S06-657A-25-107-SPG22461-Poplar Bluff VA Arc Flash Study-Systems Studies-Rev 1.pdf

11960 Westline Industrial Dr., Suite 330 Maryland Heights, MO 63146

Office: 314-218-2710 Fax: 314-942-7055 www.eps-ed.com

SHORT CIRCUIT EVALUATION, PROTECTIVE

DEVICE COORDINATION, AND ARC FLASH STUDY

Poplar Bluff VA Arc Flash Study

Poplar Bluff, MO

EPS Job No. SPG22461

REV DATE DESCRIPTION ORIG APPROVALS

0 May 19, 2023 Issued for Approval GB BM BM 1 July 25, 2023 Issued as Final GB BM BM

Office: 314-218-2710

TABLE OF CONTENTS

EXECUTIVE SUMMARY

I. INTRODUCTION AND SCOPE

A. Introduction

B. Input Data and Estimations

II. SHORT CIRCUIT STUDY

A. Short Circuit Summary

B. General Discussion

C. Output Reports

III. PROTECTIVE DEVICE COORDINATION STUDY

A. Coordination Summary

B. General Discussion

IV. ARC FLASH STUDY

A. Arc Flash Summary

B. General Discussion

C. Arc Flash Mitigation

D. Arc Flash Study Notes

V. APPENDICES

A. One-Line Diagram ..................................................................................................................A

B. Short Circuit Evaluation .........................................................................................................B

C. Time Current Characteristic Curves ...................................................................................... C

D. Protective Device Settings ..................................................................................................... D

E. Short Circuit Study Input Report .............................................................................................E

F. Short Circuit Study Output Report ..........................................................................................F

G. Arc Flash Evaluation Results (Worst Case) ............................................................................ G

H. Arc Flash Definitions ............................................................................................................. H

I. Arc Flash Labels (Example) ..................................................................................................... I

J. References .............................................................................................................................. J

Office: 314-218-2710

EXECUTIVE SUMMARY

This study includes the Short Circuit Evaluation, Protective Device Coordination, and Arc Flash Study covering the electrical system of Poplar Bluff VA Arc Flash Study located at Poplar Bluff, MO. The study was performed using SKM Power*Tools for Windows version 10.0.0.2.

There are 2 devices which fail the short circuit evaluation. These devices are CB A/C UNIT 5 and CB AC UNIT 4 which is found at Appendix B. Arc flash labels are not provided for these locations due to safety concerns beyond the scope of arc flash incident energy analysis. For each panelboard containing a device which has failed this evaluation, further investigation is required to determine if other devices within these panelboards are also adequately rated for the fault current as calculated. Calculated short circuit fault current values at each equipment location (switchboard, panelboard, disconnect, etc.) are located in Appendix F.

The protective device settings are selected to protect all equipment while adhering to the 2020 National Electrical Code. There are four (4) locations where miscoordination exists, see section III – A. Time Current Coordination curves for the system may be found in Appendix C, existing and recommended device settings may be found in Appendix D.

Based on the existing settings, there are 10 locations (208 GEN MAIN, DISC-T1-SEC, DISC-T2-SEC, NDP LineSide, PANEL 3-SN1, SWBD 16B-GDP, SWBD 20-D B20, SWBD 20- D1 B20, SWGR 20-SB B20, and T11 SECONDARY) where the calculated incident energy exceeds 40 cal/cm2. No live work should be performed at these locations as no safe PPE exists for this incident energy. This equipment should be de-energized before work or maintenance is performed. EPS recommends remotely operating devices at these locations due to the possibility of an arc flash event with exposure to high incident energies. If this is not acceptable or feasible, EPS E&D can investigate other means to reduce the incident energy. The solution will be based on customer preference and operational requirements and is considered as additional work not in the original scope of the study.

The arc flash labels will be provided based on the existing settings.

Recommendations:

• Replaced the failed breakers (CB A/C UNIT 5 and CB AC UNIT 4) with rated higher than the available fault current, which can be found in Appendix B.

• This report did not have access to verify T11 and T12 primary disconnect switch or fuse type and rate. The report used the information found at previous one line drawing. Due to this, the report did not report as failed devices.

• Adjust ground settings of CB SUB C MAIN, CB MCC-2 MAIN, CB MCC-1 MAIN and CB FED ATS-5.

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July 2023 Revision 1

I. INTRODUCTION AND SCOPE

A. INTRODUCTION

The scope of work for this project requires performing a Short Circuit Evaluation, Protective Device Coordination, and Arc Flash Study for the electrical system of Poplar Bluff VA Arc Flash Study located at Poplar Bluff, MO. The short circuit analysis includes the utility contribution down to the 208V panels. The coordination and protective device analysis starts from the supply side and includes devices down to the 208V panels.

A short circuit and protective device coordination study is used to confirm proper equipment selection, to minimize the damage to equipment and devices, and to limit the power interruption to only the part of the system with the fault. This report will include the evaluation of equipment and device short circuit ratings and provide settings for the protective devices for coordination purposes. An arc flash incident energy analysis evaluates the electrical system’s highest and lowest available fault current and calculates the incident energy generated at each available point.

The studies are performed in accordance with:

• IEEE 141-1993, Recommended Practice for Electric Power Distribution of

Industrial Plants

• IEEE 241-1990, Recommended Practice for Electric Power Systems in Commercial

Buildings

• IEEE 242-2001, Recommended Practice for Protection and Coordination of

Industrial and Commercial Power Systems

• IEEE 399-1997, Recommended Practice for Industrial and Commercial Power

Systems Analysis

• IEEE 1015-2006, Recommended Practice for Applying Low-Voltage Circuit

Breakers Used in Industrial and Commercial Power Systems

• IEEE 1584-2018, Guide for Performing Arc Flash Hazard Calculations

• NFPA 70-2020, National Electrical Code

• NFPA 70E-2018, Standard for Electrical Safety in the Workplace

• OSHA 1910.269, Electric Power Generation, Transmission, and Distribution

• 29 CFR 1926 Subpart V App E, Protection from Flames and Electric Arcs

While EPS Engineering and Design (EPS E&D) strives to supply the most accurate and up-to-date analysis, any inaccuracies found can have a profound effect on the outcome of the study. This study is based on the system information included that is supplied to EPS E&D as being the latest and the actual; any variations can cause discrepancies and release EPS E&D from any liability of said system.

It should be understood the study is based on the utility’s existing facilities and system, which are subject to change when the utility upgrades and strengthens its system. This will release EPS E&D from any liability of the study of such electrical system.

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Electrical equipment shall be maintained in accordance with the manufacturers’ instructions or industry consensus standards such as ANSI/NETA Standard for Maintenance Testing Specifications. Failure to maintain the electrical equipment and protective devices invalidates this study and shall release EPS E&D from any liability of this study.

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B. INPUT DATA AND ESTIMATIONS

Available Fault Currents:

Preferred Source Maximum Fault Contribution:

Three- Phase: 4309AMPS with X/R at 4.29 at 13800V

Line-to-Ground: 3703AMPS with X/R at 3.82 at 13800V

Alternate Source Maximum Fault Contribution:

Three- Phase: 3352AMPS with X/R at 5.13 at 13800V

Line-to-Ground: 2802AMPS with X/R at 4.24 at 13800V

Equipment information such as circuit breakers, transformers, panels, motors, etc., was obtained by EPS E&D with the assistance of Stephen Sanders (sanders@sb-serv.com ).

The following scenarios were used for the study evaluation:

Scenario 1 – System on Maximum Utility Fault Contribution

Scenario 2 – System on 50% Utility Fault Contribution

Scenario 3 – Only Generators Running

The study uses the approach of using 75° C as being the conductors’ rated temperature for LV cables and equipment, regardless of whether the LV cable insulation is rated for a temperature higher than 75° C or not. This is based on NEC 110.14 (C) and NEC 310.15 (A) (2). The only exception is when the cable or the equipment is rated for a temperature lower than 75° C. This is usually the case for LV equipment rated at 100A or less, or cables with a 60° C insulation rating.

The pre-fault voltage at the power source connection point was assumed to be 1.0 per unit at 0°. This simplification means that the load current has a negligible effect on the faulted phase currents.

mailto:sanders@sb-serv.com

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II. SHORT CIRCUIT STUDY

A. SHORT CIRCUIT SUMMARY

The Short Circuit Calculation was performed using SKM software. The complete computer output reports can be found in Appendix F and the associated single line diagrams are included in the Appendix A. Equipment evaluation compares the equipment withstand and device interrupting ratings to the available fault current to verify adequate short circuit bracing and interrupting ratings.

There are 2 devices which fail the short circuit evaluation. These devices are CB A/C UNIT 5 and CB AC UNIT 4 which is found at Appendix B. Arc flash labels are not provided for these locations due to safety concerns beyond the scope of arc flash incident energy analysis. For each panelboard containing a device which has failed this evaluation, further investigation is required to determine if other devices within these panelboards are also adequately rated for the fault current as calculated. Calculated short circuit fault current values at each equipment location (switchboard, panelboard, disconnect, etc.) are located in Appendix F.

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B. GENERAL DISCUSSION

This study examines the prospective short circuit fault levels at all locations within the electrical power system. This is necessary to evaluate the adequacy of circuit-interrupting devices (fuses, breakers) to safely interrupt and isolate the fault, and also of non-interrupting equipment (busses, switches) to safely withstand the resulting thermal and mechanical stresses. The fault magnitudes are also used for determining settings and selective time coordination of the protective devices. The maximum possible values are required in order to evaluate the equipment ratings and in some particular cases the minimum values may also be needed to check the sensitivity requirements of certain protective devices.

Since fault currents vary with time, decaying as a function of the X/R ratio, ANSI defines three different impedance networks to calculate the fault duties usually considered when evaluating equipment and devices: first cycle, interrupting, and steady state. The three networks are basically the same except for the impedances used for rotating machines.

First cycle network: For calculation of short circuit duties to be compared with the interrupting ratings of all fuses and LV CB, unmodified or modified subtransient impedances are used to represent all rotating machines in the equivalent network. Subtransient impedances are modified for all rotating machine sources of short circuit current.

Interrupting network: This circuit is used for calculating short circuit interrupting duties at circuit breaker minimum contact parting times of 1.5 to 4 cycles after the short circuit starts.

The approximately 30 cycle network: It is often a minimum source representation intended to investigate whether minimum short circuit currents are sufficient to operate current actuated relays. In this network, generators are represented with transient reactance or a larger reactance related to the magnitude of decaying generator short circuit current at the desired calculation time.

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C. OUTPUT REPORTS

The short circuit study was performed using the A Fault module within SKM Systems Power*Tools for Windows® software. The program generates two reports of the short circuit analysis: an input data report and an output report.

The input data report is based on the composite one-line diagram developed by EPS E&D.

The objective of the one-line diagram is to illustrate pictorially the interconnections of all fault contribution sources; typically from the utility, motors, and local generators. The program takes all raw data and calculates per unit resistance and reactance on the MVA base chosen for the study (typically 100 MVA) at each operating voltage. The input report used by the short circuit program shows, in full detail, all system elements the short circuit analysis was based on, including: per unit impedances (per unit R and per unit X) in the order of cable data (feeder input data), transformer input data, generation contribution data (starting with the local generators and followed by the utility source), and the motor load contribution data. The report then shows the bus numbers the program assigned to the interconnecting elements (which is shown on the one-line as nodes with assigned numbers or buses with selected names). The bus or node data is used in constructing the mathematical model used in the short circuit calculations.

The short circuit analysis report provides a separate section for each type of fault analysis selected. There are two types of report options available: three-phase only or three-phase and unbalanced. Both specify the calculations performed for each voltage level. The three-phase and unbalanced report options were selected for this study.

Note: When the three-phase and unbalanced fault report is selected for low voltage systems, both the three-phase momentary duty report and the interrupting fault current report will be empty. The study interpretation results for the momentary and interrupting fault results (balanced and unbalanced) is only applicable for systems with voltages larger than 600 V. The three-phase fault report section (balanced and unbalanced) is applicable for the low voltage systems of 600V and less.

The three-phase fault report provides the first half cycle fault duties in RMS symmetrical amperes, and the corresponding short circuit MVA at each fault location selected in the program, along with the phase angle between the fault current and the per unit voltage at the fault location.

The phase angle is the Thevenin equivalent impedance phase angle. In addition, the Thevenin equivalent impedance and the X/R ratio at the fault location are reported. When more than one source of the fault current exists, the multiple source contribution fault currents and phase angles are included.

For application of the low voltage duties, the program calculates the fault duties in kilo amperes (kA) based on the device test power factor and low voltage multiplying factor from the ANSI C37.13-1990 standard and IEEE C37.13-2015 standard.

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The unbalanced fault report provides the symmetrical RMS current values for four (4) different fault types: three-phase (3P), single line-to-ground (SLG), line-to-line (LL), and line-to-line-to-ground (LLG). The same three-phase fault value mentioned above is shown together with the asymmetrical maximum and average RMS values given at the one-half cycle instant after the fault inception, for the calculated X/R ratio. The maximum value is different for each phase since it depends on what time in the voltage waveform the fault occurs. The maximum value is shown for only one phase and the average value is shown next to the maximum value. The positive-, negative-, and zero-sequence equivalent impedances used for calculating the types of faults above are shown with the associated X/R ratios only for these equivalent impedances. It also provides the maximum asymmetrical value at the one-half cycle point for the SLG fault only. No average value exists for a SLG fault since there is no current assumed to be flowing in the other two phases.

Note: This part of the report is always used for evaluating equipment rated at 600 V and below.

The three-phase momentary duty report shows, in a manner similar to the three-phase fault report, the three-phase symmetrical RMS current that flows through the medium and high voltage system (larger than 600V) at one-half cycle after the fault occurs together with X/R. The report also shows the phase angle between the fault current and the source per unit voltage (Thevenin equivalent impedance phase angle), and the corresponding calculated short circuit MVA. The multiple source contribution fault current with the phase angle (if more than one source exists) is also reported.

The momentary fault current is defined as the short circuit peak (equivalent RMS) current that flows at the first half cycle after the onset of the fault. The value of the momentary available fault current is found by first calculating the initial symmetrical RMS current using the magnitude of the available fault current from the machine (motor or generator) reactance values based on ANSI multiplying factors. Then, a 1.6 symmetrical multiplier is applied to match the ANSI simplified momentary RMS calculations. The momentary RMS current (asymmetrical value) is then determined based on the calculated fault circuit X/R value. Additionally, the peak (crest) values are found by applying a 2.7 multiplier and shown based on the calculated fault circuit X/R.

The unbalanced momentary duty report is similar to above with the four different unbalanced fault types. For each type of fault, the duty is shown as symmetrical RMS current; the same three-phase fault value as shown earlier. For the single line-to-ground fault value, two values are shown: one with the calculated X/R, and one with the 1.6 multiplier. At one-half cycle, the asymmetrical value is obtained by applying a 1.6 multiplier to the symmetrical value and the asymmetrical value is given using the actual calculated fault circuit X/R value (only for the 3P and SLG fault cases). The positive-, negative-, and zero-sequence equivalent impedances are also shown.

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The interrupting fault current is defined as the short circuit current which flows through a protective device at the time of contact separation. The 3P interrupting duty report provides the fault currents in RMS symmetrical amperes, calculated using the ANSI multipliers for motor loads.

The calculated values for the RMS symmetrical and asymmetrical fault duties are shown at two, three, five, and eight cycles symmetrical, along with the total value, which includes the effects of the AC and DC decrements. In addition, the Thevenin equivalent impedance and X/R ratio at the fault location, and the fault duty contributions from each separate source are reported.

The unbalanced interrupting duty report provides the symmetrical RMS current interrupting value for 3P, SLG, LL, and LLG faults. All fault values are shown at two, three, five, and eight cycles symmetrical along with the total value. The positive-, negative-, and zero-sequence equivalent impedances are also shown with their associated X/R ratios.

Equipment evaluation uses the following details from the short circuit reports to evaluate different protective devices.

For low voltage breakers and fuses, equipment evaluation compares the 3P and SLG ANSI calculated duty after multiplying it by the low voltage factor. This low voltage factor depends on the X/R ratio. If the calculated X/R ratio is higher than the test X/R, low voltage factor is used.

The current obtained after multiplication is the asymmetrical current. The greater value of asymmetrical ANSI 3P LV and ANSI SLG LV is used for evaluation of low voltage breakers. All calculated duties and X/R ratios are taken from the A_FAULT unbalanced fault report.

For medium and high voltage circuit breakers which are rated on a total basis, equipment evaluation uses the greater value of 3P and SLG momentary current corresponding to breaker speed. This value is used to compare with momentary or asymmetrical rating of the device.

For HV fuses, equipment evaluation compares the interrupting rating with the momentary symmetrical current and the asymmetrical rating with the momentary asymmetrical current based on X/R.

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III. PROTECTIVE DEVICE COORDINATION STUDY

A. COORDINATION SUMMARY

The protective device settings are selected to protect all equipment while adhering to the 2020 National Electrical Code. There are four (4) locations where miscoordination exists (see comments below). Time Current Coordination curves for the system may be found in Appendix C, existing and recommended device settings may be found in Appendix D.

• TCC 34, TCC 35 and TCC 36 (Ground)

CB SUB C MAIN and CB FED ATS-5 (ground settings) do not coordinate properly. Due to the lack of coordination, the ability to minimalize the outage in the event of fault or overload is diminished.

CB SUB C MAIN and CB MCC-1 MAIN (ground settings) do not coordinate properly. Due to the lack of coordination, the ability to minimalize the outage in the event of fault or overload is diminished.

CB SUB C MAIN and CB MCC-2 MAIN (ground settings) do not coordinate properly. Due to the lack of coordination, the ability to minimalize the outage in the event of fault or overload is diminished.

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Proper coordination of protective devices is to selectively isolate a faulted circuit from the remainder of the electrical distribution system. Once the faulted portion of the system is isolated, the system operates normally without additional disturbance.

Safety should take precedence when designing any electrical system. Protective devices are coordinated in order to limit equipment damage and personal injury. Proper maintenance of electrical devices in accordance with manufacturer’s instructions or industry consensus standards such as ANSI/NETA Standard for Maintenance Testing Specifications is necessary in order to provide protection.

The Time Current Characteristic (TCC) curves show the expected performance of the protective devices within the electrical system when set at the identified settings. These TCC curves indicate the point in time each device will trip at various current levels. The curves are plotted to verify that the devices closer to the fault will sense the current and clear the fault prior to the tripping of larger devices further upstream.

The miscoordination between protective devices which are in series is not considered a serious problem. They cannot be coordinated unless there is sufficient impedance between these devices. This also applies to transformer primary and secondary protective devices. In both these cases, any of the devices can trip on a downstream fault and will cause the same degree of loss of power.

The protective device settings are selected to protect cables, transformers and motors while adhering to the 2020 National Electrical Code. A balance is achieved between protection and coordination.

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IV. ARC FLASH STUDY

A. ARC FLASH SUMMARY

Arc flash incident energy is calculated for the line and load side of the protective device with fault contributions from upstream and downstream sources. Appendix H lists the classes of protective clothing that should be worn while working on the equipment.

Based on the existing settings, there are 10 locations (208 GEN MAIN, DISC-T1-SEC, DISC-T2-SEC, NDP LineSide, PANEL 3-SN1, SWBD 16B-GDP, SWBD 20-D B20, SWBD 20- D1 B20, SWGR 20-SB B20, and T11 SECONDARY) where the calculated incident energy exceeds 40 cal/cm2. No live work should be performed at these locations as no safe PPE exists for this incident energy. This equipment should be de-energized before work or maintenance is performed. EPS recommends remotely operating devices at these locations due to the possibility of an arc flash event with exposure to high incident energies. If this is not acceptable or feasible, EPS E&D can investigate other means to reduce the incident energy. The solution will be based on customer preference and operational requirements and is considered as additional work not in the original scope of the study.

The arc flash labels will be provided based on the existing settings.

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The arc flash study is used to determine the appropriate protective clothing required to perform work at any given location. There are two standards currently available: IEEE 1584 and NFPA 70E. Much work has been performed by IEEE to develop a set of equations based on real world simulations of arcs. NFPA 70E assumes maximum bolted fault current and device tripping times and suggests proper PPE based on these assumptions. For this reason, IEEE 1584 will be used in determining incident energies based on the actual fault currents, device tripping times, and electrode configuration. The clothing requirement is determined using NFPA 70E clothing requirements which are accepted by OSHA. NFPA 70E does supply tables to determine safe clothing levels; however, these tables should only be used when an arc flash study is not available.

Fault levels calculated in the short circuit study are used for the arc flash study. In all cases, it is noteworthy that the working distance is the distance between the potential arc source and the face and chest of the worker performing the task. The calculations are made assuming the qualified person is exposed to energized electrical conductors or components.

Wearing the required safety protective clothing should never undermine observing the safety work practices associated with electricity.

The NFPA 70E requirements state that the electrical system should have been properly installed and properly maintained as per the NEC, manufacturers’ recommendations, or NETA guidelines. If the system has not been properly maintained or has improperly installed equipment, this study and the guidelines provided by the NFPA 70E, as well as the proposed arc flash PPE, may not adequately protect electrical workers.

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C. ARC FLASH MITIGATION

The arc flash incident energy can be lowered at a location using a number of methods, techniques, new technology, and procedural changes. These mitigation strategies focus on reducing the arc flash incident energy by changing one of two major factors: distance from the arc and duration of the arc. By increasing the distance to the arc location, the danger to personnel can be greatly reduced. By reducing the time of the arc, the total incident energy can be reduced.

Reducing the time of an arc flash incident can be accomplished through a number of methods. The most direct method is to reduce the operating time of the system protective devices such as breakers, fuses, and relays. EPS E&D routinely checks for changes in breaker and relay overcurrent settings as part of the arc flash analysis. Where such changes are possible, they may be found in other sections of this report. Other methods may involve replacing the protective elements or adding additional elements for arc flash detection. Temporary settings during operation or maintenance may be used. Faster arc detection technologies have been developed that detect the light emitted during an arc flash incident. Differential relays or zone selective interlocking may be used to isolate the affected equipment quicker than coordinated systems.

Increasing personnel distance away from an arc flash incident helps to prevent injury. This may be accomplished through remote operation of equipment. Many aftermarket products are available to accomplish this. Remote operation equipment may also be permanently installed into a system.

Other arc flash mitigation techniques may involve changes to operational procedures and/or equipment replacement. EPS E&D can evaluate the system to find the method(s) most appropriate for the system in question.

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D. ARC FLASH STUDY NOTES

This study is not meant to supersede or override any working safety measures, any safety procedures, or any safety issues related to the operation of the electrical equipment, its maintenance and repair. The Arc Flash Evaluation Results report summarizes the arc flash calculations at the equipment.

This study does not override the manufacturer’s recommendations on the proper use of their equipment and does not advise differently from the manufacturers’ or the industry standards on such issues since no study can take precedence over these standards.

This study assumes that all protective devices are in proper working order, have been installed correctly and have been maintained according to manufacturer’s recommendations or accepted industry standards such as ANSI/NETA Standard for Maintenance Testing Specifications.

The study is a requirement by OSHA for the safety of the electrical workers in industrial plants and commercial buildings. The study was performed to determine the incident energy available at the designated switching devices and to evaluate the burn risks and type of clothing that authorized personnel can wear when working near energized electrical equipment (whenever permissible).

Induction motors contribute continuous sub-transient current until removed at user specified time, unless they are specifically excluded from the arc flash study. In this study, included motors are considered contributing to the fault current for 5 cycles only.

The typical working distance used in the study is eighteen (18) inches for all MCC’s and panels. Twenty-four (24) inches is used for low voltage switchgear. Thirty-six (36) inches is used for medium voltage switchgear (1kV to 15kV). In all cases, the typical working distance measures the distance between the potential arc source and the face and chest of the worker performing the task. The worker is assumed to be stationary during the entire arc flash incident (constant working distance).

Sustainable arcs are possible but less likely in three-phase systems operating at 240 V nominal or less with an available short-circuit bolted fault current less than 2000 A. For locations meeting these criteria, an arc flash label will be provided with an incident energy less than 1.2 cal/cm2.

As provided in IEEE 1584-2018 Section 6.5 Table 8, typical gap and enclosure sizes are used for incident energy calculations in this study. Furthermore, the electrode configuration is considered VCB (vertical electrodes in enclosure) for all equipment evaluated, unless stated otherwise in section I – B.

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The arc flash calculation searches the entire system topology, starting from the faulted bus out, to find the first protective device with an over-current trip curve. Only ‘phase’ protection devices are considered for arc flash clearing time; ground-fault and other protection methods are not considered. Additional upstream protective devices are also included to check for miscoordination and a faster clearing time. If there are multiple contributions to the faulted bus, the search process will be repeated until each contribution is cleared by its protective device, or the search reaches the end of the topology.

Two conditions must be satisfied for the upstream protective device to be reported instead of the immediate protective device:

Condition 1: The immediate protective device must carry 5% or more of the cleared fault threshold (80% of the total bus fault current).

Condition 2: The upstream protective device must trip faster and carry a fault current that is greater than or equal to the cleared fault threshold”.

When the two conditions above are met, all devices within the branch containing the immediate protective device will be evaluated. If the first valid protective device is found in an upstream branch and the trip time is slower than the immediate device, the search stops there, and the immediate device will be reported.

Note: The cleared fault threshold value (80% of the total bus fault current) will determine the portion of the total arcing fault current at the bus that needs to be interrupted by protective devices to extinguish the arc. Therefore, the remaining portion of arcing fault current, if any, cannot sustain the arc and will not be considered in the accumulated incident energy.

Note: A maximum protection trip time equal to two seconds is considered a reasonable time for a person to remain in the location of the arc flash as suggested in the IEEE 1584. A time selection of more than two seconds may be required for a person to move away from equipment the person has entered, or for equipment that is not easily accessible. In this case, the time selected should be at least equal to the time required for the protective device to operate at that arc fault current level and to de-energize the circuit.

The trip time is determined for all protective devices located in the branch that contains the first trip device. The device with the fastest trip time for the given arcing fault current is used. If the trip time obtained from the time current curve is larger than the maximum protection trip time defined in the study, the maximum protection trip time is used.

When applying generic current-limiting fuse representation, the current-limiting range is assumed to start where the fuse clearing curve drops below 0.01 sec. It is also understood that fuses operating in the current limiting range are clearing the fault within ½-cycle for currents one to two times the current where the current-limiting range begins, and ¼-cycle for currents higher than two times the current where the current-limiting range begins. Generally, this is the basis under which current limiting fuses operate, and, in this study, all current limiting fuses used are as specified in the program library.

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V. APPENDICES

A: One-Line Diagrams

B: Short Circuit Evaluation

C: Time Current Characteristic Curves

D: Protective Device Settings

E: Short Circuit Study Input Report

F: Short Circuit Study Output Report

G: Arc Flash Evaluation Results (Worst Case)

H: Arc Flash Definitions

I: Arc Flash Labels (Example)

J: References

APPENDIX

A. One-Line Diagram

S-8

OUT OF SERIVCE

EP007.DRW

EP004.DRW

S-9 S-8 S-7S-6S-5 C-10

TO SUB-C

TO SWBD 20-E

TO CHILLER

EP002.DRW

EP003.DRW

EP005.DRW

EP006.DRW

MV SWGR B18

13800V, 1200A

FU FEEDER S-5

1200A

PD-T9

LTPU 5 (100A)

CT 100 / 5 A

GF 5 (100A)

CBL-0006

2/0 AWG - 560 ft 1 per phase

FU FED T-9

150A/150A

S

P

T1 500/500 kVA 13800 / 208 V

5.00 %Z

FU FEEDER S-6

1200A

PD-T8

LTPU 8 (80A)

CT 50 / 5 A

GF 6 (60A)

CBL-0007

2/0 AWG - 360 ft 1 per phase

FU FED T-8

40A/40A

S

P

T2 500/500 kVA 13800 / 208 V

4.90 %Z

FU FEEDER S-7

1200A

PD-T1,3,5,7

LTPU 4 (80A)

CT 100 / 5 A

GF 3 (60A)

CBL-0008

2/0 AWG - 40 ft 1 per phase

FU FED T-7

40A/40A

S

P

T3 225/225 kVA 13800 / 208 V

5.10 %Z

FU FEEDER S-8

1200A

PD-T4

LTPU 2 (40A)

CT 100 / 5 A

GF 1.5 (30A)

CBL-0009

2/0 AWG - 720 ft 1 per phase

FU FED T-4

40A/40A

S

P

T4 500/500 kVA 13800 / 208 V

4.90 %Z

FU FEEDER S-9

1200A

PD-T2

LTPU 8 (80A)

CT 50 / 5 A

GF 6 (60A)

CBL-0010

2/0 AWG - 360 ft 1 per phase

FU FED T-2

40A/40A

S

P

T5 225/225 kVA 13800 / 208 V

5.30 %Z

FU FED PWR HOUSE

150A/150A

S

P

TR PWR HOUSE

25/25 kVA 13800 / 240 V

3.69 %Z

CBL-0011

6 AWG - 45 ft 1 per phase

CB FED POWER HOUSE

70A/70A/70A

POWER HOUSE

240V, 225A

CBL-0012

500 kcmil - 50 ft 4 per phase

DISC-T1- SEC

208V

CB SWBD 20 SB MAIN

1600A/1600A/1600A

LTPU 1 (1600A)

GF 500A (500A)

SWGR 20-SB B 20

208V

CBL-0013

500 kcmil - 40 ft 4 per phase

DISC-T2-SEC

208V

CB SWBD 20 -SB MAIN

1600A/1600A/1600A

LTPU 1 (1600A)

GF 500A (500A)

SWGR 20-SB B-20

208V

G F

-T

IE

A

/1 A

/1 A

LT

P

U

A

G

F

A

A

CBL-0015

500 kcmil - 7 ft 4 per phase

CBL-0016

500 kcmil - 55 ft 4 per phase

CBL-0017

500 kcmil - 45 ft 4 per phase

MH #1

13800V

CBL-0018

2/0 AWG - 25 ft 1 per phase

CBL-0019

2/0 AWG - 25 ft 1 per phase

S

P

T9

2500/2500 kVA 13800 / 480 V

6.10 %Z

DISC-T9 PRIM

13800V

CBL-0020

600 kcmil - 95 ft 8 per phase

DISC-T9 SEC

480V

Open

PD-0032

S

P

T10

225/225 kVA 13800 / 480 V

4.70 %Z

PD-0033

CBL-0022

250 kcmil - 1 ft 1 per phase

S

P

T8 500/500 kVA 13800 / 208 V

5.50 %Z

DISC T8 PRIM

13800V

CBL-0023

500 kcmil - 55 ft 4 per phase

DISC-T8- SEC

208V

CB FED SWGR 2O E

1600A/1600A/1600A

LTPU 1 (1600A)

GF 500A (500A)

CBL-0024

500 kcmil - 45 ft 4 per phase

SWGR 20-SB-1

208V, 1600A

CBL-0025

2/0 AWG - 600 ft 1 per phase

S

P

T7

500/500 kVA 13800 / 480 V

4.90 %Z

DISC T7-PRIM

13800V

CBL-0026

500 kcmil - 125 ft 1 per phase

DISC T7- SEC

480V

FU FED T-5

20A/20A

CBL-0027

2/0 AWG - 680 ft 1 per phase

DISC T5 PRIM

13800V

CBL-0028

4/0 AWG - 45 ft 1 per phase

DISC T5-SEC

208V

FU FED T-3

20A/20A

CBL-0029

2/0 AWG - 400 ft 1 per phase

DISC T3 PRIM

13800V

CBL-0030

350 kcmil - 40 ft 2 per phase

DISC-T3- SEC

208V

CABLE LIMTERS

208V

CBL-0031

2/0 AWG - 300 ft 1 per phase

FU FED T-1

40A/40A

DISC T1 PRIM

13800V

DISC T2 PRIM

13800V

S

P

T6 500/500 kVA 13800 / 480 V

4.90 %Z

DISC T4 PRIM

13800V

CBL-0034

3/0 AWG - 50 ft 1 per phase

DISC-T4-SEC

208V

BUS FED FROM T4

208V

FU FED T-6

40A/40A

DISC-T-6 PRIMARY

13800V

CBL-0035

500 kcmil - 45 ft 1 per phase

DISC-T-6 SEC

480V

CBL-0121

350 kcmil - 45 ft 1 per phase

CBL-0122

350 kcmil - 75 ft 2 per phase

CBL-0123

500 kcmil - 65 ft 1 per phase

CBL-0147

3/0 AWG - 46 ft 1 per phase

CBL-0148

3/0 AWG - 42 ft 1 per phase

CBL-0149

3/0 AWG - 45 ft 1 per phase

CBL-0150

3/0 AWG - 46 ft 1 per phase

PANEL 23LP BLDG.23 (NEW)

208V

CB FED 23LP

225A/225A/225A

CHILLER #1

480V

CHILLER #2

480V

CBL-0298

500 kcmil - 55 ft 2 per phase

CB AXILU FED

800A/800A/800A

LTPU 1 (800A)

CBL-0299

500 kcmil - 60 ft 2 per phase

CB SWGR 2 SB AXIL

800A/800A/800A

LTPU 1 (800A)

E N

AUTO- SOURCE XFMR

CB-ALTERNATE

1200A

CBL-0325

2/0 AWG - 45 ft 1 per phase

FU-ALTER UTILITY

100A/100A

CB PREFERED

1200A

CBL-0327

2/0 AWG - 40 ft 1 per phase

15KV PAD-MOUNT MV SW (MTS-L)

13800V

EN

MTS

CBL-0328

2/0 AWG - 45 ft 1 per phase

MTS SW NORMAL

13800V

FU PREFERED UTIL

100A/100A

CBL-0329

2/0 AWG - 35 ft 1 per phase

MTS SW- EMERG

13800V

15KV CABLE TERM STATION

13800V

GEN #3

75 kVA 13800 V

CBL-0330

2/0 AWG - 25 ft 1 per phase

S

P

TR FED LOAD BANK

1000/1000 kVA 13800 / 480 V

5.44 %Z

FLTR-0001

1000 KVAR

FU T3-SN1

65A/65A

S

P

XFMR T-SN1

1000/1000 kVA 13800 / 480 V

5.44 %Z

PANEL 3-SN1

480V

CBL-0331

2/0 AWG - 10 ft 1 per phase

PD-MAIN 2

LTPU 4 (160A)

CT 200 / 5 A

GF 4 (160A)

PD-MAIN 1

LTPU 4 (160A)

CT 200 / 5 A

GF 4 (160A)

CBL-0333

2/0 AWG - 10 ft 1 per phase

T-3-SN1 PRIM

13800V

ALTERNATE SOURCE

3P 3352.0 Amps X/R 3P 5.1 Rated Voltage 13800 V

BUS-0381

13800V

PREFERRED SOURCE

3P 4309.0 Amps X/R 3P 4.3 Rated Voltage 13800 V

BUS-0382

13800V

CBL-0334

2/0 AWG - 35 ft 1 per phase

1200A SW TO LOAD BANK

13800V

FU FEEDER S-10

1200A

PD-T6

LTPU 8 (80A)

CT 50 / 5 A

GF 7 (70A)

CBL-0072

2/0 AWG - 600 ft 1 per phase

Poplar Bluff VA Arc Flash Study Poplar Bluff, MO

JOB NUMBER

SPG22461

REVISION: 1

DATE: 7/21/2023

DESCRIPTION:

SC, C, AF

EP001

AUXILLARY FEED

EP003.DRW

FIRE PUMP #2

EMERGENCY

EP003.DRW

EP001.DRW

TO ATS 1

TO ATS 4

TO ATS-3

TO 1-ATS-5

EP006.DRW

EP006.DRW

EP007.DRW

GO TO ATS-MRI

GO TO URGENT CARE

GO TO SWGR 20-SB

AUXILLARY FEED

CBL-0016

500 kcmil - 55 ft 4 per phase

SWBD 20-D1 B20

208V, 1600A

FU FED ATS-2 N

800A/800A

CBL-0036

500 kcmil - 50 ft 2 per phase

E N

ATS-2

ATS-2-N

208V

CBL-0037

500 kcmil - 35 ft 2 per phase

ATS-2- LOAD

208V

BUS #4

208V

FU FED T/L (RM 1097)

150A/150A

CBL-0038

1/0 AWG - 45 ft 1 per phase

T/L (RM 1097)

208V

CBL-0039

3/0 AWG - 40 ft 1 per phase

PANEL E1D (RM 1D2)

208V, 225A

CBL-0040

3/0 AWG - 45 ft 1 per phase

PANEL E2A (RM2035)

208V, 250A

CBL-0041

3 AWG - 45 ft 1 per phase

ELEV. #5

208V

CBL-0042

3 AWG - 40 ft 1 per phase

ELEV. #4 (RM3078)

208V

FU FED CYSTO X-RAY

150A/150A

CBL-0043

2/0 AWG - 45 ft 1 per phase

CYSTO.X-RAY (RM3085)

208V

CBL-0044

3 AWG - 35 ft 1 per phase

PANEL E4A3 (RM 4054B)

208V, 125A

CBL-0045

3/0 AWG - 20 ft 1 per phase

PANEL E6A2

208V, 225A

CBL-0046

8 AWG - 20 ft 1 per phase

PANEL E7A1

208V, 125A

CBL-0047

500 kcmil - 45 ft 1 per phase

PANEL EP

208V, 600A

FU FED PANEL BD2

200A/200A

CBL-0048

3/0 AWG - 45 ft 1 per phase

PANEL BD2

208V, 225A

FU FED PANEL BD1

100A/100A

CBL-0049

1 AWG - 45 ft 1 per phase

PANEL BD1

208V, 125A

FU FED PANEL GP1

200A/200A

CBL-0050

3/0 AWG - 55 ft 1 per phase

PANEL GP1

208V, 225A

CBL-0051

3/0 AWG - 25 ft 1 per phase

PANEL GP2

208V, 225A

FU FED PANEL BA2

60A/60A

CBL-0052

3 AWG - 40 ft 1 per phase

PANEL BA2

208V, 125A

FU FED BUS #5

600A/600A

CBL-0053

350 kcmil - 55 ft 2 per phase

BUS #5

208V, 125A

FU FED PANEL GA3

100A/100A

CBL-0054

3 AWG - 40 ft 1 per phase

PANEL GA3 (RM 07T)

208V, 125A

FU FED PANEL PL1

200A/200A

CBL-0055

3/0 AWG - 55 ft 1 per phase

PANEL PL1 (PHARM)

208V, 225A

FU FED PANEL 1C

100A/100A

CBL-0056

3 AWG - 50 ft 1 per phase

PANEL 1C )RM 1037)

208V, 125A

FU FED PANEL 2A3

200A/200A

CBL-0057

3/0 AWG - 50 ft 1 per phase

PANEL 2A3 (RM 2035)

208V, 125A

FU FED PANEL 2B

100A/100A

CBL-0058

3 AWG - 40 ft 1 per phase

PANEL 2B (RM 2014)

208V, 125A

CBL-0059

3 AWG - 18 ft 1 per phase

PANEL 2BS (RM2014)

208V, 125A

FU FED PANEL 3C

100A/100A

CBL-0060

3 AWG - 50 ft 1 per phase

PANEL 3C ( RM 3044)

208V, 125A

FU FED PANEL 4A3

100A/100A

CBL-0061

3 AWG - 50 ft 1 per phase

PANEL 4A3 (RM 4031A)

208V, 125A

FU FED PANEL 4B

100A/100A

CBL-0062

3 AWG - 65 ft 1 per phase

PANEL 4B (RM 4B)

208V, 125A

FU FED BUS #8

600A/600A

CBL-0063

350 kcmil - 55 ft 2 per phase

BUS # 8

208V, 125A

FU FED PANEL 1A1

100A/100A

CBL-0064

3 AWG - 35 ft 1 per phase

PANEL 1A1 (RM 1A1)

208V, 125A

FU FED PANEL GG

100A/100A

CBL-0065

3 AWG - 35 ft 1 per phase

PANEL GG

208V, 100A

FU FED PANEL 2A1

100A/100A

CBL-0066

3 AWG - 30 ft 1 per phase

PANEL 2A1 (RM 2A1)

208V, 125A

FU FED PANEL 2F

100A/100A

CBL-0067

3 AWG - 40 ft 1 per phase

PANEL 2F (RM 2F)

208V, 125A FU FED PANEL 3A1

100A/100A

CBL-0068

3 AWG - 35 ft 1 per phase

PANEL 3A1 (RM 3A1)

208V, 125A

FU FED PANEL 3E

100A/100A

CBL-0069

3 AWG - 40 ft 1 per phase

PANEL 3E (RM 3110A)

208V, 125A FU FED PANEL 4F

100A/100A

CBL-0070

3 AWG - 35 ft 1 per phase

PANEL 4F (RM 4100)

208V, 125A

FU FED PANEL 5A1

100A/100A

CBL-0071

3 AWG - 40 ft 1 per phase

PANEL 5A1 (RM 5A1)

208V, 125A

FU FED PANEL E1D

200A/200A

FU FED PANEL E2A

200A/200A

FU FED ELEV #5

100A/100A

FU FED ELEV #4

100A/100A

FU FED PANEL E4A3

100A/100A

FU FED PANEL E6A2

100A/100A

FU FED PANEL EP

400A/400A

GEN-#1 (B16)

900 kW 208 V

CB-SWBD 16B MAIN

3000A/3000A/3000A

LTPU 1 (3000A)

SWBD 16B-GDP

208V

CB FED ATS-2 E

1200A/800A/800A

LTPU 1 (800A)

CBL-0073

500 kcmil - 50 ft 2 per phase

ATS-2-E

208V

CB FED ATS 4

600A/600A/600A

LTPU 600 (600A)

CBL-0074

350 kcmil - 60 ft 2 per phase

CB FED ATS-3

1200A/800A/800A

LTPU 0.5 (400A)

CBL-0075

500 kcmil - 45 ft 1 per phase

CB FED 1-ATS-5

600A/600A/600A

LTPU 600 (600A)

CBL-0076

350 kcmil - 45 ft 2 per phase

CB FED ATS 1

1200A/800A/800A

LTPU 1 (800A)

CBL-0077

500 kcmil - 55 ft 2 per phase

CB FIRE PUMP 2

1200A/800A/800A

LTPU 1 (800A)

CBL-0261

1/0 AWG - 50 ft 1 per phase

CB FED ATS-MRI

1200A/800A/800A

LTPU 1 (800A)

CBL-0296

500 kcmil - 50 ft 2 per phase

CB FED URGENT CARE

1200A/800A/800A

LTPU 0.7 (560A)

CBL-0297

500 kcmil - 50 ft 2 per phase

Open CB FED SWGR 20-SB 1200A/800A/800A

LTPU 1 (800A)

CBL-0298

500 kcmil - 55 ft 2 per phase

Open CB FED SWGR 20 SB 1200A/800A/800A

LTPU 1 (800A)

CBL-0299

500 kcmil - 60 ft 2 per phase

CBL-0306

500 kcmil - 50 ft 8 per phase

208 GEN MAIN

208V

CB GEN MAIN

3000A/3000A/3000A

LTPU 1 (3000A)

CBL-0315

8 AWG - 15 ft 1 per phase

DISC MACH RM. A/C

208V

CBL-0316

3/0 AWG - 40 ft 1 per phase

SERVICE DISC (E6A2)

208V

CBL-0317

8 AWG - 20 ft 1 per phase

DS-AIR COMPRESSOR (E6A2)

208V

FU-FED E6A1

100A/100A

CBL-0318

3 AWG - 45 ft 1 per phase

PANEL E6A1

208V

CBL-0321

3 AWG - 20 ft 1 per phase

DISC- ELEV. #4

208V

CBL-0322

3 AWG - 18 ft 1 per phase

DISC- ELEV. #5

208V

CBL-0324

3 AWG - 25 ft 1 per phase

PANEL 2A3S

208V, 125A

CB FED 2A3S

225A/100A/100A

CB E6A1 MAIN

100A/100A/100A

CB FED ELEV-1

150A/150A/150A

CBL-0342

1/0 AWG - 45 ft 1 per phase

DISC-ELEV-1

208V

CBL-0343

1/0 AWG - 45 ft 1 per phase

S

P

TR-FED ELEV-1

34/34 kVA 208 / 460 V

5.00 %Z

ELEV 1 (THY-KRUPP)

460V

CB FED ELEV-2

150A/150A/150A

CBL-0344

1/0 AWG - 45 ft 1 per phase

DISC-ELEV-2

208V

CBL-0345

1/0 AWG - 45 ft 1 per phase

S

P

TR-FED ELEV-2

34/34 kVA 208 / 460 V

5.00 %Z

ELEV 2 (THY-KRUPP)

460V

CB FED ELEV-3

200A/175A/175A

CBL-0346

1/0 AWG - 45 ft 1 per phase

DISC-ELEV-3

208V

CBL-0347

1/0 AWG - 45 ft 1 per phase

S

P

TR-FED ELEV-3

34/34 kVA 208 / 460 V

5.00 %Z

ELEV 3 (THY-KRUPP)

460V

Poplar Bluff VA Arc Flash Study Poplar Bluff, MO

JOB NUMBER

SPG22461

REVISION: 1

DATE: 7/21/2023

DESCRIPTION:

EP002

FIRE PUMP #2

EP002.DRW

EP002.DRW

EP001.DRW

CBL-0017

500 kcmil - 45 ft 4 per phase

SWBD 20 - D B20

208V, 1600A

FU FED BUS #7

600A/600A

CBL-0078

350 kcmil - 50 ft 2 per phase

BUS #7

208V

FU FED BUS #2

600A/600A

CBL-0079

350 kcmil - 50 ft 2 per phase

BUS #2

208V

FU FED PANEL PL

200A/200A

CBL-0080

4/0 AWG - 45 ft 1 per phase

PANEL PL

208V, 225A

FU FED ATS -1 N

800A/800A

CBL-0081

500 kcmil - 30 ft 2 per phase

EN

ATS - 1

ATS-1 N

208V

FU FED FIRE PUMP #2

800A/800A

CBL-0082

1/0 AWG - 30 ft 1 per phase

ATS-FP2 LOAD

208V, 225A

FU FED PANEL BSL

250A/250A

CBL-0083

4/0 AWG - 45 ft 1 per phase

PANEL BSL

208V, 225A

CB BSL MAIN

225A/225A/225A

CBL-0084

500 kcmil - 50 ft 2 per phase

ATS-1 LOAD

208V

BUS #3

208V

CBL-0077

500 kcmil - 55 ft 2 per phase

ATS-1 E

208V

FU - FED PANEL GA1

100A/100A

CBL-0085

3 AWG - 45 ft 1 per phase

PANEL GA1

208V, 125A

CBL-0086

6 AWG - 18 ft 1 per phase

PANEL PAVIL (B25)

208V

FU - FED PANEL 1F

100A/100A

CBL-0087

3 AWG - 45 ft 1 per phase

PANEL 1F

208V, 125A

FU - FED PANEL 1E

100A/100A

CBL-0088

3 AWG - 45 ft 1 per phase

PANEL 1E

208V, 125A

FU - FED PANEL 2E

100A/100A

CBL-0089

3 AWG - 55 ft 1 per phase

PANEL 2E

208V, 125A

FU - FED PANEL 3F

100A/100A

CBL-0090

3 AWG - 65 ft 1 per phase

PANEL 3F

208V, 125A

FU - FED PANEL 4A1

100A/100A

CBL-0091

3 AWG - 70 ft 1 per phase

PANEL 4A1

208V, 125A

FU - FED PANEL 4E

100A/100A

CBL-0092

3 AWG - 70 ft 1 per phase

PANEL 4E

208V, 125A

FU - FED PANEL GA2

100A/100A

CBL-0093

3 AWG - 45 ft 1 per phase

PANEL GA2

208V, 125A

FU - FED PANEL 1D

100A/100A

CBL-0094

3 AWG - 40 ft 1 per phase

PANEL 1D

208V, 125A

FU - FED PANEL KA

200A/200A

CBL-0095

3/0 AWG - 50 ft 1 per phase

PANEL KA

208V, 200A

CB KA MIAN

225A/200A/200A

FU - FED PANEL 1A2

100A/100A

CBL-0096

3 AWG - 45 ft 1 per phase

PANEL 1A2 RM.1068A

208V, 125A

FU - FED PANEL 2A2

100A/100A

CBL-0097

3 AWG - 45 ft 1 per phase

PANEL 2A2 RM.2000B

208V, 125A

FU - FED PANEL 3A2

100A/100A

CBL-0098

3 AWG - 50 ft 1 per phase

PANEL 3A2 RM.3A2

208V, 125A

FU - FED PANEL 5A2

100A/100A

CBL-0099

3 AWG - 60 ft 1 per phase

PANEL 5A2 R5045

208V, 125A

FU - FED PANEL 6A2

100A/100A

CBL-0100

3 AWG - 75 ft 1 per phase

PANEL 6A2

208V, 125A

PANEL CGW

208V, 125A

CBL-0102

6 AWG - 12 ft 1 per phase

PANEL CGA

208V

FU FED PANEL CGE

100A/100A

CBL-0103

3 AWG - 30 ft 1 per phase

PANEL CGE RM.07T

208V, 225A

FU FED PANEL TEL

100A/100A

CBL-0104

3 AWG - 50 ft 1 per phase

PANEL TEL

208V, 125A

FU FED PANEL C1W

100A/100A

CBL-0105

3 AWG - 45 ft 1 per phase

PANEL C1W RM.1A1

208V, 125A

FU FED PANEL C1E

100A/100A

CBL-0106

3 AWG - 50 ft 1 per phase

PANEL C1E RM.1A3

208V, 125A

FU FED PANEL C2E

100A/100A

CBL-0107

3 AWG - 65 ft 1 per phase

PANEL C2E RM.2035

208V, 125A

FU FED PANEL E2B

200A/200A

CBL-0108

3/0 AWG - 65 ft 1 per phase

PANEL E2B RM.2014

208V, 225A

FU FED PANEL C2W

100A/100A

CBL-0109

3 AWG - 65 ft 1 per phase

PANEL C2W RM.2A1

208V, 125A

FU FED PANEL C3DP

400A/400A

CBL-0110

500 kcmil - 70 ft 1 per phase

PANEL C3DP .RM.3A2

208V, 400A

CBL-0111

3 AWG - 20 ft 1 per phase

PANEL C3DP2

208V, 125A

CBL-0112

4/0 AWG - 20 ft 1 per phase

PANEL C3N RM.3063

208V, 225A

CBL-0113

250 kcmil - 18 ft 1 per phase

PANEL C3E1 RM.3110A

208V, 250A

CBL-0114

3 AWG - 15 ft 1 per phase

PANEL C3E RM.3034A

208V, 125A

CBL-0115

3 AWG - 18 ft 1 per phase

PANEL C3-ICU RM.3022

208V, 225A

CBL-0116

3 AWG - 20 ft 1 per phase

PANEL C3W RM.3A1

208V, 125A

FU FED PANEL C4W

100A/100A

CBL-0117

3 AWG - 70 ft 1 per phase

PANEL C4W RM 4A1

208V, 125A

FU FED PANEL C4E

100A/100A

CBL-0118

3 AWG - 75 ft 1 per phase

PANEL C4E RM.4031A

208V, 125A

FU FED PANEL C5W

100A/100A

CBL-0119

3 AWG - 85 ft 1 per phase

PANEL C5W RM 5A1

208V, 125A

FU FED PANEL C5E

100A/100A

CBL-0120

3 AWG - 85 ft 1 per phase

PANEL C5E RM.5010

208V, 125A

CB FIRE PUMP 2

1200A/800A/800A

LTPU 1 (800A)

CBL-0261

1/0 AWG - 50 ft 1 per phase

FU FED PANEL CGW

100A/100A

CBL-0293

3 AWG - 25 ft 1 per phase

E N

ATS-FP2

ATS-FP-2-N

208V

ATS-FP-2-E

208V

DISC-FP-2

208V

CBL-0303

1/0 AWG - 3 ft 1 per phase

CBL-0305

300 kcmil - 25 ft 3 per phase

FP-2 (BSMT)

208 V 30 hp

CB E2B MAIN

225A/200A/200A

CB C3DP MAIN

225A/200A/200A

CB C3W

100A/100A/100A

CB C3

100A/100A/100A

CBC3E

100A/100A/100A

CB C3E1

100A/100A/100A

CB C3N

100A/100A/100A

CB C3DP2

100A/100A/100A

CBL-0339

2 AWG - 100 ft 1 per phase

CB FED PANEL IN COS2

125A/125A/125A

PANEL OI/T-SERVER RM (NEW)

208V

Poplar Bluff VA Arc Flash Study Poplar Bluff, MO

JOB NUMBER

SPG22461

REVISION: 1

DATE: 7/21/2023

DESCRIPTION:

EP003

EP001.DRW

CABLE LIMTERS

208V

CBL-0121

350 kcmil - 45 ft 1 per phase

CBL-0122

350 kcmil - 75 ft 2 per phase

CBL-0123

500 kcmil - 65 ft 1 per phase

SWBD 6-DP BLDG. 6

208V, 400A

FU FED7-ATS-1-N

600A/600A

CBL-0124

350 kcmil - 30 ft 2 per phase

DISC-7-ATS-1-N (T3)

208V

EN

7-ATS-1 BLDG.7

CBL-0125

350 kcmil - 35 ft 2 per phase

7-ATS-1-LOAD

208V

SWBD 7-GDP-1 (BLDG.7)

208V, 600A

CBL-0126

500 kcmil - 35 ft 2 per phase

7-ATS-1-E

208V

FU FED 7-ATS-1-EMERG

600A/600A/300A

LTPU 100 % (300A)

GEN-#2 (BLDG 7)

150 kW 208 V

BUS-0141

208V

FU FED SWBD-6-DP

400A/400A

SWBD 8-MDP BLDG 8

208V

CB FED PANEL 8L2

225A/225A/225A

CBL-0127

1/0 AWG - 80 ft 1 per phase

PANEL 8L2 (B.8)

208V, 225A

CB FED PANEL 8L2A

225A/225A/225A

CBL-0128

1/0 AWG - 75 ft 1 per phase

PANEL 8L2A (B.8)

208V, 225A

CB FED PANEL 8LS

225A/225A/225A

CBL-0129

1/0 AWG - 80 ft 1 per phase

PANEL LS (B.8)

208V

CB FED PANEL 8L2B

100A/100A/100A

CBL-0130

6 AWG - 25 ft 1 per phase

PANEL BL2B (B.8 WELD.RM)

208V

CB FED PANEL 8L2C

100A/70A/70A

CBL-0131

3 AWG - 30 ft 1 per phase

PANEL BL2C (B.8 WELD.RM)

208V, 70A

FU-FEDPANEL 7P1

500 kcmil - 85 ft 1 per phase

FU-FEDPANEL 23EP

100A/100A

FU-FEDPANEL 7L1

100A/100A

CBL-0133

1 AWG - 50 ft 1 per phase

PANEL 23EP BLDG.23

208V, 100A

CBL-0134

1 AWG - 85 ft 1 per phase

PANEL 7L1 BLDG.7

208V

FU-FEDPANEL 7G

100A/100A

CBL-0135

3 AWG - 85 ft 1 per phase

PANEL 7G BLDG.7

208V, 100A

FU-FEDPANEL 7P2

200A/200A

CBL-0136

4/0 AWG - 85 ft 1 per phase

PANEL 7P2 BLDG.7

208V, 225A

FU FED PANEL 7P1

400A/350A

CBL-0137

500 kcmil - 25 ft 1 per phase

DISC FED PANEL 7P1

208V

PANEL 7P1

208V, 400A

CB PANEL 7P1 MAIN

400A/350A/350A

CB FED 7-MCC

100A/100A/100A

CBL-0138

3 AWG - 30 ft 1 per phase

7 - MCC BLDG.7

208V, 100A

FU FED PANEL 6P1

200A/200A

CBL-0139

3/0 AWG - 75 ft 1 per phase

PANEL 6P1 B.6 1ST FL

208V, 225A

FU FED PANEL 6L1

100A/100A

CBL-0140

3 AWG - 75 ft 1 per phase

PANEL 6L1 B.6 1ST FL

208V, 125A

FU FED 4-PANEL

100A/100A

CBL-0141

3 AWG - 40 ft 1 per phase

4-PANEL

208V

FU FED CIRCUIT 7

30A/30A

CBL-0142

10 AWG - 45 ft 1 per phase

CIRCUIT - 7

208V

FU FED VAC PUMP

30A/30A

CBL-0143

10 AWG - 45 ft…