5/21/2018 99077475 SV POWER Lightning Protection Calculation Sheet T G Building

1/11

PROJECT : -

CLIENT :-

CLIENT'S CONSULTANT :-

E-BOP CONTRACTOR :-

i) Input Data :-a) Dimensions of Building / Structure

Length of the Building L = 60.00 m

Width of the Building W = 28.00 m

Height of the Building H = 23.00 m

b) Lightning Flash Density & Weighing FactorsNumber of Thunderstorm Days / Year N = 100 No. of Days / Year

Li htnin Flash Densit (Flashes to Ground /km2/ ear) Ng = 9.2 Nos./km

2/ ear

Weighting Factor A ( Use of Structure ) A ( Refer Table 1A of IS 2309 ) = 1

Weighting Factor B ( Type of Construction ) B ( Refer Table 1B of IS 2309 ) = 0.8

Weighting Factor C ( Content of Consequential Effects ) C ( Refer Table 1C of IS 2309 ) = 1

Weighting Factor D ( Degree of Isolation ) D ( Refer Table 1D of IS 2309 ) = 0.4

Weighting Factor E ( Type of Country ) E ( Refer Table 1E of IS 2309 ) = 0.3

ii) Calculations :-

Overall Multiplying Factor = AxBxCxDxE = 0.096000

= 0.006526

ie 6.5260E-03

iii) Maximum Acceptable Overall Risk Factor:-

= 0.000001

ie 1.000E-06

iv) Result / Conclusion :-

>

Calculations (As per Clause 12.2.3 of IS-2309):-

Base Area of Structure Ab = = 1680 Meter2Perimeter of Structure P = = 176 Meter

i) For Base Area (Ab) < 100m2

a) Number of Down Conductors Required = = 1 Nos

ii) For Base Area (Ab) > 100m2

b) Based on Base Area of Structure:-

= = 6 Nos

c) Based on Parimeter of Structure:-

= = 6 Nos.

Hence, Required Number of Down Conductors = 6 Nos.

Rev. Date Drg/Doc. No. Reviewed ApprovedR0 12.10.2009 KVP KVP

Probable Number of Strikes to Building / Structure per Year (

Refer Clause 8.1.2 of IS 2309 )

B) CHECK FOR ADEQUACY OF NUMBER OF DOWN CONDUCTORS

( REFERENCE : IS 2309 )

= 0.067979 Times per year

Collection Area ( Refer Clause 8.1.2 of IS 2309 )

P

=(L x W) + 2 (L x H) +

2(W x H) + 3.14 H2=

1+(Ab-100)/300

Note:- The Number of Down Conductor should be at least the smaller between b) & c) (as per clause 12.2.3b of IS-2309)

Rf-C

Rf-AMaximum Acceptable Overall Risk Factor( Refer Clauses 8.1.3 &

8.1.6 of IS 2309 )

Hence, Lightning Protection is Required.

Since Overall Risk Factor Calculated Maximum Acceptable Overall Risk Factor

HK

7389.06 Meter2

Description / Parameter

A) CHECK FOR NEED OF PROVIDING LIGHTNING PROTECTION

Ac

Symbol / Formulae /

References

For Ab < 100m2

Number of Down Conductors Required

Overall Multiplying

Factor x P

( Refer Fig. 1 of IS 2309 )

Ac x Ng x 10-6

times/year

=

P/30

LIGHTNING PROTECTION CALCULATION FOR TG BLDG.AB-BC BAY

Overall Risk Factor Calculated

( L x W )2(L+W)

Number of Down Conductors Required

REVISION

DETAILS

3VYN855200

Value

=

Prepared

( Refer Clause 8.1.2 of

( Refer the Relevant Layout

Drawings of the Building /

Structure )

RemarksFirst Submission

1x 63 MW TPP AT KORBA,CHATTISGARH

S V POWER PVT LTD

DESEIN PVT LTD

ABB LTD,FARIDABAD

Unit

5/21/2018 99077475 SV POWER Lightning Protection Calculation Sheet T G Building

2/11

PROJECT : -

CLIENT :-

CONSULTANT :-

BOP CONTRACTOR :-

i) Input Data :-a) Dimensions of Building / Structure

Length of the Building L = 43.62 m

Width of the Building W = 12.20 m

Height of the Building H = 17.53 m

b) Lightning Flash Density & Weighing FactorsNumber of Thunderstorm Days / Year N = 27 No. of Days / Year

Li htnin Flash Densit (Flashes to Ground /km2/ ear) Ng = 5 Nos./km

2/ ear

Weighting Factor A ( Use of Structure ) A ( Refer Table 1A of IS 2309 ) = 1

Weighting Factor B ( Type of Construction ) B ( Refer Table 1B of IS 2309 ) = 0.2

Weighting Factor C ( Content of Consequential Effects ) C ( Refer Table 1C of IS 2309 ) = 1

Weighting Factor D ( Degree of Isolation ) D ( Refer Table 1D of IS 2309 ) = 0.4

Weighting Factor E ( Type of Country ) E ( Refer Table 1E of IS 2309 ) = 0.3

ii) Calculations :-

Overall Multiplying Factor = AxBxCxDxE = 0.024000

= 0.000414

ie 4.1434E-04

iii) Maximum Acceptable Overall Risk Factor:-

= 0.000001

ie 1.000E-06

iv) Result / Conclusion :-

>

Calculations (As per Clause 12.2.3 of IS-2309):-

Base Area of Structure Ab = = 532.10 Meter2Perimeter of Structure P = = 111.63 Meter

i) For Base Area (Ab) < 100m2

a) Number of Down Conductors Required = = 1 Nos

ii) For Base Area (Ab) > 100m2

b) Based on Base Area of Structure:-

= = 2 Nos

c) Based on Parimeter of Structure:-

= = 4 Nos.

Hence, Required Number of Down Conductors = 2 Nos.

Rev. Date Drg/Doc. No. Reviewed ApprovedR0 30.06.2009 PS PAS

REVISION

DETAILS

3VYN855200

RemarksFirst Submission

Prepared

1x70 MW TPP AT KORBA,CHATTISGARH

RRVUNL

DCPL, New Delhi

( Refer Clause 8.1.2 of

( Refer the Relevant Layout

Drawings of the Building /

Structure )

( Refer Fig. 1 of IS 2309 )

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

2(W x H) + 3.14 H2= 3452.79

RK

CW PUMP HOUSE

Meter2

Description / Parameter

A) CHECK FOR NEED OF PROVIDING LIGHTNING PROTECTION

Ac

Symbol / Formulae /

ReferencesValue Unit

=

Indure, New Delhi

For Ab < 100m2

=

LIGHTNING PROTECTION CALCULATION ( REFERENCE : IS 2309 ) FOR

= 0.017264 Times per year

Collection Area ( Refer Clause 8.1.2 of IS 2309 )

P

Overall Multiplying

Factor x POverall Risk Factor Calculated

( L x W )2(L+W)

Since Overall Risk Factor Calculated Maximum Acceptable Overall Risk Factor

P/30

B) CHECK FOR ADEQUACY OF NUMBER OF DOWN CONDUCTORS

Number of Down Conductors Required

Number of Down Conductors Required 1+(Ab-100)/300

= Ac x Ng x 10-6

times/yearProbable Number of Strikes to Building / Structure per Year (

Refer Clause 8.1.2 of IS 2309 )

Note:- The Number of Down Conductor should be at least the smaller between b) & c) (as per clause 12.2.3b of IS-2309)

Rf-C

Rf-AMaximum Acceptable Overall Risk Factor( Refer Clauses 8.1.3 &

8.1.6 of IS 2309 )

Hence, Lightning Protection is Required.

5/21/2018 99077475 SV POWER Lightning Protection Calculation Sheet T G Building

3/11

PROJECT : -

CLIENT :-

CONSULTANT :-

BOP CONTRACTOR :-

i) Input Data :-a) Dimensions of Building / Structure

Length of the Building L = 40.23 m

Width of the Building W = 30.23 m

Height of the Building H = 5.00 m

b) Lightning Flash Density & Weighing FactorsNumber of Thunderstorm Days / Year N = 27 No. of Days / Year

Li htnin Flash Densit (Flashes to Ground /km2/ ear) Ng = 5 Nos./km

2/ ear

Weighting Factor A ( Use of Structure ) A ( Refer Table 1A of IS 2309 ) = 1

Weighting Factor B ( Type of Construction ) B ( Refer Table 1B of IS 2309 ) = 0.2

Weighting Factor C ( Content of Consequential Effects ) C ( Refer Table 1C of IS 2309 ) = 1

Weighting Factor D ( Degree of Isolation ) D ( Refer Table 1D of IS 2309 ) = 0.4

Weighting Factor E ( Type of Country ) E ( Refer Table 1E of IS 2309 ) = 0.3

ii) Calculations :-

Overall Multiplying Factor = AxBxCxDxE = 0.024000

= 0.000240

ie 2.3991E-04

iii) Maximum Acceptable Overall Risk Factor:-

= 0.000001

ie 1.000E-06

iv) Result / Conclusion :-

>

Calculations (As per Clause 12.2.3 of IS-2309):-

Base Area of Structure Ab = = 1216.15 Meter2Perimeter of Structure P = = 140.92 Meter

i) For Base Area (Ab) < 100m2

a) Number of Down Conductors Required = = 1 Nos

ii) For Base Area (Ab) > 100m2

b) Based on Base Area of Structure:-

= = 5 Nos

c) Based on Parimeter of Structure:-

= = 5 Nos.

Hence, Required Number of Down Conductors = 5 Nos.

Rev. Date Drg/Doc. No. Reviewed ApprovedR0 30.06.2009 PS PAS

= Ac x Ng x 10-6

times/yearProbable Number of Strikes to Building / Structure per Year (

Refer Clause 8.1.2 of IS 2309 )

Note:- The Number of Down Conductor should be at least the smaller between b) & c) (as per clause 12.2.3b of IS-2309)

Rf-C

Rf-AMaximum Acceptable Overall Risk Factor( Refer Clauses 8.1.3 &

8.1.6 of IS 2309 )

Hence, Lightning Protection is Required.

P/30

B) CHECK FOR ADEQUACY OF NUMBER OF DOWN CONDUCTORS

Number of Down Conductors Required

Number of Down Conductors Required 1+(Ab-100)/300

Overall Risk Factor Calculated

( L x W )2(L+W)

Since Overall Risk Factor Calculated Maximum Acceptable Overall Risk Factor

Indure, New Delhi

For Ab < 100m2

=

LIGHTNING PROTECTION CALCULATION ( REFERENCE : IS 2309 ) FOR

= 0.009996 Times per year

Collection Area ( Refer Clause 8.1.2 of IS 2309 )

P

Overall Multiplying

Factor x P

Description / Parameter

A) CHECK FOR NEED OF PROVIDING LIGHTNING PROTECTION

Ac

Symbol / Formulae /

ReferencesValue Unit

=(L x W) + 2 (L x H) +

2(W x H) + 3.14 H2= 1999.25

Prepared

1x250MW SURATGARH S.T.P.S. Unit-6 (Stage-IV)

RRVUNL

DCPL, New Delhi

( Refer Clause 8.1.2 of

( Refer the Relevant Layout

Drawings of the Building /

Structure )

( Refer Fig. 1 of IS 2309 )

RK

Meter2

CW TREATMENT AREA

REVISION

DETAILS

3VYN855200

RemarksFirst Submission

5/21/2018 99077475 SV POWER Lightning Protection Calculation Sheet T G Building

4/11

PROJECT : -

CLIENT :-

CONSULTANT :-

BOP CONTRACTOR :-

i) Input Data :-a) Dimensions of Building / Structure

Length of the Building L = 33.30 m

Width of the Building W = 8.60 m

Height of the Building H = 10.70 m

b) Lightning Flash Density & Weighing FactorsNumber of Thunderstorm Days / Year N = 27 No. of Days / Year

Li htnin Flash Densit (Flashes to Ground /km2/ ear) Ng = 5 Nos./km

2/ ear

Weighting Factor A ( Use of Structure ) A ( Refer Table 1A of IS 2309 ) = 1

Weighting Factor B ( Type of Construction ) B ( Refer Table 1B of IS 2309 ) = 0.2

Weighting Factor C ( Content of Consequential Effects ) C ( Refer Table 1C of IS 2309 ) = 1

Weighting Factor D ( Degree of Isolation ) D ( Refer Table 1D of IS 2309 ) = 0.4

Weighting Factor E ( Type of Country ) E ( Refer Table 1E of IS 2309 ) = 0.3

ii) Calculations :-

Overall Multiplying Factor = AxBxCxDxE = 0.024000

= 0.000185

ie 1.8510E-04

iii) Maximum Acceptable Overall Risk Factor:-

= 0.000001ie 1.000E-06

iv) Result / Conclusion :-

>

Calculations (As per Clause 12.2.3 of IS-2309):-

Base Area of Structure Ab = = 286.38 Meter2Perimeter of Structure P = = 83.8 Meter

i) For Base Area (Ab) < 100m2

a) Number of Down Conductors Required = = 1 Nos

ii) For Base Area (Ab) > 100m2

b) Based on Base Area of Structure:-

= = 2 Nos

c) Based on Parimeter of Structure:-

= = 3 Nos.

Hence, Required Number of Down Conductors = 2 Nos.

Rev. Date Drg/Doc. No. Reviewed ApprovedR0 30.06.2009 PS PAS

REVISION

DETAILS

3VYN855200

RemarksFirst Submission

Prepared

1x250MW SURATGARH S.T.P.S. Unit-6 (Stage-IV)

RRVUNL

DCPL, New Delhi

( Refer Clause 8.1.2 of

( Refer the Relevant Layout

Drawings of the Building /

Structure )

( Refer Fig. 1 of IS 2309 )

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

2(W x H) + 3.14 H2= 1542.54

RK

RAW WATER PUMP HOUSE

Meter2

Description / Parameter

A) CHECK FOR NEED OF PROVIDING LIGHTNING PROTECTION

Ac

Symbol / Formulae /

ReferencesValue Unit

=

Indure, New Delhi

For Ab < 100m2

=

LIGHTNING PROTECTION CALCULATION ( REFERENCE : IS 2309 ) FOR

= 0.007713 Times per year

Collection Area ( Refer Clause 8.1.2 of IS 2309 )

P

Overall Multiplying

Factor x POverall Risk Factor Calculated

( L x W )2(L+W)

Since Overall Risk Factor Calculated Maximum Acceptable Overall Risk Factor

P/30

B) CHECK FOR ADEQUACY OF NUMBER OF DOWN CONDUCTORS

Number of Down Conductors Required

Number of Down Conductors Required 1+(Ab-100)/300

= Ac x Ng x 10-6

times/yearProbable Number of Strikes to Building / Structure per Year (

Refer Clause 8.1.2 of IS 2309 )

Note:- The Number of Down Conductor should be at least the smaller between b) & c) (as per clause 12.2.3b of IS-2309)

Rf-C

Rf-AMaximum Acceptable Overall Risk Factor( Refer Clauses 8.1.3 &

8.1.6 of IS 2309 )

Hence, Lightning Protection is Required.

5/21/2018 99077475 SV POWER Lightning Protection Calculation Sheet T G Building

5/11

PROJECT : -

CLIENT :-

CONSULTANT :-

BOP CONTRACTOR :-

i) Input Data :-a) Dimensions of Building / Structure

Length of the Building L = 22.80 m

Width of the Building W = 9.81 m

Height of the Building H = 5.00 m

b) Lightning Flash Density & Weighing Factors

Number of Thunderstorm Days / Year N = 27 No. of Days / Year

Lightning Flash Density (Flashes to Ground /km2/year) Ng = 5 Nos./km

2/year

Weighting Factor A ( Use of Structure ) A ( Refer Table 1A of IS 2309 ) = 1

Weighting Factor B ( Type of Construction ) B ( Refer Table 1B of IS 2309 ) = 0.2

Weighting Factor C ( Content of Consequential Effects ) C ( Refer Table 1C of IS 2309 ) = 1

Weighting Factor D ( Degree of Isolation ) D ( Refer Table 1D of IS 2309 ) = 0.4

Weighting Factor E ( Type of Country ) E ( Refer Table 1E of IS 2309 ) = 0.3

ii) Calculations :-

Overall Multiplying Factor = AxBxCxDxE = 0.024000

= 0.000075

ie 7.5392E-05

iii) Maximum Acceptable Overall Risk Factor:-

= 0.000001

ie 1.000E-06

iv) Result / Conclusion :-

>

Calculations (As per Clause 12.2.3 of IS-2309):-Base Area of Structure Ab = = 223.67 Meter2

Perimeter of Structure P = = 65.22 Meter

i) For Base Area (Ab) < 100m2

a) Number of Down Conductors Required = = 1 Nos

ii) For Base Area (Ab) > 100m2

b) Based on Base Area of Structure:-

= = 1 Nos

c) Based on Parimeter of Structure:-

= = 2 Nos.

Hence, Required Number of Down Conductors = 1 Nos.

Rev. Date Drg/Doc. No. Reviewed Approved

R0 30.06.2009 PS PAS

= Ac x Ng x 10-6

times/yearProbable Number of Strikes to Building / Structure per Year (

Refer Clause 8.1.2 of IS 2309 )

Note:- The Number of Down Conductor should be at least the smaller between b) & c) (as per clause 12.2.3b of IS-2309)

Rf-C

Rf-AMaximum Acceptable Overall Risk Factor( Refer Clauses 8.1.3 &

8.1.6 of IS 2309 )

Hence, Lightning Protection is Required.

P/30

B) CHECK FOR ADEQUACY OF NUMBER OF DOWN CONDUCTORS

Number of Down Conductors Required

Number of Down Conductors Required 1+(Ab-100)/300

Overall Risk Factor Calculated

( L x W )

2(L+W)

Since Overall Risk Factor Calculated Maximum Acceptable Overall Risk Factor

Indure, New Delhi

For Ab < 100m2

=

LIGHTNING PROTECTION CALCULATION ( Reference : IS 2309 ) for

= 0.003141 Times per year

Collection Area ( Refer Clause 8.1.2 of IS 2309 )

P

Overall Multiplying Factor

x P

Description / Parameter

A) CHECK FOR NEED OF PROVIDING LIGHTNING PROTECTION

Ac

Symbol / Formulae / References Value Unit

=

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

2(W x H) + 3.14 H2= 628.27

Prepared

1x250MW SURATGARH S.T.P.S. Unit-6 (Stage-IV)

RRVUNL

DCPL, New Delhi

(Refer Clause 8.1.2 of IS 2309)

( Refer the Relevant Layout

Drawings of the Building /

Structure )

( Refer Fig. 1 of IS 2309 )

RK

Meter2

RWPH MCC Room

REVISION

DETAILS

3VYN855200

Remarks

First Submission

5/21/2018 99077475 SV POWER Lightning Protection Calculation Sheet T G Building

6/11

PROJECT : -

CLIENT :-

CONSULTANT :-

BOP CONTRACTOR :-

LIGHTNING PROTECTION CALCULATION ( REFERENCE : IS 2309 ) FOR PRIMARY CRUSHER HOUSE

i) Input Data :-a) Dimensions of Building / Structure

Length of the Building L = 23.00 m

Width of the Building W = 21.50 m

Height of the Building H = 21.70 m

b) Lightning Flash Density & Weighing FactorsNumber of Thunderstorm Days / Year N = 27 No. of Days / Year

Lightning Flash Density (Flashes to Ground /km2/year) Ng = 5 Nos./km

2/year

Weighting Factor A ( Use of Structure ) A ( Refer Table 1A of IS 2309 ) = 1

Weighting Factor B ( Type of Construction ) B ( Refer Table 1B of IS 2309 ) = 0.2

Weighting Factor C ( Content of Consequential Effects ) C ( Refer Table 1C of IS 2309 ) = 1

Weighting Factor D ( Degree of Isolation ) D ( Refer Table 1D of IS 2309 ) = 0.4

Weighting Factor E ( Type of Country ) E ( Refer Table 1E of IS 2309 ) = 0.3

ii) Calculations :-

Overall Multiplying Factor = AxBxCxDxE = 0.024000

= 0.000469

ie 4.6853E-04

iii) Maximum Acceptable Overall Risk Factor:-

= 0.000001

ie 1.000E-06

iv) Result / Conclusion :-

>

Calculations (As per Clause 12.2.3 of IS-2309):-

Base Area of Structure Ab = = 494.50 Meter2

Perimeter of Structure P = = 89 Meter

i) For Base Area (Ab) < 100m2

a) Number of Down Conductors Required = = 1 Nos

ii) For Base Area (Ab) > 100m2

b) Based on Base Area of Structure:-

= = 2 Nos

c) Based on Parimeter of Structure:-

= = 3 Nos.

Hence, Required Number of Down Conductors = 2 Nos.

Rev. Date Drg/Doc. No. Reviewed ApprovedR0 30.06.2009 PS PAS

REVISION

DETAILS

3VYN855200

Remarks

First Submission

Prepared

1x250MW SURATGARH S.T.P.S. Unit-6 (Stage-IV)

RRVUNL

DCPL, New Delhi

(Refer Clause 8.1.2 of IS 2309)

( Refer the Relevant Layout

Drawings of the Building /

Structure )

( Refer Fig. 1 of IS 2309 )

Indure, New Delhi

RK

Description / Parameter

A) CHECK FOR NEED OF PROVIDING LIGHTNING PROTECTION

Ac

Symbol / Formulae / References Value Unit

=(L x W) + 2 (L x H) +

2(W x H) + 3.14 H2

Times per year

Collection Area ( Refer Clause 8.1.2 of IS 2309 )

P

Meter

2= 3904.39

= 0.019522

Overall Risk Factor Calculated

( L x W )

= Ac x Ng x 10-6

times/yearProbable Number of Strikes to Building / Structure per Year (

Refer Clause 8.1.2 of IS 2309 )

=Overall Multiplying Factor

x P

P/30

B) CHECK FOR ADEQUACY OF NUMBER OF DOWN CONDUCTORS

Number of Down Conductors Required

Number of Down Conductors Required 1+(Ab-100)/300

For Ab < 100m2

Note:- The Number of Down Conductor should be at least the smaller between b) & c) (as per clause 12.2.3b of IS-2309)

Rf-C

Rf-AMaximum Acceptable Overall Risk Factor( Refer Clauses 8.1.3 &

8.1.6 of IS 2309 )

Hence, Lightning Protection is Required.

2(L+W)

Since Overall Risk Factor Calculated Maximum Acceptable Overall Risk Factor

5/21/2018 99077475 SV POWER Lightning Protection Calculation Sheet T G Building

7/11

5/21/2018 99077475 SV POWER Lightning Protection Calculation Sheet T G Building

8/11

PROJECT : -

CLIENT :-

CONSULTANT :-

BOP CONTRACTOR :-

LIGHTNING PROTECTION CALCULATION ( REFERENCE : IS 2309 ) FOR SECONDARY CRUSHER HOUSE

i) Input Data :-a) Dimensions of Building / Structure

Length of the Building L = 38.00 m

Width of the Building W = 17.40 m

Height of the Building H = 24.20 m

b) Lightning Flash Density & Weighing Factors

Number of Thunderstorm Days / Year N = 27 No. of Days / Year

Lightning Flash Density (Flashes to Ground /km2/year) Ng = 5 Nos./km

2/year

Weighting Factor A ( Use of Structure ) A ( Refer Table 1A of IS 2309 ) = 1

Weighting Factor B ( Type of Construction ) B ( Refer Table 1B of IS 2309 ) = 0.2

Weighting Factor C ( Content of Consequential Effects ) C ( Refer Table 1C of IS 2309 ) = 1

Weighting Factor D ( Degree of Isolation ) D ( Refer Table 1D of IS 2309 ) = 0.4

Weighting Factor E ( Type of Country ) E ( Refer Table 1E of IS 2309 ) = 0.3

ii) Calculations :-

Overall Multiplying Factor = AxBxCxDxE = 0.024000

= 0.000622

ie 6.2178E-04

iii) Maximum Acceptable Overall Risk Factor:-

= 0.000001

ie 1.000E-06

iv) Result / Conclusion :-

>

Calculations (As per Clause 12.2.3 of IS-2309):-Base Area of Structure Ab = = 661.20 Meter

2

Perimeter of Structure P = = 110.8 Meter

i) For Base Area (Ab) < 100m2

a) Number of Down Conductors Required = = 1 Nos

ii) For Base Area (Ab) > 100m2

b) Based on Base Area of Structure:-

= = 3 Nos

c) Based on Parimeter of Structure:-

= = 4 Nos.

Hence, Required Number of Down Conductors = 3 Nos.

Rev. Date Drg/Doc. No. Reviewed Approved

R0 30.06.2009 PS PAS

Since Overall Risk Factor Calculated

Overall Multiplying Factor

x P

P/30

B) CHECK FOR ADEQUACY OF NUMBER OF DOWN CONDUCTORS

Number of Down Conductors Required

Maximum Acceptable Overall Risk Factor( Refer Clauses 8.1.3 &

8.1.6 of IS 2309 )

Hence, Lightning Protection is Required.

Number of Down Conductors Required 1+(Ab-100)/300

(Refer Clause 8.1.2 of IS 2309)

0.025907 Times per year=Probable Number of Strikes to Building / Structure per Year (

Refer Clause 8.1.2 of IS 2309 )

For Ab < 100m2

=

( L x W )

2(L+W)

Maximum Acceptable Overall Risk Factor

Rf-C

Description / Parameter

A) CHECK FOR NEED OF PROVIDING LIGHTNING PROTECTION

Ac

Symbol / Formulae / References Value Unit

Collection Area ( Refer Clause 8.1.2 of IS 2309 ) 5181.47 Meter2

1x250MW SURATGARH S.T.P.S. Unit-6 (Stage-IV)

RRVUNL

DCPL, New Delhi

Indure, New Delhi

Overall Risk Factor Calculated

P = Ac x Ng x 10-6

times/year

Note:- The Number of Down Conductor should be at least the smaller between b) & c) (as per clause 12.2.3b of IS-2309)

Rf-A

REVISION

DETAILS

3VYN855200

Remarks

First Submission

( Refer the Relevant Layout

Drawings of the Building /

Structure )

( Refer Fig. 1 of IS 2309 )

RK

Prepared

=

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

2(W x H) + 3.14 H2=

5/21/2018 99077475 SV POWER Lightning Protection Calculation Sheet T G Building

9/11

PROJECT : -

CLIENT :-

CONSULTANT :-

BOP CONTRACTOR :-

i) Input Data :-a) Dimensions of Building / Structure

Length of the Building L = 41.00 m

Width of the Building W = 18.00 m

Height of the Building H = 19.00 m

b) Lightning Flash Density & Weighing FactorsNumber of Thunderstorm Days / Year N = 27 No. of Days / Year

Lightning Flash Density (Flashes to Ground /km2/year) Ng = 5 Nos./km

2/year

Weighting Factor A ( Use of Structure ) A ( Refer Table 1A of IS 2309 ) = 1

Weighting Factor B ( Type of Construction ) B ( Refer Table 1B of IS 2309 ) = 0.8

Weighting Factor C ( Content of Consequential Effects ) C ( Refer Table 1C of IS 2309 ) = 1

Weighting Factor D ( Degree of Isolation ) D ( Refer Table 1D of IS 2309 ) = 0.4

Weighting Factor E ( Type of Country ) E ( Refer Table 1E of IS 2309 ) = 0.3

ii) Calculations :-

Overall Multiplying Factor = AxBxCxDxE = 0.096000

= 0.001974

ie 1.9745E-03

iii) Maximum Acceptable Overall Risk Factor:-

= 0.000001ie 1.000E-06

iv) Result / Conclusion :-

>

Calculations (As per Clause 12.2.3 of IS-2309):-

Base Area of Structure Ab = = 738.00 Meter2

Perimeter of Structure P = = 118 Meter

i) For Base Area (Ab) < 100m2

a) Number of Down Conductors Required = = 1 Nos

ii) For Base Area (Ab) > 100m2

b) Based on Base Area of Structure:-

= = 3 Nos

c) Based on Parimeter of Structure:-

= = 4 Nos.

Hence, Required Number of Down Conductors = 3 Nos.

Rev. Date Drg/Doc. No. Reviewed ApprovedR0 30.06.2009 PS PAS

REVISION

DETAILS

3VYN855200

RemarksFirst Submission

Prepared

1x250MW SURATGARH S.T.P.S. Unit-6 (Stage-IV)

RRVUNL

DCPL, New Delhi

(Refer Clause 8.1.2 of IS 2309)

( Refer the Relevant Layout

Drawings of the Building /

Structure )

( Refer Fig. 1 of IS 2309 )

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

2(W x H) + 3.14 H2= 4113.54

RK

WAGON TIPPLER AREA

Meter

2

Description / Parameter

A) CHECK FOR NEED OF PROVIDING LIGHTNING PROTECTION

Ac

Symbol / Formulae / References Value Unit

=

Indure, New Delhi

For Ab < 100m2

=

LIGHTNING PROTECTION CALCULATION ( REFERENCE : IS 2309 ) FOR

= 0.020568 Times per year

Collection Area ( Refer Clause 8.1.2 of IS 2309 )

P

Overall Multiplying Factor

x POverall Risk Factor Calculated

( L x W )

2(L+W)

Since Overall Risk Factor Calculated Maximum Acceptable Overall Risk Factor

P/30

B) CHECK FOR ADEQUACY OF NUMBER OF DOWN CONDUCTORS

Number of Down Conductors Required

Number of Down Conductors Required 1+(Ab-100)/300

= Ac x Ng x 10-6

times/yearProbable Number of Strikes to Building / Structure per Year (

Refer Clause 8.1.2 of IS 2309 )

Note:- The Number of Down Conductor should be at least the smaller between b) & c) (as per clause 12.2.3b of IS-2309)

Rf-C

Rf-AMaximum Acceptable Overall Risk Factor( Refer Clauses 8.1.3 &

8.1.6 of IS 2309 )

Hence, Lightning Protection is Required.

5/21/2018 99077475 SV POWER Lightning Protection Calculation Sheet T G Building

10/11

5/21/2018 99077475 SV POWER Lightning Protection Calculation Sheet T G Building

11/11

PROJECT : -

CLIENT :-

CONSULTANT :-

BOP CONTRACTOR :-

i) Input Data :-a) Dimensions of Building / Structure

Length of the Building L = 15.50 m

Width of the Building W = 8.50 m

Height of the Building H = 5.00 m

b) Lightning Flash Density & Weighing Factors

Number of Thunderstorm Days / Year N = 27 No. of Days / Year

Lightning Flash Density (Flashes to Ground /km2/year) Ng = 5 Nos./km

2/year

Weighting Factor A ( Use of Structure ) A ( Refer Table 1A of IS 2309 ) = 1

Weighting Factor B ( Type of Construction ) B ( Refer Table 1B of IS 2309 ) = 0.2

Weighting Factor C ( Content of Consequential Effects ) C ( Refer Table 1C of IS 2309 ) = 1

Weighting Factor D ( Degree of Isolation ) D ( Refer Table 1D of IS 2309 ) = 0.4

Weighting Factor E ( Type of Country ) E ( Refer Table 1E of IS 2309 ) = 0.3

ii) Calculations :-

Overall Multiplying Factor = AxBxCxDxE = 0.024000

= 0.000054

ie 5.4030E-05

iii) Maximum Acceptable Overall Risk Factor:-

= 0.000001

ie 1.000E-06

iv) Result / Conclusion :-

>

Calculations (As per Clause 12.2.3 of IS-2309):-Base Area of Structure Ab = = 131.75 Meter2

Perimeter of Structure P = = 48 Meter

i) For Base Area (Ab) < 100m2

a) Number of Down Conductors Required = = 1 Nos

ii) For Base Area (Ab) > 100m2

b) Based on Base Area of Structure:-

= = 1 Nos

c) Based on Parimeter of Structure:-

= = 2 Nos.

Hence, Required Number of Down Conductors = 1 Nos.

Rev. Date Drg/Doc. No. Reviewed Approved

R0 30.06.2009 PS PAS

REVISION

DETAILS

3VYN855200

Remarks

First Submission

Prepared

1x250MW SURATGARH S.T.P.S. Unit-6 (Stage-IV)

RRVUNL

DCPL, New Delhi

(Refer Clause 8.1.2 of IS 2309)

( Refer the Relevant Layout

Drawings of the Building /

Structure )

( Refer Fig. 1 of IS 2309 )

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

2(W x H) + 3.14 H2= 450.25

RK

FOR DRIVE HOUSE

Meter2

Description / Parameter

A) CHECK FOR NEED OF PROVIDING LIGHTNING PROTECTION

Ac

Symbol / Formulae / References Value Unit

=

Indure, New Delhi

For Ab < 100m2

=

LIGHTNING PROTECTION CALCULATION ( REFERENCE : IS 2309 )

= 0.002251 Times per year

Collection Area ( Refer Clause 8.1.2 of IS 2309 )

P

Overall Multiplying Factor

x POverall Risk Factor Calculated

( L x W )

2(L+W)

Since Overall Risk Factor Calculated Maximum Acceptable Overall Risk Factor

P/30

B) CHECK FOR ADEQUACY OF NUMBER OF DOWN CONDUCTORS

Number of Down Conductors Required

Number of Down Conductors Required 1+(Ab-100)/300

= Ac x Ng x 10-6

times/yearProbable Number of Strikes to Building / Structure per Year (

Refer Clause 8.1.2 of IS 2309 )

Note:- The Number of Down Conductor should be at least the smaller between b) & c) (as per clause 12.2.3b of IS-2309)

Rf-C

Rf-AMaximum Acceptable Overall Risk Factor( Refer Clauses 8.1.3 &

8.1.6 of IS 2309 )

Hence, Lightning Protection is Required.