductor should be at least the smaller between b) & c) (as per clause 12.2.3b of IS-2309) = Hence, Required Number of Down Conductors 3 Nos.

Rev.

Date

Drg/Doc. No.

Remarks

Prepared

Reviewed

Approved

R0

30.06.2009

3VYN855200

First Submission

RK

PS

PAS

1x250MW SURATGARH S.T.P.S. Unit-6 (Stage-IV) RRVUNL DCPL, New Delhi Indure, New Delhi

PROJECT : CLIENT :CONSULTANT :BOP CONTRACTOR :-

LIGHTNING PROTECTION CALCULATION ( REFERENCE : IS 2309 ) FOR DRIVE HOUSE Description / Parameter

Symbol / Formulae / References

Value

Unit

A) CHECK FOR NEED OF PROVIDING LIGHTNING PROTECTION i) Input Data :a) Dimensions of Building / Structure L ( Refer the Relevant Layout W Drawings of the Building / H Structure )

Length of the Building Width of the Building Height of the Building

b)

Lightning Flash Density (Flashes to Ground /km2/year) Weighting Factor A ( Use of Structure ) Weighting Factor B ( Type of Construction ) Weighting Factor C ( Content of Consequential Effects ) Weighting Factor D ( Degree of Isolation ) Weighting Factor E ( Type of Country )

Probable Number of Strikes to Building / Structure per Year ( Refer Clause 8.1.2 of IS 2309 ) Overall Multiplying Factor Overall Risk Factor Calculated

N Ng A B C D E

( Refer Fig. 1 of IS 2309 ) = (Refer Clause 8.1.2 of IS 2309) = ( Refer Table 1A of IS 2309 ) = ( Refer Table 1B of IS 2309 ) = ( Refer Table 1C of IS 2309 ) = ( Refer Table 1D of IS 2309 ) = ( Refer Table 1E of IS 2309 ) =

Ac

=

(L x W) + 2 (L x H) + 2(W x H) + 3.14 H2

=

P

= Ac x Ng x 10-6 times/year

=

27 No. of Days / Year 5 Nos./km2/year 1 0.2 1 0.4 0.3

Rf-C

= AxBxCxDxE = Overall Multiplying Factor = = xP ie

450.25 Meter2 0.002251 Times per year 0.024000 0.000054 5.4030E-05

Maximum Acceptable Overall Risk Factor:Maximum Acceptable Overall Risk Factor

iv)

m m m

Calculations :Collection Area ( Refer Clause 8.1.2 of IS 2309 )

iii)

15.50 8.50 5.00

Lightning Flash Density & Weighing Factors Number of Thunderstorm Days / Year

ii)

= = =

Rf-A

( Refer Clauses 8.1.3 & 8.1.6 of IS 2309 )

=

0.000001

ie

1.000E-06

Result / Conclusion :Since Overall Risk Factor Calculated Maximum Acceptable Overall Risk Factor > Hence, Lightning Protection is Required.

B) CHECK FOR ADEQUACY OF NUMBER OF DOWN CONDUCTORS Calculations (As per Clause 12.2.3 of IS-2309):Ab = ( L x W ) Base Area of Structure P = 2(L+W) Perimeter of Structure i) For Base Area (Ab) < 100m2 a) Number of Down Conductors Required

ii)

= =

131.75 Meter2 48 Meter

= For Ab < 100m2

=

1 Nos

= 1+(Ab-100)/300

=

1 Nos

For Base Area (Ab) > 100m2 b) Based on Base Area of Structure:Number of Down Conductors Required c) Based on Parimeter of Structure:Number of Down Conductors Required

REVISION DETAILS

= P/30 = 2 Nos. Note:- The Number of Down Conductor should be at least the smaller between b) & c) (as per clause 12.2.3b of IS-2309) = Hence, Required Number of Down Conductors 1 Nos.

Rev.

Date

Drg/Doc. No.

Remarks

Prepared

Reviewed

Approved

R0

30.06.2009

3VYN855200

First Submission

RK

PS

PAS