For Houston Integrated Software Arc Flash

7/24/2019 For Houston Integrated Software Arc Flash

1/121

002-TX A PRI

TX A

SWGR

C1

C2

C3C4

M8 M10

X B PRI

005-TXD PRI

006-TX3 PRI

007-TX E PRI

TX E

BLDG 115 SERV

C10 C11

026-TX G PRI 025-MTR 25

02-TX D SEC

TX G

027-DSB 3

C13 A

L3

028-MTR 28

M 28 ! 1"2

011-TX3 SEC 012-TX3 TER

C7

013-DS SWG2

C8

020-DS SWG3

C

M3

G2

021-TX # PRI

TX6

022-DSB 2

C12

023-MTR 23

L1

M4

TX4

M25

TX C

S SWG1

C5

C6

G1

X C PRI

010-MTR 10

TX3

TRIB

M5

C14 C16

C17

C 1A 016-H2A

017-H1AS$%&''( !1

S$%&''( !2A

L

L10

G3

TXL1

C21

MCC 15APA)EL S3

TX 3W)D

SWBD 1

CB3

R3

# TX C

#5

# TX 3

B-SWBD1

LVP1

CB6

R6

R G2

CB G2

R G3

CB G3

R G1

CB G1

MCP5

#2

CB5

R5

CB2

R2

CB M8

R M8

CB M10

R M10

CB7

R7SW1

CAP !1

# 4

C13 B

LVP5

028-MTR 28 B

LVP4

M28 !3

MCP M28 !3 MCP M28 !4

M28 !4

S-M25

#-M25

LVP2 LVP3

R7 SEC

# TX G SEC

SKM Power*Tools for Windows

Electrical Power SystemsDesign and Analysis Software


2/121

002-TX A PRI

TX A

SWGR

C1

C2

C3C4

M8 M10

X B PRI

005-TXD PRI

006-TX3 PRI

007-TX E PRI

TX E

BLDG 115 SERV

C10 C11

026-TX G PRI 025-MTR 25

02-TX D SEC

TX G

027-DSB 3

C13 A

L3

028-MTR 28

M 28 ! 1"2


C7

013-DS SWG2

C8

020-DS SWG3

C

M3

G2

021-TX # PRI

TX6

022-DSB 2

C12

023-MTR 23

L1

M4

TX4

M25

TX C

S SWG1

C5

C6

G1

X C PRI

010-MTR 10

TX3

TRIB

M5

C14 C16

C17

C 1A 016-H2A

017-H1AS$%&''( !1

S$%&''( !2A

L

L10

G3

TXL1

C21

MCC 15APA)EL S3

TX 3W)D

SWBD 1

CB3

R3

# TX C

#5

# TX 3

B-SWBD1

LVP1

CB6

R6

R G2

CB G2

R G3

CB G3

R G1

CB G1

MCP5

#2

CB5

R5

CB2

R2

CB M8

R M8

CB M10

R M10

CB7

R7SW1

CAP !1

# 4

C13 B

LVP5

028-MTR 28 B

LVP4

M28 !3

MCP M28 !3 MCP M28 !4

M28 !4

S-M25

#-M25

LVP2 LVP3

R7 SEC

# TX G SEC

I introduced into my ears twoI introduced into my ears two

metal rods with rounded endsmetal rods with rounded ends

and oined them to theand oined them to the

terminals of the a!!aratus"terminals of the a!!aratus"


3/121

002-TX A PRI

TX A

SWGR

C1

C2

C3 C4M8 M10

X B PRI

005-TXD PRI

006-TX3 PRI

007-TX E PRI

TX E

BLDG 115 SERV

C10 C11

026-TX G PRI 025-MTR 25

02-TX D SEC

TX G

027-DSB 3

C13 A

L3

028-MTR 28

M 28 ! 1"2


C7

013-DS SWG2

C8

020-DS SWG3

C

M3

G2

021-TX # PRI

TX6

022-DSB 2

C12

023-MTR 23

L1

M4

TX4

M25

TX C

S SWG1

C5

C6

G1

X C PRI

010-MTR 10

TX3

TRIB

M5

C14 C16

C17

C 1A 016-H2A

017-H1AS$%&''( !1

S$%&''( !2A

L

L10

G3

TXL1

C21

MCC 15APA)EL S3

TX 3W)D

SWBD 1

CB3

R3

# TX C

#5

# TX 3

B-SWBD1

LVP1

CB6

R6

R G2

CB G2

R G3

CB G3

R G1

CB G1

MCP5

#2

CB5

R5

CB2

R2

CB M8

R M8

CB M10

R M10

CB7

R7SW1

CAP !1

# 4

C13 B

LVP5

028-MTR 28 B

LVP4

M28 !3

MCP M28 !3 MCP M28 !4

M28 !4

S-M25

#-M25

LVP2 LVP3

R7 SEC

# TX G SEC

At the moment the circuit wasAt the moment the circuit wascom!leted# I recei$ed a shoc%com!leted# I recei$ed a shoc%

in the head & and 'egan to hearin the head & and 'egan to hear

a noise &a noise &a crac%ling and 'oiling"a crac%ling and 'oiling"


4/121

002-TX A PRI

TX A

SWGR

C1

C2

C3 C4M8 M10

X B PRI

005-TXD PRI

006-TX3 PRI

007-TX E PRI

TX E

BLDG 115 SERV

C10 C11

026-TX G PRI 025-MTR 25

02-TX D SEC

TX G

027-DSB 3

C13 A

L3

028-MTR 28

M 28 ! 1"2


C7

013-DS SWG2

C8

020-DS SWG3

C

M3

G2

021-TX # PRI

TX6

022-DSB 2

C12

023-MTR 23

L1

M4

TX4

M25

TX C

S SWG1

C5

C6

G1

X C PRI

010-MTR 10

TX3

TRIB

M5

C14 C16

C17

C 1A 016-H2A

017-H1AS$%&''( !1

S$%&''( !2A

L

L10

G3

TXL1

C21

MCC 15APA)EL S3

TX 3W)D

SWBD 1

CB3

R3

# TX C

#5

# TX 3

B-SWBD1

LVP1

CB6

R6

R G2

CB G2

R G3

CB G3

R G1

CB G1

MCP5

#2

CB5

R5

CB2

R2

CB M8

R M8

CB M10

R M10

CB7

R7SW1

CAP !1

# 4

C13 B

LVP5

028-MTR 28 B

LVP4

M28 !3

MCP M28 !3 MCP M28 !4

M28 !4

S-M25

#-M25

LVP2 LVP3

R7 SEC

# TX G SEC

This disagreea'le sensation#This disagreea'le sensation#

which I feared might 'ewhich I feared might 'e

dangerous# has deterred me sodangerous# has deterred me sothat I ha$e not re!eated thethat I ha$e not re!eated the

e(!eriment"e(!eriment"


5/121

002-TX A PRI

TX A

SWGR

C1

C2

C3 C4M8 M10

X B PRI

005-TXD PRI

006-TX3 PRI

007-TX E PRI

TX E

BLDG 115 SERV

C10 C11

026-TX G PRI 025-MTR 25

02-TX D SEC

TX G

027-DSB 3

C13 A

L3

028-MTR 28

M 28 ! 1"2


C7

013-DS SWG2

C8

020-DS SWG3

C

M3

G2

021-TX # PRI

TX6

022-DSB 2

C12

023-MTR 23

L1

M4

TX4

M25

TX C

S SWG1

C5

C6

G1

X C PRI

010-MTR 10

TX3

TRIB

M5

C14 C16

C17

C 1A 016-H2A

017-H1AS$%&''( !1

S$%&''( !2A

L

L10

G3

TXL1

C21

MCC 15APA)EL S3

TX 3W)D

SWBD 1

CB3

R3

# TX C

#5

# TX 3

B-SWBD1

LVP1

CB6

R6

R G2

CB G2

R G3

CB G3

R G1

CB G1

MCP5

#2

CB5

R5

CB2

R2

CB M8

R M8

CB M10

R M10

CB7

R7SW1

CAP !1

# 4

C13 B

LVP5

028-MTR 28 B

LVP4

M28 !3

MCP M28 !3 MCP M28 !4

M28 !4

S-M25

#-M25

LVP2 LVP3

R7 SEC

# TX G SEC

AlessandroAlessandroVoltaVolta

1745 - 18271745 - 1827


6/121

Arc Flash


7/121

002-TX A PRI

TX A

SWGR

C1

C2

C3

C4M8 M10

TX B PRI

005-TXD PRI

006-TX3 PRI

007-TX E PRI

TX E

BLDG 115 SERV

C10 C11

026-TX G PRI 025-MTR 25

02-TX D SEC

TX G

027-DSB 3

C13 A

L3

028-MTR 28

M 28 ! 1"2


C7

013-DS SWG2

C8

020-DS SWG3

C

M3

G2

021-TX # PRI

TX6

022-DSB 2

C12

023-MTR 23

L1

M4

TX4

M25

TX C

S SWG1

C5

C6

G1

TX C PRI

010-MTR 10

TX3

TRIB

M5

C14 C16

C17

C 1A 016-H2A

017-H1AS$%&''( !1

S$%&''( !2A

L

L10

G3

TXL1

C21

MCC 15APA)EL S3

TX 3W)D

POWER*TOOLS FOR WINDOWS

SWBD 1

CB3

R3

# TX C

#5

# TX 3

B-SWBD1

LVP1

CB6

R6

R G2

CB G2

R G3

CB G3

R G1

CB G1

MCP5

#2

CB5

R5

CB2

R2

CB M8

R M8

CB M10

R M10

CB7

R7SW1

CAP !1

# 4

C13 B

LVP5

028-MTR 28 B

LVP4

M28 !3

MCP M28 !3 MCP M28 !4

M28 !4

S-M25

#-M25

LVP2 LVP3

R7 SEC

# TX G SEC

What is the !ur!ose of an arc flash study)

To determine the protective clothing requirements for

persons working on live equipment

Living with what one has and minimize the risks

Designing electrical safety into the power distribution

design


8/121

002-TX A PRI

TX A

SWGR

C1

C2

C3

C4M8 M10

TX B PRI

005-TXD PRI

006-TX3 PRI

007-TX E PRI

TX E

BLDG 115 SERV

C10 C11

026-TX G PRI 025-MTR 25

02-TX D SEC

TX G

027-DSB 3

C13 A

L3

028-MTR 28

M 28 ! 1"2


C7

013-DS SWG2

C8

020-DS SWG3

C

M3

G2

021-TX # PRI

TX6

022-DSB 2

C12

023-MTR 23

L1

M4

TX4

M25

TX C

S SWG1

C5

C6

G1

TX C PRI

010-MTR 10

TX3

TRIB

M5

C14 C16

C17

C 1A 016-H2A

017-H1AS$%&''( !1

S$%&''( !2A

L

L10

G3

TXL1

C21

MCC 15APA)EL S3

TX 3W)D


SWBD 1

CB3

R3

# TX C

#5

# TX 3

B-SWBD1

LVP1

CB6

R6

R G2

CB G2

R G3

CB G3

R G1

CB G1

MCP5

#2

CB5

R5

CB2

R2

CB M8

R M8

CB M10

R M10

CB7

R7SW1

CAP !1

# 4

C13 B

LVP5

028-MTR 28 B

LVP4

M28 !3

MCP M28 !3 MCP M28 !4

M28 !4

S-M25

#-M25

LVP2 LVP3

R7 SEC

# TX G SEC

Why Integrated Software

For Arc Flash valuation!


9/121

002-TX A PRI

TX A

SWGR

C1

C2

C3

C4M8 M10

TX B PRI

005-TXD PRI

006-TX3 PRI

007-TX E PRI

TX E

BLDG 115 SERV

C10 C11

026-TX G PRI 025-MTR 25

02-TX D SEC

TX G

027-DSB 3

C13 A

L3

028-MTR 28

M 28 ! 1"2


C7

013-DS SWG2

C8

020-DS SWG3

C

M3

G2

021-TX # PRI

TX6

022-DSB 2

C12

023-MTR 23

L1

M4

TX4

M25

TX C

S SWG1

C5

C6

G1

TX C PRI

010-MTR 10

TX3

TRIB

M5

C14 C16

C17

C 1A 016-H2A

017-H1AS$%&''( !1

S$%&''( !2A

L

L10

G3

TXL1

C21

MCC 15APA)EL S3

TX 3W)D


SWBD 1

CB3

R3

# TX C

#5

# TX 3

B-SWBD1

LVP1

CB6

R6

R G2

CB G2

R G3

CB G3

R G1

CB G1

MCP5

#2

CB5

R5

CB2

R2

CB M8

R M8

CB M10

R M10

CB7

R7SW1

CAP !1

# 4

C13 B

LVP5

028-MTR 28 B

LVP4

M28 !3

MCP M28 !3 MCP M28 !4

M28 !4

S-M25

#-M25

LVP2 LVP3

R7 SEC

# TX G SEC

Why Integrated Software)

"e all love #icrosoft $we own stock%!

& can't find that (F)A book to do it by hand

!

& lost my calculator!

The boss wanted the ))s yesterday!


10/121

002-TX A PRI

TX A

SWGR

C1

C2

C3

C4M8 M10

TX B PRI

005-TXD PRI

006-TX3 PRI

007-TX E PRI

TX E

BLDG 115 SERV

C10 C11

026-TX G PRI 025-MTR 25

02-TX D SEC

TX G

027-DSB 3

C13 A

L3

028-MTR 28

M 28 ! 1"2


C7

013-DS SWG2

C8

020-DS SWG3

C

M3

G2

021-TX # PRI

TX6

022-DSB 2

C12

023-MTR 23

L1

M4

TX4

M25

TX C

S SWG1

C5

C6

G1

TX C PRI

010-MTR 10

TX3

TRIB

M5

C14 C16

C17

C 1A 016-H2A

017-H1AS$%&''( !1

S$%&''( !2A

L

L10

G3

TXL1

C21

MCC 15APA)EL S3

TX 3W)D


SWBD 1

CB3

R3

# TX C

#5

# TX 3

B-SWBD1

LVP1

CB6

R6

R G2

CB G2

R G3

CB G3

R G1

CB G1

MCP5

#2

CB5

R5

CB2

R2

CB M8

R M8

CB M10

R M10

CB7

R7SW1

CAP !1

# 4

C13 B

LVP5

028-MTR 28 B

LVP4

M28 !3

MCP M28 !3 MCP M28 !4

M28 !4

S-M25

#-M25

LVP2 LVP3

R7 SEC

# TX G SEC

Why Integrated Software)

&n *eal state+ it's location

&n Arc Flash+ it isAccuracy


11/121

,tandards *elated to ,afety

(- ../0.1

(F)A 2/

& ,td0 .345

Also we have 6,7A 8

The 6ccupational 7ealth and ,afety Act and its

regulations


12/121

lectrical 7azards

Shoc%

lash +urns

+last Pressure


13/121

110.16 Flash Protection. S*+,.%/( '%/( +($,+ /,/ '

( /,/ /,/ ',' + /,.' ,. (*'+ /$+' ,., ' +9': ,/

';$+' '++ / +,'' *.+' ''+?'( .

%' &+'( 9'( ,/ * ;$+&+'( '/ /& /,',+ '',+ &. .?(@

T.' 9+ . %' /,'( / ,/ %' ': >++%' ,/ ;$+&+'( '/ %'&/'

'++ / +,'' /& ,.' ';$+',@

R'+,'( &/ )EC2002

,E-. /00/ Article 110213


14/121


15/121

#P) )/@ 1 )#PA 70E-2004 S,(( &/ E',+ S&',: + ,.' W/9'

/>+(' +,' + (','++ '>'+,: /& /,',+ '


16/121

(F)A 2/

*equirements for safe work practices

Addresses hazards9

: ,hock

: Arc Flash

*equirements forshock and arc flashboundaries

*equirements forpersonal protectiveequipment

&ncident nergyand flash boundarycalculations $;.///


17/121

(F)A 2/

19029 lash :a;ard Analysis2A flashhazard analysis shall be done in orderto protect personnel from thepossibility of being in>ured by an arcflash0 The analysis shall determine theFlash )rotection ?oundary and thepersonal protective equipment thatpeople within the Flash )rotection?oundary shall use0 *equirements forsafe work practices

,*PA50EStandardforElectrical

Safety6e7uirementsforEm!loyeeWor%!laces/008Edition


18/121

(F)A 2/$?% )rotective -lothing and )ersonal )rotective quipment for Application

with a Flash 7azard Analysis0 "here it has been determined that work

will be performed within the Flash )rotection ?oundary by .@/0@$A%+the flash hazard analysis shall determine+ and the employer shalldocument+ the incident energy eposure of the worker $in calories persquare centimeter%0 The incident energy eposure level shall be basedon the working distance of the employee's face and chest areas froma prospective arc source for the specific task to be performed0 Flame=resistant $F*% clothing and personal protective equipment $))% shall

be used by the employee based on the incident energy eposureassociated with the specific task0 *ecognizing that incident energyincreases as the distance from the arc flash decreases+ additional)) shall be used for any parts of the body that are closer than thedistance at which the incident energy was determined As analternative+ the )) requirements of .@/02$-%$B% shall be permitted tobe used in lieu of the detailed flash hazard analysis approachdescribed in .@/0@$A%0

F)(9 For information on estimating the incident energy+ seeAnne D0


19/121

& ,td .345 = C//C

Addresses Arc Flash -alculations9

Arcing Fault

&ncident energy

Flash boundary


20/121

24 inch Flash Hazard Boundary

3 cal/cm2 Flash Hazard at 18 inches

1DF PPE Leel! 1 Layer " oz #ome$%!Leather &loes Faceshield

48' ()* +hoc, Hazard -hen *oer is remoed

3" inch Limited )..roach12 inch estricted )..roach 0 '' ( *lass '' &loes

1 inch Prohiited )..roach 0 '' ( *lass '' &loes

Equipment Name:Slurry Pump Starter

)##&!)rc Flash and +hoc, Hazard

)..ro.riate PPE e5uired

-ourtesy 0&0 du )ont de (emours 8 -o0


21/121

002-TX A PRI

TX A

SWGR

C1

C2

C3

C4M8 M10

TX B PRI

005-TXD PRI

006-TX3 PRI

007-TX E PRI

TX E

BLDG 115 SERV

C10 C11

026-TX G PRI 025-MTR 25

02-TX D SEC

TX G

027-DSB 3

C13 A

L3

028-MTR 28

M 28 ! 1"2


C7

013-DS SWG2

C8

020-DS SWG3

C

M3

G2

021-TX # PRI

TX6

022-DSB 2

C12

023-MTR 23

L1

M4

TX4

M25

TX C

S SWG1

C5

C6

G1

TX C PRI

010-MTR 10

TX3

TRIB

M5

C14 C16

C17

C 1A 016-H2A

017-H1AS$%&''( !1

S$%&''( !2A

L

L10

G3

TXL1

C21

MCC 15APA)EL S3

TX 3W)D


SWBD 1

CB3

R3

# TX C

#5

# TX 3

B-SWBD1

LVP1

CB6

R6

R G2

CB G2

R G3

CB G3

R G1

CB G1

MCP5

#2

CB5

R5

CB2

R2

CB M8

R M8

CB M10

R M10

CB7

R7SW1

CAP !1

# 4

C13 B

LVP5

028-MTR 28 B

LVP4

M28 !3

MCP M28 !3 MCP M28 !4

M28 !4

S-M25

#-M25

LVP2 LVP3

R7 SEC

# TX G SEC

To do Arc lash E$aluations

,tart with an accurate one line

7ave accurate one line component

definitions

7ave accurate ,hort -ircuit potentials 7ave knowledge of the protective devices'

opening times

An accurate description of the operation And it is all %e!t u! to date


22/121

002-TX A PRI

TX A

SWGR

C1

C2

C3

C4M8 M10

TX B PRI

005-TXD PRI

006-TX3 PRI

007-TX E PRI

TX E

BLDG 115 SERV

C10 C11

026-TX G PRI 025-MTR 25

02-TX D SEC

TX G

027-DSB 3

C13 A

L3

028-MTR 28

M 28 ! 1"2


C7

013-DS SWG2

C8

020-DS SWG3

C

M3

G2

021-TX # PRI

TX6

022-DSB 2

C12

023-MTR 23

L1

M4

TX4

M25

TX C

S SWG1

C5

C6

G1

TX C PRI

010-MTR 10

TX3

TRIB

M5

C14 C16

C17

C 1A 016-H2A

017-H1AS$%&''( !1

S$%&''( !2A

L

L10

G3

TXL1

C21

MCC 15APA)EL S3

TX 3W)D


SWBD 1

CB3

R3

# TX C

#5

# TX 3

B-SWBD1

LVP1

CB6

R6

R G2

CB G2

R G3

CB G3

R G1

CB G1

MCP5

#2

CB5

R5

CB2

R2

CB M8

R M8

CB M10

R M10

CB7

R7SW1

CAP !1

# 4

C13 B

LVP5

028-MTR 28 B

LVP4

M28 !3

MCP M28 !3 MCP M28 !4

M28 !4

S-M25

#-M25

LVP2 LVP3

R7 SEC

# TX G SEC

6ole of Integrated Software

)rovide a one=line and system model of the

power system

*un studies for sizing and analysis $studies arerequired for worker safety+ protection of equipment+ and reliable

operation%


23/121

002-TX A PRI

TX A

SWGR

C1

C2

C3

C4M8 M10

TX B PRI

005-TXD PRI

006-TX3 PRI

007-TX E PRI

TX E

BLDG 115 SERV

C10 C11

026-TX G PRI 025-MTR 25

02-TX D SEC

TX G

027-DSB 3

C13 A

L3

028-MTR 28

M 28 ! 1"2


C7

013-DS SWG2

C8

020-DS SWG3

C

M3

G2

021-TX # PRI

TX6

022-DSB 2

C12

023-MTR 23

L1

M4

TX4

M25

TX C

S SWG1

C5

C6

G1

TX C PRI

010-MTR 10

TX3

TRIB

M5

C14 C16

C17

C 1A 016-H2A

017-H1AS$%&''( !1

S$%&''( !2A

L

L10

G3

TXL1

C21

MCC 15APA)EL S3

TX 3W)D


SWBD 1

CB3

R3

# TX C

#5

# TX 3

B-SWBD1

LVP1

CB6

R6

R G2

CB G2

R G3

CB G3

R G1

CB G1

MCP5

#2

CB5

R5

CB2

R2

CB M8

R M8

CB M10

R M10

CB7

R7SW1

CAP !1

# 4

C13 B

LVP5

028-MTR 28 B

LVP4

M28 !3

MCP M28 !3 MCP M28 !4

M28 !4

S-M25

#-M25

LVP2 LVP3

R7 SEC

# TX G SEC

: Load Analysisis used to verify that equipment is sizedproperly for continuous loads0

: Short Circuit Analysisis used to verify that equipment issized properly to withstand and interrupt short circuits0

: Protective Device Coordinationsets protective devices toallow normal system operation while protecting equipment

from damage and workers from in>ury0

: Harmonic Analysisis used to minimize harmonic distortionand verify the equipment is sized properly to withstandharmonic current and voltage0

: Arc Flash Hazard Analysisis used to calculate the incidentenergy released when an arcing fault occurs0

,tudies $amples%


24/121

002-TX A PRI

TX A

SWGR

C1

C2

C3

C4M8 M10

TX B PRI

005-TXD PRI

006-TX3 PRI

007-TX E PRI

TX E

BLDG 115 SERV

C10 C11

026-TX G PRI 025-MTR 25

02-TX D SEC

TX G

027-DSB 3

C13 A

L3

028-MTR 28

M 28 ! 1"2


C7

013-DS SWG2

C8

020-DS SWG3

C

M3

G2

021-TX # PRI

TX6

022-DSB 2

C12

023-MTR 23

L1

M4

TX4

M25

TX C

S SWG1

C5

C6

G1

TX C PRI

010-MTR 10

TX3

TRIB

M5

C14 C16

C17

C 1A 016-H2A

017-H1AS$%&''( !1

S$%&''( !2A

L

L10

G3

TXL1

C21

MCC 15APA)EL S3

TX 3W)D


SWBD 1

CB3

R3

# TX C

#5

# TX 3

B-SWBD1

LVP1

CB6

R6

R G2

CB G2

R G3

CB G3

R G1

CB G1

MCP5

#2

CB5

R5

CB2

R2

CB M8

R M8

CB M10

R M10

CB7

R7SW1

CAP !1

# 4

C13 B

LVP5

028-MTR 28 B

LVP4

M28 !3

MCP M28 !3 MCP M28 !4

M28 !4

S-M25

#-M25

LVP2 LVP3

R7 SEC

# TX G SEC

In reality

These studies are not always performed$"hen changes are made or about to made%

)lant operating conditions vary

Assumptions $issues% have to be made

?ut with Arc Flash today+ studies need tobe up to date


25/121

Documented )rocedures

now Fault -urrent -alculations

now ,afe Approach Distance

now Arcing Fault -learing Time

now the &ncident nergy posure -alculations

now 7azard *isk -ategory

Pre!aring to Wor% Safely

"hat do we need to know or do!


26/121

Documented )rocedures: Gob briefing $written work processes 8 procedures%

: nergized work permit




now the &ncident nergy posure

-alculations





27/121

OSHA 1910.333 (a) (1) & NFA 70! 130.1

,afe "ork )ractices

not to work HhotI or HliveI ecept whenmployer can demonstrate9

.0De=energizing introduces additional

or increased hazardsC0&nfeasible due to

equipment designor operational

limitations


28/121

(F)A 2/ = C//5

Appropriate safety=related work practices

shall be determined before any person

approaches eposed live parts within theLimited Approach ?oundary by using both

shock hazard analysis and flash hazard

analysis0


29/121

(F)A 2/ = C//5

A flash hazard analysis shall be done in order

to protect personnel from the possibility of

being in>ured by an arc flash0 The analysisshall determine the Flash )rotection

?oundary and the personal protective

equipment that people within the Flash

)rotection ?oundary shall use0


30/121

The incident energy eposure level shall be

based on the working distance of the

employee's face and chest areas from a

prospective arc source for the specific task to

be performed0

(F)A 2/

480V

MCC


31/121

(F)A 2/ = C//5

&f live parts are not placed in an electrically

safe work conditions $i0e0+ for the reasons of

increased or additional hazards or infeasibilityper .@/0.% work to be performed shall be

considered energized electrical work and

shall be performed by written permit only0


32/121



: ?olted Fault:Arcing Fault


now Arcing Fault -learing Time now the &ncident nergy posure -alculations





33/121

) B) B

Bolted+hort *ircuit

)rcin6+hort *ircuit


34/121

Test *ig for ?olted ,-


35/121

Test *ig for Arching ,-


36/121

Arcing ,hort -ircuit

Pressure Wa$es

-o!!er


37/121



now ,afe Approach Distance: Limits of approach: Flash boundary




-alculations




38/121

>imited Shoc% +oundary= ualified or Bn7ualified Persons*

* Cnly if accom!anied 'y ualified Person

Prohi'ited Shoc% +oundary= ualified Persons Cnly2 PPE as

if direct contact with li$e !art

6estricted Shoc% +oundary= ualified Persons Cnly

,ote= shoc% 'oundaries de!endent on system $oltage le$el

lash Protection +oundary P+

Must wear a!!ro!riate PPE

P+ de!endent on fault le$el and time duration2

lash Protection +oundary P+

Must wear a!!ro!riate PPE

P+ de!endent on fault le$el and time duration2

E7ui!ment


39/121

Flash ?oundary

DB

arc flash boundary (mm) at incident enery of !"# ($%cm&)

DB

' "*+ Cf,n (t%#"&) (-*#.% ,

B) /*%.

0here

,B

incident enery set !"# ($%cm&)

Cf

*"# for voltae above * 12 and

*"! for voltae at or belo0 * 12

t arcin duration in seconds

3 distance e34onent

3 ,5ui4ment 6y4e 12*"78 S0itchear 9' *

*"-* Panel 9' *

#":78 S0itchear ; *

& all others


40/121




now Arcing Fault -learing Time: Time current curves

: -oordination studies

now the &ncident nergy posure -alculations





41/121

Documented )rocedures now Fault -urrent -alculations now ,afe Approach Distance now Arcing Fault -learing Time


-alculations

: (F)A 2/ #ethod: & .345 #ethod





42/121

Anne D9 ,ample -alculation of &ncident

nergy and Flash )rotection ?oundary

.% (F)A 2/ #ethod with .//J and @4J of

?olted FaultC% & .345 mpirical method

(F)A 2/


43/121

Ese & .345 -alculations

)reliminary & .345 work used in (F)A 2/

(F)A 2/ equations limited to ; .///ured by an arc flash0 The analysisshall determine the Flash )rotection

?oundary and the personal protective

equipment that people within the Flash

)rotection ?oundary shall use0


51/121

6k+ it's required

+ut :ow)


52/121

?reak


53/121

Arc Flash -alculation ,tep *eview

: Determine ,ystem #odes of 6peration

: -alculate ?olted Fault -urrent at each ?us

: -alculate Arcing Fault -urrent at each ?us

: -alculate Arcing Fault -urrent seen by each)rotective Device

: Determine Trip Time for ach )rotective Device

based on Arcing Fault -urrent

: -alculate &ncident nergy at "orking Distance: -alculate Arc Flash ?oundary

: Determine *equired ))

)erform an Arc Flash ,tudy Analysis


54/121

?olted Fault -urrent

Fault Location

022-DSB 2

480 V

Isc 3P 20898 A

TX6

Isc 439 AIsc 16341 A

021-TX F PRI

4160 VIsc 3P 13930 A

9 Isc 43! AIsc 13"18 A

R TX F #$STI%&'()S$(-11T 1000 * " AS+ttin,s Pas+ Ta. 0/6 120A

Ti+ Dials 2/6I%ST 'i, 11/4 2280AD+init+ Ti+ 0/02

020-DS S#&34160 VIsc 3P 1!042 A

12 Isc 460" AIsc 1"2!! A

023-TR 23

480 VIsc 3P 19869 A

! 9


55/121

Arcing Fault -urrentFor bus voltae 9 * 12 and 7##A >

B

*#-1A

lo (>A) ' < = #"--& lo (>

B) = #"#:-- 2 = #"###!&- ?

= #"!!++ 2 lo (>B) @ #"##8# ? lo (>

B)

0here

lo lo*#

>A arcin fault currentK @#"*!8 for o4en confiuration and

@#"#:7 for bo3 confiuration

>B

bolted fault current @ 84hase sym rms 1A at the bus

2 bus voltae in 12

? bus bar a4 bet0een conductors in mm

For bus voltage M . k< and 2//A &

?

./1kA

lo (>A) '#"###& = #":+8 lo (>

B)

6he above e5uations are re4rinted 0ith 4ermission from >,,, *!+ ECo4yriht #&E by >,,," 6he >,,, disclaims any

res4onsibility or liability resultin from the 4lacement and use in the described manner" From >,,, *!+ Co4yriht #& >,,,"

All rihts reserved"E


56/121

&dentify nvironment

or1in Distance ?rounded % Gnrounded

,5ui4ment 6y4e4en Air

S0itchearPanel % CC

Cable

Bus Bar ?a4*!12 S0r *!&mm

!12 S0r *#mm

L2 S0r 8&mm

Panel % CC &!mm

Cable *8mm

480VMCC


57/121

There are &ssuesN


58/121

Arc Flash


59/121

Arcing Fault -lear Time

/03 . ./ .// . .//0/.

/0./

.

./

.//

.///

-E**(T &( A#)*,

tcc@0tcc *ef0


60/121

Arc Flash &ncident

54/


61/121

C/:+., IEEEU'( %: P'++/


62/121

C/:+., IEEEU'( %: P'++/


63/121

C/:+., IEEEU'( %: P'++/


64/121

C/:+., IEEEU'( %: P'++/


65/121

C/:+., IEEEU'( %: P'++/


66/121

C/:+., IEEEU'( %: P'++/


67/121

C/:+., IEEEU'( %: P'++/

& - t Li iti


68/121

&ssues : -urrent Limiting

Fuse

/03 . ./ .// . .//0/.

/0./

.

./

.//

.///

-E**(T &( A#)*,

T

&(

,-6(D,

-urrent >imiting 6ange

In -urrent >imiting 6ange

C!erates in F G -ycle

>imits -urrent from 0 to H0J

>imits More at :igher -urrents


69/121

Arc Flash &ncident

54/


70/121

C/:+., IEEEU'( %: P'++/


71/121

C/:+., IEEEU'( %: P'++/


72/121

C/:+., IEEEU'( %: P'++/


73/121

C/:+., IEEEU'( %: P'++/


74/121

C/:+., IEEE

U'( %: P'++/


75/121

C/:+., IEEE

U'( %: P'++/

&ssues -urrent Limiting


76/121

&ssues : -urrent Limiting

/03 . ./ .// . ./ .///0/.

/0./

.

./

.//

.///

-E**(T &( A#)*,

T&(

,-6(D,

FuseFuse

C// kA for /0/. seconds M C05 -alKcmOC

.// kA for /0/. seconds M C0@ -alKcmOC

3/ kA for /0/. seconds M .0C -alKcmOC

All @ values M -lass .

C// kA for /0/. seconds M C05 -alKcmOC

.// kA for /0/. seconds M C0@ -alKcmOC

3/ kA for /0/. seconds M .0C -alKcmOC

All @ values M -lass .

Ignoring -urrent?>imiting Effects

C!erates in 0201s

/28 -alcm/ at /00 %A

/29 -alcm/ at 100 %A

12/ -alcm/ at 40 %A

& F lt < l


77/121

&ssues : Fault


78/121

/03 . ./ .// . .//0/.

/0./

.

./

.//

.///

-E**(T &( A#)*,

tcc30tcc *ef0


79/121

&ssues : Long Trip Times

/03 . ./ .// .F ./F/0/.

/0./

.

./

.//

.///

-E**(T &( A#)*,

tccC0tcc *ef0


80/121

&ssues = Faster Trip Times

/03 . ./ .// .F ./F/0/.

/0./

.

./

.//

.///

-E**(T &( A#)*,

tccC0tcc *ef0


81/121

&ssues = -oordination

Coordination 6raditionally used for ,5ui4mentProtection and System Ieliability

Arc flash re5uirements brins ne0 safety focus to coordination studies

loo1in at minimum faults and settin faster tri4 times"

Faster tri4 times may cause more nuisance tri4s"Alternative 4rotection schemes may ain 4o4ularity (differential

4rotection zone interloc1in liht sensors etc")



82/121


./5/ A

TR &nrush

.C1 A#C3

F=#C3

*2 ,-

TR

/03 . ./ .// . .//0/.

/0./

.

./

.//

.///

-E**(T &( A#)*,

#trC30tcc *ef0


83/121

Coordinated

&ssues = -oordination


84/121

iscoordination


85/121

An eercise to show mis=coordination

-E**(T &( A#)*,


86/121

#is=coordination

/03 . ./ .// .F ./F/0/.

/0./

.

./

.//

.///

tcc30tcc *ef0


87/121

&n 6ptions ,creen

&ssues : )arallel -ontributions


88/121

&ssues )arallel -ontributions

30 9A S./,

C+$+, C$',

&/ U,++,:

' + 0@5 '@

#$, L/,+/

5 9A S./,

C+$+, C$',

&/ M/,/

(': + 5

:' 0@08 'F@



89/121


tility

"otor for

0.0# sec

tility only for remainin$

0.%& sec.

T+'

C$',

Ener$y Accumulation '(e)uction*

Fault on //@ 7< ,"*


90/121

Fault on //@=7< ,"*

Arc Flash -alculation on //@=7< ,"*


91/121

R7

R6

R2

R3

RM8

RM10

R6 R2

R3 RM8

RM10R2 R3

RM8

RM10

0@083 0@374 0@222

6@39A 6@46 9A 4@77 9A

R3 RM8 RM10

1@321

1@73 9A

R7 T+ R6 T+ R2 T+ R3 T+

RM8 RM10

1@321

1@45 9A

R M8 T+ R M10 T+

0@64 9A

RM10

1@321

T F

I 9AF

31@656@03 77@64 81@28 1@70 100+Arc ,urrent ,leare):

1@60 6@0 8@3 13@0 13@0 13@0-otal nci)ent Ener$y at

the fault /us'calcm&*:

1@60 4@4 2@3 4@7 0@0 0@0nci)ent Ener$y from

/ranches 'calcm&*:


92/121

?reak

&ssues Line ,ide Activities


93/121

&ssues : Line ,ide Activities

Lin+ Si5+

Loa5 Si5+

1-Bus

T1

)TIL-0001

1

ain B7

B1

1

2 3 4 "

B2 B3 B4 B"

R1


94/121

6un Arc lash -alculations

D t il


95/121

Detail


96/121

TX A

SWGR

C1

C2

C3

C4M8 M10

TX B PRI

005-TXD PRI

006-TX3 PRI

007-TX E PRI

TX E

BLDG 115 SERV

C10 C11

026-TX G PRI 025-MTR 25

02-TX D SEC

TX G

027-DSB 3

C13 A

L3

028-MTR 28

M 28 ! 1"2


C7

013-DS SWG2

C8

020-DS SWG3

C

M3

G2

021-TX # PRI

TX6

022-DSB 2

C12

023-MTR 23

L1

M4

TX4

M25

TX C

S SWG1

C5

C6

G1

TX C PRI

010-MTR 10

TX3

TRIB

M5

C14 C16

C17

C 1A 016-H2A

017-H1AS$%&''( !1

S$%&''( !2A

L

L10

G3

C21

MCC 15APA)EL S3

TX 3W)D

SWBD 1

CB3

R3

# TX C

#5

# TX 3

B-SWBD1

LVP1

CB6

R6

R G2

CB G2

R G3

CB G3

R G1

CB G1

MCP5

#2

CB5

R5

CB2

CB M8

R M8

CB M10

R M10

CB7

R7SW1

CAP !1

# 4

C13 B

LVP5

028-MTR 28 B

LVP4

M28 !3

MCP M28 !3 MCP M28 !4

M28 !4

S-M25

#-M25

LVP2 LVP3

R7 SEC

# TX G SEC

?usDetail9

?us Detail generates a detailed label

,tandard or -ustom Label9enerates standard and custom arc flash warning labels

"ork )ermit=

)roduces energized work permits based on the calculated incident energy

*e=run ,tudy9Allows one to re=run the study to display the most up to date results+ if you

have made changes in the table

6ptions Tab


97/121

or E7ui!ment F or L to /80$ ac


98/121

7 !

&n (F)A 2/+ Article .@/+ Table .@/02 $2%$B%$a% with (otes . and @ $for ;./kA short circuit

current available+ the hazard Krisk category required may be reduced by one% )ages 2/=CBthru @.0

The Table shows hazard Krisk categories of / and .+ but all would be / given note @

conditions0

&n & .345+ dated C//C+ on page 1+ fourth paragraph+ last sentence : Hquipment below C5/< need not be considered unless it involves at least one .C3 k


99/121

-leared Fault Threshold

-leared Fault Threshold+ determines the portion of the Total Arcing Faultcurrent at the ?us that needs to be interrupted by protective devices to

etinguish the arc0 Therefore the remaining portion of Arcing Fault current+ if

any+ can not sustain the arc and will not be considered in the accumulated

incident energy0 nter a value in percent of the total bus fault current+ the

default value is 4/J+ which means that the final arc fault trip time is based on

when 4/J or more of the total fault current at the bus has been cleared0 &n the,ummary


100/121

+us o!tion: The bus report assumes that the fault occurs at the equipment

bus0 &f the bus has multiple contributions+ the devices that trip each branch

contribution will be listed in the order they trip+ and incident energy will be

accumulated until a significant percentage of the fault current has tripped0 Thesignificant portion is defined by the H-leared Fault ThresholdI percentage you

specify0

6e!ort C!tions

6e!ort C!tions


101/121

! !

Protecti$e De$ice >oad Side o!tion: The load side report applies a fault at theload side $To nd% of each protective device whose line side $From nd% is connected

directly to a bus without having an impedance device between the bus and the protective

device0 The protective device being evaluated is the one that clears the fault0 The fault

current through the device will be used to calculate the arcing fault current and obtain the

trip time from the T--0 ou can then select to include Line U Load ,ides -ontributions $to

represent both ends hot% in calculating the incident energy+ or to include Line ,ide

-ontributions only in which case the load side contributions are not included $now working

as if the load side is disconnected%0

Protecti$e De$ice >ine Side o!tion: The line side report applies a fault at the lineside $From nd% of each protective device whose load side $To nd% is connected directly

to a bus without having an impedance device between the bus and the protective device0

ou can then selected to include Line U Load ,ides -ontributions or to include Line ,ide

-ontributions only0 The first case represent both ends hot+ this occur if the main breaker

failed to open+ and the net upstream device is the one that must clear the fault0 &f there ismore than one contribution when there is a fault at the line side+ incident energy will be

accumulated up to the fault contribution percentage specified0 &f Line ,ide -ontributions

6nly is selected+ the load side contributions are not included and it is now working as if the

load side is disconnected0

6e!ort C!tions


102/121

! !

+us >ine Side o!tion: This option combines the bus report option and the

line side report option into one report0 -alculated result for the bus and line side

will be listed net to each other for easier comparison of worse case scenario0 A

special custom label is supplied by )T" to put both bus and line side results in

one single label0

S i M


103/121

Scenario Manager

Bse Scenario Manager to

e$aluate alternati$eo!erating scenarios for the

!ower system# including

minimum and ma(imum

fault conditions# and

!ro!osed design changes2

002-TX A PRI

TXL1


R2

Data


104/121

TX A

SWGR

C1

C2

C3C4

M8 M10

TX B PRI

005-TXD PRI

006-TX3 PRI

007-TX E PRI

TX E

BLDG 115 SERV

C10 C11

026-TX G PRI 025-MTR 25

02-TX D SEC

TX G

027-DSB 3

C13 A

L3

028-MTR 28

M 28 ! 1"2


C7

013-DS SWG2

C8

020-DS SWG3

C

M3

G2

021-TX # PRI

TX6

022-DSB 2

C12

023-MTR 23

L1

M4

TX4

M25

TX C

S SWG1

C5

C6

G1

TX C PRI

010-MTR 10

TX3

TRIB

M5

C14 C16

C17

C 1A 016-H2A

017-H1AS$%&''( !1

S$%&''( !2A

L

L10

G3

C21

MCC 15APA)EL S3

TX 3W)D

SWBD 1

CB3

R3

# TX C

#5

# TX 3

B-SWBD1

LVP1

CB6

R6

R G2

CB G2

R G3

CB G3

R G1

CB G1

MCP5

#2

CB5

R5

CB2

CB M8

R M8

CB M10

R M10

CB7

R7SW1

CAP !1

# 4

C13 B

LVP5

028-MTR 28 B

LVP4

M28 !3

MCP M28 !3 MCP M28 !4

M28 !4

S-M25

#-M25

LVP2 LVP3

R7 SEC

# TX G SEC

002-TX A PRI

TXL1


R2

&ssues


105/121

TX A

SWGR

C1

C2

C3C4

M8 M10

TX B PRI

005-TXD PRI

006-TX3 PRI

007-TX E PRI

TX E

BLDG 115 SERV

C10 C11

026-TX G PRI 025-MTR 25

02-TX D SEC

TX G

027-DSB 3

C13 A

L3

028-MTR 28

M 28 ! 1"2


C7

013-DS SWG2

C8

020-DS SWG3

C

M3

G2

021-TX # PRI

TX6

022-DSB 2

C12

023-MTR 23

L1

M4

TX4

M25

TX C

S SWG1

C5

C6

G1

TX C PRI

010-MTR 10

TX3

TRIB

M5

C14 C16

C17

C 1A 016-H2A

017-H1AS$%&''( !1

S$%&''( !2A

L

L10

G3

C21

MCC 15APA)EL S3

TX 3W)D

SWBD 1

CB3

R3

# TX C

#5

# TX 3

B-SWBD1

LVP1

CB6

R6

R G2

CB G2

R G3

CB G3

R G1

CB G1

MCP5

#2

CB5

R5

CB2

CB M8

R M8

CB M10

R M10

CB7

R7SW1

CAP !1

# 4

C13 B

LVP5

028-MTR 28 B

LVP4

M28 !3

MCP M28 !3 MCP M28 !4

M28 !4

S-M25

#-M25

LVP2 LVP3

R7 SEC

# TX G SEC

&ssues

Fault


106/121

TX A

SWGR

C1

C2

C3C4

M8 M10

TX B PRI

005-TXD PRI

006-TX3 PRI

007-TX E PRI

TX E

BLDG 115 SERV

C10 C11

026-TX G PRI 025-MTR 25

02-TX D SEC

TX G

027-DSB 3

C13 A

L3

028-MTR 28

M 28 ! 1"2


C7

013-DS SWG2

C8

020-DS SWG3

C

M3

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021-TX # PRI

TX6

022-DSB 2

C12

023-MTR 23

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TX C

S SWG1

C5

C6

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010-MTR 10

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CB G2

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CB M10

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CB7

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CAP !1

# 4

C13 B

LVP5

028-MTR 28 B

LVP4

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MCP M28 !3 MCP M28 !4

M28 !4

S-M25

#-M25

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# TX G SEC

What is the !ur!ose of an arc flash study)

Living with what one has and minimize the risks

Designing electrical safety into the power distributiondesign

To determine the protective clothing requirements forpersons working on live equipment

002-TX A PRI

TXL1


R2

PPE Ta'le


107/121

TX A

SWGR

C1

C2

C3C4

M8 M10

TX B PRI

005-TXD PRI

006-TX3 PRI

007-TX E PRI

TX E

BLDG 115 SERV

C10 C11

026-TX G PRI 025-MTR 25

02-TX D SEC

TX G

027-DSB 3

C13 A

L3

028-MTR 28

M 28 ! 1"2


C7

013-DS SWG2

C8

020-DS SWG3

C

M3

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021-TX # PRI

TX6

022-DSB 2

C12

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PPE Ta'le

002-TX A PRI

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R2

Labels using the ?us Detail button


108/121

TX A

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C1

C2

C3C4

M8 M10

TX B PRI

005-TXD PRI

006-TX3 PRI

007-TX E PRI

TX E

BLDG 115 SERV

C10 C11

026-TX G PRI 025-MTR 25

02-TX D SEC

TX G

027-DSB 3

C13 A

L3

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M 28 ! 1"2


C7

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R7 SEC

# TX G SEC

002-TX A PRI

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R2

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109/121

TX A

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C1

C2

C3C4

M8 M10

TX B PRI

005-TXD PRI

006-TX3 PRI

007-TX E PRI

TX E

BLDG 115 SERV

C10 C11

026-TX G PRI 025-MTR 25

02-TX D SEC

TX G

027-DSB 3

C13 A

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028-MTR 28

M 28 ! 1"2


C7

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C

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Labels using the ,tandard Label button

002-TX A PRI

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Labels using the -ustom Label button


110/121

TX A

SWGR

C1

C2

C3C4

M8 M10

TX B PRI

005-TXD PRI

006-TX3 PRI

007-TX E PRI

TX E

BLDG 115 SERV

C10 C11

026-TX G PRI 025-MTR 25

02-TX D SEC

TX G

027-DSB 3

C13 A

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C7

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R7 SEC

# TX G SEC


002-TX A PRI

TXL1


R2



111/121

TX A

SWGR

C1

C2

C3C4

M8 M10

TX B PRI

005-TXD PRI

006-TX3 PRI

007-TX E PRI

TX E

BLDG 115 SERV

C10 C11

026-TX G PRI 025-MTR 25

02-TX D SEC

TX G

027-DSB 3

C13 A

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C

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TX C

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R7 SEC

# TX G SEC


002-TX A PRI

TXL1


CB2

R2



112/121

TX A

SWGR

C1

C2

C3C4

M8 M10

TX B PRI

005-TXD PRI

006-TX3 PRI

007-TX E PRI

TX E

BLDG 115 SERV

C10 C11

026-TX G PRI 025-MTR 25

02-TX D SEC

TX G

027-DSB 3

C13 A

L3

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M 28 ! 1"2


C7

013-DS SWG2

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C

M3

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021-TX # PRI

TX6

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C12

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S SWG1

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# 4

C13 B

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M28 !4

S-M25

#-M25

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R7 SEC

# TX G SEC


002-TX A PRI

TXL1


CB2

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113/121

TX A

SWGR

C1

C2

C3C4

M8 M10

TX B PRI

005-TXD PRI

006-TX3 PRI

007-TX E PRI

TX E

BLDG 115 SERV

C10 C11

026-TX G PRI 025-MTR 25

02-TX D SEC

TX G

027-DSB 3

C13 A

L3

028-MTR 28

M 28 ! 1"2


C7

013-DS SWG2

C8

020-DS SWG3

C

M3

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021-TX # PRI

TX6

022-DSB 2

C12

023-MTR 23

L1

M4

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S SWG1

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L

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# 4

C13 B

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R7 SEC

# TX G SEC


002-TX A PRI

TXL1


CB2

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114/121

TX A

SWGR

C1

C2

C3C4

M8 M10

TX B PRI

005-TXD PRI

006-TX3 PRI

007-TX E PRI

TX E

BLDG 115 SERV

C10 C11

026-TX G PRI 025-MTR 25

02-TX D SEC

TX G

027-DSB 3

C13 A

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028-MTR 28

M 28 ! 1"2


C7

013-DS SWG2

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g


115/121

)roduce

"ork

)ermits

6ne=line with Arc Flash Data


116/121

002-TX A PRI

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6ole of Integrated Software


117/121

TX A

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C3C4

M8 M10

TX B PRI

005-TXD PRI

006-TX3 PRI

007-TX E PRI

TX E

BLDG 115 SERV

C10 C11

026-TX G PRI 025-MTR 25

02-TX D SEC

TX G

027-DSB 3

C13 A

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M 28 ! 1"2


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documented

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-osts of (ot )erforming Arc


118/121

-osts of (ot )erforming Arc

Flash ,tudies 6,7A Fines

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002-TX A PRI

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POWER TOOLS FOR WINDOWS

R2


119/121

TX A

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C2

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005-TXD PRI

006-TX3 PRI

007-TX E PRI

TX E

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C10 C11

026-TX G PRI 025-MTR 25

02-TX D SEC

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SoNwhy do & want to do

studies by hand+ with the

calculator or tables!

002-TX A PRI

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CB2

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+ecause


120/121

TX A

SWGR

C1

C2

C3 C4M8 M10

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005-TXD PRI

006-TX3 PRI

007-TX E PRI

TX E

BLDG 115 SERV

C10 C11

026-TX G PRI 025-MTR 25

02-TX D SEC

TX G

027-DSB 3

C13 A

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028-MTR 28

M 28 ! 1"2


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013-DS SWG2

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L1

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S SWG1

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R7 SEC

# TX G SEC

+ecause

& am from Teas

And a full=fledged masochist

:a$e Oreat E$ening


121/121

For Houston Integrated Software Arc Flash

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Transcript of For Houston Integrated Software Arc Flash