rech oard & associates -...

KRECH OJARD & ASSOCIATES | Engineers + Architects

COVER LETTER

March 31, 2014

University of Wisconsin - MadisonPROJECT # 14A2MUWMSN Arc Flash Hazard Analysis

Dear Mr. Kurt Johnson,

Thank you for reviewing Krech Ojard as a choice to perform the surveys, provide analysis, and install arc flash labeling for building electrical equipment in UW-Madison facilities.

Krech Ojard & Associates has done many arc flash hazard analysis studies in the state of Wisconsin, including Midwest Energy in Superior, Marquip in Phillips, and TransCanada in Iron River. All of our studies are overseen by our in-house, state of Wisconsin registered, professional engineers.

Over time, we have gained a reputation for high quality work and thorough presentation of that work. This ability comes from our insistence upon having our trained staff collect the data on-site, researching the differing types of electrical fusing & breakers, understanding your power system characteristics, and knowing the latest NFPA 70E and NEC standards.

Our scope of experience includes:• Performing Coordination, Load Flow, and/Short Circuit Analysis Studies. • Performing Arc Flash Analysis Studies for large & small companies using both SKM

Power*Tools® & EasyPower® software. • Working with clients to mitigate arc flash issues. • Conducting an arc flash safety seminar for Midwest Energy in Superior, Wisconsin. • Managing electrical construction activities.• Working with Microsoft project and Primavera for managing projects, budgets,

purchasing materials, & scheduling people.

Attached are the resumes of the two (2) professional electrical engineers that would be responsible for this project, along with site specific projects, our arc flash process, excerpts from a sample arc flash report, and typical one-line diagrams.

I look forward to meeting you and working together on this arc flash hazard analysis project.

Sincerely,

JIM TORSTENSON, PEELECTRICAL SYSTEMS GROUP MANAGER

Krech Ojard & Associates, Inc.1901 North Mountain RoadWausau, WI 54401(715) [email protected]

KRECH OJARD & ASSOCIATES | Engineers + Architects 1

SPOONER ARSKEMP ARS

TROUT LAKE RESEARCH STATION

RHINELANDER ARS

WAUSAU PENINSULAR ARS

MARSHFIELD ARS

HANCOCK ARS

ARLINGTON ARS

LANCASTER ARS

DANE COUNTYFACILITIES

MADISON

DANE COUNTY FACILITIES INCLUDE:• PINE BLUFF OBSERVATORY• WEST MADISON ARS• CHARMANY FARM• ARBORETUM• MANDT FARM• KEGONSA RESEARCH CENTER

LOCATION MAP

Krech Ojard office in relationship to University of Wisconsin - Madison facilities


Krech Ojard’s Electrical Engineering Group can bring you the confidence of electrical reliability. We are capable of working with your entire power distribution from the 15kV substation switchgear to the low voltage automation.

KO can meet your electrical facility needs by documenting, tracking, and assisting you in making upgrades and repairs to your facility with your process requirements.

Our approach to finding solutions involves bringing together skilled individuals from multiple disciplines represented at our firm. This allows us to address all aspects of a project cohesively, streamlines the process, and enables us to be more responsive to the needs of our clients.

We enjoy the challenges presented by unique projects and pride ourselves on our ability to find the most innovative, and effective solutions possible, while still maintaining our cost-effective, value-focused approach to projects

ELECTRICAL ENGINEERING GROUP

Jim Torstenson, PEElectrical Engineering Project Manager ELECTRICAL ENGINEERINGSERVICES

Power SystemsOne-Line DrawingsCoordination StudiesLoad Flow StudiesShort Circuit StudiesEquipment EvaluationMCC layoutsVFD installation/Startup

InstrumentationLoop DrawingsPLC /DCS DesignInstrument EvaluationCalculationsCommissioning

Electrical StandardsIEEEISANEC (NFPA 70 & &70E)Hazardous Location

LightingLighting LayoutLighting Design

Project ManagementScheduling/ReportingShutdown/Startup PlanningCommissioningOn-site Coordination

REPRESENTATIVE PROJECTS

Minnesota PowerHibbard StationInstrumentation LoopsMotor ElementariesDuluth, Minnesota

MinnTac MiningRail Scale ProjectNetworking Assist.Cable & conduit schedulesMountain Iron, Minnesota

Midwest EnergyPower System One-line DrawingsCoordination studyShort Circuit StudyArc Flash AnalysisCombustible Dust ClassificationSuperior, Wisconsin

Wausau PaperTransformer ReplacementProject ManagementRelay CoordinationMosinee, Wisconsin

United Taconite5kV VFD StudyEnergy AnalysisCost EstimateInstallation DrawingsForbes, Minnesota

Enbridge PipelineLine 1&2 Flow meter InstallPLC connectionsLoop DrawingsSuperior, Wisconsin

ELECTRICAL GROUP


PROFESSIONAL EXPERIENCE

Performed Power System/Arc Flash Analysis Studies

Project Management Engineer for Paper Mill

Electrical Assessment and Reliability report for North-shore Mining

Electrical Construction Administration

Oversee upgrades to existing system power grid including hi voltage cables, surge arresters, capacitors, relay trip units, switchgear, & transformers.

Electrical Engineer on Wood room Upgrade. (DEAL Debarker, 600 hp Carthage rotary chipper, Step feeder, Blowers & Conveyors)

Senior process control engineer for pulp & utilities department

Layout of electrical power, controls, and lighting forCanadian National (CN)

Work with SAP e-business software for managing projects, budgets, purchasing materials, & scheduling people.

Green Energy Project interface with Utility Company.

Team electrical engineer for NFPA 70E (electrical safety) implementation

Project Manager - Bark Fired Boiler Ash Handling System

Installation & commissioning of 5kV motor starters with electronic relays

Project Manager for AC Drive System upgrade to fine paper machine

Instructor “Boiler House Math” at North Central Technical College

Project Manager in charge of design & installation of Low NOx Burners on 150,000# /hr and 250,000# /hr pulverized coal fired boilers (DB Riley/CE)

Supervisor & engineer in charge of demineralizer plant & hot process softener system to boiler house and CFB

Process Engineer on 400,000#/hr Circulating Fluidized Bed Boiler (PyroPower design) w/ 45 MW Turbine-generator

Engineer in charge of rebuild of 4 steam turbine generators ranging in size from 4 MW to 7.5 MW (GE/Westinghouse)

Jim Torstenson is the Electrical Services Group Manager at Krech Ojard & Associates, specializing in project engineering, process control and operations management. Torstenson has over twenty years of experience in engineering design, project management, operations management, construction supervision, startup, and documentation of industrial electrical and control systems. Experience includes: facility master planning, DCS/PLC controls, HV/LV switchgear, power house operations, power system studies, construction administration, NEC conformance, NFPA 70E electrical safety, and facility maintenance.

EducationBS – Electrical Engineering

South Dakota School of Mines & TechnologyRapid City, South Dakota

Registrations

Professional Engineering License (WIS)ISA Senior Member

MSHA Certificate

Professional MembershipsISA Senior Member

MSHA Certificate

TrainingCoordination & Protection of

Power Systems Certificate University of Wisconsin Madison

Fisher Provox Distributed Control SystemAustin, Texas

Nalco Water Treatment SeminarNaperville, Illinois

Supervisor Training CertificateUniversity of Wisconsin Stevens Point

JAMES D. TORSTENSON, PE Electrical Services Group Manager


KENNETH J. KALMON, PE Electrical Engineer

Kenneth Kalmon is a registered Professional Electrical Engineer in ten U.S. states with 31 years experience. Kalmon has significant experience as a Plant Engineer, Project Engineer, or Electrical Engineer for various types of energy plants from electric to nuclear, and also manufacturing plants.

Kalmon now offers his breadth of experience to Krech Ojard’s clients.

EducationBachelor of Science - Electrical Engineering

University of Wisconsin - Madison Madison, Wisconsin

RegistrationsWisconsin MinnesotaMichigan New York

Washington Oregon

California Colorado

MississippiPennsylvania

Active NCEES record.

REPRESENTATIVE PROJECTS

KRECH OJARD & ASSOCIATES – Senior EngineerJuly 2010 – PresentPerformed electrical engineering and plan development that included processing plant power system design, electrical underground duct bank design, low and medium voltage power and control, and power system studies. Performed arc flash studies for Vector Pipeline/Enbridge compressor stations located in Illinois, Indiana and Michigan. Performed short circuit currant and protec-tion device coordination power studies for coal handling facility in Superior, Wisconsin.Wausau, Wisconsin POWER ENGINEERS – INDUSTRIAL FACILITIES ELECTRI-CAL CONTROLS DEPARTMENT – Electrical Engineer June 2008 – July 2010Performed electrical engineering and plan development that included designing low and medium voltage power distribution, electrical underground duct bank, street lighting and process control systems. In addition to plan development, work included specification writing, load flow, short circuit, coordination and arc flash power stud-ies. Projects were for electric generating, mining, ship loading, potato processing and cereal making facilities.Plover, Wisconsin

L&S ELECTRIC - ENGINEERING DIVISION–Project EngineerJanuary 2004–May 2008/Dec 1993–Nov 1996Project engineer working on speed governing, plant controls, and electrical protection projects to be installed at hydro-electric generating stations. Responsible for electrical and hydraulic design, assisting project manu-facturing, equipment testing, PLC programming, installa-tion engineering and project startup and commissioning. Also responsible for project budget, scheduling, and project management. Schofield, Wisconsin VAN ERT ELECTRIC COMPANY, INC., ENGINEERING DEPARTMENT – Project EngineerDecember 1996 – December 2003Project engineer for industrials control projects at paper mills and manufacturing facilities. Projects include MCC replacements, paper machine winder replacements, wet lap machine control, floor tile system press and conveyor control. Responsible for electrical construction engineering, PLC programming, operator interface programming, drive setup and startup, and system testing. Responsible for elec-trical protection device coordination, transformer, cable and capacitor sizing, power monitoring and reporting. Wausau, Wisconsin


Facility installations need to comply with regulatory standards including; 29CFR-OSHA, NFPA 70, and NFPA 70E. Non-compliance could result in substantial fines, loss of reputation, equipment damage, personal injury, and death. NFPA 70E compliance starts with the completion of a comprehensive arc flash study.

Krech Ojard (KO) performs arc flash studies of varying size and complexity, from relatively simple single 480V MCC installations, to large complex distribution systems.

Arc flash Issues include insufficient working spaces, inadequate withstand ratings of existing equipment, inadequate personal protective equipment (PPE), lack of hazard warning labels on electrical equipment, lack of documented safety programs, and outdated training for employees.

KO arc flash studies identify arc flash issues through on-site data collection, power system modeling, and case study calculations. Findings are detailed, issues are prioritized, and arc flash remediation recommendations are presented in the KO arc flash study report.

Keep your personnel safe from Arc Flash. Keep your electrical systems functioning to protect your profits and assets, and decrease your concerns over expenses incurred from damaged equipment and regulatory agency actions.

ARC FLASH STUDY & RECOMMENDATION FOR

CODE COMPLIANCE

Arc Flash Remediation considerations include:• Installation of hazard

warning labels that indicate PPE requirements, flash hazard boundaries & approach boundaries

• Electrical protective device trip setting changes

• Installation of remote controlled switch/circuit breaker operators

• Electrical system configuration changes

• Replacement of over-dutied electrical equipment

• Installation of arc flash reduction maintenance switch circuits

• Training for employees

Quoted from OSHA data: Arc flash dangers include:o Arc temperatures of

35,000 deg. F (nearly 4 times that of the surface of the sun)

o Intense sound blasts exceeding 165 dB (above the point of eardrum rupture)

o Toxic combustion gases

o Flying shrapnel and molten metal traveling at speeds exceeding 700 mph.

Krech Ojard Provided Services:• Arc Flash

Calculations, Reports, and Equipment Labeling

• Power System Studies

• Short Circuit Analysis Studies

• Protective Device Coordination Studies

Potential Sectors:• Private Industry and

Manufacturing• Government• Municipal

and Public Administration

• Energy and Utilities• Transportation

Arc Flash Anaylsis Software:• SKM Power*Tools®

• EasyPower®


MARQUIP WARD UNITED ARC FLASH STUDY

Phillips, Wisconsin

Clients Marquip Ward United

Completed2010

Krech Ojard & Associates Electrical Group (KO) performed an Arc Flash Study for Marquip Ward United’s Phillips, Wisconsin facility. The facility requested having their periodic Arc Flash study updated and having their equipment labeled to meet NFPA 70E standards.

Deliverables included an arc flash report, updating of SKM Powertools one-line files, creation of base AutoCAD one-line drawing files for client.

Activities included a collection of data for switch, fuse, and breaker sizing. Data was also collected regarding bus assembly sizing and ratings, creating a labeling system for ease of reference, locating sub-panels, editing of SKM files, drafting of existing panels in the form of one-line drawings.

KO Services Electrical EngineeringArc Flash Study

Facility SizeApprox. 345,000sf


USG SHORT-CIRCUIT ANALYSIS

& ARC FLASH STUDY Cloquet, Minnesota

Clients United States Gypsum

Completed2011

United States Gypsum (USG) required that an arc flash hazard analysis be performed at their USG Interiors, Inc. facility in Cloquet, Minnesota. The arc flash hazard analysis was to be performed from the main service entrance down to the Motor Control Center (MCC) level to establish the Personal Protective Equipment (PPE) required for personnel working on the plant’s electrical system. Krech Ojard & Associates’ (KOA) Electrical Group provided on-site data collection during a weekend shutdown period. Data was gathered to retrieve information on the electrical power system design in preparation for the power system studies needed for the arc flash hazard analysis. Substation switchgear data and electrical protective device ratings and settings were collected along with conductor sizes and lengths down to the MCC and 480V panel level.

The data collected on-site was used to model the USG facility’s electrical power system with SKM Power Tools® software. A short circuit current study and device rating evaluation were performed. The final report listed over-dutied equipment. An arc flash study was performed using IEEE 1584 methods, and PPE requirements were determined based on NFPA 70E categories. Arc flash remediation recommendations were presented in the final report for those areas requiring PPE Category 3 or higher. Coordination studies were performed for electrical protective devices at each of the high PPE category areas.

The short circuit current study results included, arc flash study results, coordination study results (including Time vs. Current Curve plots), remediation recommendations, and plant one-line diagram drawings. The arc flash report was presented to USG for their review and comments prior to printing of arc flash hazard warning labels.

KO Services Electrical

Facility SizeApprox. 700,000sf22 Substations


ENBRIDGE INC./VECTOR PIPELINE Various Locations in Michigan, Illinois,

and Indiana

Clients Enbridge Inc./Vector Pipeline

LocationsElwood, Illinois LaPorte, Indiana Athens, Michigan Highland, Michigan Washington, Michigan

Completed2010

Krech Ojard & Associates (KOA) was contracted to perform a short circuit current and arc flash analysis at five of Enbridge/Vector Pipeline’s compressor stations. The Electrical Group collected data to create models of the electrical systems in order to perform the analyses. The ultimate objective was to specify and provide labels that warn workers of the electrical arc flash hazard at various locations at the stations. KOA was also contracted to provide recommendations for reducing higher risk areas to arc flash hazard/risk Category 2 or lower.

KO Services Arc Flash Hazard Analysis Provide Arc Flash Hazard Warning Labels

ARC FLASH STUDY PROCESS


ARC FLASH STUDY PROCESS (Short-Circuit/Coordination/Arc

Flash Hazard Analysis)

The intent of this document is to specify work to be performed by Krech Ojard & Associates, Inc. to provide University of Wisconsin - Madison an accurate and viable arc flash study for their facilities across the state of Wisconsin.”

PART 1: GENERAL1.01 SCOPEA. Electrical One-Line System Diagrams – To provide the customer with accurate

documentation of the facilities’ electrical distribution systems based on power system circuit tracing and field verification.

B. Short Circuit Study – To determine three-phase, single-line to ground, line-to line, and double line to ground fault currents; RMS momentary fault currents; asymmetrical fault duties at three, five, and eight cycles; the positive, negative, and zero sequence impedance values between each fault location, and contributions from utilities, generators, and motors. At each fault location, the direction, X/R, and magnitude of fault currents are reported, thus providing a clear view of the conditions that exist during a fault on the system.

C. Protective Device Coordination Study – To determine if the facilities’ circuit breakers, fuses, relays and other protective devices are selected and set to minimize area outages for faults on downstream buses and also correctly protect circuit components from overcurrent conditions.

D. Arc Flash Hazard Analysis Study – To determine the energy available at a bus during a fault condition. The calculated energy available allows the engineer to determine Personal Protective Equipment (PPE) that needs to be worn when energized work is being performed at the bus.

E. The scope of the diagrams and studies shall include affected existing distribution equipment at the customer facilities.

1.02 REFERENCESA. Institute of Electrical and Electronics Engineers, Inc. (IEEE): 1. IEEE 141 – Recommended Practice for Electric Power Distribution and

Coordination of Industrial and Commercial Power Systems 2. IEEE 242 – Recommended Practice for Protection and Coordination of

Industrial and Commercial Power Systems 3. IEEE 399 – Recommended Practice for Industrial and Commercial Power

System Analysis 4. IEEE 241 – Recommended Practice for Electric Power Systems in Commercial

Buildings 5. IEEE 1015 – Recommended Practice for Applying Low-Voltage Circuit Breakers

Used in Industrial and Commercial Power Systems 6. IEEE 1584 - Guide for Performing Arc-Flash Hazard Calculations B. American National Standards Institute (ANSI): 1. ANSI C57.12.00 – Standard General Requirements for Liquid-Immersed

Distribution, Power, and Regulating Transformers 2. ANSI C37.13 – Standard for Low Voltage AC Power Circuit Breakers Used in Enclosures 3. ANSI C37.010 – Standard Application Guide for AC High Voltage Circuit

Breakers Rated on a Symmetrical Current Basis 4. ANSI C 37.41 – Standard Design Tests for High Voltage Fuses, Distribution

Enclosed Single-Pole Air Switches, Fuse Disconnecting Switches and Accessories




C. The National Fire Protection Association (NFPA): 1. NFPA 70 - National Electrical Code 2011 (NEC) 2. NFPA 70E – Standard for Electrical Safety in the Workplace

1.03 SUBMITTALS FOR REVIEW/APPROVALA. The electrical one-line diagrams shall be submitted for review and shall be approved

before power system studies are performed.

1.04 SUBMITTALS UPON COMPLETIONA. The results of the short-circuit, coordination and arc flash hazard analysis studies shall be

summarized in a final report. No more than three (3) bound copies of the report shall be submitted. Additional copies of the report, where required, shall be provided on CD in PDF format.

B. The report shall include the following sections: 1. Executive Summary 2. Descriptions, purpose, basis and scope of the study 3. Tabulations of circuit breaker, fuse and other protective device ratings versus

calculated short circuit duties 4. Protective device coordination studies including Time-Current Curve plots 5. Details of the incident energy and flash protection boundary calculations 6. Recommendations for system improvements, where needed, and notification of any

possible NEC related installation issues observed during the data collection process 7. One-line diagram that includes Personal Protective Equipment needs and

available short circuit current numbers 8. Arc flash labels shall be provided in hard copy only

1.05 QUALIFICATIONSA. The short-circuit, protective device coordination and arc flash hazard analysis studies

shall be conducted under the supervision and approval of a Registered Professional Electrical Engineer skilled in performing and interpreting the power system studies.

1.06 COMPUTER ANALYSIS SOFTWAREA. The studies shall be performed using the latest revision of the SKM Systems Analysis

Power*Tools for Windows (PTW) software program.

PART 2: PRODUCT2.01 STUDIESA. Krech Ojard shall furnish short-circuit studies performed and prepared by a licensed

professional engineer.B. Krech Ojard shall furnish protective device coordination studies.C. Krech Ojard shall furnish an Arc Flash Hazard Analysis Study per NFPA 70E - Standard

for Electrical Safety in the Workplace, reference Article 130.5 and Annex D.

2.02 DATA COLLECTIONA. Krech Ojard shall provide licensed professionals to trace and verify power system circuits

to obtain accurate electrical system one-line diagrams. It is acknowledged that existing diagrams and labeling are likely to be inaccurate.

B. Krech Ojard shall collect all data as required for the power system studies from the incoming service down to the 208VAC, three phase level, and shall include all three phase protective devices rated higher than 30A.

C. Krech Ojard shall collect motor load data for all motors 40HP and larger.D. Krech Ojard shall obtain required existing equipment data.




2.03 SHORT-CIRCUIT STUDYA. Actual conductor impedances shall be used, if known. If unknown, typical conductor

impedances based on IEEE Standard 141-1993 shall be used.B. Transformer design impedances shall be used when test impedances are not available.C. Power system model devices shall be named with tags consistent with the customer’s

Lock-out Tag-out naming convention.D. The following shall be provided: 1. Calculation methods and assumptions 2. One-line diagram of the system being evaluated 3. Source impedance data, including electric utility system and motor fault

contribution characteristics 4. Input data spreadsheet file with column that cross references power system model

device to electrical one-line diagram AutoCAD drawing and sheet number 5. Tabulations of calculated quantities 6. Results, conclusions, and recommendations.E. Short-circuit momentary and interrupting duties for a three-phase bolted fault shall be

calculated at each: 1. Electric utility’s supply termination point 2. Incoming switchgear 3. Unit substation primary and secondary terminals 4. Low voltage switchgear 5. Motor control centers 6. Standby generators and automatic transfer switches 7. Branch circuit panelboards 8. Other significant locations throughout the system as deemed by customer and engineer

2.04 PROTECTIVE DEVICE COORDINATION STUDYA. Protective device coordination shall be verified between main or feeder devices and the

largest rated protective device of each type on the supplied buses.B. Time-Current Curve (TCC) plots illustrating the state of coordination shall be provided.C. Both as-found TCC plots and TCC plots showing protective devices with recommended

trip ratings or settings shall be provided.D. Conductor, transformer, and standby generator protection shall be verified.

2.05 ARC FLASH HAZARD ANALYSISA. The arc flash hazard analysis shall be performed according to the IEEE 1584 equations

that are presented in NFPA70E-2012, Annex D.B. The flash protection boundary and the incident energy shall be calculated at all

significant locations in the electrical distribution system (switchboards, switchgear, motor-control centers, panel boards, busway and splitters) where work could be performed on energized parts.

C. Safe working distances shall be based upon the calculated arc flash boundary considering an incident energy of 1.2 cal/cm2.

D. When appropriate, the short circuit calculations and the clearing times of the phase overcurrent devices will be retrieved from the short-circuit model.

E. The short-circuit calculations and the corresponding incident energy calculations for multiple system scenarios must be compared and the greatest incident energy must be uniquely reported for each equipment location. Calculations must be performed to represent the maximum and minimum contributions of fault current magnitude for all normal and emergency operating conditions. The minimum calculation will assume that the utility contribution is at a minimum and will assume a minimum motor contribution (all motors




off). Conversely, the maximum calculation will assume a maximum contribution from the utility and will assume the maximum amount of motors to be operating. Calculations shall take into consideration the parallel operation of synchronous generators with the electric utility, where applicable.

F. The incident energy calculations must consider the accumulation of energy over time when performing arc flash calculations on buses with multiple sources. Iterative calculations must take into account the changing current contributions, as the sources are interrupted or decremented with time. Fault contribution from motors and generators should be decremented as follows:

1. Fault contribution from induction motors should not be considered beyond 3-5 cycles. 2. Fault contribution from synchronous motors and generators should be decayed

to match the actual decrement of each as closely as possible (e.g. contributions from permanent magnet generators will typically decay from 10 per unit to 3 per unit after 10 cycles).

G. For each equipment location with a separately enclosed main device (where there is adequate separation between the line side terminals of the main protective device and the work location), calculations for incident energy and flash protection boundary shall include both the line and load side of the main breaker.

H. When performing incident energy calculations on the line side of a main breaker (as required per above), the line side and load side contributions must be included in the fault calculation.

I. Mis-coordination should be checked amongst all devices within the branch containing the immediate protective device upstream of the calculation location and the calculation should utilize the fastest device to compute the incident energy for the corresponding location.

J. Arc Flash calculations shall be based on actual overcurrent protective device clearing time. Maximum clearing time will be capped at 2 seconds based on IEEE 1584-2002 section B.1.2. Where it is not physically possible to move outside of the flash protection boundary in less than 2 seconds during an arc flash event, a maximum clearing time based on the specific location shall be utilized.

2.06 REPORT SECTIONSA. Input data shall include, but not be limited to the following: 1. Feeder input data including feeder type (cable or bus), size, length, number per

phase, conduit type (magnetic or non-magnetic) and conductor material (copper or aluminum)

2. Transformer input data, including winding connections, secondary neutral-ground connection, primary and secondary voltage ratings, kVA rating, impedance, % taps and phase

3. Reactor data, including voltage rating, and impedance 4. Generation contribution data, (synchronous generators and Utility), including

short-circuit reactance (X”d), rated MVA, rated voltage, three-phase and single line-ground contribution (for Utility sources) and X/R ratio

5. Motor contribution data (induction motors and synchronous motors), including short-circuit reactance, rated horsepower or kVA, rated voltage, and X/R ratio




B. Short-Circuit Output Data shall include, but not be limited to the following reports: 1. Low Voltage Fault Report shall include a section for three-phase and unbalanced

fault calculations and shall show the following information for each applicable location:

a. Voltage b. Calculated fault current magnitude and angle c. Fault point X/R ratio d. Equivalent impedance 2. Momentary Duty Report shall include a section for three-phase and unbalanced

fault calculations and shall show the following information for each applicable location:

a. Voltage b. Calculated symmetrical fault current magnitude and angle c. Fault point X/R ratio d. Calculated asymmetrical fault currents e. Equivalent impedance 3. Interrupting Duty Report shall include a section for three-phase and unbalanced fault

calculations and shall show the following information for each applicable location: a. Voltage b. Calculated symmetrical fault current magnitude and angle c. Fault point X/R ratio d. No AC Decrement (NACD) Ratio e. Equivalent impedance f. Multiplying factors for 2, 3, 5 and 8 cycle circuit breakers rated on a

symmetrical basis g. Multiplying factors for 2, 3, 5 and 8 cycle circuit breakers rated on a

total basisC. Recommended Protective Device Settings: 1. Phase and Ground Relays: a. Current transformer ratio b. Current setting c. Time setting d. Instantaneous setting e. Recommendations on improved relaying systems, if applicable 2. Circuit Breakers: a. Adjustable pickups and time delays (long time, short time, ground) b. Adjustable time-current characteristic c. Adjustable instantaneous pickup d. Recommendations on improved trip systems, if applicableD. Incident energy and flash protection boundary calculations 1. Arcing fault magnitude 2. Protective device clearing time 3. Duration of arc 4. Arc flash boundary 5. Working distance 6. Incident energy 7. Hazard Risk Category 8. Recommendations for arc flash energy reduction for all areas calculated to have

Personal Protective Equipment rating requirements above Hazard Risk Category 2




PART 3: EXECUTION3.01 NOTIFICATIONSA. Notify customer in writing of any required major equipment modifications.

3.02 ARC FLASH WARNING LABELSA. Krech Ojard of shall provide a 4 in. x 6 in. thermal transfer type label for each work location.B. When applicable, two sets of labels shall be provided. One set shall indicate Arc Flash

Hazard parameters based on as-found protective device settings. The other shall indicate Arc Flash Hazard Risk parameters when recommended protective device settings have been applied.

C. The label shall include the following information, at a minimum: 1. Location designation with unique item name 2. Nominal voltage 3. Flash protection boundary 4. Limited approach boundary 5. Restricted approach boundary 6. Prohibited approach boundary 7. Shock hazard when covers are opened or removed 8. Hazard risk category 9. Incident energy 10. Working distance 11. True “fed from” identification for Lock-Out Tag-Out use. 12. Engineering report number and issue date.D. Labels shall be machine printed, with no field markings.E. Arc flash labels shall be provided in the following manner: 1. For each 600, 480 and applicable 208 volt panelboard, one arc flash label

shall be provided. 2. For each motor control center, one arc flash label shall be provided. 3. For each low voltage switchboard, one arc flash label shall be provided. 4. For each switchgear, one flash label shall be provided. 5. For medium voltage switches, one arc flash label shall be provided.F. Labels shall be field installed by Krech Ojard personnel or their representative.

SAMPLE ARC FLASH REPORT EXCERPTS

Sample Arc Flash Report

Prepared by:

Krech Ojard & Associates

March 2013

Contents

Scope of Work…………………………………………………………Page 1

Method of Analysis…………………………………………….……Page 1-2

Findings……………………………………………...………...………Page 3

Recommendations…………………………...………...………………Page 4

Component Descriptions & Settings……………………………………Tab 1

Fault Current Calculation Results………………………………………Tab 2

Short Circuit Current Rating Evaluation……………………..…………Tab 3

Arc Flash Study Results……………………………………...…………Tab 4

Time Versus Current Curve Plots…………………………...…………Tab 5

1

This is a sample of a detailed arc report based on studies performed by Krech Ojard & Associates in 2010 and 2011.

Scope of Work Krech Ojard & Associates was contracted to collect data in order to create a model of an electrical system and then use the model created to perform a short circuit current and arc flash hazard analysis. The ultimate objective was to specify and provide labels that warn workers of the electrical arc flash hazard at various locations at the station. Krech Ojard & Associates was also contracted to provide recommendations for reducing higher risk areas to arc flash hazard/risk Category 2 or lower.

Method of Analysis The goal of an arc flash calculation is to determine how much electrical energy, called incident energy, can be supplied to a fault at a certain location in an electrical system during a finite amount of time. Once incident energy is determined a hazard/risk category can be assigned. The NFPA 70E-2009 table 130.7(C) (11) defines five risk categories based on the calculated incident energy at a given working distance. For each hazard/risk category Personal Protective Equipment (PPE) is described that is designed to limit heat transfer to a level which would limit the wearer to second degree burns if exposed to the maximum incident energy listed for the category. The arc flash evaluation assigns hazard/risk categories to specific locations in the electrical system.

Arc flash is a calculation expressed in energy terms (cal/cm2 or Joules/cm2). The two most recognized arc flash calculation methods are the NFPA calculation and the IEEE 1584 calculation. The IEEE 1584 is considered the most accurate because it uses formulas that have been developed through measurement of energies recorded during actual IEEE arc flash tests. The IEEE 1584 calculation was used in this arc flash evaluation.

The available short circuit current and the protection device (circuit breaker, fuse, etc.) fault clearing times determine the level of incident energy that can be supplied to a fault. The available short circuit current was determined by modeling the electrical system in a software package. The software package used for this evaluation was SKM Power*Tools Version 6.5. The model was built using the provided one-line diagrams and any changes noted during a site data collection visit made on September 10, 2010. Conductor properties, cable lengths, and utility

2

service transformer size needed for the model were taken from additional drawings. The utility available fault current numbers provided were as follows:

3 Phase: 2694A @13.2kV, X/R = 2.51 Single Line to Ground: 1763A

Protection device selections and settings determine fault clearing times, and those selections and settings are determined through coordination studies. For this arc flash hazard analysis it was assumed that a coordination study had already been performed. Actual protection device manufacturer, model number and settings obtained from data collected from the site on September 10, 2010 were used in the analysis.

Short circuit current calculations and arc flash hazard evaluations were performed for automatic transfer switch in both the Normal and Emergency positions. The worst-case arc flash hazard/risk category for all electrical system locations resulted when the automatic transfer switch was in the Normal position. The arc flash hazard analysis was performed down to the 208VAC, three phase level. Industry practice is to not perform arc flash analysis for single phase systems and voltages less than 208V if served from a transformer smaller than 125KVA. This practice complies with NFPA 130.3 requirements. The arcing fault current will not be sustainable at the lower voltages and smaller available fault currents.

3

Findings All electrical equipment looked at for the site data collection was in very good condition. Insulated rubber mats were installed in front of all MCC sections. The short circuit current device evaluation performed for this study indicated that all modeled devices were rated for the fault current available at their location in the electrical system. These results are shown in the “Short Circuit Current Rating Evaluation” tab of this report. The results of the arc flash hazard analysis are shown in the “Arc Flash Study Results” tab of this report. Since electrical maintenance is common at the MCC and panelboard level of electrical systems, keeping these areas to arc flash hazard/risk Category 2 or lower is recommended. The MCC and panelboard areas that have arc flash hazard/risk category higher than Category 2 are as follows:

1. Lighting panel LP-5, Category 3 Areas that have arc flash hazard/risk category that are higher than Category 2 but may not be considered common electrical maintenance areas are listed below. It is recommended that the equipment be de-energized prior to performing electrical work at that location.

1. Standby generator SPU-1 terminals, Category 4 2. Standby generator breaker 52-G, Category 4 3. Standby generator breaker bypass 52-GB, Category 4 4. Utility service transformer terminals, Category Dangerous 5. Utility service breaker 52-U, Category Dangerous 6. Utility service breaker bypass 52-UB, Category Dangerous 7. Automatic transfer switch ATS-001, Category 3 8. Main feeder breaker 52-1, Category 3 9. Main feeder breaker 52-2, Category 3 10. Main feeder breaker 52-3, Category 3 11. Main feeder breaker 52-4, Category 3 12. Main feeder breaker 52-5, Category 3

4

Recommendations It is recommended that steps be taken to lower lighting panel LP-5 to arc flash hazard/risk Category 2 or lower. Several iterations to the electrical design were modeled and the calculations indicate LP-5 can be lowered to hazard/risk Category 0 if the following changes are made.

1. Remove the conductors and conduit between the secondary of transformer LT-5 and LP-5.

2. Install a separately-mounted main breaker and enclosure for LP-5 to be located at least 4

feet away from LP-5. The circuit breaker is to be Square D, Type JD, 150A, with instantaneous set at 5.

3. Install new conductors and conduit between the secondary of transformer LT-5 and the

new main breaker. The cable length from the transformer to the new main breaker must be between 10 and 40 feet to maintain a hazard/risk Category 0. This is for 90oC conductors routed in metal conduit. The circuit consists of one #1/0 AWG conductor per phase, one #1/0 AWG neutral conductor and one #6 AWG ground conductor.

4. Install new conductors and conduit between the new main breaker and LP-5. The cable

length from the new main breaker to LP-5 must be between 10 and 250 feet to maintain a hazard/risk Category 0. This is for 90oC conductors routed in metal conduit. The circuit consists of one #1/0 AWG conductor per phase, one #1/0 AWG neutral conductor and one #6 AWG ground conductor.

Component Descriptions &

Settings

Project: Washington

LOW VOLTAGE THERMAL MAGNETIC MOLDED CASE BREAKERS SETTINGS

DESIGNATION TRIP UNITFRAME

TYPE/MODELDescriptionMFRLocation/NameAmps

Frame

TYPE

MODEL

Amps

Sensor/Plug LT SETTING INST SETTING

Fixed FD 15 15 CUTLER-HA

MMER

FD15-225A 0BUS-MCC-1E

PD-1E/1H

Fixed HFD 50 50 CUTLER-HA

MMER

HFD15-225A 0BUS-MCC-1E

PD-1E/2C


MMER


PD-1E/2G


MMER

FD15-225A 0BUS-MCC-1E

PD-1E/3F

Thermal Curve (Fixed) INST (5-10 x Trip) 10KDB 150 150 CUTLER-HA

MMER

KDB100-400A 0BUS-MCC-1E

PD-1E/3H


MMER


PD-1E/3J


MMER


PD-1E/5A


MMER

FD15-225A 0BUS-MCC-1NE

PD-1NE/1C


MMER

FD15-225A 0BUS-MCC-1NE

PD-1NE/1D


MMER

HFD15-225A 0BUS-MCC-1NE

PD-1NE/1E


MMER


PD-1NE/2A


MMER


PD-1NE/2K


MMER


PD-1NE/3A


MMER


PD-2E/2C

leah.aston

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Motor Circuit Protectors

Project: Washington

Prot Dev ManufacturerConnected Bus SegmentsFrameFunc Name DescriptionTypeVoltage

PD-1E/2A BUS-MCC-1EPhase HMCPCUTLER-HAMMER INST (150-500A) H50A (150-500A Inst)HMCP 480

PD-1E/2E BUS-MCC-1EPhase HMCPCUTLER-HAMMER INST (90-300A) H30A (90-300A Inst)HMCP 480

PD-1E/4A BUS-MCC-1EPhase HMCPCUTLER-HAMMER INST (150-500A) D50A (150-500A Inst)HMCP 480

PD-1E/5E BUS-MCC-1EPhase HMCPCUTLER-HAMMER INST (150-500A) D50A (150-500A Inst)HMCP 480

PD-2E/2A BUS-MCC-2EPhase HMCPCUTLER-HAMMER INST (150-500A) D50A (150-500A Inst)HMCP 480

PD-2E/2E BUS-MCC-2EPhase HMCPCUTLER-HAMMER INST (90-300A) D30A (90-300A Inst)HMCP 480

PD-2E/4G BUS-MCC-2EPhase HMCPCUTLER-HAMMER INST (150-500A) D50A (150-500A Inst)HMCP 480

PD-2E/5G BUS-MCC-2EPhase HMCPCUTLER-HAMMER INST (150-500A) D50A (150-500A Inst)HMCP 480

PD-3/3E BUS-MCC-3Phase HMCPCUTLER-HAMMER INST (90-300A) D30A (90-300A Inst)HMCP 480

PD-3/4C BUS-MCC-3Phase HMCPCUTLER-HAMMER INST (45-150A) B15A (45-150A Inst)HMCP 480

PD-3/4F BUS-MCC-3Phase HMCPCUTLER-HAMMER INST (9-30A) D3A (9-30A Inst)HMCP 480

PD-3/5A BUS-MCC-3Phase HMCPCUTLER-HAMMER INST (21-70A) D7A (21-70A Inst)HMCP 480

PD-3/5D BUS-MCC-3Phase HMCPCUTLER-HAMMER INST (9-30A) D3A (9-30A Inst)HMCP 480

PD-3/6D BUS-MCC-3Phase HMCPCUTLER-HAMMER INST (150-500A) E50A (150-500A Inst)HMCP 480

PD-4/1RA BUS-MCC-4Phase HMCPCUTLER-HAMMER INST (150-500A) A50A (150-500A Inst)HMCP 480

PD-4/1RB BUS-MCC-4Phase HMCPCUTLER-HAMMER INST (150-500A) B50A (150-500A Inst)HMCP 480

PD-4/1RC BUS-MCC-4Phase HMCPCUTLER-HAMMER INST (150-500A) B50A (150-500A Inst)HMCP 480

PD-4/2FA BUS-MCC-4Phase HMCPCUTLER-HAMMER INST (150-500A) A50A (150-500A Inst)HMCP 480

PD-4/2FB BUS-MCC-4Phase HMCPCUTLER-HAMMER INST (150-500A) B50A (150-500A Inst)HMCP 480

PD-4/2FC BUS-MCC-4Phase HMCPCUTLER-HAMMER INST (150-500A) B50A (150-500A Inst)HMCP 480

PD-4/2RA BUS-MCC-4Phase HMCPCUTLER-HAMMER INST (150-500A) A50A (150-500A Inst)HMCP 480

PD-4/2RB BUS-MCC-4Phase HMCPCUTLER-HAMMER INST (150-500A) B50A (150-500A Inst)HMCP 480

PD-4/2RC BUS-MCC-4Phase HMCPCUTLER-HAMMER INST (150-500A) B50A (150-500A Inst)HMCP 480










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DAPPER Fault Analysis Input Report (English)

Project: Washington

Utilities

Contribution

From Name

Bus

Name

In/Out

Service

Nominal

Voltage

-------- Contribution Data -------- PU (100 MVA Base)

X PUR PUX/RUnitsDuty

UTIL-0001 BUS-UTIL1-PRI 13,200 Amps 2.51In 2,694

SLG:

3P:

Amps 2.51 3.898 1.553

Pos:

Zero: 1,763

0.601 1.508

Generators

Contribution

From Name

Bus

Name

In/Out

Service

Nominal

Voltage

-------- Contribution Data --------

Base kVA X" X/R

PU (100 MVA Base)

R PU X PU

GEN-SPU-1 480BUS-SPU1 775.00 23.42 0.83 19.35In

72,169.57

19.35 0.83

0.15

0.15

0.15

23.42

23.42 19.35

Motors

Contribution

From Name

Bus

Name

In/Out

Service

Nominal

Voltage

--------- Contribution Data --------

Base kVA Xd" X/R

PU (100 MVA Base)

R PU X PU

# of

Motors

MTR-3/1E BUS-3/1E 480 0.75 0.1692 10.00 2249.862 22,499.520In 1

MTR-3/1G BUS-3/1G 480 0.75 0.1692 10.00 2249.862 22,499.520In 1

MTR-3/5G BUS-3/5G 480 0.75 0.1692 10.00 2249.862 22,499.520In 1

MTR-600EF001 BUS-0159 480 0.75 0.1692 10.00 2249.862 22,499.520In 1

MTR-600EF002 BUS-0165 480 0.50 0.1692 10.00 3374.793 33,749.277In 1

MTR-600EF003 BUS-0160 480 0.50 0.1692 10.00 3374.793 33,749.277In 1

MTR-600EF004 BUS-0170 480 1.50 0.1692 10.00 1124.931 11,249.760In 1

MTR-600EF005 BUS-0164 480 2.01 0.1692 10.00 843.698 8,437.319In 1

MTR-605CR001 BUS-605CR001 480 20.05 0.1692 10.00 84.370 843.732In 1

MTR-605CR002 BUS-605CR002 480 20.05 0.1692 10.00 84.370 843.732In 1

MTR-605F001 BUS-0066 480 15.04 0.1692 10.00 112.493 1,124.976In 1

MTR-605F002 BUS-0067 480 15.04 0.1692 10.00 112.493 1,124.976In 1

MTR-605F003 BUS-0070 480 15.04 0.1692 10.00 112.493 1,124.976In 1

MTR-605F004 BUS-0071 480 15.04 0.1692 10.00 112.493 1,124.976In 1

MTR-760APU001 BUS-760APU001 480 25.07 0.1692 10.00 67.496 674.986In 1

MTR-760APU002 BUS-760APU002 480 25.07 0.1692 10.00 67.496 674.986In 1

MTR-B321-1 BUS-0051 480 15.04 0.1692 10.00 112.493 1,124.976In 1

1

leah.aston

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Contribution

From Name

Bus

Name

In/Out

Service

Nominal

Voltage

--------- Contribution Data --------

Base kVA Xd" X/R

PU (100 MVA Base)

R PU X PU

# of

Motors

MTR-B321-2 BUS-0055 480 15.04 0.1692 10.00 112.493 1,124.976In 1

MTR-B330-1 BUS-0065 480 75.20 0.1692 10.00 22.499 224.995In 1

MTR-B330-2 BUS-0069 480 75.20 0.1692 10.00 22.499 224.995In 1

MTR-B598-1-1 BUS-0053 480 10.03 0.1692 10.00 168.740 1,687.464In 1

MTR-B598-1-2 BUS-0059 480 10.03 0.1692 10.00 168.740 1,687.464In 1

MTR-F301A BUS-0110 480 15.04 0.1692 10.00 112.493 1,124.976In 1

MTR-F301B BUS-0111 480 15.04 0.1692 10.00 112.493 1,124.976In 1

MTR-F301C BUS-0112 480 15.04 0.1692 10.00 112.493 1,124.976In 1

MTR-F302A BUS-0114 480 15.04 0.1692 10.00 112.493 1,124.976In 1

MTR-F302B BUS-0115 480 15.04 0.1692 10.00 112.493 1,124.976In 1

MTR-F302C BUS-0116 480 15.04 0.1692 10.00 112.493 1,124.976In 1

MTR-F303A BUS-0118 480 15.04 0.1692 10.00 112.493 1,124.976In 1

MTR-F303B BUS-0119 480 15.04 0.1692 10.00 112.493 1,124.976In 1

MTR-F303C BUS-0120 480 15.04 0.1692 10.00 112.493 1,124.976In 1

MTR-F304A BUS-0122 480 15.04 0.1692 10.00 112.493 1,124.976In 1

MTR-F304B BUS-0123 480 15.04 0.1692 10.00 112.493 1,124.976In 1

MTR-F304C BUS-0124 480 15.04 0.1692 10.00 112.493 1,124.976In 1

MTR-F305A BUS-0126 480 15.04 0.1692 10.00 112.493 1,124.976In 1

MTR-F305B BUS-0127 480 15.04 0.1692 10.00 112.493 1,124.976In 1

MTR-F305C BUS-0128 480 15.04 0.1692 10.00 112.493 1,124.976In 1

MTR-F306A BUS-0130 480 15.04 0.1692 10.00 112.493 1,124.976In 1

MTR-F306B BUS-0131 480 15.04 0.1692 10.00 112.493 1,124.976In 1

MTR-F306C BUS-0132 480 15.04 0.1692 10.00 112.493 1,124.976In 1

MTRI-600CR003 BUS-600CR003 480 20.05 0.1692 10.00 84.370 843.732In 1

MTR-M201 BUS-0166 480 20.05 0.1692 10.00 84.370 843.732In 1

Cables

Cable

Name

From Bus

To Bus

Qty

/Ph

Length

Feet

------ Cable Description ------

Size Cond. Type Duct Type Insul

Per Unit (100 MVA Base)

R pu jX pu

In/Out

Service

BUS-MCC-1E

BUS-MCC-1NE

1 1 800 Epoxy Pos:

Zero:

0.0072 0.0055

0.0295

CBL-001 In

0.0431

BuswayCopper

BUS-52U-1

BUS-ATS001-N

1 1 1600 Epoxy Pos:

Zero:

0.0040 0.0021

0.0112

CBL-0011 In

0.0237

BuswayCopper

BUS-52U-1

BUS-ATS001-N

1 1 1600 Epoxy Pos:

Zero:

0.0040 0.0021

0.0112

CBL-0012 In

0.0237

BuswayCopper

BUS-52G-1

BUS-ATS001-E

1 1 1000 Epoxy Pos:

Zero:

0.0062 0.0029

0.0153

CBL-0013 In

0.0366

BuswayCopper

BUS-52G-1

BUS-ATS001-E

1 1 1000 Epoxy Pos:

Zero:

0.0062 0.0029

0.0153

CBL-0014 In

0.0366

BuswayCopper

BUS-MCC-2E

BUS-MCC-2NE

1 1 800 Epoxy Pos:

Zero:

0.0072 0.0055

0.0295

CBL-002 In

0.0431

BuswayCopper

2

Fault Current Calculation

Results

DAPPER Fault Contribution Complete Report

Comprehensive Short Circuit Study Settings

Three Phase Fault

Single Line to Ground

Line to Line Fault

Line to Line to Ground

All BusesFaulted Bus

Yes

Yes

Yes

No

No

Motor Contribution

Transformer Tap

Xformer Phase Shift

Yes

Yes

Bus Voltages

Branch Currents

Phase or Sequence

Fault Current Calculation

Asym Fault Current at Time 0.50

First Bus From Fault

First Branch From Fault

Report phase quantities

Initial Symmetrical RMS (with 1/2 Cycle Asym)

Cycles

Project: Washington

Bus Name

-------------Initial Symmetrical Amps-----------

3 Phase SLG LLG LL LLG LLSLG3 Phase SLG LLG

----------------Asymmetrical Amps---------------- ---Init Sym Neutral Amps---

---------Contributions---------

BUS-0050 5,110 0 0 5 5,110 0 0 5

InCABLECBL-P1007 5,110 0 0 5 5,110 0 0 5 5

BUS-0051 1,028 0 0 5 1,028 0 0 5

InIND-MTRMTR-B321-1 106 0 0 0 106 0 0 0

InCABLECBL-P1005A 1,000 0 0 5 1,000 0 0 5 5

BUS-0053 1,164 0 0 5 1,164 0 0 5

InIND-MTRMTR-B598-1-1 71 0 0 0 71 0 0 0

InCABLECBL-P1004A 1,147 0 0 5 1,147 0 0 5 5

BUS-0055 798 0 0 5 798 0 0 5

InIND-MTRMTR-B321-2 106 0 0 0 106 0 0 0

InCABLECBL-P2005A 771 0 0 5 771 0 0 5 5

BUS-0059 788 0 0 5 788 0 0 5

InIND-MTRMTR-B598-1-2 71 0 0 0 71 0 0 0

InCABLECBL-P2004A 771 0 0 5 771 0 0 5 5

BUS-0064 15,103 0 0 5 16,312 0 0 5

1

leah.aston

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Bus Name

-------------Initial Symmetrical Amps-----------

3 Phase SLG LLG LL LLG LLSLG3 Phase SLG LLG

----------------Asymmetrical Amps---------------- ---Init Sym Neutral Amps---

---------Contributions---------

InCABLECBL-P1009B 559 0 0 0 518 0 0 0

InVFD-B330-1 15,770 0 0 5 14,601 0 0 5 5

BUS-0065 7,526 0 0 5 7,576 0 0 5

InIND-MTRMTR-B330-1 535 0 0 0 532 0 0 0

InCABLECBL-P1009B 7,132 0 0 5 7,086 0 0 5 5

BUS-0066 1,496 0 0 5 1,496 0 0 5

InIND-MTRMTR-605F001 106 0 0 0 106 0 0 0

InCABLECBL-P1011AB 1,466 0 0 5 1,466 0 0 5 5

BUS-0067 774 0 0 5 774 0 0 5

InIND-MTRMTR-605F002 106 0 0 0 106 0 0 0

InCABLECBL-P1012AB 745 0 0 5 745 0 0 5 5

BUS-0068 15,100 0 0 5 16,305 0 0 5

InCABLECBL-P2009B 555 0 0 0 514 0 0 0

InVFD-B330-2 15,766 0 0 5 14,601 0 0 5 5

BUS-0069 6,509 0 0 5 6,539 0 0 5

InIND-MTRMTR-B330-2 534 0 0 0 532 0 0 0

InCABLECBL-P2009B 6,108 0 0 5 6,079 0 0 5 5

BUS-0070 1,248 0 0 5 1,248 0 0 5

InIND-MTRMTR-605F003 106 0 0 0 106 0 0 0

InCABLECBL-P2011AB 1,219 0 0 5 1,219 0 0 5 5

BUS-0071 922 0 0 5 922 0 0 5

InIND-MTRMTR-605F004 106 0 0 0 106 0 0 0

InCABLECBL-P2012AB 893 0 0 5 893 0 0 5 5

BUS-0109 11,708 0 0 5 12,933 0 0 5

InCABLECBL-P4004A 116 0 0 0 105 0 0 0

InVFD-F301A 12,819 0 0 5 11,604 0 0 5 5

BUS-0110 1,871 0 0 5 1,871 0 0 5

InIND-MTRMTR-F301A 106 0 0 0 106 0 0 0

InCABLECBL-P4004A 1,836 0 0 5 1,836 0 0 5 5

BUS-0111 5,886 0 0 5 5,886 0 0 5

InIND-MTRMTR-F301B 106 0 0 0 106 0 0 0

InCABLECBL-P4005A 5,821 0 0 5 5,821 0 0 5 5

BUS-0112 5,104 0 0 5 5,104 0 0 5

InIND-MTRMTR-F301C 106 0 0 0 106 0 0 0

InCABLECBL-P4006A 5,044 0 0 5 5,044 0 0 5 5

BUS-0113 11,708 0 0 5 12,936 0 0 5

2

Short Circuit Current Rating

Evaluation

Device Evaluation Comprehensive Bus Report

Project: Washington

Connected Bus StatusBus

Voltage

Calc

Int kADevName

Int

Rating %

Frame

Voltage

Calc

Mom kA

Mom

Rating %

Series

Rating

Dev

Int kA

Dev

Mom kAFrame/Trip

BUS-52G-1 Pass 480 12.61PD-52-G 508 6.30 50.01,600

BUS-52U-1 Pass 480 36.93PD-52-U 508 18.46 50.01,600

BUS-MAIN Pass 480 36.92PD-52-1 508 18.46 50.01,600 / 800

Pass 480 36.92PD-52-2 508 18.46 50.01,600 / 800

Pass 480 36.92PD-52-3 508 18.46 50.01,600 / 800

Pass 480 36.92PD-52-4 508 18.46 50.01,600 / 800

BUS-MCC-1E Pass 480 69.29PD-1E/1H 480 17.32 25.015

Pass 480 26.65PD-1E/2A 480 17.32 65.050

Pass 480 26.65PD-1E/2C 480 17.32 65.050

Pass 480 26.65PD-1E/2E 480 17.32 65.030

Pass 480 26.65PD-1E/2G 480 17.32 65.015

Pass 480 69.29PD-1E/3F 480 17.32 25.060

Pass 480 49.49PD-1E/3H 480 17.32 35.0150

Pass 480 49.49PD-1E/3J 480 17.32 35.0150

Pass 480 26.65PD-1E/4A 480 17.32 65.050

Pass 480 49.49PD-1E/5A 480 17.32 35.0400

Pass 480 26.65PD-1E/5E 480 17.32 65.050

BUS-MCC-1NE Pass 480 69.22PD-1NE/1C 480 17.30 25.050

Pass 480 69.22PD-1NE/1D 480 17.30 25.040

1

leah.aston

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Connected Bus StatusBus

Voltage

Calc

Int kADevName

Int

Rating %

Frame

Voltage

Calc

Mom kA

Mom

Rating %

Series

Rating

Dev

Int kA

Dev

Mom kAFrame/Trip

BUS-MCC-1NE Pass 480 26.62PD-1NE/1E 480 17.30 65.0100

Pass 480 26.62PD-1NE/2A 480 17.30 65.0100

Pass 480 26.62PD-1NE/2K 480 17.30 65.040

Pass 480 26.62PD-1NE/3A 480 17.30 65.040

BUS-MCC-2E Pass 480 26.65PD-2E/2A 480 17.32 65.050

Pass 480 26.65PD-2E/2C 480 17.32 65.060

Pass 480 26.65PD-2E/2E 480 17.32 65.030

Pass 480 26.65PD-2E/2K 480 17.32 65.020

Pass 480 49.49PD-2E/3A 480 17.32 35.0150

Pass 480 69.29PD-2E/3D 480 17.32 25.070

Pass 480 49.49PD-2E/3F 480 17.32 35.0150

Pass 480 26.65PD-2E/4G 480 17.32 65.050

Pass 480 49.49PD-2E/5A 480 17.32 35.0400

Pass 480 26.65PD-2E/5G 480 17.32 65.050

BUS-MCC-2NE Pass 480 69.22PD-2NE/1C 480 17.31 25.050

Pass 480 69.22PD-2NE/1D 480 17.31 25.040

Pass 480 26.62PD-2NE/1E 480 17.31 65.0100

Pass 480 26.62PD-2NE/2A 480 17.31 65.0100

Pass 480 26.62PD-2NE/2K 480 17.31 65.040

Pass 480 26.62PD-2NE/3A 480 17.31 65.040

BUS-MCC-3 Pass 480 69.36PD-3/1E 480 17.34 25.015

Pass 480 69.36PD-3/1G 480 17.34 25.015

Pass 480 69.36PD-3/1J 480 17.34 25.025

Pass 480 69.36PD-3/2C 480 17.34 25.080

Pass 480 69.36PD-3/2F 480 17.34 25.060

2

Arc Flash Study Results

Arc Flash Evaluation Report

Arc Flash Evaluation Study Options

IEEE 1584Standard: seconds

English

Max Arcing Duration: 2.0

Unit: Include Transformer Phase Shift: Yes

Define Grounded as SLG/3P Fault >= : 5.0 %

------------------------------------------------------- Flash Boundary Calculation Adjustment Option -------------------------------------------------------

For voltage above 1 kV and trip time <= 0.1s, use 1.5 cal/cm^2 *(6.276 J/cm^2) for flash boundary calculation.

Report Bus Results

-------------------------------------------------------- Fuse Current Limiting Option --------------------------------------------------------------

Specify fuses as current limiting in the protective device library, manufacturer’s equipment-specific Incident Energy equations will be used if available.

------------------------------------------------------- Report Option -----------------------------------------------------------------

Clear Fault Threshold: %80

NoCheck Upstream Miscoordination:

Report calculated incident energy from equation

------------------------------------------------------- Incident Energy Report Option for Equipment Below 240 V -------------------------------------------------------

------------------------------------------------------- Generator and Synchronous Motor Decay Option -------------------------------------------------------

------------------------------------------------------- Induction Motor Decay Option -------------------------------------------------------

Include induction motors for 5 cycles.

Report main device

Project: Washington

Base Project

leah.aston

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Working

Distance

(in)

Equip

Type

Breaker

Opening

Time

(sec.)

Trip/

Delay

Time

(sec.)

Protective

Device Name

Incident

Energy

(cal/cm2)

ArcFlash

Boundary

(in)

Bus Name Bus

Bolted

Fault

(kA)

Bus

Arcing

Fault

(kA)

Required Protective

FR Clothing Category

Prot

Bolted

Fault

(kA)

Prot

Arcing

Fault

(kA)

Gap

(mm)

Bus

kV

0.016PD-3/4JR 0.22 6.44 18.00

0.480 4.80 4.80 3.50 3.50 PNL 25 0.000 Category 0 - Nonmelting,

Flammable Materials with Weight

>= 4.5 oz/sq yd

BUS-3/4JR

2.000PD-52-G 32.85 135.60 18.00

0.480 5.77 5.77 4.10 4.10 PNL 25 0.000 Category 4 - Arc-rated FR Shirt &

Pants & Arc Flash Suit

BUS-52G-1

2.000PD-52-U 82.56 237.78 18.00

0.480 15.54 18.47 11.08 9.55 PNL 25 0.000 Category Dangerous! - No FR

Category Found

BUS-52U-1

0.017PD-3/2H 0.18 5.69 18.00



>= 4.5 oz/sq yd

BUS-600CR003

0.018PD-3/2C 0.17 5.56 18.00



>= 4.5 oz/sq yd

BUS-600RTU001

0.018PD-3/2G 0.17 5.40 18.00



>= 4.5 oz/sq yd

BUS-600RTU002

0.038PD-1NE/1D 0.15 5.03 18.00



>= 4.5 oz/sq yd

BUS-605CR001

0.336PD-2NE/1D 1.01 16.28 18.00



>= 4.5 oz/sq yd

BUS-605CR002

0.012PD-1E/3H 0.22 6.44 18.00



>= 4.5 oz/sq yd

BUS-605GH001

0.015PD-2E/3F 0.22 6.39 18.00



>= 4.5 oz/sq yd

BUS-605GH002

0.017PD-1NE/2K 0.19 5.81 18.00



>= 4.5 oz/sq yd

BUS-605SH001

0.017PD-1NE/3A 0.19 5.81 18.00



>= 4.5 oz/sq yd

BUS-605SH002

Page 2

Working

Distance

(in)

Equip

Type

Breaker

Opening

Time

(sec.)

Trip/

Delay

Time

(sec.)

Protective

Device Name

Incident

Energy

(cal/cm2)

ArcFlash

Boundary

(in)

Bus Name Bus

Bolted

Fault

(kA)

Bus

Arcing

Fault

(kA)

Required Protective

FR Clothing Category

Prot

Bolted

Fault

(kA)

Prot

Arcing

Fault

(kA)

Gap

(mm)

Bus

kV

0.019PD-2NE/2K 0.14 4.93 18.00



>= 4.5 oz/sq yd

BUS-605SH003

0.021PD-2NE/3A 0.13 4.71 18.00



>= 4.5 oz/sq yd

BUS-605SH004

0.218PD-52-G 3.58 35.13 18.00


Pants

BUS-ATS001-E

0.218PD-52-U 9.52 63.76 18.00


Pants & Arc Flash Suit

BUS-ATS001-N

0.015PD-1E/2G 0.28 7.43 18.00



>= 4.5 oz/sq yd

BUS-ISO1-PRI

1.615PD-1E/2G 0.56 12.33 18.00



>= 4.5 oz/sq yd

BUS-ISO1-SEC

0.015PD-2E/2K 0.27 7.29 18.00



>= 4.5 oz/sq yd

BUS-ISO2-PRI

1.307PD-2E/2K 0.45 11.09 18.00



>= 4.5 oz/sq yd

BUS-ISO2-SEC

0.015PD-3/3H 0.34 8.36 18.00



>= 4.5 oz/sq yd

BUS-ISO3-PRI

1.521PD-3/3H 0.55 12.20 18.00



>= 4.5 oz/sq yd

BUS-ISO3-SEC

2.000PD-1E/3F 7.67 55.87 18.00


Pants

BUS-LP1

2.000PD-2E/3D 7.67 55.87 18.00


Pants

BUS-LP2

Page 3

Time Versus Current Curve

Plots

SAMPLE ELECTRICAL DISTRIBUTION ONE-LINE DIAGRAM

SHEET:

CHECKED BY:

DRAWN BY:

DATE:

JOB No:

RE

V. B

Y:

RE

V:

DA

TE

:D

ES

CR

IP

TIO

N

CO

PY

RIG

HT

~

K

RE

CH

O

JA

RD

&

A

SS

OC

IA

TE

S :

c

RE

GIO

NA

L O

FF

IC

E

& A

SS

OC

IA

TE

S, IN

C.

22

7 W

ES

T F

IR

ST

S

TR

EE

T, S

UIT

E 200

DU

LU

TH

, M

IN

NE

SO

TA

55802

Ph

: 218.7

27.3282

Fx

: 218.72

7.1216

ww

w.k

rech

ojard

.co

m

1901 N

. M

OU

NT

AIN

R

OA

D

WA

US

AU

, W

I 54

401

Ph

: 715.849

.3980

Fx

: 715.298

.3887

MA

IN

O

FF

IC

E

13P164

03.13.2013

LJA

KJK

FA

CIL

IT

Y N

AM

E

FA

CIL

IT

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OC

AT

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N

EL

EC

TR

IC

AL

D

IS

TR

IB

UT

IO

N O

NE

-L

IN

E D

IA

GR

AM

AR

C F

LA

SH

P

RO

PO

SA

L

AS

AM

PL

EL

JA

SHEET:

CHECKED BY:

DRAWN BY:

DATE:

JOB No:

RE

V. B

Y:

RE

V:

DA

TE

:D

ES

CR

IP

TIO

N

CO

PY

RIG

HT

~

K

RE

CH

O

JA

RD

&

A

SS

OC

IA

TE

S :

c

RE

GIO

NA

L O

FF

IC

E

& A

SS

OC

IA

TE

S, IN

C.

22

7 W

ES

T F

IR

ST

S

TR

EE

T, S

UIT

E 200

DU

LU

TH

, M

IN

NE

SO

TA

55802

Ph

: 218.7

27.3282

Fx

: 218.72

7.1216

ww

w.k

rech

ojard

.co

m

1901 N

. M

OU

NT

AIN

R

OA

D

WA

US

AU

, W

I 54

401

Ph

: 715.849

.3980

Fx

: 715.298

.3887

MA

IN

O

FF

IC

E

13P164

03.13.2013

LJA

KJK

FA

CIL

IT

Y N

AM

E

FA

CIL

IT

Y L

OC

AT

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N

MC

C O

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IN

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IA

GR

AM

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P

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AS

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rech oard & associates -...

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