RFQ_36C26024Q0263_Attachment 1_SOW.pdf

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Scope of Work

Triennial Electrical Distribution System Testing

Project Number 668-22-101 6/09/2022

1) SCOPE

A) Perform complete testing and maintenance of the electrical distribution system throughout the Mann-Grandstaff Veterans Administration Medical Center campus and buildings for all switching equipment and bench testing/calibration of all breakers 250 amps and larger. Breakers 225A and below require manual testing along with an open/continuity test with a meter. New breakers may be substituted at owner’s discretion. Efforts have been made to provide a complete list of components that require testing, however omissions may be present. All existing components shall be inspected and tested as applicable whether or not they are specifically listed within the scope. All work to be accomplished IAW VA Directive 1028 dated Feb 24 2020, and other references listed on section 2.E of this document.

B) Prior to commencement of the testing procedures, the testing firm shall survey, catalog, visually inspect, and perform infrared scan for all components of the facility electrical distribution system.

Provide infrared pictures of problem connections and recommendations for corrections. All new systems that are under contractor warranty and have been placed into service within one year of NTP do not require testing but shall be visually inspected and infrared scanned.

C) Provide an engineering analysis, short circuit study, coordination study, and arc flash study in accordance with NFPA 70E and VHA Directive 1028 for the entire campus electrical system. Label all components (panels, transformers, and MV switches), including weatherproof labels for all exterior equipment on both the interior and exterior of the doors that will remain legible for a minimum of three years.

D) Provide a preliminary report including infrared test results, visual inspection results and repair recommendations. Any accessible bolted connections noted for correction during infrared are to be re-torqued to manufacturers specifications with a calibrated torque wrench during contractors follow-on visit.

E) All work shall be conducted between the hours of 6:00 pm and 6:00 am, Monday thru Friday and from 6:00 am Saturday thru 6:00 am Monday. In critical areas of the hospital such as radiology (x-ray rooms, MRI, & CT), ER, OR, ICU, ACU, pharmacy, lab, etc. the hours shall be between 10:00PM to 6:00AM as coordinated well in advance with the medical center.

F) Contractor shall submit a detailed testing schedule of all areas for VA review and approval.

Extensive coordination and flexibility will be required by all parties. Workers will need to be escorted by VA personnel at all times.

G) Perform complete testing and maintenance on the following distribution switchboards:

1. Bldg 19 Switchboard “A” Serving bldg 1.

2. Bldg 19 Switchboard “B” Serving bldg 1.

3. Bldg 2 Boiler Plant Switchboard and Motor Control Centers.

4. Bldg 2 Chiller Plant Switchboard/MCC.

5. Bldg 12 Nursing Home Care Unit (NHCU Switchboard).

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6. Bldg 1 Specialty Care Addition Switchboard

7. EDSS Switchboards and Automatic Transfer Switches

8. NDSS Switchboards and Automatic Transfer Switches

9. Building 38 Medium Voltage Switchboard

10. Building 39 Medium Voltage Switchboard

11. Building 1 EQ1 switchboard

12. Building 40 Normal Power Switchboard

13. Building 40 Emergency Power Switchboard

14. Bldg 44 Switchboard and Panels

H) Perform complete testing of all breakers 250 amps and larger. Removal & bench testing is not required if it is practical to test the breakers in place. All breakers with electronic trip units may be tested utilizing secondary injection. This also applies to breakers within Motor Control Centers.

There are approximately 100 breakers that are 250 A and larger, approximately 45 of those have electronic trip units. Contractor to review drawings and site conditions as required to accurately determine the number of breakers and conditions affecting their testing. The facility has no “fuse molded case breakers”

I) Distribution Panel and Motor Control Center (MCC) Testing and Maintenance;

1. All panels throughout the facility shall be visually inspected and an infrared scan performed.

2. All breakers less than 250 amps shall be actuated and tested with a continuity meter as required to prove positive disconnect in the off position.

3. Vacuum all panels

4. Verify all panel schedules are current and in place.

5. Contractor shall replace all stripped screws in panel fronts and dead fronts by tapping the hole and installing the next SAE sized screw. Tap all holes in the panel so that all cover screws match in size in each panel modified. (No self-tapping screw shall be used). VA will supply contractor with screws approved for panel covers.

J) Busways: visually and thermally inspect, check security of all connections, perform maintenance on all disconnects and breakers as specified, vacuum all enclosures.

K) Perform testing and maintenance on all breakers in the Essential Distribution Synchronizing Switchboard’s (EDSS), and Normal Distribution Synchronizing Switchboards (NDSS) as specified.

L) Perform Testing and Maintenance on all Transformers as listed in the following table.

TRANSFORMER

NUMBER

LOCATION BUILDING FED

NORMALLY

CONNECTED

FEEDER

VOLT KVA TYPE

T1 Adjacent to Bldg 39 Generator Switchboard Gen 1 480/13.2KV 2000 OIL

T2 Adjacent to Bldg 39 Generator Switchboard Gen 2 480/13.2KV 2000 OIL

T3 Adjacent to Bldg 39 Generator

Switchboard Gen 3

480/13.2KV

2000 OIL

T4 Adjacent to Bldg 39 Load Bank Gen Swbrd 13.2/480 2000 OIL

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T5 Adjacent to Bldg 38 Bldg 38 & 39 E 13.2/208 150 OIL

T7 Adjacent to Bldg 3 Boiler Plant

Emergency Feed E

13.2/208

150 OIL

T8 Adjacent to Bldg 14 Bldg 14 E 13.2/208 150 OIL

T9 Adjacent to Bldg 2 Bldg 2 A 13.2/208 150 OIL

T10 Adjacent to Bldg 2 Chiller Plant A 13.2/480 1500 OIL

T12 South of Bldg 6 Bldgs 4,5,6,6A A 13.2/208 300 OIL

T13 East of Bldg 7 Bldg 7 A 13.2/208 112.5 OIL

T14 North of Bldg 4 Bldg 32 A 13.2/208 112.5 OIL

T15 South side of MRI MRI E 13.2/208 300 OIL

T16 West Side of Bldg 30 Bldg 30,33,41 A 13.2/208 225 OIL

T17 North of Bldg 12 Bldg 12 E 13.2/208 300 OIL

T18 East Side of Bldg 1 Bldg 1 Normal A 13.2/208 1500 OIL

T19 West Side of Bldg 1 Bldg 1 Specialty Care A 13.2/208 750 OIL

T20 West of Bldg 40 Bldg 40 Emergency E 13.2/208 150 OIL

T21 West of Bldg 40 Bldg 40, 27 & 8 A 13.2/208 750 OIL

T22 Basement Bldg 1, E

Section Bldg 1 NDSS A

13.2/208

1500 OIL

T23

Basement Bldg 1, E Section

Bldg 1 EDSS E

13.2/208

1500 OIL

TLV1 B010 CT A 208/480 225 Dry

TLV2 B010 XRAY 1, 2, 4 A 208/480 Dry

TLV3 B010 XRAY 3 E 208/480 Dry

TLV4

Basement Bldg 1, E

Section Loading dock 480 E

208/480 Dry

TLV5 A900 OR E 208/480 Dry

TLV6 Bldg 2-124 Chiller Plant LV A 480/208 Dry

TLV7 Bldg 2-109 Laundry Washer 1 A 208/480 Dry

TLV8 Bldg 2-109 Laundry Washer 2 A 208/480 Dry

TLV9 Bldg 2-109 Laundry Washer 3 A 208/480 Dry

TLV10 East of MRI MRI LV E 480/208 Dry

T-E2 Bldg. 44 Boiler Plant E 13.2/480 1500

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T-A2 Bldg. 44 Boiler Plant A 13.2/480 1500

T-LE2 Bldg. 44 MCC Boiler Plant E 480/208 75

T-LA2 Bldg. 44 MCC Boiler Plant A 480/208 75

M) Conduct visual and infrared inspection of all 15KVA feeders and associated load breaks at all medium voltage above ground electrical switches.

ID # Location Mfr

SW I A Bldg 38 ABB

SW I E Bldg 38 ABB

SW P A Bldg 3 ABB

SW P E Bldg 3 ABB

SW F A Bldg 40 ABB

SW F E Bldg 40 ABB

SW E A Bldg 2 S&S

SW E E Bldg 2 S&S

SW U A Bldg 6 S&S

SW U E Bldg 6 S&S

SW T A Bldg 4 S&S

SW T E Bldg 4 S&S

SW S A Flagpole S&S

SW S E Flagpole S&S

SW R A Bldg 19/31 S&S

SW R E Bldg 19/31 S&S

SW O A Bldg 12 ABB

SW O E Bldg 12 ABB

SW G A Spec Care S&S

SW G E Spec Care S&S

MV SW E Boiler Plant

MV SW A Boiler Plant

N) Perform inspection and testing of all automatic transfer switches:

ID # Location Mfr Volts Amps

ATS‐1 EDSS ASCO 208 1200

ATS‐2 EDSS ASCO 208 1200

ATS‐3 EDSS ASCO 208 1200

ATS‐4 EDSS ASCO 208 1200

ATS‐5 EDSS ASCO 208 1200

ATS‐6 EDSS ASCO 208 1200

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ATS‐7

Boiler Plant, Bldg. 2 Caterpillar 208 800

O) In addition to the ATS’s listed in 1.N, perform thermal testing of the ATS located in Bldg. 44, new Boiler Plant, located in LV Switchboard B.

P) Disconnects: There are eight disconnects upstream of panelboards which must be tested. Visually and thermally inspect the disconnects, check security of all connections, perform maintenance, and vacuum all enclosures. Three disconnects are located outside the southwest corner of Bldg. 33, associated with panelboards A, B and C. Two disconnects are located near transformer T-16, associated with Bldgs. 30 and 33. Three disconnects are located in Bldg. 1 basement, associated with transformers TLV1, TLV2 and TLV3.

2) SUBMITTALS:

A) Qualifications: Submit, with proposal, the following:

1. Contractor qualifications, testing equipment to include calibration certification, name and qualifications of persons performing testing and/or maintenance as required under the terms of the contract.

B) Testing Plan: Submit to the COR, within 30 days after project award, the following:

1. Submit a detailed test plan including proposed method of testing, sample test reports, and proposed project schedule. Note all required shutdowns and coordinate with COR.

2. Update schedule weekly and review with the COR.

3. Test plan report shall be typed and/or computerized reporting system.

C) Certification: At completion of testing, deliver to the COR two copies of the following:

1. Certification that all testing has been completed in accordance with the contract requirements.

D) Reports: Submit to the COR, within 180 days after completion of testing, the following:

1. Notification to the COR shall be submitted in writing immediately, describing any critical conditions, including recommendations for corrective action. Contractor shall note that emphasis and clarity should be placed on identifying location, and observed code deficiencies in order that information gathered may be properly evaluated.

2. Provide two hard copies and an electronic copy to the COR of all devices on which testing/maintenance was performed.

3. Provide two hard copies and one electronic copy of the Arc Flash Analysis Report, Short Circuit Study Report, Coordination Study Report, and certified copies of the Electrical Distribution System Test Final Report.

4. Any discrepancies noted shall be identified as to code violation and NEC Chapter and Paragraph.

E) Applicable References: All inspections and field tests shall be in accordance with the latest edition of the applicable IEEE and ANSI codes, standards, and specifications, including, but not limited to:

1. NFPA 70, National Electrical Code.

2. NFPA 70B, Recommended Practice for Electrical Equipment Maintenance.

3. NFPA 70E, Standard for Electrical Safety for the Workplace.

4. NFPA 99, Healthcare Facilities Code

5. NFPA 110, Standard for Emergency and Standby Power System.

6. OSHA Standard 29 CFR 1910, Subparts I & S.

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7. InterNational Electrical Testing Association, Inc. (NETA) – Maintenance and Testing Specifications.

8. Operating/Maintenance manuals, and specifications of the electrical equipment to be maintained and tested. These documents may be obtained from the VHA Medical Center, or the equipment manufacturers.

9. VHA Directive 1028, Electrical Power Distribution System

10. NFPA 780, Standard for the installation of Lightning Protection Systems

11. Applicable OSHA guidelines

3) QUALIFICATIONS OF ELECTRICAL ENGINEER

A) Electrical engineer shall be regularly engaged in the testing of electrical equipment devices, installations, and systems.

B) Electrical engineer shall regularly perform overcurrent protective device short circuit, coordination and arc flash studies.

C) Electrical engineer shall be a licensed professional engineer.

D) Electrical engineer shall have successfully performed at least 3 projects in the past 10 years at a VA medical facility which required compliance with VHA Directive 1028

4) QUALIFICATIONS OF TESTING FIRM

A) Testing firm shall have successfully performed at least 3 projects in the past 10 years at a VA medical facility which required compliance with VHA Directive 1028, and specifically:

1. Testing firm shall have implemented all the requirements of VHA Directive 1028, paragraph 8.j, Testing and Maintenance.

B) The prime contractor testing firm shall be an independent testing organization which can function as an unbiased testing authority, professionally independent of the manufacturers, suppliers, and installers of equipment or systems evaluated by the testing firm, except as explicitly noted in this document.

C) All Schweitzer equipment must be serviced by factory authorized personnel.

D) Any repairs to medium voltage equipment must be performed by factory authorized personnel.

E) The testing firm shall be regularly engaged in the testing of electrical equipment devices, installations, and systems.

F) The lead, on site, technical person shall hold a current certification in one of the following:

1. NETA (InterNational Electrical Testing Association) Certified Technician/Level III or Certified Senior Technician/Level IV

2. NICET, (National Institute for Certification in Engineering Technologies) Engineering Technician/Level III or Senior Engineering Technician/Level IV specifically in Electrical Testing Technology.

3. Or a recognized national or state certification in electrical testing and maintenance that is acceptable to the VA.

4. The testing firm shall perform the work utilizing technicians who are regular employees of the firm and shall not sub-contract the work to a local electrical contractor.

5. The testing firm shall submit proof of the above qualifications with bid documents when requested.

G) Contractor shall be fully qualified to protect their employees, MGVAMC staff and patients from exposure to infectious agents present in or introduced into the hospital.

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5) DIVISION OF RESPONSIBILITY

A) The government shall notify the contractor when equipment becomes available for maintenance tests. Work shall be coordinated to expedite project scheduling.

B) The government shall supply the previous combined electrical distribution system test report, previous coordination and arc flash study, and current one-line diagram. Complete as-builts are not available.

C) The government will provide a limited number of escorts to unlock doors and coordinate shutdowns.

The escorts will not be electricians and most will not have any 70E training.

D) Contractor shall provide all labor not expressly provided by the government to include R&R of panel covers, etc.

E) Contractor shall verify protective device settings.

F) The contractor shall notify the owner prior to commencement of any testing.

G) Any system, material, or workmanship which is found defective shall be reported.

H) The contractor shall maintain a written record of all tests and shall assemble and certify a final test report.

6) SAFETY AND PRECAUTIONS

A) Safety practices should include, but are not limited to, the following requirements:

1. Current Occupational Safety and Health regulations

2. National Safety Council, Accident Prevention Manual for Industrial Operations

3. Applicable state and local safety operating procedures

4. Owner's local safety practices

5. ANSI/NFPA 70E, Electrical Safety Requirements for Employee Workplaces

6. OSHA 29 CFR 1910.147. Control of Hazardous Energy Sources (Lockout/Tagout)

B) All tests shall be performed with apparatus de-energized except where otherwise specifically required.

C) The testing organization shall have a designated safety representative on the project to supervise operations with respect to safety.

D) Contractor shall provide all required PPE and shall follow NFPA 70E to determine an electrically safe working condition at all times.

E) Contractor shall provide their own lockout/tagout plan and devices.

7) GENERAL

A) Suitability of Test Equipment

1. All test equipment shall be in good mechanical and electrical condition.

2. Split-core current transformers and clamp-on or tong-type ammeters require careful consideration of the following in regard to accuracy:

(a) Position of the conductor within the core

(b) Clean, tight fit of the core pole faces

(c) Presence of external fields

(d) Accuracy of the current transformer ratio in addition to the accuracy of the secondary meter

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3. Selection of metering equipment should be based on a knowledge of the waveform of the variable being measured. Digital multimeters may be average or rms sensing and may include or exclude the dc component. When the variable contains harmonics or dc offset and, in general, any deviation from a pure sine wave, average sensing, rms scaled meters may be misleading.

4. Field test metering used to check power system meter calibration must have an accuracy higher than that of the instrument being checked.

5. Accuracy of metering in test equipment shall be appropriate for the test being performed but not in excess of two percent of the scale used.

6. Wave shape and frequency of test equipment output waveforms shall be appropriate for the test and the tested equipment.

B) Test Instrument Calibration

1. The testing firm shall have a calibration program which assures that all applicable test instruments are maintained within rated accuracy.

2. The accuracy shall be directly traceable to the National Institute of Standards and Technology (NIST)

3. Instruments shall be calibrated in accordance with the following frequency schedule:

(a) Field instruments: Analog, 6 months maximum. Digital, 12 months maximum.

(b) Laboratory instruments: 12 months

(c) Leased specialty equipment: 12 months where accuracy is guaranteed by lessor

4. Dated calibration labels shall be visible on all test equipment.

5. Records, which show date and results of instruments calibrated or tested, must be kept up-to-date.

6. Up-to-date instrument calibration instructions and procedures shall be maintained for each test instrument.

7. Calibrating standard shall be of higher accuracy than that of the instrument tested.

C) Test Report

1. The test report shall include the following:

(a) Summary of project

(b) Description of equipment tested

(c) Description of test

(d) Test results

(e) Analysis and recommendations

2. Furnish two hard copies and electronic copies of the complete report to the owner as required in the maintenance contract.

8) INSPECTION & TEST PROCEDURES

A) Switchgear and Switchboard Assemblies

1. Visual and Mechanical Inspection

(a) Compare equipment nameplate data with latest one-line diagram.

(b) Inspect physical, electrical, and mechanical condition including evidence of moisture or corona.

(c) Verify appropriate anchorage, required area clearances, physical damage, and correct alignment.

(d) Physically check and record the fuse and/or circuit breaker sizes and types for all devices.

(e) Inspect all bus connections for high resistance using one of the following method

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B) Metal-Enclosed Busways

1. Visual and Mechanical Inspection

(a) Inspect busway for physical damage and evidence of corona.

(b) Inspect for appropriate bracing, suspension, alignment, and enclosure ground.

C) Switches, Medium-Voltage, Metal-Enclosed

1. Visual and Mechanical Inspection

(a) Inspect physical and mechanical condition.

(b) Verify appropriate anchorage and required area clearances.

D) Circuit Breakers, Low-Voltage, Insulated Case/Molded Case

1. Visual and Mechanical Inspection

(a) Inspect circuit breaker for correct mounting.

(b) Operate circuit breaker to insure smooth operation.

(c) Inspect case for cracks or other defects.

(d) Inspect all bolted electrical connections for high resistance using one of the following methods:

(e) Use of low-resistance ohmmeter in accordance with Section 7.6.1.1.2.3 (Electrical

Tests).

(f) Verify tightness of accessible bolted electrical connections by calibrated torque-wrench method in accordance with manufacturer's published data or Table 10.12.

(g) Inspect mechanism contacts and arc chutes in unsealed units.

E) Electrical Tests

1. Perform a contact-resistance test.

(a) Perform resistance measurements through all bolted connections with a low-resistance ohmmeter, if applicable, in accordance with Section 7.6.1.1.1.4 (Visual and Mechanical Inspection).

(b) Verify correct operation of any auxiliary features such as trip and pickup indicators, zone interlocking, electrical close and trip operation, trip-free, and antipump function.

(c) Verify the calibration of all functions of the trip unit by means of secondary injection for breakers having electronic trip units, otherwise utilize primary injection.

F) Test Values

1. Compare bolted connection resistances to values of similar connections.

2. Bolt-torque levels shall be in accordance with Table 10.12 unless otherwise specified by manufacturer.

3. Micro ohm or millivolt drop values shall not exceed the high levels of the normal range as indicated in the manufacturer's published data. If manufacturer's data is not available, investigate any values which deviate from adjacent poles or similar breakers by more than 25 percent of the lowest value.

4. Circuit breaker insulation resistance shall be in accordance with Table 10.1.

5. Control wiring insulation resistance shall be a minimum of two megaohms.

6. Trip characteristic of breakers shall fall within manufacturer's published time-current characteristic tolerance band, including adjustment factors.

7. For molded-case circuit breakers all trip times shall fall within Table 10.7. Circuit breakers exceeding specified trip time at 300 percent of pickup shall be tagged defective.

8. For molded-case circuit breakers instantaneous pickup values shall be within values shown in Table 10.8.

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G) Medium Voltage Circuit Breakers

1. Visual and Mechanical Inspection

(a) Inspect physical and mechanical condition.

(b) Inspect anchorage, alignment, and grounding. Inspect arc chutes. Inspect moving and stationary contacts for condition, wear, and alignment.

(c) Verify that all maintenance devices are available for servicing and operating the breaker.

(d) Verify that primary and secondary contact wipe and other dimensions vital to satisfactory operation of the breaker are correct.

2. Perform all mechanical operator and contact alignment tests on both the breaker and its operating mechanism.

3. Inspect all bolted electrical connections for high resistance using one of the following methods:

(a) Use of low-resistance ohmmeter in accordance with Section 7.6.1.2.2.3 (Electrical Tests).

(b) Verify tightness of accessible bolted electrical connections by calibrated torque-wrench method in accordance with manufacturer's published data or Table 10.12.

4. Verify cell fit and element alignment.

5. Verify racking mechanism.

6. Thoroughly clean unit prior to testing unless as-found and as-left tests are required.

7. Lubrication

(a) Verify appropriate contact lubricant on moving current-carrying parts.

(b) Verify appropriate lubrication on moving and sliding surfaces.

H) Electrical Tests

1. Perform a contact-resistance test.

2. Perform an insulation-resistance test at 1000 volts dc from pole-to-pole and from each pole-to-ground with breaker closed and across open contacts of each phase.

3. Inspect all bolted electrical connections for high resistance using one of the following methods:

(a) Use of low-resistance ohmmeter in accordance with Section 7.6.1.2.1.6 (Visual and Mechanical Inspection).

(b) Verify tightness of accessible bolted electrical connections by calibrated torque-wrench method in accordance with manufacturer's published data or Table 10.12.

4. Make adjustments for the final settings in accordance with the coordination study supplied by owner.

5. Determine minimum pickup current by primary current injection.

6. Determine long-time delay by primary current injection.

7. Determine short-time pickup and delay by primary current injection.

8. Determine ground-fault pickup and delay by primary current injection.

9. Determine instantaneous pickup value by primary current injection.

10. Verify the calibration of all functions of the trip unit by means of secondary injection.

11. Activate auxiliary protective devices, such as ground-fault or undervoltage relays, to insure operation of shunt trip devices. Check the operation of electrically-operated breakers in their cubicles.

12. Verify correct operation of any auxiliary features such as trip and pickup indicators, zone interlocking, electrical close and trip operation, trip-free, and antipump function.

13. Verify operation of charging mechanism.

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I) Test Values

1. Compare bolted connection resistances to values of similar connections.

2. Bolt-torque levels shall be in accordance with Table 10.12 unless otherwise specified by manufacturer.

3. Micro ohm or millivolt drop values shall not exceed the high levels of the normal range as indicated in the manufacturer's published data. If manufacturer's data is not available, investigate any values which deviate from adjacent poles or similar breakers by more than 25 percent of the lowest value.

4. Circuit breaker insulation resistance shall be in accordance with Table 10.1.

5. Control wiring insulation resistance shall be a minimum of two megohms.

6. Trip characteristics of breakers shall fall within manufacturer's published time-current tolerance bands.

7. Use of low-resistance ohmmeter in accordance with Section 7.1.2.3 (Electrical Tests).

8. Verify tightness of accessible bolted electrical connections by calibrated torque-wrench method in accordance with manufacturer's published data or Table 10.12.

9. Confirm correct operation and sequencing of electrical and mechanical interlock systems.

10. Attempt closure on locked-open devices. Attempt to open locked-closed devices.

11. Make key exchange with devices operated in off-normal positions.

12. Thoroughly clean unit prior to testing unless as-found and as-left tests are required.

13. Inspect insulators for evidence of physical damage or contaminated surfaces.

14. Verify correct barrier and shutter installation and operation.

15. Lubrication

(a) Verify appropriate contact lubricant on moving current-carrying parts.

(b) Verify appropriate lubrication on moving and sliding surfaces.

(c) Exercise all active components.

16. Inspect all mechanical indicating devices for correct operation.

17. Verify that filters are in place and/or vents are clear.

18. Test operation, alignment, and penetration of instrument transformer withdrawal disconnects, current-carrying and grounding, in accordance with Section 7.10.

J) Transformers, Dry Type, Air-Cooled, 600 Volts and Below - Small

(167 kVA Single-Phase, 500 kVA 3-Phase, and Smaller)

1. Visual and mechanical inspection.

(a) Inspect physical and mechanical condition.

(b) Thoroughly clean unit prior to testing unless as-found and as-left tests are required.

(c) Physically Check and record the fuse and/or circuit breaker sizes and types.

2. Inspect all bolted electrical connections for high resistance using one of the following methods:

(a) Use of low-resistance ohmmeter in accordance with Section 7.2.1.1.2.1 (Electrical Tests).

(b) Verify tightness of accessible bolted electrical connections by calibrated torque-wrench method in accordance with manufacturer's published data or Table 10.12.

K) Transformers, Liquid-Filled

1. Visual and Mechanical Inspection

(a) Inspect physical and mechanical condition.

2. Inspect all bolted electrical connections for high resistance using one of the following methods:

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(a) Use of low-resistance ohmmeter in accordance with Section 7.2.2.2.2 (Electrical Tests).

(b) Verify tightness of accessible bolted electrical connections by calibrated torque-wrench method in accordance with manufacturer's published data or Table 10.12.

3. Verify correct liquid level in all tanks and bushings.

4. Verify that positive pressure is maintained on nitrogen-blanketed transformers. Refill as necessary after testing.

5. Perform specific inspections and mechanical tests as recommended by manufacturer.

6. Verify correct equipment grounding.

7. Verify the presence of transformer surge arresters.

L) Electrical Tests

1. Perform resistance measurements through all bolted connections with a low-resistance ohmmeter, if applicable, in accordance with Section 7.2.2.1.5 (Visual and Mechanical Inspection).

2. If core ground strap is accessible, test with earth ground resistivity meter or clamp on ground tester.

3. Measure the percentage of oxygen in the nitrogen gas blanket, if applicable.

4. Remove a sample of insulating liquid in accordance with ASTM D923. Sample shall be tested in accordance with the referenced standard.

(a) Dielectric breakdown voltage: ASTM D877 and/or ASTM D1816

(b) Acid neutralization number: ANSI/ASTM D974

(c) Specific gravity: ANSI/ASTM D1298

(d) Interfacial tension: ANSI/ASTM D971 or ANSI/ASTM D2285

(e) Color: ANSI/ASTM D1500

(f) Visual Condition: ASTM D1524

(g) Parts per million water: ASTM D1533. Required on 25 kV or higher voltages and on all silicone-filled units.

(h) Measure dissipation factor or power factor in accordance with ASTM D924.

5. Remove a sample of insulating liquid in accordance with ASTM D3613 and perform dissolved gas analysis (DGA) in accordance with ANSI/IEEE C57.104 or ASTM D3612.

M) Test Values

1. Compare bolted connection resistances to values of similar connections.

2. Bolt-torque levels shall be in accordance with Table 10.12 unless otherwise specified by manufacturer.

3. Investigate presence of oxygen in nitrogen gas blanket.

4. Insulating liquid shall be in accordance with Table 10.4.

5. Evaluate results of dissolved-gas analysis in accordance with ANSI/IEEE Standard

C57.104.

N) Protective Relays (Schweitzer SEL)

1. Visual and Mechanical Inspection

(a) Verify that all settings are in accordance with coordination study or setting sheet supplied by owner.

(b) Coordinate with Schweitzer to make any necessary setting changes.

O) Grounding Systems

1. Inspection and testing

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(a) Verify and test the ground system at both the service entrance connection and the connection to the grounding electrode using earth ground resistivity tester or clamp on meter.

2. Test Values

(a) The resistance between the main grounding electrode and ground should be no greater than five ohms for commercial or industrial systems and one ohm or less for generating or transmission station grounds unless otherwise specified by the owner.

(Reference ANSI/IEEE Standard 142)

(b) Investigate point-to-point resistance values which exceed 0.5 ohm.

3. Lightning Protection Systems Bldg 32 and Bldg 44.

P) Motor Control

1. Motor Control Centers

(a) Refer to Section 7.1, Switchgear and Switchboard Assemblies, for appropriate inspections and tests of the motor control center bus.

(b) Refer to Section 7.5.1.1, Low-Voltage Switches, for appropriate inspections and tests of the motor control center switches.

(c) Refer to Section 7.6.1, Low-Voltage Circuit Breakers, for appropriate inspections and tests of the motor control center circuit breakers.

(d) Refer to Section 7.16.1, Low-Voltage Motor Starters, for appropriate inspections and tests of the motor control center starters.

Q) Surge Arresters - Low-Voltage Surge Protection Devices

1. Visual and Mechanical Inspection

(a) Inspect physical and mechanical condition.

(b) Inspect for correct mounting and adequate clearances.

(c) Verify that the ground lead on each device is individually attached to a ground bus or ground electrode.

R) Emergency Systems - Automatic Transfer Switches

1. Visual and Mechanical Inspection

(a) Inspect physical and mechanical condition.

2. Lubrication

(a) Verify appropriate contact lubricant on moving current-carrying parts.

(b) Verify appropriate lubrication on moving and sliding surfaces.

3. Verify that manual transfer warnings are attached and visible.

4. Verify tightness of all control connections.

5. Inspect all bolted electrical connections for high resistance using one of the following methods:

(a) Use of low-resistance ohmmeter in accordance with Section 7.22.3.2.2 (Electrical Tests).

(b) Verify tightness of accessible bolted electrical connections by calibrated torque-wrench method in accordance with manufacturer's published data or Table 10.12.

6. Perform manual transfer operation.

7. Verify positive mechanical interlocking between normal and alternate sources.

S) Electrical Tests

Page-14

1. Perform a contact-resistance test.

2. Perform resistance measurements through all bolted connections with a low-resistance ohmmeter, if applicable, in accordance with Section 7.22.3.1.5 (Visual and Mechanical Inspection).

3. Verify settings and operation of control devices.

4. Calibrate and set all relays and timers in accordance with Section 7.9.

T) Test Values

1. Compare bolted connection resistances to values of similar connections.

2. Bolt-torque levels shall be in accordance with Table 10.12 unless otherwise specified by manufacturer.

3. Microhm or millivolt drop values shall not exceed the high levels of the normal range as indicated in the manufacturer's published data. If manufacturer's data is not available, investigate any values which deviate from adjacent poles or similar switches by more than 25 percent of the lowest value.

Page-15

TABLE 10.4

Suggested Limits for Service-Aged Insulating Fluids

Mineral Oil*

Test

ASTM Method

69 kV and Below

Above 69 kV through 288 kV

345 kV and Above

Dielectric breakdown, kV minimum

D877 26 26 26

Dielectric breakdown, kV minimum @ 0.04 gap

D1816 23 26 26

Dielectric breakdown, kV minimum @ 0.08 gap

D1816 34 45 45

Interfacial tension, mN/m minimum

D971 24 26 30

Neutralization number, mg KOH/g maximum

D974 0.2 0.2 0.1

Water content, ppm maximum D1533 35 25 20

Power factor at 25°C, % D924 1.0**** 1.0**** 1.0****

Power factor at 100 °C, % D924 1.0**** 1.0**** 1.0****

Test

ASTM Method

Silicone**

Less Flammable Hydrocarbon***

Dielectric Breakdown, kV minimum D877 25 24

Visual D2129 Colorless, clear, free of particles

N/A

Water Content, ppm maximum D1533 100 45

Dissipation factor, % max. @ 25°C D924 0.2 1.0

Viscosity, cSt @ 25°C D445 47.5 - 52.5 N/A

Fire Point, °C, minimum D92 340 300

Neutralization number, mg KOH/g max. D974 0.2 N/A

Neutralization number, mg KOH/g max. D664 N/A 0.25

Interfacial Tension, mN/m minimum @ 25°C D971 N/A 22

* IEEE C57.106-1991 Guide for Acceptance and Maintenance of Insulating Oil in Equipment, Table 5.

** IEEE C57.111-1989 Guide for Acceptance of Silicone Insulating Fluid and Its Maintenance in Transformers, Table

3.

*** IEEE C57.121-1988 Guide for Acceptance and Maintenance of Less Flammable Hydrocarbon Fluid in

Transformers, Table 3.

**** IEEE Standard. 637-1985 IEEE Guide for the Reclamation of Insulating Oil and Criteria for Its Use.

Page-16

TABLE 10.7

Molded-Case Circuit Breakers Values for Inverse Time Trip Test

(At 300% of Rated Continuous Current of Circuit Breaker)

Range of Rated Continuous Current Amperes

Maximum Trip Time in Seconds For Each Maximum Frame Rating1

�250V 251 - 600V

0-30 50 70

31-50 80 100

51-100 140 160

101-150 200 250

151-225 230 275

226-400 300 350

401-600 ------------ 450

601-800 ------------ 500

801-1000 ------------ 600

1001-1200 ------------ 700

1201-1600 ------------ 775

1601-2000 ------------ 800

2001-2500 ------------ 850

2501-5000 ------------ 900

Reproduction of Table 5-3 from NEMA Standard AB4-1991.

1 For integrally-fused circuit breakers, trip times may be substantially longer if tested with the fuses replaced by solid links (shorting bars).

TABLE 10.8

Instantaneous Trip Setting Tolerancesfor Field Testing of Marked Adjustable Trip Circuit Breakers

Tolerances of High and Low Settings

Ampere Rating High Low

�250 +40% -25%

+40% -30%

>250 ±25% ±30%

Reproduction of Table 5-4 from NEMA publication AB4-1991.

For circuit breakers with nonadjustable instantaneous trips, tolerances apply to the manufacturer's published trip range, i.e., +40 percent on high side, -30 percent on low side.

Page-17

TABLE 10.12

US Standard

Bolt Torques for Bus Connections Heat-Treated Steel - Cadmium or Zinc Plated

Grade SAE 1 & 2 SAE 5 SAE 7 SAE 8

Minimum Tensile (P.S.I.)

64K 105K 133K 150K

Bolt Diameter In Inches

Torque (Foot Pounds)

¼ 4.0 5.6 8.0 8.4

5/16 7.2 11.2 15.2 17.6

3/8 12.0 20.0 27.2 29.6

7/16 19.2 32.0 44.0 48.0

½ 29.6 48.0 68.0 73.6

9/16 42.4 70.4 96.0 105.6

5/8 59.2 96.0 133.6 144.0

¾ 96.0 160.0 224.0 236.8

7/8 152.0 241.6 352.0 378.4

1.0 225.6 372.8 528.0 571.2

Silicon Bronze Fasteners1

Torque (Foot-Pounds)

Bolt Diameter in Inches Nonlubricated Lubricated

5/16 15 10

3/8 20 14

1/2 40 25

5/8 55 40

3/4 70 60

1 Bronze alloy bolts shall have a minimum tensile strength of 70,000 pounds per square inch.

Page-18

TABLE 10.12 (cont.)

Aluminum Alloy Fasteners2 Torque (Foot Pounds)

Bolt Diameter in Inches Lubricated

5/16 8.0

3/8 11.2

1/2 20.0

5/8 32.0

3/4 48.0

2 Aluminum alloy bolts shall have a minimum tensile strength of 55,000 pounds per square inch.

Stainless Steel Fasteners3

Torque (Foot Pounds)

Bolt Diameter in Inches Uncoated

5/16 14

3/8 25

1/2 45

5/8 60

3/4 90

3 Bolts, cap screws, nuts, flat washers, locknuts: 18-8 alloy. Belleville washers: 302 alloy.

Page-19

TABLE 10.18

Thermographic Survey Suggested Actions Based on Temperature Rise

Temperature difference (DT) based on comparisons between similar components under similar loading.

Temperature difference (DT) based upon comparisons between component and ambient air temperatures.

Recommended Action

1�C - 3�C

0�C - 10�C

Possible deficiency; warrants investigation

4�C - 15�C

11�C - 20�C

Indicates probable deficiency;

repair as time permits

22�C - 40�C

Monitor continuously until corrective measures can be accomplished

> 16�C

> 40�C

Major discrepancy; repair immediately

Temperature specifications vary depending on the exact type of equipment. Even in the same class of equipment (i.e., cables) there are various temperature ratings. Heating is generally related to the square of the current;

therefore, the load current will have a major impact on �T. In the absence of consensus standards for �T, the values in this table will provide reasonable guidelines.

9) PERIOD OF PERFORMANCE

A) All work to be completed in 360 days.