36C24419Q0974-021.pdf

Power System Engineering

December 2015

DISCLAIMER

The following report was prepared by the Power System Engineering group of Schneider Electric USA, Inc.

(SEUSA) utilizing industry-accepted standards and practices along with the proprietary methodologies and analysis tools of SEUSA. Data used in this analysis was acquired by Power System Engineering and provided by others, through onsite discovery, published information, equipment nameplates, manufacturer ratings, testing, analysis, or other means. SEUSA assumes no responsibility for inaccuracies in data provided by others. 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 protective device settings, or failure to properly maintain equipment may invalidate these results.

TABLE OF CONTENTS

1 EXECUTIVE SUMMARY

1.1 Overview

1.2 Revision History

1.3 Study Highlights

1.3.1 Short-Circuit Results

1.3.2 Coordination Results

1.3.3 Other Results

2 INTRODUCTION

3 SYSTEM FINDINGS

3.1 Study Analysis

3.1.1 Short-Circuit

3.1.2 Coordination

3.1.3 Other Results

4 SHORT-CIRCUIT ANALYSIS

4.1 General Procedure

4.2 Data Used in the Calculations

4.2.1 Power Company Data

4.2.2 Generator Data

4.2.3 Cable Data

4.2.4 Transformer Data

4.2.5 Motor Contribution to Short-Circuit Current

4.2.6 Assumptions and Estimates

4.3 Short-Circuit Analysis Results and Recommendations

4.4 Short-Circuit Evaluation Table

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 Time-Overcurrent Relay Coordination

5.2.4 Instantaneous Trip Breakers

5.2.5 Low-Voltage Ground-Fault Relay Settings

5.2.6 Transformer Protective Devices

5.2.7 Cable Protection

5.2.8 Generator Protection

5.2.9 Selective Coordination and the National Electric Code

5.2.10 Assumptions and Estimates

5.3 Analysis of Results and Recommendations

5.3.1 NEC Compliance Issues

5.3.2 TCC Plot Remarks

5.4 Overcurrent Device Setting Tables –Existing and Recommended Settings

5.5 Time-Current Coordination Graphs - Recommended Settings

APPENDIX A: ABBREVIATIONS AND TRADEMARKS

APPENDIX B: SHORT CIRCUIT INPUT/OUTPUT DATA

APPENDIX C: REFERENCES

APPENDIX D: SYSTEM STUDY ONE-LINE DIAGRAM

1 EXECUTIVE SUMMARY

1.1 Overview

This report documents the results of a Power System Engineering analysis for the VAMC in Pittsburgh, PA. The objective of this section is to briefly summarize the results of the analysis and highlight key issues and findings in the electrical distribution equipment. For items addressed by equipment, conductor, or device settings changes, the power system study results may need to be re-evaluated in a revision to this study. The full analysis can be found in the main body of the report.

The scope of this study is limited to that equipment shown on the study one-line diagrams located in the back of the report. Unless specifically required by job specifications, branch circuit utilization equipment, as defined per NEC Article 100, was not included in this study (this may consist of small equipment, 100A and less, such as: safety switches, industrial control panels, and enclosed starters/drives).

Note: Based on the current system design, medium voltage relay 005-11 feeds two transformers, one to ROB Bldg 30 (2000kVA) and one to Fisher House (150kVA). It appears that the Fisher House transformer does not have a fuse at its primary for protection. The relay 005-11 cannot be set low enough to provide proper protection for the Fisher House transformer (150kVA) and still allow the ROB Bldg 30 transformer (2000kVA) to operate properly. Hence protection is not being provided for the 150kVA transformer at this time. It is recommended to add an HVL section with a fuse between the manhole and Fisher House transformer in order to protect it adequately.

1.2 Revision History

This section will document revision history after the initial study has been submitted. Subsequent revision numbers are each listed on the front cover of the report and are explained below by indicating the following details: date of issue, reason for revision, and who initiated the revision.

When necessary, engineer’s comments and/or pertinent emails will be referred to in the references section of the report.

1.3 Study Highlights

1.3.1 Short-Circuit Results

Of the 656 device locations evaluated for adequacy to interrupt or withstand the maximum three-phase short-circuit current to which they could be subjected, 114 were identified to be INADEQUATE. The Short-Circuit Evaluation Table also lists equipment that was not evaluated because the equipment’s rating could not be determined.

Graph of equipment short-circuit capability

1.3.2 Coordination Results

Of the 323 adjustable devices, 217 of them required setting changes in order to ensure optimum selectivity, or protect equipment.

Graph of affected devices

1.3.3 Other Results

Other issues, which are not formally in the scope of work, were observed in the course of data collection and analysis. These could be NEC compliance issues.

2 INTRODUCTION

This report has the following components:

Studies were performed using nationally recognized electrical engineering analysis software.

The system short-circuit analysis evaluates the adequacy of the distribution equipment shown on the enclosed one-line diagrams to withstand or to interrupt the calculated maximum available short-circuit current at its location.

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.

This report supersedes and invalidates results from any prior study for the scope of equipment being reviewed.

Electrical system changes within the facility or in the utility system can have a significant impact on the results of this power system analysis, which is a “snapshot” of as-found system conditions. As such, it is recommended that this analysis be re-evaluated on a regular basis, not to exceed 5 years, to account for electrical system changes. NFPA 70B and 70E address the issue of equipment maintenance and failure to properly maintain equipment may invalidate these results

A “REFERENCES” section near the end of the report cites who supplied information or how the data was obtained. The majority of this data is filed with the project and has not been reproduced in this report. Abbreviations and trademarks referenced throughout this report are also listed in an appendix.

3 SYSTEM FINDINGS

3.1 Study Analysis

Refer to each of the following sections for details. If issues are addressed by equipment, conductor, or device settings changes, the power system study results may need to be re-evaluated in a revision to this study.

3.1.1 Short-Circuit

The results of the short-circuit analysis show that the equipment considered in the study is adequately rated for the projected fault current levels except for the equipment shown in red in the Short Circuit Evaluation Table in Section 4.4. Refer to section 4.3 for further details and recommendations.

3.1.2 Coordination

Recommendations for equipment changes can result in equipment which is larger in ampacity and/or physical footprint, may require changes to other parts of the electrical design (e.g., cable and conduit sizing), and could also impact the architectural design. For Square D distribution equipment, examples are NF panel to an I-Line panel, or a smaller I-Line to a larger I-Line.

Recommendations are made for reasons such as coordination issues, protection violations, or transformer magnetic inrush concerns. When selective coordination, according to NEC 700, is required, further analysis beyond the scope of this study will be necessary as well as possible equipment construction or design changes.

Adjustable protective devices were set for optimum operation. The coordination study showed for the most part, acceptable levels of selectivity were achieved among devices in the system except as shown on TCCs: 002B, 003B, 003C, 003D, 003E, 004A, 004C, 007, 007A, 008A, 008D, 008M, 008N, 009B, 011C, 013C, 013F, 015B, 015C, and 017A.tcc. Refer to section 5.3.2 for further details and recommendations.

Based on the current system configuration the emergency system selectively coordinates to 0.1 seconds except as shown on the above mentioned TCCs. The devices have been optimized to provide the highest level of selectivity possible for the equipment and system design.

The breakers and relays in the system should be set to the recommended levels found in the Overcurrent Device Setting Tables section.

3.1.3 Other Results

Other issues, which are not formally in the scope of work, were observed in the course of data collection and analysis. These could be NEC compliance issues, equipment having poor condition of maintenance, or some other critical factor. Refer to section 5.3.1 for further details and recommendations.

4 SHORT-CIRCUIT ANALYSIS

4.1 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 switches and 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.

This analysis calculates 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 modeling 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

6.591. If such a breaker is applied at a system bus with a calculated X/R ratio of 6.591 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 Table 1. The 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 evaluation tables. See IEEE 1015-1997, IEEE Recommended Practice for Applying Low-Voltage Circuit Breakers Used in Industrial and Commercial Power Systems, for additional details.

Table 1: Summary of Test Power Factor and X/R Values for LV Devices.

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

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 diagram is a simplified version of the system drawings, showing only those parts of the electrical system under consideration. The various circuit locations on the diagram have been labeled with bus identification numbers so input data could be supplied to the computer and the computer output could be readily interpreted.

4.2 Data Used in the Calculations

4.2.1 Power Company Data

Duquesne Light has advised that their system is capable of delivering a maximum available three-phase short-circuit current of 15,800A at the 4,160V secondary of each 7500kVA incoming transformer with an estimated X/R ratio of 8. These values determined the starting point for the analysis.

4.2.2 Generator Data

It has been assumed that the generators in the system have a typical subtransient reactance of 15% with an 80% PF and an estimated X/R ratio of 20 at 480V. 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 for some ATSs, and vice versa for some. The "Short Circuit Evaluation Table" is based on the higher source calculations for each ATS.

4.2.3 Cable Data

The conductor (cable and/or busway) data used for each circuit segment are shown in the SHORT CIRCUIT INPUT/OUTPUT DATA appendix. Included are lengths, number per phase, size, conductor material, cable insulation type, conduit material and resistance and reactance values.

Also, conductor lengths, number per phase, and size and conductor material are recorded on the one-line diagram.

Resistance values are based on 25 degrees Celsius (room temperature) rather than the full load temperature usually shown in descriptive literature because short-circuits can occur when the circuit is initially energized or lightly loaded as well as when fully loaded.

4.2.4 Transformer Data

Nameplate transformer percent impedance and typical X/R ratio values were used for all transformers. The exact R and X component values used are shown in the SHORT CIRCUIT INPUT/OUTPUT DATA appendix.

4.2.5 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, running motors act as generators and produce a current which will combine with the source short-circuit current flowing to the fault as illustrated in Figure 1. Sources may be, but are not limited to, the Power Company, local generators, or both.

Figure 1: Example motor contribution.

Connected motors shown on the study one-line were assumed to be running at the time of the fault. Motors fed by adjustable speed drives equipped with bypass contactors were considered to contribute to system fault currents as well. However, motors fed by drives without bypass contactors were not considered since they do not contribute to fault current. Redundant motors shown on the study one-line were also assumed to be running at the time of the fault unless operating controls prohibit these conditions.

A motor’s contribution to a fault at its terminals is equal to the full-load ampere (FLA) rating of the motor divided by its per-unit subtransient reactance, similar to the contribution from a generator. However, at the upstream switchboard, panelboard, or motor-control center, the fault contribution from the individual motors is reduced by the impedance of the motor branch circuit conductors. Since data on motor subtransient reactances and branch-circuit conductor lengths is often difficult to obtain, assumptions regarding the motors’ subtransient reactances are typically made when the system model is built.

For calculation of low-voltage fault duty, the contribution from induction motors and synchronous motors in the system are considered. For small induction motors (less than 50 hp) where the impedance of the installation (i.e., motor and conductor) is not known, an equivalent subtransient reactance of 0.25 pu, resulting in a fault contribution of 4 times rated current, is assumed. Larger motors (50 hp and above) have an assumed subtransient reactance of 0.2 pu, resulting in a fault contribution of 5 times rated current. This is consistent with recommendations in IEEE Std. 141, IEEE Recommended Practice for Electric Power Distribution for Industrial Plants (the IEEE Red Book).

If applicable, multiplying factors are adjusted per Table 7 of ANSI/IEEE C37.010, IEEE Application Guide for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis for medium/high voltage fault duty. The table also shows contributions from induction motors less than 50 hp to be neglected.

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.

Unless otherwise indicated in the SC Computer Input Tabulations appendix, some motor loads are modeled as lumped induction motors connected directly to the low voltage buses using the recommended subtransient reactance values from C37.010, C37.13, and IEEE Std. 141. These modeled values appear in the appendices.

4.2.6 Assumptions and Estimates

Some assumptions, or estimates, were required and may affect the results of this study. In general, assumptions, or estimates, are needed because of limited access, safety concerns in obtaining equipment nameplate data, or lack of documentation. Significant differences between the assumptions, or estimates, listed here and actual values will require that this power system analysis be revised.

The following assumptions, or estimates, were made for the reasons given above:

1. Where conductor lengths were not available for small branch circuits, a length of 9 feet was used.

2. Where conductor sizes were not accessible in the field, cables sized per NEC 2014 Edition table 310.15(B)(16) were used in the analysis.

3. Where motor sizes were not accessible in the field, HP ratings were assumed based on the size of the cable and breaker feeding them.

4.3 Short-Circuit Analysis Results and Recommendations

After making the calculations, the distribution equipment was checked to determine its adequacy to interrupt or withstand the effects of the calculated maximum short-circuit current at its location.

For some solidly-grounded systems, like close-coupled unit substations and generator gear, it is possible the bolted three-phase fault current is not the maximum fault current. The power systems engineer performing the study considered applicable buses and has reported bolted line-to-ground fault current when required. The results are listed in the "SHORT-CIRCUIT EVALUATION

TABLE".

Short-circuit case description(s): A worst case analysis was considered with the system connected as follows and as shown on the oneline drawings at the back of this report.

- All Main-Tie-Main switchgears had one main and tie breaker closed, and the other main open

- The normal side of the system was fed by the Utility provided fault current

- All the four generators at the Paralleling Gear on drawing E602 were considered to be on

- All ATSs were fed from the Normal side except for the following o 444 ATS-3A o 011 ATS-BQ o 031 ATS-3 o 030 ATS-4 o 341 ATS-IP o 467 ATS-EK7 o 861 ATS-5 o 032 ATS-5EC o 471 ATS-6CS o 520 ATS-EQ o 529 ATS-CR o 549 ATS-LS o 684 ATS CHILLER o 269 ATS C o 289 ATS L o 984 ATS B1 ELEV 4 o 011 ATS BT-EQ

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. 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 equipment shown in red in the Short Circuit Evaluation Table in the next section.

The Short-Circuit Evaluation Table in the following section lists each piece of inadequate equipment.

RECOMMENDATIONS:

For all the inadequate panelboards and switchboards, circuit breakers should be replaced by ones that are adequately rated for the available fault current shown in the Table.

The table also shows that ATS 5EC and ATS-EK7 are not rated to withstand the available fault current. These will need to be replaced to increase the rating.

If applicable, equipment using series ratings that are shown in the short-circuit evaluation table must meet field labeling requirements per NEC Sections 110.22 and 240.86(B). There are two types of markings which must be present; the first requires series combination ratings to be marked on equipment by the manufacturer. The second equipment marking must be readily visible and state the following:

CAUTION – SERIES COMBINATION SYSTEM RATED _____ AMPERES.

IDENTIFIED REPLACEMENT COMPONENTS REQUIRED.

This labeling serves as a warning to those who may install new breakers or replace existing breakers at the given location in the future, alerting them to the fact that a specific device type must be used in order to ensure that the series rating is maintained.

The table also lists some equipment that was not evaluated because the equipment’s rating could not be determined at the time of study preparation. These are identified by note number ‘1’ in the far right hand column of the table.

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.

NEC 110.9 requires equipment to have a rating sufficient for interrupting the maximum available fault current present at the line side terminals of the equipment. NFPA 70E Article 210 also requires electrical equipment to have appropriate ratings to withstand or interrupt the available fault current. Where calculated available fault currents exceed the ratings of the equipment, remedial action, possibly including upgrade or replacement of the affected equipment, is required to comply with the NEC, NFPA 70E, and OSHA regulations. A risk of equipment damage, property damage, and personal injury exists when equipment has either inadequate withstand ratings or contains overcurrent protective devices (OCPDs) with inadequate interrupting ratings.

Equipment with inadequate ratings in this category can suffer damage which may include bent busbars, melted contactors, ruptured enclosures, or OCPDs may not be able to interrupt faults (three-phase bolted or arcing) properly.

Input data and short-circuit output data are included in the appendices.

4.4 Short-Circuit Evaluation Table

VAMC

Pittsburgh, PA

POWER SYSTEM ENGINEERING Q2C 37298318

SHORT-CIRCUIT

EVALUATION TABLE Q

EQUIP. DESCRIPTION LOWEST RATED DEVICE MAXIMUM LINE SIDE 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 SCA OR DUTY RATIO DEVICE RATING EVALUATION # 005 BLDG 31 SWGR1 4160 SCCR41 41,000 19,818 8.80 Adequate 006 SELECTOR SW-BLDG 8 4160 SCCR63 63,000 18,584 7.48 Adequate 007 ATS1 4160 SCCR40 40 000 18 310 7 28 Adeq ate007 ATS1 4160 SCCR40 40,000 18,310 7.28 Adequate

008 GEN-BLDG 8 BUS 4160 #N/A 3,692 20.00 #N/A 1

009 SELECTOR SW 1 BLDG1 4160 CLE 450X/HVL 50,000 18,374 6.62 Adequate 010 SELECTOR SW 2 BLDG1 4160 CLE 450X/HVL 50,000 18,374 6.62 Adequate

011 ATS-BT EQ 480 #N/A 62,406 8.89 #N/A 1

012 SELECTOR SW-PKG GAR 4160 SCCR25 25,000 16,097 4.80 Adequate 013 FISHER MAIN DISC 208 HEV DUTY SS-R 200,000 12,411 2.47 Adequate 014 FISHER MAIN PNL 208 SCCR10 10 000 13 314 2 44 INADEQUATE014 FISHER MAIN PNL 208 SCCR10 10,000 13,314 2.44 INADEQUATE 015 PP1 208 THQB 10,000 11,759 2.29 SERIES RTNG 22 22,000 Adequate 2 016 LP1 208 THQB 10,000 11,403 2.16 SERIES RTNG 22 22,000 Adequate 2 017 HP1 208 THQB 10,000 11,062 2.05 SERIES RTNG 22 22,000 Adequate 2 018 SSL.1 208 QO-VH 22,000 14,624 3.00 Adequate 019 DSEM FDR BRKR 480 LX 65,000 48,243 4.04 Adequate

020 DSEM MAIN 480 TJK6 30,000 40,993 3.36 INADEQUATE

021 EML 208 MG 65,000 14,724 3.73 Adequate0 08 MG 65,000 ,7 3.73 dequa e

022 WBB-11D 480 #N/A 24,469 1.82 #N/A 1

025 ATS 3A N BRKR 480 SCCR50 50,000 20,910 6.59 Adequate

025 GEN 1 480 #N/A 63,252 11.24 #N/A 1

026 GEN 2 480 #N/A 63,252 11.24 #N/A 1

027 GEN 3 480 #N/A 63,252 11.24 #N/A 1

028 GEN 4 480 #N/A 63,252 11.24 #N/A 1

030 ATS 4 480 #N/A 40,855 2.82 #N/A 1

031 ATS 3 480 #N/A 62,765 8.97 #N/A 1

032 ATS 5EC 480 SCCR35 35,000 51,047 4.18 INADEQUATE

0902 2SP2D-18T 208 SCCR10 10,000 6,049 1.13 Adequate 0913 N4A-23J 208 Q2 10,000 6,522 0.80 Adequate 100 BLDG1 SWBD1 480 NWH3 100,000 48,084 5.80 Adequate 101 BLDG 1 SWBD1 480 NWH3 100,000 48,061 5.79 Adequate 102 BLDG1 208V SWGR 208 NWH3 100,000 33,253 4.64 Adequate 103 BLDG1 208V SWGR 208 NWH3 100,000 33,216 4.62 Adequate 125 MPS A 480 SCCR65 65,000 40,799 8.15 Adequate 125 MPS B 480 SCCR65 65,000 40,796 8.15 Adequate 126 PDPHA 480 FD/C-H 35,000 32,824 5.39 Adequate

#N/A = Number not available.

SCET Page 1 of 22

[Form Ver. 3.6]

POWER SYSTEM ENGINEERING Q2C 37298318

SHORT-CIRCUIT

EVALUATION TABLE Q

EQUIP. DESCRIPTION LOWEST RATED DEVICE MAXIMUM LINE SIDE 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 SCA OR DUTY RATIO DEVICE RATING EVALUATION #

127 BHA 480 FDB 14,000 19,107 1.45 INADEQUATE

128 GHA 480 FDB 14,000 19,107 1.45 INADEQUATE

129 1HA 480 FDB 14 000 19 107 1 45 INADEQUATE129 1HA 480 FDB 14,000 19,107 1.45 INADEQUATE

130 2HA 480 FDB 14,000 19,107 1.45 INADEQUATE

131 DSBLA 208 JD/C-H 65,000 23,176 4.82 Adequate 132 BLA 208 SCCR10 10,000 5,024 0.51 Adequate 133 BLB 208 SCCR10 10,000 5,024 0.51 Adequate 134 GLA 208 SCCR10 10,000 7,670 1.20 Adequate 135 GLB 208 SCCR10 10,000 5,450 1.06 Adequate 136 GLC 208 SCCR10 10 000 7 670 1 20 Adequate136 GLC 208 SCCR10 10,000 7,670 1.20 Adequate 137 GLD 208 SCCR10 10,000 5,450 1.06 Adequate 138 1LA 208 SCCR10 10,000 7,095 1.16 Adequate 139 1LB 208 SCCR10 10,000 5,151 1.04 Adequate 140 1LC 208 SCCR10 10,000 6,217 1.11 Adequate 141 1LD 208 SCCR10 10,000 4,394 1.00 Adequate 142 2LA 208 SCCR10 10,000 6,599 1.13 Adequate 143 2LB 208 SCCR10 10 000 4 882 1 02 Adequate143 2LB 208 SCCR10 10,000 4,882 1.02 Adequate 144 2LC 208 SCCR10 10,000 6,599 1.13 Adequate 145 2LD 208 SCCR10 10,000 4,882 1.02 Adequate 146 ATS EQ 480 SCCR35 35,000 28,016 4.19 Adequate 147 PDPHC 480 FD/C-H 35,000 27,588 4.09 Adequate 149 EQBLA 208 SCCR10 10,000 3,983 2.28 Adequate 150 EQGLA 208 SCCR10 10,000 3,831 2.22 Adequate 152 EQ1LB 208 SCCR10 10,000 3,684 2.37 AdequateQ , , q 153 EQ2LB 208 SCCR10 10,000 3,553 2.30 Adequate 154 PDPHB 480 FD/C-H 35,000 32,233 5.24 Adequate 155 ATS LS 480 SCCR35 35,000 24,627 3.54 Adequate 155 EQ1LA 208 SCCR10 10,000 3,554 1.99 Adequate

156 ATS FP CP 480 #N/A 26,971 3.99 #N/A 1

156 EQGLB 208 SCCR10 10,000 3,723 2.29 Adequate 157 LSBHA 480 FD/C-H 35,000 23,841 3.42 Adequate 158 LSBLA 208 SCCR22 22,000 2,157 2.79 Adequate 159 LSGHA 480 FD/C-H 35,000 15,032 1.70 Adequate 160 LS1HA 480 FD/C-H 35,000 6,497 0.47 Adequate

#N/A = Number not available.

SCET Page 2 of 22

POWER SYSTEM ENGINEERING Q2C 37298318

SHORT-CIRCUIT

EVALUATION TABLE Q

EQUIP. DESCRIPTION LOWEST RATED DEVICE MAXIMUM LINE SIDE 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 SCA OR DUTY RATIO DEVICE RATING EVALUATION # 161 LS2HA 480 FD/C-H 35,000 9,357 0.79 Adequate 162 LS2LA 208 SCCR22 22,000 2,084 2.47 Adequate 163 DSGHA 480 SCCR35 35 000 11 326 1 40 Ad t163 DSGHA 480 SCCR35 35,000 11,326 1.40 Adequate 164 DSGHB 480 SCCR35 35,000 19,545 1.65 Adequate 165 ATS ELEV 480 SCCR35 35,000 26,862 3.94 Adequate 166 PDPHD 480 FD/C-H 35,000 25,987 3.77 Adequate 200 MSG Parelleling SWGR 480 SCCR100 100,000 78,228 14.47 Adequate

202 EMDP-1 480 LX 65,000 72,184 10.07 INADEQUATE

203 EMDP-2 480 LX 65,000 72,777 10.26 INADEQUATE

204 EMDP 3 480 LX 65 000 71 982 10 01 INADEQUATE204 EMDP-3 480 LX 65,000 71,982 10.01 INADEQUATE 205 ATS FIREPUMP 480 SCCR100 100,000 12,633 0.64 Adequate 206 SEL SW1 BLDG29 4160 SCCR25 25,000 19,354 7.97 Adequate 207 SEL SW2 BLDG29 4160 SCCR25 25,000 19,354 7.97 Adequate 208 SSA 480 PJ 65,000 28,311 8.16 Adequate 209 SSB 480 LX 65,000 19,377 7.09 Adequate 210 MSG 480 HG 35,000 24,324 20.00 Adequate 211 NDPA 480 HJ 65 000 18 297 3 85 Adequate211 NDPA 480 HJ 65,000 18,297 3.85 Adequate 212 NLPA 208 QO 10,000 951 2.35 Adequate 213 NLPB 208 QO 10,000 596 0.95 Adequate

214 ATS Q1 480 #N/A 22,313 5.39 #N/A 1

215 QDB 480 HG 35,000 21,216 4.86 Adequate 216 QDPA 480 SCCR18 18,000 15,924 3.26 Adequate 218 QLPA 208 SCCR22 22,000 530 2.37 Adequate 219 QDPB 480 SCCR18 18,000 13,366 2.84 AdequateQ , , q 221 QLPB 208 SCCR22 22,000 525 2.26 Adequate 222 QH4A1 480 SCCR18 18,000 14,646 1.47 Adequate 223 QL4A1 208 SCCR22 22,000 1,816 2.51 Adequate 224 QH1A1 480 SCCR18 18,000 6,988 0.55 Adequate 225 QL1A1 208 SCCR22 22,000 1,550 2.01 Adequate 226 QL2A1 208 SCCR22 22,000 1,251 1.12 Adequate 227 QLB 208 SCCR22 22,000 522 2.15 Adequate

228 ATS Q2 480 #N/A 20,025 4.39 #N/A 1

229 QDPBE 480 MG 35,000 18,620 3.94 Adequate 230 NHB 480 SCCR18 18,000 14,924 1.23 Adequate

#N/A = Number not available.

SCET Page 3 of 22

POWER SYSTEM ENGINEERING Q2C 37298318

SHORT-CIRCUIT

EVALUATION TABLE Q

EQUIP. DESCRIPTION LOWEST RATED DEVICE MAXIMUM LINE SIDE 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 SCA OR DUTY RATIO DEVICE RATING EVALUATION # 231 NLB 208 QB 10,000 1,735 2.33 Adequate 232 NH1A3 480 EDB 18,000 12,195 1.51 Adequate 233 NL1A3 208 QB 10 000 2 790 2 58 Ad t233 NL1A3 208 QB 10,000 2,790 2.58 Adequate 235 NH2A3 480 EDB 18,000 14,201 2.93 Adequate 236 NL2A3 208 QD 25,000 3,995 3.01 Adequate 238 NL2A3-1 208 QD 25,000 2,177 2.23 Adequate 239 NH1A2 480 EDB 18,000 12,195 1.51 Adequate 240 NL1A2 208 QB 10,000 2,815 2.65 Adequate 242 NH2A2 480 EDB 18,000 12,195 1.51 Adequate 243 NL2A2 208 QD 25 000 3 942 2 70 Adequate243 NL2A2 208 QD 25,000 3,942 2.70 Adequate 245 NH1A1 480 EDB 18,000 10,874 1.38 Adequate 246 NL1A1 208 QD 25,000 3,745 2.39 Adequate 248 NH2A1 480 SCCR18 18,000 12,630 2.36 Adequate 249 NL2A1 208 QD 25,000 3,937 2.91 Adequate 251 NL2B1 208 SCCR10 10,000 4,438 2.79 Adequate 252 NL2B2 208 SCCR10 10,000 4,438 2.79 Adequate 253 NL2A4 208 SCCR10 10 000 4 438 2 79 Adequate253 NL2A4 208 SCCR10 10,000 4,438 2.79 Adequate 254 NH3A1 480 SCCR18 18,000 12,630 2.36 Adequate 255 NL3A2 208 QD 25,000 3,950 2.94 Adequate 256 NL3A3 208 QD 25,000 3,059 1.97 Adequate 258 NL3A1 208 QD 25,000 2,507 2.73 Adequate 259 NL3B1 208 SCCR10 10,000 1,991 1.73 Adequate 260 NL4A2 208 QD 25,000 3,950 2.94 Adequate 261 NL4A3 208 QD 25,000 3,059 1.97 AdequateQ , , q 263 NL4A1 208 QD 25,000 2,498 2.70 Adequate 264 NL4B1 208 SCCR10 10,000 1,985 1.72 Adequate 265 NL1B1 208 QD 25,000 2,339 2.02 Adequate 267 NH4A1 480 SCCR18 18,000 12,630 2.36 Adequate 268 NH1B1 480 SCCR18 18,000 7,808 0.82 Adequate

269 ATS C 480 #N/A 17,682 7.72 #N/A 1

270 CDB 480 SCCR18 18,000 19,170 5.97 INADEQUATE

271 CLB 208 QD 25,000 1,626 2.48 Adequate 272 CH1A1 480 EDB 18,000 14,446 2.65 Adequate 273 CL1A1 208 QO 10,000 2,657 2.75 Adequate

#N/A = Number not available.

SCET Page 4 of 22

POWER SYSTEM ENGINEERING Q2C 37298318

SHORT-CIRCUIT

EVALUATION TABLE Q

EQUIP. DESCRIPTION LOWEST RATED DEVICE MAXIMUM LINE SIDE 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 SCA OR DUTY RATIO DEVICE RATING EVALUATION # 274 CL1B1 208 SCCR10 10,000 1,761 1.43 Adequate 275 CL2A1 208 SCCR10 10,000 1,761 1.43 Adequate 276 CH2A1 480 EDB 18 000 14 446 2 65 Ad t276 CH2A1 480 EDB 18,000 14,446 2.65 Adequate 277 CL2A1 208 QO 10,000 2,657 2.75 Adequate 278 CL2A2 208 SCCR10 10,000 936 0.50 Adequate 279 CH3A1 480 SCCR18 18,000 14,446 2.65 Adequate 280 CL3A1 208 QO 10,000 3,188 2.73 Adequate 281 CL3A2 208 SCCR10 10,000 1,587 0.84 Adequate 282 CH4A1 480 SCCR18 18,000 14,446 2.65 Adequate 283 CL4A1 208 QO 10 000 2 662 2 76 Adequate283 CL4A1 208 QO 10,000 2,662 2.76 Adequate 284 CL4A2 208 SCCR10 10,000 1,445 0.93 Adequate 285 CH5A1 480 SCCR18 18,000 14,446 2.65 Adequate 286 CL5A1 208 QO 10,000 2,662 2.76 Adequate 287 CL5A2 208 SCCR10 10,000 1,445 0.93 Adequate 288 LH4A1 480 SCCR18 18,000 5,700 0.46 Adequate

289 ATS L 480 #N/A 17,691 3.90 #N/A 1

290 LDB 480 SCCR18 18 000 14 990 2 17 Adequate290 LDB 480 SCCR18 18,000 14,990 2.17 Adequate 291 LL5A1 208 QO 10,000 910 2.16 Adequate 292 LH2A1 480 SCCR18 18,000 11,335 1.30 Adequate 293 LL2A1 208 QO 10,000 927 2.25 Adequate 294 LH3A1 480 SCCR10 10,000 9,345 0.90 Adequate 295 LLB 208 QO 10,000 604 2.64 Adequate 300 MDPY 480 LX 65,000 46,505 5.14 Adequate

301 2HCA 480 KD /C-H 35,000 44,681 4.65 INADEQUATE, , Q

303 2CLA-30F 208 SCCR65 65,000 11,186 3.80 Adequate

304 C2GA-19D 208 #N/A 10,700 3.17 #N/A 1

305 C2GB-19D 208 #N/A 10,235 2.74 #N/A 1

306 C2HA-21D 208 #N/A 10,700 3.17 #N/A 1

307 C2HB-21D 208 #N/A 10,235 2.74 #N/A 1

308 C2KA-26D 208 #N/A 10,700 3.17 #N/A 1

309 C2KB-26D 208 #N/A 10,235 2.74 #N/A 1

310 E2PA-34D 208 #N/A 10,700 3.17 #N/A 1

311 E2PB-34D 208 #N/A 10,235 2.74 #N/A 1

312 E2Q-37D 208 #N/A 10,700 3.17 #N/A 1

#N/A = Number not available.

SCET Page 5 of 22

POWER SYSTEM ENGINEERING Q2C 37298318

SHORT-CIRCUIT

EVALUATION TABLE Q

EQUIP. DESCRIPTION LOWEST RATED DEVICE MAXIMUM LINE SIDE 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 SCA OR DUTY RATIO DEVICE RATING EVALUATION #

313 E2RA-37D 208 #N/A 10,700 3.17 #N/A 1

314 E2RB-37D 208 #N/A 10,235 2.74 #N/A 1

315 C2AF 480 #N/A 43 129 3 78 #N/A 1315 C2AF 480 #N/A 43,129 3.78 #N/A 1

316 S2AC 208 SCCR10 10,000 2,687 2.66 Adequate 317 NBNB 208 SCCR10 10,000 4,490 2.81 Adequate

318 SR-1-18J 480 SCCR30 30,000 42,088 4.15 INADEQUATE

320 NBEMB-23H BASEMNT 480 SCCR25 25,000 32,748 2.24 INADEQUATE

323 WBE 208 SCCR10 10,000 4,064 2.77 Adequate 324 WBF-11D 208 SCCR10 10,000 3,964 2.66 Adequate 1

325 WBB1 11D 480 #N/A 20 716 2 47 #N/A325 WBB1-11D 480 #N/A 20,716 2.47 #N/A

326 NBF-24P 480 SCCR18 18,000 41,647 3.66 INADEQUATE

327 NBFA 480 #N/A 11,453 0.58 #N/A 1

328 MDPX-18K 480 SCCR35 35,000 48,259 5.45 INADEQUATE

329 2HCA 480 #N/A 24,197 1.86 #N/A 1

330 3N1ML 480 SCCR10 10,000 384 2.35 Adequate

331 HVAC 480 SCCR25 25,000 35,956 3.04 INADEQUATE

332 CH 480 #N/A 32 799 2 35 #N/A 1332 CH 480 #N/A 32,799 2.35 #N/A 1

333 CONDENSER 480 #N/A 26,504 1.34 #N/A 1

335 3NIMH 480 #N/A 34,460 2.62 #N/A 1

336 N4MCC 480 CFD6 200,000 17,452 1.17 Adequate 337 N3A-25N 208 SCCR10 10,000 4,580 2.20 Adequate

338 CH AC 480 #N/A 15,552 1.11 #N/A 1

339 WBJ-4F 480 SFH(3P) 35,000 17,629 1.08 Adequate 340 WBH 208 SCCR10 10,000 5,882 2.63 Adequate, , q

341 ATS 1P 480 #N/A 23,185 1.57 #N/A 1

342 BTC2-250 208 SCCR10 10,000 2,651 2.61 Adequate 343 NBEMC-23H BASEMNT 208 SCCR10 10,000 4,660 2.84 Adequate 344 B2BM 208 SCCR10 10,000 4,311 2.43 Adequate 345 NGEM-25-0 208 SCCR10 10,000 2,168 0.69 Adequate 346 N1EMB-23J 208 SCCR10 10,000 3,328 1.51 Adequate 347 C3EM-21E 208 SCCR10 10,000 1,726 2.50 Adequate 349 SR-4-20K 208 THQB 10,000 4,129 2.42 Adequate 350 N1EM 208 SCCR10 10,000 3,111 1.53 Adequate 351 SR5-18K 208 SCCR10 10,000 3,232 1.60 Adequate

#N/A = Number not available.

SCET Page 6 of 22

POWER SYSTEM ENGINEERING Q2C 37298318

SHORT-CIRCUIT

EVALUATION TABLE Q

EQUIP. DESCRIPTION LOWEST RATED DEVICE MAXIMUM LINE SIDE 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 SCA OR DUTY RATIO DEVICE RATING EVALUATION # 352 W1EM-7E 208 SCCR10 10,000 1,884 0.85 Adequate 353 1NEAD-44E 208 SCCR10 10,000 3,128 1.44 Adequate 354 N1EMC 20R 208 SCCR10 10 000 3 942 2 24 Ad t354 N1EMC-20R 208 SCCR10 10,000 3,942 2.24 Adequate 355 N1EME-29Q 208 SCCR10 10,000 2,021 0.90 Adequate 356 N1EMD-31L 208 SCCR10 10,000 2,020 0.80 Adequate

357 SR-2-20G 480 SCCR22 22,000 33,477 2.28 INADEQUATE

358 NBC-25P 480 #N/A 14,597 0.95 #N/A 1

359 PP-A-4L 480 SCCR10 10,000 9,050 0.69 Adequate

360 WBEMA-3G 480 #N/A 12,011 1.20 #N/A 1

361 EBEMA 41F 480 #N/A 15 288 0 97 #N/A 1361 EBEMA-41F 480 #N/A 15,288 0.97 #N/A 1 362 ECEMA-35F 208 SCCR10 10,000 2,819 2.45 Adequate

364 4TH FLR ROOF CTRL 480 #N/A 8,429 0.75 #N/A 1

365 2NEA1-24P 208 SCCR10 10,000 5,201 1.82 Adequate 366 2NEC-29/0 208 SCCR10 10,000 5,201 1.82 Adequate

367 E3EMH-37B 480 #N/A 26,072 1.78 #N/A 1

370 MS2 480 HKD 65,000 60,586 6.11 Adequate 371 MCC-MC2 480 SCCR65 65 000 54 398 4 55 Adequate371 MCC MC2 480 SCCR65 65,000 54,398 4.55 Adequate 372 MCC-MC1 480 SCCR65 65,000 54,398 4.55 Adequate

373 E GND 208 #N/A 32,595 4.40 #N/A 1

374 E1B-35F 208 SCCR10 10,000 29,584 2.53 INADEQUATE

375 E1D-35F 208 SCCR65 65,000 23,417 1.48 Adequate 376 E2C-42D 208 SCCR10 10,000 9,282 1.13 Adequate

377 E2A-35E 208 SCCR10 10,000 30,406 2.78 INADEQUATE

378 E2B-35E 208 SCCR65 65,000 23,086 1.49 Adequate, , q 379 E3A-B37 208 THQD 22,000 12,602 1.31 Adequate

380 E4B-35E 208 SCCR10 10,000 26,161 1.95 INADEQUATE

381 E4A-35E 208 SCCR10 10,000 34,927 3.52 INADEQUATE

382 E5B-35E 208 SCCR10 10,000 25,761 1.95 INADEQUATE

383 E5A-35E 208 SCCR10 10,000 34,221 3.48 INADEQUATE

384 E6B-35E 208 SCCR10 10,000 25,376 1.95 INADEQUATE

385 E6A-35E 208 SCCR10 10,000 33,544 3.44 INADEQUATE

386 E7B-35E 208 SCCR10 10,000 25,003 1.96 INADEQUATE

387 E7A-35E 208 SCCR10 10,000 25,003 1.96 INADEQUATE

388 E8C-35E 208 SCCR10 10,000 30,009 3.03 INADEQUATE

#N/A = Number not available.

SCET Page 7 of 22

POWER SYSTEM ENGINEERING Q2C 37298318

SHORT-CIRCUIT

EVALUATION TABLE Q

EQUIP. DESCRIPTION LOWEST RATED DEVICE MAXIMUM LINE SIDE 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 SCA OR DUTY RATIO DEVICE RATING EVALUATION #

389 E8B-35E 208 SCCR10 10,000 24,638 1.96 INADEQUATE

390 E8A-35E 208 SCCR10 10,000 32,266 3.37 INADEQUATE

391 E9B 35E 208 SCCR10 10 000 24 287 1 96 INADEQUATE391 E9B-35E 208 SCCR10 10,000 24,287 1.96 INADEQUATE

392 E9A-35E 208 SCCR10 10,000 31,662 3.34 INADEQUATE

393 E10B-35E 208 SCCR10 10,000 27,932 2.54 INADEQUATE

394 E10A-35E 208 SCCR10 10,000 31,082 3.31 INADEQUATE

395 E11B-35E 208 SCCR10 10,000 27,478 2.53 INADEQUATE

396 E11A-35E 208 SCCR10 10,000 30,523 3.28 INADEQUATE

397 EGA-T 208 TB4 200,000 25,604 2.44 Adequate 398 E1C 42E 208 TQD 10 000 8 345 1 08 Adequate398 E1C-42E 208 TQD 10,000 8,345 1.08 Adequate

3981 EGA-TAP 208 TB4 200,000 25,604 2.44 Adequate 3982 EBCA-30C 208 HEV DUTY SS-J 200,000 24,041 2.08 Adequate 3986 EBE1-35F 208 HEV DUTY SS-J 200,000 27,651 2.81 Adequate

3987 EBE-35F 208 SCCR10 10,000 20,593 1.34 INADEQUATE

3988 EGB2-35F 208 SCCR10 10,000 16,427 0.72 INADEQUATE

3989 EGF-35F 208 THQB 10,000 21,165 1.86 INADEQUATE

399 E1A-42E 208 TQD 10 000 24 062 1 89 INADEQUATE399 E1A 42E 208 TQD 10,000 24,062 1.89 INADEQUATE

3990 EGG-35F 208 SCCR10 10,000 16,214 1.19 INADEQUATE

3991 SMK-SLTR 208 SCCR10 10,000 16,214 1.19 INADEQUATE

3992 WGB-24B 208 SCCR10 10,000 3,341 0.55 Adequate

3993 EGD, C &L 208 THQB 10,000 23,757 1.47 INADEQUATE

3994 EGL-35F 208 SCCR10 10,000 21,614 1.26 INADEQUATE

3995 EGD-35F 208 THQB 10,000 17,634 0.98 INADEQUATE

3996 EGC-40E 208 SCCR10 10,000 4,248 0.42 Adequate, , q 3997 EBBA-41F 208 THQB 10,000 8,466 0.81 Adequate 3998 EBBB-41F 208 SCCR10 10,000 8,025 0.77 Adequate 400 MDP1-4N 208 SCCR22 22,000 13,197 4.22 Adequate

4000 31PU16-20L 208 SCCR10 10,000 989 0.36 Adequate 4001 31PU17-18L 208 SCCR10 10,000 1,037 0.38 Adequate 4002 31PU18-20L 208 SCCR10 10,000 1,149 0.42 Adequate 4002 31PU19-18K 208 SCCR10 10,000 867 0.32 Adequate 4003 1PU1-12J 208 BQ 10,000 913 0.81 Adequate 4003 EC1A-8P 480 EH(3P) 14,000 9,232 0.43 Adequate 4004 1PU2-12J 208 BQ 10,000 913 0.81 Adequate

#N/A = Number not available.

SCET Page 8 of 22

POWER SYSTEM ENGINEERING Q2C 37298318

SHORT-CIRCUIT

EVALUATION TABLE Q

EQUIP. DESCRIPTION LOWEST RATED DEVICE MAXIMUM LINE SIDE 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 SCA OR DUTY RATIO DEVICE RATING EVALUATION # 4005 1EC1A 208 BA 10,000 1,561 2.26 Adequate 4006 EC2A-12G 480 EH(3P) 14,000 5,756 0.37 Adequate 4007 1EC2A 12G 208 BA 10 000 796 2 31 Ad t4007 1EC2A-12G 208 BA 10,000 796 2.31 Adequate 4008 EC3AB-10S 480 SCCR18 18,000 8,208 0.53 Adequate 4009 1EC3AB1-10S 208 SCCR18 18,000 3,147 1.93 Adequate 400A XFMR 8 SEC BRKR 208 SCCR42 42,000 13,841 4.57 Adequate 401 GAC-4N 208 SCCR10 10,000 4,891 0.45 Adequate

4010 S1C1-5Q 208 SCCR10 10,000 1,522 0.57 Adequate 4011 S1C2-5P 208 SCCR10 10,000 1,289 0.49 Adequate 4012 1EC3AB2 10S 208 SCCR18 18 000 3 132 1 92 Adequate4012 1EC3AB2-10S 208 SCCR18 18,000 3,132 1.92 Adequate 4013 31PU7-13N 208 SCCR10 10,000 658 0.25 Adequate 4014 31PU8-13N 208 SCCR10 10,000 619 0.24 Adequate 4015 31PU9-14P 208 SCCR10 10,000 638 0.24 Adequate 4016 31PU10-14P 208 SCCR10 10,000 1,325 0.49 Adequate 4017 31PU11-14Q 208 SCCR10 10,000 1,438 0.53 Adequate 4018 31PU12-14Q 208 SCCR10 10,000 1,524 0.56 Adequate 4019 31PU13-14Q 208 SCCR10 10 000 1 726 0 64 Adequate4019 31PU13 14Q 208 SCCR10 10,000 1,726 0.64 Adequate 402 AA1N-8P 208 SCCR10 10,000 2,904 0.35 Adequate

4020 31PU14-16P 208 SCCR10 10,000 1,169 0.43 Adequate 4021 31PU15-18Q 208 SCCR10 10,000 1,116 0.42 Adequate 4022 31PU20-17P 208 SCCR10 10,000 1,068 0.40 Adequate 403 S2AA-18J 208 SCCR10 10,000 437 0.09 Adequate 404 S2AB-12G 208 SCCR10 10,000 2,096 0.29 Adequate 405 AA1W-5L 208 SCCR10 10,000 3,230 0.34 Adequate, , q 406 S3AA-18J 208 SCCR10 10,000 1,042 0.21 Adequate 407 AA1S-18J 208 SCCR10 10,000 881 0.15 Adequate 408 N2AA-10P 208 SCCR10 10,000 3,112 0.43 Adequate 409 W2AA-5L 208 SCCR10 10,000 1,925 0.23 Adequate 410 W3AA-10J 208 SCCR10 10,000 2,368 0.37 Adequate 411 E3AA-14S 208 SCCR10 10,000 766 0.15 Adequate 412 N3AA-10S 208 SCCR10 10,000 2,321 0.37 Adequate 413 N1AA-8P 208 SCCR10 10,000 3,924 0.50 Adequate 414 GAB-16N 208 SCCR10 10,000 2,277 0.36 Adequate 415 AA1E-14P 208 SCCR10 10,000 2,467 0.38 Adequate

#N/A = Number not available.

SCET Page 9 of 22

POWER SYSTEM ENGINEERING Q2C 37298318

SHORT-CIRCUIT

EVALUATION TABLE Q

EQUIP. DESCRIPTION LOWEST RATED DEVICE MAXIMUM LINE SIDE 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 SCA OR DUTY RATIO DEVICE RATING EVALUATION # 416 E1AA-14P 208 SCCR10 10,000 2,631 0.39 Adequate 417 S1AA-18J 208 SCCR10 10,000 1,714 0.32 Adequate 418 E2AA 13P 208 SCCR10 10 000 2 574 0 39 Ad t418 E2AA-13P 208 SCCR10 10,000 2,574 0.39 Adequate 419 GAA-16N 208 SCCR10 10,000 4,563 0.85 Adequate 420 W1AA-5L 208 SCCR10 10,000 6,902 1.02 Adequate 421 GWA-7D 208 SCCR10 10,000 5,198 0.92 Adequate 422 GWC-7D 208 SCCR10 10,000 5,702 1.06 Adequate 423 GWB-7D 208 SCCR10 10,000 5,198 0.92 Adequate 425 MDP3-4N 480 SCCR30 30,000 15,146 5.78 Adequate

425A XFMR 7 SEC BRKR 480 SCCR42 42 000 15 662 6 12 Adequate425A XFMR 7 SEC BRKR 480 SCCR42 42,000 15,662 6.12 Adequate 426 C3AY-14S 480 SCCR30 30,000 8,023 1.75 Adequate 427 3NX-22L 480 SCCR30 30,000 8,468 2.08 Adequate 428 C1AY-14P 480 SCCR30 30,000 12,158 3.65 Adequate 432 C1AX-8P 480 SCCR30 30,000 13,294 4.39 Adequate 433 MR1A-5F 480 FD/C-H 35,000 7,404 1.06 Adequate 434 MR1A1-5F 208 SCCR10 10,000 1,486 1.96 Adequate 435 POW DIST CAB 480 #N/A 7 158 1 01 #N/A 1435 POW DIST CAB 480 #N/A 7,158 1.01 #N/A 1

444 ATS 3A 480 #N/A 57,661 5.97 #N/A 1

445 EQM-3N 480 HJ 65,000 58,419 5.64 Adequate

446 MCC2-10P 480 #N/A 33,517 2.88 #N/A 1

447 MCC2-Ch1 480 #N/A 28,453 2.60 #N/A 1 448 MCC2-Ch2 480 #N/A 28,453 2.60 #N/A 1

449 EQM2X-13P 480 #N/A 55,039 4.54 #N/A 1

450 EQA-3N1 208 SCCR22 22,000 1,608 2.56 AdequateQ , , q 451 E2EMC-21E 208 SCCR22 22,000 2,611 1.13 Adequate

452 MDP2-4N 480 FDB 14,000 23,060 6.55 INADEQUATE

453 A/C Xray 480 LC 65,000 4,963 0.40 Adequate 454 C1AB-8P 480 EH(3P) 14,000 2,627 0.20 Adequate 455 C1AD-18J 480 EH(3P) 14,000 1,121 0.12 Adequate 456 C2AA-5L 480 EH(3P) 14,000 3,404 0.24 Adequate 457 C2AB-10P 480 EH(3P) 14,000 2,011 0.16 Adequate 458 C2AC-13P 480 EH(3P) 14,000 2,731 0.20 Adequate 459 C2AD-18J 480 EH(3P) 14,000 1,052 0.12 Adequate 460 C2AE-12G 480 EH(3P) 14,000 1,396 0.13 Adequate

#N/A = Number not available.

SCET Page 10 of 22

POWER SYSTEM ENGINEERING Q2C 37298318

SHORT-CIRCUIT

EVALUATION TABLE Q

EQUIP. DESCRIPTION LOWEST RATED DEVICE MAXIMUM LINE SIDE 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 SCA OR DUTY RATIO DEVICE RATING EVALUATION # 461 C3AB-10S 480 EH(3P) 14,000 1,425 0.13 Adequate 462 C3AD-18J 480 EH(3P) 14,000 1,021 0.11 Adequate 463 C1AA 5L 480 EH(3P) 14 000 5 966 0 41 Ad t463 C1AA-5L 480 EH(3P) 14,000 5,966 0.41 Adequate 464 C3AA-10J 480 EH(3P) 14,000 5,678 0.51 Adequate 465 C1AC-14P 480 EH(3P) 14,000 2,479 0.22 Adequate 466 C3AC-14S 480 EH(3P) 14,000 4,026 0.41 Adequate 467 AGA-16N 480 EH(3P) 14,000 9,625 1.14 Adequate

467 ATS EK7 480 SCCR35 35,000 41,361 1.78 INADEQUATE

468 AGA-1(16N) 480 SCCR10 10,000 1,408 2.56 Adequate 468 EK7 21F 208 HEV DUTY SS R 200 000 3 620 1 87 Adequate468 EK7-21F 208 HEV DUTY SS-R 200,000 3,620 1.87 Adequate 469 MCC1-10P 480 HFD 65,000 10,710 1.21 Adequate

470 AHU-AC10 480 #N/A 6,501 0.82 #N/A 1

471 ATS 6CS L 480 SCCR35 35,000 32,988 0.97 Adequate

472 ELM-3P1 480 EH(3P) 14,000 30,884 0.90 INADEQUATE

473 ELGA-3DP1 480 EH(3P) 14,000 26,911 0.73 INADEQUATE

474 EL1A-8P 480 EH(3P) 14,000 2,548 0.11 Adequate 475 EL2A-12G 480 EH(3P) 14 000 1 142 0 09 Adequate475 EL2A 12G 480 EH(3P) 14,000 1,142 0.09 Adequate 476 EL3A-10J 480 EH(3P) 14,000 1,344 0.09 Adequate 477 ELGB-16N 480 EH(3P) 14,000 1,491 0.09 Adequate

478 AGB-4N 480 #N/A 10,005 1.47 #N/A 1

479 W3B-5C 480 FD/C-H 35,000 3,627 0.32 Adequate 480 W1G-3E 480 SCCR10 10,000 1,595 2.23 Adequate 481 W1H-3E 480 SCCR10 10,000 1,592 2.23 Adequate

482 AHUSPD-2 480 #N/A 9,997 0.72 #N/A 1,

483 ET5 FDR 480 SCCR18 18,000 6,541 0.38 Adequate 484 1EC3A1-10J 208 SCCR18 18,000 2,832 1.44 Adequate 485 31PU1-14J 208 SCCR10 10,000 1,450 0.55 Adequate 486 31PU2-13L 208 SCCR10 10,000 1,537 0.58 Adequate 487 31PU3-14J 208 SCCR10 10,000 1,371 0.52 Adequate 488 SR1-1ON 208 SCCR10 10,000 1,584 0.60 Adequate 489 SR2-10N 208 SCCR10 10,000 1,686 0.64 Adequate 490 M1C1-5L 208 SCCR10 10,000 1,686 0.64 Adequate 491 M1C2-5J 208 SCCR10 10,000 1,801 0.69 Adequate

492 ECM-3N 480 EH(3P) 14,000 39,118 1.29 INADEQUATE

#N/A = Number not available.

SCET Page 11 of 22

POWER SYSTEM ENGINEERING Q2C 37298318

SHORT-CIRCUIT

EVALUATION TABLE Q

EQUIP. DESCRIPTION LOWEST RATED DEVICE MAXIMUM LINE SIDE 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 SCA OR DUTY RATIO DEVICE RATING EVALUATION # 493 EC2A3-5L 480 EH(3P) 14,000 12,770 0.54 Adequate 494 2EC2A-5L 208 BA 10,000 3,278 2.32 Adequate 495 2EC1A 5L 208 BA 10 000 3 197 2 24 Ad t495 2EC1A-5L 208 BA 10,000 3,197 2.24 Adequate 496 E1CGA 208 SCCR22 22,000 4,678 2.67 Adequate 497 N3EC-22L 208 SCCR18 18,000 1,668 0.63 Adequate 500 DIS SW MS 480 SGH6 35,000 16,358 6.08 Adequate

500A XFMR-10 PRI SEL SW 4160 SCCR50 50,000 19,372 8.00 Adequate 500B XFMR-10 SEC BRKR 480 TKM12 30,000 16,486 6.14 Adequate 501 W5AP1 480 THED(3P)/15-100A 25,000 14,148 3.95 Adequate 502 W5AR1 208 THQD 22 000 2 126 2 83 Adequate502 W5AR1 208 THQD 22,000 2,126 2.83 Adequate 503 W5AR2 208 THQD 22,000 2,113 2.79 Adequate 504 W5AR3 208 THQD 22,000 2,100 2.76 Adequate 505 W4AP1 480 THED(3P)/15-100A 25,000 14,148…