C7781_Evaluation_Report.pdf

U.S. Department of Homeland Security

U.S. Coast Guard

Contract Number HSCG83-07-D-3WF170

Solicitation Number HSCG83-09-J-3WG232

Electrical System Power Distribution Evaluation

US Coast Guard BSU Portsmouth at

Portsmouth, Virginia

PN: 2709586

January 27, 2010

URS Corporation

1375 Euclid Avenue, Suite 600 Cleveland, OH 44115

Tel: 216.622.2400 Fax: 216.622.2428

ELECTRICAL SYSTEM POWER DISTRIBUTION EVALUATION

Portsmouth, VA

TABLE OF CONTENTS

SECTION DESCRIPTION PAGE

1. EXECUTIVE SUMMARY 2

2. BACKGROUND 3

3. ENGINEERING SCOPE OF SERVICES 4

4. OBJECTIVE 6

5. APPROACH 7

6. BACKGROUND – DESCRIPTION OF EXISTING CONDITIONS 8

7. ELECTRICAL SYSTEM EVALUATION 9

8. RECOMMENDATIONS 11

9. STATEMENT OF PROBABLE COST 14

APPENDICIES

TAB 1 APPENDIX A: DRAWINGS

TAB 2 APPENDIX B: UTILITY BILLING STATEMENT

TAB 3 APPENDIX C: METERING EQUIPMENT USED

TAB 4 APPENDIX D: PRIMARY FEEDER SUMMARY SHEET

TAB 5 APPENDIX E: DEMAND METERING FIELD DATA SUMMARY SHEET

TAB 6 APPENDIX F: ELECTRICAL MEASUREMENT GRAPHS

TAB 7 APPENDIX G: ELECTRICAL FIELD MEASUREMENTS RESULTS

TAB 8 APPENDIX H: STATEMENT OF PROBABLE COST

TAB 9 APPENDIX I: CABLE TREEING REPORT

1. EXECUTIVE SUMMARY

1.1 Based on review of the existing conditions, conducting measurements of the electrical distribution system, and reviewing the existing electrical drawings the following conclusions and recommendations are offered.

1.2 The existing underground feeders and the electrical distribution system, based on measurements conducted, and calculations performed, appears to be loaded below its full capacity.

1.3 Peak demand power consumption for each feeder appears to be below the available capacity (see Appendix E), allowing for the expansion of the existing system, although the two feeders are not balanced properly. There is some short term expansion capacity left in each feeder.

1.4 The addition of the new C2CEN trailers will add only 10 Amps at the 13.2 KV side which will still be below the allowed capacity of the existing feeders.

1.5 As a minimum it is recommended to replace the existing Feeder 1 and Feeder 2 cables with new, higher capacity cables to allow for additional capacity required for any additional buildings.

1.6 Our opinion of probable cost to upgrade the electrical distribution system will be broken down per individual feeder.

1.7 Replacement of the feeder cables can be accomplished in sections keeping the downtime to a minimum. Switching the portions of loads connected to the portion of feeder to be replaced between Feeders 1 and 2 will allow the work to be performed without major interruption of power to the buildings.

1.8 Future addition of the new Offshore Patrol Cutters (OPC) will add a substantial load to the existing power distribution. The existing feeder capacity will not be adequate for the additional Cutter load and the feeders will have to be upgraded as described in 8.2.1 through 8.2.11 or in 8.2.12, depending on the final power requirements of the new Cutters. In order to provide adequate capacity for the addition of new Cutters, and the replacement of the existing Cutters, the third feeder will have to be added to the power distribution system.

2. BACKGROUND

2.1 Definition of Scope: The project is to perform an electrical inspection, measurement and evaluation of the existing base-wide power distribution system at BSU Portsmouth, VA.

The existing power distribution system consists of the main incoming 15 KV switchgear serving two independent 15 KV feeders (Feeder 1 and Feeder 2). Each feeder has a number of step-down transformers connected to it through a high voltage selector switch allowing for the feeder loads to be balanced. Each feeder is sized to carry the entire power distribution system load in case of the failure of either of the two feeders.

2.2 The inspection and evaluation of the existing base wide power distribution system shall be detailed in order to determine the scope of services for the electrical sub-contractor needed to be hired to perform the required measurements.

2.3 The A/E shall examine the existing one line diagrams provided by the USCG to determine the validity of the existing base-wide power distribution system.

2.4 The A/E shall determine the location and type of the existing demand metering on the existing power distribution system.

2.5 The A/E shall determine the best location for the installation of the temporary chart recording equipment required to determine the peak demand for each step-down transformer serving various buildings.

2.6 The A/E shall engage the services of the electrical contractor to provide demand metering on the secondary side of each step-down transformer. Demand measurement shall be performed for a period of two (2) weeks.

2.7 Site Location : The work is located at the U.S. Coast Guard BSU Portsmouth, 4000 Coast Guard Blvd, Portsmouth, Virginia 23703.

2.8 Project Purpose: Determine if existing capacity is sufficient to allow for future expansion.

The existing base-wide power distribution system is suspected to be close to the design demand capacity leaving limited amount of reserve capacity for future expansion. The addition of the new C2CEN trailers currently under design, and the possible load of the new Offshore Patrol Cutters (OPC) will exceed the current feeder capacity if all of the loads are fed from one feeder. While the addition of the C2CEN trailers is not significant, the addition of OPC’s will definitely have an impact on the existing feeder capacity. These new Cutters will require much higher ampacity Shore Tie connection than the current ships.

3. ENGINEERING SCOPE OF SERVICES

3.1 Research, Site Investigation and Evaluation: The A/E shall perform thorough research, site investigation and evaluation. Research, site investigation, and evaluation shall verify or establish but not be limited to the following.

- Survey and verify the existing conditions of the base-wide power distribution system, compare with single line diagram provided by the base.

- Verify and determine the location, type and amount of the existing demand metering on the low voltage side of each step down transformer. Obtain data from the existing demand meters for comparison purpose with the new recorded data.

- Investigate and determine the most appropriate location for connection and installation of the demand meter chart recorders.

- Develop a scope of work for the electrical sub-contractor required to perform the actual demand meter recordings and readings.

- Retain services of the electrical sub-contractor to install demand meters based on scope of service provided.

- Obtain chart recorder readings from the electrical sub-contractor. The readings will be used as the base for the report findings and recommendations.

- Perform electrical analysis as required to determine the capacity of the existing 15 KV Feeder 1 and Feeder 2.

- Prepare updated one line diagram of the existing base-wide power distribution system.

- Provide recommendations, based on the findings, for any required upgrades to the existing base-wide power distribution system.

- Provide alternate solutions for upgrade of the existing 15 KV feeders, if required.

- Provide cost estimate for any upgrades recommended.

3.2 Site Investigation: The electrical engineer shall perform services during the normal unit operational hours, Monday through Friday, 8:00 am to 5:00 pm. Site visit shall be arranged with Mr. Thomas Jewett, Engineer, phone 757-483-8792. Schedule site visit at least (3) days in advance.

3.3 The electrical engineer and any subcontractors shall become familiar with and obey all Support Center regulations.

3.4 Cost Estimate: The A/E shall prepare preliminary estimate for recommended upgrades of the existing base-wide power distribution system. Cost Estimates shall be appropriately detailed per USCG standards as outlined in Appendix B, Criteria for project cost estimates.

3.5 Report: Report shall be technically accurate, fully detailed, clear, concise, coordinated, and complete. Report shall include narratives, drawings, calculations, cost estimates to clearly and concisely convey project requirements indicated. Report shall be bound.

The report shall provide a minimum of the following:

- Description of the investigation procedures, methods and equipment used.

- Description of findings.

- Description of required or recommended upgrades and associated cost estimates.

- Calculations of the existing Feeder 1 and 2 demand loading including total capacity, and spare capacity available for any future expansion.

- Recommendations on any upgrades required, based on the survey findings.

3.6 Drawings: The A/E shall prepare an updated one line diagram of the base-wide, 15 KV power distribution system.

3.7 Services for Electrical Sub-Contractor’s Field Work:

3.7.1 The A/E shall employ the services of the electrical contractor to provide and install digital demand meters with recording capabilities on the secondary side of all transformers serving various buildings as defined in the scope of work developed by the A/E. The recording will be performed for a minimum of one week, with an optional second week. The electrical contractor will furnish the recording results to the A/E to be incorporated into the report and used as a base for the evaluations and recommendations.

4. OBJECTIVE

4.1 The objective of this report is to evaluate and document the condition of the existing power distribution system, identify deficiencies, discuss viable alternatives to replace/upgrade the existing high voltage feeders, discuss methods to perform upgrades, impact of upgrades on the site, etc., and statement of probable construction cost. The study will provide detailed survey of the entire existing electrical power distribution, measure current loading on the secondary side of the existing transformers, and provide evaluation of the power distribution system and its capacity and condition.

4.2 The primary objective of this study is to determine if the existing high voltage feeders have sufficient capacity to accept additional loads as the load requirements change.

This report will outline the existing conditions and loading of each feeder, current expansion capacity available and recommendations for the upgrade of the power distribution system to allow for future growth to allow the USCG to plan for any future expansion.

4.3 Major long term upgrade planned for this facility is the replacement of the existing 270’ Cutters with new 360’ Cutters which will place a larger burden on the existing power distribution system.

5. APPROACH

5.1 URS compiled data in the following manner:

5.2 Original Design Data - original site plan and single line diagram drawings were obtained and reviewed.

5.3 Site visits were performed to:

1. Visually inspect the existing power distribution system, locations of the existing transformers and low voltage switchgear and determine the best location for placement of the demand meters..

5.4 Electric energy consumption and demand meters were installed on all transformers (Amprobe DMIII).

5.5 The following measurements were performed:

1. Energy consumption and peak loads on all 13.2 KV to 480/277 volt and 208/120 volt transformers.

5.6 The following items are not addressed in this report:

1. Condition and loading of the primary overhead 35KV cables from the Utility pole to the Utility transformer.

2. Condition and loading of the primary underground 15KV cables from the Utility transformer

6. BACKGROUND-DESCRIPTION OF EXISTING CONDITIONS

6.1 The existing site electrical distribution system consists of:

• High voltage power line from the Virginia Power Company to a pad mounted transformer outside of the station fence line.

• Utility owned step down transformer with 13.2 KV secondary.

• One set of underground 15KV feeders (500Kcmil) from transformer secondary to the USCG owned high voltage distribution switchgear. The high voltage switchgear consists of the main disconnect breaker, metering section, three secondary breaker disconnects serving Feeder 1, Feeder 2 and the third is fully equipped spare.

• A network of duct-banks and manholes throughout the site serving individual step-down transformers.

• Existing feeders are sized at 4/0 AWG and are XLP type. Capacity of each feeder is 230 Amps.

• Service to each building is by one of the 22 indoor or outdoor substations or a pad mounted transformers serving the indoor main distribution panel.

• The transformer secondary voltages are either 480/277 Volts or 208/120 Volts depending on the size of the service or load served.

• The current distribution arrangement is approximately balanced between Feeder 1 and Feeder 2.

• Each of the two feeders was designed to carry the entire load.

• Each of the two feeders has a high voltage sectionalizing switch.

General arrangement of the current power distribution system is shown on the single line diagram and site plan in the Appendix A.

7. ELECTRICAL SYSTEM EVALUATION

7.1 Information furnished to URS consisted of the current single line diagram, feeder summary sheet, site plan and a copy of electric billing statement for the period of September 2006 through August 2009. The calculated demand for the entire site will be compared with the maximum demand obtained from the billing statement.

7.2 Electrical Measurements and Findings: Initial review of the existing power distribution was conducted based on the single line diagrams and transformer summary sheets provided by USCG engineer. A kick-off meeting was held at the base with the electrical contractor and base engineers to review the scope of work. During the meeting it was determined that an additional transformer located in the Main Switchgear Building should be measured (not listed in the original transformer summary sheets Appendix D). At the same time it was decided that the measurement will not be performed at the south pier substation #10 since there were no cutters present.

7.3 A field survey of all transformers was conducted at the conclusion of the meeting to determine the best possible location for the installation of the measuring equipment.

7.4 An electrical contractor was contracted by URS. MET Electrical Testing, LLC performed the measurements utilizing the Amprobe DMIII Multi Test meter (Appendix C).

7.5 Due to the number of measuring points the task was divided into two groups of eleven transformers each. The test meters were installed on the secondary each transformer and the measurements were taken for a period of one week. Measurements were taken in 15 minute intervals.

7.6 In addition to the measuring results, URS was given access to the web site showing the existing metering present at a number of substations. ModHopper transmitters are present at about 15 out of 22 locations monitoring and totalizing the daily usage of energy. These devices have been installed and are used for sub mitering of electrical power and demand usage. This data is available by accessing the web site www.obvius.com. This web site was used to obtain data for the South Pier energy usage from earlier time when the Cutters were present at the dock and the Substation was fully loaded.

7.7 The original Amprobe data, also shown in the Excel spreadsheets, was obtained from the Contractor and will be turned over to USCG during final submission. The program required to manipulate this data is available free from Amprobe website.

http://www.amprobe.com/softwaredownloads.html#Software

7.8 Measurement data was totalized in Excel spreadsheets. The printouts of the electrical measurements show electrical loading of each transformer for the measuring period (Appendix G). This data was also represented in graph format (Appendix F). A separate spreadsheet was provided showing the maximum demand at each location.

This information was used to update the Feeder Summary Sheet.

7.9 The results of the loading measurement yield the following results

1. Feeder 1 and Feeder 2 are not equally loaded. Maximum capacity of each feeder is 230 Amps. Feeder 1 is loaded to 55.7 Amps or 24 percent of capacity. Feeder 2 is loaded to 135.9 Amps or 59 percent of capacity. A combined load of Feeder 1 and 2 when carried on one feeder is 191 Amps or 83 percent capacity. This leaves only 17 percent of spare capacity for future expansion.

2. Feeder C2CEN #4 was recorded as being overloaded (a 225 KVA transformer was found to be loaded to 259 KVA about mid-day). However, currently there is a project under construction (Project 587250, Drawing 7569-D) to provide a new 1000 KVA transformer and transfer some of the C2CEN loads to the new distribution.

3. The existing underground feeder cables for Feeder 1 and Feeder 2 duct-banks are 15 KV, XLP type. Some of the newer installations consisted of 15 KV EPR cables.

7.10 Results of the measurements are tabulated and attached in Appendix G.

7.11 Cross linked polyethylene cable (XLP) technology has progressed through three generations of cable, each of which was relatively unreliable as a result of a phenomenon known as "water treeing". This phenomenon results in the growth of a tree-like pattern of water penetration into the insulation which lowers the electrical strength of the cable and eventually results in premature failure. Ethylene-propylene rubber cable (EPR) is relatively immune to the water treeing phenomenon, and has provided reliable service for over 30 years.

1. The base polymer of EPR cable was first developed in the early 1960’s can vary in crystallinity, chemistry, etc. As the base resin is too soft for direct application in cable, a range of fillers, dominated by highly refined clay, is employed to achieve the required mechanical and electrical properties. EPR cable compound is highly stable chemically and thermally, and EPR-based cables can be rated at temperatures of 140 to 150 C.

2. EPR-based cable insulation has much greater resistance to the degrading effects of corona and partial discharge, which also contributes to the high reliability of EPR cables.

7.12 An article with explanation of the difference between XLP and EPR cables is attached in the Appendix I.

8. RECOMMENDATIONS

8.1 System capacity:

1. The existing power distribution system capacity is currently adequate for the existing buildings and loads connected. However, there is very little spare capacity for any considerable future growth.

2. The majority of the existing high voltage cable is XLP type which is susceptible to treeing effect which diminishes its electrical strength. These cables should be replaced with new EPR cables to avoid any future problems that may develop due to the treeing effects common to XLP cable insulation.

3. The Dominion Electric billing record from the USCG indicates maximum demand of 3349 KWD (147 Amps at 13.2 KV) while the metered results obtained indicate maximum demand of 4377 KWD (191 Amps at 13.2 KV). The difference in total demand is due to the fact that all of the metered result peaks do not occur at the same time (measurements taken at different times), while the Utility demand meter records maximum demand peak at any given moment as a combined value.

8.2 Capacity expansion

1. The first issue with the existing power distribution is the balancing of the two feeders during normal operation. Feeder 1 maximum demand load is about 55 Amps and Feeder 2 maximum demand load is about 135 Amps. Based on the demand load reading the easiest way to balance the two feeder loads is to transfer Substation #10 - South Pier (approximate demand of 43 Amps) from Feeder 2 to Feeder 1. This arrangement will increase Feeder 1 demand load from 55 Amps to about 98 Amps and reduce Feeder 2 load from 135 Amps to about 92 Amps.

2. In order to increase the power distribution capacity, the existing 4/0 cables should be replaced with new 350 Kcmil, EPR cables. This will increase the capacity of each Feeder from 230 Amps to 310 Amps per feeder.

3. The increased cable size will provide an additional 80 Amps spare capacity if the entire site was operating on one feeder (worst case).

4. The high voltage cables can be replaced in phases to keep any downtime to a minimum.

5. First group of cables to be replaced should be from sectionalizing switch 9B to Substation 18 (Industrial Building) which would include Substations # 10, 20, 11A, 11, 12 and 18. The length of this run should be transferred to Feeder 1 while Feeder 2 is replaced. During this work Feeder 2 should be provided from Manhole 18 to Substation 12 as this Substation is only connected to Feeder 1. At the completion of this feeder replacement the Substations listed should be transferred to Feeder 2 while Feeder 1 is being replaced. The new cables should be 3 individual conductors, 350 Kcmil type EPR.

6. The second set of cables: from sectionalizing switch 9A and 9B and should include Substations 14, 16 and transformer serving Hobby Shop. Again, as above, one feeder at a time should be replaced while transferring the loads to the opposite feeder.

7. The third set of cables: from Manhole 12 and should include Enlisted Club transformer, Community Service transformer, and Sector Trailers transformer following the same sequence as in previous descriptions.

8. The fourth set of cables: from Manhole 3 and should include Dive Trailers transformer, Admin Building transformer, and Command/Medical transformer.

9. The fifth set of cables: from Manhole 4 and should include Substation 4A, and C2CEN transformer.

10. The sixth set of cables: from Manhole 3 and should include portion to sectionalizing switch 3, and Security Building including the section from the Switchgear Building to Manhole 3.

11. After replacement of all of the high voltage cables the settings on the Main Switchgear Feeder Breakers serving feeder 1 and Feeder 2 should have the trip setting changed for the new feeder size. A relay coordination study is recommended. Existing current transformers (CT’s) in the switchgear cubicles may need to be replaced with larger ration CT’s.

12. The Main high Voltage Switchgear contains a fully equipped, third circuit breaker for additional feeder connection. This spare circuit breaker could be used to provide an entirely new feeder (Feeder 3) for any future and larger expansion (addition of new Cutters). This arrangement could provide an additional 310 Amps of expansion capacity but would be limited to one feeder for the new loads.

Feeder 1 and 3 could be used as primary feeders with feeder 2 being used as a secondary feeder to both primary feeders. Balancing the load between the three feeders would allow for operation of the entire site with added loads, and provide required reliability by providing the provision for backup feeders, as currently arranged.

13. The upgrade of the existing Feeders can be done in two phases. Replacement of the existing Feeder 1 and Feeder 2 can be done as phase 1, providing the added capacity and reliability to the power distribution system and allowing for the general building expansion. Since the upgraded Feeders 1 and 2 will not have the adequate capacity for the additional load required by the new Cutters, Feeder 3 can be added at a future date, closer to the acquisition of the new Offshore Patrol Cutters.

14. The remaining issue is the existing 500 Kcmil primary cable from the utility transformer to the High Voltage Switchgear. While the capacity of the cable is adequate for any new load addition, the fact that is a single point of connection presents a problem of loosing power to the entire base. These cables should also be replaced with two sets of parallel cables of equal size, assuring a backup in case one of the two sets fails.

15. Beyond this point not much can be done to assure reliable service to the site.

Single overhead, 35 KV feeder and single pad-mounted utility transformer will always remain as possible single point of failure.

9. STATEMENT OF PROBABLE COST

Probable cost estimate is based on the prices obtained from the “2008 RSMeans Electrical Cost Data” book. Each feeder replacement was estimated separately to allow for flexibility in construction schedule and construction budget.

See Appendix H for probable cost calculations.

APPENDIX A

� DRAWINGS

APPENDIX B

� UTILITY BILLING STATEMENT

APPENDIX C

� METERING EQUIPMENT USED

Copyright Amprobe 2005

D M

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M u lt iT e s t U s e r’ s M a n u a l

AMPROBE DMIII MULTITEST

EN-1

INDEX

1. SAFETY PRECAUTIONS AND PROCEDURES

1.1. Forwards

1.2. Preliminary Instruction

1.3. During Use

1.4. After Use

2. GENERAL DESCRIPTION

2.1. Introduction

2.2. Functions

3. PREPARATION FOR USE

3.1. Initial Control

3.2. Power Supply

3.3. Calibration

3.4. Storage

4. INSTRUMENT DESCRIPTION

4.1. Display Description

4.2. Initial Screen

4.3. Backlight function

5. INITIAL SETTINGS

5.1. How To Adjust The Contrast

5.2. How To Set Date And Time

5.3. How To Set The Language

5.4. How To Adjust The Country

5.5. RESET

6. SAFETY TEST FUNCTIONS

6.1. LOW!: Continuity Test with 200mA Test Current

6.1.1. Calibrating the test leads ("CAL" Mode)

6.1.2. Measurement Procedure

6.1.3. Results of "AUTO" mode

6.1.4. Results of "RT+" and "RT-" modes

6.1.5. "AUTO", RT+", "RT-" faulty cases

6.2. INSULATION TEST: Insulation Resistance Measurement

6.2.1. Measurement Procedure

6.2.2. Results of "MAN" mode

6.2.3. Results of "TMR" mode

6.2.4. "MAN" and "TIMER" mode faulty cases

6.3. : Phase Sequence Indicator

6.3.1. Measurement procedure and results of " " mode

6.3.2. Faulty Cases

6.4. GROUND TEST: Soil Resistance and Resistivity Measurements

6.4.1. Measurement procedure and results of "2-W"and "3-W" mode

6.4.2. Measurement procedure and results of """ mode

6.4.3. "2-W", "3-W" and """ faulty cases

7. POWER QUALITY

7.1. Basic Setting: ANALYZER CONFIG

7.1.1. Type of electrical system under test

7.1.2. How to set the fundamental frequency

7.1.3. How to set the Clamp Type

7.1.4. How to set the current range

7.1.5. How to set the value of the transformer voltage ratio (TV RATIO)

7.1.6. How to enable/disable the password

7.2. Basic Setting: RECORDER CONFIG

7.3. POWER QUALITY FUNCTIONS

EN-2

7.4. "VOLTAGE" function

7.4.1. Symbols

7.4.2. "METER" mode

7.4.3. "HARM" mode

7.4.4. "WAVE" mode

7.5. "CURRENT" function

7.5.1. Symbols

7.5.2. “METER" mode

7.5.3. “HARM" mode

7.5.4. "WAVE" mode

7.6. "POWER" function

7.6.1. Symbols

7.6.2. "METER" mode

7.6.3. "WAVE" mode

7.7. "ENERGY" function

7.7.1. Symbols

7.7.2. "METER" mode

8. MEASURING PROCEDURES

8.1. Using the instrument in a single-phase system

8.2. Using the Instrument in a three-phase 4-wire system

8.3. Using the Instrument in a three-phase 3-wire system

9. SAVING RESULTS

9.1. Saving Safety Test Results

9.2. Saving Displayed Values of POWER QUALITY Function

10.RECORDINGS

10.1. Start A Recording

10.2. During A Recording

10.2.1. MENU key

10.2.2. Rotary Switch during a recording

10.3. Stopping a Recording / Energy Measurement

11.INSTRUMENT'S MEMORY

11.1. SAFETY TEST MEMORY

11.2. ANALYZER MEMORY

12.CONNECTING THE INSTRUMENT TO A PC

13.MAINTENANCE

13.1. General Instruction

13.2. Battery Replacement

13.3. Instrument Cleaning

14.TECHNICAL SPECIFICATIONS

14.1. Technical Features

14.1.1. Safety Test functions

14.1.2. POWER QUALITY function

14.2. Standards

14.2.1. General

14.2.2. Safety Test

14.2.3. POWER QUALITY

14.3. General Specifications

14.3.1. Mechanical Data

14.3.2. Power supply

14.3.3. Display

14.3.4. Memory

14.4. ENVIRONMENT

14.5. ACCESSORIES

15.SERVICE

15.1. WARRANTY CONDITIONS

15.2. SERVICE

16.PRACTICAL REPORTS FOR ELECTRICAL TESTS

EN-3

16.1. Continuity Test On Protective Conductors

16.2. Check of the Circuit Separation

16.3. Measurement Of Floor Insulation Resistance In Medical Rooms Cei 64-4

16.4. Ground Resistance Measurement

16.5. Ground Resistivity Measurement

16.6. Voltage Anomalies (Voltage Sag and Surge)

16.7. Voltage and current Harmonics

16.7.1. Theory

16.7.2. Limit values for harmonics

16.7.3. Presence of harmonics: causes

16.7.4. Presence of harmonics: consequences

16.8. Power and Power Factor definition

16.8.1. Conventions on powers and power factors

16.8.2. 3 Phase 3 Wire System

16.9. Measuring Method: outlines

16.9.1. Integration periods

16.9.2. Power factor calculations

16.9.3. Voltage Anomalies and Periods Analysis comparison

17.APPENDIX 1 – MESSAGES DISPLAYED

18.APPENDIX 2 – RECORDABLE PARAMETERS: SYMBOLS

Release EN 1.00 of the 31/06/2005

EN-4

1. SAFETY PRECAUTIONS AND PROCEDURES

1.1. FORWARDS

This instrument conforms to the safety standards EN61557 and EN 61010-1 relating to electronic measuring instruments.

WARNING

For your own safety as well as that of the instrument you are recommended to follow the procedures described in this instruction manual and carefully read all the notes preceded by the symbol .

Strictly adhere to the following instructions before and during measurements:

Do not measure voltage or current in wet or dusty places;

Do not measure in presence of gas, explosive materials or combustibles;

Do not touch the circuit under test if no measurement is being taken;

Do not touch exposed metal parts, unused terminals, circuits and so on;

Do not effect any measurement in case of unusual conditions of the instrument such as deformation, breakage, leakage of substances, absence of display reading etc;

Do not use the External power supply adapter (code DMT-EXTPS) if you notice deformation, or breakage in the case, in the wire or in the plugs;

Pay careful attention when measuring voltages exceeding 25V in particular places

(building yards, swimming pools, etc.) and 50V in ordinary places because of the risk of electric shock;

Use only cables and accessories approved by Amprobe;

The following symbols are used in this manual:

Caution: refer to the instructions in this manual; improper use may damage the apparatus or its components.

#$ AC Voltage or Current.

Unidirectional pulsating Voltage or Current.

Rotary switch of the instrument.

1.2. PRELIMINARY INSTRUCTION

This instrument has been designed for use in environments with a pollution level 2 and up to (and no more than) 2000 meters altitude.

It can be used for Safety Test on Installation with Over voltage Category III 300V~ (phase to earth) and for voltage and current measurements on installations with over voltage category III 600 V~ phase-to-phase / 300 V~ phase to earth or CATII 350 V phase to earth.

EN-5

Please keep to the usual safety standards aimed at:

% Protecting against dangerous currents;

% Protecting the instrument against incorrect operations.

Only the accessories supplied with the instrument guarantee compliance with the safety standards. Accordingly, they must be in good conditions and, if necessary, they must be replaced with identical models.

Do not take measurements on circuits exceeding the specified current and voltage limits.

Before connecting cables, alligator clips and clamps to the circuit under test, make sure that the right function has been selected.

Do not take any measurements under environmental conditions beyond the limits specified in paragraph 14.4.

Check that batteries are not weak and are installed correctly.

Before connecting test leads to the circuit under test, check that rotary switch position is correct.

1.3. DURING USE

Please read the following recommendations carefully and instructions:

WARNING

Non-compliance with the Warnings and/or Instructions may damage the apparatus and/or its components or injure the operator.

Before selecting any function disconnect the test leads from the circuit under test.

When the instrument is connected to the circuit under test do not touch any unused terminal.

Avoid taking resistance measurements in the presence of external voltages; even though the instrument is protected, a high voltage may cause malfunctions.

When measuring current, other currents located near the leads may affect the measuring accuracy.

When measuring current, always position the wire in the middle of the jaws in order to obtain the highest accuracy.

A measured value remains constant if the "HOLD" function is active. Should you notice that the measured value remains unchanged, disable the “HOLD” function.

WARNING

The symbol " " shows the battery charge: When it is completely black the batteries are full charged, while the " " symbol indicates weak batteries.

When the batteries are too low to execute a test, the instrument will show a warning message.

In this case, interrupt testing and replace batteries, following the procedure described in paragraph 13.2. The instrument is capable of keeping the data stored even though batteries are not installed. The Instrument Date and Time settings aren't lost if you change the batteries within 24hours.

1.4. AFTER USE

& After use, turn off the instrument by pressing & holding ON/OFF for a few seconds.

& Remove batteries when the apparatus remains unused for long periods. Please follow the storage instructions described at paragraph 14.4.

EN-6

2. GENERAL DESCRIPTION

2.1. INTRODUCTION

Dear Customer, we thank you for your patronage. The instrument you have just purchased will grant you accurate and reliable measurements provided that it is used according to the present manual’s instructions.

The instrument was designed to grant the user the utmost safety conditions thanks to a new concept assuring double insulation and over voltage category III.

2.2. FUNCTIONS

The instrument is able to perform the following tests:

LOW!: Continuity Test of Protection and Equalising conductors with a test current higher than 200mA and open circuit voltage ranging from 4V to 24V.

INSULATION TEST: Measurement of insulation resistance with DC test voltage 50V, 100V, 250V, 500V or 1000V.

: Indication of phase rotation sequence

GROUND TEST Measurement of Ground Resistance and Resistivity using Earth rods.

POWER QUALITY: The Instrument allows the following operations:

! Display in real time the electrical parameters of a single-phase and three-phase systems and the harmonic analysis of voltage and current.

! Conduct a direct Energy measurement (without memorizing).

! Memorize (by pressing the SAVE key) the sampled values of the

Parameters present at instrument input generating a "Smp" record inside instrument memory. It will be possible to analyze the memorized data ONLY by transferring it to a PC.

! Record simultaneously (pressing the START key after a proper set up): RMS values of voltages, currents, corresponding harmonics, active, reactive and apparent powers, power factors and cos', active, reactive and apparent energies, voltage anomalies (voltage sag and surge) with 10ms resolution. It will be possible to analyze the recorded data ONLY by transferring them to a PC.

WARNING

Please note the difference between memorize and record. These terms will be used repeatedly in this manual. Please focus on their definitions and distinctions.

EN-7

3. PREPARATION FOR USE

3.1. INITIAL CONTROL

This instrument has been checked mechanically and electrically prior to shipment.

Care has been taken to ensure that the instrument reaches you under safe conditions.

You are recommended, however, to carry out a rapid check to detect any possible damage, which might have been caused during transport. Should this be the case, immediately contact Amprobe.

Also, check that the packaging contains all the parts listed under paragraph 14.5. In case of discrepancies contact the dealer.

In case you have to send the instrument back please follow the instructions reported in paragraph 15.

3.2. POWER SUPPLY

The instrument can be powered by:

! 6 batteries 1.5V AA series located in the compartment on the back of the instrument (not included in the package). For battery life see paragraph 14.3.2.

! An external power supply adapter (code DMT-EXTPS) to be used only for POWER QUALITY functions. We recommend that you use only DMT-EXTPS Amprobe Power Supply adapter.

For your own safety you’re not able to use the external power supply adapter during

Safety Test (LOW!, INSULATION TEST, ,GROUND TEST rotary Switch positions).

If you press the START button the Instrument will show the message "( REMOVE

POWER".

The symbol shows the battery charge: If it is completely "black" the batteries are fully charged, while the symbol indicates weak batteries. When the batteries are too low to execute the test the instrument will show a warning message. In this case interrupt testing and replace the batteries following the procedure described in paragraph 13.2. The instrument is capable of keeping the data stored even though batteries are not installed.

The Instrument Date and Time settings aren't lost if you change the batteries within 24hours.

EN-8

WARNING

For recordings (POWER QUALITY function) ALWAYS use the external power supply adapter (code DMT-EXTPS) even the instrument allows the operator to perform a recording using internal batteries. If during a recording the external power supply adapter is de-energized, the instrument will continue the recording using the internal battery power until the batteries are exhausted (the data stored up to the point the instrument shuts down won’t get lost). Because of this we recommend you ALWAYS insert a new set of batteries before a long recording.

The instrument uses sophisticated algorithms to prolong the battery life. Specifically:

! The instrument switches OFF the backlight Automatically after 5 seconds.

! If the instrument is displaying in real time (and the external power supply adapter is not connected), after about 5 minutes from the last key press or switch rotation the instrument turns off automatically ("AUTOPOWER OFF" procedure).

! If the instrument is recording or is measuring energy (and the external power supply is not connected), after about 5 minutes from the last key press or switch rotation the instrument starts a special procedure to save the batteries ("ECONOMY MODE"): the instrument keeps recording but the display is turned off.

3.3. CALIBRATION

The instrument fulfils the technical specifications listed in this manual. The performance of the specifications is guaranteed for one year.

3.4. STORAGE

In order to maintain the accuracy of the measurements, after a period of storage in extreme environmental conditions, wait the necessary time for the apparatus to return to normal operating conditions (see environmental specifications listed in paragraph 14.4).

EN-9

4. INSTRUMENT DESCRIPTION

SAVE

F1 F3 F4F2

HOLD

ENTER

MENU ESC

START

STOP

LEGEND:

1. Display

2. Function Keys

3. Rotary switch

Front panel of the Instrument

Multifunction Keys.

ON/OFF and backlight key. Press it for few seconds to switch OFF the instrument, press it briefly to activate the backlight function.

This key starts (and stops) the measurements.

This key saves the result displayed.

This key has 2 functions: it is the confirmation key inside the configuration menu and it freezes the displayed results using the POWER QUALITY function.

This key opens the General Configuration Menu.

This key cancels modification in the configuration menus or the selected working modes.

F1

START

STOP

HOLD

ENTER

MENU

F2 F4F3

ON/OFF

SAVE

ESC

EN-10

4.1. DISPLAY DESCRIPTION

The display is a graphic module with a resolution of 128 x 128 pixels The first line of the display shows date and time. If not correct, you can set the exact ones according to the procedure described at paragraph 5.2.

On the top right corner of the display you can always see the battery indicator and, if the external power supply adapter (code DMT-EXTPS) is connected, the corresponding symbol.

LOW! 05.06.01 27.09.00 17:35:12

R+ R-

---mA ---mA

AUTO 0.11!

SINGLE PHASE

VOLTAGE

V1 = 230.2 V Vpk1 = 325.5 V ThdV = 0.0 % freq = 50.0 Hz

FUNC CAL HARM WAVE

These symbols will be omitted in the following illustrations.

4.2. INITIAL SCREEN

When turning on the instrument by pressing ON/OFF, this screen will appear for a few seconds:

DMIII

Multitest

AMPROBE

SN:00000000 V: X.XX

BAUD RATE 57600

Here you can see:

& Serial number of the instrument (SN.:)

& Firmware software release (V.X.XX:)

& Transmission speed through serial RS232 (Baud Rate)

4.3. BACKLIGHT FUNCTION

When the instrument is turned on, pressing, briefly, the ON/OFF button, the backlight will be enabled. The light will be automatically turned off after 5 seconds.

If the batteries are too low the instrument will automatically disable the backlight function.

EN-11

5. INITIAL SETTINGS

By pressing the MENU key the following screen will be displayed:

It’s not possible to enter the MENU during a recording or a Real Time Energy measurement. Pressing this button during a recording will display the main recording parameters (see paragraph 10.2).

5.1. HOW TO ADJUST THE CONTRAST

By pressing the multifunction keys F1 and F2, position the cursor on the CONTRAST item and then press the ENTER key.

By pressing the multifunction keys F3 and F4, adjust the contrast (higher values correspond to a higher contrast while lower values correspond to a lower contrast) and press the ENTER key to SAVE the change or press ESC to quit the modification.

This setting will remain unchanged after turning off the instrument.

5.2. HOW TO SET DATE AND TIME

By pressing the multifunction keys F1 and F2, position the cursor on the DATE&TIME item and then press the ENTER key.

The time is expressed as hh:mm (2 digit for hours, 2 digit for minutes) military time.

Press the ENTER key to SAVE the change or press ESC to quit the modification.

This setting will remain unchanged after turning off the instrument.

5.3. HOW TO SET THE LANGUAGE

By pressing the multifunction keys F1 and F2, position the cursor on the LANGUAGE (EN) or LINGUA (IT) item and confirm it by pressing the ENTER key.

By pressing the multifunction keys F1 and F2, position the cursor on the desired language and press the ENTER key to SAVE the change or press ESC to cancel the modification.

This setting will remain unchanged after turning off the instrument.

5.4. HOW TO ADJUST THE COUNTRY

By pressing the multifunction keys F1 and F2, position the cursor on the COUNTRY item and confirm it by pressing the ENTER key. By pressing the multifunction keys F1 and F1, select the Country among the following possibilities:

UE_m: European Countries: Distance setting in "meter" for Resistivity measurement Date format DD/MM/YY

US_m: United States: Distance setting in "meter" for Resistivity measurement Date format MM/DD/YY

US_ft: United States: Distance setting in "feet" for Resistivity measurement Date format MM/DD/YY

Press the ENTER key to SAVE the change or press ESC to quit the modification.

This setting will remain unchanged after turning off the instrument.

MENU GENERAL

SAFETY TEST MEMORY

ANALYZER MEMORY

RESET

ANALYZER CONFIG

RECORDER CONFIG

CONTRAST

DATE&TIME

LANGUAGE

COUNTRY

EN-12

5.5. RESET

This option re-establishes the default settings of the instrument.

! ANALYZER CONFIG:

Type of electrical equipment: Three Phase 4 wires Frequency: not modified Clamp full scale: not modified Clamp type: not modified Transforming ratio of voltmetric transformers: 1 Password: disabled

! RECORDER CONFIG:

Start: manual (the recording is started at 00 sec mark on clock after pressing

START/STOP)

Stop: manual Integration period: 15min Recording of harmonics: ON Recording of voltage anomalies (sags and surges): ON Voltage reference for detection of sags and surges: 110V Upper limit for detection of sags and surges: 6% Lower limit for detection of sags and surges: 10% Selected voltages: V1, V2, V3 Selected voltage harmonics: THD, 01, 03, 05, 07 Selected currents: I1, I2, I3, IN Selected current harmonics: THD, 01, 03, 05, 07

CO-GENERATION: OFF

Selected powers, Pf and cos': Pt, P1, P2, P3 Qti, Q1i, Q2i, Q3i Qtc, Q1c, Q2c, Q3c St, S1, S2, S3 Pft, Pf1, Pf2, Pf3 dpft, dpf1, dpf2, dpf3 Energies: Eat, Ea1, Ea2, Ea3 Erit, Eri1, Eri2, Eri3 Erct, Erc1, Erc2, Erc3 Est, Es1, Es2, Es3

The RESET command will not erase the instrument’s memory.

APPENDIX D

� PRIMARY FEEDER SUMMARY SHEET

PROJECT 2709586 ELECTRICAL SYSTEM POWER DISTRIBUTION EVALUATION January 27, 2010

Primary Feeder Summary SheetEquipment #Equipment #Equipment #Equipment # DescriptionDescriptionDescriptionDescription AMPS AMPS AMPS AMPS Single Single Single Single PhasePhasePhasePhase AMPS 3

Phase

Total

Connected

Load

Max

Demand

KVA

Max

Demand

Current

Metered at nearest building not at transformer

Notes

1 11978 SUB-STA #20 (Supply - Prim. Volt 13200, Sec. Volt 277/480, 500KVA) 38 22 500 85 3.7 No

2 11975 SUB-STA #11(North Pier - Prim. Volt 13200, Sec. Volt 277/480, 1500KVA) 38 22 1500 398 17.4 Yes

3 11976 SUB-STA #11A (Nesu & Boat House-Prim. Volt 13200, Sec. Volt 277/480, 2500KVA) 190 109 2500 452 19.8 Yes

4 11986 SUB STA #12 Sandblast (Prim. Volt 13200, Sec. Volt 277/480, 750 KVA) 57 33 750 201 8.8 Yes Feeder #1 Only

5 11990 Hobby Shop/1st LT (Prim. Volt 13200, Sec. Volt 120/208, 225 KVA) 17 10 225 16 0.7 No

6 11989 Community Services Building (Prim. Volt 13200, Sec. Volt 277/480, 500 KVA) 38 22 500 121 5.3 NoConnected to Feeder #1 12/7/08 378 218 5975 1273 55.7Equipment #Equipment #Equipment #Equipment # DescriptionDescriptionDescriptionDescription AMPS AMPS AMPS AMPS Single Single Single Single AMPS 3

Phase

Notes

7 11977 SUB-STA #10(South Pier - Prim. Volt 13200, Sec. Volt 277/480, 1500 KVA) 114 66 1500 993 43.5 Yes

8 11979 SUB-STA #16 (Group Build.- Prim. Volt 13200, Sec. Volt 277/480 750 KVA) 57 33 750 306 13.4 No

9 11980 Admin Building - (Prim. Volt 13200, Sec. Volt 120/208, 750 KVA) 57 33 750 86 3.8 No

10 11981 C2CEN #4 (Prim. Volt 13200, Sec. Volt 480/277, 225 KVA, dry type) 17 10 225 259 11.3 Yes

11 11982 C2CEN (South Side, Prim. Volt 13200, Sec. Volt 277/480, 500KVA) 38 22 500 237 10.4 Yes

12 11983 #3 Security/Armory (Prim. Volt 13200, Sec. Volt 120/208, 112.5 KVA) 8.5 5 112.5 25 1.1 Yes Feeder #1 is opposite rotation, needs adjusting

13 11984 SUB STA #14 Uph/Galley(Prim. Volt 13200, Sec. Volt 277/480, 500 KVA) 38 22 500 142 6.2 Yes

14 11985 CMP Building (Prim. Vol 13200, Sec. Volt 277/480, 1000 KVA) 75 43 1000 545 23.9 Yes

15 11987 SUB STA #18 Industrial (Prim. Volt 13200, Sec. Volt 277/480, 1000 KVA) 75 43 1000 209 9.2 Yes

16 11988 Command/Medical (Prim. Volt 13200, Sec. Volt 120/208, 225 KVA) 17 10 225 99 4.3 Yes

17 11991 #21 Club (Prim. Volt 13200, Sec. Volt 277/480, 225 KVA) 17 10 225 64 2.8 Yes Feeder #1 is opposite rotation, needs adjusting

18 22391 C2Cen Trailers Transformer (Prim. Volt 13200, Sec. Volt 120/208, 225 KVA) 17 10 225 69 3.0 Yes

19 740252 C2Cen Training Aid Transformer (Prim. Volt 13200, Sec. Volt 120/208, 150 KVA) 11 6.5 150 6 0.3 No

20 740253 Sector Trailers Transformer (Prim. Volt 13200, Sec. Volt 120/208, 150 KVA) 11 6.5 150 12 0.5 Yes

21 5006 MSST Dive Locker Transformer (Prim. Volt 13200, Sec. Volt 120/208, 225 KVA) 17 10 225 20 0.9 Yes

22 Main Switchgear Bldg Pri 13200 V, 208/120V, 112.5 KVA 8.5 5 112.5 32 1.4Connected to Feeder #2 12/7/08 578 335 7650 3104 135.9

Power Bill Information

Pk Demand KW 3349

RKVA 2154

Total 13625 KVA 4377 KVA

Pk Demand 2721

RKVA 1420

3/0 XLP conductor ampacity = 230 Amps Load Reserve % Spare Capacity

Feeder 1 55.7 A 174.3 A 76 %

Feeder 2 135.9 A 94.1 A 41 %

Full Load on one Feeder 191.7 A 38.3 A 17 %

PROJECT 2709586 ELECTRICAL SYSTEM POWER DISTRIBUTION EVALUATION JANUARY 27, 2010

New Cutter Loading Summary SheetNumber of Number of Number of Number of Cutters (A)Cutters (A)Cutters (A)Cutters (A) Current Current Current Current Each Cutter Each Cutter Each Cutter Each Cutter (A)(A)(A)(A) Current @

480 Volts

(A)

Current at

13.2KV (A)

New Cutters 360' 6 2400 14400 524

Existing Cutters 270' 8 800 6400 233

Load added to the existing power distribution 291

Capacity of the Feeder

(A)

Current

Demad load

(A)

Spare Capacity of existing feeder (Amps)

Capacity of the NEW

Feeder (A)

Current

Demad load (A)

Spare Capacity of NEW feeders

(Amps)

Feeder 1 230 98 132 310 98 212

Feeder 2 230 92 138 310 92 218

Additonal Feeder 3 310 310

460 190 270 930 190 740

(1) (2)

(1) Spare capcity of the existing feeders not adequate to accept new Cutters

(2) Additon of third feeder will provide adequate power for the addition of new Cutter

APPENDIX E

� DEMAND METERING FIELD DATA SUMMARY SHEET

Demand Metering Field Data Summary Sheet

Location Date & time

Transformer

Size

RMS

Voltage

RMS

Current Real Power

Apparent

Power

(KVA) Mid (V) Mid Ø1 (A) Mid Ø2 (A) Mid Ø3 (A)

Mid Total

(KW)

Mid Total

(KVA)

1 #20 Supply 10/7/2009 12:59 500 273.3 107.3 108.3 96.81 76.51 85.08

2 Substation 11 10/3/2009 6:50 1500 273.6 500.8 481.3 479.9 317.2 398.3

3 Substation 11A 10/8/2009 7:48 2500 276.1 558.7 528.1 557.4 324.3 452.4

4 #12 Sandblast 10/5/2009 8:02 750 278.3 252.6 247.4 228.8 169.2 201.7

5 Hobby Shop 9/24/2009 16:05 225 117.4 23.75 51.92 68.98 16.32 16.65

6 Community Services 10/2/2009 14:27 500 270.8 155.5 162.1 130.6 110 121.3

7 Substation 10 5/7/2009 1500 796 993

8 #16 Group Bldg. 10/5/2009 5:59 750 275.7 390.1 359.2 362.6 280.9 306.3

9 Admin. Bldg. 9/24/2009 12:38 750 117.3 264.2 228.1 243 79.41 85.90

10 C2 CEN #4 (old side) 9/23/2009 13:27 225 265.3 339 328.2 309.6 234.2 259.3

11 C2 CEN South Side 9/23/2009 12:54 500 267.1 303.5 285.4 298.7 214 236.9

12 #3 Security_Armory 9/25/2009 5:42 112 120 45.26 71.58 95.03 23.5 25.23

13 #14 UPH_Galley 10/4/2009 15:35 500 273.9 187.8 159.8 172.4 125.8 142.2

14 CMP Bldg. 10/2/2009 8:34 1000 269.3 690.8 659.6 674.6 447.9 545.4

15 #18 Industrial 10/6/2009 8:56 1000 266.4 256.9 255.6 259 194.2 209.6

16 Command Medical 9/22/2009 14:14 225 117.2 292.8 294.6 264.4 92.59 99.61

17 #21 Club 10/6/2009 6:09 225 119 211.1 185.2 147 62.48 64.7

18 C2 CEN Trailers 9/24/2009 13:53 225 116.5 182.4 173.5 239.5 67.02 69.25

19 C2 CEN Training Aid 9/29/2009 10:07 150 119.8 30.24 24.49 0 5.926 6.011

20 Sector Trailers 10/7/2009 14:22 150 117.8 57.31 32.7 16.89 11.6 11.84

21 MSST Dvie Locker 9/24/2009 13:19 225 116.6 78.8 99.62 38.56 20.84 20.63

22 112 KVA xfmr. 10/5/2009 14:44 112 275.5 36.95 39.43 43.03 25.65 32.76

Total 13624 3695.55 4384.06

APPENDIX F

� ELECTRICAL MEASUREMENTS GRAPHS

#20 Supply (current)

9/30/2009 1:29:00 PM - 10/8/2009 8:59:00 AM

RMS Current Ø1 Mid (107.30 A, min:37.88 A; max:107.30 A; avg:67.88A)gfedcb RMS Current Ø2 Mid (108.30 A, min:35.54 A; max:108.30 A; avg:56.09A)gfedcb RMS Current Ø3 Mid (96.81 A, min:33.74 A; max:96.81 A; avg:62.70A)gfedcb

Time

12:00:00 AM12:00:00 AM12:00:00 AM12:00:00 AM12:00:00 AM12:00:00 AM12:00:00 AM12:00:00 AM

A

Substation 11 (current)

9/30/2009 1:05:00 PM - 10/8/2009 8:35:00 AM

RMS Current Ø1 Mid (500.80 A, min:12.09 A; max:500.80 A; avg:392.91A)gfedcb RMS Current Ø2 Mid (481.30 A, min:7.86 A; max:481.30 A; avg:371.69A)gfedcb RMS Current Ø3 Mid (479.90 A, min:6.38 A; max:479.90 A; avg:375.90A)gfedcb

Time

12:00:00 AM12:00:00 AM12:00:00 AM12:00:00 AM12:00:00 AM12:00:00 AM12:00:00 AM12:00:00 AM

A

Substation 11A (current)

9/30/2009 12:48:00 PM -…