022712 SCC and OCPD Coordination Study - VA Loma Linda.pdf

February 14, 2012

Prepared For:

Soltek Pacific Construction

2424 Congress Street

San Diego, CA 92110

619.296.6247

Prepared By:

Rizza Engineering, Inc.

Michael A. Rizza, PE, LEED AP

12320 Stowe Drive, Suite G

Poway, CA 92064

858.254.7737

Short Circuit Current &

OCPD Coordination Study VA Loma Linda - Paralleled Gensets

Loma Linda, CA

VA Loma Linda – Paralleled Gensets SCC and OCPD Coordination Study

11020001

February 13, 2012

12320 Stowe Drive, Suite G | Poway, CA 92064 | 858.254.7737 | www.rizzaengineering.com

Table of Contents

1.0 Acknowledgements

2.0 Introduction

3.0 Project Scope

4.0 Circuit Background

5.0 Basic Data and Engineering Assumptions

6.0 Single Line Diagram

7.0 Short Circuit Current Study

7.1 General Information

Short Circuit Study Methodology

Short Circuit Study Data

8.0 Overcurrent Protective Device Coordination Study

Coordination Study Methodology

Coordination Study Data

9.0 Reports

9.1 Overcurrent Protective Device Coordination Evaluation

Conductor & Bus Protection

Transformer Protection

9.2 Input Data Report

9.3 Fault Analysis Summary Report – Normal & Emergency

9.4 Time Current Curves – Normal & Emergency

10.0 Conclusion

11.0 Data Requirements ............................................................................ Error! Bookmark not defined.

12.0 Power System Studies ........................................................................ Error! Bookmark not defined.

13.0 Definitions

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1.0 Acknowledgements

Rizza Engineering would like to thank Soltek Pacific Construction for the opportunity to provide this service.

We also would like to thank Randall Lamb Associates, Inc. and Neal Electric for their due diligence in accurately obtaining the component characteristics and input data information required to perform this study and produce this report.

February 13, 2012

12320 Stowe Drive, Suite G | Poway, CA 92064 | 858.254.7737 | www.rizzaengineering.com

2.0 Introduction

In the field of electrical engineering, there are many tools to evaluate different aspects of electricity, but the most critical aspect is always safety of life. Second, are the safety, protection, and reliability of the components of the electrical distribution system itself as well as the facility(s) they serve.

Power protection involves using protective devices such as fuses or circuit breakers to insure that in cases of short circuit faults or system overload, components are not damaged and as little of the system is affected as possible. In order to provide adequate protection of human life and material components of the electrical distribution system, these overcurrent conditions must be simulated, analyzed, and recommendations made and implemented.

This report has been prepared to inform relevant personnel of the findings of a Short Circuit Current Study and an Overcurrent Protective Device Coordination Study (also referred to as Coordination Study or

Selective Coordination) for the VA Loma Linda Emergency Generator located at the VA Loma Linda

Healthcare Center, Loma Linda, California. Due to the technical nature of these studies, we will attempt to explain in brief, and in laymen’s terms, the methodologies used and any significant findings.

It's not uncommon for individuals to be unfamiliar, or confused, when it comes to understanding short circuit current, associated ratings, or a coordination study. Many times the questions arise, "What are Short

Circuit and Coordination Studies?" or "Why should such studies be performed on electrical distribution systems?”. This report has been written in part to give a better understanding of these types of studies, as well as an understanding of the importance of having such studies performed on a periodic basis. Circuit breakers and fuses come with an overcurrent rating and a short circuit interrupting rating. Overcurrent ratings specify the amount of electrical current the device should tolerate without initiating a fuse blowing or circuit breaker tripping condition. The short circuit current rating is the maximum electrical current the device can tolerate before it fails. While a Short Circuit Study can be performed independently of a

Coordination Study, the results of the Short Circuit Study have a bearing on obtaining meaningful results from a Coordination Study.

Let’s examine how each study is composed and what they can tell about the electrical power distribution system analyzed. The studies where performed using relevant characteristics of the electrical power distribution system at the subject facility. These characteristics compose the input data entered in the equipment data fields in the studies and are derived from utility sources, conductors, overcurrent protective devices (OCPDs), motors, and transformers (and in other cases capacitors and relays).

This report has been written to give a better understanding of these types of studies, as well as an understanding of the importance of having such a study performed on a periodic basis when modifications to the electrical system are being performed. We will explain how each type of study is generated and what the study can tell about your electrical power distribution system.

We have performed this study using PowerTools for Windows® (PTW) by SKM Systems Analysis, Inc.

software with the Dapper and Captor analysis modules. Although not an exact science, this software is comprehensive in that it allows for the design and simulation of the electrical distribution system as well as power generation, transmission, and alternate distribution and protective schemes. While a Short Circuit

Study can be performed independent of a Coordination Study, and vice versa, the results of the studies do have an impact on each other in obtaining meaningful results for equipment selection and protection.

Strong efforts have been made to obtain, model, and present the system as close as possible to reality.

The National Electric Code (NEC) addresses the significance of this type of study in Articles 110.9, 110.10, and 240. It is clear that a study performed during the equipment submittal process can prove to be invaluable by proper equipment selection. Studies such as this can help manage the increasing complexities of maintaining a safe, reliable and efficient electrical distribution system after the initial installation.

February 13, 2012

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3.0 Project Scope

The primary objective of this study is to model the new emergency generator distribution system for the electrical distribution system and determine protective device coordination to achieve optimum equipment protection, selectivity, and reliability.

The OCPDs consist of several adjustable and non-adjustable circuit breakers. This requires the understanding and effective use of the software to selectively coordinate the aforementioned devices.

In order to better evaluate the objectives above, it is also a part of this scope to calculate, giving the input data available, what the short circuit currents are at various points in the system.

February 13, 2012

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4.0 Circuit Background

The circuit analyzed for this study is a low-voltage circuit as defined by IEEE. It is a radially configured electrical distribution system, meaning power is distributed and utilized in one direction only with no loops, in this case, from the uppermost portion of the circuit to the lower portion - line to load.

Power is provided to this circuit from one of two independent sources. The first source, labeled ‘Utility’, is the Owner’s existing normal source distribution system. This primary source provides power to the system under normal operating conditions. The second source, labeled ‘Generator’, is a bank of four 631 kVA

Generators paralleled onto the bus of the paralleling switchboard “SBEP” and multiple automatic transfer switches. This accumulated source serves as a backup source which will only be used for emergency situations when primary power is unavailable or when the primary source needs to be de-energized for maintenance and repair.

The protective device settings and ratings recommended in this study are based on providing adequate overload and to withstand protection for conductors, transformers, and equipment. In addition, selectivity will be achieved, in all possible instances, by establishing suitable time margins between device operating points. These time margins shall be consistent with the recommendations of the prevailing codes and industry standards from IEEE.

February 13, 2012

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5.0 Basic Data and Engineering Assumptions

Basic data for the studies, including the system configuration and specific details for the system components were obtained from the following sources:

• Available short circuit contribution from the Owner’s existing electrical distribution system

(interpreted as the utility available short circuit contribution for this project.)

• Project Plans

• Equipment Submittals

• Emergency Generator Supplier

The following engineering assumptions are hereby made:

• Overcurrent protective devices of the same frame type and size fed from the same bus have only been modeled once in the time-current-curve (TCC) to minimize redundancy

• Selection of only OCPDs in line with one another and having small ratios in size for representation of the worst case scenarios.

• Where the software library did not contain exact components for the model, the software company was contacted and in some cases was able to provide component libraries. Otherwise where components did not exist, close approximations have been made using similar components.

February 13, 2012

12320 Stowe Drive, Suite G | Poway, CA 92064 | 858.254.7737 | www.rizzaengineering.com

6.0 Single Line Diagram

Single Line Diagrams are essential to electrical systems. They are considered to be the single most important component to an electrical system and are the fundamental first step in designing, managing, maintaining, and decommissioning an electrical system. They also are a required first step for an electrical system analysis and any changes or modifications to the electrical distribution and protection system and can easily indicate any relevant part of a power system.

A basic tool for understanding and assessing the electrical distribution system, Single Line Diagrams first illustrate major components of the electrical system and their interconnections. They then provide more detailed information on what kind of power is being provided to these components including voltages and amperages. They also indicate where components reside in the system and potentially where they exist in the facility. They can be an indication of how much power you have in an area of your facility and any interconnections or dependencies within the electrical system.

Alterations to the electrical distribution system challenge the protection and reliability it provides. This includes, but is not limited to, an expansion of the system, reconfiguration, simple relocation of components, addition of even small loads, and in some cases just minor upgrades. In almost all cases, Single Line Diagrams are a required necessity for any code reviewing authority, i.e. City Permit or Plan

Check in addition to the Engineer-of-Record.

Single Line Diagrams are usually drawn with computer software and usually fit on a single plotted sheet of large format paper for a comprehensive view of the electrical system. Larger systems may be spread out over multiple plotted sheets.

February 13, 2012

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7.0 Short Circuit Current Study

The primary reason for performing a Short Circuit Current Study on a power system is to calculate the available short circuit fault current at each bus location to facilitate the selection of protective device interrupting ratings and bus bracing. A protective device must be able to interrupt the available short circuit fault current at its location in the power system, therefore the protective device must have an interrupting rating equal to or greater than that available short circuit fault current.

The study is generated assuming a three phase symmetrical RMS fault current condition (balanced fault);

since this is the type of fault typically considered to produce the maximum available fault current and hence is usually used as the basis for the selection of protective device interrupting ratings. Maximum current occurs because there is less impedance between the source of power and the point of the fault than there is in any other type of fault be it phase-to-phase, two phases to ground, or single phase to ground. Impedance between the power source and the point of fault is the deterrent to current flow; the more impedance, the less current flow and vice versa. Current-limiting or impedance sources in a power system are conductors, circuit breakers, fuses, transformers, reactors, switches, and connections. Current sources are generators and, at the time of faults, capacitors and motors.

Another reason for performing a Short Circuit Current Study on a power system is to calculate the available three phase symmetrical RMS fault current at each bus location so that it may be used as a component of a

Protective Device Coordination Study.

Short Circuit Analysis Study Benefits:

• Added safety of personnel

• Provide safer power systems by identifying overly stressed system components

• Identify deficiencies or problems in system component ratings

• Indicate areas of concern in the system

• Calculate maximum fault current levels in various locations within the system and the needed equipment ratings to safely handle those levels of fault current.

• Identify and recommend corrective action and solutions for under protected equipment

• Ensure compliance with NFPA and NEC requirements as well as ANSI and IEEE standards

• Identify if the system and equipment can withstand the available fault currents

• Evaluate the application of circuit breakers, fuses, and protective relays.

• Develops a computer model of the electrical system.

A reality often overlooked is that failures often occur within an electrical distribution system over time. It is usually a matter of when a fault will occur, not if.

The ANSI, UL and NEMA Standards outline the preferred method used to calculate the fault duty for electrical equipment. The equipment is required to withstand the thermal and mechanical stresses produced by a short-circuit current. The calculated fault duty is compared to the equipment ratings to verify that that the equipment will safely withstand the maximum available fault currents. The calculated fault duty is required to adequately determine the short circuit withstand and interrupting ratings for the electrical apparatus.

This study examines the size and settings of protective devices in system. NEC requirements and

ANSI/IEEE standards are considered to determine if existing devices are adequately applied.

Recommended sizes and/or settings are provided in a written report aimed towards improving system protection and coordination. The results from the short-circuit study are also used to provide selective coordination of the TCCs of the protective devices throughout the electrical system.

In the Short Circuit Study, the points at which faults are assumed are located on the source side of the device which will be called upon to interrupt the power system when an actual fault occurs. This is done to

February 13, 2012

12320 Stowe Drive, Suite G | Poway, CA 92064 | 858.254.7737 | www.rizzaengineering.com determine whether or not the device will be able to interrupt the current available at the time of the fault.

Many times the source side of the interrupting device is an electrical bus in a piece of switchgear. When short circuit current flows through the bus bars, extreme forces are exerted between the different phases of the bus bars. When a fault occurs, the current magnitude is greater than normal current flow, and the forces between the bus bars are increased by the square of the current increase. Thus if the fault current is four times normal, the forces between the phases are sixteen times as great. The Short Circuit Study gives us the information necessary to determine if our breakers and fuses are capable of interrupting a fault, as well as the means of determining whether or not the bus sections of the switchgear are supported adequately to withstand the forces generated from the fault currents. In addition, this type of study tells us the maximum current available to operate an electrical protective device (i.e., Molded Case Circuit Breaker, Low Voltage

Power Circuit Breaker, Relays, Fuses, etc.).

The short circuit study can lessen the risk the facility owner faces and help avoid catastrophic losses. It's about safety & reliability. The short circuit study is fundamental. Far too often, the electrical system goes through changes without serious consideration of short circuit levels, and equipment ratings. Even new buildings and installations are not immune from failures. The results can be expensive at best, catastrophic at worst. Fault levels vary from system to system, and location to location. This study calculates the maximum available short circuit current at various points throughout the system. Calculated values are then used to evaluate the application of protective devices, and to develop circuit breaker trip settings.

The Short Circuit and Coordination Studies can reduce the risks a facility owner faces and help avoid catastrophic losses. The study will determine the magnitude of currents flowing throughout the power system at various time intervals after a fault occurs and evaluates the size and settings of a system’s protective devices, such as relays, fuses and circuit breakers, and the circuits they protect.

The goal is to provide transformers, switchboards, panelboards and other electrical equipment with the required protection. The study also assists with selecting appropriate types, ampere ratings and device settings to ensure minimum service interruption under overload and short circuit conditions and to ensure the protective device closest to the overload or short-circuit condition is the one that operates in order to isolate the failure as quickly as possible.

7.1 General Information

A library database of components is used to select the proper component and enter the associated input data to model the system. This data includes feeders (raceways and cables), circuit breakers, fuses, protective relays, switchgear, switchboard, and panelboard equipment assemblies. Once complete with proper components and arrangement and all required input data has been entered, the model is ran.

Short Circuit Study Methodology

The Short Circuit Study was performed using the DAPPER Comprehensive Fault Analysis Module within

PTW. The systematic Short Circuit Study methodology begins by developing a Single Line Drawing within the software program that defines the electrical characteristics of the power system. Each of the power system components (utility sources, induction motors, transformers, cables, protective devices, etc.)

is modeled accordingly. When the study is run the software program places an assumed three phase fault at each bus location in the system and the available short circuit fault current is calculated for each bus location. The results of the computer generated study are as indicated in this report.

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Short Circuit Study Data

The data generated by the DAPPER module consists of the following:

• One Line Drawing

• Input Data Report

• Fault Analysis Summary Report - Normal

• Fault Analysis Summary Report - Emergency

Using the available Single Line Diagram along with field collected and verified data, the electrical distribution system is modeled to determine fault currents that could exist in the system under abnormal operating conditions or failures. A library database of components is used to select the proper components and enter the associated input data to model the system.

These components consist of utility sources, conductors, motors, transformers, and OCPDs.

Source impedances and input data for feeders, motors, transformers, and other relevant system components is entered in the equipment data fields.

This data includes feeders (complete with raceways and conductors), circuit breakers, fuses, switchgear, switchboard, and panelboard equipment assemblies. Once complete with proper components and arrangement and all required input data has been entered, the model is ran.

The Input Data Report summarizes the bus-to-bus interconnections and data used in performing the Short

Circuit Study. The identification of buses was taken from the project documents. Each bus represents one of the following: a utility contribution point, a service end box, a switchboard a panelboard bus, or a motor connection point.

The Fault Analysis Summary Report - Normal provides the three phase symmetrical RMS fault current for each major point (bus) in the power system under “normal” conditions - when the system is being fed by power from the utility.

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8.0 Overcurrent Protective Device Coordination Study

Overcurrent Protective Device Coordination, sometimes simply referred to as “Selective Coordination”, is when a downstream overcurrent protective device (breaker/fuse/relay) activates before an upstream device upon a trip condition. We define it as properly clearing a fault condition so as not to allow other areas or devices within the electrical system to be exposed to or react to an overcurrent condition. Coordination maximizes the electrical distribution system selectivity by isolating faults as quickly as possible to the nearest protective device, as well as minimizing the portion of the electrical distribution system affected by an overcurrent or other non-normal operating condition such as nuisance tripping due to transformer inrush or motor starting, all while maintaining power to the rest of the system.

Coordination studies are performed to determine and ensure the proper selection of, and settings for, overcurrent protective devices. It is the process whereby circuit breaker, fuse, and/or protective relay operating characteristics are overlaid and compared against one another so that a single device may be selected for the clearing of specific fault conditions.

Coordination studies for industrial and commercial facilities are performed in accordance with accepted industry practices and procedures, consistent with ANSI/ IEEE Standard 242-2001, "IEEE Recommended

Practice for Protection and Coordination of Industrial and Commercial Power Systems". Coordination studies for electric utilities are based on their specific fusing and reclosing practices.

Ideally in any electrical distribution system, when a fault event occurs it is desirable to interrupt and remove only that portion of the electrical system in distress, leaving the remaining system intact. When this is accomplished a system is said to be coordinated. A coordinated system occurs only with the proper selection of the operating characteristics of its electrical protective devices, starting with the device most remote from the power source. The setting for this remote device is based at its source-side terminals.

Therefore, without a Short Circuit Study it is possible to set or select electrical protective devices to operate at a current value higher than the available fault current the protective device will see.

Coordination studies take into consideration the pre-load and ambient-temperature adjustments on fuse minimum-melting curves, transformer magnetizing-inrush current, full-load current, hot-load and cold-load pick-up, and coordination time intervals for series-connected devices.

To determine device coordination, a short-circuit fault analysis must first be performed. The goal of the short circuit study is to find the maximum fault current throughout the system.

Most electrical power distribution systems are not planned with protective device coordination in mind. A distribution system can be designed for minimum losses and minimum upfront investment and yet fail miserably in the proper coordination of the protective devices. As a result equipment failures within the system can easily result in the shutdown of the entire plant or office building. There have been many instances where the failure of a single motor or branch circuit within a building has resulted in the shutdown of most of the facility.

Another benefit of a coordination study results in the interrupting ratings of all protective equipment, conductors, and switches are checked for adequacy. Inadequate equipment ratings can result in either extensive damage to the equipment during faults and system operation and may introduce hazards to plant operating personnel.

The failures themselves can result from a number of causes; operator error, aging of equipment, weather induced failures. Regardless of the cause, the effect is the same. Various parts of a system will be left without power. In some instances where electrical systems have been designed by untrained individuals, injury can be the result of equipment failure. The injury results when electrical equipment virtually explodes because the equipment was designed with inadequate capacity to handle the magnitude of short

February 13, 2012

12320 Stowe Drive, Suite G | Poway, CA 92064 | 858.254.7737 | www.rizzaengineering.com circuit current within the system or when equipment malfunctions. Such an event may be classified as an arc flash event.

Where insulation failures have resulted in short circuits (faults), it would be desirable that the electrical protective devices operate to minimize both the damaged caused by the fault and the impact of the fault on the rest of the system. The analysis procedure that looks at the fault possibilities and their impact on the electrical system is known within the industry as a protective device coordination study. This procedure looks at probable and possible values of fault currents within the system and analyzes the impact of those faults upon the operation of circuit protective devices such as fuses and circuit breakers.

IEEE Standard 242 Quotes: "System protection is one of the most essential features of an electrical system and must be considered concurrently with all other essential features. There is too often a tendency to consider system protection after all other design features have been determined and the basic system design established. Such an approach can result in an unsatisfactory system that cannot be adequately protected, except by a disproportionately high expenditure. System protection is so basic to the safety of personnel and the reliability of electrical supply, and can have such a profound influence on the economics of system design, that examining the system protection needs only after all other design features have been determined is a completely unrealistic approach."

Rizza Engineering, Inc. has developed an expertise in the area of such studies and can assist you during the design development phases of your system. Our involvement can help you develop a power system that meets your expectations for protective device coordination. State of the art computational software is utilized in support of these studies that assist in the rapid development of the system one-line diagram.

More than ever, today’s electrical systems are one of the most important part of any facility. Loss of power is usually debilitating at best. For this reason, selective coordination is critical, and required by the NEC for certain installations. The following address Code requirements for selective coordination and other related areas.

The 2011 NEC expanded the mandatory requirements for overcurrent protective device selective coordination to include power circuits supplying critical life-safety loads and national security and public safety power systems. NEC requirements for selective coordination are mandatory for certain electrical systems where maximum reliability of power is critical. The materials included in this section provide insight into the relationship between selective coordination, system reliability and life safety. The reasoning for why selective coordination is mandatory.

It must be stated, neither the NEC nor the IEEE Standards specify a time value requirement to attain selectivity. This leaves the analysis to the discretion of the design engineer to determine the correct point in time to achieve coordination (selectivity).

Coordination Study Methodology

The Protective Device Coordination Study was performed using a computer based software program:

Power Tools for Windows (PTW) by SKM System Analysis, CAPTOR Protective Device Coordination

Module. The systematic Protective Device Coordination Study methodology begins by utilizing the system one-line diagram (developed within PTW for the Short Circuit Study) that defines the electrical characteristics of the power system. Time vs. current coordination drawings that display the time-current curve(s) of one or more of the protective devices to be analyzed are then created. Each of the protective devices is individually modeled based on its specific time-current characteristics and the available three phase symmetrical RMS fault current. The results of the computer generated study are described below.

Locked-rotor motor starting curves, thermal and mechanical damage curves for conductors and transformers, and generator performance curves are plotted along with OCPDs TCC. PowerTools utilizes the latest software tools Captor to generate the TCC for all OCPDs in the system.

February 13, 2012

Adjustable Trip Circuit Breaker Settings

• Overload region (Long Time per Unit) – Sometimes referred to as continuous amperes, this is the long-time trip setting of the overcurrent protective device. This parameter is a percentage of the breakers nominal rating and can typically be set at 20% to 100%. This setting is usually achieved with a thermal overload in a molded-case circuit breaker.

• Long-time delay - This setting allows for inrush from motors to pass without tripping the breaker.

The setting affects the position of the I T slope just below the continuous current setting.

• Short-time pick up - This is typically provided with an adjustment of 5x to 10x. This setting allows downstream overcurrent protection devices to clear faults without tripping upstream devices and can also be adjusted to allow for transformer inrush current.

• Short-time delay and instantaneous override - This setting postpones the short-time pickup, and can be done on a fixed setting or an I T ramp setting. This allows for better coordination between upstream and downstream devices. An instantaneous override can be set at high current to override this function and protect electrical equipment. The I T function of the short time delay can provide better coordination when coordinating a breaker with a fuse.

• Instantaneous - This setting will trip the overcurrent protective device with no intentional delay.

• Ground-fault setting (per Unit) - Percentage of the rating of the breaker for the ground fault setting. Per the National Electrical Code, ground fault cannot exceed 1,200 amps, regardless of breaker size.

• Ground-fault delay - Allows for a time delay before ground-fault pickup. This allows for better selective coordination between multiple levels of ground-fault protection. In addition, the time delay cannot exceed one second (60 cycles) for ground-fault currents of 3,000 amps or greater.

Coordination Study Data

The data generated by the PTW’s CAPTOR Protective Device Coordination Module consists of the following:

• Time Current Curves - Normal

• Time Current Curves - Emergency

• Component Setting Reports

The Time Current Curves illustrate protective device coordination data for the power system under normal operating and normal failing conditions.

The software is programmed to plot the curves such that the right-most point plotted for any of the individual device curves is at the calculated three phase symmetrical RMS fault current at the bus that feeds the device. Regarding fuse-to-fuse coordination, the most accurate and complete way to ensure coordination is to use the manufacturer’s Selectivity Ratio Guide (line-side to load-side).

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9.0 Reports

9.1 Overcurrent Protective Device Coordination Evaluation

PowerTool’s Captor module is used to coordinate the time-current curves associated with the overcurrent protection devices. In this study, there is a maximum of two protective devices needing to be coordinated at any given time. This occurs when a fault happens in any of the feeders tied in with the transformers. Since all these feeders are identical, the settings associated with the respective relays will also be identical. As mentioned earlier, there are guidelines in coordinating these devices. There must be adequate time for the relay to sense the fault, transmit to the breaker, and open the breaker. If this does not occur in the downstream device, then the upstream device must perform this function. It is an industry standard that this coordination time is 0.50 seconds. The Time-Current-Curves for ideal operation are shown below (Figure

3). The Time-Current-Curves for operation under backup power is shown in the appendix.

This evaluation consists of a comparison of the interrupting rating of each of the protective devices to the available short circuit (fault) current (at its location in the power system) under “normal” and “emergency” conditions. The results of this evaluation are presented in the Protective Device Evaluation Report.

Conductor & Bus Protection

Per NEC Article 240.101, feeders rated greater than 600 Volts must have overcurrent protection provided either by a fuse, rated not more that 300% of the feeder ampacity, or by a circuit breaker with a long time trip element set not more than 600% of the feeder ampacity.

Low voltage cables, medium voltage cables and medium voltage cable shields must also be protected from sustained short circuit currents. The upstream protective device must clear the fault prior to reaching the withstand capability of the cable or shield. ANSI/IEEE Standard 242-1986, provides the withstand criteria for this protection.

Therefore, the bus and cable protective devices must be set to provide overcurrent protection per the NEC requirements and to provide withstand protection per the ANSI/IEEE.

Transformer Protection

NEC Table 450.3(a) establishes the maximum permissible settings or ratings of the primary and secondary overcurrent device for transformers rated over 600 Volts. The limits are shown below:

PRIMARY SECONDARY

> 600 VOLTS > 600 VOLTS < 600 V

XFMR % Z CB FUSE CB FUSE CB/FUSE

Z < = 6% 600% 300% 300% 250% 125%

6% < Z < = 10% 400% 300% 250% 225% 125%

The transformer primary protective device must not operate for the normal magnetizing inrush current that occurs when energizing a transformer. Transformer inrush is established at 8x the full load current for a period of 0.1 seconds for transformers less than 2500 kVA. For transformers 2500kVA and greater the inrush point is 10x ~ 12x the full load current for a period of 0.1 second.

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Therefore, the transformer primary and secondary protective devices must be set within the NEC requirements for transformer overload protection, must provide withstand protection per the ANSI/IEEE withstand curve and must allow the normal magnetizing inrush current to flow.

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9.2 Input Data Report

DAPPER Fault Analysis Input Report (English)

VA Loma Linda Healthcare Center - Loma Linda, CA

Project: VA_Loma_Linda_Gen

Coordination Study of Emergency Generator

- Normal Power Source

Utilities

Contribution

From Name

Bus

Name

In/Out

Service

Nominal

Voltage

-------- Contribution Data -------- PU (100 MVA Base)

X PUR PUX/RUnitsDuty

AVAIL MDBD1(X) (X)MDBD POC1 480 Amps 8.00In 28,104

SLG:

3P:

Amps 8.00 10,000,000.00010,000,000.000

Pos:

Zero:0

0.531 4.247

AVAIL MDBD2(X) (X)MDBD POC2 480 Amps 8.00In 28,104

SLG:

3P:

Amps 8.00 10,000,000.00010,000,000.000

Pos:

Zero:0

0.531 4.247

AVAIL MDBL1(X) (X)MDBL POC1 480 Amps 8.00In 28,096

SLG:

3P:

Amps 8.00 10,000,000.00010,000,000.000

Pos:

Zero:0

0.531 4.248

AVAIL MDBL2(X)

(X)MDBL POC2 480 Amps 8.00In 28,096

SLG:

3P:

Amps 8.00 10,000,000.00010,000,000.000

Pos:

Zero:0

0.531 4.248

AVAIL MDBP1(X) (X)MDBP POC1 480 Amps 8.00In 28,146

SLG:

3P:

Amps 8.00 10,000,000.00010,000,000.000

Pos:

Zero:0

0.530 4.240

AVAIL MDBP2(X) (X)MDBP POC2 480 Amps 8.00In 28,146

SLG:

3P:

Amps 8.00 10,000,000.00010,000,000.000

Pos:

Zero:0

0.530 4.240

AVAIL MDBX1(X) (X)MDBX POC1 480 Amps 8.00In 28,154

SLG:

3P:

Amps 8.00 10,000,000.00010,000,000.000

Pos:

Zero:0

0.530 4.239

AVAIL MDBX2(X)

(X)MDBX POC2 480 Amps 8.00In 28,154

SLG:

3P:

Amps 8.00 10,000,000.00010,000,000.000

Pos:

Zero:0

0.530 4.239

Generators

Contribution

From Name

Bus

Name

In/Out

Service

Nominal

Voltage

-------- Contribution Data --------

Base kVA X" X/R

PU (100 MVA Base)

R PU X PU

GEN-E1 480BUS-0005 631.25 20.00 1.19 23.76In

1.19

23.761.19

0.15

0.15

0.15

20.00

20.00 23.76

GEN-E2 480BUS-0004 631.25 20.00 1.19 23.76In

1.19

23.761.19

0.15

0.15

0.15

20.00

20.00 23.76

GEN-E3 480BUS-0003 631.25 20.00 1.19 23.76In

23.761.19

0.15

0.15 20.00

Contribution

From Name

Bus

Name

In/Out

Service

Nominal

Voltage

-------- Contribution Data --------

Base kVA X" X/R

PU (100 MVA Base)

R PU X PU

1.190.15 20.00 23.76

GEN-E4 480BUS-0001 631.25 20.00 1.19 23.76In

1.19

23.761.19

0.15

0.15

0.15

20.00

20.00 23.76

Cables

Cable

Name

From Bus

To Bus

Qty

/Ph

Length

Feet

------ Cable Description ------

Size Cond. Type Duct Type Insul

Per Unit (100 MVA Base)

R pu jX pu

In/Out

Service

2CD POC

2CD BUS 400A

1 3 400 **** Pos:

Zero:

0.2018 0.2087

1.1171

2CD 400A BUS In

1.1996

BusCopper

2CL POC

2CL BUS 400A

1 3 400 **** Pos:

Zero:

0.2018 0.2087

1.1171

2CL 400A BUS In

1.1996

BusCopper

2CP POC

2CP BUS 400A

1 3 400 **** Pos:

Zero:

0.2018 0.2087

1.1171

2CP 400A BUS In

1.1996

BusCopper

2CX POC

2CX BUS 400A

1 3 400 **** Pos:

Zero:

0.2018 0.2087

1.1171

2CX 400A BUS In

1.1996

BusCopper

2ED POC

2ED BUS 200A

1 2 225 **** Pos:

Zero:

0.1965 0.1493

0.7993

2ED 200A BUS In

1.1682

BusCopper

2EL POC

2EL BUS 200A

1 2 225 **** Pos:

Zero:

0.1965 0.1493

0.7993

2EL 200A BUS In

1.1682

BusCopper

2EP POC

2EP BUS 200A

1 2 225 **** Pos:

Zero:

0.1965 0.1493

0.7993

2EP 200A BUS In

1.1682

Cable

Name

From Bus

To Bus

Qty

/Ph

Length

Feet

------ Cable Description ------

Size Cond. Type Duct Type Insul

Per Unit (100 MVA Base)

R pu jX pu

In/Out

Service

2EX POC

2EX BUS 200A

1 2 225 **** Pos:

Zero:

0.1965 0.1493

0.7993

2EX 200A BUS In

1.1682

4CD POC

4CD BUS 600A

1 3 600 **** Pos:

Zero:

0.0263 0.0221

0.1185

4CD 600A BUS In

0.1564

BusCopper

BUS-0116

4CD POC

2 21 350 PVC Pos:

Zero:

0.1682 0.1659

0.4084

4CD FDR 6004 In

0.5299

MagneticCopper

4CL POC

4CL BUS 600A

1 3 600 **** Pos:

Zero:

0.0263 0.0221

0.1185

4CL 600A BUS In

0.1564

BusCopper

BUS-0088

4CL POC

2 14 350 PVC Pos:

Zero:

0.1107 0.1438

0.3542

4CL FDR 6004 In

0.3489

MagneticCopper

4CP POC

4CP BUS 600A

1 3 600 **** Pos:

Zero:

0.0263 0.0221

0.1185

4CP 600A BUS In

0.1564

BusCopper

BUS-0087

4CP POC

2 21 350 PVC Pos:

Zero:

0.1682 0.2184

0.5379

4CP FDR 6004 In

0.5299

MagneticCopper

4CX POC

4CX BUS 600A

1 3 600 **** Pos:

Zero:

0.0263 0.0221

0.1185

4CX 600A BUS In

0.1564

BusCopper

BUS-0115

4CX POC

2 14 350 PVC Pos:

Zero:

0.1107 0.1093

0.2689

4CX FDR 6004 In

0.3489

4ED POC

4ED BUS 200A

1 2 225 **** Pos:

Zero:

0.0369 0.0280

0.1501

4ED 200A BUS In

0.2194

From Bus

To Bus

Qty

/Ph

Length

Feet

------ Cable Description ------

Size Cond. Type Duct Type Insul

Per Unit (100 MVA Base)

R pu jX pu

In/Out

Service

4EL POC

4EL BUS 200A

1 2 225 **** Pos:

Zero:

0.0369 0.0280

0.1501

4EL 200A BUS In

0.2194

BusCopper

4EP POC

4EP BUS 200A

1 2 225 **** Pos:

Zero:

0.0369 0.0280

0.1501

4EP 200A BUS In

0.2194

BusCopper

4EX POC

4EX BUS 200A

1 2 225 **** Pos:

Zero:

0.0369 0.0280

0.1501

4EX 200A BUS In

0.2194

1 48 1/0 PVC Pos:

Zero:

2.6667 0.8625

2.1229

ATSEL FDR 1506 In

8.4042

MagneticCopper

BUS-0005

SBEP BUS 4000A

3 25 400 PVC Pos:

Zero:

0.1237 0.1418

0.3606

E1-10004 In

0.1964

Non-MagneticCopper

BUS-0004

SBEP BUS 4000A

3 43 400 PVC Pos:

Zero:

0.2128 0.2439

0.6202

E2-10004 In

0.3378

Non-MagneticCopper

BUS-0003

SBEP BUS 4000A

3 60 400 PVC Pos:

Zero:

0.2969 0.3403

0.8655

E3-10004 In

0.4714

Non-MagneticCopper

BUS-0001

SBEP BUS 4000A

3 76 400 PVC Pos:

Zero:

0.3760 0.4310

1.0962

E4-10004 In

0.5970

Non-MagneticCopper

BUS-0109

2CD POC

1 14 500 PVC Pos:

Zero:

0.9718 1.5403

3.7912

F-2CD 4004 In

3.0607

MagneticCopper

2CD BUS 400A

2CX1 BUS0

1 66 2 PVC Pos:

Zero:

30.8155 8.9243

21.9675

F-2CD1 1004 In

97.1145

From Bus

To Bus

Qty

/Ph

Length

Feet

------ Cable Description ------

Size Cond. Type Duct Type Insul

Per Unit (100 MVA Base)

R pu jX pu

In/Out

Service

2CD BUS 400A

2CD2 BUS

1 66 4 PVC Pos:

Zero:

49.1917 9.6851

23.8450

F-2CD2 704 In

155.0229

2CD BUS 400A

2CD3 BUS

1 66 2 PVC Pos:

Zero:

30.9555 8.9648

22.0673

F-2CD3 1004 In

97.5559

MagneticCopper

2CD BUS 400A

2CD4A BUS

1 66 1/0 PVC Pos:

Zero:

19.6154 8.2752

20.3663

F-2CD4A 1504 In

61.8191

MagneticCopper

2CD4A BUS

2CD4B BUS

1 15 4 PVC Pos:

Zero:

11.0552 2.1766

5.3588

F-2CD4B 704 In

34.8392

MagneticCopper

2CD4A BUS

2CD4C BUS

1 17 4 PVC Pos:

Zero:

12.4649 2.4541

6.0422

F-2CD4C 704 In

39.2818

2CP BUS 400A

2CG1 BUS

1 936 4 PVC Pos:

Zero:

694.4712 109.4712

278.4375

F-2CG1 704 In

1,073.0769

Non-MagneticCopper

BUS-0100

2CL POC

1 15 500 PVC Pos:

Zero:

0.9853 1.5618

3.8442

F-2CL 4004 In

3.1035

MagneticCopper

2CL BUS 400A

2CL1 BUS

1 53 2 PVC Pos:

Zero:

24.5123 7.0989

17.4741

F-2CL1 1004 In

77.2501

MagneticCopper

2CL BUS 400A

2CL2 BUS

1 53 4 PVC Pos:

Zero:

39.1753 7.7130

18.9896

F-2CL2 704 In

123.4571

2CL BUS 400A

2CL3 BUS

1 53 4 PVC Pos:

Zero:

39.1753 7.7130

18.9896

F-2CL3 704 In

123.4571

From Bus

To Bus

Qty

/Ph

Length

Feet

------ Cable Description ------

Size Cond. Type Duct Type Insul

Per Unit (100 MVA Base)

R pu jX pu

In/Out

Service

2CL BUS 400A

2CL4A BUS

1 53 3/0 PVC Pos:

Zero:

9.8243 6.3339

15.5969

F-2CL4A 2004 In

30.9619

MagneticCopper

2CL4A BUS

2CL4B BUS

1 18 4 PVC Pos:

Zero:

13.4294 2.6440

6.5097

F-2CL4B 704 In

42.3215

MagneticCopper

2CL4A BUS

2CL4C BUS

1 18 4 PVC Pos:

Zero:

13.5778 2.6733

6.5816

F-2CL4C 704 In

42.7891

BUS-0401

2CP POC

1 20 500 PVC Pos:

Zero:

1.3387 2.1219

5.2228

F-2CP 4004 In

4.2165

MagneticCopper

2CP BUS 400A

2CP1 BUS

1 29 4 PVC Pos:

Zero:

21.7393 4.2801

10.5378

F-2CP1 704 In

68.5093

MagneticCopper

2CP BUS 400A

2CP2 BUS

1 29 4 PVC Pos:

Zero:

21.5167 4.2363

10.4299

F-2CP2 704 In

67.8079

MagneticCopper

2CP BUS 400A

2CP3 BUS

1 29 4 PVC Pos:

Zero:

21.5167 4.2363

10.4299

F-2CP3 704 In

67.8079

2CP BUS 400A

2CP4A BUS

1 29 1 PVC Pos:

Zero:

10.7249 3.8207

9.4044

F-2CP4A 1254 In

33.7967

MagneticCopper

2CP4A BUS

2CP4B BUS

1 15 4 PVC Pos:

Zero:

11.0552 2.1766

5.3588

F-2CP4B 704 In

34.8392

MagneticCopper

BUS-0108

2CX POC

1 15 500 PVC Pos:

Zero:

0.9853 1.5618

3.8442

F-2CX 4004 In

3.1035

From Bus

To Bus

Qty

/Ph

Length

Feet

------ Cable Description ------

Size Cond. Type Duct Type Insul

Per Unit (100 MVA Base)

R pu jX pu

In/Out

Service

2CX BUS 400A

2CX1 BUS

1 49 2 PVC Pos:

Zero:

22.6447 6.5580

16.1428

F-2CX1 1004 In

71.3644

BUS-0181

2CX1B BUS

1 10 1/0 PVC Pos:

Zero:

2.9586 1.2482

3.0718

F-2CX1B 1504 In

9.3242

MagneticCopper

2CX BUS 400A

2CX2A BUS

1 49 1/0 PVC Pos:

Zero:

14.4379 6.0910

14.9906

F-2CX2A 1504 In

45.5019

MagneticCopper

2CX2A BUS

BUS-0081

1 17 4 PVC Pos:

Zero:

12.2423 2.4103

5.9343

F-2CX2B 704 In

38.5803

MagneticCopper

2CX BUS 400A

2CX3A BUS

1 49 1 PVC Pos:

Zero:

18.0473 6.4294

15.8253

F-2CX3A 1254 In

56.8717

2CX3A BUS

2CX3B BUS

1 17 4 PVC Pos:

Zero:

12.2423 2.4103

5.9343

F-2CX3B 704 In

38.5803

MagneticCopper

2CX BUS 400A

2CX4A BUS

1 49 2 PVC Pos:

Zero:

22.7848 6.5986

16.2426

F-2CX4A 1004 In

71.8058

MagneticCopper

2CX4A BUS

2CX4B BUS

1 17 4 PVC Pos:

Zero:

12.2423 2.4103

5.9343

F-2CX4B 704 In

38.5803

MagneticCopper

BUS-0102

2ED POC

1 15 1/0 PVC Pos:

Zero:

4.3787 1.8473

4.5463

F-2ED 1504 In

13.7997

2ED BUS 200A

2ED1 BUS

1 59 4 PVC Pos:

Zero:

43.4786 8.5603

21.0756

F-2ED1 704 In

137.0187

From Bus

To Bus

Qty

/Ph

Length

Feet

------ Cable Description ------

Size Cond. Type Duct Type Insul

Per Unit (100 MVA Base)

R pu jX pu

In/Out

Service

2ED BUS 200A

2ED2 BUS

1 59 4 PVC Pos:

Zero:

43.7754 8.6187

21.2195

F-2ED2 704 In

137.9540

MagneticCopper

2ED BUS 200A

2ED3 BUS

1 59 4 PVC Pos:

Zero:

43.7754 8.6187

21.2195

F-2ED3 704 In

137.9540

MagneticCopper

2ED BUS 200A

2ED4 BUS

1 59 1 PVC Pos:

Zero:

21.8195 7.7732

19.1330

F-2ED4 704 In

68.7588

BUS-0101

2EL POC

1 15 1/0 PVC Pos:

Zero:

4.4379 1.8722

4.6078

F-2EL 1504 In

13.9862

MagneticCopper

2EL BUS 200A

2EL1 BUS

1 52 4 PVC Pos:

Zero:

38.4333 7.5669

18.6300

F-2EL1 704 In

121.1189

MagneticCopper

2EL BUS 200A

2EL2 BUS

1 52 4 PVC Pos:

Zero:

38.5817 7.5962

18.7019

F-2EL2 704 In

121.5865

MagneticCopper

2EL BUS 200A

2EL3 BUS

1 52 4 PVC Pos:

Zero:

38.5817 7.5962

18.7019

F-2EL3 704 In

121.5865

2EL BUS 200A

2EL4 BUS

1 52 4 PVC Pos:

Zero:

38.5817 7.5962

18.7019

F-2EL4 704 In

121.5865

MagneticCopper

BUS-0098

2EP POC

1 14 1/0 PVC Pos:

Zero:

4.1420 1.7474

4.3006

F-2EP 1504 In

13.0538

MagneticCopper

2EP BUS 200A

2EP1 BUS

1 37 4 PVC Pos:

Zero:

27.2298 5.3611

13.1992

F-2EP1 704 In

85.8120

From Bus

To Bus

Qty

/Ph

Length

Feet

------ Cable Description ------

Size Cond. Type Duct Type Insul

Per Unit (100 MVA Base)

R pu jX pu

In/Out

Service

2EP BUS 200A

2EP2 BUS

1 36 4 PVC Pos:

Zero:

26.9330 5.3027

13.0554

F-2EP2 704 In

84.8768

2EP BUS 200A

2EP3 BUS

1 36 4 PVC Pos:

Zero:

26.9330 5.3027

13.0554

F-2EP3 704 In

84.8768

MagneticCopper

2EP BUS 200A

2EP4 BUS

1 36 4 PVC Pos:

Zero:

26.9330 5.3027

13.0554

F-2EP4 704 In

84.8768

MagneticCopper

BUS-0099

2EX POC

1 15 1/0 PVC Pos:

Zero:

4.4379 1.8722

4.6078

F-2EX 1504 In

13.9862

MagneticCopper

2EX BUS 200A

2EX1 BUS

1 49 4 PVC Pos:

Zero:

36.4301 7.1725

17.6589

F-2EX1 704 In

114.8058

BUS-0412

2EX1B BUS

1 17 6 PVC Pos:

Zero:

19.8040 2.1280

5.4131

F-2EX1B 504 In

31.5427

Non-MagneticCopper

2EX BUS 200A

2EX2 BUS

1 50 4 PVC Pos:

Zero:

36.7268 7.2310

17.8028

F-2EX2 704 In

115.7410

MagneticCopper

2EX BUS 200A

2EX3 BUS

1 50 4 PVC Pos:

Zero:

36.7268 7.2310

17.8028

F-2EX3 704 In

115.7410

MagneticCopper

2EX BUS 200A

2EX4 BUS

1 50 1 PVC Pos:

Zero:

18.3062 6.5216

16.0523

F-2EX4 704 In

57.6875

4EX BUS 200A

4EX1B BUS

1 109 4 PVC Pos:

Zero:

15.1583 2.9844

7.3478

F-43X1B 704 In

47.7700

From Bus

To Bus

Qty

/Ph

Length

Feet

------ Cable Description ------

Size Cond. Type Duct Type Insul

Per Unit (100 MVA Base)

R pu jX pu

In/Out

Service

4CD BUS 600A

T-CD PRI

1 48 3/0 PVC Pos:

Zero:

1.6771 1.0813

2.6625

F-4CD0 2003 In

5.2854

MagneticCopper

1 48 3/0 PVC Pos:

Zero:

1.6771 1.0812

2.6625

F-4CD0 2005 In

5.2854

MagneticCopper

4CD BUS 600A

4CD1 BUS

1 59 4 PVC Pos:

Zero:

8.1504 1.6047

3.9508

F-4CD1 704 In

25.6852

4CD BUS 600A

4CD2 BUS

1 53 4 PVC Pos:

Zero:

7.3563 1.4483

3.5658

F-4CD2 704 In

23.1825

MagneticCopper

4CD BUS 600A

4CD3 BUS

1 59 4 PVC Pos:

Zero:

8.1922 1.6129

3.9710

F-4CD3 704 In

25.8169

MagneticCopper

4CD BUS 600A

4CD4 BUS

1 59 4 PVC Pos:

Zero:

8.1922 1.6129

3.9710

F-4CD4 704 In

25.8169

MagneticCopper

4CL BUS 600A

T-CL PRI

1 51 3/0 PVC Pos:

Zero:

1.7819 1.1488

2.8289

F-4CL0 2003 In

5.6158

4CL BUS 600A

4CL1 BUS

1 71 4 PVC Pos:

Zero:

9.8919 1.9476

4.7950

F-4CL1 704 In

31.1734

MagneticCopper

4CL BUS 600A

4CL2 BUS

1 72 4 PVC Pos:

Zero:

9.9616 1.9613

4.8287

F-4CL2 704 In

31.3930

MagneticCopper

4CL BUS 600A

4CL3 BUS

1 72 1 PVC Pos:

Zero:

4.9653 1.7689

4.3539

F-4CL3 704 In

15.6468

From Bus

To Bus

Qty

/Ph

Length

Feet

------ Cable Description ------

Size Cond. Type Duct Type Insul

Per Unit (100 MVA Base)

R pu jX pu

In/Out

Service

4CL BUS 600A

4CL4 BUS

1 72 4 PVC Pos:

Zero:

9.9616 1.9613

4.8287

F-4CL4 704 In

31.3930

4CP BUS 600A

T-CP PRI

1 51 3/0 PVC Pos:

Zero:

1.7819 1.1488

2.8289

F-4CP0 2003 In

5.6158

MagneticCopper

4CP BUS 600A

4CP1 BUS

1 62 4 PVC Pos:

Zero:

8.6102 1.6952

4.1736

F-4CP1 704 In

27.1341

MagneticCopper

4CP BUS 600A

4CP2 BUS

1 62 4 PVC Pos:

Zero:

8.6380 1.7007

4.1872

F-4CP2 704 In

27.2219

MagneticCopper

4CP BUS 600A

4CP3 BUS

1 62 1 PVC Pos:

Zero:

4.3125 1.5363

3.7815

F-4CP3 1254 In

13.5898

4CP BUS 600A

4CP4 BUS

1 62 4 PVC Pos:

Zero:

8.6520 1.7034

4.1939

F-4CP4 704 In

27.2658

MagneticCopper

4CX BUS 600A

T-CX PRI

1 48 3/0 PVC Pos:

Zero:

1.6771 1.0813

2.6625

F-4CX0 2003 In

5.2854

MagneticCopper

4CX BUS 600A

4CX1 BUS

1 54 4 PVC Pos:

Zero:

7.4816 1.4730

3.6266

F-4CX1 704 In

23.5777

MagneticCopper

4CX BUS 600A

4CX1B BUS

1 109 4 PVC Pos:

Zero:

15.2280 2.9982

7.3815

F-4CX1B 704 In

47.9895

4CX BUS 600A

4CX2 BUS

1 54 4 PVC Pos:

Zero:

7.5234 1.4813

3.6469

F-4CX2 704 In

23.7094

From Bus

To Bus

Qty

/Ph

Length

Feet

------ Cable Description ------

Size Cond. Type Duct Type Insul

Per Unit (100 MVA Base)

R pu jX pu

In/Out

Service

4CX BUS 600A

4CX3 BUS

1 54 4 PVC Pos:

Zero:

7.5234 1.4813

3.6469

F-4CX3 704 In

23.7094

MagneticCopper

4CX BUS 600A

4CX4 BUS

1 54 4 PVC Pos:

Zero:

7.5234 1.4813

3.6469

F-4CX4 704 In

23.7094

MagneticCopper

BUS-0176

4ED POC

1 14 1/0 PVC Pos:

Zero:

0.7500 0.3164

0.7787

F-4ED 1504 In

2.3637

4ED BUS 200A

T-ED PRI

1 55 4 PVC Pos:

Zero:

7.6628 1.5087

3.7144

F-4ED0 703 In

24.1484

MagneticCopper

4ED BUS 200A

4ED1 BUS

1 62 4 PVC Pos:

Zero:

8.6380 1.7007

4.1872

F-4ED1 704 In

27.2219

MagneticCopper

4ED BUS 200A

4ED2 BUS

1 63 4 PVC Pos:

Zero:

8.7077 1.7144

4.2209

F-4ED2 704 In

27.4414

MagneticCopper

4ED BUS 200A

4ED3 BUS

1 63 4 PVC Pos:

Zero:

8.7077 1.7144

4.2209

F-4ED3 704 In

27.4414

4ED BUS 200A

4ED4 BUS

1 63 4 PVC Pos:

Zero:

8.7077 1.7144

4.2209

F-4ED4 704 In

27.4414

MagneticCopper

BUS-0410

4EL POC

1 14 1/0 PVC Pos:

Zero:

0.7441 0.2531

0.6439

F-4EL 1504 In

1.1830

Non-MagneticCopper

4EL BUS 200A

T-EL PRI

1 54 4 PVC Pos:

Zero:

7.5234 1.4813

3.6469

F-4EL 703 In

23.7094

From Bus

To Bus

Qty

/Ph

Length

Feet

------ Cable Description ------

Size Cond. Type Duct Type Insul

Per Unit (100 MVA Base)

R pu jX pu

In/Out

Service

4EL BUS 200A

4EL1 BUS

1 68 4 PVC Pos:

Zero:

9.4043 1.8516

4.5586

F-4EL1 70A In

29.6367

4EL BUS 200A

4EL2 BUS

1 68 4 PVC Pos:

Zero:

9.4600 1.8625

4.5856

F-4EL2 704 In

29.8123

MagneticCopper

4EL BUS 200A

4EL3 BUS

1 68 1 PVC Pos:

Zero:

4.7153 1.6798

4.1347

F-4EL3 704 In

14.8590

MagneticCopper

4EL BUS 200A

4EL4 BUS

1 68 4 PVC Pos:

Zero:

9.4600 1.8625

4.5856

F-4EL4 704 In

29.8123

MagneticCopper

BUS-0173

4EP POC

1 14 1/0 PVC Pos:

Zero:

0.7441 0.2531

0.6439

F-4EP 1504 In

1.1830

Non-MagneticCopper

4EP BUS 200A

T-EP PRI

1 54 4 PVC Pos:

Zero:

7.5234 1.4813

3.6469

F-4EP 703 In

23.7094

MagneticCopper

4EP BUS 200A

4EP1 BUS

1 66 4 PVC Pos:

Zero:

9.1257 1.7967

4.4235

F-4EP1 70A In

28.7586

MagneticCopper

4EP BUS 200A

4EP2 BUS

1 66 4 PVC Pos:

Zero:

9.1535 1.8022

4.4370

F-4EP2 704 In

28.8464

MagneticCopper

4EP BUS 200A

4EP3 BUS

1 66 1 PVC Pos:

Zero:

4.5625 1.6254

4.0007

F-4EP3 704 In

14.3776

4EP BUS…