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Arc Flashhazardanalysis

Planning KitEverything You NeedTo Ensure The Success ofYour Arc Flash Project

electrical engineering division


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2 | Arc Flash Study Kit www.avotraining.com/eed

training institute

4 A Message for Managers

5 Before You Get Started

6 Whats the Process

8 Making an Apples to Apples Bid Comparison

9 How to Idenfy Compliant Labels

10 Template for Solicing Bids10 Request Study & Label Samples

11 Arc Flash Quesonnaire

WHAT IS AN ARC FLASH?

An arc ash occurs when electric current passes through the air

instead of its intended path. The result is extremely high heat

that causes severe burns, blinding light, and an explosion causing

hearing damage, bodily injury and can be fatal.

SHOCK HAZARD ANALYSIS?

NFPA 70E-2012 130.4 requires that a shock hazard analysis be

performed before beginning energized work. AVO includes a

shock hazard analysis as part of its arc ash hazard analysis and

shock protecon boundaries are printed on the labels. AVO

places a high priority on electrical safety and oers a full package

of electrical safety services.

why use this kit?

This Kit will help you plan and execute a successful Arc Flash

Hazard Analysis, by showing you how to:

f Build internal support for your analysis

f Idenfy the components necessary

for compliance

f Compare bids eecvely

who is this kit for

Managers who are responsible for the safety of personnel in

their facilies and OSHA compliance.

Managers who are planning to complete an Arc Flash Hazard

Analysis and want to collect pricing from qualied providers.

CONTENTS


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Arc FlashStudy Kit |

2012 AVO Training Institute

what do you need for asuccessful arc flashhazard analysis?

The success of your Arc Flash HazardAnalysis depends on the support

of people commied to protecng

personnel from arc ash hazards.

A narrow focus on costs or short cuts

oered by some engineering rms

typicallycomes at the expense of

personnel safety.

In this Kit, you will nd informaon that

will aid you in achieving the following

goals:

f Get Support. From the CEO to the

electricians helper, your enre

team needs to understand the value

of this analysis. Communicate,

communicate, communicate. Once

people understand the injuries and

fatalies this study can prevent

and the signicant nancial eects,

they are more likely to join you in

supporng the project.

f Allocate Resources. Before, during

and aer. The ability to implement

migaon recommendaons,

scheduling training, and supporng

a strong preventave maintenance

program will all contribute to the

success of your Analysis.


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Mulple arc ash incidents occur in

workplaces across the U.S. every day.

The risk of an arc ash explosion occuring

at your facility is not negligible. The

ongoing trend towards increasing power

usage combined with an aging electrical

infrastructure actually forecasts greaterrisk in the near future.

The Electrical Power Research Instute

esmates direct and indirect costs to an

employer from a fatal electrical accident

in the millions. This includes:

f Medical costs

f Lost producvity

f

Workers compensaonf Hiring and re-training

f Equipment replacement

f Facility repair

f Insurance premium increases

f OSHA citaons

f Ligaon and punive damages

And in the end, OSHA will enforce

compliance, including performing an

Arc Flash Hazard Analysis, through a

succession of inpecons that can leave

you scrambling.

While every facility will have its own

unique set of costs, it has been proven,without excepon, it is far more expensive

to allow one arc ash accident to occur

than it is to prevent it.

Dont let it happen to you


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before you getstarted

Use this checklist as a guide to avoid

common mistakes that can sabotage

your analysis before it even starts.

Read the current edion of the NFPA

70E. Aend a training course.

Share Arc Flash Hazard Analysis plans

with your electrical workers and ask

for their feedback.

Collect exisng one-line diagrams.

Collect electrical equipment mainte-

nance records.

Collect any previous engineering

study data - such as short circuit stud-

ies, protecve device coordinaon or

load ow studies.

Conrm the loads are properly

idened in the panel board direc-

tory to streamline the data gathering

process.

Select a plant electrician or techni-

cian familiar with equipment within

the facility to accompany the en-

gineering technician during data

collecon.

Communicate the schedule and pur-

pose of the engineering technician

who will be performing data collec-

on to all facility personnel.

Arrange for special access clearance,

as required, to reach areas with elec-

trical equipment.

Determine if there are acceptable

condions for the engineering techni-

cian to take photographs within your

facility.

Idenfy safety requirements specic

to your facility that the engineering

technician will need to follow during

data collecon.

Select the person who will review the

dra Arc Flash Hazard Analysis Report

during the review period

Schedule electrical personnel for

training in NFPA 70E safe work proce-

dures course.


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training institute

whats theprocess?

start to finish:your arc flashhazard analysis

AVO Electrical Engineering Division

adheres to a standardized process in

performing every Arc Flash Hazard

Analysis. This correlates with IEEE

Standard 1584, Chapter 4.

Prior to beginning the actual study,

we will hold a project meeng (via

conference call or on site) with all

personnel who will be involved, to

establish roles, responsibilies and theplan for data gathering.

A standard analysis will apply to three

phase equipment rated 240 volts or

greater and rated lower than 240 volts

when served from a transformer 125 kva

and larger.* You will need to determine

if you want an expanded scope that

includes all 208 volt or DC equipment, or

if you want a single phase analysis.

The enre project will be performed

under the supervision of a Registered

Professional Engineer (PE).

* IEEE 1584 working group is considering

changes for its next revision.

step 1: data collectionQualied sta must gather data from all applicable electrical equipment. Required

informaon includes:

f Data from the ulity, including available fault current, operang voltage, and

specics regarding the ulitys protecve equipment at the point of service

f Specics for each protecve device in the electrical system, including manufacturer

model, available me/current sengs, and short-circuit interrupng rang

f Transformer impedance, tap sengs and rangs

f Conductor specics, including lengths, sizes, and types of all overhead lines, bus

ducts, and cables

step 2: power system modelingOne line diagrams must be developed or updated to show the current conguraon

and modes of operaon for the power system. Accurate electrical system drawings are

necessary to idenfy power sources, voltage levels, electrical equipment and protecve

devices. If you already have one-line diagrams, we will update the data and work from

them, if possible. We use SKM Power Tools for Windows, ETAP, ARC Pro and other

available engineering soware.

step 3: short circuit studyA short circuit study is required to determine the magnitude of current owing

throughout the power system at crical points at various me intervals aer a

fault occurs. These calculaons will be used to determine the bolted fault current,

which is essenal for the calculaon of incident energy and interrupng rangs ofyour equipment. Comparison of equipment rangs with calculated short circuit and

operang condions will idenfy underrated equipment.

We perform this study in accordance with ANSI Std. C37 and IEEE Std. 141-1993 (Red Book).

step 1

data collectionpower system

modelingshort circui

study

step 2 step 3


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So how long isthis going to take?Duraon is aected by the type of

equipment and other condions, but

through experience we have establishedthe following Project Duraon Formula:

3.2x100

step 4: protective device coordinationA protecve device coordinaon should be performed to ensure selecon and

arrangement of protecve devices limits the eects of an overcurrent situaon to the

smallest area. Results will be used to make recommendaons for migaon of arc ash

hazards. Although this is anoponal study, arc ash migaon cannot be performed

without compleng this step. We perform this study in accordance with IEEE Std. 242-

2001 (Bu Book).

step 5: arc flash calculationsThese calculaons are based on available short circuit current, protecve device

clearing me and distance from the arc. Calculaons of incident energy levels and

ash protecon boundaries will be completed for all relevant equipment busses. The

magnitude of arc hazards are determined using methods from NFPA 70E, IEEE 1584 or

NESC Tables 410-1 and 410-2, as applicable.

step 6: reportingUpon compleon of the calculaons, we will prepare your Arc Flash Hazard Analysis

Report. This will be supplied to you for a short review period, during which your team

can review migaon recommendaons. At this point, we can hold a Management

Summary meeng to intepret the report results. Upon approval, we will provide a

nal report and full sized one-line diagrams, stamped by our Registered PE. The

drawings and report will also be supplied to you in a digital format.

step 7: label installation

We will generate and install arc ash hazard warning labels. These labels idenfyincident energy and working distance, nominal system voltage, and the arc ash

boundary. In addion to standard requirements, our labels also include Limited,

Restricted and Prohibited approach boundaries, date, upstream protecve device

and recommended personal protecon equipment. We can also provide bolted fault

current if desired. We provide labels that are compliant with NFPA 70E 130.3(c), NEC

110.24(A) and ANSI Z535.

= y

protective devicecoordination

arc flashcalculations

reportinglabel

installation

ep 4 step 5 step 6 step 7

where x = the quanty of

components in your power

system (phase equipment

rated 240 volts or greater

and three phase equipment

rated lower than 240 volts

when served from a 125+

kva transformer)

and

where y= the esmated

duraon of the project

(in days)


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training institute

making an

apples to applesbid comparison

SCOPE avo BID 2 BID 3

Field Data Collecon *

Analysis of Equipment Less Than 240v Available

Power System Modeling

Short Circuit Study

Idenfy Underrated Equipment

Protecve Device Coordinaon

Non-Commercial Migaon Recommendaons

Determine Incident Energy Levels

Determine Flash Protecon Boundaries

Arc Flash Report Dra Review Period

Interim Review by Professional Engineer

Print Arc Flash Labels

Produce Full-sized One-Line Diagrams

Final Report Stamped by Professional Engineer

Installaon of Arc Flash Labels *

Final Report, One-lines and Digital Files Delivered **

Comparing Arc Flash Hazard Analysis

bids can be confusing.If your prices

are widely varied, very likely so are the

deliverables youre geng with each. Use

the following chart to compare bids.

* Data collecon and installaon of labels can be completed by your Qualied

personnel or by AVO Electrical Engineering Division.

** You may also want to consider both AVOs NFPA 70E training and an annual Data

Maintenance.


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Arc FlashStudy Kit | 9


NFPA 70E 130.5(C)Requirements

Nominal voltage

Arc Flash boundary

Hazard level indicator, only one of the

following is necessary:

Incident energy and working distance

Clothing arc rang and required PPE

Hazard Risk Category

ANSI Z535 Requirements Orange header with warning symbol

WARNING text

Font and label size

White with black text (or reverse)

Resistant to environment

nec 110.16 Requirements Label placement

nec 110.24 (A)Requirements

Maximum available fault current

Date

nFPA 70E 130.4Requirements

Limited approach boundary

Restricted approach boundary

Prohibited approach boundary

This is an example of an arc ash hazard warning label produced by AVO Engineering

Division. Every characterisc of this label is intenonal and serves a purpose. When

selecng a provider, you should ensure the labels meet the following minimum

compliance requirements.

AVO Engineering Division provides the following oponal informaon: inventoryideners, bus numbers, bolted fault current, and approach boundaries.

how to identifycompliant labels

Once your compliant

labels are installed, its

not over.

NFPA 70E requires that

your labels be updated

when you make major

equipment or system

changes and at a

minimum of every 5

years. AVO Engineering

Division oers a low-

cost Data Maintenance

Plan that will keep your

labels in compliance.

keepingcompliant labels


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training institute

Request Report& Label Sample

It is always a good idea to request

samples of the Arc Flash Hazard Analysis

Report from each potenal provider.

While this Report is based on technical

data, you need to ensure that the report

uses language and formang that willbe easily understood by all relevant

personnel.

Besides the results from each part of the

study, the report should include:

f An execuve summarywith concise

ndings and recommendaons

f The methodologyusedf The input dataused, including any

assumpons in calculaons

f Protecve device me current curves

We consider samples of our reports and

one-line diagrams propriety informaon.

For this reason, we will want to speak

with you about your project before

sending you samples.

Contact

Melanie Farley Direct: 214.331.7318

1.877.594.3156

[email protected]

Fax 214.331.7363

A Template forSoliciting Bids

An Arc Flash Hazard Analysis is a complex

project and we understand that you may

need to compare mulple providers.

Pung together a Request for Proposals

can be me consuming. Based on our

experience weve developed a templateto help you avoid known problems that

arise from incomplete RFPs.

This 14 page Arc Flash Hazard Analysis

Request for Proposaltemplate includes

the following secons:

f Project Objecve

f Provider Qualicaons & Experiencef Detailed Scope of Work with

Deliverables

f Pricing Criteria

f Evaluaon Criteria

If you need assistance customizing this

RFP or have any quesons regarding the

contents, please contact Melanie Farley at

[email protected] or

214.331.7318.

Download the Word document

www.avotraining.com/common/

documents/avotraining/RFP.doc
http://www.avotraining.com/common/documents/avotraining/RFP.dochttp://www.avotraining.com/common/documents/avotraining/RFP.dochttp://www.avotraining.com/common/documents/avotraining/RFP.dochttp://www.avotraining.com/common/documents/avotraining/RFP.doc


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get access to the bestarc flashexpertise

www.avotraining.com

Melanie FarleyNaonal Sales Manager

1.877.594.3156, ext 7318214.331.7318

Fax [email protected]

http://www.avotraining.com/http://www.avotraining.com/

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