INDEX

THIS SHEET IS ONLY FOR INTERNAL USE "DO NOT ATTACH WITH DOCUMENT"

SHEET # PAGE
1 Cover sheet
2 Record of Revision
3 Project details
4 Objective and Scope
5 Statutory Codes & standards
6 Site Climatic conditions
7 General power supply conditions
8 Universal parameters of Contract
9 List of Vendor drawings & documents
10 Technical Specifications-Equipment Specific
11 List of Attachments
12 Special Notes
 DOCUMENT NO. : 2M0042 - 7402 - BE - 1006
REVISION : 0
REV DATE: 21st June 2018

LIGHTNING CALCULATION

PROJECT NAME 1 x 10.85 MW WHRB at Morak, Rajasthan

JOB NUMBER 2M.0042

OWNER Mangalam Cement Limited, Kolkata

OWNER'S
-
CONSULTANT

MAIN CONTRACTOR thyssenkrupp INDUSTRIES INDIA

 DOCUMENT STATUS RELEASED FOR APPROVAL

CREATED BY CHECKED BY APPROVED BY

JAB JAB/CVM SCS

DATE: 21.06.2018 DATE: 21.06.2018 DATE: 21.06.2018

DOCUMENT REVISION HISTORY

REVISION DATE DETAILS SIGN SIGN
0 21.06.2018 FIRST SUBMISSION FOR APPROVAL JAB JAB
 PROJECT DETAILS
TKII'S DRG # CONTACTOR'S DRG # OWNER'S DRG #
2M0042 - 7402 - BE - 1006 - 0
REVISION NO. 0 DATE 21st June 2018

PROJECT NAME 1 x 10.85 MW WHRB

LOCATION MORAK, RAJASTHAN
PACKAGE WHRB POWER PLANT

BRIEF DESCRIPTION OF PROJECT

IT IS A WASTE HEAT RECOVERY POWER PLANT WITH 2 NOS. AQC BOILERS & 2
NOS. PH BOILERS.

4 OF 75
5 OF 75
 OBJECTIVE AND SCOPE
TKII'S DRG # CONTACTOR'S DRG # OWNER'S DRG #
2M0042 - 7402 - BE - 1006 - 0
REVISION NO. 0 DATE 21st June 2018

OBJECTIVE
The objective of this document is to encompass the typical design calculations for
earthing system envisaged for Urea product handling system

SCOPE
Following areas are covered under typical design calcualtions

AQC-1 & 2 BOILERS, PH-1 & 2 BOILERS, STG BUILDING, COOLING TOWER

6 OF 75
7 OF 75
s to encompass the typical design calculations for

H-1 & 2 BOILERS, STG BUILDING, COOLING TOWER

8 OF 75
 LIGHTNING PROTECTION SIZING CALC
TKII'S DRG #
2M0042 - 7402 - BE - 1006
REVISION NO. 0 DATE 21st June 2018

LIGHTNING PROTECTION CALCULATIONS

1] DESIGN BASIS -

1. Lightning system shall be designed as per IS/IEC 62305:2010.

2. Lighting Risk factor which is basis for providing protection is evaluated for the buildings a
below given list

AREA Height, Length, Width, M

STG Building 18.5 36 25
Cooling tower 21 39.8 14.5
PH-1 Boiler 58 10.9 6.4
PH-2 Boiler 46.1 12.5 8.7
AQC-1 Boiler 31.5 20.2 8.8
AQC-2 Boiler 32.2 21.2 7.3

3. Self-conducting structures may not be provided with aerial rods and down conductors.
They shall be connected to the earthing system at minimum two points of the base.

4. The acceptable level of tolerable risk RT considered design of Lightning Protection is 10 -5

worst risk level factor for loss of human life or permanent injuries.

5. Since, PH Boiler is below the tallest structure in the plant i.e. Preheater next to it
PH Boiler structures will be protected from existing Cement Plant Lightning
arrester on Preheater.
Considering this, Lightning Protection is considered for STG Building and AQC Boilers.

6. In this calculation, Lighting calculation for STG Buidlign is considered since, STG Building
being comparatively biggest buidling.

7. Below is Summary of Lightning Arresters Qty envisaged for supply as per calculation

AREA Qty
STG Building 2
PH Boiler-1 0
PH Boiler-2 0
AQC Boiler-1 2
AQC Boiler-2 2
Cooling Tower 2
Total 8

9 OF 75
10 OF 75
HTNING PROTECTION SIZING CALC

21st June 2018

is basis for providing protection is evaluated for the buildings as per

s may not be provided with aerial rods and down conductors.

d to the earthing system at minimum two points of the base.

lerable risk RT considered design of Lightning Protection is 10 -5 which is

he tallest structure in the plant i.e. Preheater next to it

be protected from existing Cement Plant Lightning

ng Protection is considered for STG Building and AQC Boilers.

g calculation for STG Buidlign is considered since, STG Building

ghtning Arresters Qty envisaged for supply as per calculation: -

11 OF 75
12 OF 75
 LIST OF ATTACHMENTS
TKII'S DRG # CONTACTOR'S DRG # OWNER'S DRG #
0 0 0
REVISION NO. 0 DATE 0

LIST OF ATTACHMENTS TO THIS DOCUMENT

SR# DOCUMENT NO. DESCRIPTION

1
2
3
4
5
6
7 -

NOTE:

13 OF 75
Attachments given in above table shall be considered as part of this document

14 OF 75
 LIGHTNING PROTECTION SIZING CALC
TKII'S DRG #
2M0042 - 7402 - BE - 1006
REVISION NO. 0 DATE 21st June 2018

2] Lightning Protection Calculations

As per IS/IEC 60305:2010, for this building Loss of human life (L1) and economic loss (L4) are
relevant for this type of structure.

It is required to evaluate the need for protection. This implies the need to determine the risk R1
for loss of human life (L1) with the risk components R A, RB, RU Aand RV and to compare it with th
tolerable risk RT = 10-5 (according to Table 4). The tolerable risk RT for economic loss is 10 -3.
Considering this, the suitable protection measures to mitigate human life risk will inturn mitigat
economical loss as well.

Data For The Building Considered And Surrounding

Input Parameter Comment Symbol Value Reference

Thunderstorm Days At Kota TD 27 Old IS 2309
Ground flash density (1/km2/yr) NG 2.7
Structure dimensions (m) STG Building L 36
W 25
H 18.5
Location factor of structure Higher object CD 0.25 Table A.1
LPS Metalic Structure PB 0.001 Table B.2
Equipotential bonding None PEB 1 Table B.7
External spatial shield LPS IV-20x20m KS1 2.4 Eq. B.5

Data for incomming Power lines & their internal systems connected

Input Parameter Comment Symbol Value Reference

Length (m) LL 150 Avg route length
Installation Factor Aerial Cl 1 Table A.2
Line type factor LV Power CT 1 Table A.3
Enviornmental factor Rural CE 1 Table A.4
Shield of Line RS 1 Table B.8
Shield bonded to
Sheilding, grounding, same
CLD 1 Table B.4
Isolation bonding bar of CLI
eqpt
0
Adjacent structure LJ,WJ,HJ -
Location factor of structure CDJ 0.25 Table A.1
Withstand voltage of
internal system (kV) UW 2.5
KS4 0.4 Eq. B.7
Resulting
parameters

15 OF 75
Resulting PLD
parameters 0.6 Table B.8
PLI 0.3 Table B.9

16 OF 75
 LIGHTNING PROTECTION SIZING CALC
TKII'S DRG #
2M0040-7402-BE-1006
REVISION NO. 0 DATE 21st June 2018

Factors valid for zone Z2 (inside the building)

Input Parameter Comment Symbol Value Reference

Type of floor Concrete rt 0.01 Table C.3

Protection against shock None PTA 1 Table B.1
(Flash to structure)
Protection against shock None PTU 1 Table B.6
(Flash to line)
Risk of fire Low rf 0.001 Table C.5
Fire protection Yes, manual rp 0.5 Table C.4
Internal spatial shield LPS IV-20x20m KS2 2.4 Eq. B.6
Power Internal wiring Un-shielded cable KS3 0.2 Table B.5

Coordinated SPDs None PSPD 1 Table B.3

L1: Loss of human life Special hazard:Lo hz 2 Table C.6
D1:due to touch &LT 0.01
step voltage
D2:due to physicalLF 0.02 Table C.2
damage
D3:due to failure oLo 0
internal systems
Factor for persons in zone nz/nt x tz/8760 = 5/ - 1 All persons available
8760/8760 all times worst case.
Resulting parameteLA 0.0001 Eq. C.1
LU 0.0001 Eq. C.2
LB 0.00002 Eq. C.3
LV 0.00002 Eq. C.3

Collection areas of structure and line

Symbol Result, Referen Equation

Structure AD 17348 (A.2) AD=(LxW) + (2x(3xH)x(L+W)) + πx(3xH)2

AM 846398 (A.7)
Power Lin AL/P 6000 (A.9) AL/P = 40XLL
AI/P 600000 (A.11) AM/P = 4000XLL
ADJ/P 17348 (A.2) STG with L= m, W= m, H= m

17 OF 75
18 OF 75
 LIGHTNING PROTECTION SIZING CALC
TKII'S DRG #
2M0040-7402-BE-1006
REVISION NO. 0 DATE 21st June 2018

Expected annual number of dangerous events

Symbol Result, Referen Equation

Structure ND 0.01171 (A.4) ND = NG x AD x CD x 10–6

NM 2.28528 (A.6) NM = NG x AM x 10–6
Power Lin NL/P 0.0162 (A.8) NL/P=NG X AL/P X CI x CE x CT X 10-6
NI/P 1.62 (A.10) NI/P=NG x AI/P x CI x CE x CT x 10-6
NDJ/P 0.01171 (A.5)

Determination of need of protection

The risk R1 can be expressed according to below equation -

R1 = RA + RB + RU/P + RV/P

Risk components are to be evaluated accorind to above Table.

Risk Evaluation for the un-protected structure

Type of damage Symbol Z2 Structure

D1 RA ### 1.17E-09
Injury RU = RU/P 1.7E-06 1.67E-06
D2 RB 2.3E-10 2.34E-10
Physical damage RV = RV/P 3.3E-07 3.35E-07
Total ### R1 = ###
Tolerable R1 > RT: Lightning Protection is requried.

Since risk R1 = 2.01x10-6 is LOWER than tolerable value RT = 1x10-5,

Lightning Protection for STG Building is NOT REQUIRED.

However, still a nominal protection is provided as per IS/IEC 62305 as per agreed specs.

19 OF 75
20 OF 75
 LIGHTNING PROTECTION SIZING CALC
TKII'S DRG #
2M0040-7402-BE-1006
REVISION NO. 0 DATE 21st June 2018

Risk mitigation and conclusion

Considering various factors given above, it is concluded to use of LPS of Class IV as

minimum requirement.

Below Values of rolling sphere radius, mesh size and protection angle corrosponding to th
LPS of Class - IV shall be considered as per Table-2.

Class of Rolling sphere radi Mesh size wmProtection angle

LPS r, (m (m) α0

IV ### 20 x 20 As per IS 62305:3

Fig.1

21 OF 75
22 OF 75
 LIGHTNING PROTECTION SIZING CALC
TKII'S DRG #
2M0042 - 7402 - BE - 1006
REVISION NO. 0 DATE 21st June 2018

2] Lightning Protection Calculations

As per IS/IEC 60305:2010, for this building Loss of human life (L1) and economic loss (L4) are
relevant for this type of structure.

It is required to evaluate the need for protection. This implies the need to determine the risk R1
for loss of human life (L1) with the risk components R A, RB, RU Aand RV and to compare it with the
tolerable risk RT = 10-5 (according to Table 4). The tolerable risk RT for economic loss is 10 -3.
Considering this, the suitable protection measures to mitigate human life risk will inturn mitigate
economical loss as well.

Data For The Building Considered And Surrounding

Input Parameter Comment Symbol Value Reference

Thunderstorm Days At Kota TD 27 Old IS 2309
Ground flash density (1/km2/yr) NG 2.7
Structure dimensions (m) Cooling Tower L 39.8
W 14.5
H 21
Location factor of structure Isolated CD 0.25 Table A.1
LPS Metalic Structure PB 0.001 Table B.2
Equipotential bonding None PEB 1 Table B.7
External spatial shield LPS IV-20x20m KS1 2.4 Eq. B.5

Data for incomming Power lines & their internal systems connected

Input Parameter Comment Symbol Value Reference

Length (m) LL 150 Avg route length
Installation Factor Aerial Cl 1 Table A.2
Line type factor LV Power CT 1 Table A.3
Enviornmental factor Rural CE 1 Table A.4
Shield of Line RS 1 Table B.8
Shield bonded to
Sheilding, grounding, same CLD 1 Table B.4
Isolation bonding bar of CLI 0
eqpt
Adjacent structure LJ,WJ,HJ -
Location factor of structure CDJ 0.25 Table A.1
Withstand voltage of
internal system (kV) UW 2.5
KS4 0.4 Eq. B.7
Resulting PLD
parameters 0.6 Table B.8
Resulting
parameters
PLI 0.3 Table B.9
 LIGHTNING PROTECTION SIZING CALC
TKII'S DRG #
2M0042 - 7402 - BE - 1006
REVISION NO. 0 DATE 21st June 2018

Factors valid for zone Z2 (inside the building)

Input Parameter Comment Symbol Value Reference

Type of floor Concrete rt 0.01 Table C.3

Protection against shock None PTA 1 Table B.1
(Flash to structure)
Protection against shock None PTU 1 Table B.6
(Flash to line)
Risk of fire Low rf 0.001 Table C.5
Fire protection Nil rp 1 Table C.4
Internal spatial shield LPS IV-20x20m KS2 2.4 Eq. B.6
Power Internal wiring Un-shielded cable KS3 0.2 Table B.5

Coordinated SPDs None PSPD 1 Table B.3

L1: Loss of human life Special hazard:Lo hz 2 Table C.6
D1:due to touch &LT 0.01
step voltage
D2:due to physicalLF 0.02 Table C.2
damage
D3:due to failure oLo 0
internal systems
Factor for persons in zone nz/nt x tz/8760 = 5/ - 1 All persons available
8760/8760 all times worst case.
Resulting parameteLA 0.0001 Eq. C.1
LU 0.0001 Eq. C.2
LB 0.00004 Eq. C.3
LV 0.00004 Eq. C.3

Collection areas of structure and line

Symbol Result, Referen Equation

Structure AD 19888 (A.2) AD=(LxW) + (2x(3xH)x(L+W)) + πx(3xH)2

AM 839698 (A.7)
Power Lin AL/P 6000 (A.9) AL/P = 40XLL
AI/P 600000 (A.11) AM/P = 4000XLL
ADJ/P 19888 (A.2) CT with L= m, W= m, H= m
 LIGHTNING PROTECTION SIZING CALC
TKII'S DRG #
2M0042 - 7402 - BE - 1006
REVISION NO. 0 DATE 21st June 2018

Expected annual number of dangerous events

Symbol Result, Referen Equation

Structure ND 0.01342 (A.4) ND = NG x AD x CD x 10–6

NM 2.26719 (A.6) NM = NG x AM x 10–6
Power Lin NL/P 0.0162 (A.8) NL/P=NG X AL/P X CI x CE x CT X 10-6
NI/P 1.62 (A.10) NI/P=NG x AI/P x CI x CE x CT x 10-6
NDJ/P 0.01342 (A.5)

Determination of need of protection

The risk R1 can be expressed according to below equation -

R1 = RA + RB + RU/P + RV/P

Risk components are to be evaluated accorind to above Table.

Risk Evaluation for the un-protected structure

Type of damage Symbol Z2 Structure

D1 RA ### 1.34E-09
Injury RU = RU/P 1.8E-06 1.78E-06
D2 RB 5.4E-10 5.37E-10
Physical damage RV = RV/P 7.1E-07 7.11E-07
Total ### R1 = ###
Tolerable R1 > RT: Lightning Protection is requried.

Since risk R1 = 2.49x10-6 is LOWER than tolerable value RT = 1x10-5,

Lightning Protection for CT Building is NOT REQUIRED.

However, still a nominal protection is provided as per IS/IEC 62305 as per agreed specs.
 LIGHTNING PROTECTION SIZING CALC
TKII'S DRG #
2M0042 - 7402 - BE - 1006
REVISION NO. 0 DATE 21st June 2018

Risk mitigation and conclusion

Considering various factors given above, it is concluded to use of LPS of Class IV as

minimum requirement.

Below Values of rolling sphere radius, mesh size and protection angle corrosponding to the
LPS of Class - IV shall be considered as per Table-2.

Class of Rolling sphere radi Mesh size wmProtection angle

LPS r, (m (m) α0

IV ### 20 x 20 As per IS 62305:3

Fig.1
 LIGHTNING PROTECTION SIZING CALC
TKII'S DRG #
2M0042 - 7402 - BE - 1006
REVISION NO. 0 DATE 21st June 2018

2] Lightning Protection Calculations

As per IS/IEC 60305:2010, for this building Loss of human life (L1) and economic loss (L4) are
relevant for this type of structure.

It is required to evaluate the need for protection. This implies the need to determine the risk R1
for loss of human life (L1) with the risk components R A, RB, RU Aand RV and to compare it with the
tolerable risk RT = 10-5 (according to Table 4). The tolerable risk RT for economic loss is 10 -3.
Considering this, the suitable protection measures to mitigate human life risk will inturn mitigate
economical loss as well.

Data For The Building Considered And Surrounding

Input Parameter Comment Symbol Value Reference

Thunderstorm Days At Kota TD 27 Old IS 2309
Ground flash density (1/km2/yr) NG 2.7
Structure dimensions (m) PH-1 Boiler L 10.9
W 6.4
H 58
Location factor of structure Isolated CD 0.25 Table A.1
LPS Metalic Structure PB 0.001 Table B.2
Equipotential bonding None PEB 1 Table B.7
External spatial shield LPS IV-20x20m KS1 2.4 Eq. B.5

Data for incomming Power lines & their internal systems connected

Input Parameter Comment Symbol Value Reference

Length (m) LL 350 Avg route length
Installation Factor Aerial Cl 1 Table A.2
Line type factor LV Power CT 1 Table A.3
Enviornmental factor Rural CE 1 Table A.4
Shield of Line RS 1 Table B.8
Shield bonded to
Sheilding, grounding, same CLD 1 Table B.4
Isolation bonding bar of CLI 0
eqpt
Adjacent structure LJ,WJ,HJ -
Location factor of structure CDJ 0.25 Table A.1
Withstand voltage of
internal system (kV) UW 2.5
KS4 0.4 Eq. B.7
Resulting PLD
parameters 0.6 Table B.8
Resulting
parameters
PLI 0.3 Table B.9
 LIGHTNING PROTECTION SIZING CALC
TKII'S DRG #
2M0042 - 7402 - BE - 1006
REVISION NO. 0 DATE 21st June 2018

Factors valid for zone Z2 (inside the building)

Input Parameter Comment Symbol Value Reference

Type of floor Metal rt 1 Table C.3

Protection against shock Building frame us PTA 0 Table B.1
(Flash to structure) as a down comer
Protection against shock Physical PTU 0 Table B.6
(Flash to line) Restrictions
Risk of fire Low rf 0.001 Table C.5
Fire protection Yes, manual rp 0.5 Table C.4
Internal spatial shield LPS IV-20x20m KS2 2.4 Eq. B.6
Power Internal wiring Un-shielded cable KS3 0.2 Table B.5

Coordinated SPDs None PSPD 1 Table B.3

L1: Loss of human life Special hazard:Lo hz 2 Table C.6
D1:due to touch &LT 0.01
step voltage
D2:due to physicalLF 0.02 Table C.2
damage
D3:due to failure oLo 0
internal systems
Factor for persons in zone nz/nt x tz/8760 = 5/ - 1 All persons available
8760/8760 all times worst case.
Resulting parameteLA 0.01 Eq. C.1
LU 0.01 Eq. C.2
LB 0.00002 Eq. C.3
LV 0.00002 Eq. C.3

Collection areas of structure and line

Symbol Result, Referen Equation

Structure AD 101205 (A.2) AD=(LxW) + (2x(3xH)x(L+W)) + πx(3xH)2

AM 802698 (A.7)
Power Lin AL/P 14000 (A.9) AL/P = 40XLL
AI/P 1400000 (A.11) AM/P = 4000XLL
ADJ/P 101205 (A.2) PH-1 with L= m, W= m, H= m
 LIGHTNING PROTECTION SIZING CALC
TKII'S DRG #
2M0042 - 7402 - BE - 1006
REVISION NO. 0 DATE 21st June 2018

Expected annual number of dangerous events

Symbol Result, Referen Equation

Structure ND 0.06831 (A.4) ND = NG x AD x CD x 10–6

NM 2.16729 (A.6) NM = NG x AM x 10–6
Power Lin NL/P 0.0378 (A.8) NL/P=NG X AL/P X CI x CE x CT X 10-6
NI/P 3.78 (A.10) NI/P=NG x AI/P x CI x CE x CT x 10-6
NDJ/P 0.06831 (A.5)

Determination of need of protection

The risk R1 can be expressed according to below equation -

R1 = RA + RB + RU/P + RV/P

Risk components are to be evaluated accorind to above Table.

Risk Evaluation for the un-protected structure

Type of damage Symbol Z2 Structure

D1 RA 0.00E+00 ###
Injury RU = RU/P 0 0
D2 RB 1.37E-09 1.37E-09
Physical damage RV = RV/P 1.27E-06 1.27E-06
Total 1.27E-06 R1 = ###
Tolerable R1 > RT: Lightning Protection is requried.

Since risk R1 = 1.27x10-6 is LOWER than tolerable value RT = 1x10-5,

Lightning Protection for PH-1 Building is NOT REQUIRED.

However, still a nominal protection is provided as per IS/IEC 62305 as per agreed specs.
 LIGHTNING PROTECTION SIZING CALC
TKII'S DRG #
2M0042 - 7402 - BE - 1006
REVISION NO. 0 DATE 21st June 2018

Risk mitigation and conclusion

Considering various factors given above, it is concluded to use of LPS of Class IV as

minimum requirement.

Below Values of rolling sphere radius, mesh size and protection angle corrosponding to the
LPS of Class - IV shall be considered as per Table-2.

Class of Rolling sphere radi Mesh size wm Protection angle

LPS r, (m (m) α0

IV ### 20 x 20 As per IS 62305:3

Fig.1
 LIGHTNING PROTECTION SIZING CALC
TKII'S DRG #
2M0042 - 7402 - BE - 1006
REVISION NO. 0 DATE 21st June 2018

2] Lightning Protection Calculations

As per IS/IEC 60305:2010, for this building Loss of human life (L1) and economic loss (L4) are
relevant for this type of structure.

It is required to evaluate the need for protection. This implies the need to determine the risk R1
for loss of human life (L1) with the risk components R A, RB, RU Aand RV and to compare it with the
tolerable risk RT = 10-5 (according to Table 4). The tolerable risk RT for economic loss is 10 -3.
Considering this, the suitable protection measures to mitigate human life risk will inturn mitigate
economical loss as well.

Data For The Building Considered And Surrounding

Input Parameter Comment Symbol Value Reference

Thunderstorm Days At Kota TD 27 Old IS 2309
Ground flash density (1/km2/yr) NG 2.7
Structure dimensions (m) PH-2 Boiler L 12.5
W 8.7
H 46.1
Location factor of structure Isolated CD 0.25 Table A.1
LPS Metalic Structure PB 0.001 Table B.2
Equipotential bonding None PEB 1 Table B.7
External spatial shield LPS IV-20x20m KS1 2.4 Eq. B.5

Data for incomming Power lines & their internal systems connected

Input Parameter Comment Symbol Value Reference

Length (m) LL 350 Avg route length
Installation Factor Aerial Cl 1 Table A.2
Line type factor LV Power CT 1 Table A.3
Enviornmental factor Rural CE 1 Table A.4
Shield of Line RS 1 Table B.8
Shield bonded to
Sheilding, grounding, same CLD 1 Table B.4
Isolation bonding bar of CLI 0
eqpt
Adjacent structure LJ,WJ,HJ -
Location factor of structure CDJ 0.25 Table A.1
Withstand voltage of
internal system (kV) UW 2.5
KS4 0.4 Eq. B.7
Resulting PLD
parameters 0.6 Table B.8
Resulting
parameters
PLI 0.3 Table B.9
 LIGHTNING PROTECTION SIZING CALC
TKII'S DRG #
2M0042 - 7402 - BE - 1006
REVISION NO. 0 DATE 21st June 2018

Factors valid for zone Z2 (inside the building)

Input Parameter Comment Symbol Value Reference

Type of floor Metal rt 1 Table C.3

Protection against shock Building frame us PTA 0 Table B.1
(Flash to structure) as a down comer
Protection against shock Physical PTU 0 Table B.6
(Flash to line) Restrictions
Risk of fire Low rf 0.001 Table C.5
Fire protection Yes, manual rp 0.5 Table C.4
Internal spatial shield LPS IV-20x20m KS2 2.4 Eq. B.6
Power Internal wiring Un-shielded cable KS3 0.2 Table B.5

Coordinated SPDs None PSPD 1 Table B.3

L1: Loss of human life Special hazard:Lo hz 2 Table C.6
D1:due to touch &LT 0.01
step voltage
D2:due to physicalLF 0.02 Table C.2
damage
D3:due to failure oLo 0
internal systems
Factor for persons in zone nz/nt x tz/8760 = 5/ - 1 All persons available
8760/8760 all times worst case.
Resulting parameteLA 0.01 Eq. C.1
LU 0.01 Eq. C.2
LB 0.00002 Eq. C.3
LV 0.00002 Eq. C.3

Collection areas of structure and line

Symbol Result, Referen Equation

Structure AD 66062 (A.2) AD=(LxW) + (2x(3xH)x(L+W)) + πx(3xH)2

AM 806598 (A.7)
Power Lin AL/P 14000 (A.9) AL/P = 40XLL
AI/P 1400000 (A.11) AM/P = 4000XLL
ADJ/P 66062 (A.2) PH-2 with L= m, W= m, H= m
 LIGHTNING PROTECTION SIZING CALC
TKII'S DRG #
2M0042 - 7402 - BE - 1006
REVISION NO. 0 DATE 21st June 2018

Expected annual number of dangerous events

Symbol Result, Referen Equation

Structure ND 0.04459 (A.4) ND = NG x AD x CD x 10–6

NM 2.17782 (A.6) NM = NG x AM x 10–6
Power Lin NL/P 0.0378 (A.8) NL/P=NG X AL/P X CI x CE x CT X 10-6
NI/P 3.78 (A.10) NI/P=NG x AI/P x CI x CE x CT x 10-6
NDJ/P 0.04459 (A.5)

Determination of need of protection

The risk R1 can be expressed according to below equation -

R1 = RA + RB + RU/P + RV/P

Risk components are to be evaluated accorind to above Table.

Risk Evaluation for the un-protected structure

Type of damage Symbol Z2 Structure

D1 RA 0.00E+00 ###
Injury RU = RU/P 0 0
D2 RB 8.92E-10 8.92E-10
Physical damage RV = RV/P 9.89E-07 9.89E-07
Total 9.90E-07 R1 = ###
Tolerable R1 > RT: Lightning Protection is requried.

Since risk R1 = 9.9x10-7 is LOWER than tolerable value RT = 1x10-5,

Lightning Protection for PH-2 Building is NOT REQUIRED.

However, still a nominal protection is provided as per IS/IEC 62305 as per agreed specs.
 LIGHTNING PROTECTION SIZING CALC
TKII'S DRG #
2M0042 - 7402 - BE - 1006
REVISION NO. 0 DATE 21st June 2018

Risk mitigation and conclusion

Considering various factors given above, it is concluded to use of LPS of Class IV as

minimum requirement.

Below Values of rolling sphere radius, mesh size and protection angle corrosponding to the
LPS of Class - IV shall be considered as per Table-2.

Class of Rolling sphere radi Mesh size wm Protection angle

LPS r, (m (m) α0

IV ### 20 x 20 As per IS 62305:3

Fig.1
 LIGHTNING PROTECTION SIZING CALC
TKII'S DRG #
2M0042 - 7402 - BE - 1006
REVISION NO. 0 DATE 21st June 2018

2] Lightning Protection Calculations

As per IS/IEC 60305:2010, for this building Loss of human life (L1) and economic loss (L4) are
relevant for this type of structure.

It is required to evaluate the need for protection. This implies the need to determine the risk R1
for loss of human life (L1) with the risk components R A, RB, RU Aand RV and to compare it with the
tolerable risk RT = 10-5 (according to Table 4). The tolerable risk RT for economic loss is 10 -3.
Considering this, the suitable protection measures to mitigate human life risk will inturn mitigate
economical loss as well.

Data For The Building Considered And Surrounding

Input Parameter Comment Symbol Value Reference

Thunderstorm Days At Kota TD 27 Old IS 2309
Ground flash density (1/km2/yr) NG 2.7
Structure dimensions (m) AQC-1 Boiler L 20.2
W 8.8
H 31.5
Location factor of structure Isolated CD 0.25 Table A.1
LPS Metalic Structure PB 0.001 Table B.2
Equipotential bonding None PEB 1 Table B.7
External spatial shield LPS IV-20x20m KS1 2.4 Eq. B.5

Data for incomming Power lines & their internal systems connected

Input Parameter Comment Symbol Value Reference

Length (m) LL 350 Avg route length
Installation Factor Aerial Cl 1 Table A.2
Line type factor LV Power CT 1 Table A.3
Enviornmental factor Rural CE 1 Table A.4
Shield of Line RS 1 Table B.8
Shield bonded to
Sheilding, grounding, same CLD 1 Table B.4
Isolation bonding bar of CLI 0
eqpt
Adjacent structure LJ,WJ,HJ -
Location factor of structure CDJ 0.25 Table A.1
Withstand voltage of
internal system (kV) UW 2.5
KS4 0.4 Eq. B.7
Resulting PLD
parameters 0.6 Table B.8
Resulting
parameters
PLI 0.3 Table B.9
 LIGHTNING PROTECTION SIZING CALC
TKII'S DRG #
2M0042 - 7402 - BE - 1006
REVISION NO. 0 DATE 21st June 2018

Factors valid for zone Z2 (inside the building)

Input Parameter Comment Symbol Value Reference

Type of floor Metal rt 1 Table C.3

Protection against shock Building frame us PTA 0 Table B.1
(Flash to structure) as a down comer
Protection against shock Physical PTU 0 Table B.6
(Flash to line) Restrictions
Risk of fire Low rf 0.001 Table C.5
Fire protection Yes, manual rp 0.5 Table C.4
Internal spatial shield LPS IV-20x20m KS2 2.4 Eq. B.6
Power Internal wiring Un-shielded cable KS3 0.2 Table B.5

Coordinated SPDs None PSPD 1 Table B.3

L1: Loss of human life Special hazard:Lo hz 2 Table C.6
D1:due to touch &LT 0.01
step voltage
D2:due to physicalLF 0.02 Table C.2
damage
D3:due to failure oLo 0
internal systems
Factor for persons in zone nz/nt x tz/8760 = 5/ - 1 All persons available
8760/8760 all times worst case.
Resulting parameteLA 0.01 Eq. C.1
LU 0.01 Eq. C.2
LB 0.00002 Eq. C.3
LV 0.00002 Eq. C.3

Collection areas of structure and line

Symbol Result, Referen Equation

Structure AD 33714 (A.2) AD=(LxW) + (2x(3xH)x(L+W)) + πx(3xH)2

AM 814398 (A.7)
Power Lin AL/P 14000 (A.9) AL/P = 40XLL
AI/P 1400000 (A.11) AM/P = 4000XLL
ADJ/P 33714 (A.2) AQC-1 with L= m, W= m, H= m
 LIGHTNING PROTECTION SIZING CALC
TKII'S DRG #
2M0042 - 7402 - BE - 1006
REVISION NO. 0 DATE 21st June 2018

Expected annual number of dangerous events

Symbol Result, Referen Equation

Structure ND 0.02276 (A.4) ND = NG x AD x CD x 10–6

NM 2.19888 (A.6) NM = NG x AM x 10–6
Power Lin NL/P 0.0378 (A.8) NL/P=NG X AL/P X CI x CE x CT X 10-6
NI/P 3.78 (A.10) NI/P=NG x AI/P x CI x CE x CT x 10-6
NDJ/P 0.02276 (A.5)

Determination of need of protection

The risk R1 can be expressed according to below equation -

R1 = RA + RB + RU/P + RV/P

Risk components are to be evaluated accorind to above Table.

Risk Evaluation for the un-protected structure

Type of damage Symbol Z2 Structure

D1 RA 0.00E+00 ###
Injury RU = RU/P 0 0
D2 RB 4.55E-10 4.55E-10
Physical damage RV = RV/P 7.27E-07 7.27E-07
Total 7.27E-07 R1 = ###
Tolerable R1 > RT: Lightning Protection is requried.

Since risk R1 = 7.27x10-7 is LOWER than tolerable value RT = 1x10-5,

Lightning Protection for AQC-1 Building is NOT REQUIRED.

However, still a nominal protection is provided as per IS/IEC 62305 as per agreed specs.
 LIGHTNING PROTECTION SIZING CALC
TKII'S DRG #
2M0042 - 7402 - BE - 1006
REVISION NO. 0 DATE 21st June 2018

Risk mitigation and conclusion

Considering various factors given above, it is concluded to use of LPS of Class IV as

minimum requirement.

Below Values of rolling sphere radius, mesh size and protection angle corrosponding to the
LPS of Class - IV shall be considered as per Table-2.

Class of Rolling sphere radi Mesh size wm Protection angle

LPS r, (m (m) α0

IV ### 20 x 20 As per IS 62305:3

Fig.1
 LIGHTNING PROTECTION SIZING CALC
TKII'S DRG #
2M0042 - 7402 - BE - 1006
REVISION NO. 0 DATE 21st June 2018

2] Lightning Protection Calculations

As per IS/IEC 60305:2010, for this building Loss of human life (L1) and economic loss (L4) are
relevant for this type of structure.

It is required to evaluate the need for protection. This implies the need to determine the risk R1
for loss of human life (L1) with the risk components R A, RB, RU Aand RV and to compare it with the
tolerable risk RT = 10-5 (according to Table 4). The tolerable risk RT for economic loss is 10 -3.
Considering this, the suitable protection measures to mitigate human life risk will inturn mitigate
economical loss as well.

Data For The Building Considered And Surrounding

Input Parameter Comment Symbol Value Reference

Thunderstorm Days At Kota TD 27 Old IS 2309
Ground flash density (1/km2/yr) NG 2.7
Structure dimensions (m) AQC-2 Boiler L 21.2
W 7.3
H 32.2
Location factor of structure Isolated CD 0.25 Table A.1
LPS Metalic Structure PB 0.001 Table B.2
Equipotential bonding None PEB 1 Table B.7
External spatial shield LPS IV-20x20m KS1 2.4 Eq. B.5

Data for incomming Power lines & their internal systems connected

Input Parameter Comment Symbol Value Reference

Length (m) LL 350 Avg route length
Installation Factor Aerial Cl 1 Table A.2
Line type factor LV Power CT 1 Table A.3
Enviornmental factor Rural CE 1 Table A.4
Shield of Line RS 1 Table B.8
Shield bonded to
Sheilding, grounding, same CLD 1 Table B.4
Isolation bonding bar of CLI 0
eqpt
Adjacent structure LJ,WJ,HJ -
Location factor of structure CDJ 0.25 Table A.1
Withstand voltage of
internal system (kV) UW 2.5
KS4 0.4 Eq. B.7
Resulting PLD
parameters 0.6 Table B.8
Resulting
parameters
PLI 0.3 Table B.9
 LIGHTNING PROTECTION SIZING CALC
TKII'S DRG #
2M0042 - 7402 - BE - 1006
REVISION NO. 0 DATE 21st June 2018

Factors valid for zone Z2 (inside the building)

Input Parameter Comment Symbol Value Reference

Type of floor Metal rt 1 Table C.3

Protection against shock Building frame us PTA 0 Table B.1
(Flash to structure) as a down comer
Protection against shock Physical PTU 0 Table B.6
(Flash to line) Restrictions
Risk of fire Low rf 0.001 Table C.5
Fire protection Yes, manual rp 0.5 Table C.4
Internal spatial shield LPS IV-20x20m KS2 2.4 Eq. B.6
Power Internal wiring Un-shielded cable KS3 0.2 Table B.5

Coordinated SPDs None PSPD 1 Table B.3

L1: Loss of human life Special hazard:Lo hz 2 Table C.6
D1:due to touch &LT 0.01
step voltage
D2:due to physicalLF 0.02 Table C.2
damage
D3:due to failure oLo 0
internal systems
Factor for persons in zone nz/nt x tz/8760 = 5/ - 1 All persons available
8760/8760 all times worst case.
Resulting parameteLA 0.01 Eq. C.1
LU 0.01 Eq. C.2
LB 0.00002 Eq. C.3
LV 0.00002 Eq. C.3

Collection areas of structure and line

Symbol Result, Referen Equation

Structure AD 34977 (A.2) AD=(LxW) + (2x(3xH)x(L+W)) + πx(3xH)2

AM 813898 (A.7)
Power Lin AL/P 14000 (A.9) AL/P = 40XLL
AI/P 1400000 (A.11) AM/P = 4000XLL
ADJ/P 34977 (A.2) AQC-2 with L= m, W= m, H= m
 LIGHTNING PROTECTION SIZING CALC
TKII'S DRG #
2M0042 - 7402 - BE - 1006
REVISION NO. 0 DATE 21st June 2018

Expected annual number of dangerous events

Symbol Result, Referen Equation

Structure ND 0.02361 (A.4) ND = NG x AD x CD x 10–6

NM 2.19753 (A.6) NM = NG x AM x 10–6
Power Lin NL/P 0.0378 (A.8) NL/P=NG X AL/P X CI x CE x CT X 10-6
NI/P 3.78 (A.10) NI/P=NG x AI/P x CI x CE x CT x 10-6
NDJ/P 0.02361 (A.5)

Determination of need of protection

The risk R1 can be expressed according to below equation -

R1 = RA + RB + RU/P + RV/P

Risk components are to be evaluated accorind to above Table.

Risk Evaluation for the un-protected structure

Type of damage Symbol Z2 Structure

D1 RA 0.00E+00 ###
Injury RU = RU/P 0 0
D2 RB 4.72E-10 4.72E-10
Physical damage RV = RV/P 7.37E-07 7.37E-07
Total 7.37E-07 R1 = ###
Tolerable R1 > RT: Lightning Protection is requried.

Since risk R1 = 7.37x10-7 is LOWER than tolerable value RT = 1x10-5,

Lightning Protection for AQC-2 Building is NOT REQUIRED.

However, still a nominal protection is provided as per IS/IEC 62305 as per agreed specs.
 LIGHTNING PROTECTION SIZING CALC
TKII'S DRG #
2M0042 - 7402 - BE - 1006
REVISION NO. 0 DATE 21st June 2018

Risk mitigation and conclusion

Considering various factors given above, it is concluded to use of LPS of Class IV as

minimum requirement.

Below Values of rolling sphere radius, mesh size and protection angle corrosponding to the
LPS of Class - IV shall be considered as per Table-2.

Class of Rolling sphere radi Mesh size wm Protection angle

LPS r, (m (m) α0

IV ### 20 x 20 As per IS 62305:3

Fig.1
 TECHNICAL SPECIFICATIONS
TKII'S DRG #
2M0042 - 7402 - BE - 1006
REVISION NO. 0 DATE 18th June 2018

Various Reference Tables from IS/IEC 62305:2010 which are used in Calculat

62 OF 75
63 OF 75
 TECHNICAL SPECIFICATIONS
TKII'S DRG #
2M0042 - 7402 - BE - 1006
REVISION NO. 0 DATE 18th June 2018

64 OF 75
65 OF 75
 TECHNICAL SPECIFICATIONS
TKII'S DRG #
2M0042 - 7402 - BE - 1006
REVISION NO. 0 DATE 18th June 2018

66 OF 75
67 OF 75
 TECHNICAL SPECIFICATIONS
TKII'S DRG #
2M0042 - 7402 - BE - 1006
REVISION NO. 0 DATE 18th June 2018

68 OF 75
69 OF 75
 TECHNICAL SPECIFICATIONS
TKII'S DRG #
2M0042 - 7402 - BE - 1006
REVISION NO. 0 DATE 18th June 2018

70 OF 75
71 OF 75
s from IS/IEC 62305:2010 which are used in Calculation

72 OF 75
73 OF 75
74 OF 75
75 OF 75