Complete Report - Lebanon VAMC Final Vol 1 P1-344.pdf

Department of Veterans Affairs Lebanon Veterans Affairs Medical Center

Lebanon, Pennsylvania

VISN 4

ELECTRICAL DISTRIBUTION

SYSTEM CONDITION ASSESSMENT

Contract #VA101F-17-D-3080

Final Submission

Prepared by:

E.K. FOX & ASSOCIATES, LTD.

CONSULTING ENGINEERS

4500 Southgate Place, Suite 800, Chantilly, VA 20151

April 27, 2018

Lebanon VAMC – Lebanon, Pennsylvania Electrical Condition Assessment

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TABLE OF CONTENTS

1. EXECUTIVE SUMMARY

2. INTRODUCTION

2.1. Facility Support

2.2. Station Information

2.3. Site Plan

2.4. Medium Voltage Distribution System Overview

2.5. Emergency Power System Overview

2.6. Calculation Methods

2.7. Ground Resistance Test Reports

2.8. Study Assumptions

3. FAULT CURRENT ANALYSIS

3.1. Introduction

3.2. Sources of Fault Current

3.3. Calculation Scenarios

3.4. SKM Power*Tools Input Data Reports

3.5. Short Circuit Calculation Results

3.6. Equipment Evaluation Results

4. PROTECTIVE DEVICE COORDINATION STUDY

4.1. Introduction

4.2. Existing and Proposed Protective Device Settings

4.3. Underrated Feeders

4.4. Replacement System Components

4.5. Analysis and Recommendations

4.6. Time-Current Characteristic Graphs Descriptions and Analysis

4.7. Time-Current Characteristic Graphs

5. VOLTAGE DROP ANALYSIS

5.1. Introduction

5.2. Basis of Evaluation

5.3. Results

5.4. Load Flow Calculations

6. ARC FLASH HAZARD ANALYSIS

6.1. Introduction

6.2. Basis of Study

6.3. Disclaimer

6.4. Results

7. CONDITION ASSESSMENT

7.1. General Information

7.2. Medium Voltage Distribution System

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7.3. Low Voltage Distribution System

7.4. Grounding System

7.5. Emergency/Standby/Essential Electrical System Analysis

7.6. Summary of Costs

7.7. Existing Condition Assessment Photographs.

7.8. Building System Assessment

APPENDICES

A. Site Data and Site Plan B. Available Fault Current Information C. Lebanon VAMC Electrical Load Data D. Minutes of Entrance Briefing and Baseline Review E. Photographs F. Comments and Responses G. VHA Electrical Directive Compliance Survey H. One-Line Diagrams I. Ground Test Reports J. Cost Estimate Detail K. E.K. Fox & Associates, Ltd. - Statement of Work L. Equipment Condition Assessment Sheets

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1. EXECUTIVE SUMMARY

The Department of Veterans Affairs – Office of Construction and Facilities Management (CFM), commissioned AES Group, Inc. and E.K. Fox and Associates, Ltd. (EKFox) to perform the electrical system condition assessment of the Lebanon Veterans Affairs Medical Center (VAMC).

The scope of this assessment is to provide short circuit analysis, protective device coordination study, voltage drop analysis, arc flash hazard analysis, and equipment condition assessment with the purpose of improving the safety and reliability of the electrical distribution system.

EKFox performed an initial onsite survey during November 6-17, 2017 and conducted a follow-up onsite survey from January 8-12, 2018. With some exceptions, we found the overall electrical condition of this facility to be in good condition. We performed calculations and analyses for the electrical power system for the Lebanon VAMC campus, which has five (5) independent utility entrances, and fifteen (15) backup generators for emergency power.

Our short circuit analysis, which aims to identify if circuit breakers can safely interrupt the fault current due to a short, has currently shown fifty-three (53) overcurrent protection devices (OCPD’s) have failed the device evaluation for interrupting capacity. The scope of this analysis included an evaluation of circuit breakers in the downstream panelboards. Section 3 of this report has additional details.

The protective device coordination study uses the current fixed and adjustable settings of the existing OCPD’s to graphically display how those devices will respond to a short or overload event.

The settings are then adjusted to allow the protective device closest to the fault to interrupt the circuit thereby minimizing the disruption of electrical service. Our study identifies forty-two (42) OCPD’s that require settings adjustment or replacement to either better coordinate with other OCPD’s or to provide the correct level of protection for downstream conductors. This report includes a summary of the specific OCPD’s and the recommended changes in Section 4: Protective Device Coordination Study. We also include the time/current characteristic (TCC) graphs, which that show the interaction of the OCPD’s with the existing and recommended settings applied, in Section 4.

EKFox performed a load flow analysis in order to determine voltage drop along the length of the feeders using assumed loads of 50 percent of nameplate rating applied to the primary distribution system, and 80 percent of the equipment nameplate rating applied to certain end-of-line panels.

Using assumed loading, most feeders had a voltage drop that was around 1-3%, and no feeders had a voltage drop above 5%. Additional information can be found in Section 5 of this report.

We also performed an arc flash hazard analysis to determine the incident energy released by an arcing fault at the location of each device in the electrical distribution system. This analysis is also used to determine safe working distances and the required personal protective equipment (PPE) for personnel working in the panel. EKFox will also provide the engineering staff arc flash labels that will warn them of the potential dangers for all panels and equipment and in compliance with NFPA 70E 2015, as required by our statement of work.

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Finally, EKFox performed a condition assessment survey to identify the existing condition and to assess the age of the electrical system equipment. Most of the electrical equipment for the Lebanon VAMC campus is in good condition although some pieces have less than half of their useful life span remaining, and a few pieces of equipment have specific issues that put them in poor or critical condition. The critical condition and code compliance issues were brought to the attention of the site Electrical Foreman as they were discovered and were reiterated during the onsite survey exit briefing. The equipment condition survey details are included in Section 7: Condition Assessment.

Section 7 also includes a summary of the cost (by building) to replace any equipment identified in our assessment.

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2. INTRODUCTION

2.1. Facility Support

The EKFox Team that performed the surveys at Lebanon VAMC and produced this report consisted of highly skilled engineers and technicians. They were:

Raleigh Stewart, PE RDStewart@ekfox.com (877-520-4771 x103)

Charles Sisung, PE CFSisung@ekfox.com (877-520-4771 x105)

Travis Davis TRDavis@ekfox.com

David Schires DGSchires@ekfox.com

Jarrett Elliott JCElliott@ekfox.com

Tasha Laura TJLaura@ekfox.com

Key personnel for the VA have been involved with supporting survey efforts and providing review of these submissions. They are:

Thaddeus Kocuba (Lebanon Facility Manager) Thaddeus.Kocuba2@va.gov (717-272-6621 x4740)

Larry Lau, P.E. (CFM), Contract Officer Representative (COR) and Technical Lead (TL) Larry.Lau@va.gov (202-632-5263)

Gary Krupa, PE (OCAMES), Technical Reviewer, Gary.Krupa@va.gov (402-689-9383)

Joseph Delanko, CAM VISN 4 Joseph.Delanko@va.gov (814-860-2094)

EKFox also hired a local electrical contractor, Cedar Electric, who was instrumental in locating the equipment/panels and opening the covers for the rest of the survey team.

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2.2. Station Information

The Lebanon VAMC is located at 1700 S Lincoln Ave, Lebanon, PA 17042. The following buildings comprise the Lebanon VAMC and the scope of this study:

Building No. Function/Building Name Yr. Built Yr. Reno Floors GSF 1 General Medical and Surgical 1947 2003 7 171934

2 NE CPAC 1947 4 59232

3 Day Care/Emergency Quarters 1947 1995 3 11831 4 HCCL Building 1950 3 5433 5 HCCL Building 1950 3 2786 6 Warehouse 1947 2 15626 7 Laundry 1950 2 12304 8 Motor Pool Garage 1947 2 4689 9 Utility Shops 1947 1 4691 10 Boiler/Chiller 1947 3 9855 11 Storage 1950 2 1163 17 Ambulatory Care 1950 2003 7 118071 18 Behavioral Health / AD Operations 1950 6 115865 19 Admin Services 1950 2010 3 48896 22 Education/Library/Informatics 1950 2003 3 31696 23 Vocational Rehab 1956 2 13464 24 Therapeutic Exercise Clinic 1956 1 20875 25 Outleased - Project Search 1950 3 4606 26 Old Non-Housekeeping Qtrs. 1950 2 7079 27 Office 1950 3 7252 28 Quarters Garage 1950 1 2512 33 Carpentry Shop / Smoking Shelter 1956 1 2390 34 Residential Recovery Center West Building 2013 1 7875 35 Residential Recovery Center Central Building 2013 2 10236 36 Residential Recovery Center East Building 2014 1 5134 37 Center for Veterans Enterprise 2013 3 20719 99 Modular Building 2009 1 16632 100 CWTTR House 1835 3 4337 101 ICU/Emergency Department 2007 1 13985 102 Rehab Medicine Building 2010 1 13239 103 Old Golf House 1831 2 2202 104 Medical/Surgical 2013 2 46788 106 Chapel 1963 1 5135 135 Toilet 1961 1 300 136 Telephone/Computer Equipment 1995 2 4390 137 Hazardous Materials Storage 1990 1 175 138 Engineering Storage 1990 1 3200 139 Storage 1993 1 3057 140 CWT Storage 1994 1 576 141 CWT Storage 1994 1 576 142 Storage 1994 1 2181 143 Storage 1994 1 532 144 MOVE! Program and Clinics 1994 1 1408 154 Engineering Office Trailer 1994 1 480 155 Building 100 Garage 1949 1 286

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Building No. Function/Building Name Yr. Built Yr. Reno Floors GSF 156 Building 100 Summer House 1835 1 400 157 Building 100 Outer Building 1835 1 65 158 Building 103 Golf Cart Storage 1935 1 725 159 Equipment Storage 1871 1 2289 162 Engineering Storage 2004 1 2400 CC Connecting Corridor 1950 1 13880

TOTAL SF 855,452

2.3. Site Plan

A Site plan and data for the Lebanon VAMC provided by the station personnel to EKFox is included in Appendix A.

2.4. Medium Voltage Distribution System Overview

The electrical utility feeds for Lebanon VAMC campus are provided by Metropolitan Edison (Met-Ed). The main feeds to the site are at the 13.2kV utility entrance at the eastern side of the campus. A 13.2kV overhead utility line runs along the eastern side of the campus. Two (2) sets of feeders are run from this line, down separate utility poles, and continue underground into the Main Switchgear Building, Building 123. The feeder sets terminate into two (2) separate breakers on the main switchgear. The primary source breaker is normally closed and the alternative source breaker is normally open. The switchgear does not contain a tie breaker.

The site has three (3) additional utility feeds that provide power to a single building or load from a pole mounted transformer that is upstream of the meter point. These additional utility feeds to the Lebanon VAMC include feeds to the Old Golf House (Building 103), Building 105, and the front entrance sign. Appendix A has a drawing showing the location of the utility feeds and the service entrances.

The main switchgear has three (3) breakers that feed power out to the service transformers for the buildings. The breakers are designated Boiler House, North Loop, and South Loop.

There is a normally open interconnect between the North Loop and South Loop at the pad-mounted medium voltage switch MVSW18. The table below summarizes the loads that are powered from each of these breakers.

Boiler House North Loop South Loop

Service Transformers B10 (Boiler House) B6, B7, B18, B19, B22, B23, B24, B99-

480V, B106, TS

(Thermal Storage)

B1, B1-480V, B2-208V, B2- 480V, B3, B4, B17, B17-480V, B17-CANTEEN, B27, B35, B37, B104, B136, MRI-N

Sum Xfmr Capacity 2000 kVA

5750 kVA

11,275 kVA

A summary of the main utility power usage based on usage data from utility bills is provided below and shows the information for the months with the highest and lowest consumption for the past 12 months. No consumption data for the smaller utility fees was obtained from the VAMC or the utility. Additional details can be found in Appendices A, B, and C.

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Appendix C has additional usage information for several other months.

Month Usage (kWh) On Peak Demand (kW) On Peak kVAR Main Service - High Sept 2017 2,653,513 3531 1368 Main Service - Low Jan 2017 1,654,679 3039 1232

2.5. Emergency Power System Overview

The Lebanon VAMC campus has fifteen (15) generators that are used to provide emergency power. Three (3) of these are portable units that can be used to provide temporary power at various locations on the campus in the event of a generator outage or maintenance activity.

The specifications for the generators are shown below. All the backup generators are connected to the power distribution system using an open transition (break before make) on the phase lines.

Name Make Model Voltage Connection Amps kW kVA P.F.

GENERATOR 1 ONSITE

ENERGY

MTU 16V2000

DS1000 120/208 Wye 3469 1000 1250 0.8

GENERATOR 2 ONSITE

ENERGY

DS00250D6SPA

H1574 120/208 Wye 867 250 312 0.8

GENERATOR 10 CUMMINS 200DFAA 120/208 Wye 694 200 250 0.8

GENERATOR 17 ONSITE

ENERGY

MTU 8V1600

DS400 120/208 Wye 1387 400 500 0.8

GENERATOR 18 ONSITE

ENERGY

MTU 8V1600

DS400 120/208 Wye 1387 400 500 0.8

GENERATOR 19 ONSITE

ENERGY

MTU 8V1600

DS400 120/208 Wye 1387 400 500 0.8

GENERATOR 35 CUMMINS GGLA-9307827 120/208 Wye 433.7 125 156.2 0.8

GENERATOR 102 ONSITE

ENERGY 650PXC6DT2 120/208 Wye 2134 615 769 0.8

GENERATOR 104 CAT C27 277/480 Wye 1203 800 1000 0.8

MRI E-POWER

GEN-1

ONSITE

ENERGY

MTU 12V0183

GS400 346/600 Wye 481 400 500 0.8

MRI E-POWER

GEN-2

ONSITE

ENERGY

MTU 12V0183

GS400 346/600 Wye 481 400 500 0.8

MRI E-POWER

GEN-3

ONSITE

ENERGY

MTU 12V0183

GS400 346/600 Wye 481 400 500 0.8

PORTABLE

117.5KVA TRITON 220 Wye 308.4 94 117.5 0.8

PORTABLE

350KVA

ATLAS

COPCO QAS 330 230 Wye 753 280 350 0.8

PORTABLE

625KVA TRITON 208 Wye 820.1 500 625 0.8

Generator loading information was obtained from the site for the monthly tests for generators 1, 2, 10, 17, 18, 19, 35, 102, and 104. This data is included in Appendix C. Based on this data, none of the generators exceeded 30% load during the test.

Generator 1 provides power to switchboard EDP inside Building 1. EDP provides power to five (5) equipment branch ATS’s, one (1) critical branch ATS, and two (2) life safety branch ATS’s. All of the ATS’s are 3-pole. Only ATS-EQ-1, ATS-EQ-2, ATS-CR-1, and ATS-LS-1

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425 I Street, NW, (CFM3A) 4500 Southgate Place, Suite 800 Washington, DC 20001 Chantilly, VA 20151 have bypass isolation. Except for ATS-EQ-2 and ATS-LS-2, which feed the elevators and fire pump respectively, the ATS’s then feed out to panels located in Building 1.

Generator 2 is located in Building 134 and provides 208V power to switchboard 2EMD, which is also located in Building 134. Power from 2EMD feeds the fire pump ATS and three

(3) other ATS’s in Building 2. Two (2) of these ATS’s are for the equipment branch loads and one (1) is for the life safety branch. Except for the fire pump ATS, the ATS’s are all 4-pole with bypass isolation and feed out to panels located in the building.

Generator 10 provides 208V, 3P power to an ATS located in Building 10 (Boiler Plant). This ATS is 3-pole without bypass isolation and it provides power to a main distribution panel (Panel M) in Building 10. Panel M feeds power out to panels and loads located in Building 10 and also feeds and emergency panel located in Building 6.

Generator 17 is located in Building 134 and provides 208V, 3P power to switchboard 17EMD, which is also located in Building 134. Power from 17EMD feeds six (6) ATS’s in Building 17 and one (1) ATS in Building 136. In Building 17, there are four (4) ATS’s for the equipment branch and two (2) ATS’s for the life safety branch. ATS-ELEV, which provides power to the elevators, is a 3-pole ATS with bypass isolation. All the other ATS’s in Building 17 are 3-pole and do not have bypass isolation. The ATS in Building 136 is also 3-pole and does not have bypass isolation.

Generator 18 is located in Building 132 and provides 208V, 3P power to switchboard 18EMD, which is also located in Building 132. Switchboard 18EMD feeds power to three

(3) equipment branch ATS’s and two (2) life safety branch ATS’s that are all located in Building 18. All of the ATS’s are 3-pole without bypass isolation except for ATS-EQ4 which is 3-pole with bypass isolation and serves the elevators. ATS-EQ2 provides power to the fire pump. The other ATS’s provide power to panels located within Building 18.

Generator 19 is located in Building 133 provides 208V, 3P power to switchboard 19EDP, which is also located in Building 133. Switchboard 19EDP provides power to six (6) ATS’s located in Building 19, panel EMD (which feeds other ATS’s) in Building 22, and a step-up transformer located at the Thermal Storage plant. The ATS’s in Building 19 include four (4) in the equipment branch and two (2) in the life safety branch. All of the ATS’s in Building 19 are 3-pole without bypass isolation. Three (3) of the equipment branch ATS’s provide power the two (2) elevators and the fire pump. The other equipment branch ATS (EQ-1) and the life safety branch ATS’s provide power to panels located in Building 19.

Panel EMD in Building 22 feeds power to two (2) equipment branch ATS’s and one (1) life safety branch ATS located in Building 22. One (1) equipment branch ATS is for the elevator.

The other ATS’s feed panels located in Building 22. All of the ATS’s in Building 22 are 3-pole without bypass isolation.

Generator 35 provides 208V, 3P power to two (2) ATS’s (both 3-pole with bypass isolation) located in the Generator 35 Building. The load side of these ATS’s is connected to two (2)

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Generator 102 provides 208V, 3P power to switchboard EDP-B102, which is located in Building 1. This switchboard feeds power to three (3) ATS’s (one for equipment branch, one for critical branch, and one for life branch) that are also located in Building 1. All of these ATS’s are 3-pole with bypass isolation. The load side of the ATS’s feeds out to panels located in Building 1 and Building 102.

Generator 104 provides 480V, 3P power to four (4) ATS’s located in Building 104. Two (2) of the ATS’s serve the equipment branch. The critical and life safety branches are each fed from one (1) of the other ATS’s. All of these ATS’s have bypass isolation, but only EQ-2 is 4-pole. The others are 3-pole ATS’s. The output from each of these ATS’s feeds a 480V panel.

The MRI E-Power Generators provide 600VAC, 3P power to two transformers. The first is transformer T-AX is a stepdown transformer that provides 208V emergency power to ATS- GENFARM-AX, which is a 3-pole ATS, with bypass isolation, that feeds power to the generator plant control building. The second transformer is T-GENFARM, which is a 600V/13,200V step-up transformer that feeds power across campus to transformer T-MRI- E that steps the voltage downs to 480V. Power from T-MRI-E feeds into the new MRI E-power building main distribution panel, which then feeds into seven (7) adjacent ATS’s.

These ATS’s are all 3-pole ATS’s that then feed panels located in the MRI area in Building 1.

According to the VAMC, during a power outage, all the MRI E-Power Generators all start, synchronize, and connect to the bus to provide power. The generators will then disconnect from the bus if the connected load does not require all the generators to be running.

2.6. Calculation Methods

As mentioned, this study includes the following elements: short circuit calculations, overcurrent protective device coordination, voltage drop analysis, arc flash hazard analysis, and a condition assessment of electrical equipment.

As required by the project’s Statement of Work, all calculations have been performed using software developed by SKM Systems Analysis, Inc. The software is named Power*Tools, Version 7.0.4.6 and it is a modular assembly of programs. The following modules have been used for this study:

System Model Development DAPPER Short Circuit Calculations A_Fault Protective Device Coordination CAPTOR Voltage Drop Analysis DAPPER Arc Flash Hazard Analysis Arc Flash Evaluation Condition Assessment Equipment Evaluation

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Version 7.0.4.6 of the Power*Tools software has been used for all of the calculations presented throughout this report. Additional information related to this software package can be found at www.skm.com.

2.7. Ground Resistance Test Reports

As stated in the project Statement of Work and as described in VHA Directive 1028, the facility’s grounding system must be tested and a Facility Ground Resistance Test Report must be produced every 36 months.

The VHA Directive 1028 Compliance Survey for the Lebanon VAMC was available at the time of the surveys. However, the grounding system test reports were not available at the time of this submission. The EKFox survey team took several ground resistance measurements (using an AEMC 3711 ground clamp meter) in the course of the survey to get a general idea of the state of the facility ground connections. The team also performed a visual inspection for each of these ground connections. A summary of the measurements is included below. The ground test report and photos of several of the ground connections are included in Appendix I.

Location Resistance (Ohms) T1-480V 0.1 T1-208V 0.2 T10 6.8 T23 13 T-106 19 MRI-E Power Gen 1 0.14 MRI-E Power Gen 2 0.11 MRI-E Power Gen 3 0.25 Building Ground Bar 0.36 Building 10 Generator 0.03

2.8. Study Assumptions

The survey team has examined most of electrical distribution equipment in the Lebanon VAMC system and there were circumstances where certain data was not uncovered. This occurred for several reasons: the impracticality of taking a particular panel or device out of service in order to determine a particular rating or part number; the lack of identifiable information on a device due to age, deterioration, or manufacturing method; and the lack of complete as-built drawing data. The following describes data that has been assumed for the purposes of this study:

2.8.1. Substation Circuit Breakers and Fuses

In some cases, it might not possible to verify the trip level for a substation circuit breaker or fuse type due to the fact that an outage would have been required to verify the actual trip or fuse. In these cases, the last known trip setting or fuse type/size was used in the analyses.

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2.8.2. Distribution Transformers

Transformer impedance is based on actual nameplate data. X/R ratio is estimated based on typical values for transformers of this type and size. The analyses also use assumed characteristic curves for the primary fuses based on prior as-built documentation since the actual fuses could not be surveyed.

2.8.3. Low Voltage Protective Devices

There are a small number of protective devices in the system which have not been identified other than manufacturer and amperage rating. With this lack of data, it is impossible to determine the breaker’s time current characteristic. However, this information will typically not adversely affect the results. In the course of evaluating the system, information for similar items may be used to fill in for characteristics of specific items that were unknown. In terms of incident energy, typically the system will rely on upstream devices for which the time current characteristics are known (i.e., the most conservative approach).

2.8.4. Motors/Loads

Motors and other loads will be assumed for the sake of performing voltage drop calculations and motor contributions to short circuit current. When available, actual survey data will be used for these items.

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3. FAULT CURRENT ANALYSIS

3.1. Introduction

The fault current analysis is developed based on data collected during the survey of the Lebanon VAMC electrical distribution system. The analysis examines the short circuit currents that occur at selected locations in the electrical system and is used to determine the capability of the system to withstand any possible electrical fault without damage.

One-line diagrams of the system are included in Appendix H. Reports showing the complete input data used to construct each model are included in Section 3.4.

3.2. Sources of Fault Current

The short circuit fault current calculations performed for the Lebanon VAMC electrical system are based on the available fault current from the utility (Met-Ed) who provided the available fault current data attached in Appendix B.

In summary, the available fault current from the Met-Ed system is:

Main Service Primary Feed:

Circuit: 00770-2 Primary Feed Voltage Level: 13,200 V Max. Three-Phase Fault: 4598 A Max. Line-to-Ground Fault: 3746 A X1/R1 Ratio: 2.99 X0/R0 Ratio: 2.08

Main Service Backup Feed:

Circuit: 00782-2 Backup Feed Voltage Level: 13,200 V Max. Three-Phase Fault: 3997 A Max. Line-to-Ground Fault: 3108 A X1/R1 Ratio: 3.4 X0/R0 Ratio: 2.52

Old Golf House (Building 103) Feed:

Location: Bank Pole 37528-36025 Transformer: 13,200 V(L-L) 1P Wye to 120/240V, 10kVA Transformer Impedance: 1.54% Max. Line-to-Ground Fault: 2098 A X1/R1 Ratio: 2.54 X0/R0 Ratio: 2.54

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Main Entrance Feed:

Location: Bank Pole 237423C35968 Transformer: 13,200 V(L-L) 1P Wye to 120/240V, 10kVA Transformer Impedance: 1.54% Max. Line-to-Ground Fault: 2909 A X1/R1 Ratio: 3.87 X0/R0 Ratio: 3.25

Building 105 Feed:

Location: Bank Pole 237423C35968 Transformer: 13,200 V(L-L) 1P Wye to 120/240V, 15kVA Transformer Impedance: 1.54% Max. Line-to-Ground Fault: 3712 A X1/R1 Ratio: 3.12 X0/R0 Ratio: 3.12

Additional sources of short circuit fault current are the induction motors which operate throughout the system. Typically these motor contributions are relatively small especially when a fault is located some distance from the motor, and when a motor is under 50HP.

3.3. Calculation Scenarios

The first DAPPER report included in this submission is based on normal interconnection of the electrical power system elements fed by the east utility service. Additional reports for this system were generated for two (2) other scenarios. These scenarios are summarized in the table below.

Scenario Utility Feeds Generators ATS’s Normal Interconnection Primary Feed Breaker – Active

Backup Feed Breaker – Out Smaller Utility Feeds – Active

Out Normal Pos.

Secondary Feed Primary Feed Breaker – Out Backup Feed Breaker – Active Smaller Utility Feeds – Active

Out Normal Pos.

On Generator Primary Feed – Out Backup Feed – Out

Smaller Utility Feeds – Out

Active Emergency Pos.

The main switchgear has no tie and runs almost exclusively on the primary feed. However, it was necessary to include the “Secondary Feed” scenario in this study since the lower fault current of the backup feed causes some buses to have higher arc flash incident energy.

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3.4. SKM Power*Tools Input Data Reports

The included DAPPER input reports list the system components used to calculate the short circuit currents for the three scenarios described above.

Scenario: Normal Utility

Scenario: Secondary Utility Source

Scenario: On Generator

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3.5. Short Circuit Calculation Results

The following DAPPER Fault Contribution Complete Reports show the fault current levels at various electrical panels (aka buses) in the system for the three (3) scenarios described above. This information is used by the software program to evaluate if the equipment is rated to withstand the fault current to which it is subjected. (See the following section 3.6.)

S c e n a ri o : N o rm a l U ti lit y e n a ri o : S e c o n d a ry U ti lit y S o u rc e e n a ri o : O n G e n e ra to r

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3.6. Equipment Evaluation Results

The following Equipment Evaluation reports list device component ratings against calculated values of short circuit currents. The current study shows that fifty-three (53) overcurrent protection devices (OCPD’s) have failed the device evaluation for interrupting capacity. Should a downstream fault occur, these OCPD’s may not be able to interrupt the fault and require replacement in order to provide a circuit breaker with the correct interrupt capacity.

Devices that are shown as “fail” are at or above 100% capacity. They are highlighted in the following reports and are also shown in table below.

Devices that are shown as “marginal” are at or above 90% capacity.

Devices that are shown as “unknown” were not evaluated as part of that particular scenario.

These devices are “unknown” not because they were not fully defined, but because they were not energized for a specific scenario and therefore not part of that particular evaluation.

Connected Bus Device Name Bus

Voltage Frame Voltage

Frame/ Trip

Calc Int kA

Device Int kA

Int % Rating

BUS-B1-6AEQ CB-B1-6AEQ-M 208 240 150 13.29 10 132.89

BUS-B1-DPEQ1A CB-B1-DPEQ1A-2 208 240 60 22.05 10 220.54

BUS-B1-DPEQ1A CB-B1-DPEQ1A-3 208 240 60 22.05 10 220.54

BUS-B1-DPEQ1A CB-B1-DPEQ1A-4 208 240 100 22.05 10 220.54

BUS-B1-DPEQ1A CB-B1-DPEQ1A-5 208 240 100 22.05 10 220.54

BUS-B1-DPEQ1A CB-B1-DPEQ1A-6 208 240 100 22.05 10 220.54

BUS-B1-DPEQ1A CB-B1-DPEQ1A-7 208 240 100 22.05 10 220.54

BUS-B1-DPEQ1A CB-B1-DPEQ1A-8 208 240 100 22.05 10 220.54

BUS-B1-DPEQ2 CB-B1-DPEQ2-1 208 240 225 / 200 11.21 10 112.07

BUS-B1-DPEQ2 CB-B1-DPEQ2-2 208 240 225 / 200 11.21 10 112.07

BUS-B1-DPEQ2 CB-B1-DPEQ2-3 208 240 225 / 200 11.21 10 112.07

BUS-B1-EQ4 CB-B1-1 208 240 225 28.24 25 112.98

BUS-B1-EQ5 CB-B1-EQ5-1 208 240 60 26.74 10 267.43

BUS-B1-GACR CB-B1-GACR-1 208 240 60 14.32 10 143.16

BUS-B1-GAEQ1 CB-B1-GAEQ1-1 208 240 70 / 60 11.08 10 110.78

BUS-B1-GBX3 CB-B1-GBX3-M 208 240 100 26.61 22 120.94

BUS-B1-GG CB-B1-GG-M 208 240 100 11.26 10 112.64

BUS-B1-MECHCR CB-B1-MECHCR-M 208 240 100 13.6 10 135.96

BUS-B1-MECHCR F-B1-XRAY-MDP-M 208 250 400 / 300 17.23 10 172.3

BUS-B1-Z1 CB-B1-Z1-1 208 240 60 14.92 10 149.17

BUS-B1-Z1 CB-B1-Z1-2 208 240 60 14.92 10 149.17

BUS-B1-Z1 CB-B1-Z1-3 208 240 60 14.92 10 149.17

BUS-B1-Z1 CB-B1-Z1-4 208 240 60 14.92 10 149.17

BUS-B1-Z1 CB-B1-Z1-5 208 240 60 14.92 10 149.17

BUS-B1-Z1 CB-B1-Z1-6 208 240 60 14.92 10 149.17

BUS-B2-EP1 CB-B2-EP1-1 208 240 50 23.02 10 230.25

BUS-B2-EP1 CB-B2-EP1-2 208 240 100 23.02 10 230.25

BUS-B2-HPB CB-B2-HPB-4 480 480 25 20.93 18 116.28

BUS-B2-HPB CB-B2-HPB-5 480 480 25 20.93 18 116.28

BUS-B10-MSB CB-B10-MSB-1 480 480 1,200 / 1,000 52.21 50 104.42

BUS-B10-MSB CB-B10-MSB-2 480 480 1,200 52.21 50 104.42

BUS-B17-PA CB-B17-PA-1 208 240 100 11.34 10 113.39

BUS-B17C-LP1 CB-B17C-LP1-M 208 240 100 22.15 22 100.69

BUS-B17C-PP1 CB-B17C-PP1-M 208 240 100 22.15 22 100.69

Prepared for: Dept. of Veterans Affairs Section 3 Page 6 Prepared by: E.K. Fox & Associates, Ltd.

Washington, DC 20001 Chantilly, VA 20151

Connected Bus Device Name Bus

Voltage Frame Voltage

Frame/ Trip

Calc Int kA

Device Int kA

Int % Rating

BUS-B18-P4 CB-B18-P4-ELEV10 208 240 200 11.11 10 111.06

BUS-B18-P4 CB-B18-P4-ELEV11 208 240 200 11.11 10 111.06

BUS-B18-P4 CB-B18-P4-ELEV9 208 240 200 11.11 10 111.06

BUS-B19-ELEV14-ECB CB-B19-ATSELEV 208 240 150 14.46 10 144.63

BUS-B19-E CB-B19-E-1 208 240 100 11.03 10 110.32

BUS-B19-E CB-B19-E-M 208 240 200 11.03 10 110.32

BUS-B22-MDP CB-B22-MDP-4 208 240 100 12.39 10 123.92

BUS-B22-MDP CB-B22-MDP-5 208 240 200 12.39 10 123.92

BUS-B22-MDP CB-B22-MDP-6 208 240 200 12.39 10 123.92

BUS-TS-IS-E SW-TS-IS 208 240 800 21.24 10 212.44

BUS-B23-A CB-B23-A-1 208 240 100 15.03 10 150.33

BUS-B23-B CB-B23-B-1 208 240 30 13.64 10 136.44

BUS-B23-C CB-B23-C-1 208 240 30 17.28 10 172.83

BUS-B23-C CB-B23-C-2 208 240 30 17.28 10 172.83

BUS-B23-C CB-B23-C-3 208 240 30 17.28 10 172.83

BUS-B23-WA(1) CB-B23-WA(1)-1 208 240 100 11.8 10 117.97

BUS-GENFARM-MDP CB-GENFARM-MDP-1 600 690 600 13.06 13 100.47

BUS-GENFARM-MDP CB-GENFARM-MDP-2 600 690 600 13.06 13 100.47

BUS-GENFARM-MDP CB-GENFARM-MDP-3 600 690 600 13.06 13 100.47

e n a ri o : N o rm a l U ti lit y e n a ri o : S e c o n d a ry U ti lit y S o u rc e