Project P-904 - 4CD

Project P-904 Electrical Distribution System

Condition Assessments for

Diablo Valley College

Task 2 & 3 - Final Report

Volume II of II

Oakland, California

December 2015

YEI Engineers, Inc. • Edgewater Park Plaza • 7700 Edgewater Dr., Suite 128 • Oakland, CA 94621

Phone (510) 383-1050 • Email: [email protected] Branch Offices: San Francisco and San Jose, California

YEI ENGINEERS, INC. Electrical • Mechanical

December 31, 2015 Contra Costa Community College District 500 Court Street Martinez, CA 94553 Attention: PJ Roach, Facilities Project Manager RE: P-904 Electrical Distribution System Condition Assessment Task 2 & 3 Report for Diablo Valley College (Final Report) Volume ll of ll

Dear Mr. Roach, YEI Engineers, Inc. is pleased to submit the final report for referenced project. Enclosed are four hardcopies and CD. This final report is Volume Il of II for P-904 Electrical Distribution System Condition Assessment Study project which includes result of the power system analysis and condition assessment with project recommendation for equipment replacement to improve reliability and operation. Under a separate attachment, warning labels were printed out from the Arc Flash Study based on the existing electrical system at time of survey. It is our understanding that Campus B&G personnel will affix labels to the appropriate equipment. The Task 1 report (Volume l of ll) consists of gathering record drawings, manhole survey, equipment survey, ultrasound and infrared scanning, updating electrical single line diagram and site plan. Documenting the survey information and identifying deficiencies were also included. We appreciate the opportunity to prepare this report and will be glad to respond to any questions pertaining to this report in the future. Sincerely, YEI Engineers, Inc. Douglas Yung, P.E. Principal, Electrical Engineer

mailto:[email protected]


December 2015

CONTRA COSTA COMMUNITY COLLEGE DISTRICT

P-904 ELECTRICAL DISTRIBUTION SYSTEM CONDITION ASSESSMENT

FOR DIABLO VALLEY COLLEGE

Table of Contents

Sections 1.0 Executive Summary

2.0 Power System Study Analysis

3.0 Electrical Equipment Preventative Maintenance Schedule

4.0 Electrical Distribution System Replacement and Improvement Analysis

Appendices A. Drawing E-1: Campus Electrical Distribution System One Line Diagram

Drawing E-2: Campus Electrical Site Plan

B. Existing 4.16kV Feeder Tables

C. Electrical Equipment Preventative Maintenance Schedule Tables

• Tables From NETA Standard

• Breakers and Switches

• Transformers

• Main Switchboards

D. SKM Short Circuit and Load Flow – One Line Diagram

E. SKM Time Current Curve (TCC)

• TCC-PG&E Phase-Existing

• TCC-PG&E Phase-Adjust 4.16kV Breaker

• TCC-Main Switchgear Phase-Existing

• TCC-F57-Transformer T13-1500kVA



December 2015

Sections


December 2015 1

SECTION 1.0

EXECUTIVE SUMMARY

The District selected YEI Engineers, Inc, Oakland CA to perform a comprehensive Electrical Distribution System Condition Assessment Study for its three main campuses: Diablo Valley College, Contra Costa College and Los Medanos College. The condition assessment begins at PG&E service meter through the campus electrical distribution system to the building main switchboards which are connected to secondary sides of the corresponding 4.16kV stepped down transformers. The study consists of Task 1, 2 and 3 reports for each campus. Task 1 report included field equipment survey, manhole survey, limited load measurements, limited infrared and ultrasound scanning. Task 2 included of power system study and analysis. Task 3 consists of preparing the report to address maintenance of campus electrical distribution system, correct deficiencies and/or replace equipment and to prioritize recommended projects as Priority 1, 2, 3 and 4 as defined below. The following is a summary of Tasks 2 and 3 highlights for Diablo Valley College (DVC): Power System Study

A. The result of the short circuit study indicated that the equipment interrupting ratings of the existing electrical distribution system equipment such as switchgears, switches, breakers and main switchboard bus and breakers were not exceeded.

B. The result of the load flow study indicated that the buses and conductors are within

acceptable percent voltage drop of 5% and 3% respectively.

C. The feeder ampacity (4.16kV Feeders No. 1 – 8) in accordance with the basic rule of NEC 250-3.B1 requires the feeder ampacity (for medium voltage cables) should equal to the sum of the transformer rated full load current. Currently, the existing feeder ampacity does not equal the sum of total connected transformers. However, NEC 215-3-B3 states that if the installation was supervised during engineering design and have a qualified maintenance staff, then feeder ampacity can be determined by the engineering design. In additional, the load measurements appears to indicate that the building transformers connected to 4.16kV feeders are less than 50% loaded during peak condition which supports NEC 215-3-B3.

D. It is noted that Feeders 2-4 and 5-7 have a combination of two different wire sizes AWG

2/0 and 350MCM. When these feeders operate as a loop system the maximum load current will be limited to the smallest cable size.


December 2015 2

E. The feeder loading (connected transformers) are imbalanced. For example, Feeder 5-7 has total connected transformer loads of 5,837.5kVA while Feeder 1-3 only has a total of 1,150kVA. Industry practice is to have all feeders share equal loading where feasible and practical.

F. The load flow and feeder studies indicate that campus should not operate in a loop

system because of the number of connected transformers and NEC feeder ampacity requirements are not in compliance. The campus will need to redistribute some transformers in order to meet the NEC feeder ampacity requirement. For example, some of the transformers connected on Feeders 7 and 8 need to be reconnected to other feeders.

G. The protective device coordination study indicates that the 21kV breaker phase

overcurrent relay needs to be adjusted to trip after the 4.16kV main breaker to, improve coordination.

H. Due to larger building and hence larger transformer ratings, any transformers rated

above 750kVA will not be able to provide selective coordination with the upstream feeder breakers. The result is that if there is a transformer fault, then the upstream feeder will trip instead of the transformer fuse, thus interrupting power to all the transformers on the same feeder.

I. The result of the arc flash study indicated the Physical Science Building’s main

switchboard should be completely de-energized before any maintenance. There is no appropriate available Personal Protective Equipment (PPE) to work on this equipment while energized.

Preventive Maintenance Schedule

A. Discussion with campus Building, Grounds staff and personnel, indicated that there was no formal preventive maintenance schedule for the campus electrical distribution system equipment i.e. main switchgear, switches, transformers and main switchboards. Since the campus did not have any maintenance practices and records, YEI decided to assist the District in developing an action plan to perform routine and periodic preventive maintenance for the campus electrical distribution system equipment.

B. The basis for a campus preventive maintenance was developed using publications from InterNational Electrical Testing Association (NETA) “Standard for Maintenance Testing Specifications for Electrical Power Equipment and Systems” and “Frequency of Maintenance Test.” In essence, the older equipment in use, the frequency of maintenance increases with time. The preventive maintenance schedule specific for this campus is described in Appendix C.


December 2015 3

Electrical Distribution System Deficiencies The deficiencies are assigned to the following priority system defined as: Priority 1A: The electrical distribution system equipment observed during the limited survey has code violations or other conditions related to life/fire safety requiring immediate attention. It is recommended that the District take immediate action to further investigate and correct this condition. Note: Based on the limited survey and observations, there are no deficiencies in this classification.

Priority 1B: The electrical distribution system equipment noted has conditions that may lead to equipment failure in the near term. It is recommended that the District, within three months of the final report, have the condition investigated by a qualified and certified Equipment Electrician to identify the cause of the test result and to make recommendations to repair or replace. No action may lead to further deterioration of material and eventual failure.

Priority 1C: Due to the physical condition of the observed materials, equipment, and related components during limited survey, it is recommended that the District, within six months of the final report, further investigate, test and make recommended repairs and/or replacement. No action may lead to further deterioration of material and eventual failure.

Priority 2: Correction of the electrical distribution system equipment which, if left uncorrected, could result in accelerated deterioration of the system in question and significantly increases the cost to correct. Such physical condition requires corrective action within 12-18 months.

Priority 3: The physical condition of the electrical distribution system equipment observed during limited survey consists of either moderate or on-going deterioration, and should be corrected within 24-36 months to reduce the possibility of potential downtime and higher repair cost if deferred further.

Priority 4: Other physical condition of the electrical distribution equipment observed during limited survey is of a lesser nature, including items of deferred maintenance, and/or items that will reduce normally expected useful life of the component or system.

Not Applicable (NA): The equipment was installed in the last 5 years and relatively new hence has a large part of useful life remaining.

The deficiencies are described below by equipment and/or system for the campus electrical distribution system.

A. 4.16kV Main Switchgear has been operation for over 40+ years and hence exceeded its useful life. If routine maintenance and inspection are not adhered to, a major failure of this equipment will interrupt power to the entire campus for weeks and months. This equipment is critical to the campus electrical system and should be eventually be


December 2015 4

replaced due to its age. Continuing the use of this equipment will require frequent maintenance to minimize chance of equipment failure. Estimated Construction Cost is $850K to replace the switchgear including new concrete pad, fencing, grounding, conduits and other site work (Priority 2).

B. It is recommended to ring out all of the 4.16kV cables and update the single line diagram and manhole drawings to ensure the connections are correct. The spare conduits should be tested to ensure continuity from manhole to manhole. Corrosion resistant cable tags with pertinent data should be provided. Fireproofing tape should be applied to cables in all manholes. Estimated Cost: $ 125,000 (Priority 2).

C. Stadium Lighting Feeder: Existing pull boxes are too small for cables and most of the

lighting control equipment is old. Recommend redesigning the stadium electrical distribution system to be more efficient and to provide new feeder cable fuse protection and primary feeder selective system. Estimated Construction Cost for distribution system is: $650,000 (Priority 3).

D. Switches – As indicated in Task 1 Report, the outdoor padmounted switches have

various deficiency issues such as oil leaks, corrosion, etc. that are Priority 1C (for Switch 2-1) and the remaining 5 switches are Priority 2. Estimated Construction Cost is $570,000 total (Priority 1C, 2 and 3).

E. Manholes 1, 2, 2-4, 3, 3-1, Vault 1 (by T18) and 9-2 may have structural issues and

should be investigated by Structural Engineer and repair recommendation. Estimated Investigation Cost: $20,000 (Priority 2).

F. Transformers – There are over 35 transformers in the campus and many have

exceeded its useful life with an array of various deficiencies. The highest priority transformer replacement are as follow:

• Transformer 10A (Learning Center) – Priority 1B • Transformer 14 (Art) – Priority 1C

The remaining transformers recommended for replacement have priority 2 and above.. Estimated Construction Cost for all Transformer Replacement: $805,000.

G. Main Switchboards – For every transformer, there is a main switchboard. As with the

transformers, they are in various deficiencies such as age, undersized, oversized, etc. The priorities vary from 2, 3 and 4 and their costs are as follows:

• Priority 2 (Performing Arts) - $100,000 • Priority 3 - $430,000 • Priority 4 - $441,500


December 2015 5

Electrical Distribution System Improvement and Reliability

A. Redistribution of the transformers and upgrade feeder capacity. It is recommended to reconnect some transformers to other feeders in order to evenly balance the loads for all the feeders. All the feeders should be increased to 350MCM and the junction nodes should be replaced with 600A rating. Install new ductbank between MH2-10 and 9-12 so that the east side of the campus is served by one set of feeders. Further engineering study is needed to determine available options, cost impacts and interface with other utility projects. Estimated Construction Cost is $2.5 – 3.5 Million, Priority 2.

B. Provide additional 4.16kV breakers in the new 4.16kV main switchgear so that 1 or 2 large transformer sizes are connected to dedicated feeder breakers.

C. To improve load distribution and system efficiency, reconnect Photovoltaic system

directly to the 4.16kV Feeders i.e. No. 2 & 4 and 6 & 8 so that the feeders will be less loaded.

D. It is recommended that further engineering evaluation, constructability and preliminary

engineering be performed to combine the above improvement recommendations and integrate future projects i.e. replacement of Art, Counseling, Science Center and Faculty Offices, etc.

E. It is recommended that the warning labels printed out from the arc flash study to be

affixed to the designated equipment. For the final report, warning labels will be printed for the District and Campus to affixed to the appropriate equipment. The arc flash study and warning labels represent existing condition at time of survey. NEC requires that arc flash study be rerun if any of the distribution equipment and protective devices is changed to confirm that the PPE levels have not changed from previous condition. Also, the NEC code requires that arc flash study be rerun every 5 years. Although not part of P-904 study, arc flash study for each building’s electrical system from the main switchboard to the downstream panels should also be performed.

F. For a complete summary of deficiencies and recommendations for electrical distribution

system improvement, refer to Section 4.


December 2015


F. Arc Flash Evaluation NFPA Table


December 2015 6

SECTION 2.0

POWER SYSTEM STUDY ANALYSIS

1. General:

The power system study and analysis performed consists of the following:

• Short Circuit Study – The purpose of the short circuit study is to determine the available fault current at the campus main switchgear, transformer primary and secondary buses and building main switchboards. The short circuit study was performed on the existing campus electrical distribution system as shown on Drawing E1 and E2 in Appendix A. The fault values from the calculation are then compared to the equipment short circuit rating.

• Load Flow Study – The purpose of the load flow study was to determine the voltage drops and current flow in conductors and transformers under peak demand condition. Any location where the current exceeded the conductor or transformer full load ratings and where the voltage drop was found to be greater than 5% for buses and 3% for conductors are highlighted in this study.

• Protective Device Coordination Study – The purpose of the coordination study is to determine ratings and settings for protective devices such as relays and fuses to achieve selectivity coordination. Selectivity coordination is achieved when the protective device nearest to the fault operates first thus maintaining power flow to the upstream equipment. Selecting settings is not an exact engineering but partially an art. Engineering judgment, personal experience and operation conditions also factor into selecting a relay settings. A setting will be determine based on Industrial standard, practice and regulation to increase protection and reduce the number of circuits that will be de-energize due to a fault.

• Arc Flash Study – The purpose of Arc-Flash study is to identify the equipment that could cause an arc flash as well as the degree of hazard involved. The result of the study will provide the degree of hazard (incident energy levels) that will provide the required classification of personal protective equipment (PPE) to wear when exposed to that electrical equipment.

• NFPA 70E states that an arc flash analysis is not required if the circuit is rated 240V or less and is supplied by a single transformer rated less than 125kVA. Since this study limits are at the building’s main switchboards, it is recommended that arc flash analysis be performed downstream from the building main switchboards at a later date. This will require additional field investigation and development of building riser


December 2015 7

diagrams with transformers, wiring, panels and protective devices that are downstream from the building’s main switchboards.

• SKM Power Tools software and related modules was used to perform the power system study. The study starts at the utility main service and downstream to the 480V or 208V main switchboard bus.

• Equipment data needed for the SKM Power Tools were obtained from Equipment Tables indicated in Task 1 Appendix C.

• Building Transformer primary fuses: Typical manufacturer and NEC with industry standard rated fuse sizes were assumed. Actual fuse sizes and ratings cannot be obtained for coordination device study due to Inaccessibility and energized equipment.

• Peak demand load of 4,010kW at 80% power factor was condition used in the load flow study.

• The existing campus electrical distribution system configuration for the power system studies are as follows:

• Feeders 1 – 3 (Breaker F13) and Feeders 5 – 7 (Breaker F57) are operating in radial system.

• Feeders 2 – 4 (Breaker F24) and Feeders 6 – 8 (Breaker F68) are operating in loop or ring bus system.

2. Short Circuit Study: The utility available fault current furnished by PG&E at 21kV Point of Common Coupling (PCC) is as follows:

• Three-phase Asymmetrical = 3,509 Amps • Three-phase Symmetrical = 3,118 Amps • Single-phase Asymmetrical = 1,992 Amps • Single-phase Symmetrical = 1,795 Amps

A second source of available fault current is from campus Photovoltaic System installed on the parking lot canopies. The maximum fault current per phase was obtained from the manufacturer of the Satcon Power Systems Photovoltaic Inverter equipment. The result of the short circuit study indicates that the existing equipment ratings (shown on the single line diagram) can withstand the calculated fault currents. Also, the fault


December 2015 8

contribution from the Photovoltaic System is not significant as compared to PG&E. The result of the complete Short Circuit study is shown in Appendix D.

3. Load Flow Study:

The result of the complete load flow study is shown in SKM Load Flow One Line Diagram, Appendix D and the highlights are as follows:

A. There were no significant voltage drop (above 5% for buses and 3% for conductors)

noted in the existing campus electrical distribution system operating configuration during peak demand condition.

B. HVSC field survey noted that Feeders 1-3 and 6-8 are presently operating as four separate radial feeders. Sectionalizing switches S1-3 and S8-1 are isolating the feeders from operating as loop system.

C. The field survey also noted that Feeders 2-4 and 5-7 are presently operating as loop or ring bus with their appropriate sectionalizing switches in closed position.

D. From Feeder cable ampacity and NEC 215-3B1, only Feeder set 1-3 complies with code while the remaining three sets of feeders are not in compliance with NEC feeder ampacity sizing. Note: NEC 215.2 which states that the feeder ampacity should equal to the sum of the transformer rated full load current.

E. Simulating typical peak demand which includes photovoltaic system generation and PG&E contribution, the current flows throughout the campus distribution system are within existing feeder ampacity sizes. This load flow study doesn’t alleviate the NEC feeder ampacity code requirement. Compliance is still a requirement.

F. It was noted that Feeders 2-4 and 5-7 have a combination of two different wire sizes AWG 2/0 and 350MCM. When these feeders operate as a loop system the maximum load current will be limited to the smallest cable ampacity size.

G. From an efficiency point of view, the Photovoltaic System should be connected to 4.16kV main bus for maximum efficiency. If not feasible, then the feeder with the highest loading will be preferred.

H. The feeder loadings (connected transformers) are imbalanced. For example, Feeder 5-7 has a total connected transformers load of 5,837.5kVA while Feeder 1-3 only has a total of 1,150kVA. Industry practice is to have all feeders share equal loading where feasible and practical.


December 2015 9

I. The load flow and feeder studies indicate that campus should not operate in a loop system because of the number of connected transformers and NEC feeder ampacity requirements are not in compliance. The campus will need to redistribute some transformers in order to meet the NEC feeder ampacity requirement. For example, some of the transformers connected on Feeders 7 and 8 need to be reconnected to other feeders.

4. Protective Device Coordination Study:

The result of the protective device coordination is shown in Appendix E and the highlights are as follows:

A. TCC PG&E: The 4.16kV main breaker phase relay needs to be adjusted to trip

before the 21kV main breaker to improve coordination sequence.

B. TCC Main Switchgear: There doesn’t appear to be any coordination issues between the 4.16kV main breaker and feeder breakers 52-F13 and 52-68 which set to pickup at 200A for AWG 2/0 cable. However, feeder breakers 52-F24 and 52-F57 are set to pickup at 488A which will not protect the AWG 2/0 and 350MCM cables.

C. TCC Transformers above 750kVA: Because the upstream feeder breakers are set to trip at 200A, any primary fuse protection for transformers rated 200 Amps and above will allow the upstream feeder breaker to trip before the transformer primary fuse will blow. This will interrupt power to all the transformers connected on the same feeder.

5. Arc Flash Study: The result of the arc flash study indicated the incident energy release during an arcing fault at the Physical Science Building 3,000A, 208/120V main switchboard is at a high level such that there is no available protective clothing. If the main secondary breaker was adjusted from 3,000A to 2,500A then the arc flash resulted in a level 3 PPE. A sign should be affixed to the switchboard indicating that this equipment shall be de-energized before opening up the enclosure. Maintenance on the switchboard will require the switchboard be deenergized if the breaker setting is not lower. The other locations indicate low PPE level of 0 or 1. Level 3 occurs at all the Photovoltaic System 480V side of the equipment. The complete result table is in Appendix F.


December 2015 10

SECTION 3.0

ELECTRICAL EQUIPMENT PREVENTIVE MAINTENANCE SCHEDULE

1. General: Discussion with campus Building and Grounds staff and personnel indicated that there was no formal preventive maintenance schedule for the campus electrical distribution system equipment i.e. main switchgear, switches, transformers and main switchboards. Since the campus did not have any maintenance practices and records, YEI decided to assist the District in developing a proposed action plan to perform routine and periodic preventive maintenance for the campus electrical distribution system equipment. Effective preventive maintenance is a planned approach to avoid premature failure of equipment and prevent minor problems to become a major one and will eventually extend the useful life of the equipment. The ANSI - American National Standard Institute and NETA- InterNational Electrical Testing Association published and approved the “Standard for Maintenance Testing Specifications for Electrical Power Equipment and Systems”. For preventive maintenance purpose, this standard specifies what inspection and maintenance testing shall be performed for what kind of electrical distribution equipment. NETA specifies three levels of inspection and maintenance testing are specified: 1) Visual, 2) Visual and Mechanical and 3) Visual, Mechanical and Electrical. Specific activities of the three levels of inspection and maintenance testing of a particular kind of equipment are provided. The frequency of each level of inspection and maintenance testing for a particular type of electrical distribution equipment are provided in another NETA standard: “Frequency of Maintenance Test.” NETA recognizes that the ideal maintenance program is reliability based, unique to each plant and to each piece of equipment. In the absence of this information and in response to requests of a maintenance timetable, NETA presents a time-based maintenance schedule and matrix. Based on the equipment condition: to be poor or average or good and the equipment reliability requirement (criticality): to be low, medium, or high, the NETA matrix provides a multiplier. The multiplier is to be used in conjunction with NETA’s Frequency of Maintenance Tests Table. Specific condition, criticality, and reliability must be determined to correctly apply the matrix. Application of the matrix, along with the culmination of historical testing data and trending, should provide a quality maintenance timetable. Refer to NETA Tables in Appendix C. Refer to Equipment Tables in Appendix C for the recommended schedules, priorities and activities listed for each classification of equipment applicable to this campus electrical


December 2015 11

distribution system. It is recommended that the District set up a preventive maintenance program for all three campuses. To execute the maintenance program, the District may consider procuring a maintenance contract through qualified Electrical Contractor and Testing firms.

December 2015

SECTION 4.0 - ELECTRICAL DISTRIBUTION SYSTEM REPLACEMENT AND IMPROVEMENT ANALYSIS

Priority No. Equipment No.Ref Item

No.

NA 21kV Equipment 4.1

1A

1B 4.16kV Switchgear 4.2

1B Transformers T10A 4.3 E

1C Switch S2-1 4.3 B

1C Transformers T14 4.3 E

Priority 3: The physical condition of the electrical distribution system equipment observed during limited survey consists of either moderate or on-going deterioration, and should be corrected within 24-36 months to reduce the possibility of potential downtime and higher repair cost if deferred further.

Priority 4: Other physical condition of the electrical distribution equipment observed during limited survey is of a lesser nature, including items of deferred maintenance, and/or items that will reduce normally expected useful life of the component or system.

Priority 1B: The electrical distribution system equipment noted has conditions that may lead to equipment failure in the near term. It is recommended that the District, within three months of the final report, have the condition investigated by a qualified and certified Equipment Electrician to identify the cause of the test result and to make recommendations to repair or replace. No action may lead to further deterioration of material and eventual failure.Priority 1C: The physical condition of the observed materials, equipment and related components during limited survey requires the District to within six months of the final report to further investigate by a qualified and licensed personnel or firm to further investigate, test and make recommendation or necessary repairs. No action may lead to further deterioration of material and eventual failure.

Priority Definition

Priority 1A: The electrical distribution system equipment observed during the limited survey has code violations or other conditions related to life/fire safety that require immediate attention. It is recommended that the District take immediate action to further investigate and correct this condition.

Priority 2: Correction of the electrical distribution system equipment which, if left uncorrected, could result in accelerated deterioration of the system in question and significantly increases the cost to correct. Such physical condition requires corrective action within 12-18 months.

Not Applicable (NA): The equipment was installed in the last 5 years and relatively new hence has a large part of useful life remaining.

$5,000

Ultrasonic sound test indicated possible electrical issue. Per Thermotest's report (Appendix F), it is recommended that Feeder 6 and 8 section be inspect by qualified Electrical Testing Company per report's recommendation. It is also recommended that all switchgear compartments be inspect and routine maintenance be performed at the same during upcoming Xmas holiday. Also, Test, calibrate and adjust relay settings per SKM Protective Device Coordination Study.

$15,000

Art: Replace existing oil stained transformer and Oil Switch (see Switches above). Oil stains appears to have been there for awhile. Note: There is future plan to demo Art building and replace with 100K SF new building

$35,000

With limited visual observation and survey, there apparently is no electrical distribution equipment in this study that meets this priority definition.

Priority 1B Total

Ultrasonic sound test indicated possible electrical issue. Inspect by certified Electrician/Equipment Specialist and if necessary repair transformer.

Estimated Construction Description

Oil stains noted and enclosure in poor condition. Oil stains appears to have been there awhile. Replace existing switches with outdoor padmount 600A, 3-way vacuum type switches and install new 600A elbows

$90,000

Priority 1CTotal $125,000

$0

$20,000

Located adjacent to the Engineering Technology Building east wall is the outdoor 21kV switchgear which is connected to a 21-4.16kV, 5000kVA oil filled padmounted stepped down transformer. The transformer is located in a concrete building across from the 21kV switchgear. This equipment was installed in 2007 and hence has been in operation for approximately 7 years. The equipment has more than 25+ years of useful life with scheduled maintenance per NETA and equipment manufacturer’s recommendation. No replacement is recommended.

NA

December 2015


2Main Substation and Switchgear

Equipment4.2

2 Cables Ring 4.3 A 1

2 Switch STC-4-4 4.3 B

2 Switch S1-3 4.3 B

2 Switch S8-1 4.3 B

2 Switch S6-8 4.3 B

2 Switch S-5 4.3 B

2 Manholes Repair 4.3 B

2Redistribution of

Transformers and Upgrade feeders

4.3 D 1

2 Transformers T17 4.3 E


2 Main Switchboards - Performing Arts 4.3 F

2 Arc Flash Label Requirements 4.3 H

$100,000

Performing Arts: Replace existing padmount transformer and adjacent 100A panel.

$40,000

Replace existing Westinghouse 3,000 Amps, 480/277V main switchboard, breakers and related equipment. Main circuit breaker is oversized for existing transformer size.

$0

$20,000

Music: Replace outdoor silicone filled transformer. Possible PCB contaminated liquid per CA regulation of < 50PPM. Main circuit breaker is undersized for existing transformer size. District’s Environmental Specialist to check if in compliance with EPA Regulation.

$60,000

It is recommended that the labels be printed out from arc flash study and submitted to the District for affixing to the equipment by campus electrician. The study indicated that the Physical Science Building's transformer and main switchboard connection resulted in a situation that the equipment must be de-energized before performing any maintenance and inspection. Apparently there are no personal protective clothing available that can protect a person working on this equipment while energized. However, further adjustment of the breaker settings may reduce the incident energy to a lower level.

$850,000

$125,000

The main substation distribution electrical equipment located in the same building as the 21-4.16kV, 5000kVA padmounted transformer described above. The 4.16kV outdoor metal clad switchgear with main breaker and 4 feeder breakers were installed approximately 40+ years ago. As indicated in the Task 1 report, this equipment has exceeded its useful life and should be scheduled for replacement within the next 2-3 years. The circuit breakers operating mechanism and arc chutes extinguisher and related components have greatly been improved in technology over 40+ years. Other modern features include remote tripping of breakers, vacuum type breakers, micro-processor based relays and meters, arc-resistant equipment and human machine interface for breaker control and data acquisition. This equipment is critical and if not schedule for frequent inspection and maintenance (per manufacturer), an equipment or component failure may cause lengthy power interruption to the entire campus. Since the existing switchgear needs to remain operating at all times, the new switchgear may need to be located in another location. Further engineering evaluation should be performed to determine optimum location and additional cost related to trenching, conduits, temporary power, additional feeder breakers, etc. Also, consideration should be given to using pad-mounted switchgear consisting of vacuum or SF6 contactor with electronic relaying and metering. The equipment savings compared to metal clad switchgear is about 30%. Additional breaker compartments should be provided for future feeder distribution to include dedicated breakers to large transformer rating such as 1,500 kVA for Student Service Center.Approximate replacement cost is $550K to replace switchgear in-kind plus additional $300K for new concrete pad, fencing, grounding, condits and other site work.

Ring out all 4.16kV cables and update single line diagram. Provide cable tags in all manholes and equipment. Corrosion resistant cable tags shall have information on AWG size, copper or aluminum, voltage rating, to and/or From Manhole or Equipment. Clean out any vegetation growth inside the manholes. Test all spare conduits to determine upstream or downstream manhole connection. Update manhole drawings to include spare conduits. Provide fireproofing tape in manholes and transformer high and low voltage termination compartments (i.e. T1, etc.).

Replace existing switches with outdoor padmount 600A, 4-way vacuum type switches and install new 600A elbows

Replace existing switches with outdoor padmount 600A, 3-way vacuum type switches and install new 600A elbowsReplace existing switches with outdoor padmount 600A, 4-way vacuum type switches and install new 600A elbows

$100,000

$90,000

Redistribution of transformers and upgrade feeder capacity – As shown in Appendix B – 4.16kV Existing Feeder Table, the transformers are heavily connected to certain feeders while other feeders are lightly loaded. It is feasible to redistribute the connected transformers so that all feeders share equal loading. Also, the cable size for one feeder is not consistent such as feeder cables 2-4, 5-7 which have AWG 350 and 2/0. Feeders with this condition may be overloaded if the loop system was sectionalized. The following changes are required for redistribution of transformers:· Convert all AWG 2/0 cables to 350MCM.· Replace all 200A junction nodes with 600A rated· Install new ductbank between MH 2-10 and 9-12 so that the east side of campus be served by one set of feeders.· Redistribute and reconnect all transformers to provide equal loading for all feeder cables. This recommendation should coordinate with the replacement of the 4.16kV main switchgear and other future utility projects. It is highly recommended that further analysis and study (Design Development) be perform to optimize transformer feeder loading and integrate with other future campus utility infrastructure and new building projects.

Replace existing switches with outdoor padmount 600A, 3-way vacuum type switches and install new 600A elbows

$3,500,000

$100,000

$100,000Replace existing switches with outdoor padmount 600A, 4-way vacuum type switches and install new 600A elbows

Priority 2 Total $5,175,000

Manholes 1, 2, 2-4, 3, 3-1, Vault 1 (by T18) and 9-2: In accordance HVSC, these manholes and vault have structural and hence safety issue. Recommend Structural Engineer to evaluate these manholes and provide repair and budget recommendations. Assume District to dewater manholes for Structural Engineer.

$90,000

December 2015


3 Cables serving Stadium 4.3 A 2

3 Reconnect PV 4.3 D3

3 Transformers T23-T28 4.3 E

3 Transformers T11, T19, and T30 4.3 E



3 Transformers T15, T20, T21, T22 4.3 E


3 Main Switchboards - Utility-Chiller 4.3 F

3

Main Switchboards - Police Trailers,

Park'g Lot & Site Lighting

4.3 F

3 Main Switchboards - Art 4.3 F

3Main Switchboards -

Gymnasium and Lockers

4.3 F

3 Main Switchboards - Humanities 4.3 F

3 Main Switchboards - Library 4.3 F

3 Main Switchboards - Performing Art 4.3 F

3Main Switchboards - Physical Ed M&W

Lockers4.3 F

$35,000

$40,000

$0

$250,000

$60,000Replace existing Westinghouse 1,200 Amps, 480/277V Main Switchboard and Distribution Panels. Main circuit breaker is undersized for existing transformer size.

Replace existing Westinghouse 1,000 Amps, 480/277V Main Switchboard and Distribution Panels. There are plans to modernize this building.

Warehouses, North Parking and SW Parking Lot: Replace with oil-filled transformers and secondary lighting panels. Main circuit breakers for T21 & T22 are undersized for connected transformer size.

$50,000

$90,000

$50,000

Replace existing Westinghouse 800 Amps, 480/277V main switchboards, breakers and related equipment.

$40,000

$150,000

$70,000

Replace existing Zinco 600 Amps, 480/277V Main Switchboard with 800A rating. Check wire ampacity and replace existing wires between transformer and switchboard if wire ampacity is not adequate.

Replace existing Westinghouse 3000 Amps, 208/120V main switchboard, breakers and related equipment. Note: There is future plan to replace this building.

Stadium: Replace existing with new padmount transformers (6 total) and updated panels and lighting controls. Consider consolidating transformers, panels and controls. Main circuit breakers for existing transformers are either undersized or oversized for connected transformer size.

$40,000

$120,000

Replace existing 800 Amps, 480/277V main switchboard, breakers and related equipment. Main circuit breaker is undersized for existing transformer size.

Replace existing SD Outdoor 400/300 Amps, 480/277V main switchboard, breakers and related equipment. Note: Main switchboard inside building. SD panel tapped from transformer secondary terminals. Coordinate with 3,000 A switchboard inside building

Family Learning Center, Old Maint/District and Gym/Offices – Replace existing transformers and wiring.

$60,000

$35,000

Counseling: Replace with oil-filled transformer. Note: There is future plan to demo counseling, Faculty Office, Learning Center and Liberal Arts and consolidate all function to 100K SF building.

Reconnect Photovoltaic System to the 4.16kV Feeders 2-4 and 6-8 to improve load distribution and lessen load on feeders.Coordinate with 4.3.D1

$650,000

Priority 3 Total

Engineering Technology: Replace dry type with oil-filled padmount transformer

Replace existing main switchboard (low voltage draw-out breakers) with Outdoor main switchboard and related breakers, etc.

Lesher Student Union: Replace with oil-filled transformer and provide protection bollards. Size Main circuit breaker for T31 for connected transformer size.

$1,740,000

Improve Stadium Lighting Feeder: Existing pull boxes are too small for proper cable bending radius. Recommend redesigning new 12kV distribution system and consolidating the 6 transformers to 4 or less. Provide separate feeders to east and west of field. Install new lighting control and contactors for existing stadium lights. Install new padmount switchgear near MH 2-4 and provide switch and fuse protection for new feeder cable to transformers and provide two switches (with key interlock) for incoming feeders 1 and 3. Estimated Construction Cost for distribution system only is: $650,000. Note: Transformers and lighting controls costs are indicated in item 4.3.E.

December 2015


4

Main Switchboards - Engineering Technology

4.3 F

4 Main Switchboards - District Warehouse 4.3 F

4Main Switchboards -

Liberal Arts and Faculty Offices

4.3 F

4Main Switchboards - Science Center &

Faculty Offices4.3 F

4Main Switchboards - Family Life Ed. And

Annex4.3 F

4 Main Switchboards - Admin 4.3 F

4Main Switchboards - Learning Center &

Math4.3 F

4 Main Switchboards - Music 4.3 F

4 Main Switchboards - Student Union 4.3 F

4 Main Switchboards - Counseling 4.3 F

Notes:

END OF SECTION 4.0

$50,000

$40,000

$25,000

$40,000

$1,500

$441,500

$7,501,500

Replace 1600A, 208/120V main switchboard, breakers and related equipment

Replace existing 600 Amps, 480/277V main switchboard, breakers and related equipment.

Replace existing 400 Amps, 480/277V main switchboard, breakers and related equipment. Main circuit breaker is undersized for existing transformer size.

$60,000

$45,000

$70,000

Replace existing Westinghouse 1200 Amps, 480/277V main switchboard, breakers and related equipment.

1. Budget Cost Estimates: All of the above cost estimates are based on conceptual level and high level estimating and on engineering judgment. it is recommended that further engineering evaluation, alternatives and preliminary engineering be performed to some of the above recommendations and to identify interfaces with other future projects e.g. Art, Science Complex, Gymnasium Complex, etc. and to prepare a higher level of construction cost estimate for District’s Capital Improvement Project budget.

Priority 4 Total

Replace existing GTE/Sylvania 225 Amps, 480/277V and Westinghouse 175Amps main switchboard, breakers and related equipment.

$50,000Replace existing Westinghouse 800 Amps, 480/277V main switchboard, panels, breakers and related equipment. There is future plan to replace this complex with 100K SF new building.

$60,000Replace existing Westinghouse 1,200 Amps, 480/277V Main Switchboard and Distribution Panels. There are future plans to replace this building.

GRAND TOTAL PRIORITY 1-4

Replace existing 400 Amps, 208/120V main switchboard, breakers and related equipment.

Main circuit breaker undersized for connected transformer size. Replace breaker if frequent tripping occurs.

Replace existing 208/120V main circuit breaker and related equipment. Install new distribution panel.


December 2015

APPENDICES

A – Drawing E-1: Campus Electrical Distribution System One Line Diagram

Drawing E-2: Campus Electrical Site Plan

B – Existing 4.16kV Feeder Tables

C – Electrical Equipment Preventative Maintenance Schedule Tables



• Transformers


D – SKM Short Circuit and Load Flow – One Line Diagram

E – SKM Time Current Curve (TCC)







F – Arc Flash Evaluation NFPA Table


December 2015

APPENDIX A

Drawings

E-1: Campus Electrical Distribution System One Line Diagram

E-2: Campus Electrical Site Plan


December 2015

APPENDIX B

Existing 4.16kV Feeder Table

Transformer Building Amps @ 4.16kV T Ratio (7) T-kVA PeakDemand

No. Description 1 3 2 4 5 7 6 8 NotesT1 Engineering Tech 1000 138.79 7.19% 288.13T2 Police Trailer, Parking Lot 500 69.40 3.59% 144.06T3 Library 750 104.09 5.39% 216.09

T3A Physical Science 1000 138.79 7.19% 288.13T4 Life Science 500 69.40 3.59% 144.06 (4) Peak Demand is defined as during summer months at 2-3PM where PV is at max generation.T5 Science Center 500 69.40 3.59% 144.06 (5) Assume Peak Load occurs during early afternoon. These loads are not energized and not included

T5A Life Health Science 750 104.09 5.39% 216.09 in peak demand load flow calculations.T6 Lake 112.5 NA NA Note 5 (6) Load Profile is defined as load Measurement over total transformer connected full load Amps.T7 Book Center 500 69.40 3.59% 144.06 (7) T Ratio defined as Individual Transf Rating/Total Connected Transformers during peak period.

T7A Math and Faculty Offices 500 69.40 3.59% 144.06T8 Counciling 150 20.82 1.08% 43.22T9 Liberal Arts 750 104.09 5.39% 216.09

T10 Administration 500 69.40 3.59% 144.06T10A Learning Center 500 69.40 3.59% 144.06T11 Family Life Center 112.5 15.61 0.81% 32.41

T11A Business-Foreign Language 750 104.09 5.39% 216.09T12 Humanities 500 69.40 3.59% 144.06T13 Student Service Center 1500 208.19 10.78% 432.19T14 Art 750 104.09 5.39% 216.09T15 North Parking Lot 75 NA NA Note 5T17 Performing Arts 750 104.09 5.39% 216.09T18 Physical Education and Pool 500 69.40 3.59% 144.06T19 Old Maintenance 75 10.41 0.54% 21.61T20 Warehouse Maintenance 225 31.23 1.62% 64.83T21 Warehouse Maintenance 30 4.16 0.22% 8.64T22 Southest Parking Lot 45 NA NA Note 5T23 Stadium Lights 30 NA NA Note 5T24 Stadium Lights 75 NA NA Note 5T25 Stadium Lights 30 NA NA Note 5T26 Stadium Lights & Trailers 225 NA NA Note 5T27 Stadium Lights 45 NA NA Note 5T28 Stadium Lights 75 NA NA Note 5T29 Music 300 41.64 2.16% 86.44T30 Gym Offices 300 41.64 2.16% 86.44T31 Lesher Student Union 225 31.23 1.62% 64.83

T-4318 21-4.16kV Main Transformer NA NA Note 5TPV1 PV Equipment 500 NA NA Note 5TPV3 PV Equipment 500 NA NA Note 5TPV4 PV Equipment 500 NA NA Note 5

100.00%Total Transfs kVA per Feeder 480 870 1005 2325 2075 3763 113 4000

FLA Per Feeder @ 4.16kV (Amps) 66.62 120.75 139.48 322.69 287.99 522.20 15.61 555.16

FLA as Loop/Ring Bus per NEC (1)

(E) Feeder Sizes in use (2) (3) #2/0 #2/0 350 MCM & #2/0

350MCM & #2/0

350MCM & #2/0

350MCM & #2/0 #2/0 #2/0

Load Measurement, Amps at 4.16kV (6)

Load Profile (6)Total Transf kVA excluding non contribution transformers during

peak Peak Demand Kva (4)

Total Transformer kVA During Peak Demand (4) 4010.00

APPENDIX B - EXISTING 4.16kV FEEDER TABLEFeeders

13918

187.37 462.17 810.19 570.77

4010

34 138 239 168

13% 30%

(1) If loop then cable ampacity needs to be = or > than Amps shown.

29% 29%

(2) Existing Single Feeder Cable Ampacity: MV90, AWG 2/0 For Loop System: AWG 2/0 = 370A; 350MCM = 630A(3) Per NEC 215.3(B)(1) and NEC Table 310.15(B)(16). Assume existing Feeder Ampacity complys


December 2015

APPENDIX C

Electrical Equipment Preventative Maintenance Schedule Tables



• Transformers


TABLES FROM NETA STANDARD - FREQUENCY OF MAINTENANCE TEST

ELECTRICAL EQUIPMENT PREVENTIVE MAINTENANCE SCHEDULE FOR BREAKERS AND SWITCHES

Equipment Type

Description of Equip. Location Manufacture Mfr Date Condition

(TABLE 1) Visual Visual & Mechanical

Visual, Mechanical &

Electrical

MV BREAKER

MAIN Breaker 1200A 52-M

Outdoor in metal enclosed enclosure - Campus main substation located midway

of Maintenance-Utility Bldg.

GE 2007 2.5 30 30 90

MV BREAKER

Main Circuit Breaker (52-1)



W Porcel line 1970s est. 0.5 6 6 18

MV BREAKER

North Loop Feeder Breaker (52-2)



Cutler Hammer DHP-VR

mid 1990s est 1 12 12 36

SWITCHES STC-4-4 TEC Jan 1994 1 12 12 36

SWITCHES S1 - 3 Nelson Electric 1980s est. 1 12 12 36

SWITCHES S8 - 1 Powell-Esco 1998 1 12 12 36

SWITCHES S6 - 8 Nelson Electric Feb 1997 1 12 12 36

SWITCHES S-5 Nelson Electric Aug 1985 0.75 9 9 27SWITCHES S2 - 1 Nelson Electric 1980s est. 0.25 3 3 9

Equipment Information Maintenance Frequency in Months

ELECTRICAL EQUIPMENT PREVENTIVE MAINTENANCE SCHEDULE FOR TRANSFORMERS

Equipment Type Labeled in Field

Transformer Connected to Main Switchboard at: Mfr Date Condition

(Table 1) Visual Visual & Mechanical

Visual, Mechanical & Electrical

Transformer T1 Engineering Technology Est. 1970 0.25 0.25 3 6Transformer T2 Police Trailers and Site Lighting Jul 1991 1 1 12 24Transformer T3 Library 1969 2.5 2.5 30 60Transformer T3A Physical Science Feb 1990 1 1 12 24Transformer T4 Planetarium and ATC Nov 1998 1.5 1.5 18 36

Transformer T5 Science Center and Faculty Office 2000 est 0.5 0.5 6 12

Transformer T5A Utiliyt-Chiller Bldg 1970s est 2.5 2.5 30 60Transformer T6 Lake 2004 2.5 2.5 30 60

Transformer T7 Math and Faculty Offices Early 2000 est. 1 1 12 24

Transformer T7A Bookstore Early 2000 est. 1.5 1.5 18 36

Transformer T8 Counseling 1970s est 0.5 0.5 6 12

Transformer T9 Liberal Arts 1970s est 0.5 0.5 6 12

Transformer T10 Administration Mar 2009 2.5 2.5 30 60

Transformer T10A Learning Center Jul 1992 1 1 12 24

Transformer T11 Family Life 1970s est 0.25 0.25 3 6Transformer T11A Business Foreign Language Feb 2000 2 2 24 48Transformer T12 Humaniies Nov 2011 1.5 1.5 18 36Transformer T13 Student Service Center Oct 2011 2.5 2.5 30 60Transformer T14 Art 1970s est 0.25 0.25 3 6Transformer T15 North Parking Lot Sep 1990 1 1 12 24Transformer T17 Performing Arts Center 1970s -est 1 1 12 24

Transformer T18 Phyiscal Education - Mens-Womens Lockers

Rebuilt Jun 2003 2.5 2.5 30 60

Transformer T19 District Warehouse 1970s -est 0.5 0.5 6 12Transformer T20 Maintenance - Building & Grounds 1970s -est 0.5 0.5 6 12


ELECTRICAL EQUIPMENT PREVENTIVE MAINTENANCE SCHEDULE FOR TRANSFORMERS

Equipment Type Labeled in Field

Transformer Connected to Main Switchboard at: Mfr Date Condition

(Table 1) Visual Visual & Mechanical



Transformer T21 Bus Shelter, Tennis Courts, Sign 1970s -est 0.5 0.5 6 12Transformer T22 Southwest Parking Lot 1970s -est 0.5 0.5 6 12Transformer T23 Stadium Lights 1970s -est 0.5 0.5 6 12Transformer T24 Stadium Lights 1970s -est 0.5 0.5 6 12Transformer T25 Stadium Lights 1970s -est 0.5 0.5 6 12Transformer T26 Stadium Lights 1990s est 2 2 24 48Transformer T27 Stadium Lights 2000 est 1 1 12 24Transformer T28 Stadium Lights 1970s -est 0.5 0.5 6 12Transformer T29 Music 1970s -est 0.5 0.5 6 12Transformer T30 Gymnasium - Lockers 1970s -est 0.5 0.5 6 12

Transformer T31 Lesher Student Union UNK - est 1975 1 1 12 24

Transformer T-4318 PG&E Transformer 12/13/2007 2.5 2.5 30 60Transformer TPV1 Photovoltaic in Parking Lot Aug 2007 2.5 2.5 30 60Transformer TPV3 Photovoltaic in Parking Lot Jun 2008 2.5 2.5 30 60Transformer TPV4 Photovoltaic in Parking Lot Aug 2007 2.5 2.5 30 60

ELECTRICAL EQUIPMENT PREVENTIVE MAINTENANCE SCHEDULE FOR MAIN SWITCHBOARDS

Equipment Type Buiilding MFR Mfr Date Condition (Table 1) Visual Visual &

Mechanical


Switchboard Library W 1969 0.25 3 3 6Switchboard Performing Art Center 1 - SD QEC 1990s est 0.5 6 6 12Switchboard Performing Art Center 2-Westinghouse 1974 0.25 3 3 6Switchboard Physical Science GE Spectra Series 2000+ est 2.5 30 30 60

Switchboard Planetarium and ATC Room 104

Eaton Cutler Hammer Pow-R-Line C Sep 2005 2.5 30 30 60

Switchboard Planetarium Cutler Hammer Sep 2005 1 12 12 24

Switchboard Science Center Faculty Offices Upstairs GE 1980s est 0.5 6 6 12

Switchboard Utility Bldg - Chillers GE 1970s est. 0.5 6 6 12

Switchboard Police Trailers, Parking Lot and Site Lighting

Westinghouse OD in walkin enclosure est 1970 0.5 6 6 12

Switchboard Engineering Technology Westinghouse Indoor Enclosure 1970 0.25 3 3 6

Switchboard Book Store Eaton-Cutler Hammer Pow R Line Jul 2005 2.5 30 30 60

Switchboard Art Westinghouse 1974 0.25 3 3 6

Switchboard Student Service Center Rm 153 GE Power Break Jun 2012 2.5 30 30 60

Switchboard Business Foreigh Language Square D QED mid 2000 est. 2 24 24 48

Switchboard Family Life Educ Elect Rm access outside

Westinglhouse Is this subpanel? mid 1980s 1 12 12 24

Switchboard Family Life Anx Elect Rm inside Toddler Room

GTE Sylvania Main Panel for T11 early 1990s est. 1 12 12 24

Switchboard Administration Room 120 Delta early 1980s 1 12 12 24

Maintenance Frequency in MonthsEquipment Information

ELECTRICAL EQUIPMENT PREVENTIVE MAINTENANCE SCHEDULE FOR MAIN SWITCHBOARDS

Equipment Type Buiilding MFR Mfr Date Condition (Table 1) Visual Visual &

Mechanical


Maintenance Frequency in MonthsEquipment Information

Switchboard Physical Educ, Men & Women Locker GE 1980s est. 1 12 12 24

Switchboard District Warehouse (Old Maint) Not accessible 1970s est. 0.25 3 3 6

Switchboard Life Health Sci Rm 119B - Elect Rm

GE Spectra Series with Power Break II Aug 2004 1.5 18 18 36

Switchboard Counciling Panel in closet Rm 132

Westinglhouse (Is this subpanel?) Late 1970 est 0.25 3 3 6

Switchboard Gymnasium & Lockers Cutler Hammer Late 1970 est 0.25 3 3 6Switchboard Humanties Room H115 Zinsco Late 1970 est 0.25 3 3 6Switchboard Learning Center and Math Siemens July 1992 1 12 12 24

Switchboard Liberal Arts & Faculty Office Room A127 Westinghouse 1971 0.25 3 3 6

Switchboard Math - Faculty Offices Room MA270

Cutler Hammer Pow-R-Line Jul 1998 2.5 30 30 60

Switchboard Music SD UNK 1 12 12 24Switchboard North Parking Lot Westinghouse UNK 1 12 12 24Switchboard Southwest Parking Lot GE UNK 1 12 12 24Switchboard Student Union Room 108A GE SCP Plus 1990s est 2 24 24 48Switchboard Stadium Lights W 1980s est 2 24 24 48Switchboard Stadium Lights W 1980s est 2 24 24 48Switchboard Stadium Lights W 1980s est 2 24 24 48Switchboard Sports Lighting W 1980s est 2 24 24 48Switchboard Stadium Lights UNK 2000s est 2 24 24 48Switchboard Stadium Lights W 1970s -est 2 24 24 48

Switchboard Maint., BG, PE#3, Hort CR Eaton Cutler Hammer Pow-R-Line C Dec 2010 2.5 30 30 60

Switchboard Bus Shelter, Irrig, Tennis Cts, DVC Sign W 1970s est. 0.25 3 3 6


December 2015

APPENDIX D

SKM Short Circuit and Load Flow – One Line Diagram

APPENDIX - DONE LINE DIAGRAM

DIABLO VALLEY COLLEGESKM SHORT CIRCUIT AND LOAD FLOW

CASE 1, EXISTING CONDITION

May 2015 (YEI-1460-DVC)

PG&E-1

3P 3509.00 ASLG 1962.93 ALF kW 2636.85 kWLF kVAR 247.53 kVARLF PF 1.00

21KV.SWGR.PGE21000.0 V3P 3692.44 ASLG 2030.17 AVD= 0.35 %

S

P

XF-TU5000 kVAZ% 7.0000 %Tap 0.00 %LF kVA 2648.44 kVA

LF kW 2636.85 kWLF kVAR 247.53 kVARLF PF 1.00

5KV.MAIN SWGR4160.0 V3P 7357.53 ASLG 7974.68 AVD= 1.17 %

PD-PGE

COOPERSettingsPhase CLPU (1000:1 CT) 540 (540A) [133] ResponseGround CLPU (1000:1 CT) 240 (240A) [133] Response

21kV MAINCT Ratio 200 / 5 ABASLERSettingsPhase LTPU 5 (200A) Time Dials 10Ground Pickup 0.5 (20A) C, Curve C 1

52-F13CT Ratio 400 / 5 ABASLERSettingsPhase Pickup 2.5 (200A) V, Very Inverse 2 INST 80 (6400A)Ground Pickup 1.5 (120A) E, Extremely Inverse 2

52-MAINCT Ratio 1200 / 5 ABASLERSettings Pickup 5 (1200A) V, Very Inverse 2

L.Eng.TechnologyDesignLoad 292.33 kVALF PF 1.00

52-F24CT Ratio 400 / 5 ABASLERSettingsPhase Pickup 6.1 (488A) V, Very Inverse 2 INST 70 (5600A)Ground Pickup 2 (160A) E, Extremely Inverse 2

52-F57CT Ratio 400 / 5 ABASLERSettingsPhase Pickup 6.1 (488A) V, Very Inverse 2 INST 70 (5600A)Ground Pickup 2 (160A) E, Extremely Inverse 2

52-F68CT Ratio 400 / 5 ABASLERSettingsPhase Pickup 2.5 (200A) V, Very Inverse 2 INST 80 (6400A)Ground Pickup 1.5 (120A) E, Extremely Inverse 2

CBL-F24-MH#1350 AWG/kcmilLength 50.0 ftQtyPerPhase 1LF Current 137.37 A

LF kW 978.12 kWLF kVAR 14.73 kVARLF PF 1.00LF kVA 978.23 kVADesign Ampacity 325.0 AConnectedComponent1 52-F24ConnectedComponent2 5KV.F24-MH1

S

P

XF-T1 (Z%=5.9)1000 kVAZ% 5.7499 %Tap 0.00 %LF kVA 293.25 kVA


L4.SWBD.T1480.0 V3P 15642.15 ASLG 17078.23 AVD= 1.50 %

CBL-F4-MH1350 AWG/kcmilLength 50.0 ftQtyPerPhase 1LF Current 84.10 A

LF kW 598.71 kWLF kVAR 11.64 kVARLF PF 1.00LF kVA 598.82 kVADesign Ampacity 395.0 AConnectedComponent1 5KV.F24-MH1ConnectedComponent2 5KV.F4-MH1

L.Art BLDGDesignLoad 219.25 kVALF PF 1.00

S

P




CBL-F2-MH9350 AWG/kcmilLength 1094.0 ftQtyPerPhase 1LF Current 53.27 A

LF kW 379.31 kWLF kVAR 2.98 kVARLF PF 1.00LF kVA 379.32 kVADesign Ampacity 325.0 AConnectedComponent1 5KV.F24-MH1ConnectedComponent2 5KV.S2-1

L.Old.MaintenanceDesignLoad 21.92 kVALF PF 1.00

S

P

XF-T1975 kVAZ% 3.4948 %Tap 0.00 %LF kVA 22.01 kVA



CBL-F2-MH9.142/0 AWG/kcmilLength 1381.0 ftQtyPerPhase 1LF Current 22.36 A

LF kW 159.03 kWLF kVAR 0.19 kVARLF PF -1.00LF kVA 159.03 kVADesign Ampacity 185.0 AConnectedComponent1 5KV.S2-1ConnectedComponent2 5KV.MH9.14

L.Physical Education and PoolDesignLoad 146.16 kVALF PF 1.00

L.Performing ArtsDesignLoad 219.25 kVALF PF 1.00

L.Warehouse MaintenaceDesignLoad 8.77 kVALF PF 1.00

S

P




L.Warehouse Maintenace1DesignLoad 65.77 kVALF PF 1.00

BUSWAY1200 AWG/kcmilLength 25.0 ftQtyPerPhase 1LF Current 368.87 A

LF kW 2622.72 kWLF kVAR 149.65 kVARLF PF 1.00LF kVA 2626.99 kVADesign Ampacity 1200.0 AConnectedComponent1 21KV.SWGRConnectedComponent2 52-MAIN

21KV.SWGR4160.0 V3P 7383.21 ASLG 8070.36 AVD= 1.16 %

FU-T1CUTLER-HAMMERSettings 150.0 Amps

PD-T1WESTINGHOUSESettings LTD INST 3.4 (4080A)

PD-T14CUTLER-HAMMERSettings Thermal Curve (Fixed) INST (3000-8000A) 4593.4697 (4593.47A)


CBL-F4-T12/0 AWG/kcmilLength 50.0 ftQtyPerPhase 1LF Current 41.19 A

LF kW 293.24 kWLF kVAR 5.00 kVARLF PF 1.00LF kVA 293.28 kVADesign Ampacity 225.0 AConnectedComponent1 5KV.F4-MH1ConnectedComponent2 5KV.T1

5KV.T14160.0 V3P 7151.90 ASLG 7598.61 AVD= 1.19 %

CBL-F4-MH9.2350 AWG/kcmilLength 1156.0 ftQtyPerPhase 1LF Current 42.91 A

LF kW 305.43 kWLF kVAR 6.57 kVARLF PF 1.00LF kVA 305.50 kVADesign Ampacity 325.0 AConnectedComponent1 5KV.F4-MH1ConnectedComponent2 BUS-0341

S

P




CBL-F24-STC4-42/0 AWG/kcmilLength 288.0 ftQtyPerPhase 1LF Current 11.95 A

LF kW 84.85 kWLF kVAR 3.31 kVARLF PF 1.00LF kVA 84.91 kVADesign Ampacity 225.0 AConnectedComponent1 5KV.T17ConnectedComponent2 5KV.STC4

PD-T17CUTLER-HAMMERSettings Thermal Curve (Fixed) INST (4000-12000A) 4000 (4000A)


CBL-F4-MH9.102/0 AWG/kcmilLength 744.0 ftQtyPerPhase 1LF Current 42.91 A

LF kW 305.18 kWLF kVAR 6.82 kVARLF PF 1.00LF kVA 305.26 kVADesign Ampacity 225.0 AConnectedComponent1 BUS-0341ConnectedComponent2 5KV.T17

S

P




CBL-F2-F4 TIE2/0 AWG/kcmilLength 350.0 ftQtyPerPhase 1LF Current 11.80 A

LF kW 83.81 kWLF kVAR 0.90 kVARLF PF -1.00LF kVA 83.81 kVADesign Ampacity 225.0 AConnectedComponent1 SW.STC4ConnectedComponent2 5KV.MH9.14

PD-T18GESettings Thermal Curve (Fixed) INST (3-8 x Trip) LO (3600A)


S

P






SW.STC4G&W


CBL-T182/0 AWG/kcmilLength 219.0 ftQtyPerPhase 1LF Current 20.65 A

LF kW 146.63 kWLF kVAR 2.19 kVARLF PF 1.00LF kVA 146.65 kVADesign Ampacity 225.0 AConnectedComponent1 5KV.STC4ConnectedComponent2 5KV.T18

5KV.T184160.0 V3P 5515.33 ASLG 4877.02 AVD= 1.44 %


LF kW 22.01 kWLF kVAR 0.22 kVARLF PF 1.00LF kVA 22.01 kVADesign Ampacity 225.0 AConnectedComponent1 5KV.STC4ConnectedComponent2 5KV.T19

5KV.T194160.0 V3P 5668.69 ASLG 5093.25 AVD= 1.42 %

PD-T19CUTLER-HAMMERSettings Thermal Curve (Fixed) INST (5-10 x Trip) 5 (1250A)

PD-T21CUTLER-HAMMERSettings Thermal Curve (Fixed) INST (500-1000A) LO (500A)

FU-T21COOPERSettings 6.0 Amps

CBL-F57-MH#1350 AWG/kcmilLength 50.0 ftQtyPerPhase 1LF Current 238.19 A

LF kW 1696.01 kWLF kVAR 29.42 kVARLF PF 1.00LF kVA 1696.26 kVADesign Ampacity 325.0 AConnectedComponent1 52-F57ConnectedComponent2 5KV.F57-MH1

CBL-5-7350 AWG/kcmilLength 1094.0 ftQtyPerPhase 1LF Current 96.40 A

LF kW 686.25 kWLF kVAR 11.74 kVARLF PF 1.00LF kVA 686.35 kVADesign Ampacity 325.0 AConnectedComponent1 5KV.F57-MH1ConnectedComponent2 5KV.MH9

CBL-7/2350 AWG/kcmilLength 513.0 ftQtyPerPhase 1LF Current 13.89 A

LF kW 98.70 kWLF kVAR 1.15 kVARLF PF 1.00LF kVA 98.71 kVADesign Ampacity 325.0 AConnectedComponent1 5KV.MH9ConnectedComponent2 5KV.MH5

L.Class Rm Faculty OfficeDesignLoad 146.16 kVALF PF 1.00

S

P






CBLT212/0 AWG/kcmilLength 175.0 ftQtyPerPhase 1LF Current 1.24 A

LF kW 8.84 kWLF kVAR 0.05 kVARLF PF 1.00LF kVA 8.84 kVADesign Ampacity 185.0 AConnectedComponent1 5KV.MH9.14ConnectedComponent2 5KV.T21

5KV.T214160.0 V3P 5574.56 ASLG 4948.73 AVD= 1.40 %

CBL-7350 AWG/kcmilLength 794.0 ftQtyPerPhase 1LF Current 141.80 A

LF kW 1009.43 kWLF kVAR 17.30 kVARLF PF 1.00LF kVA 1009.57 kVADesign Ampacity 325.0 AConnectedComponent1 5KV.F57-MH1ConnectedComponent2 5KV.MH5

L.HumantiesDesignLoad 146.00 kVALF PF 1.00

S

P





PD-T12CUTLER-HAMMERSettings Thermal Curve (Fixed) INST (5-10 x Trip) 5 (3000A)


LF kW 146.46 kWLF kVAR 2.17 kVARLF PF 1.00LF kVA 146.48 kVADesign Ampacity 225.0 AConnectedComponent1 5KV.MH9ConnectedComponent2 5KV.T125KV.T124160.0 V3P 6418.56 ASLG 6258.61 AVD= 1.37 %

L.Student Service CenterDesignLoad 438.49 kVALF PF 1.00

S

P





PD-T13GESettings LTPU (0.5-1.0 x P) 1 (2000A) LTD (1-4) 1 INST (1.5-10 x P) 1.5 (3000A)

CBL-T13350 AWG/kcmilLength 188.0 ftQtyPerPhase 1LF Current 61.90 A

LF kW 439.90 kWLF kVAR 7.63 kVARLF PF 1.00LF kVA 439.97 kVADesign Ampacity 395.0 AConnectedComponent1 5KV.MH9ConnectedComponent2 5KV.T135KV.T134160.0 V3P 6455.17 ASLG 6346.43 AVD= 1.38 %

L.North Parking LotDesignLoad 0.00 kVALF PF 0.00

S

P







LF kW 0.00 kWLF kVAR 0.15 kVARLF PF 0.00LF kVA 0.15 kVADesign Ampacity 185.0 AConnectedComponent1 5KV.MH9ConnectedComponent2 5KV.T155KV.T15

4160.0 V3P 6027.76 ASLG 5606.37 AVD= 1.36 %

CBL-S52/0 AWG/kcmilLength 50.0 ftQtyPerPhase 1LF Current 134.98 A

LF kW 959.11 kWLF kVAR 14.78 kVARLF PF 1.00LF kVA 959.22 kVADesign Ampacity 225.0 AConnectedComponent1 5KV.MH5ConnectedComponent2 S-5 (C7/S5)

L.Student PrsnlDesignLoad 146.16 kVALF PF 1.00

S

P

XF-T7A500 kVAZ% 5.0090 %Tap 0.00 %LF kVA 147.15 kVA


L4.SWBD.T7A480.0 V3P 9966.65 ASLG 10567.19 AVD= 2.07 %

PD-T7AWESTINGHOUSESettings LTD INST 5.0 (3000A)

FU-T7ACOOPERSettings 100.0 Amps


LF kW 147.15 kWLF kVAR 2.01 kVARLF PF 1.00LF kVA 147.16 kVADesign Ampacity 195.0 AConnectedComponent1 5KV.MH5ConnectedComponent2 5KV.T7

5KV.T74160.0 V3P 6649.44 ASLG 6647.90 AVD= 1.38 %

L.CouncilingDesignLoad 43.85 kVALF PF 1.00

S

P






CBL-MH5.12/0 AWG/kcmilLength 213.0 ftQtyPerPhase 1LF Current 114.26 A

LF kW 811.68 kWLF kVAR 12.60 kVARLF PF 1.00LF kVA 811.78 kVADesign Ampacity 225.0 AConnectedComponent1 S-5 (5/1A)ConnectedComponent2 5KV.MH5.1

5KV.T84160.0 V3P 6272.91 ASLG 6025.12 AVD= 1.51 %

CBL-T7A2/0 AWG/kcmilLength 50.0 ftQtyPerPhase 1LF Current 20.71 A

LF kW 147.15 kWLF kVAR 2.01 kVARLF PF 1.00LF kVA 147.16 kVADesign Ampacity 225.0 AConnectedComponent1 S-5 (C/17)ConnectedComponent2 5KV.T7A

5KV.T7A4160.0 V3P 6580.11 ASLG 6533.52 AVD= 1.41 %



L.Liberal ArtsDesignLoad 219.25 kVALF PF 1.00

S

P






5KV.T94160.0 V3P 6229.38 ASLG 5955.04 AVD= 1.53 %



L.Learning CenterDesignLoad 146.00 kVALF PF 1.00

S

P




PD-T10ASIEMENSSettings LTPU (20-100% x P) 100 % (600A) LTD (3-25 Seconds) 3 STPU (1.5-10 x LTPU) 1.5 (900A) STD (0.05-0.2 Sec.) 0.05 (I^2t On) INST (2-40 x LTPU) 2 (1200A) INST Override (Max) Max (6300A)

FU-T10ACOOPERSettings 75.0 Amps

5KV.T10A4160.0 V3P 5989.76 ASLG 5578.79 AVD= 1.58 %


LF kW 146.45 kWLF kVAR 2.17 kVARLF PF 1.00LF kVA 146.47 kVADesign Ampacity 225.0 AConnectedComponent1 5KV.MH5.5ConnectedComponent2 5KV.T10A


LF kW 766.73 kWLF kVAR 11.68 kVARLF PF 1.00LF kVA 766.82 kVADesign Ampacity 225.0 AConnectedComponent1 5KV.MH5.1ConnectedComponent2 5KV.MH5.3

L.Bussiness Foreigh LnguageDesignLoad 219.25 kVALF PF 1.00

S

P




PD-T11AWESTINGHOUSESettings LTD INST 4.0 (4000A)

FU-T11ACUTLER-HAMMERSettings 125.0 Amps

5KV.T11A4160.0 V3P 5642.66 ASLG 5063.42 AVD= 1.63 %


LF kW 219.93 kWLF kVAR 3.27 kVARLF PF 1.00LF kVA 219.96 kVADesign Ampacity 225.0 AConnectedComponent1 5KV.MH5.7ConnectedComponent2 5KV.T11A





L.AdministrationDesignLoad 146.16 kVALF PF 1.00

S

P








5KV.T104160.0 V3P 5972.38 ASLG 5552.15 AVD= 1.58 %

L.Family Life EducDesignLoad 33.00 kVALF PF 1.00

S

P

XF-T11112.5 kVAZ% 5.1971 %Tap 0.00 %LF kVA 33.27 kVA





5KV.T114160.0 V3P 5502.31 ASLG 4865.08 AVD= 1.62 %



CBL-F61/0 AWG/kcmilLength 250.0 ftQtyPerPhase 1LF Current 0.01 A

LF kW 0.00 kWLF kVAR 0.08 kVARLF PF 0.00LF kVA 0.08 kVADesign Ampacity 155.0 AConnectedComponent1 5KV.F68ConnectedComponent2 5KV.MH3

L.LAKEDesignLoad 0.00 kVALF PF 0.00

S

P

XF-T6112.5 kVAZ% 5.1971 %Tap 0.00 %LF kVA 0.00 kVA





CBL-F6, T62/0 AWG/kcmilLength 900.0 ftQtyPerPhase 1LF Current 0.00 A


CBL-F8, T62/0 AWG/kcmilLength 544.0 ftQtyPerPhase 1LF Current 0.00 A

LF kW 0.00 kWLF kVAR 0.00 kVARLF PF 0.00LF kVA 0.00 kVADesign Ampacity 225.0 AConnectedComponent1 5KV.T6ConnectedComponent2 S6-8 (T6)

L.Tech. EducationDesignLoad 146.16 kVALF PF 1.00

S

P







LF kW 146.62 kWLF kVAR 2.21 kVARLF PF 1.00LF kVA 146.64 kVADesign Ampacity 225.0 AConnectedComponent1 S6-8 (T2)ConnectedComponent2 5KV.T2

5KV.T24160.0 V3P 4274.19 ASLG 3373.68 AVD= 2.25 %

Open S6-8 (T6)

CBL-S8-12/0 AWG/kcmilLength 950.0 ftQtyPerPhase 1LF Current 20.82 A

LF kW 146.62 kWLF kVAR 2.21 kVARLF PF 1.00LF kVA 146.64 kVADesign Ampacity 225.0 AConnectedComponent1 S6-8ConnectedComponent2 5KV.S8-1


LF kW 296.11 kWLF kVAR 5.31 kVARLF PF 1.00LF kVA 296.16 kVADesign Ampacity 225.0 AConnectedComponent1 S8-1 (T3A)ConnectedComponent2 BUS-0393



S8-1 (T3A)S8-1 (T4)



S8-1 (T3)

L.Physical ScienceDesignLoad 295.00 kVALF PF 1.00

S

P

XF-T3A (Z%=6.02)1000 kVAZ% 5.7499 %Tap 0.00 %LF kVA 295.96 kVA



PD-T3AGESettings LTPU (0.7-1.0 x S) 1 (3000A); Fixed STPU (S=3000A) LO (8700A); Fixed INST (Fixed) Fixed (42000A); Fixed


CBL-F68-MH#12/0 AWG/kcmilLength 50.0 ftQtyPerPhase 1LF Current 166.68 A

LF kW 1186.76 kWLF kVAR 24.57 kVARLF PF 1.00LF kVA 1187.01 kVADesign Ampacity 185.0 AConnectedComponent1 52-F68ConnectedComponent2 5KV.F68

L.LibraryDesignLoad 219.25 kVALF PF 1.00

S

P







LF kW 1186.34 kWLF kVAR 24.44 kVARLF PF 1.00LF kVA 1186.59 kVADesign Ampacity 185.0 AConnectedComponent1 5KV.F68ConnectedComponent2 5KV.T3

L.Life SCIDesignLoad 146.00 kVALF PF 1.00

S

P




PD-T4CUTLER-HAMMERSettings Plug Adj (400-800A) 600A (600A) LTD (Fixed) Fixed STPU (2-8 x LTPU) 2 (1200A) STD (Fixed) Fixed (I^2t On) INST (6800A) Fixed (6800A)



LF kW 366.66 kWLF kVAR 5.68 kVARLF PF 1.00LF kVA 366.70 kVADesign Ampacity 225.0 AConnectedComponent1 5KV.T4ConnectedComponent2 5KV.T5

L.Science Center & ChillersDesignLoad 146.00 kVALF PF 1.00

S

P




PD-T5GESettings Thermal Curve (Fixed) INST (3-8 x Trip) LO (2400A)



LF kW 220.00 kWLF kVAR 3.35 kVARLF PF 1.00LF kVA 220.03 kVADesign Ampacity 225.0 AConnectedComponent1 5KV.T5ConnectedComponent2 5KV.T5A

L.LHSDesignLoad 219.25 kVALF PF 1.00

S

P

XF-T5A (Z%=5.89)750 kVAZ% 4.9999 %Tap 0.00 %LF kVA 219.95 kVA



PD-T5AGESettings LTPU (0.7-1.0 x S) 1 (1000A); Fixed STPU (S=600-1000A) LO (3000A); Fixed INST (Fixed) Fixed (42000A); Fixed


S6-8 (T2)S6-8

S-5 (5/1A) S-5 (C/17)

S-5 (C7/S5)


LF kW 1238.29 kWLF kVAR 80.31 kVARLF PF -1.00LF kVA 1240.89 kVADesign Ampacity 185.0 AConnectedComponent1 52-F13ConnectedComponent2 5KV.MH1


LF kW 239.11 kWLF kVAR 3.21 kVARLF PF 1.00LF kVA 239.13 kVADesign Ampacity 185.0 AConnectedComponent1 5KV.MH2ConnectedComponent2 5KV.MH2.8


LF kW 152.05 kWLF kVAR 2.01 kVARLF PF 1.00LF kVA 152.06 kVADesign Ampacity 185.0 AConnectedComponent1 5KV.MH2.8ConnectedComponent2 S1-3 (3/4)

L.S. Parking LotDesignLoad 0.00 kVALF PF 0.00

S

P






CBLT222/0 AWG/kcmilLength 175.0 ftQtyPerPhase 1LF Current 0.01 A


5KV.T224160.0 V3P 6683.91 ASLG 6666.10 AVD= 1.09 %

S

P

XF-PTV1500 kVAZ% 4.9999 %Tap 0.00 %LF kVA 495.59 kVA

LF kW 494.99 kWLF kVAR 24.57 kVARLF PF -1.00

FU-PTV1COOPERSettings 75.0 Amps

CBL-PTV12/0 AWG/kcmilLength 225.0 ftQtyPerPhase 1LF Current 69.49 A

LF kW 494.65 kWLF kVAR 24.77 kVARLF PF -1.00LF kVA 495.27 kVADesign Ampacity 225.0 AConnectedComponent1 5KV.MH2ConnectedComponent2 5KV.PTV15KV.PTV14160.0 V3P 6607.84 ASLG 6522.22 AVD= 1.03 %

PD-PTV1CUTLER-HAMMER

L4.SWBD.PTV1480.0 V3P 13816.46 ASLG 14474.47 AVD= 0.15 %

PV-500L1Rated kW 500 kWLF kW 500.00 kWLF PF 1.00InService In

L.Gymnasium & LockersDesignLoad 86.40 kVALF PF 1.00

S

P

XF-T30 (3x100kVA)300 kVAZ% 5.2432 %Tap 0.00 %LF kVA 86.85 kVA







5KV.T304160.0 V3P 5296.44 ASLG 4557.60 AVD= 1.23 %


LF kW 255.43 kWLF kVAR 27.90 kVARLF PF -0.99LF kVA 256.95 kVADesign Ampacity 185.0 AConnectedComponent1 5KV.MH1ConnectedComponent2 5KV.MH2

L.MusicDesignLoad 86.40 kVALF PF 1.00

S

P







LF kW 86.84 kWLF kVAR 1.28 kVARLF PF 1.00LF kVA 86.85 kVADesign Ampacity 225.0 AConnectedComponent1 5KV.MH2.8ConnectedComponent2 5KV.T295KV.T294160.0 V3P 5837.66 ASLG 5307.43 AVD= 1.19 %

L.Student UnionDesignLoad 64.83 kVALF PF 1.00

S

P




PD-T31GESettings MIN


5KV.T314160.0 V3P 5360.72 ASLG 4641.35 AVD= 1.22 %



S

P





LF kW 986.77 kWLF kVAR 50.62 kVARLF PF -1.00LF kVA 988.07 kVADesign Ampacity 225.0 AConnectedComponent1 5KV.MH22ConnectedComponent2 5KV.PTV2

5KV.PTV24160.0 V3P 6060.49 ASLG 5469.07 AVD= 0.54 %

PD-PTV2CUTLER-HAMMER

L4.SWBD.PTV2480.0 V3P 13633.53 ASLG 14340.33 AVD= -0.35 %



LF kW 983.32 kWLF kVAR 52.17 kVARLF PF -1.00LF kVA 984.71 kVADesign Ampacity 185.0 AConnectedComponent1 5KV.MH1ConnectedComponent2 5KV.MH22

CBL-F1.MH242/0 AWG/kcmilLength 356.0 ftQtyPerPhase 1LF Current 0.02 A

LF kW 0.00 kWLF kVAR 0.11 kVARLF PF 0.00LF kVA 0.11 kVADesign Ampacity 185.0 AConnectedComponent1 5KV.MH22ConnectedComponent2 5KV.MH24

S1-3 (3/4)

CBL-S1-32/0 AWG/kcmilLength 981.0 ftQtyPerPhase 1LF Current 0.00 A

LF kW 0.00 kWLF kVAR 0.00 kVARLF PF 0.00LF kVA 0.00 kVADesign Ampacity 225.0 AConnectedComponent1 5KV.MH24ConnectedComponent2 S1-3 (1/3)

Open S1-3 (1/3)

S1-3 (C/T30)

CBL-CT30

S

P





LF kW 494.40 kWLF kVAR 24.67 kVARLF PF -1.00LF kVA 495.01 kVADesign Ampacity 225.0 AConnectedComponent1 5KV.PTV2ConnectedComponent2 5KV.PTV3

5KV.PTV34160.0 V3P 5534.59 ASLG 4703.98 AVD= 0.42 %

L4.SWBD.PTV3480.0 V3P 13479.34 ASLG 14226.75 AVD= -0.46 %


L.Stadium LightsDesignLoad 0.00 kVALF PF 0.00

S

P




PD-T23WESTINGHOUSESettings Opening Clearing Curve


5KV.T234160.0 V3P 6020.79 ASLG 5486.49 AVD= 0.79 %



L.Stadium Lights/T24DesignLoad 0.00 kVALF PF 0.00

S

P




PD-T24WESTINGHOUSESettings Opening Clearing Curve


5KV.T244160.0 V3P 5813.99 ASLG 5189.63 AVD= 0.79 %



PD-PTV3CUTLER-HAMMER U.PTV

3P 0.00 ASLG 0.00 ALF kW 0.00 kWLF kVAR 0.00 kVARLF PF 0.00

U.PTV33P 0.00 ASLG 0.00 ALF kW 0.00 kWLF kVAR 0.00 kVARLF PF 0.00

U.PTV13P 0.00 ASLG 0.00 ALF kW 0.00 kWLF kVAR 0.00 kVARLF PF 0.00

L.Stadium Lights/T26DesignLoad 0.00 kVALF PF 0.00

S

P






5KV.T264160.0 V3P 5617.03 ASLG 4917.56 AVD= 0.79 %



CBL-PV22/0 AWG/kcmilLength 50.0 ftQtyPerPhase 1LF Current 69.15 A

LF kW 494.96 kWLF kVAR 24.37 kVARLF PF -1.00LF kVA 495.56 kVADesign Ampacity 225.0 AConnectedComponent1 5KV.PTV2ConnectedComponent2 BUS-0439


December 2015

APPENDIX E

SKM Time Current Curve (TCC)







PD-PGE - Phase

21kV MAIN - Phase52-MAIN

TX Inrush

XF-TU

10 100

1K 10K

100K

0.01

0.10

1

10

100

1000

CURRENT IN AMPERES

TIME IN SECONDS

PD-PGE - Phase

21kV MAIN - Phase

52-MAIN

XF-TU

PD-PGE - Phase

21kV MAIN - Phase

52-MAIN

XF-TU

21KV.SWGR.PGE21000.0 V3P 3509.00 ASLG 1992.00 ALF VD% 0.51 %

PD-PGECOOPERDescription Phase, 101-202Type Form 6 /TS, NOVAFrame/Model NOVASettingsPhase CLPU (1000:1 CT) 540 (540A) [133] ResponseGround CLPU (1000:1 CT) 240 (240A) [133] ResponseSensor/Trip 630.0 A

21kV MAINCT Ratio 200 / 5 ABASLERDescription B6Type BE1-51Frame/Model BE1-51SettingsPhase LTPU 5 (200A) Time Dials 10Ground Pickup 0.5 (20A) C, Curve C 1

S

P


LF kW 2579.71 kWLF kVAR 454.17 kVAR

52-MAINCT Ratio 1200 / 5 ABASLERDescription 5A CT, Phase ApplicationsType BE1-50/51B, Series 200 (GE)Frame/Model BE1-50/51BSettings Pickup 5 (1200A) V, Very Inverse 2

BUSWAY1200 AWG/kcmilLength 25.0 ftQtyPerPhase 1LF Current 365.40 AAmpacity 1200.0 AConductorType Copper

TCC: 21kV Main Current Scale x 1 Reference Voltage: 21000

Doug

Callout

Adjust 4.16 kV Breaker to below 21kV Breaker to improve selectivity

PD-PGE - Phase21kV MAIN - Phase

52-MAIN

TX Inrush

XF-TU

0.10

2 s

0.5 1 10 100

1K 10K

0.01

0.10

1

10

100

1000

CURRENT IN AMPERES

TIME IN SECONDS

PD-PGE - Phase

21kV MAIN - Phase

52-MAIN

XF-TU

PD-PGE - Phase

21kV MAIN - Phase

52-MAIN

XF-TU

0.10

2 s

21KV.SWGR.PGE21000.0 V3P 3692.44 ASLG 2030.17 ALF VD% 0.35 %

PD-PGECOOPERDescription Phase, 101-202Type Form 6 /TS, NOVAFrame/Model NOVASettingsPhase CLPU (1000:1 CT) 540 (540A) [133] ResponseGround CLPU (1000:1 CT) 240 (240A) [133] ResponseSensor/Trip 630.0 A

21kV MAINCT Ratio 200 / 5 ABASLERDescription B6Type BE1-51Frame/Model BE1-51SettingsPhase LTPU 5 (200A) Time Dials 10Ground Pickup 0.5 (20A) C, Curve C 1

S

P



52-MAINCT Ratio 1200 / 5 ABASLERDescription 5A CT, Phase ApplicationsType BE1-50/51B, Series 200 (GE)Frame/Model BE1-50/51BSettings Pickup 3.5 (840A) V, Very Inverse 2

21KV.SWGR4160.0 V3P 7383.21 ASLG 8070.36 ALF VD% 1.16 %

BUSWAY1200 AWG/kcmilLength 25.0 ftQtyPerPhase 1LF Current 368.87 AAmpacity 1200.0 AConductorType Copper

TCC: 21kV Main (Rev 1b) Current Scale x 1 Reference Voltage: 21000

Doug

Callout

Some improvement. 4.16kV breaker has some opportunity to trip before the 21kV breaker

52-F13 - Phase

52-MAIN

52-F24 - Phase52-F57 - Phase

52-F68 - Phase

TX Inrush

XF-TU

10 100

1K 10K

100K

0.01

0.10

1

10

100

1000

CURRENT IN AMPERES

TIME IN SECONDS

52-F13 - Phase

52-MAIN

52-F24 - Phase

52-F57 - Phase

52-F68 - Phase

XF-TU

52-F13 - Phase

52-MAIN

52-F24 - Phase

52-F57 - Phase

52-F68 - Phase

XF-TU5KV.MAIN SWGR4160.0 V3P 7357.53 ASLG 7974.68 ALF VD% 1.17 %

52-F13CT Ratio 400 / 5 ABASLERDescription 5A CT, Phase ApplicationsType BE1-50/51B, Series 200 (ABB)Frame/Model BE1-50/51BSettingsPhase Pickup 2.5 (200A) V, Very Inverse 2 INST 80 (6400A)Ground Pickup 1.5 (120A) E, Extremely Inverse 2

52-MAINCT Ratio 1200 / 5 ABASLERDescription 5A CT, Phase ApplicationsType BE1-50/51B, Series 200 (GE)Frame/Model BE1-50/51BSettings Pickup 5 (1200A) V, Very Inverse 2

52-F24CT Ratio 400 / 5 ABASLERDescription 5A CT, Phase ApplicationsType BE1-50/51B, Series 200 (ABB)Frame/Model BE1-50/51BSettingsPhase Pickup 6.1 (488A) V, Very Inverse 2 INST 70 (5600A)Ground Pickup 2 (160A) E, Extremely Inverse 2

52-F57CT Ratio 400 / 5 ABASLERDescription 5A CT, Phase ApplicationsType BE1-50/51B, Series 200 (ABB)Frame/Model BE1-50/51BSettingsPhase Pickup 6.1 (488A) V, Very Inverse 2 INST 70 (5600A)Ground Pickup 2 (160A) E, Extremely Inverse 2

52-F68CT Ratio 400 / 5 ABASLERDescription 5A CT, Phase ApplicationType BE1-50/51B, Series 200 (ABB)Frame/Model BE1-50/51BSettingsPhase Pickup 2.5 (200A) V, Very Inverse 2 INST 80 (6400A)Ground Pickup 1.5 (120A) E, Extremely Inverse 2

TCC: MAIN SWGR Current Scale x 1 Reference Voltage: 4160

52-F57 - Phase

TX Inrush

XF-T13 (Z%=3.0)

10 100

1K 10K

100K

0.01

0.10

1

10

100

1000

CURRENT IN AMPERES

TIME IN SECONDS

FU-T13

PD-T13

52-F57 - Phase XF-T13 (Z%=3.0)

FU-T13

PD-T13

52-F57 - Phase XF-T13 (Z%=3.0)

L.Student Service CenterDesignLoad 438.49 kVALF PF 1.00

S

P



L4.SWBD.T13480.0 V3P 19130.65 ASLG 21991.95 ALF VD% 1.83 %

FU-T13CUTLER-HAMMERDescription 30E-450EType HLE & CLE, 5.5kV E-RatedFrame/Model CLE, 250ESettings 250.0 AmpsSensor/Trip 250.0 A

PD-T13GEDescription LI, 200-3000ASType SS, SH PowerBreak II, MVT Plus/PMFrame/Model SHSettings LTPU (0.5-1.0 x P) 1 (2000A) LTD (1-4) 1 INST (1.5-10 x P) 1.5 (3000A)Sensor/Trip 2000.0 A

CBL-F57-T13350 AWG/kcmilLength 188.0 ftQtyPerPhase 1LF Current 61.99 AAmpacity 395.0 AConductorType Copper

5KV.T134160.0 V3P 5655.27 ASLG 5812.84 ALF VD% 1.52 %

TCC: XF-T13 Current Scale x 1 Reference Voltage: 4160 Ma

Doug

Callout

Feeder Breaker will trip before transformer fuse. No selectivity due high transformer rating.

52-F24 - Phase

TX Inrush

XF-T1

10 100

1K 10K

100K

0.01

0.10

1

10

100

1000

CURRENT IN AMPERES

TIME IN SECONDSFU-T1

PD-T152-F24 - Phase

XF-T1

FU-T1

PD-T152-F24 - Phase

XF-T1S

P



FU-T1CUTLER-HAMMERDescription 30E-450EType HLE & CLE, 5.5kV E-RatedFrame/Model CLE, 150ESettings 150.0 AmpsSensor/Trip 150.0 A

PD-T1WESTINGHOUSEDescription 700-1200AType HNBFrame/Model HNBSettings LTD INST 3.4 (4080A)Sensor/Trip 1200.0 A

F24.T14160.0 V3P 6168.38 ASLG 6809.98 ALF VD% 1.92 %

SWBD.T1480.0 V3P 15069.25 ASLG 16622.73 ALF VD% 2.39 %

L.Eng.TechnologyDesignLoad 100.00 kVALF PF 0.80

TCC: XF-T1 Current Scale x 1 Reference Voltage: 4160 Febr

Doug

Callout

For low fault currents, the feeder breaker will trip first. There is selective coordination between transformer fuse and breaker for higher fault currents.

52-F57 - Phase

TX Inrush

XF-T9

10 100

1K 10K

100K

0.01

0.10

1

10

100

1000

CURRENT IN AMPERES

TIME IN SECONDS

PD-T9

FU-T9 52-F57 - Phase

XF-T9

PD-T9

FU-T9 52-F57 - Phase

XF-T9

L.Liberal ArtsDesignLoad 219.25 kVALF PF 1.00

S

P



L4.SWBD.T9480.0 V3P 13101.10 ASLG 14417.36 ALF VD% 2.10 %

PD-T9WESTINGHOUSEDescription 700-1200AType HNBFrame/Model HNBSettings LTD INST 4.0 (4000A)Sensor/Trip 1000.0 A

FU-T9CUTLER-HAMMERDescription 30E-450EType HLE & CLE, 5.5kV E-RateFrame/Model HLE, 125ESettings 125.0 AmpsSensor/Trip 125.0 A

5KV.T94160.0 V3P 5518.04 ASLG 5549.25 ALF VD% 1.79 %

CBL-T92/0 AWG/kcmilLength 50.0 ftQtyPerPhase 1LF Current 31.08 AAmpacity 225.0 AConductorType Copper

TCC: XF-T9 Current Scale x 1 Reference Voltage: 4160 May

Doug

Callout

Good selectivity due to high setting of feeder breaker but does conform with NEC.

Doug

Callout

No selectivity for low fault currents but acceptable compromise.


December 2015

APPENDIX F

Arc Flash Evaluation NFPA Tables

Arc Flash Evaluation NFPA 70E 2015 Annex D.4 - IEEE 1584 Bus Report Project: DVC,

Bus Name ProtectiveDevice Name

BuskV

BusBolted

Fault (kA)

Prot DevBoltedFault(kA)

Prot DevArcingFault(kA)

Trip/DelayTime(sec.)

BreakerOpeningTime/Tol

(sec.)Ground Equip

TypeGap(mm)

Arc FlashBoundary

(in)

WorkingDistance

(in)

IncidentEnergy

(cal/cm2)

PPE Level / Notes(*N) Label #

1 21KV.SWGR 21kV MAIN 4.16 7.38 6.36 6.21 0.442 0.083 Yes SWG 104 130 36 4.2 Level 2 # 0001

2 21KV.SWGR.PGE PD-PGE 21.00 3.69 3.51 3.51 0.376 0.083 Yes SWG 152 154 36 22 Level 3 (*N11) # 0001

3 5KV.MAIN SWGR 52-MAIN 4.16 7.36 6.33 5.25 0.756 0.083 Yes SWG 104 176 36 5.6 Level 2 (*N3) # 0004

4 5KV.PTV1 52-F13 4.16 6.61 5.65 5.53 0.257 0.083 Yes SWG 104 74 36 2.4 Level 1 # 0005



7 5KV.T1 52-F24 4.16 7.15 7.15 6.98 0.017 0.083 Yes SWG 104 23 36 0.77 Level 0 # 0005

8 5KV.T10 52-F57 4.16 5.97 5.97 4.97 0.34 0.083 Yes SWG 104 69 36 2.3 Level 1 (*N3) # 0009

9 5KV.T10A 52-F57 4.16 5.99 5.99 4.98 0.34 0.083 Yes SWG 104 69 36 2.3 Level 1 (*N3) # 0010


11 5KV.T11A 52-F57 4.16 5.64 5.64 5.53 0.321 0.083 Yes SWG 104 74 36 2.4 Level 1 # 0011
















27 5KV.T7A 52-F57 4.16 6.58 6.58 5.47 0.323 0.083 Yes SWG 104 74 36 2.4 Level 1 (*N3) # 0022



Equations used with permission from IEEE 1584 *Copyright 2015*, by IEEE. The IEEE disclaims any responsibility or liability resulting from the placement and use in the described manner.Page 1



BuskV

BusBolted

Fault (kA)





(sec.)Ground Equip

TypeGap(mm)

Arc FlashBoundary

(in)

WorkingDistance

(in)

IncidentEnergy

(cal/cm2)


30 L2.SWBD.T10 PD-T10 0.208 22.54 22.54 7.70 0.019 0.000 Yes PNL 25 10 18 0.49 Level 0 # 0022









39L2.SWBD.T3A PD-T3A 0.208 32.64 32.64 8.49 2 0.000 Yes PNL 25 187 18 56 Dangerous! (*N3)

(*N9)# 0030

40L4.SWBD.PTV1 MaxTripTime

@2.0s0.48 13.82 4.00 3.00 2 0.000 Yes PNL 25 130 18 31 Level 4 (*N2) (*N9) # 0023


@2.0s0.48 13.63 4.00 3.00 2 0.000 Yes PNL 25 131 18 31 Level 4 (*N2) (*N9) # 0040


@2.0s0.48 13.48 4.00 3.00 2 0.000 Yes PNL 25 132 18 32 Level 4 (*N2) (*N9) # 0041


44 L4.SWBD.T10A PD-T10A 0.48 9.77 9.77 6.43 0.017 0.000 Yes PNL 25 9 18 0.35 Level 0 # 0029







51 L4.SWBD.T22 PD-T22 0.48 1.61 1.61 1.17 0.029 0.000 Yes PNL 25 4 18 0.09 Level 0 (*N3) # 0040

52 L4.SWBD.T23 FU-T23 0.48 0.77 0.77 0.63 0.063 0.000 Yes PNL 25 4 18 0.10 Level 0 (*N3) # 0051

53 L4.SWBD.T24 PD-T24 0.48 2.34 2.34 1.61 0.029 0.000 Yes PNL 25 5 18 0.13 Level 0 (*N3) # 0052





Sandy

Callout

This condition means that the equipment must be de-energized before any work inside equipment enclosure.



BuskV

BusBolted

Fault (kA)





(sec.)Ground Equip

TypeGap(mm)

Arc FlashBoundary

(in)

WorkingDistance

(in)

IncidentEnergy

(cal/cm2)










65

Level 0: UntreatedCotton

0.0 - 1.2cal/cm^2

#Level 0 =29

(*N11) - Out ofIEEE 1584 Range,Lee EquationUsed. Applicablefor Open Air only.Existing Equipmenttype is not OpenAir!

66Level 1: FR Shirt &Pants

1.2 - 4.0cal/cm^2

#Level 1 =27

(*N2) < 80%Cleared FaultThreshold

67Level 2: CottonUnderwear + FR Shirt& Pants

4.0 - 8.0cal/cm^2

#Level 2 =3

(*N3) - ArcingCurrent LowTolerances Used

68Level 3: CottonUnderwear + FR Shirt& Pant + FR Coverall

8.0 - 25.0cal/cm^2

#Level 3 =1

(*N9) - Max ArcingDuration Reached

69

Level 4: CottonUnderwear + FR Shirt& Pant + Multi LayerFlash Suit

25.0 - 40.0cal/cm^2

#Level 4 =3




BuskV

BusBolted

Fault (kA)





(sec.)Ground Equip

TypeGap(mm)

Arc FlashBoundary

(in)

WorkingDistance

(in)

IncidentEnergy

(cal/cm2)


70

Level Dangerous!: NoFR Category Found

40.0 - 999.0cal/cm^2

#Danger =1

NFPA 70E 2015Annex D.4 - IEEE1584 Bus Report ( -80% Cleared FaultThreshold, includeInd. Motors for 6.0Cycles),mis-coordinationnot checked

71#EquipEval Failed= 0

72

For additionalinformation refer toNFPA 70 E, Standardfor Electrical Safety inthe Workplace.

73

Level 0: UntreatedCotton, Hardhat +Polycarbonate FaceShield + SafetyGlasses, VoltageRated ElectricalGloves, Rubber SoledLeather Boots, Safetyglasses, Non-meltingor untreated naturalfiber(cotton/wool/rayon/silk> 4.5 oz/sq yd), shirt(long-sleeve), pants(long)., > 50V voltagerated tools + Class 0(minimum) gloves,Dielectric shoes orinsulating mat (stepand touch potential).




BuskV

BusBolted

Fault (kA)





(sec.)Ground Equip

TypeGap(mm)

Arc FlashBoundary

(in)

WorkingDistance

(in)

IncidentEnergy

(cal/cm2)


74

Level 1: FR Shirt &Pants, Hardhat +Polycarbonate FaceShield + SafetyGlasses, VoltageRated ElectricalGloves, Rubber SoledLeather Boots, Safetyglasses, electricallyrated hard hat withhood and face shield.,4 cal/sq cm, FR shirt(long-sleeve) plus FRpants (long), or FRcoverall, rainwear asneeded., > 50Vvoltage rated tools +Class 0 (minimum)gloves and leatherprotectors (flash) asneeded., Leathershoes (flash) asneeded. Dielectricshoes or insulatingmat (step and touchpotential).




BuskV

BusBolted

Fault (kA)





(sec.)Ground Equip

TypeGap(mm)

Arc FlashBoundary

(in)

WorkingDistance

(in)

IncidentEnergy

(cal/cm2)


75

Level 2: CottonUnderwear + FR Shirt& Pants, Hardhat +Polycarbonate FaceShield + SafetyGlasses + Ear CanalInserts, Voltage RatedElectrical Gloves,Rubber Soled LeatherBoots, Safety glasses,electrically rated hardhat with hood and faceshield. Hearingprotection., 8 cal/sqcm, cotton underwearT-shirt and briefs orshorts, FR shirt(long-sleeve) plus FRpants (long), or FRcoverall/coat, rainwearas needed., > 50Vvoltage rated tools +Class 0 (minimum)gloves and leatherprotectors (flash).,Leather shoes (flash)as needed. Dielectricshoes or insulatingmat (step and touchpotential).




BuskV

BusBolted

Fault (kA)





(sec.)Ground Equip

TypeGap(mm)

Arc FlashBoundary

(in)

WorkingDistance

(in)

IncidentEnergy

(cal/cm2)


76

Level 3: CottonUnderwear + FR Shirt& Pant + FR Coverall,Hardhat +Polycarbonate FaceShield + SafetyGlasses + Ear CanalInserts, Voltage RatedElectrical Gloves,Rubber Soled LeatherBoots, Safety glasses,electrically rated hardhat with hood and faceshield. Hearingprotection., 25 cal/sqcm, cotton underwearT-shirt and briefs orshorts, FR shirt(long-sleeve) plus FRpants (long), or FRcoverall/coat, rainwearas needed., > 50Vvoltage rated tools +Class 0 (minimum)gloves and leatherprotectors (flash).,Leather shoes (flash)as needed. Dielectricshoes or insulatingmat (step and touchpotential).




BuskV

BusBolted

Fault (kA)





(sec.)Ground Equip

TypeGap(mm)

Arc FlashBoundary

(in)

WorkingDistance

(in)

IncidentEnergy

(cal/cm2)


77

Level 4: CottonUnderwear + FR Shirt& Pant + Multi LayerFlash Suit, Hardhat +Polycarbonate FaceShield + SafetyGlasses + Ear CanalInserts, Voltage RatedElectrical Gloves,Rubber Soled LeatherBoots, Safety glasses,electrically rated hardhat with hood and faceshield. Hearingprotection., 40 cal/sqcm, cotton underwearT-shirt and briefs orshorts, FR shirt(long-sleeve) plus FRpants (long), or FRcoverall/coat, rainwearas needed., > 50Vvoltage rated tools +Class 0 (minimum)gloves and leatherprotectors (flash).,Leather shoes (flash)as needed. Dielectricshoes or insulatingmat (step and touchpotential).

78

Level Dangerous!: NoFR Category Found,Do not work on live!,No FR CategoryFound, Arc FlashIncident EnergyExceeds the Rating ofCategory 4 PPE., NoFR Category Found


Project P-904 - 4CD

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Transcript of Project P-904 - 4CD