sh5265 Final.pdf

POWER SYSTEMS ENGINEERING

2365 Harrodsburg Road, Suite B325

Lexington, KY 40504

(859) 296-3600

May 5, 2006 Mr. Khim Chudasama (183A) Department of Veteran Affairs 811 Vermont Avenue NW Room 478 Washington, DC 20420

Subject: Final Copies of Power System Studies and Site Assessment Department of Veterans Affairs Medical Center Boise, ID

Dear Mr. Chudasama:

Attached is one (1) final copy of the subject studies and site assessment.

These attached final copies also include a CD containing a copy of the entire study in textual format that can be reproduced on standard letter sized paper or larger as required for the CAD one-line drawings. Included on the CD is a backup copy of the SKM Power Tools software model from which the study was derived and a text of detailed instructions to facilitate use of the various files.

This final study contains revisions per draft study comments received on March 17th and March 28th from Boise and Washington DC, respectively. Responses to the comments received have been listed on the next two (2) pages. The final report is submitted in a large ring binder (or binders) tabulated in accordance with the Table of Contents.

We thank you for the opportunity to provide this study and for the support given us by the VA staff while on site. If we can be of any further assistance to you on this project please do not hesitate to contact us.

Sincerely, Steve Hinton, PE Senior Application Engineer – Power Systems Engineering c.c. Patrick Flanagan – Department of Veterans Affairs Medical Center – Boise, ID Jon Clough – Square D – Spokane, WA Rusty House – Square D – Portland, OR

In response to the comments received from Washington DC and Boise, March 28 & March 17, respectively, the following items were addressed in the final study submitted in May:

1. The final study books and CD’s have been updated.

2. The utility letter is in the reference section of the report.

3. Sections 7.2, 7.4, & 7.5 now contain all the necessary building numbers.

4. The photo section of the report has been corrected (previously missing pictures and text).

5. GSA pricing was used for the cost estimate section.

6. The assumed items on the one-line diagrams were made to protect Square D personnel. A shutdown would be needed to properly gather the data.

7. Transformer X/R ratios are based on ANSI/NEMA standards – these are not typically shown on nameplates.

8. The generator KW/KVA ratings for the units in question (drawings D-ML-05-265-5, D-ML-05-265-7, & D-ML-05- 265-10) were obtained from their own alternator data sheets by Cummins and Onan which were discovered during the on-site data collection visit. Alternator data sheet information was used for the study.

9. Building numbers for all transformers have been removed and only the T# designations are listed on the one-lines.

This is a direct result of only noticing T# designations in the field.

10. Drawing 1: Normal Feeder and Emergency Feeder have been added to one-line D-ML-05-265-1.

11. Drawings 1 & 9: PNL-T3 turned out to be an outdoor panelboard interior mounted inside transformer T3.

12. Drawings 2 & 3: T21, per field data collected, is rated 150KVA 208Y/120V; not 167 KVA single phase.

13. Drawing 5: Panel EHV2 was not known about during the site visit nor was it shown on the contract drawings used to determine scope. If this panel is part of the system a purchase order will be required based on an amount to be determined in order to update the study.

14. Drawing 7: Transformer T13 (feeds panel G2) was not known about during the site visit nor was it shown on the contract drawings used to determine scope. If this panel is part of the system a purchase order will be required based on an amount to be determined in order to update the study.

15. Drawing 8: PNL-3 (Building 115) has additional information included now. Calculations were not made down to it because there are no branch breakers feeding load. However, it should be noted, the results for panel 4 in building 15 could be considered identical to panel 3 due to a difference in cable length of only 2 feet.

16. Drawing 9: Chiller (CH-1) shows 500kcmil (line side of the 400A SW) and 2-#3/0 (load side of the 400A SW) per the field collected data (a photo exists of the line and load side cables connected to the switch).

17. Drawing 9: Chiller (CH-2) was found to be a future chiller at the time of the site visit and subsequent study. If this chiller is part of the system now a purchase order will be required based on an amount to be determined in order to update the study.

18. The following equipment designations represent what was found during the on-site data gathering effort in September 2005. Equipment will be shown in the study based on what was found. If the designations are changed in the field to match the desired ones listed, then a purchase order is required based on an amount to be determined in order to update the study.

DRAWING

NUMBER

AS FOUND

DESIGNATION

DESIRED VA

DESIGNATION

D-ML-05-265-4 MBPBBB11X MBP

D-ML-05-265-6 RTU-1A AHU-2

D-ML-05-265-6 85AE-1 85AE1

D-ML-05-265-6 85AE-2 85AE2

D-ML-05-265-7 Supply Fan #2 AHU-2

D-ML-05-265-7 ES E33

D-ML-05-265-8 MTS-2 MTS-1

D-ML-05-265-10 46-P1 P-HWHS-1

D-ML-05-265-10 46-P2 P-HWHS-2

D-ML-05-265-10 46-P3 P-HWHS-3

D-ML-05-265-10 45-P5 P-GEO-2

D-ML-05-265-10 45-P4 P-GEO-1

2365 Harrodsburg Road, Suite B325

Lexington, KY 40504

(859) 296-3600

SHORT-CIRCUIT ANALYSIS,

VOLTAGE DROP ANALYSIS,

OVERCURRENT DEVICE COORDINATION ANALYSIS,

ARC FLASH HAZARD ANALYSIS,

SITE ASSESSMENT

Department of Veterans Affairs Medical Center

Boise, ID

Prepared by Steve Hinton, PE

Power Systems Engineer, Square D

Site Assessment by Jonathan Clough, PE

Power Systems Engineer, Square D

ML #: 5265

SQUARE D Q2C #: 20745032-011, -027, -033, -037

ISSUED: May 5, 2006

FILE: sh5265 Final.doc or sh5265 Final.pdf

TABLE OF CONTENTS

The following power systems engineering report was prepared by Square D Engineering Services utilizing industry-accepted standards, practices, methodologies, and analysis tools. Inputs to the analysis include data obtained by Square D and provided by others, through onsite discovery activities, published information, equipment nameplates, manufacturer ratings, testing, analysis, or other means. The study is intended for use by qualified individuals to facilitate the installation, operation, maintenance, and safety of the electrical power system depicted. Modification of equipment, changes to system configuration, adjustment of trip-unit settings, or failure to properly maintain equipment may invalidate these results.

1 ABBREVIATIONS AND TRADEMARKS

2 EXECUTIVE SUMMARY

2.1 Introduction

2.2 Power System Engineer

2.3 Study Scope

2.4 Study Source Data

2.5 Study One-Line Diagram

2.6 Study Assumptions

2.7 SUMMARY

3 SHORT-CIRCUIT ANALYSIS

3.1 General Procedure

3.2 Data Used in the Calculations

3.2.1 Power Company Data

3.2.2 Generator Data

3.2.3 Cable Data

3.2.4 Transformer Data

3.2.5 Motor Contribution to Short-Circuit Current

3.3 Analysis of Results and Recommendations

3.4 Short-Circuit Comparison Tables

4 VOLTAGE DROP ANALYSIS

4.1 General Procedure

4.2 Data Used in the Calculations

4.3 Analysis of Results

5 OVERCURRENT DEVICE COORDINATION ANALYSIS

5.1 General Procedure

5.2 Specific Procedure

5.2.1 Short-Circuit Current Considerations

5.2.2 Molded Case Breaker Coordination

5.2.3 Fuse Coordination

5.2.4 Time-Overcurrent Relay Coordination

5.2.5 Motor Control Center Instantaneous Trip Breakers

5.2.6 Low-Voltage Ground Fault Relay Settings

5.2.7 Transformer Protective Devices

5.2.8 Cable Protection

5.2.9 Generator Protection

5.3 Analysis of Results and Recommendations

May 2006

5.4 Overcurrent Device Setting Tables

5.5 Time-Current Coordination Graphs

6 ARC FLASH HAZARD ANALYSIS

6.1 General Procedure

6.2 Specific Procedure

6.3 Analysis of Results

6.4 Table Headings Guide

6.5 Arc Flash Hazard Analysis – Summary Tables

7 SITE ASSESSMENT

7.1 General Procedure

7.2 General Discussion

7.3 Codes and Safety

7.4 Equipment Age and Condition

7.5 Equipment Maintenance

7.6 Metering

7.7 Miscellaneous

8 CORRECTIVE ACTION – COST ESTIMATES

APPENDICES

APPENDIX A: SHORT-CIRCUIT COMPUTER INPUT TABULATIONS

APPENDIX B: SHORT-CIRCUIT COMPUTER OUTPUT TABULATIONS

APPENDIX C: VOLTAGE DROP INPUT DATA

APPENDIX D: VOLTAGE DROP OUTPUT DATA

APPENDIX E: REFERENCES

APPENDIX F: SYSTEM ONE-LINE DIAGRAMS..............IN BACK POCKET

1 ABBREVIATIONS AND TRADEMARKS

Organizations and Standards ANSI - American National Standards Institute IEEE - Institute of Electrical and Electronics Engineers IPCEA - Insulated Power Cable Engineers Association NEC - National Electrical Code (NFPA No. 70) NEMA - National Electrical Manufacturers Association UL - Underwriters' Laboratories, Inc.

Other Abbreviations A - Amperes (RMS symmetrical) AFIE - Arc Flash Incident Energy (cal/cm2) AIC - Amperes Interrupting Capacity (Three-Phase RMS sym.)

ASD - Adjustable Speed ac Drive ATPV - Protective Clothing Arc Rating ATS - Automatic Transfer Switch C/B - Circuit Breaker CHP - Combined Horsepower CFLA - Combined Full Load Amperes CT - Current Transformer FLA - Full Load Amperes FPB - Flash Protection Boundary HP - Horsepower IL - Max. Demand Load Current at PCC ISC - Short-Circuit Current at PCC kVA - Kilovolt-Ampere kVAm - Kilovolt-Amperes of Motor Short Circuit contribution kW - Kilowatt L-L - Line-To-Line LRA - Locked-Rotor Amperes L.V. - Low Voltage MCC - Motor Control Center MCS - Molded Case Switch Mohms - Milliohms M.V. - Medium Voltage O.L. - Overload PCC - Point of Common Coupling PF - Power Factor PPE - Personal Protective Equipment PWM - Pulse Width Modulated R - Resistance RMS - Root-Mean-Square SCA - Short-Circuit Amperes SCAm - Short-Circuit Amperes of Motor Contribution S.F. - Service Factor sym. - Symmetrical TCR - Trip Current Rating TDD - Total Demand Distortion THD - Total Harmonic Distortion V - Line-To-Line Volts (RMS sym.)

WCR - Withstand Current Rating X - Reactance Z - Impedance %Z - Percent Impedance

Trademarks BOLT-LOC, ECONOPAK, EZ METER-PAK, GROUND CENSOR, I-LIMITER, I-LINE, ISO-FLEX, MAG-GARD, MICROLOGIC, MINI POWER-ZONE, OMEGAPAK, POWER-CAST, POWER STYLE, POWER ZONE, QF, QO, QWIK-GARD, SORGEL, SPEED-D, SQUARE D, VACARC and WATCHDOG are registered trademarks of Square D Company. I-75,000, METER-PAK, and PZ-8 are trademarks of Square D Company.

Company Abbreviations

Allen-Bradley A-B Allis-Chalmers A-C ASEA Brown Boveri ABB Automatic Switch Co ASCO Basler BAS Bussmann BUSS Challenger CHA Cooper COOP Cutler – Hammer C-H Economy Fuse ECON Federal Pacific Electric FPE G & W Electric G&W General Electric GE Gould Shawmut GS I-T-E Imperial ITE Kearney KEA Klockner KLO Littlefuse LIT McGraw Edison ME Merlin Gerin MG Powell POW Reliance REL RTE Corp. RTE Russelectric RUSS S & C Electric S&C Schweitzer Engr. Labs SEL Siemens SIE Square D SQD Thomas Bettis T-B Toshiba TOS Westinghouse WEST Zenith Z

2 EXECUTIVE SUMMARY

2.1 Introduction

This report documents the results of a Square D Power Systems analysis for the Department of Veterans Affairs Medical Center in Boise, ID. All studies were performed using the Power*Tools for Windows Software published by SKM Systems Analysis of Manhattan Beach, CA, version 5.0.3.2.

Data was obtained from the sources listed in the "REFERENCE" section at the end of the report.

The system short-circuit analysis evaluates the adequacy of new Square D and/or existing facility electrical equipment shown on the enclosed one-line diagrams to withstand or to interrupt the calculated maximum available short-circuit current at its location.

This report supersedes the results from any other previous Square D study.

The voltage drop analysis evaluates the level of voltage drop at each point in the system as compared to that allowed by the National Electric Code.

The overcurrent device time-current coordination analysis determines the suggested settings and, where appropriate, the ampere ratings and types for the electrical power system protective devices to achieve the desired system protection and electrical service continuity goals.

The flash hazard analysis establishes the flash protection boundary around electrical equipment within which a worker exposed to an arcing fault would expect to receive 2nd degree burns if not adequately protected. The analysis also determines the incident energy levels at specific working distances from equipment, which can be used to select appropriate personal protective equipment (PPE) to be worn when working within the flash protection boundary.

2.2 Power System Engineer

Steve Hinton, PE is a registered professional engineer in the Commonwealth of Kentucky and Pennsylvania, license numbers 22367 and PE072638, respectively. Mr. Hinton is a senior application engineer with the Schneider Electric / Square D Power Systems Engineering department located in Lexington, KY. He has been employed by Square D for the past 8 years having provided application of low and medium voltage products as well as large project development of power system studies. He has a BSEE (1997) from University of Kentucky in Lexington, Kentucky. Phone: (859) 296-3624 or email at steve.hinton@us.schneider-electric.com

The Square D Power Systems Engineering group was formed in 1966. Since it’s inception, the group has completed over 5,000 system studies for clients throughout the world. The primary focus of this work centers on short-circuit, time-current coordination, arc flash, load flow, voltage drop, and motor starting analyses.

2.3 Study Scope

The scope of this report is limited to that equipment shown on the study one-line diagrams. The study reviews electrical equipment starting at the 12.47kV utility source down to significant low voltage panels and other various pieces of equipment.

2.4 Study Source Data

Existing system design information was obtained from several generations of previous one-line diagrams (not up to date) provided by the Dept of Veterans Affairs (VA). The VA also provided various electrical system information. Up to date one-line verification along with equipment and cable data was obtained from a field survey performed by the Square D Engineering Services Organization.

2.5 Study One-Line Diagram

Study one-line diagrams at the end of this report are computer generated from the source documents. Only details that are essential to this study are included on these diagrams. A reasonable attempt was made to confirm all essential information.

2.6 Study Assumptions

1. All ATS switches are to be closed in the normal source mode, as fault current is highest when served from the utility or normal source versus standby generator sources.

2. Where conductor run lengths could not be determined, a conservative length of 5 or 10 feet was estimated for feeder taps and 10 feet was assumed for all other feeders. These estimates are also noted on the one-line diagrams.

3. Where conductor sizes could not be determined, assumed cable sizes per NEC 2005 Edition table 310.16 were used in the analysis.

4. All DC elevators were modeled as induction motors due to software limitations. The rated full load current was manually calculated for each DC elevator. Then, the calculated full load currents were converted to equivalent induction motor HP ratings. For fault analysis, these motors only contribute about one times their rated full load current during a fault. Refer to report section 3.2.5, Motor Contribution To Short-Circuit Current, for a brief discussion regarding motor contribution.

5. Equivalent ampacity Square D busway impedance values were utilized for all busway runs modeled.

6. For low-voltage circuit breakers where the adjustable setting(s) was undeterminable, the proposed setting(s) was used.

7. For the voltage drop analysis, low-voltage load currents (including motor loads) are applied at each panel and control center that result in a total current that is never greater than 100% of the 15KV SWGR main circuit breaker’s primary CT rating. In some cases, where the total load possible appears greater than 100% of the transformer FLA, a service factor was applied evenly to each feeder in order to derive the total FLA value.

8. Most of the primary transformer fuses were assumed, as noted on the one-lines, due to not being able to place the fused switches in electrically safe working conditions.

9. Subtransient reactances were assumed for four of the six generators and are noted on the one-line diagrams.

2.7 SUMMARY

Significant recommendations and/or numbered action items by this study and site assessment are listed below.

Per Report Section 3.3 (Short-Circuit)

The results of the short-circuit analysis show that most of the equipment considered in the study is adequately rated for the projected fault current levels. For further discussion regarding these results, please refer to the Short Circuit Analysis of Results and Recommendations.

1. Replace Building 85 service entrance gear to meet higher fault current levels. Refer to buses

309 and 311.

2. Replace ATS-2, ATS3, & ATS5 to meet higher fault current levels. Refer buses 332, 358, & 386.

3. Replace or upgrade all panels listed “INADEQUATE” in tables in section 3.4 of the report.

4. Field verify equipment that may have short-circuit current ratings for the items shown as #N/A in the short-circuit comparison table notes column.

Per Report Section 5.3 (Time-Current Coordination)

The coordination study showed that for the most part, a high degree of selectivity was achieved among devices in the system except for the TCC’s discussed in section 5.3. Recommended setting levels are provided in the Overcurrent Device Setting Tables. Where changes to existing settings are recommended, either to improve coordination or reduce arc flash incident energy levels, entries are given in the setting table showing both the existing and recommended device settings.

The breakers and relays in the system should be set to the recommended levels. For further discussion regarding these results, please refer to the Time Current Coordination Analysis of Results and Recommendations.

1. Change cable/breaker sizes in violation of NEC 240.3. These items can be found in section

5.3 of the report.

2. Review feeder taps per NEC 240.21, and make modifications accordingly. These items are also outlined in section 5.3 of the report.

3. Change settings on overcurrent devices from existing to proposed, per the tables in section 5.4 of the report as long as NEC requirements are met.

4. Several time-current coordination graphs are discussed in section 5.3. These should be reviewed and changes implemented if found necessary.

Per Report Section 6.4 (Arc Flash)

The results of the arc flash analysis show both the calculated arc flash incident energy (AFIE) and flash protection boundary distances at each bus under study. Note that in some locations, more than one value for AFIE levels and/or the flash protection boundary are given (e.g., one for the main section and one for the feeder sections of a switchgear lineup) to reflect different zones of protection for a given piece of equipment. Equipment warning labels or safety programs should take these variations in energy levels and flash protection boundaries into account.

For buses that represent low-voltage switchboards or panelboards, the values shown in the Arc Flash Hazard Analysis – Summary Tables assume that the fault is cleared by the upstream protective device, even if the equipment contains a main overcurrent protective device. This assumption is intended to produce conservative results and therefore cover the case where faults originating in such equipment may propagate to the line side of the local main. See the Arc Flash General Procedure and Arc Flash Specific Procedure for additional details regarding the analysis procedure.

Where protective device settings changes were recommended in order to reduce arc flash levels in the system, the values reported are based on the implementation of these revised settings.

Additional discussion of buses with incident energy greater than 40 cal/cm2 (in the “bus calculation”) is given in the Arc Flash Analysis of Results. Note that while PPE with arc ratings of up to 112 cal/cm2 is commercially available, NFPA 70E-2004 does not define protective clothing classes or intend for work to be performed at locations having incident energies above 40 cal/cm2 (Category 4). Due to the increased risk of non-burn injuries (e.g., concussions, hearing damage, or other internal injuries) at such high-energy locations, Square D does not recommend energized work at any location with an available AFIE greater than 40 cal/cm2.

Note that the arc flash hazard analysis and recommended PPE levels are no substitutes for safe work practices. As stated in 130.7(C)(10), FPN 2 of NFPA 70E-2004, burn injuries can occur even when adequate PPE is employed, and the recommended PPE may provide little or no protection against arc blast and its effects. Protection from arc flash can best be provided by working only on circuits or equipment that have been placed in an electrically safe work condition.

1. Equipment listed “****Dangerous!!! No Cat. Number Found” should only be worked on when the bus/equipment is de-energized.

Per Report Section 7 (Site Assessment)

The results of the site assessment show numerous equipment assessment issues. In general, a range of corrective action is recommended due to the age, condition or electrical rating of some equipment.

1. To summarize the entire section would detract its valuable content. It is recommended the entire site assessment be reviewed and an action plan be implemented as soon as possible.

2. A ground study, which is out of the scope of this project, could be performed to determine if the 1000KW generator could be better grounded and/or protected.

3 SHORT-CIRCUIT ANALYSIS

3.1 General Procedure

An electrical system short-circuit analysis is used for the following:

1) To compare the calculated maximum fault current with the interrupting ratings of overcurrent protective devices such as fuses and circuit breakers.

2) To investigate applicable short-circuit series ratings and the protection of electrical equipment by current-limiting devices.

3) To verify the adequacy of other equipment (such as transformers, switches, equipment bussing) to withstand the effects of the calculated maximum fault current levels.

4) To assist in the selection and/or determination of settings for relays, fuses and circuit breakers.

5) To provide input (along with device trip characteristics) to an arc-flash hazard analysis.

This analysis was made utilizing SKM Power Tools software. The software was programmed to calculate the maximum available three-phase, RMS symmetrical, short-circuit amperes at each piece of equipment in the system. The calculation procedures are based on recommendations included in ANSI/IEEE standards C37.13, C37.010, and C37.5.

The AFAULT module of the Power*Tools software simulates a bolted three-phase fault at each point of consideration in the system and calculates the maximum available short-circuit current at that point without any reduction due to current-limiting overcurrent devices which may be present.

(However, the effects of current-limiting devices are considered when determining the adequacy of the equipment.) The calculated short-circuit values are RMS symmetrical amperes and are comparable with the RMS symmetrical short-circuit ratings of electrical equipment.

Electrical distribution equipment must be able to withstand and/or interrupt the most severe fault duty that it may be subjected to at its location in the system. In particular, NEC Section 110.9 requires circuit breakers to have a rating sufficient for interrupting the maximum available fault current present at their line side terminals. For locations where calculated fault currents exceed the ratings of the equipment, recommendations for corrective actions are provided.

Equipment short-circuit withstand and interrupting ratings are expressed in symmetrical RMS current. However, fault currents are not purely symmetrical in practice, as system inductance introduces a degree of asymmetry for at least the first few cycles of a fault. The magnitude and duration of this asymmetrical component depends on several factors, including characteristics of system components (conductors, transformers, and loads) and the exact point on the current waveform that the fault begins—the level of asymmetry even differs from phase to phase in a three-phase system. Because of the uncertainty in asymmetry for a given fault event, the capability of devices to interrupt asymmetrical fault current is based on the maximum possible asymmetrical fault current level at the point of application. The more inductive the circuit, as measured by the calculated system X/R ratio, the more asymmetrical the fault current can be. If the calculated X/R level exceeds a certain level, then the increased asymmetrical duty must be taken into account when breaker ratings are assessed.

Low-voltage circuit breakers and fuses are tested to establish their interrupting ratings based on a circuit with a fixed X/R ratio, as defined in the various product standards (UL and ANSI). For example, an ANSI low-voltage power circuit breaker is tested in a circuit with an X/R ratio of 6.6.

If such a breaker is applied at a system bus with a calculated X/R ratio of 6.6 or less and the calculated RMS symmetrical fault current is within the symmetrical interrupting rating of the breaker, then it is assumed that the breaker is also able to interrupt and withstand the asymmetrical current resulting from a fault at that location. If a low voltage breaker is applied at a location with an X/R ratio greater than that of the design test circuit, the calculated fault current must be multiplied by an adjustment factor that accounts for this. This resultant “fault duty,” which is greater than the calculated fault current, is then compared to the breaker’s interrupting rating in order to determine if the breaker is adequately rated. Different classes of low-voltage breakers have different test X/R values, and each type has its own set of multiplication factors. Design test circuit power factors and associated X/R ratios are as shown in the Table below. The SKM low-voltage short-circuit output report shows the calculated fault duty levels calculated at each bus, and when these values differ from the calculated short-circuit current levels, they are used in the device comparison tables. See IEEE 1015-1997, IEEE Recommended Practice for Applying Low- Voltage Circuit Breakers Used in Industrial and Commercial Power Systems, for additional details.

Device pf X/R Ratio

Power circuit breaker, unfused 0.15 6.591 Power circuit breaker, fused 0.20 4.899

Molded case breaker, interrupting rating greater than 20000 A 0.15-0.20 6.591-4.899

Molded case breaker, interrupting rating 10001 to 20000 A 0.25-0.30 3.9-3.18

Molded case breaker, interrupting rating 10000 A and less 0.45-0.50 2.0-1.732

Table: Summary of Test Power Factor and X/R Values for LV Devices.

For power circuit breakers, the power factors are taken from ANSI/IEEE C37.13. For molded case breakers, the power factors are taken from NEMA standard AB1. Since the NEMA standard specifies a range of test circuit power factors, the highest value (lowest X/R ratio) is used to determine the multiplying factor. This produces the most conservative (largest) factor.

The included one-line diagrams are a simplified version of the engineer's drawings, showing only those parts of the electrical system under consideration. The various circuit locations on the diagrams have been labeled with bus identification numbers (enclosed in squares) so input data could be supplied to the computer and the computer output could be readily interpreted.

3.2 Data Used in the Calculations

3.2.1 Power Company Data

The VA Medical Center in Boise, Idaho is fed by one utility feeder at 12.47KV. Idaho Power Co has advised that their system is capable of delivering a maximum available three-phase short-circuit current of 2,092A at 12.47kV with an X/R ratio of 1.06. These values determined the starting point for the short-circuit analysis.

3.2.2 Generator Data

The emergency generation system is shown on drawings D-ML-05-265-1, D-ML-05-265-4, D- ML-05-265-5, D-ML-05-265-6, D-ML-05-265-7, and D-ML-05-265-10. Building 82 has one 1250kVA generator. Building 73 has one 225kVA generator. Building 109 has one 235kVA generator. Building 90 has one 312.5kVA generator. Building 85 has one 438kVA generator.

Building 46 has one 275kVA generator. Additional generator ratings including the subtransient reactance are given on the one-line drawings. An X/R ratio of 20 has been considered for each generator less than 875kVA to facilitate the arc-flash analysis calculation. An X/R ratio of 23.4 was used for the 1250kVA generator. In all instances the calculated maximum available bolted three-phase RMS symmetrical short-circuit current at the point of common coupling to the system (i.e. ATS) is considerably higher from the normal source compared to the generator source. The "Short Circuit Comparison Table" is based on the higher source calculations. Therefore, all equipment determined to be adequate under normal utility supply conditions will also be adequate when the generator is in operation.

3.2.3 Cable Data

The "FEEDER INPUT DATA" computer printouts list the cable data used for each circuit segment. Included are cable lengths, number per phase, size, conductor material, cable insulation type, conduit material and resistance and reactance values. Also, circuit segment cable lengths, number per phase, and size and conductor material are recorded on the one-line diagrams. Cable lengths that were unknown were estimated where possible to simulate a worst-case fault analysis.

3.2.4 Transformer Data

Transformer percent impedance and X/R ratio values were assumed for all transformers except where specific data was provided. The assumed impedance values were based on typical data and are indicated on the one-line diagrams. The exact R and X component values used are shown on the "TRANSFORMER INPUT DATA" printouts.

3.2.5 Motor Contribution To Short-Circuit Current

Motor contribution to the short-circuit current is taken into account in this short-circuit analysis.

During the first few cycles of a fault, all running motors act as generators and produce a current which will combine with the Power Company short-circuit current flowing to the fault. All connected motors shown on the study one-line were assumed to be running at the time of the fault.

For calculation of low-voltage fault duty, the contribution from all induction motors and synchronous motors in the system are considered. For medium and high-voltage buses, contributions for induction motors less than 50 hp are neglected, per ANSI C37 standards. Motors fed by adjustable-speed drives are also not considered, since they generally do not contribute to fault current. For motors fed by drives equipped with bypass contactors, though, it was assumed that the bypass path was used so that the motors would contribute to system fault currents.

The motor short-circuit contribution is determined and included in the computer short-circuit analysis so that the results should represent the highest short-circuit current to which the equipment might be subjected. The modeled values used appear on the "CONTRIBUTION DATA" and the "FAULT REPORT" computer printouts.

3.3 Analysis of Results and Recommendations

After making the calculations, the electrical distribution equipment was checked to determine its adequacy to interrupt or withstand the effects of the calculated maximum short-circuit current at its location. The results are listed in the "SHORT-CIRCUIT COMPARISON TABLE".

Listed in the tables are the calculated short-circuit currents at each piece of equipment and the ratings of the lowest rated device in the equipment enclosure. Though not shown in the table, the momentary short-circuit duty for medium-voltage equipment was also evaluated vs. the corresponding equipment ratings. For equipment shown as “adequate”, both the momentary and interrupting ratings were found to be adequate. Comparing the two sets of values shows that all of the equipment examined is either adequate by itself or when used in series with another circuit breaker or protected by a line side current-limiting fuse or circuit breaker except for the following:

This study recommends a review of INADEQUATE equipment noted in table 3.4 and replacement of breakers or entire equipment as required to ensure proper application.

Field verify equipment that may have short-circuit current ratings for the items shown as #N/A in the short-circuit comparison table notes column. Make sure the equipment is adequately rated.

The printouts in Appendices A and B show the complete input data and short-circuit output data from SKM’s Power*Tools software.

3.4 Short-Circuit Comparison Tables

VA MEDICAL CENTER

POWER SYSTEMS ENGINEERING SHORT-CIRCUIT BOISE, ID

LEXINGTON, KY COMPARISON TABLE ML 5265

EQUIP. DESCRIPTION LOWEST RATED DEVICE MAXIMUM LINE SIDE

BUS PER SYSTEM ONE NOMINAL IN EQUIPMENT ENCLOSURE AVAILABLE X/R MAXIMUM SERIES NOTES NO. LINE DIAGRAM(S) L-L VOLTS TYPE AIC OR WCR 3-PH SCA OR DUTY RATIO DEVICE RATING

002 POLE BOIS 12470 #N/A 2,815 4.31 #N/A

003A 15KV SWGR 12470 DSE-65 21,650 2,809 4.37 Adequate

003B 15KV SWGR 12470 15HK-1200A 23,210 2,809 4.37 Adequate

004 1000KW GEN 12470 #N/A 2,807 4.38 #N/A

005E MH #2 F2 12470 #N/A 2,805 4.35 #N/A

005N MH #2 FN 12470 #N/A 2,805 4.35 #N/A

006E 150 KVA 12470 SCCR10 10,000 3,568 4.31 Adequate

006L 150 KVA 12470 SCCR10 10,000 3,568 4.31 Adequate

006N 150 KVA 12470 SCCR10 10,000 3,568 4.31 Adequate

007E 500 KVA 12470 #N/A 2,790 4.27 #N/A

007L 500 KVA 12470 #N/A 2,790 4.27 #N/A

007N 500 KVA 12470 #N/A 2,790 4.27 #N/A

008E MH #4 F2 12470 #N/A 2,796 4.3 #N/A

008N MH #4 FN 12470 #N/A 2,796 4.3 #N/A

009E MH #15 F2 12470 #N/A 2,777 4.2 #N/A

009N MH #15 FN 12470 #N/A 2,777 4.2 #N/A

010E 150 KVA 12470 #N/A 2,746 4.05 #N/A

010L 150 KVA 12470 #N/A 2,745 4.05 #N/A

010N 150 KVA 12470 #N/A 2,745 4.05 #N/A

011 75 kVA 12470 #N/A 2,773 4.18 #N/A

012 50 kVA 12470 #N/A 2,770 4.16 #N/A

013E 112.5 KVA 12470 SCCR10 10,000 3,512 4.19 Adequate

013L 112.5 KVA 12470 SCCR10 10,000 3,512 4.19 Adequate

013N 112.5 KVA 12470 SCCR10 10,000 3,512 4.19 Adequate

#N/A = Number not available. SCCT Page 1 of 24

LEXINGTON, KY COMPARISON TABLE ML 5265

EQUIP. DESCRIPTION LOWEST RATED DEVICE MAXIMUM LINE SIDE

BUS PER SYSTEM ONE NOMINAL IN EQUIPMENT ENCLOSURE AVAILABLE X/R MAXIMUM SERIES NOTES NO. LINE DIAGRAM(S) L-L VOLTS TYPE AIC OR WCR 3-PH SCA OR DUTY RATIO DEVICE RATING

014E 150 KVA 12470 #N/A 2,753 3.96 #N/A

014L 150 KVA 12470 #N/A 2,753 3.96 #N/A

014N 150 KVA 12470 #N/A 2,753 3.96 #N/A

015E 500 KVA 12470 #N/A 2,794 4.29 #N/A

015L 500 KVA 12470 #N/A 2,794 4.29 #N/A

015N 500 KVA 12470 #N/A 2,794 4.29 #N/A

016E MH #5 F2 12470 #N/A 2,785 4.25 #N/A

016N MH #5 FN 12470 #N/A 2,785 4.25 #N/A

017E 300 KVA 12470 #N/A 2,781 4.22 #N/A

017L 300 KVA 12470 #N/A 2,781 4.22 #N/A

017N 300 KVA 12470 #N/A 2,781 4.22 #N/A

018E 1000 KVA 12470 SCCR25 25,000 2,779 4.22 Adequate

018L 1000 KVA 12470 SCCR25 25,000 2,780 4.22 Adequate

018N 1000 KVA 12470 SCCR25 25,000 2,780 4.22 Adequate

019E MH #6 F2 12470 #N/A 2,773 4.19 #N/A

019N MH #6 FN 12470 #N/A 2,774 4.19 #N/A

020E MH #7 F2 12470 #N/A 2,763 4.14 #N/A

020N MH #7 FN 12470 #N/A 2,763 4.13 #N/A

021E 300 KVA 12470 #N/A 2,748 4.06 #N/A

021L 300 KVA 12470 #N/A 2,748 4.06 #N/A

021N 300 KVA 12470 #N/A 2,747 4.06 #N/A

022E 500 KVA 12470 #N/A 2,718 3.93 #N/A

022L 500 KVA 12470 #N/A 2,719 3.93 #N/A

022N 500 KVA 12470 #N/A 2,719 3.93 #N/A

#N/A = Number not available. SCCT Page 2 of 24

LEXINGTON, KY COMPARISON TABLE ML 5265

EQUIP. DESCRIPTION LOWEST RATED DEVICE MAXIMUM LINE SIDE

BUS PER SYSTEM ONE NOMINAL IN EQUIPMENT ENCLOSURE AVAILABLE X/R MAXIMUM SERIES NOTES NO. LINE DIAGRAM(S) L-L VOLTS TYPE AIC OR WCR 3-PH SCA OR DUTY RATIO DEVICE RATING

023E MH #10 F2 12470 #N/A 2,757 4.11 #N/A

023N MH #10 FN 12470 #N/A 2,757 4.1 #N/A

024E 225 KVA 12470 #N/A 2,749 4.07 #N/A

024L 225 KVA 12470 #N/A 2,749 4.07 #N/A

024N 225 KVA 12470 #N/A 2,749 4.07 #N/A

025E MH #18 F2 12470 #N/A 2,745 4.05 #N/A

025N MH #18 FN 12470 #N/A 2,745 4.04 #N/A

026E MH #19 F2 12470 #N/A 2,733 3.99 #N/A

026N MH #19 FN 12470 #N/A 2,733 3.99 #N/A

027E MH #20 F2 12470 #N/A 2,729 3.98 #N/A

027N MH #20 FN 12470 #N/A 2,729 3.97 #N/A

028E MH #21 F2 12470 #N/A 2,727 3.96 #N/A

028N MH #21 FN 12470 #N/A 2,726 3.95 #N/A

029E P.S. S-3 12470 #N/A 2,726 3.96 #N/A

029L P.S. S-3 12470 #N/A 2,725 3.95 #N/A

029N P.S. S-3 12470 #N/A 2,725 3.95 #N/A

030 45 KVA 12470 #N/A 2,724 3.94 #N/A

031A 45 KVA 208 #N/A 2,186 3.01 #N/A

031B PNL-1 208 QJ2 10,000 2,061 2.59 Adequate

032E MH #14 F2 12470 #N/A 2,726 3.95 #N/A

032N MH #14 FN 12470 #N/A 2,725 3.94 #N/A

033E P.S. S-2 12470 #N/A 2,725 3.95 #N/A

033L P.S. P-2 12470 #N/A 2,725 3.95 #N/A

033N P.S. S-2 12470 #N/A 2,724 3.94 #N/A

#N/A = Number not available. SCCT Page 3 of 24

LEXINGTON, KY COMPARISON TABLE ML 5265

EQUIP. DESCRIPTION LOWEST RATED DEVICE MAXIMUM LINE SIDE

BUS PER SYSTEM ONE NOMINAL IN EQUIPMENT ENCLOSURE AVAILABLE X/R MAXIMUM SERIES NOTES NO. LINE DIAGRAM(S) L-L VOLTS TYPE AIC OR WCR 3-PH SCA OR DUTY RATIO DEVICE RATING

034 1000 KVA 12470 #N/A 2,723 3.94 #N/A

035E MH #8 F2 12470 #N/A 2,725 3.95 #N/A

035N MH #8 FN 12470 #N/A 2,724 3.94 #N/A

036 TSW 500KVA 12470 #N/A 2,725 3.94 #N/A

037E 300 KVA 12470 #N/A 2,685 3.57 #N/A

037L 300 KVA 12470 #N/A 2,685 3.57 #N/A

037N 300 KVA 12470 #N/A 2,684 3.56 #N/A

038E P.S. S-1 12470 #N/A 2,728 3.97 #N/A

038L P.S. S-1 12470 #N/A 2,728 3.97 #N/A

038N P.S. S-1 12470 #N/A 2,728 3.97 #N/A

039 MH #22 12470 #N/A 2,679 3.6 #N/A

040 45 KVA 12470 SCCR10 10,000 3,254 3.57 Adequate

040A 45 KVA 208 #N/A 4,344 3.01 #N/A

040B 1 208 #N/A 4,060 2.61 #N/A

040C 1A 208 #N/A 1,974 0.62 #N/A

041 MH #23 12470 #N/A 2,660 3.48 #N/A

042 167 KVA 12470 #N/A 2,604 3.15 #N/A

043 75 KVA 12470 #N/A 2,619 3.23 #N/A

044 MH #24 12470 #N/A 2,618 3.23 #N/A

045 75 KVA 12470 #N/A 2,575 3.01 #N/A

046 MH #26 12470 #N/A 2,606 3.16 #N/A

047 500 KVA 12470 #N/A 2,581 3.03 #N/A

048 MH #25 12470 #N/A 2,575 3.01 #N/A

049 75 KVA 12470 #N/A 2,537 2.83 #N/A

#N/A = Number not available. SCCT Page 4 of 24

LEXINGTON, KY COMPARISON TABLE ML 5265

EQUIP. DESCRIPTION LOWEST RATED DEVICE MAXIMUM LINE SIDE

BUS PER SYSTEM ONE NOMINAL IN EQUIPMENT ENCLOSURE AVAILABLE X/R MAXIMUM SERIES NOTES NO. LINE DIAGRAM(S) L-L VOLTS TYPE AIC OR WCR 3-PH SCA OR DUTY RATIO DEVICE RATING

050 150 KVA 12470 #N/A 2,556 2.92 #N/A

100 75 KVA 416 #N/A 9,793 3 #N/A

101 PNL-T14 416 SCCR10 10,000 7,882 2.43 Adequate

102 PNL-1 416 QO 10,000 5,013 1.2 Adequate

103 PNL-1A 416 #N/A 3,315 0.66 #N/A

104 PNL-1B 416 #N/A 3,566 0.72 #N/A

105 PNL-2 416 QO 10,000 4,377 1.02 Adequate

106 PNL-2A 416 #N/A 3,111 0.65 #N/A

107 PNL-1 416 QO 10,000 5,206 1.33 Adequate

108 PNL-52 416 #N/A 4,385 0.95 #N/A

109 75 KVA 480 #N/A 2,790 3.42 #N/A

110 ENCL. C/B 480 FH(3P) 25,000 2,753 3.28 Adequate

111 GUTTER 480 #N/A 2,740 3.23 #N/A

112 TAP 480 #N/A 2,727 3.19 #N/A

113 STARTER 480 #N/A 2,674 2.81 #N/A

114 ENCL. C/B 480 FH(3P) 25,000 2,605 2.25 Adequate

115 9 KVA 480 #N/A 2,513 1.9 #N/A

116 9 KVA 208 #N/A 1,298 2.68 #N/A

117 PNL-1 208 QOB 10,000 1,349 2.25 Adequate

118 75 KVA 416 #N/A 9,778 2.98 #N/A

119 PNL-T15 416 Q2 10,000 10,674 2.86 INADEQUATE

120 PNL-1 416 QOB 10,000 6,104 1.17 Adequate

121 PNL-45 416 QO 10,000 1,451 0.21 Adequate

122 PNL-1A 416 QO 10,000 1,586 0.26 Adequate

#N/A = Number not available. SCCT Page 5 of 24

LEXINGTON, KY COMPARISON TABLE ML 5265

EQUIP. DESCRIPTION LOWEST RATED DEVICE MAXIMUM LINE SIDE

BUS PER SYSTEM ONE NOMINAL IN EQUIPMENT ENCLOSURE AVAILABLE X/R MAXIMUM SERIES NOTES NO. LINE DIAGRAM(S) L-L VOLTS TYPE AIC OR WCR 3-PH SCA OR DUTY RATIO DEVICE RATING 123 PNL-1 416 Q2 10,000 5,689 1.08 Adequate

124 PNL-1A 416 #N/A 2,920 0.48 #N/A

125 PNL-2 416 TQDL 10,000 4,864 0.92 Adequate

126 PNL-2A 416 #N/A 2,451 0.43 #N/A

127 PNL-2B 416 #N/A 3,536 0.61 #N/A

128 PNL-1 416 #N/A 503 0.08 #N/A

129 PNL-30 416 QO 10,000 1,552 0.64 Adequate

130 167 KVA 416 #N/A 18,567 3.81 #N/A

131 PNL-T13 416 SCCR18 18,000 17,917 3.52 Adequate

132 PNL-1 416 QP 10,000 5,413 0.64 Adequate

133 PNL-44 416 SCCR22 22,000 13,821 2.31 Adequate

134 PNL-1 416 QO 10,000 6,530 0.73 Adequate

135 PNL-2 416 QO 10,000 8,446 0.94 Adequate

136 PNL-3 416 QO 10,000 9,424 1.07 Adequate

137 PNL-4 416 QO 10,000 6,824 0.67 Adequate

138 PNL-5 416 QO 10,000 5,824 0.66 Adequate

139 PNL-6 416 THQL 10,000 8,160 0.97 Adequate

140 PNL-7 416 QO 10,000 8,446 0.94 Adequate

141 PNL-8 416 QO 10,000 8,271 0.91 Adequate

142 PNL-9 416 QO 10,000 7,413 0.82 Adequate

143 PNL-10 416 TQL(1P) 5,000 7,140 0.79 INADEQUATE

144 PNL-11 416 QO 10,000 6,158 0.69 Adequate

145 PNL-12 416 TQL(1P) 5,000 5,916 0.67 INADEQUATE

146 PNL-12A 416 QO 10,000 3,578 0.49 Adequate

#N/A = Number not available. SCCT Page 6 of 24

LEXINGTON, KY COMPARISON TABLE ML 5265

EQUIP. DESCRIPTION LOWEST RATED DEVICE MAXIMUM LINE SIDE

BUS PER SYSTEM ONE NOMINAL IN EQUIPMENT ENCLOSURE AVAILABLE X/R MAXIMUM SERIES NOTES NO. LINE DIAGRAM(S) L-L VOLTS TYPE AIC OR WCR 3-PH SCA OR DUTY RATIO DEVICE RATING

147 150 KVA 208 #N/A 9,061 3.76 #N/A

148 PNL-T21 208 TJD 22,000 8,845 3.61 Adequate

149 CHILLER 208 SCCR25 25,000 7,755 3.05 Adequate

150 PNL-2 208 THQB 10,000 5,603 1.04 Adequate

151 PNL-3 208 #N/A 3,553 0.69 #N/A

152 150 KVA 480 #N/A 3,654 3.53 #N/A

153 MDP1 480 SCCR10 10,000 4,315 3.38 Adequate

154 30 KVA 480 #N/A 3,559 3.09 #N/A

155 30 KVA 208 #N/A 1,362 3.01 #N/A

156 PNL-2 208 SCCR10 10,000 1,515 2.75 Adequate

157 PNL-1 208 QO 10,000 824 1.08 Adequate

158 PNL-2 208 SCCR10 10,000 1,129 1.45 Adequate

159 FUSE BLOCK 208 SCCR50 50,000 959 0.97 Adequate

160 TO BLDG 21 208 #N/A 828 0.76 #N/A

161 PNL-1 480 SCCR14 14,000 3,461 2.58 Adequate

162 PNL-1 480 SCCR14 14,000 3,365 2.61 Adequate

163 500 KVA 208 #N/A 25,267 4.82 #N/A

164 CTB 208 #N/A 24,831 4.66 #N/A

165 MDP1 208 SCCR50 50,000 24,556 4.49 Adequate

166L ATS1 208 #N/A 20,816 3.56 #N/A

166N ATS1 208 #N/A 20,816 3.56 #N/A

167 EDP1 208 SCCR25 25,000 19,775 3.37 Adequate

168 EG8 208 QO 10,000 11,041 1.33 INADEQUATE

169 EG8A 208 QO 10,000 4,342 0.47 Adequate

#N/A = Number not available. SCCT Page 7 of 24

LEXINGTON, KY COMPARISON TABLE ML 5265

EQUIP. DESCRIPTION LOWEST RATED DEVICE MAXIMUM LINE SIDE

BUS PER SYSTEM ONE NOMINAL IN EQUIPMENT ENCLOSURE AVAILABLE X/R MAXIMUM SERIES NOTES NO. LINE DIAGRAM(S) L-L VOLTS TYPE AIC OR WCR 3-PH SCA OR DUTY RATIO DEVICE RATING

170 400A SW 208 #N/A 7,192 1.31 #N/A

171 ENCL. C/B 208 TQDL 10,000 7,026 1.31 Adequate

172 ELEV #1 208 #N/A 6,692 1.32 #N/A

173 ENCL. C/B 208 KA 42,000 7,934 1.34 Adequate

174 ELEV #2 208 #N/A 7,453 1.33 #N/A

175L ATS2 208 #N/A 19,675 3.32 #N/A

175N ATS2 208 #N/A 19,675 3.33 #N/A

176 EDP2 208 SCCR25 25,000 17,422 2.97 Adequate

177 EG4 208 QOB 10,000 14,920 1.58 INADEQUATE

178 PNL-E1 208 SCCR22 22,000 3,921 0.29 Adequate

179 EG7 208 SCCR10 10,000 4,330 0.45 Adequate

180 EG9 208 QOB 10,000 5,879 0.55 Adequate

181 EG9A 208 THQL 10,000 4,552 0.47 Adequate

182 E1N 208 SCCR10 10,000 6,809 0.61 Adequate

183 E1S 208 #N/A 3,073 0.37 #N/A

184 E1SA 208 SCCR10 10,000 1,965 0.31 Adequate

185 E2N 208 SCCR10 10,000 5,076 0.49 Adequate

186 E2S 208 SCCR22 22,000 2,006 0.31 Adequate

187 E3N 208 SCCR10 10,000 4,175 0.44 Adequate

188 EPH1 208 SCCR10 10,000 1,568 0.22 Adequate

189 E3S 208 SCCR10 10,000 1,906 0.31 Adequate

190A MBPBBB11X 208 JD/C-H 65,000 8,816 1.19 Adequate

190C MBPBBB11X 208 JD/C-H 65,000 8,811 1.19 Adequate

192A EG3 208 SCCR10 10,000 7,607 1.08 Adequate

#N/A = Number not available. SCCT Page 8 of 24

LEXINGTON, KY COMPARISON TABLE ML 5265

EQUIP. DESCRIPTION LOWEST RATED DEVICE MAXIMUM LINE SIDE

BUS PER SYSTEM ONE NOMINAL IN EQUIPMENT ENCLOSURE AVAILABLE X/R MAXIMUM SERIES NOTES NO. LINE DIAGRAM(S) L-L VOLTS TYPE AIC OR WCR 3-PH SCA OR DUTY RATIO DEVICE RATING 192B EG3A 208 SCCR10 10,000 7,210 1.01 Adequate

193 EG5 208 SCCR10 10,000 2,428 0.34 Adequate

194 EG6 208 #N/A 3,245 0.38 #N/A

195 EG1 208 THQB 10,000 8,961 1.21 Adequate

196 EG2 208 Q2 10,000 5,782 0.94 Adequate

197 G4 208 QOB 10,000 17,821 1.35 INADEQUATE

198 67 208 #N/A 3,040 0.2 #N/A

199 G2 208 #N/A 7,834 1.01 #N/A

200 ENCL. C/B 208 SCCR10 10,000 5,363 0.7 Adequate

201 G2A 208 #N/A 5,006 0.66 #N/A

202 2N-1 208 SCCR10 10,000 10,303 1.17 INADEQUATE

203 2N-2 208 SCCR10 10,000 9,924 1.14 Adequate

204 2S-1 208 SCCR10 10,000 4,995 0.85 Adequate

205 2S-2 208 SCCR22 22,000 4,916 0.85 Adequate

206 3N-1 208 QOB 10,000 8,957 1.08 Adequate

207A PH1 208 SCCR10 10,000 1,830 0.24 Adequate

207B 3N-2 208 SCCR10 10,000 8,666 1.06 Adequate

208 3S-1 208 SCCR10 10,000 4,444 0.83 Adequate

209 3S-2 208 SCCR10 10,000 4,370 0.82 Adequate

210 G1 208 #N/A 1,324 0.24 #N/A

211 CH-1 208 #N/A 9,032 2.01 #N/A

212 CH-2 208 #N/A 5,162 0.91 #N/A

213 G5 208 THQB 10,000 10,976 1.18 INADEQUATE

214 G5B 208 SCCR10 10,000 6,499 0.62 Adequate

#N/A = Number not available. SCCT Page 9 of 24

LEXINGTON, KY COMPARISON TABLE ML 5265

EQUIP. DESCRIPTION LOWEST RATED DEVICE MAXIMUM LINE SIDE

BUS PER SYSTEM ONE NOMINAL IN EQUIPMENT ENCLOSURE AVAILABLE X/R MAXIMUM SERIES NOTES NO. LINE DIAGRAM(S) L-L VOLTS TYPE AIC OR WCR 3-PH SCA OR DUTY RATIO DEVICE RATING

215 G5 208 THQB 10,000 10,479 1.14 INADEQUATE

216 G5A 208 THQB 10,000 6,004 0.6 Adequate

217 MCCA 208 TED(3P) 18,000 5,472 1.04 Adequate

218 G3 208 QO 10,000 5,602 0.64 Adequate

219 1000 KVA 480 SCCR50 50,000 18,591 6.19 Adequate

220 MDP1 480 FA(3P) 18,000 17,346 4.34 Adequate

221 HV1 480 EH(3P) 14,000 15,527 3.48 INADEQUATE

222 MCC-G11 480 SCCR18 18,000 12,485 1.52 Adequate

223 112.5 KVA 480 #N/A 13,933 2.72 #N/A

224 112.5 KVA 208 #N/A 6,042 2.94 #N/A

225 LV1 208 QOB 10,000 6,796 2.89 Adequate

226 LV2 208 QOB-VH 22,000 5,608 2.54 Adequate

227 LV3 208 QOB-VH 22,000 4,803 1.63 Adequate

228 ELEVATOR 480 HEV DUTY SS-R 200,000 10,993 1.38 Adequate

229 MDP1 480 SCCR14 14,000 13,304 2.72 Adequate

230 HV1 480 TEY(1P) 14,000 12,105 2.22 Adequate

231 200A SW 480 #N/A 11,571 1.82 #N/A

232 75 KVA 480 #N/A 11,131 1.68 #N/A

233 75 KVA 208 #N/A 3,535 2.74 #N/A

234 LV1 208 TQDL 10,000 3,583 2.39 Adequate

235 LV2 208 SCCR10 10,000 3,391 2.18 Adequate

236 C/B ESD 480 TJK6 30,000 17,562 5.39 Adequate

237L ATS1 480 SCCR65 65,000 16,854 4.93 Adequate

237N ATS1 480 SCCR65 65,000 16,854 4.93 Adequate

#N/A = Number not available. SCCT Page 10 of 24

LEXINGTON, KY COMPARISON TABLE ML 5265

EQUIP. DESCRIPTION LOWEST RATED DEVICE MAXIMUM LINE SIDE

BUS PER SYSTEM ONE NOMINAL IN EQUIPMENT ENCLOSURE AVAILABLE X/R MAXIMUM SERIES NOTES NO. LINE DIAGRAM(S) L-L VOLTS TYPE AIC OR WCR 3-PH SCA OR DUTY RATIO DEVICE RATING

238 EDP1 480 SCCR14 14,000 18,038 4.57 INADEQUATE

239 150 KVA 480 #N/A 15,869 3.97 #N/A

240 150 KVA 208 #N/A 7,258 3.58 #N/A

241 ELV1 208 TQDL 10,000 7,544 2.75 Adequate

242 ELV2 208 SCCR10 10,000 6,867 2.35 Adequate

243 ELV3 208 SCCR10 10,000 6,571 2.17 Adequate

244 EHV1 480 #N/A 13,393 2.39 #N/A

245 5 KVA 480 #N/A 7,867 0.69 #N/A

246 5 KVA 208 #N/A 2,468 2.36 #N/A

247 MCC 480 SCCR25 25,000 12,823 2.48 Adequate

248 100A SW 480 SCCR10 10,000 10,037 1.27 INADEQUATE

249 CH-1 480 #N/A 9,558 1.21 #N/A

250 100A SW 480 SCCR10 10,000 10,694 1.37 INADEQUATE

251 CH-2 480 #N/A 10,163 1.29 #N/A

252 500 KVA 480 #N/A 11,376 4.62 #N/A

253 MDP1 480 KC 65,000 11,028 4.33 Adequate

254 HA 480 EDB(3P) 18,000 10,757 3.52 Adequate

255 75 KVA 480 #N/A 9,429 2.31 #N/A

256 75 KVA 208 #N/A 3,965 2.85 #N/A

257 LA-1 208 Q2 10,000 4,478 2.8 Adequate

258 LA-2 208 QO 10,000 4,429 2.76 Adequate

259 MDA 480 EDB(3P) 18,000 11,284 4.07 Adequate

260 HB 480 EDB(3P) 18,000 10,128 3.15 Adequate

261 75 KVA 480 #N/A 9,940 2.9 #N/A

#N/A = Number not available. SCCT Page 11 of 24

LEXINGTON, KY COMPARISON TABLE ML 5265

EQUIP. DESCRIPTION LOWEST RATED DEVICE MAXIMUM LINE SIDE

BUS PER SYSTEM ONE NOMINAL IN EQUIPMENT ENCLOSURE AVAILABLE X/R MAXIMUM SERIES NOTES NO. LINE DIAGRAM(S) L-L VOLTS TYPE AIC OR WCR 3-PH SCA OR DUTY RATIO DEVICE RATING

262 75 KVA 208 #N/A 3,998 2.98 #N/A

263 LB-1 208 Q2 10,000 4,568 2.92 Adequate

264 LB-2 208 QO 10,000 4,502 2.86 Adequate

265 MDB 480 EDB(3P) 18,000 10,842 3.9 Adequate

266 MDB2 480 EH(3P) 14,000 10,659 3.77 Adequate

267 ENCL. C/B 480 FA(3P) 18,000 4,552 0.57 Adequate

268 ELEVATOR 480 #N/A 4,045 0.51 #N/A

269 500 KVA 208 #N/A 25,352 4.86 #N/A

270 D-4 1600A 208 SCCR25 25,000 24,419 4.65 Adequate

271 MDP2 208 BA 10,000 15,709 3.44 INADEQUATE

272 MDP1 208 Q2 10,000 17,961 3.24 INADEQUATE

273 T110 208 SCCR10 10,000 2,858 0.78 Adequate

274 1 208 SCCR10 10,000 1,882 0.57 Adequate

275 2 208 SCCR10 10,000 1,514 0.47 Adequate

276 1 208 QO 10,000 5,721 0.65 Adequate

277 2 208 QOB 10,000 7,372 0.97 Adequate

278 3 208 THQB 10,000 14,796 2.42 INADEQUATE

279 4 208 THQB 10,000 12,123 1.91 INADEQUATE

280 5 208 QOB 10,000 8,261 1.07 Adequate

281 6 208 QOB 10,000 7,469 0.89 Adequate

282 6A 208 QO 10,000 6,698 0.79 Adequate

283 ENCL. CB 7 208 KA 42,000 8,909 1.06 Adequate

284 8 208 QOB 10,000 10,456 2.09 INADEQUATE

285 8 SEC. 2 208 QOB 10,000 10,164 2.06 INADEQUATE

#N/A = Number not available. SCCT Page 12 of 24

LEXINGTON, KY COMPARISON TABLE ML 5265

EQUIP. DESCRIPTION LOWEST RATED DEVICE MAXIMUM LINE SIDE

BUS PER SYSTEM ONE NOMINAL IN EQUIPMENT ENCLOSURE AVAILABLE X/R MAXIMUM SERIES NOTES NO. LINE DIAGRAM(S) L-L VOLTS TYPE AIC OR WCR 3-PH SCA OR DUTY RATIO DEVICE RATING 286L ATS-1 208 SCCR35 35,000 13,662 2.81 Adequate

286N ATS-1 208 SCCR35 35,000 13,662 2.81 Adequate

287 EDP1 208 SCCR10 10,000 13,690 2.52 INADEQUATE

288 85AE-1 208 BA 10,000 10,595 1.57 INADEQUATE

289 85AE-2 208 QO 10,000 1,737 0.23 Adequate

290 E1 208 QOB 10,000 8,159 1.21 Adequate

291 E1 SEC. 2 208 QOB 10,000 7,945 1.17 Adequate

292 E2 208 THQB 10,000 7,240 0.83 Adequate

293 E3 208 QOB 10,000 4,803 0.55 Adequate

294 E4 208 QO 10,000 3,634 0.53 Adequate

295 E5 208 QO 10,000 6,762 1 Adequate

296 E5 SEC. 2 208 QO 10,000 6,608 0.98 Adequate

297 85AN1 208 BA 10,000 9,087 1.38 Adequate

298 85AN2 208 BA 10,000 8,571 1.27 Adequate

299 85AN3 208 BA 10,000 6,088 1.04 Adequate

300 85AN4 208 BA 10,000 5,381 0.92 Adequate

301 85AN5 208 BA 10,000 4,195 0.6 Adequate

302 85AN6 208 QO 10,000 6,843 1.11 Adequate

303 AHU-1 208 #N/A 9,412 2.42 #N/A

304 RTU-1A 208 #N/A 6,047 1.05 #N/A

305 MDP3 208 SCCR25 25,000 8,277 2.23 Adequate

306 9 208 BA 10,000 7,240 1.53 Adequate

307 1000 KVA 480 #N/A 20,422 5.92 #N/A

308 MDP1 480 SCCR30 30,000 20,416 5.45 Adequate

#N/A = Number not available. SCCT Page 13 of 24

LEXINGTON, KY COMPARISON TABLE ML 5265

EQUIP. DESCRIPTION LOWEST RATED DEVICE MAXIMUM…