SUBMITTAL TRANSMITTAL OCPS CLAY SPRINGS ES REVIEWED SUBMITTAL NUMBER: SUBMITTAL DETAILS: CONTRACTOR/CM:

Transcription

1 OCPS CLAY SPRINGS ES SUBMITTAL DETAILS: SUBJECT: POWER STUDY BUILDING REFERENCE: DATE RECIEVED: Nov 07, 2014 DISCIPLINE: Electrical PRIORITY STATUS: 2-STANDARD SPECIFICATION REF: REVIEWER DUE DATE: 11/19/2014 DWG REF. NONE DWG TITLE: RETURNED ITEMS: NO OF ITEMS: ITEM DESCRIPTI CONTRACTOR/CM: SUBMITTAL TRANSMITTAL SUBMITTAL NUMBER: : WILLIAMS COMPANY : BRAD KUBIN 2301 SILVER STAR RD. ORLANDO, FL, (407) FAX:(407) DATE RETURNED TO CM: 11/10/ Product Literature(s) REVIEW STATUS: REVIEWED REVIEWERS: PRIMARY: SECONDARY: TAD RIVENBARK MATERN ENGINEERING PHN: (407) FAX: (407) trivenbark@matern.net KEVIN KING MATERN ENGINEERING PHN: (407) FAX: (407) kking@matern.net COMMENTS: cc: OWNER : CALVIN WOOLFOLK 6501 MAGIC WAY, BLDG. 200 ORLANDO, FL, (407) FAX:(407) R+B FILE: : X6 RHODES + BRITO ARCHITECTS INC. : 605 E. ROBINSON STREET, SUITE 750 : ORLANDO, FL. : : : FAX PAGE 1 OF 1

2 SHOP DRAWING COMMENTS Date: October 10, 2014 Project: OCPS Clay Springs E.S. By: Tad Rivenbark Proj. No: Submittal: Power System Study THE FOLLOWING COMMENTS SHALL BE CONSIDERED AN INTEGRAL PART OF THE SHOP DRAWING AND/OR PRODUCT DATA SUBMITTAL. ACTION CODE KEY A B C D E N No exceptions taken. Make corrections noted. Revise and Resubmit. Submit Specified Item. Rejected. Review not required : No Exceptions Noted. END OF SHOP DRAWING COMMENTS Corporate Office: 130 Candace Drive, Maitland, Florida Phone: Orlando Fort Myers Jacksonville Tampa Page 1 of 1

3 OCPS CLAY SPRINGS ES SUBMITTAL DETAILS: SUBJECT: POWER STUDY DATE RFI RECIEVED: Nov 07, 2014 DISCIPLINE: Electrical PRIORITY STATUS: 2-STANDARD SPECIFICATION REF: REVIEWER DUE DATE: 11/19/2014 DWG REF. NONE DWG TITLE: SUBMITTAL CONTENTS: NO OF ITEMS: ITEM DESCRIPTION 1 PRODUCT LITERATURE(S) REVIEWERS: PRIMARY: SECONDARY: SUBMITTAL ASSIGNMENT MEMO TAD RIVENBARK SUBMITTAL NUMBER: MATERN ENGINEERING PHN: (407) FAX: (407) trivenbark@matern.net KEVIN KING MATERN ENGINEERING PHN: (407) FAX: (407) kking@matern.net REVIEW STATUS: REVIEWED FURNISHED AS MARKED REVISE AND RESUBMIT RE-SUBMIT WITH ITEMS NOT REVIEWED REJECTED THIS SUBMITTAL IS ISSUED TO YOU FOR YOUR REVIEW. PLEASE RESPOND AND RETURN...WITH THIS COMPLETED SAM TRANSMITTAL...TO MICHELE BUDAY-URDANETA NO LATER THAN: 11/19/2014. PLEASE COMPLETE REVIEW STATUS AT RIGHT COMMENTS: THIS SUBMITTAL WAS REVIEWED BY : (please print) cc: OWNER : CALVIN WOOLFOLK 6501 MAGIC WAY, BLDG. 200 ORLANDO, FL, CONTR/CM: : WILLIAMS COMPANY : BRAD KUBIN 2301 SILVER STAR RD. R+B FILE: : X6

4 Submittal Approval Form PROJECT: CLAY SPRINGS ELEMENTARY SCHOOL DATE: 11/6/14 SUBCONTRACTOR NAME: Tri City Electric SUBCONTRATOR ADDRESS: NUMBER AND TITLE OF SPECIFICATION SECTION: Power Study Contractor s Submittal Stamp Architect/ Engineer s Submittal Stamp 11/6/14

5 430 West Drive Altamonte Springs, Florida EC Phone: (407) CLAY SPRINGS ELEMENTARY SCHOOL TCE JOB # OWNER: Orange County Public Schools Design & Construction Bldg. 200, 6501 Magic Way Orlando, FL GENERAL CONTRACTOR: Williams Company 2301 Silver Star Road Orlando, FL ARCHITECT: Rhodes + Brito Architects 605 E. Robinson Street, Suite 750 Orlando, FL ENGINEER: Matern Professional Engineering, Inc. 130 Candace Drive Maitland, FL SUBCONTRACTOR: Tri-City Electrical Contractors, Inc. 430 West Drive Altamonte Springs, FL Specification Section: Power System Study Submittal Cover.doc ABC ACCREDITED QUALITY CONTRACTOR EC

6 ELECTRICAL SERVICES & SYSTEMS 9436 Southridge Park, Ct #100 Orlando, FL GENERAL ORDER NUMBER: IMI REPORT NUMBER: TQSIMI SUBMITTED BY: W. NULL, P.E. SHORT CIRCUIT STUDY PROTECTIVE DEVICE COORDINATION STUDY FOR CLAY SPRINGS ELEMENTARY SCHOOL ORLANDO, FL OCTOBER, 2014

7 REVISION HISTORY Rev # Issued Update Description - 10/2014 Initial Study Issue

8 1.0 EXECUTIVE SUMMARY Objectives Results Recommendations SHORT-CIRCUIT ANALYSIS Short-Circuit Objectives System Modeling Short-Circuit Results Equipment Evaluation PROTECTIVE DEVICE COORDINATION STUDY General Description and Protection Philosophy Coordination Results Coordination Recommendations Time-Current Characteristic Plots RECOMMENDED PROTECTIVE DEVICE SETTINGS A. APPENDIX A SHORT-CIRCUIT INPUT REPORT... A-1 B. APPENDIX B SHORT-CIRCUIT RESULTS... B-1 C. APPENDIX C UTILITY DATA... C-1 D. APPENDIX D ONE-LINE DIAGRAM AND LEGEND... D-1 Clay Springs ES i

9 1.0 EXECUTIVE SUMMARY This report contains the results of analysis performed on the electrical distribution system for the Clay Springs Elementary School in Apopka, FL. The purpose of this study is to evaluate new electrical equipment provided by Eaton, as detailed below. The executive summary contains the description and guide to the rest of the report. In addition, it also contains the recommendations of the entire study. 1.1 Objectives 1. Short-Circuit Study Perform a short-circuit study on the electrical distribution system shown in order to determine the available fault current at pertinent locations throughout the distribution system. The scope of the study includes: Analysis begining at the Duke Energy utility service transformer, through the new distribution service entrance switchboard MDP to downstream distribution equipment. The study continued through the new low voltage panelboards and step-down transformers to the end of line panelboards as depicted on Drawing E501, dated 06/11/2014. Input data used in this study was obtained from the following: Eaton Bill of Material, Electrical Riser Diagram from drawing E501, motor data from contract drawings, with cable and feeder data provided by the Electrical Contractor. The available fault currents determined by the short-circuit study are used in the coordination and device evaluation analysis. 2. Equipment Evaluation Evaluate the short-circuit ratings of new protective devices and other distribution equipment supplied by Eaton under this contract. 3. Coordination Study Develop time-current coordination plots to derive coordinated settings for new equipment and protective devices supplied by Eaton. 4. Recommendations Provide specific recommendations for improving the electrical distribution system performance and correcting any deficiencies found by the studies. Clay Springs ES 1-1

10 1.2 Results 1. Short-Circuit Study Short-circuit currents were calculated for each bus shown on the one-line diagram in Appendix D The upstream transformer size and impedance was provided by the local utility. The following short-circuit study case provided worst-case fault values: Study Case No. 1 Utility Normal Service See Section 2, Appendix A and Appendix B for more information. 2. Equipment Evaluation The Equipment Evaluation is based on the power system worst-case shortcircuit current configuration. The short-circuit ratings of protective devices and other distribution equipment provided under the project scope are evaluated in Section 2, Table 2.1. In summary of Table 2.1, all equipment included in this study has passed the equipment evaluation. The short-circuit withstand ratings of low voltage disconnect switches are not evaluated in this study. Care should be taken in order to ensure that these devices are applied within their UL listed short-circuit withstand ratings. The typical withstand ratings for Eaton disconnect switches (safety switches) range from 10,000 A un-fused to 200,000 A for certain fused types. 3. Coordination Study The time-current coordination plots of the protective overcurrent devices are shown in Section 3. In developing the device settings, consideration was given to both isolation of faults and protection of cables. Efforts were made to provide the best coordination possible with the protective devices supplied under this contract. The referenced plot illustrates the coordination of the listed device with the relevant upstream and downstream protective devices. See Section 3 for more information and Section 4 for adjustable device settings. 4. Suggested Protective Device Settings Settings for the adjustable protective devices supplied by Eaton are shown in Section Recommendations 1. Recommended Settings Adjustable protective device settings should be set according to the settings tables provided in Section 5. Clay Springs ES 1-2

11 2. Testing and Preventative Maintenance It is recommended that regularly scheduled testing and preventative maintenance be performed to ensure that the electrical distribution equipment continues to perform at an optimum level. Testing should entail primary injection testing of all power circuit breakers to verify proper tripping ranges, contact resistance testing, insulation resistance testing and complete switchgear and transformer cleaning and inspection. 3. Periodic Arc Flash Analysis Review It is recommended to provide an arc-flash analysis of this facility in accordance with OSHA and NFPA 70E. The 2012 edition of NFPA 70E includes several new requirements regarding arc flash hazard analysis. One new requirement found in Article 130 is that an arc flash hazard analysis must be updated: Every five years (at minimum) When the electrical system is modified or renovated in any way, including renovations, additions, or subtractions to the system It is recommended that a plan is implemented to schedule a review of the arc flash hazard analysis in a period not to exceed five years, and that a review is performed whenever substantial modifications or renovations take place. Clay Springs ES 1-3

12 2.0 SHORT-CIRCUIT ANALYSIS The short-circuit study determines the fault currents that flow in the system during various fault conditions. The calculated fault currents are used in the device evaluation and coordination studies. See Appendix A and Appendix B for the computer generated input data and output data. The short-circuit calculations were done using A_FAULT, a computer software package by SKM Systems Analysis. The short-circuit analysis performed by A_FAULT is based on IEEE Std C , IEEE Std C , and IEEE Std C The fault currents reported in the Fault Report are applicable to low voltage devices and components. The fault currents calculated in this report are based on the contribution data derived from IEEE Std C The fault currents are calculated as follows: Motor and generator subtransient reactance values (Xd ) are adjusted per the first cycle duty multipliers described in IEEE Std (Red Book). The complex equivalent circuit impedance, Z, is calculated by network reduction of the Z (complex) network. The momentary symmetrical current = E/Z. The X/R ratio is equal to the equivalent circuit reactance, X, divided by the equivalent circuit resistance, R. The circuit reactance, X is calculated by the reduction of the X (reactive) network and R is calculated by the reduction of the R (resistive) network. Multiplying factors are determined, and used to adjust the calculated symmetrical fault current. The adjusted current is used to evaluate low voltage protective devices. Low voltage output algorithms and output reports reflect NEMA AB-1 molded case breaker de-rating multipliers. Breakers are de-rated for circuits where the power factor is lower than the NEMA test circuit (higher X/R ratio). The multipliers adjust the symmetrical fault current to the value associated with the systems fault point X/R ratio. The adjusted value listed on the report may then be compared directly with the manufacturer's published interrupting rating. 2.1 Short-Circuit Objectives The objective of the short-circuit analysis is to calculate the maximum shortcircuit currents produced by balanced three-phase and unbalanced faults at each bus shown on the one-line diagram in Appendix D. 2.2 System Modeling Short-circuit currents were calculated for a three-phase bolted fault and singleline-to-ground fault at each bus shown on the one-line diagram. The system was modeled for worst-case fault currents. Clay Springs ES 2-1

13 1. Cases: The following short-circuit study case was determined to provide worst-case fault currents: Study Case No. 1 Utility Normal Service, all motors running 2. Utility Information: The upstream fault current information provided by the Utility was used on the 12,470V primary side of the utility transformer: Utility #1 (1000kVA transformer), %Z: 5.32 Three-phase primary fault current: 4,419 A Single-phase primary fault current: 2,936 A Primary system nominal X/R: Assumptions: The following assumptions were used in modeling the power system, and ensure conservative, worst-case results: System voltage is modeled at 100% nominal. Fault values based upon installed transformer and utility system configuration at time of study and is subject to change with utility system additions and modifications. Motors not depicted on the overall one-line and rated less than 50 hp were modeled as lumped groups. All motors were assumed to be running. Cable length to Portables disconnect was assumed at 50 copper material as no type or length was provided. Unless otherwise provided, transformer X/R ratios are obtained from IEEE Std C Typical design impedances and practical max inrush factors published by Eaton were used to model the Eaton dry-type transformers. Complete information regarding the system model used for the computer simulation is included in Appendix A. 2.3 Short-Circuit Results The results of the short-circuit analysis, including calculated branch contributions, are provided in Appendix B. The one-line diagram with referenced bus identification is included in Appendix D. 2.4 Equipment Evaluation The purpose of the equipment evaluation is to compare the maximum calculated short-circuit currents to the short-circuit ratings of protective devices. The comparison is made in order to determine if the device can interrupt or withstand the available fault currents of the electrical system to which the device is applied, as required by NEC-2011, Article and NEC-2011, Article The Clay Springs ES 2-2

14 device evaluation follows the evaluation procedures outlined in IEEE Std C , IEEE Std C , IEEE Std C , IEEE Std C , IEEE Std (Blue Book), and applicable ANSI, NEMA, and UL standards. The results of the short-circuit equipment evaluation are summarized in Table 2.1. The table indicates Bus I.D. (corresponds to bus designations used in the one-line diagram of Appendix D), Manufacturer, Status (Pass, fail, unknown, or marginal), Type (equipment category), Equip Volts, calculated short-circuit duty, the equipment short-circuit rating, the series rating (if applicable), and the maximum duty rating. The maximum duty rating is calculated by: S. C. duty DeviceS. C. Rating 100 If the short-circuit rating of a device is listed as Unknown, a MINIMUM REQUIRED short-circuit rating is listed. All short-circuit current values are reported in units of ka. Low voltage devices: The calculated short-circuit duty is reported under Calc Isc (ka)" and the device short-circuit rating is reported under "Equip Isc (ka)". The calculated duty has been adjusted accordingly per the system X/R and device test X/R. Clay Springs ES 2-3

15 Table Equipment Evaluation Bus I.D. Manufacturer Status Type Bus Calc Equip Series Rating (V) Isc (ka) Isc (ka) Isc (ka) % SWBD-MDP CUTLER-HAMMER Pass LV Switchboard (*N1) PNL-1H1A1 CUTLER-HAMMER Pass LV Panelboard PNL-1H1B1 CUTLER-HAMMER Pass LV Panelboard PNL-1H1C1 CUTLER-HAMMER Pass LV Panelboard PNL-1H2A1 CUTLER-HAMMER Pass LV Panelboard PNL-1H2B1 CUTLER-HAMMER Pass LV Panelboard PNL-1HDP1B1 CUTLER-HAMMER Pass LV Panelboard PNL-1HDP1C1 CUTLER-HAMMER Pass LV Panelboard PNL-1HDP2A1 CUTLER-HAMMER Pass LV Panelboard PNL-1HDP2B1 CUTLER-HAMMER Pass LV Panelboard PNL-1HM1A1 CUTLER-HAMMER Pass LV Panelboard PNL-1HM1B1 CUTLER-HAMMER Pass LV Panelboard PNL-1HM1C1 CUTLER-HAMMER Pass LV Panelboard PNL-1HM2A1 CUTLER-HAMMER Pass LV Panelboard PNL-1HM2B1 CUTLER-HAMMER Pass LV Panelboard PNL-1L1A1 CUTLER-HAMMER Pass LV Panelboard PNL-1L1B1 CUTLER-HAMMER Pass LV Panelboard PNL-1L1C1 CUTLER-HAMMER Pass LV Panelboard PNL-1L1CEP CUTLER-HAMMER Pass LV Panelboard PNL-1L2A1 CUTLER-HAMMER Pass LV Panelboard PNL-1L2B1 CUTLER-HAMMER Pass LV Panelboard PNL-1LC1A1 CUTLER-HAMMER Pass LV Panelboard PNL-1LC1B1 CUTLER-HAMMER Pass LV Panelboard PNL-1LC1C1 CUTLER-HAMMER Pass LV Panelboard PNL-1LC2A1 CUTLER-HAMMER Pass LV Panelboard PNL-1LC2B1 CUTLER-HAMMER Pass LV Panelboard PNL-1LK1A1 CUTLER-HAMMER Pass LV Panelboard Note (*N1) System X/R higher than Test X/R, Calc INT ka modified based on low voltage factor. Clay Springs ES 2-4

16 3.0 PROTECTIVE DEVICE COORDINATION STUDY The protective device coordination study determines overcurrent protective relay and circuit breaker settings in order to provide an optimal compromise between protection and selectivity. The coordination plots were developed using SKM System Analysis CAPTOR software. 3.1 General Description and Protection Philosophy Using the appropriate maximum fault currents, the time-current coordination curves were plotted as operating time versus current magnitudes to show protective device tripping and/or clearing characteristics and coordination among these devices. Consideration was given to provide both selective isolation of faults and maximum protection of equipment such as cables, transformers, motors, etc. To achieve the optimum protection and selectivity, the following guidelines were followed throughout the study: Ideally, the settings of any overcurrent device should be high enough to permit the continuous full-load operating capacity of the cables and the equipment they supply, and to ride through system temporary disturbances such as in-rush current. On the other hand, the settings should be low enough to provide overload and short-circuit protection under minimum fault conditions. Considering any two protective devices in series: The maximum available fault current at the downstream device determines the upper limit of the coordination range between these two devices. The minimum available fault current at the downstream device or the pick-up setting of the upstream device determines the lower limit of the coordination range. Series instantaneous devices do not coordinate unless there is sufficient impedance between the two devices. When plotting coordination curves, certain time intervals must be maintained between the curves in order to ensure correct selectivity. These time intervals vary, depending on the device types. In general, however, the following must be taken into consideration when determining the appropriate time separation interval: Breaker clearing time, relay tolerances, induction disk over-travel, and a reasonable safety margin for error. 3.2 Coordination Results As shown on the time-current plots, each device curve is tagged with an arrow and label referencing its location on the plot's individual representative one-line diagram. This label also references the device to its specific manufacturer information, including ratings and settings, as indicated in the text box on each Clay Springs ES 3-1

17 plot. The device time-current characteristics are truncated at maximum throughfault current for a downstream fault. In cases involving redundant protective devices, regardless of which device opens, the same system outage occurs. Often, in order to improve overall system protection and coordination, redundant devices are intentionally set to overlap (i.e. non-selectively coordinate with) one another. 3.3 Coordination Recommendations All of the adjustable low voltage electronic trip and thermal magnetic circuit breakers should be tested and adjusted according to the recommended settings given in Section 4. 02_MDP_PNL-1HM2B1: It is noted that breakers BKR-1HDP2B1 and BKR- 1HM2B1 overlapping in the long time region. This is due to the instantaneous on adjustable charachteristics of the breakers. Although the coordination is acceptable given that the conflict occurs after 2 seconds which is a long time for recommended to revise breaker BKR-1HDP2B1 to include an adjustable LS electronic trip unit.fault to be continuous. In order to improve coordianation, it is 3.4 Time-Current Characteristic Plots Refer to the following pages for the plotted coordination curves, which graphically indicate the degree of selectivity and protection obtained. In some cases, a single time-current curve may be applicable to several locations in the system, where each location utilizes substantially similar devices, and serves similar loads. The following list references the attached time-current curves for this report. Table 3.1 TCC Plots Index 01_MDP_MTR-CH-2.tcc Page _MDP_PNL-1HM2B1.tcc Page _1HDP2A1_1LC2A1.tcc Page _MDP_PNL-1HM1C1.tcc Page _1HDP1B1_1HM1B1.tcc Page _PNL-1L1C1.tcc Page 3-8 Clay Springs ES 3-2

18 CURRENT IN AMPERES CBL-MDP 100 1K BKR-MDP-MN CUTLER-HAMMER LSI, , UL TYPE: RG, 310+ Sensor/Trip: 2500A, Phase Ir for In = 2500A H (2500A) LTD (2-24 Sec.) 10 STPU 2500AS (2-6 x Ir) 3 (7500A) STD (Inst-300ms) 300ms INST OR Fixed (17.5kA) (17500A) 10K BKR-CH-2 CUTLER-HAMMER A TYPE: HKD Sensor/Trip: 300A, Phase Thermal Curve (Fixed) INST (5-10 x Trip) 8.25 (2475A) CBL-MDP Size: 600 AWG/kcmil Qty/Ph: 6 10 MTR-CH hp TIME IN SECONDS P S TX-UTIL CLAY SPRINGS 1 CBL-MDP BKR-MDP-MN SWBD-MDP 0.10 BKR-CH-2 MTR-CH Eaton Electrical Services and Systems October 24, 2014 Plot name: 01_MDP_MTR-CH-2 Ref. Voltage: 480V Current Scale: x 10 Clay Springs ES 3-3

19 CURRENT IN AMPERES BKR-1HDP2B1 CUTLER-HAMMER A TYPE: HMDL Sensor/Trip: 700A, Phase Thermal Curve (Fixed) INST (4-8 x Trip) 8 (5600A) CBL-1HM2B1 CBL-1HDP2B K BKR-MDP-MN CUTLER-HAMMER LSI, , UL TYPE: RG, 310+ Sensor/Trip: 2500A, Phase Ir for In = 2500A H (2500A) LTD (2-24 Sec.) 10 STPU 2500AS (2-6 x Ir) 3 (7500A) STD (Inst-300ms) 300ms INST OR Fixed (17.5kA) (17500A) 10K 1000 BKR-1HM2B1 CUTLER-HAMMER A TYPE: LGH/LGE Sensor/Trip: 500A, Phase Thermal Curve (Fixed) INST (5-10 x Trip) 7.5 (3750A) 100 BKR-1HM2B1-CKT CUTLER-HAMMER A TYPE: HFD Sensor/Trip: 225A, Phase Fixed 10 CBL-1HM2B1 Size: 350 AWG/kcmil Qty/Ph: 2 TIME IN SECONDS BKR-MDP-MN SWBD-MDP CBL-1HDP2B1 Size: 300 AWG/kcmil Qty/Ph: 3 1 BKR-1HDP2B1 CBL-1HDP2B1 PNL-1HDP2B BKR-1HM2B1 CBL-1HM2B1 PNL-1HM2B1 BKR-1HM2B1-CKT 0.01 Eaton Electrical Services and Systems October 24, 2014 Plot name: 02_MDP_PNL-1HM2B1 Ref. Voltage: 480V Current Scale: x 10 Clay Springs ES 3-4

20 CURRENT IN AMPERES BKR-1LC2A1-MN CUTLER-HAMMER A TYPE: HKD Sensor/Trip: 350A, Phase Thermal Curve (Fixed) INST (5-10 x Trip) 5 (1750A) CBL-1HDP2A1 CBL-TX-1LC2A1 TX-1LC2A1 CBL-1LC2A K BKR-1HDP2A1 CUTLER-HAMMER A TYPE: HKD Sensor/Trip: 350A, Phase Thermal Curve (Fixed) INST (5-10 x Trip) 10 (3500A) 10K 1000 BKR-TX-1LC2A1 CUTLER-HAMMER A TYPE: HFD Sensor/Trip: 150A, Phase Fixed 100 BKR-1LC2A1-CKT CUTLER-HAMMER A TYPE: BAB, 3-Pole Sensor/Trip: 30A, Phase Fixed 10 TX-1LC2A1 113 kva 480 / 208 V CBL-1HDP2A1 Size: 400 AWG/kcmil Qty/Ph: 2 TIME IN SECONDS BKR-1HDP2A1 CBL-TX-1LC2A1 Size: 1/0 AWG/kcmil Qty/Ph: 1 1 CBL-1HDP2A1 PNL-1HDP2A1 CBL-1LC2A1 Size: 250 AWG/kcmil Qty/Ph: 2 BKR-TX-1LC2A1 CBL-TX-1LC2A1 P TX-1LC2A1 S TX Inrush 0.10 CBL-1LC2A1 BKR-1LC2A1-MN PNL-1LC2A1 BKR-1LC2A1-CKT 0.01 Eaton Electrical Services and Systems October 24, 2014 Plot name: 03_1HDP2A1_1LC2A1 Ref. Voltage: 480V Current Scale: x 10 Clay Springs ES 3-5

21 CURRENT IN AMPERES BKR-1HDP1C1 CUTLER-HAMMER A TYPE: HKD Sensor/Trip: 300A, Phase Thermal Curve (Fixed) INST (5-10 x Trip) 10 (3000A) CBL-1HDP1C1 CBL-1HM1C K BKR-MDP-MN CUTLER-HAMMER LSI, , UL TYPE: RG, 310+ Sensor/Trip: 2500A, Phase Ir for In = 2500A H (2500A) LTD (2-24 Sec.) 10 STPU 2500AS (2-6 x Ir) 3 (7500A) STD (Inst-300ms) 300ms INST OR Fixed (17.5kA) (17500A) 10K 1000 BKR-1HM1C1 CUTLER-HAMMER A TYPE: HFD Sensor/Trip: 100A, Phase Fixed CBL-1HDP1C1 Size: 4/0 AWG/kcmil Qty/Ph: 2 CBL-1HM1C1 Size: 3 AWG/kcmil Qty/Ph: 1 TIME IN SECONDS BKR-MDP-MN 1 SWBD-MDP BKR-1HDP1C1 CBL-1HDP1C1 PNL-1HDP1C BKR-1HM1C1 CBL-1HM1C1 PNL-1HM1C Eaton Electrical Services and Systems October 24, 2014 Plot name: 04_MDP_PNL-1HM1C1 Ref. Voltage: 480V Current Scale: x 10 Clay Springs ES 3-6

22 CURRENT IN AMPERES BKR-1HDP1B1 CUTLER-HAMMER A TYPE: HMDL Sensor/Trip: 800A, Phase Thermal Curve (Fixed) INST (4-8 x Trip) 8 (6400A) CBL-1HDP1B1 CBL-1HM1B K 10K 1000 BKR-1HM1B1 CUTLER-HAMMER A TYPE: HJD Sensor/Trip: 250A, Phase Thermal Curve (Fixed) INST (5-10 x Trip) 10 (2500A) 100 BKR-1HM1B1-CKT CUTLER-HAMMER A TYPE: EHD Sensor/Trip: 70A, Phase Fixed CBL-1HDP1B1 Size: 400 AWG/kcmil Qty/Ph: 3 10 CBL-1HM1B1 Size: 350 AWG/kcmil Qty/Ph: 1 TIME IN SECONDS 1 BKR-1HDP1B1 CBL-1HDP1B1 PNL-1HDP1B1 BKR-1HM1B CBL-1HM1B1 PNL-1HM1B1 BKR-1HM1B1-CKT 0.01 Eaton Electrical Services and Systems October 24, 2014 Plot name: 05_1HDP1B1_1HM1B1 Ref. Voltage: 480V Current Scale: x 10 Clay Springs ES 3-7

23 CURRENT IN AMPERES BKR-1L1C1-MN CUTLER-HAMMER A TYPE: ED Sensor/Trip: 125A, Phase Fixed 100 1K 10K 1000 BKR-1L1C1-CKT CUTLER-HAMMER A TYPE: BAB, 3-Pole Sensor/Trip: 60A, Phase Fixed TIME IN SECONDS 1 BKR-1L1C1-MN PNL-1L1C BKR-1L1C1-CKT 0.01 Eaton Electrical Services and Systems October 24, 2014 Plot name: 06_PNL-1L1C1 Ref. Voltage: 208V Current Scale: x 10 Clay Springs ES 3-8

24 4.0 RECOMMENDED PROTECTIVE DEVICE SETTINGS The following table shows a comprehensive summary of the recommended settings for the adjustable protective devices. Refer to Appendix D for the system one-line diagram. Table Recommended Low-Voltage Protective Device Settings LV Breakers Frame / Recommended Sensor Name/Type Description / Plug Settings BKR-1HDP1B1 CUTLER-HAMMER 800A Phase Thermal Magnetic HMDL 800A Thermal Curve (Fixed) A INST (4-8 x Trip) 8 (6400A) Revised Thermal Curve (Fixed) INST (5-10 x Trip) 10 (4000A) BKR-1HDP1C1 CUTLER-HAMMER 300A Thermal Curve (Fixed) Thermal Magnetic HKD 300A INST (5-10 x Trip) 10 (3000A) A BKR-1HDP2A1 CUTLER-HAMMER 350A Thermal Curve (Fixed) Thermal Magnetic HKD 350A INST (5-10 x Trip) 10 (3500A) A BKR-1HDP2B1 CUTLER-HAMMER 800A Phase Thermal Magnetic HMDL 700A Thermal Curve (Fixed) A INST (4-8 x Trip) 8 (5600A) Revised Thermal Curve (Fixed) INST (5-10 x Trip) 10 (4000A) BKR-1HM1A1-CKT CUTLER-HAMMER 100A Thermal Curve Thermal Magnetic GHB/GHC/GD 80A INST (Fixed) Fixed (1000A) A, 3 Poles BKR-1HM1B1 CUTLER-HAMMER 250A Thermal Curve (Fixed) Thermal Magnetic HJD 250A INST (5-10 x Trip) 10 (2500A) A BKR-1HM2B1 CUTLER-HAMMER 600A Thermal Curve (Fixed) Thermal Magnetic LGH/LGE 500A INST (5-10 x Trip) 7.5 (3750A) A Clay Springs ES 4-1

25 LV Breakers Frame / Recommended Sensor Name/Type Description / Plug Settings BKR-1LC1B1-MN CUTLER-HAMMER 350A Thermal Curve (Fixed) Thermal Magnetic HKD 350A INST (5-10 x Trip) 5 (1750A) A BKR-1LC2A1-MN CUTLER-HAMMER 350A Thermal Curve (Fixed) Thermal Magnetic HKD 350A INST (5-10 x Trip) 5 (1750A) A BKR-1LK1A1-MN CUTLER-HAMMER 350A Thermal Curve (Fixed) Thermal Magnetic DK 350A INST (5-10 x Trip) 5 (1750A) A BKR-CH-1 CUTLER-HAMMER 300A Thermal Curve (Fixed) Thermal Magnetic HKD 300A INST (5-10 x Trip) 10 (3000A) A BKR-CH-2 CUTLER-HAMMER 300A Thermal Curve (Fixed) Thermal Magnetic HKD 300A INST (5-10 x Trip) 8.25 (2475A) A BKR-MDP-MN CUTLER-HAMMER 2500A Phase Static Trip RG, A Ir for In = 2500A H (2500A) LSI, , UL LTD (2-24 Sec.) 10 STPU 2500AS (2-6 x Ir) 3 (7500A) STD (Inst-300ms) 300ms INST OR Fixed (17.5kA) (17500A) Ground GFPU, (0.2-1 x In).6X (600A) GFD, (Inst-300ms) 300ms BKR-PORTABLES CUTLER-HAMMER 400A Thermal Curve (Fixed) Thermal Magnetic HKD 400A INST (5-10 x Trip) 10 (4000A) A, Clay Springs ES 4-2

26 A. APPENDIX A Short-Circuit Input Report Input Report Interpretation Input Data Tables are provided on the following pages. The following is a guide for interpreting the input data. 1. Generation Contribution Data Utility contribution data includes the available fault current in MVA and amps, per unit impedance on a 100 MVA base, X/R, and the line-to-line bus voltage. 2. Motor Contribution Data Motor Contribution Data includes the horsepower rating (base kva rating), speed, subtransient reactance adjusted per the First Cycle Duty multipliers described in IEEE Std (Red Book), per-unit impedance on a 100 MVA base, and the bus voltage. X/R ratios for induction motors are obtained from IEEE Std C Feeder Data Feeder data includes the following cable and bus data: length, impedance in ohms per 1,000 feet, and per-unit impedance on a 100 MVA base. Impedance values for conductors were obtained from Tables 4A-7 and 4A-8 of IEEE Std (Red Book). 4. Transformer Data Transformer data includes the transformer kva rating and per-unit impedance on a 100 MVA base. Unless otherwise provided, transformer X/R ratios are obtained from IEEE Std C Clay Springs ES A-1

27 Clay Springs ES Oct 24, :00:16 Page ALL INFORMATION PRESENTED IS FOR REVIEW, APPROVAL INTERPRETATION AND APPLICATION BY A REGISTERED ENGINEER ONLY SKM DISCLAIMS ANY RESPONSIBILITY AND LIABILITY RESULTING FROM THE USE AND INTERPRETATION OF THIS SOFTWARE SKM POWER*TOOLS FOR WINDOWS INPUT DATA REPORT COPYRIGHT SKM SYSTEMS ANALYSIS, INC ALL PU VALUES ARE EXPRESSED ON A 100 MVA BASE. Clay Springs ES A-2

28 Oct 24, :00:16 Page 2 FEEDER INPUT DATA =============================================================================================================== CABLE FEEDER FROM FEEDER TO QTY VOLTS LENGTH FEEDER NAME NAME NAME /PH L-L SIZE TYPE =============================================================================================================== CBL-1H1A1 SWBD-MDP PNL-1H1A FEET 6 Copper Duct Material: Magnetic Insulation Type: PVC Insulation Class: THWN +/- Impedance: J Ohms/1000 ft J 1.04 PU Z0 Impedance: J Ohms/1000 ft J 2.56 PU CBL-1H1B1 PNL-1HDP1B1 PNL-1H1B FEET 2/0 Aluminum Duct Material: Magnetic Insulation Type: PVC Insulation Class: TW +/- Impedance: J Ohms/1000 ft J PU Z0 Impedance: J Ohms/1000 ft J 1.32 PU CBL-1H1C1 PNL-1HDP1C1 PNL-1H1C FEET 3 Copper Duct Material: Magnetic Insulation Type: PVC Insulation Class: THWN +/- Impedance: J Ohms/1000 ft J PU Z0 Impedance: J Ohms/1000 ft J 1.75 PU CBL-1H2A1 PNL-1HDP2A1 PNL-1H2A FEET 4 Copper Duct Material: Magnetic Insulation Type: PVC Insulation Class: THHN +/- Impedance: J Ohms/1000 ft J 1.15 PU Z0 Impedance: J Ohms/1000 ft J 2.84 PU CBL-1H2B1 PNL-1HDP2B1 PNL-1H2B FEET 4 Copper Duct Material: Magnetic Insulation Type: PVC Insulation Class: THHN +/- Impedance: J Ohms/1000 ft J 1.04 PU Z0 Impedance: J Ohms/1000 ft J 2.57 PU CBL-1HDP1B1 SWBD-MDP PNL-1HDP1B FEET 400 Aluminum Duct Material: Non-Magnetic Insulation Type: PVC Insulation Class: THWN +/- Impedance: J Ohms/1000 ft J 1.05 PU Z0 Impedance: J Ohms/1000 ft J 2.68 PU CBL-1HDP1C1 SWBD-MDP PNL-1HDP1C FEET 4/0 Aluminum Duct Material: Non-Magnetic Insulation Type: PVC Insulation Class: THWN +/- Impedance: J Ohms/1000 ft J 1.08 PU Z0 Impedance: J Ohms/1000 ft J 2.74 PU CBL-1HDP2A1 SWBD-MDP PNL-1HDP2A FEET 400 Aluminum Duct Material: Non-Magnetic Insulation Type: PVC Insulation Class: THWN +/- Impedance: J Ohms/1000 ft J 1.52 PU Z0 Impedance: J Ohms/1000 ft J 3.85 PU CBL-1HDP2B1 SWBD-MDP PNL-1HDP2B FEET 300 Aluminum Duct Material: Non-Magnetic Insulation Type: PVC Insulation Class: THWN +/- Impedance: J Ohms/1000 ft J PU Z0 Impedance: J Ohms/1000 ft J 2.10 PU Clay Springs ES A-3

29 Oct 24, :00:16 Page 3 FEEDER INPUT DATA =============================================================================================================== CABLE FEEDER FROM FEEDER TO QTY VOLTS LENGTH FEEDER NAME NAME NAME /PH L-L SIZE TYPE =============================================================================================================== CBL-1HM1A1 SWBD-MDP PNL-1HM1A FEET 250 Aluminum Duct Material: Magnetic Insulation Type: PVC Insulation Class: THWN +/- Impedance: J Ohms/1000 ft J PU Z0 Impedance: J Ohms/1000 ft J 1.03 PU CBL-1HM1B1 PNL-1HDP1B1 PNL-1HM1B FEET 350 Aluminum Duct Material: Magnetic Insulation Type: PVC Insulation Class: THWN +/- Impedance: J Ohms/1000 ft J PU Z0 Impedance: J Ohms/1000 ft J 1.03 PU CBL-1HM1C1 PNL-1HDP1C1 PNL-1HM1C FEET 3 Copper Duct Material: Magnetic Insulation Type: PVC Insulation Class: THWN +/- Impedance: J Ohms/1000 ft J PU Z0 Impedance: J Ohms/1000 ft J 1.55 PU CBL-1HM2A1 PNL-1HDP2A1 PNL-1HM2A FEET 4/0 Aluminum Duct Material: Magnetic Insulation Type: PVC Insulation Class: THHN +/- Impedance: J Ohms/1000 ft J PU Z0 Impedance: J Ohms/1000 ft J 1.67 PU CBL-1HM2B1 PNL-1HDP2B1 PNL-1HM2B FEET 350 Aluminum Duct Material: Magnetic Insulation Type: PVC Insulation Class: THWN +/- Impedance: J Ohms/1000 ft J PU Z0 Impedance: J Ohms/1000 ft J PU CBL-1L1A1 BUS-0009 PNL-1L1A FEET 300 Aluminum Duct Material: Magnetic Insulation Type: PVC Insulation Class: THWN +/- Impedance: J Ohms/1000 ft J 1.65 PU Z0 Impedance: J Ohms/1000 ft J 4.05 PU CBL-1L1B1 BUS-0041 PNL-1L1B FEET 300 Aluminum Duct Material: Magnetic Insulation Type: PVC Insulation Class: THWN +/- Impedance: J Ohms/1000 ft J 1.65 PU Z0 Impedance: J Ohms/1000 ft J 4.05 PU CBL-1L1C1 BUS-0029 PNL-1L1C FEET 2/0 Aluminum Duct Material: Magnetic Insulation Type: PVC Insulation Class: THWN +/- Impedance: J Ohms/1000 ft J 1.80 PU Z0 Impedance: J Ohms/1000 ft J 4.44 PU CBL-1L1CEP PNL-1L1A1 PNL-1L1CEP FEET 3 Copper Duct Material: Non-Magnetic Insulation Type: PVC Insulation Class: THWN +/- Impedance: J Ohms/1000 ft J PU Z0 Impedance: J Ohms/1000 ft J PU Clay Springs ES A-4

30 Oct 24, :00:16 Page 4 FEEDER INPUT DATA =============================================================================================================== CABLE FEEDER FROM FEEDER TO QTY VOLTS LENGTH FEEDER NAME NAME NAME /PH L-L SIZE TYPE =============================================================================================================== CBL-1L2A1 BUS-0019 PNL-1L2A FEET 3 Copper Duct Material: Magnetic Insulation Type: PVC Insulation Class: THHN +/- Impedance: J Ohms/1000 ft J 2.66 PU Z0 Impedance: J Ohms/1000 ft J 6.55 PU CBL-1L2B1 BUS-0073 PNL-1L2B FEET 3 Copper Duct Material: Magnetic Insulation Type: PVC Insulation Class: THHN +/- Impedance: J Ohms/1000 ft J 3.22 PU Z0 Impedance: J Ohms/1000 ft J 7.93 PU CBL-1LC1A1 BUS-0065 PNL-1LC1A FEET 2 Copper Duct Material: Magnetic Insulation Type: PVC Insulation Class: THHN +/- Impedance: J Ohms/1000 ft J 2.57 PU Z0 Impedance: J Ohms/1000 ft J 6.32 PU CBL-1LC1B1 BUS-0044 PNL-1LC1B FEET 250 Aluminum Duct Material: Magnetic Insulation Type: PVC Insulation Class: THWN +/- Impedance: J Ohms/1000 ft J PU Z0 Impedance: J Ohms/1000 ft J 2.08 PU CBL-1LC1C1 BUS-0032 PNL-1LC1C FEET 400 Aluminum Duct Material: Magnetic Insulation Type: PVC Insulation Class: THWN +/- Impedance: J Ohms/1000 ft J 1.60 PU Z0 Impedance: J Ohms/1000 ft J 3.93 PU CBL-1LC2A1 BUS-0016 PNL-1LC2A FEET 250 Copper Duct Material: Magnetic Insulation Type: PVC Insulation Class: THWN +/- Impedance: J Ohms/1000 ft J 1.09 PU Z0 Impedance: J Ohms/1000 ft J 2.68 PU CBL-1LC2B1 BUS-0076 PNL-1LC2B FEET 400 Aluminum Duct Material: Magnetic Insulation Type: PVC Insulation Class: THWN +/- Impedance: J Ohms/1000 ft J 1.94 PU Z0 Impedance: J Ohms/1000 ft J 4.76 PU CBL-1LK1A1 DSC-1LK1A1 PNL-1LK1A FEET 4/0 Copper Duct Material: Non-Magnetic Insulation Type: PVC Insulation Class: THWN +/- Impedance: J Ohms/1000 ft J 3.45 PU Z0 Impedance: J Ohms/1000 ft J 8.77 PU CBL-DSC 1LK1A1BUS-0061 DSC-1LK1A FEET 4/0 Aluminum Duct Material: Magnetic Insulation Type: PVC Insulation Class: THHN +/- Impedance: J Ohms/1000 ft J 1.31 PU Z0 Impedance: J Ohms/1000 ft J 3.22 PU Clay Springs ES A-5

31 Oct 24, :00:16 Page 5 FEEDER INPUT DATA =============================================================================================================== CABLE FEEDER FROM FEEDER TO QTY VOLTS LENGTH FEEDER NAME NAME NAME /PH L-L SIZE TYPE =============================================================================================================== CBL-MDP BUS-0002 SWBD-MDP FEET 600 Copper Duct Material: Non-Magnetic Insulation Type: PVC Insulation Class: THWN +/- Impedance: J Ohms/1000 ft J PU Z0 Impedance: J Ohms/1000 ft J 1.06 PU CBL-PORTABLES PNL-1HDP1B1 DISC-PORTABLES FEET 500 Copper Duct Material: Non-Magnetic Insulation Type: PVC Insulation Class: THWN +/- Impedance: J Ohms/1000 ft J PU Z0 Impedance: J Ohms/1000 ft J 2.17 PU CBL-TX-1L1A1 SWBD-MDP BUS FEET 3 Copper Duct Material: Magnetic Insulation Type: PVC Insulation Class: THWN +/- Impedance: J Ohms/1000 ft J PU Z0 Impedance: J Ohms/1000 ft J 2.01 PU CBL-TX-1L1B1 PNL-1HDP1B1 BUS FEET 3 Copper Duct Material: Magnetic Insulation Type: PVC Insulation Class: THWN +/- Impedance: J Ohms/1000 ft J PU Z0 Impedance: J Ohms/1000 ft J 2.20 PU CBL-TX-1L1C1 PNL-1HDP1C1 BUS FEET 6 Copper Duct Material: Magnetic Insulation Type: PVC Insulation Class: THWN +/- Impedance: J Ohms/1000 ft J 1.04 PU Z0 Impedance: J Ohms/1000 ft J 2.56 PU CBL-TX-1L1K1 SWBD-MDP BUS FEET 3/0 Aluminum Duct Material: Magnetic Insulation Type: PVC Insulation Class: THWN +/- Impedance: J Ohms/1000 ft J PU Z0 Impedance: J Ohms/1000 ft J 1.33 PU CBL-TX-1L2A1 PNL-1HDP2A1 BUS FEET 8 Copper Duct Material: Magnetic Insulation Type: PVC Insulation Class: THHN +/- Impedance: J Ohms/1000 ft J PU Z0 Impedance: J Ohms/1000 ft J 1.77 PU CBL-TX-1L2B1 PNL-1HDP2B1 BUS FEET 8 Copper Duct Material: Magnetic Insulation Type: PVC Insulation Class: THHN +/- Impedance: J Ohms/1000 ft J PU Z0 Impedance: J Ohms/1000 ft J 1.61 PU CBL-TX-1LC1A1 SWBD-MDP BUS FEET 8 Copper Duct Material: Magnetic Insulation Type: PVC Insulation Class: THWN +/- Impedance: J Ohms/1000 ft J 1.08 PU Z0 Impedance: J Ohms/1000 ft J 2.66 PU Clay Springs ES A-6

32 Oct 24, :00:16 Page 6 FEEDER INPUT DATA =============================================================================================================== CABLE FEEDER FROM FEEDER TO QTY VOLTS LENGTH FEEDER NAME NAME NAME /PH L-L SIZE TYPE =============================================================================================================== CBL-TX-1LC1B1 PNL-1HDP1B1 BUS FEET 3/0 Aluminum Duct Material: Magnetic Insulation Type: PVC Insulation Class: THWN +/- Impedance: J Ohms/1000 ft J PU Z0 Impedance: J Ohms/1000 ft J 1.37 PU CBL-TX-1LC1C1 PNL-1HDP1C1 BUS FEET 3 Copper Duct Material: Magnetic Insulation Type: PVC Insulation Class: THWN +/- Impedance: J Ohms/1000 ft J PU Z0 Impedance: J Ohms/1000 ft J 2.46 PU CBL-TX-1LC2A1 PNL-1HDP2A1 BUS FEET 1/0 Copper Duct Material: Magnetic Insulation Type: PVC Insulation Class: THWN +/- Impedance: J Ohms/1000 ft J PU Z0 Impedance: J Ohms/1000 ft J 1.27 PU CBL-TX-1LC2B1 PNL-1HDP2B1 BUS FEET 3 Copper Duct Material: Magnetic Insulation Type: PVC Insulation Class: THHN +/- Impedance: J Ohms/1000 ft J PU Z0 Impedance: J Ohms/1000 ft J 1.68 PU Clay Springs ES A-7

33 Oct 24, :00:16 Page 7 TRANSFORMER INPUT DATA ============================================================================================= TRANSFORMER PRIMARY RECORD VOLTS * SECONDARY RECORD VOLTS FULL-LOAD NOMINAL NAME NO NAME L-L NO NAME L-L KVA KVA ============================================================================================= TX-1L1A1 BUS-0008 D BUS-0009 YG Pos. Seq. Z%: J 2.30 (Zpu j ) Shell Type Zero Seq. Z%: J 2.30 (Sec j Pri Open) Taps Pri % Sec % Phase Shift (Pri. Leading Sec.): Deg. TX-1L1B1 BUS-0040 D BUS-0041 YG Pos. Seq. Z%: J 2.30 (Zpu j ) Shell Type Zero Seq. Z%: J 2.30 (Sec j Pri Open) Taps Pri % Sec % Phase Shift (Pri. Leading Sec.): Deg. TX-1L1C1 BUS-0028 D BUS-0029 YG Pos. Seq. Z%: J 2.77 (Zpu j ) Shell Type Zero Seq. Z%: J 2.77 (Sec j Pri Open) Taps Pri % Sec % Phase Shift (Pri. Leading Sec.): Deg. TX-1L1K1 BUS-0062 D BUS-0061 YG Pos. Seq. Z%: J 3.88 (Zpu j ) Shell Type Zero Seq. Z%: J 3.88 (Sec j Pri Open) Taps Pri % Sec % Phase Shift (Pri. Leading Sec.): Deg. TX-1L2A1 BUS-0018 D BUS-0019 YG Pos. Seq. Z%: J 3.83 (Zpu j ) Shell Type Zero Seq. Z%: J 3.83 (Sec j Pri Open) Taps Pri % Sec % Phase Shift (Pri. Leading Sec.): Deg. TX-1L2B1 BUS-0072 D BUS-0073 YG Pos. Seq. Z%: J 3.83 (Zpu j ) Shell Type Zero Seq. Z%: J 3.83 (Sec j Pri Open) Taps Pri % Sec % Phase Shift (Pri. Leading Sec.): Deg. Clay Springs ES A-8

34 Oct 24, :00:16 Page 8 TRANSFORMER INPUT DATA ============================================================================================= TRANSFORMER PRIMARY RECORD VOLTS * SECONDARY RECORD VOLTS FULL-LOAD NOMINAL NAME NO NAME L-L NO NAME L-L KVA KVA ============================================================================================= TX-1LC1A1 BUS-0064 D BUS-0065 YG Pos. Seq. Z%: J 2.15 (Zpu j ) Shell Type Zero Seq. Z%: J 2.15 (Sec j Pri Open) Taps Pri % Sec % Phase Shift (Pri. Leading Sec.): Deg. TX-1LC1B1 BUS-0043 D BUS-0044 YG Pos. Seq. Z%: J 2.48 (Zpu j ) Shell Type Zero Seq. Z%: J 2.48 (Sec j Pri Open) Taps Pri % Sec % Phase Shift (Pri. Leading Sec.): Deg. TX-1LC1C1 BUS-0031 D BUS-0032 YG Pos. Seq. Z%: J 3.36 (Zpu j ) Shell Type Zero Seq. Z%: J 3.36 (Sec j Pri Open) Taps Pri % Sec % Phase Shift (Pri. Leading Sec.): Deg. TX-1LC2A1 BUS-0015 D BUS-0016 YG Pos. Seq. Z%: J 2.48 (Zpu j ) Shell Type Zero Seq. Z%: J 2.48 (Sec j Pri Open) Taps Pri % Sec % Phase Shift (Pri. Leading Sec.): Deg. TX-1LC2B1 BUS-0075 D BUS-0076 YG Pos. Seq. Z%: J 3.36 (Zpu j ) Shell Type Zero Seq. Z%: J 3.36 (Sec j Pri Open) Taps Pri % Sec % Phase Shift (Pri. Leading Sec.): Deg. TX-UTIL CLAY S BUS-0001 Y BUS-0002 YG Pos. Seq. Z%: J 5.24 (Zpu j 5.24 ) Shell Type Zero Seq. Z%: J (Sec j Pri Open) Taps Pri % Sec % Phase Shift (Pri. Leading Sec.): Deg. Clay Springs ES A-9

35 Oct 24, :00:16 Page 9 GENERATION CONTRIBUTION DATA ===================================================================================== BUS CONTRIBUTION VOLTAGE NAME NAME L-L MVA X"d X/R ===================================================================================== BUS-0001 UTIL-CLAY SPRI Three Phase Contribution: AMPS 6.61 Single Line to Ground Contribution: AMPS 6.61 Pos Sequence Impedance (100 MVA Base) J 1.04 PU Zero Sequence Impedance (100 MVA Base) J 2.61 PU Clay Springs ES A-10

36 Oct 24, :00:16 Page 10 MOTOR CONTRIBUTION DATA ===================================================================================== BUS CONTRIBUTION VOLTAGE BASE Motor NAME NAME L-L kva X"d X/R Number ===================================================================================== PNL-1HM1A1 MTR-1HM1A Pos Sequence Impedance (100 MVA Base) j PU PNL-1HM1B1 MTR-1HM1B Pos Sequence Impedance (100 MVA Base) j PU PNL-1HM2A1 MTR-1HM2A Pos Sequence Impedance (100 MVA Base) j PU PNL-1HM2B1 MTR-1HM2B Pos Sequence Impedance (100 MVA Base) j PU SWBD-MDP MTR-CH Pos Sequence Impedance (100 MVA Base) j PU SWBD-MDP MTR-CH Pos Sequence Impedance (100 MVA Base) j PU Clay Springs ES A-11

37 B. APPENDIX B Short-Circuit Results Oct 24, :00:16B ALL INFORMATION PRESENTED IS FOR REVIEW, APPROVAL INTERPRETATION AND APPLICATION BY A REGISTERED ENGINEER ONLY SKM DISCLAIMS ANY RESPONSIBILITY AND LIABILITY RESULTING FROM THE USE AND INTERPRETATION OF THIS SOFTWARE SKM POWER*TOOLS FOR WINDOWS A_FAULT SHORT CIRCUIT ANALYSIS REPORT COPYRIGHT SKM SYSTEMS ANALYSIS, INC Clay Springs ES B-1

38 Oct 24, :00:16 THREE PHASE LOW VOLTAGE DUTY PAGE 1 T H R E E P H A S E F A U L T R E P O R T (FOR APPLICATION OF LOW VOLTAGE BREAKERS) PRE FAULT VOLTAGE: MODEL TRANSFORMER TAPS: NO ============================================================================== DISC-PORTABLES 3P Duty: KA AT DEG ( MVA) X/R: 2.10 VOLTAGE: 480. EQUIV. IMPEDANCE= J OHMS LOW VOLTAGE POWER CIRCUIT BREAKER KA MOLDED CASE CIRCUIT BREAKER < 20KA KA MOLDED CASE CIRCUIT BREAKER > 20KA KA CBL-PORTABLES PNL-1HDP1B KA ANG: DSC-1LK1A1 3P Duty: KA AT DEG ( 1.93 MVA) X/R: 1.39 VOLTAGE: 208. EQUIV. IMPEDANCE= J OHMS LOW VOLTAGE POWER CIRCUIT BREAKER KA MOLDED CASE CIRCUIT BREAKER < 10KA KA MOLDED CASE CIRCUIT BREAKER < 20KA KA MOLDED CASE CIRCUIT BREAKER > 20KA KA CBL-DSC 1LK1A1 BUS KA ANG: PNL-1H1A1 3P Duty: KA AT DEG ( 8.97 MVA) X/R: 0.78 VOLTAGE: 480. EQUIV. IMPEDANCE= J OHMS LOW VOLTAGE POWER CIRCUIT BREAKER KA MOLDED CASE CIRCUIT BREAKER < 20KA KA MOLDED CASE CIRCUIT BREAKER > 20KA KA CBL-1H1A1 SWBD-MDP KA ANG: PNL-1H1B1 3P Duty: KA AT DEG ( MVA) X/R: 1.41 VOLTAGE: 480. EQUIV. IMPEDANCE= J OHMS LOW VOLTAGE POWER CIRCUIT BREAKER KA MOLDED CASE CIRCUIT BREAKER < 20KA KA MOLDED CASE CIRCUIT BREAKER > 20KA KA CBL-1H1B1 PNL-1HDP1B KA ANG: PNL-1H1C1 3P Duty: KA AT DEG ( 9.27 MVA) X/R: 0.99 VOLTAGE: 480. EQUIV. IMPEDANCE= J OHMS LOW VOLTAGE POWER CIRCUIT BREAKER KA MOLDED CASE CIRCUIT BREAKER < 20KA KA MOLDED CASE CIRCUIT BREAKER > 20KA KA CBL-1H1C1 PNL-1HDP1C KA ANG: PNL-1H2A1 3P Duty: KA AT DEG ( 7.72 MVA) X/R: 0.87 VOLTAGE: 480. EQUIV. IMPEDANCE= J OHMS LOW VOLTAGE POWER CIRCUIT BREAKER KA MOLDED CASE CIRCUIT BREAKER < 10KA KA MOLDED CASE CIRCUIT BREAKER < 20KA KA MOLDED CASE CIRCUIT BREAKER > 20KA KA CBL-1H2A1 PNL-1HDP2A KA ANG: Clay Springs ES B-2

39 Oct 24, :00:16 THREE PHASE LOW VOLTAGE DUTY PAGE 2 T H R E E P H A S E F A U L T R E P O R T (FOR APPLICATION OF LOW VOLTAGE BREAKERS) PRE FAULT VOLTAGE: MODEL TRANSFORMER TAPS: NO ============================================================================== PNL-1H2B1 3P Duty: KA AT DEG ( 8.82 MVA) X/R: 0.92 VOLTAGE: 480. EQUIV. IMPEDANCE= J OHMS LOW VOLTAGE POWER CIRCUIT BREAKER KA MOLDED CASE CIRCUIT BREAKER < 20KA KA MOLDED CASE CIRCUIT BREAKER > 20KA KA CBL-1H2B1 PNL-1HDP2B KA ANG: PNL-1HDP1B1 3P Duty: KA AT DEG ( MVA) X/R: 2.24 VOLTAGE: 480. EQUIV. IMPEDANCE= J OHMS LOW VOLTAGE POWER CIRCUIT BREAKER KA MOLDED CASE CIRCUIT BREAKER < 20KA KA MOLDED CASE CIRCUIT BREAKER > 20KA KA CBL-1HM1B1 PNL-1HM1B KA ANG: CBL-1HDP1B1 SWBD-MDP KA ANG: PNL-1HDP1C1 3P Duty: KA AT DEG ( MVA) X/R: 1.47 VOLTAGE: 480. EQUIV. IMPEDANCE= J OHMS LOW VOLTAGE POWER CIRCUIT BREAKER KA MOLDED CASE CIRCUIT BREAKER < 20KA KA MOLDED CASE CIRCUIT BREAKER > 20KA KA CBL-1HDP1C1 SWBD-MDP KA ANG: PNL-1HDP2A1 3P Duty: KA AT DEG ( MVA) X/R: 1.87 VOLTAGE: 480. EQUIV. IMPEDANCE= J OHMS LOW VOLTAGE POWER CIRCUIT BREAKER KA MOLDED CASE CIRCUIT BREAKER < 20KA KA MOLDED CASE CIRCUIT BREAKER > 20KA KA CBL-1HM2A1 PNL-1HM2A KA ANG: CBL-1HDP2A1 SWBD-MDP KA ANG: PNL-1HDP2B1 3P Duty: KA AT DEG ( MVA) X/R: 2.21 VOLTAGE: 480. EQUIV. IMPEDANCE= J OHMS LOW VOLTAGE POWER CIRCUIT BREAKER KA MOLDED CASE CIRCUIT BREAKER < 20KA KA MOLDED CASE CIRCUIT BREAKER > 20KA KA CBL-1HM2B1 PNL-1HM2B KA ANG: CBL-1HDP2B1 SWBD-MDP KA ANG: PNL-1HM1A1 3P Duty: KA AT DEG ( MVA) X/R: 3.12 VOLTAGE: 480. EQUIV. IMPEDANCE= J OHMS Clay Springs ES B-3

40 Oct 24, :00:16 THREE PHASE LOW VOLTAGE DUTY PAGE 3 T H R E E P H A S E F A U L T R E P O R T (FOR APPLICATION OF LOW VOLTAGE BREAKERS) PRE FAULT VOLTAGE: MODEL TRANSFORMER TAPS: NO ============================================================================== LOW VOLTAGE POWER CIRCUIT BREAKER KA MOLDED CASE CIRCUIT BREAKER < 20KA KA MOLDED CASE CIRCUIT BREAKER > 20KA KA CONTRIBUTIONS: MTR-1HM1A KA ANG: CBL-1HM1A1 SWBD-MDP KA ANG: PNL-1HM1B1 3P Duty: KA AT DEG ( MVA) X/R: 1.93 VOLTAGE: 480. EQUIV. IMPEDANCE= J OHMS LOW VOLTAGE POWER CIRCUIT BREAKER KA MOLDED CASE CIRCUIT BREAKER < 20KA KA MOLDED CASE CIRCUIT BREAKER > 20KA KA CONTRIBUTIONS: MTR-1HM1B KA ANG: CBL-1HM1B1 PNL-1HDP1B KA ANG: PNL-1HM1C1 3P Duty: KA AT DEG ( 9.52 MVA) X/R: 1.02 VOLTAGE: 480. EQUIV. IMPEDANCE= J OHMS LOW VOLTAGE POWER CIRCUIT BREAKER KA MOLDED CASE CIRCUIT BREAKER < 20KA KA MOLDED CASE CIRCUIT BREAKER > 20KA KA CBL-1HM1C1 PNL-1HDP1C KA ANG: PNL-1HM2A1 3P Duty: KA AT DEG ( MVA) X/R: 1.41 VOLTAGE: 480. EQUIV. IMPEDANCE= J OHMS LOW VOLTAGE POWER CIRCUIT BREAKER KA MOLDED CASE CIRCUIT BREAKER < 20KA KA MOLDED CASE CIRCUIT BREAKER > 20KA KA CONTRIBUTIONS: MTR-1HM2A KA ANG: CBL-1HM2A1 PNL-1HDP2A KA ANG: PNL-1HM2B1 3P Duty: KA AT DEG ( MVA) X/R: 1.96 VOLTAGE: 480. EQUIV. IMPEDANCE= J OHMS LOW VOLTAGE POWER CIRCUIT BREAKER KA MOLDED CASE CIRCUIT BREAKER < 20KA KA MOLDED CASE CIRCUIT BREAKER > 20KA KA CONTRIBUTIONS: MTR-1HM2B KA ANG: CBL-1HM2B1 PNL-1HDP2B KA ANG: PNL-1L1A1 3P Duty: KA AT DEG ( 1.57 MVA) X/R: 0.78 VOLTAGE: 208. EQUIV. IMPEDANCE= J OHMS LOW VOLTAGE POWER CIRCUIT BREAKER KA MOLDED CASE CIRCUIT BREAKER < 10KA KA MOLDED CASE CIRCUIT BREAKER < 20KA KA MOLDED CASE CIRCUIT BREAKER > 20KA KA CBL-1L1A1 BUS KA ANG: Clay Springs ES B-4

41 Oct 24, :00:16 THREE PHASE LOW VOLTAGE DUTY PAGE 4 T H R E E P H A S E F A U L T R E P O R T (FOR APPLICATION OF LOW VOLTAGE BREAKERS) PRE FAULT VOLTAGE: MODEL TRANSFORMER TAPS: NO ============================================================================== PNL-1L1B1 3P Duty: KA AT DEG ( 1.51 MVA) X/R: 0.76 VOLTAGE: 208. EQUIV. IMPEDANCE= J OHMS LOW VOLTAGE POWER CIRCUIT BREAKER KA MOLDED CASE CIRCUIT BREAKER < 10KA KA MOLDED CASE CIRCUIT BREAKER < 20KA KA MOLDED CASE CIRCUIT BREAKER > 20KA KA CBL-1L1B1 BUS KA ANG: PNL-1L1C1 3P Duty: KA AT DEG ( 0.86 MVA) X/R: 0.78 VOLTAGE: 208. EQUIV. IMPEDANCE= J OHMS LOW VOLTAGE POWER CIRCUIT BREAKER KA MOLDED CASE CIRCUIT BREAKER < 10KA KA MOLDED CASE CIRCUIT BREAKER < 20KA KA MOLDED CASE CIRCUIT BREAKER > 20KA KA CBL-1L1C1 BUS KA ANG: PNL-1L1CEP 3P Duty: KA AT DEG ( 0.89 MVA) X/R: 0.51 VOLTAGE: 208. EQUIV. IMPEDANCE= J OHMS LOW VOLTAGE POWER CIRCUIT BREAKER KA MOLDED CASE CIRCUIT BREAKER < 10KA KA MOLDED CASE CIRCUIT BREAKER < 20KA KA MOLDED CASE CIRCUIT BREAKER > 20KA KA CBL-1L1CEP PNL-1L1A KA ANG: PNL-1L2A1 3P Duty: KA AT DEG ( 0.55 MVA) X/R: 1.16 VOLTAGE: 208. EQUIV. IMPEDANCE= J OHMS LOW VOLTAGE POWER CIRCUIT BREAKER KA MOLDED CASE CIRCUIT BREAKER < 10KA KA MOLDED CASE CIRCUIT BREAKER < 20KA KA MOLDED CASE CIRCUIT BREAKER > 20KA KA CBL-1L2A1 BUS KA ANG: PNL-1L2B1 3P Duty: KA AT DEG ( 0.55 MVA) X/R: 1.15 VOLTAGE: 208. EQUIV. IMPEDANCE= J OHMS LOW VOLTAGE POWER CIRCUIT BREAKER KA MOLDED CASE CIRCUIT BREAKER < 10KA KA MOLDED CASE CIRCUIT BREAKER < 20KA KA MOLDED CASE CIRCUIT BREAKER > 20KA KA CBL-1L2B1 BUS KA ANG: PNL-1LC1A1 3P Duty: KA AT DEG ( 0.80 MVA) X/R: 0.85 VOLTAGE: 208. EQUIV. IMPEDANCE= J OHMS Clay Springs ES B-5

42 Oct 24, :00:16 THREE PHASE LOW VOLTAGE DUTY PAGE 5 T H R E E P H A S E F A U L T R E P O R T (FOR APPLICATION OF LOW VOLTAGE BREAKERS) PRE FAULT VOLTAGE: MODEL TRANSFORMER TAPS: NO ============================================================================== LOW VOLTAGE POWER CIRCUIT BREAKER KA MOLDED CASE CIRCUIT BREAKER < 10KA KA MOLDED CASE CIRCUIT BREAKER < 20KA KA MOLDED CASE CIRCUIT BREAKER > 20KA KA CBL-1LC1A1 BUS KA ANG: PNL-1LC1B1 3P Duty: KA AT DEG ( 2.53 MVA) X/R: 1.19 VOLTAGE: 208. EQUIV. IMPEDANCE= J OHMS LOW VOLTAGE POWER CIRCUIT BREAKER KA MOLDED CASE CIRCUIT BREAKER < 10KA KA MOLDED CASE CIRCUIT BREAKER < 20KA KA MOLDED CASE CIRCUIT BREAKER > 20KA KA CBL-1LC1B1 BUS KA ANG: PNL-1LC1C1 3P Duty: KA AT DEG ( 1.42 MVA) X/R: 1.21 VOLTAGE: 208. EQUIV. IMPEDANCE= J OHMS LOW VOLTAGE POWER CIRCUIT BREAKER KA MOLDED CASE CIRCUIT BREAKER < 10KA KA MOLDED CASE CIRCUIT BREAKER < 20KA KA MOLDED CASE CIRCUIT BREAKER > 20KA KA CBL-1LC1C1 BUS KA ANG: PNL-1LC2A1 3P Duty: KA AT DEG ( 2.52 MVA) X/R: 1.24 VOLTAGE: 208. EQUIV. IMPEDANCE= J OHMS LOW VOLTAGE POWER CIRCUIT BREAKER KA MOLDED CASE CIRCUIT BREAKER < 10KA KA MOLDED CASE CIRCUIT BREAKER < 20KA KA MOLDED CASE CIRCUIT BREAKER > 20KA KA CBL-1LC2A1 BUS KA ANG: PNL-1LC2B1 3P Duty: KA AT DEG ( 1.46 MVA) X/R: 1.28 VOLTAGE: 208. EQUIV. IMPEDANCE= J OHMS LOW VOLTAGE POWER CIRCUIT BREAKER KA MOLDED CASE CIRCUIT BREAKER < 10KA KA MOLDED CASE CIRCUIT BREAKER < 20KA KA MOLDED CASE CIRCUIT BREAKER > 20KA KA CBL-1LC2B1 BUS KA ANG: PNL-1LK1A1 3P Duty: KA AT DEG ( 1.72 MVA) X/R: 1.27 VOLTAGE: 208. EQUIV. IMPEDANCE= J OHMS LOW VOLTAGE POWER CIRCUIT BREAKER KA MOLDED CASE CIRCUIT BREAKER < 10KA KA MOLDED CASE CIRCUIT BREAKER < 20KA KA MOLDED CASE CIRCUIT BREAKER > 20KA KA Clay Springs ES B-6

43 Oct 24, :00:16 THREE PHASE LOW VOLTAGE DUTY PAGE 6 T H R E E P H A S E F A U L T R E P O R T (FOR APPLICATION OF LOW VOLTAGE BREAKERS) PRE FAULT VOLTAGE: MODEL TRANSFORMER TAPS: NO ============================================================================== CONTRIBUTIONS TO PNL-1LK1A1 (CONTINUED) CBL-1LK1A1 DSC-1LK1A KA ANG: SWBD-MDP 3P Duty: KA AT DEG ( MVA) X/R: 5.69 VOLTAGE: 480. EQUIV. IMPEDANCE= J OHMS LOW VOLTAGE POWER CIRCUIT BREAKER KA MOLDED CASE CIRCUIT BREAKER > 20KA KA CONTRIBUTIONS: MTR-CH KA ANG: MTR-CH KA ANG: CBL-1HM1A1 PNL-1HM1A KA ANG: CBL-MDP BUS KA ANG: CBL-1HDP2B1 PNL-1HDP2B KA ANG: CBL-1HDP2A1 PNL-1HDP2A KA ANG: CBL-1HDP1B1 PNL-1HDP1B KA ANG: Clay Springs ES B-7

44 Oct 24, :00:16 UNBALANCED LOW VOLTAGE DUTY PAGE 1 U N B A L A N C E D F A U L T R E P O R T (FOR APPLICATION OF LOW VOLTAGE BREAKERS) PRE FAULT VOLTAGE: MODEL TRANSFORMER TAPS: NO ============================================================================== LOCATION FAULT KA X/R EQUIVALENT (PU) ASYM. KA AT 0.5 CYCLES VOLTAGE DUTIES (RMS) FAULT IMPEDANCE * MAX. RMS AVG. RMS * ============================================================================== DISC-PORTABLES 3P Duty: Z1= SLG DUTY: Z2= VOLTS LN/LN: Z0= INFINITE LN/LN/GND: ( GND RETURN KA) DSC-1LK1A1 3P Duty: Z1= SLG DUTY: Z2= VOLTS LN/LN: Z0= LN/LN/GND: ( GND RETURN KA) PNL-1H1A1 3P Duty: Z1= SLG DUTY: Z2= VOLTS LN/LN: Z0= INFINITE LN/LN/GND: ( GND RETURN KA) PNL-1H1B1 3P Duty: Z1= SLG DUTY: Z2= VOLTS LN/LN: Z0= INFINITE LN/LN/GND: ( GND RETURN KA) PNL-1H1C1 3P Duty: Z1= SLG DUTY: Z2= VOLTS LN/LN: Z0= INFINITE LN/LN/GND: ( GND RETURN KA) PNL-1H2A1 3P Duty: Z1= SLG DUTY: Z2= VOLTS LN/LN: Z0= INFINITE LN/LN/GND: ( GND RETURN KA) PNL-1H2B1 3P Duty: Z1= SLG DUTY: Z2= VOLTS LN/LN: Z0= INFINITE LN/LN/GND: ( GND RETURN KA) PNL-1HDP1B1 3P Duty: Z1= SLG DUTY: Z2= VOLTS LN/LN: Z0= INFINITE LN/LN/GND: ( GND RETURN KA) Clay Springs ES B-8

45 Oct 24, :00:16 UNBALANCED LOW VOLTAGE DUTY PAGE 2 U N B A L A N C E D F A U L T R E P O R T (FOR APPLICATION OF LOW VOLTAGE BREAKERS) PRE FAULT VOLTAGE: MODEL TRANSFORMER TAPS: NO ============================================================================== LOCATION FAULT KA X/R EQUIVALENT (PU) ASYM. KA AT 0.5 CYCLES VOLTAGE DUTIES (RMS) FAULT IMPEDANCE * MAX. RMS AVG. RMS * ============================================================================== PNL-1HDP1C1 3P Duty: Z1= SLG DUTY: Z2= VOLTS LN/LN: Z0= INFINITE LN/LN/GND: ( GND RETURN KA) PNL-1HDP2A1 3P Duty: Z1= SLG DUTY: Z2= VOLTS LN/LN: Z0= INFINITE LN/LN/GND: ( GND RETURN KA) PNL-1HDP2B1 3P Duty: Z1= SLG DUTY: Z2= VOLTS LN/LN: Z0= INFINITE LN/LN/GND: ( GND RETURN KA) PNL-1HM1A1 3P Duty: Z1= SLG DUTY: Z2= VOLTS LN/LN: Z0= INFINITE LN/LN/GND: ( GND RETURN KA) PNL-1HM1B1 3P Duty: Z1= SLG DUTY: Z2= VOLTS LN/LN: Z0= INFINITE LN/LN/GND: ( GND RETURN KA) PNL-1HM1C1 3P Duty: Z1= SLG DUTY: Z2= VOLTS LN/LN: Z0= INFINITE LN/LN/GND: ( GND RETURN KA) PNL-1HM2A1 3P Duty: Z1= SLG DUTY: Z2= VOLTS LN/LN: Z0= INFINITE LN/LN/GND: ( GND RETURN KA) PNL-1HM2B1 3P Duty: Z1= SLG DUTY: Z2= VOLTS LN/LN: Z0= INFINITE LN/LN/GND: ( GND RETURN KA) Clay Springs ES B-9

46 Oct 24, :00:16 UNBALANCED LOW VOLTAGE DUTY PAGE 3 U N B A L A N C E D F A U L T R E P O R T (FOR APPLICATION OF LOW VOLTAGE BREAKERS) PRE FAULT VOLTAGE: MODEL TRANSFORMER TAPS: NO ============================================================================== LOCATION FAULT KA X/R EQUIVALENT (PU) ASYM. KA AT 0.5 CYCLES VOLTAGE DUTIES (RMS) FAULT IMPEDANCE * MAX. RMS AVG. RMS * ============================================================================== PNL-1L1A1 3P Duty: Z1= SLG DUTY: Z2= VOLTS LN/LN: Z0= LN/LN/GND: ( GND RETURN KA) PNL-1L1B1 3P Duty: Z1= SLG DUTY: Z2= VOLTS LN/LN: Z0= LN/LN/GND: ( GND RETURN KA) PNL-1L1C1 3P Duty: Z1= SLG DUTY: Z2= VOLTS LN/LN: Z0= LN/LN/GND: ( GND RETURN KA) PNL-1L1CEP 3P Duty: Z1= SLG DUTY: Z2= VOLTS LN/LN: Z0= LN/LN/GND: ( GND RETURN KA) PNL-1L2A1 3P Duty: Z1= SLG DUTY: Z2= VOLTS LN/LN: Z0= LN/LN/GND: ( GND RETURN KA) PNL-1L2B1 3P Duty: Z1= SLG DUTY: Z2= VOLTS LN/LN: Z0= LN/LN/GND: ( GND RETURN KA) PNL-1LC1A1 3P Duty: Z1= SLG DUTY: Z2= VOLTS LN/LN: Z0= LN/LN/GND: ( GND RETURN KA) PNL-1LC1B1 3P Duty: Z1= SLG DUTY: Z2= VOLTS LN/LN: Z0= LN/LN/GND: ( GND RETURN KA) Clay Springs ES B-10

47 Oct 24, :00:16 UNBALANCED LOW VOLTAGE DUTY PAGE 4 U N B A L A N C E D F A U L T R E P O R T (FOR APPLICATION OF LOW VOLTAGE BREAKERS) PRE FAULT VOLTAGE: MODEL TRANSFORMER TAPS: NO ============================================================================== LOCATION FAULT KA X/R EQUIVALENT (PU) ASYM. KA AT 0.5 CYCLES VOLTAGE DUTIES (RMS) FAULT IMPEDANCE * MAX. RMS AVG. RMS * ============================================================================== PNL-1LC1C1 3P Duty: Z1= SLG DUTY: Z2= VOLTS LN/LN: Z0= LN/LN/GND: ( GND RETURN KA) PNL-1LC2A1 3P Duty: Z1= SLG DUTY: Z2= VOLTS LN/LN: Z0= LN/LN/GND: ( GND RETURN KA) PNL-1LC2B1 3P Duty: Z1= SLG DUTY: Z2= VOLTS LN/LN: Z0= LN/LN/GND: ( GND RETURN KA) PNL-1LK1A1 3P Duty: Z1= SLG DUTY: Z2= VOLTS LN/LN: Z0= LN/LN/GND: ( GND RETURN KA) SWBD-MDP 3P Duty: Z1= SLG DUTY: Z2= VOLTS LN/LN: Z0= INFINITE LN/LN/GND: ( GND RETURN KA) Clay Springs ES B-11

48 Oct 24, :00:16 UNBALANCED LOW VOLTAGE DUTY PAGE 5 F A U L T S T U D Y S U M M A R Y (FOR APPLICATION OF LOW VOLTAGE BREAKERS) PRE FAULT VOLTAGE: MODEL TRANSFORMER TAPS: NO BUS RECORD VOLTAGE A V A I L A B L E F A U L T D U T I E S (KA) NO NAME L-L 3 PHASE X/R LINE/GRND X/R ============================================================================== DISC-PORTABLES DSC-1LK1A PNL-1H1A PNL-1H1B PNL-1H1C PNL-1H2A PNL-1H2B PNL-1HDP1B PNL-1HDP1C PNL-1HDP2A PNL-1HDP2B PNL-1HM1A PNL-1HM1B PNL-1HM1C PNL-1HM2A PNL-1HM2B PNL-1L1A PNL-1L1B PNL-1L1C PNL-1L1CEP PNL-1L2A PNL-1L2B PNL-1LC1A PNL-1LC1B PNL-1LC1C PNL-1LC2A PNL-1LC2B PNL-1LK1A SWBD-MDP FAULTED BUSES, 59 BRANCHES, 7 CONTRIBUTIONS UNBALANCED FAULTS REQUESTED *** SHORT CIRCUIT STUDY COMPLETE *** Clay Springs ES B-12

49 C. APPENDIX C Utility Data See Utility Source Data on the attached sheet(s). Clay Springs ES C-1

50 Null, Wilma K From: Sent: To: Subject: Harper, Jeffrey J <Jeffrey.Harper@duke-energy.com> Thursday, October 09, :10 AM Null, Wilma K RE: Clay Springs Elementary School - Power System Study - Fault Data Requested Per your request Primary 3 Phase Fault (LLL actual fault value) _4419 amps Primary Line Ground Fault (LG) = 2936 amps Associated Max Min X/R ratios at the Primary side: 6.61 X/R Nearest upstream phase and ground overcurrent device trip information (if fuse, provide manufacturer, type, amp rating, speed, and nominal system voltage; if relay, provide manufacturer, style, CT ratios, and adjustable settings): 100 A fuse very slow speed Kearney KS at terminal pole. (12.47 KV) Site Utility transformer: 1000 kva. Voltage kv Rating (Primary : Secondary): KV. 480/277 V. Nameplate/Design Impedance %Z: _5.32 (I understand that this can change if the transformer is replaced). Transformer X/R Ration: 5.5 Winding Configuration: Wye Wye From: WilmaKNull@Eaton.com [mailto:wilmaknull@eaton.com] Sent: Wednesday, October 08, :42 PM To: Harper, Jeffrey J Subject: Clay Springs Elementary School - Power System Study - Fault Data Requested *** This is an EXTERNAL . Exercise caution. DO NOT open attachments or click links from unknown senders or unexpected . *** Good afternoon Jeff, I just left a voic on your phone, but would like to follow up regarding the items needed below. As mentioned, I am performing the Short Circuit and Coordination power study for the Clay Springs Elementary School project. As I have not seen any data on the utility transformer or service to be provided, would you please confirm the following items needed from the primary and secondary side of the utility transformer for the study, or forward on to the applicable department? Primary 3 Phase Fault (LLL actual fault value) amps Primary Line Ground Fault (LG) = amps Associated Max Min X/R ratios at the Primary side: X/R Nearest upstream phase and ground overcurrent device trip information (if fuse, provide manufacturer, type, amp rating, speed, and nominal system voltage; if relay, provide manufacturer, style, CT ratios, and adjustable settings) Site Utility transformer: kva. Voltage kv Rating (Primary : Secondary): kv : 480/277V Nameplate/Design Impedance %Z: (I understand that this can change if the transformer is replaced). Transformer X/R Ration: 1

51 Winding Configuration: Please contact me if you have any questions regarding the request above. Thank you! Wilma Wilma Null, P.E. LEED AP, QCxP EESS Power Systems Engineering 408 West University Avenue, Suite 402 Gainesville, FL Ph: