SOW NETA Testing Requirements.pdf

NETA Acceptance Testing Specifications i

CONTENTS

1. GENERAL SCOPE

2. APPLICABLE REFERENCES

2.1 Codes, Standards and Specifications

2.2 Other Publications

2.3 Contact Information

3. QUALIFICATIONS OF TESTING ORGANIZATION AND PERSONNEL

3.1 Testing Organization

3.2 Testing Personnel

4. DIVISION OF RESPONSIBILITY

4.1 The Owner’s Representative

4.2 The Testing Organization

5. GENERAL

5.1 Safety and Precautions

5.2 Suitability of Test Equipment

5.3 Test Instrument Calibration

5.4 Test Report

6. POWER SYSTEM STUDIES

7. INSPECTION AND TEST PROCEDURES

7.1 Switchgear and Switchboard Assemblies

7.2.1.1 Transformers, Dry-Type, Air-Cooled, Low-Voltage, Small

7.2.1.2 Transformers, Dry-Type, Air-Cooled, Large

7.2.2 Transformers, Liquid-Filled

7.3.1 Cables, Low-Voltage, Low-Energy - Reserved ------------------------------------------------ 38

7.3.2 Cables, Low-Voltage, 600-Volt Maximum ----------------------------------------------------- 39

7.3.3 Cables, Medium- and High-Voltage -------------------------------------------------------------- 41

7.4 Metal-Enclosed Busways

7.5.1.1 Switches, Air, Low-Voltage

7.5.1.2 Switches, Air, Medium-Voltage, Metal-Enclosed

7.5.1.3 Switches, Air, Medium- and High-Voltage, Open

7.5.2 Switches, Oil, Medium-Voltage

7.5.3 Switches, Vacuum, Medium-Voltage

7.5.4 Switches, SF6, Medium-Voltage

7.5.5 Switches, Cutouts

7.6.1.1 Circuit Breakers, Air, Insulated-Case/Molded-Case

7.6.1.2 Circuit Breakers, Air, Low-Voltage Power

7.6.1.3 Circuit Breakers, Air, Medium-Voltage

7.6.2 Circuit Breakers, Oil, Medium- and High-Voltage

7.6.3 Circuit Breakers, Vacuum, Medium-Voltage

7.6.4 Circuit Breakers, SF6

7.7 Circuit Switchers

7.8 Network Protectors, 600-Volt Class

7.9.1 Protective Relays, Electromechanical and Solid-State

7.9.2 Protective Relays, Microprocessor-Based

7.10 Instrument Transformers

7.11 Metering Devices

7.12.1.1 Regulating Apparatus, Voltage, Step Voltage Regulators

7.12.1.2 Regulating Apparatus, Voltage, Induction Regulators

7.12.2 Regulating Apparatus, Current - Reserved

NETA Acceptance Testing Specifications ii

7.12.3 Regulating Apparatus, Load Tap-Changers

7.13 Grounding Systems

7.14 Ground-Fault Protection Systems, Low-Voltage

7.15.1 Rotating Machinery, AC Induction Motors and Generators

7.15.2 Rotating Machinery, Synchronous Motors and Generators

7.15.3 Rotating Machinery, DC Motors and Generators

7.16.1.1 Motor Control, Motor Starters, Low-Voltage

7.16.1.2 Motor Control, Motor Starters, Medium-Voltage

7.16.2.1 Motor Control, Motor Control Centers, Low-Voltage

7.16.2.2 Motor Control, Motor Control Centers, Medium-Voltage

7.17 Adjustable Speed Drive Systems

7.18.1.1 Direct-Current Systems, Batteries, Flooded Lead-Acid

7.18.1.2 Direct-Current Systems, Batteries, Nickel-Cadmium - Reserved

7.18.1.3 Direct-Current Systems, Batteries, Valve-Regulated Lead-Acid

7.18.2 Direct-Current Systems, Chargers

7.18.3 Direct-Current Systems, Rectifiers - Reserved

7.19.1 Surge Arresters, Low-Voltage

7.19.2 Surge Arresters, Medium- and High-Voltage

7.20.1 Capacitors and Reactors, Capacitors

7.20.2 Capacitors and Reactors, Capacitor Control Devices - Reserved

7.20.3.1 Capacitors and Reactors, Reactors, Shunt and Current-Limiting, Dry-Type

7.20.3.2 Capacitors and Reactors, Reactors, Shunt and Current-Limiting, Liquid-Filled

7.21 Outdoor Bus Structures

7.22.1 Emergency Systems, Engine Generator

7.22.2 Emergency Systems, Uninterruptible Power Systems

7.22.3 Emergency Systems, Automatic Transfer Switches

7.23 Communications - Reserved

7.24.1 Automatic Circuit Reclosers and Line Sectionalizers, Automatic Circuit Reclosers, Oil/Vacuum

7.24.2 Automatic Circuit Reclosers and Line Sectionalizers, Automatic Line Sectionalizers, Oil

7.25 Fiber-Optic Cables

8. SYSTEM FUNCTION TESTS

9. THERMOGRAPHIC SURVEY

10. ELECTROMAGNETIC FIELD TESTING

11. CORONA STUDIES - Reserved

TABLES

100.1 Insulation Resistance Test Values, Electrical Apparatus and Systems

100.2 Switchgear Withstand Test Voltages

100.3 Recommended Dissipation Factor/Power Factor at 20° C; Liquid-Filled Transformers, Regulators, and Reactors, Acceptance Test Values

100.4 Insulating Fluid Limits

100.4.1 Test Limits for New Insulating Oil Received in New Equipment

100.4.2 Test Limits for Silicone Insulating Liquid in New Transformers

100.4.3 Typical Values for Less-Flammable Hydrocarbon Insulating Liquid

100.5 Transformer Insulation Resistance, Acceptance Testing

100.6 Medium-Voltage Cables, Acceptance Test Values

100.6.1 DC Test Voltages

100.6.2 AC Test Voltages

100.6.3 Partial Discharge Requirements

NETA Acceptance Testing Specifications iii

100.6.4 Very Low Frequency Testing Levels

100.7 Inverse Time Trip Test at 300% of Rated Continuous Current, Molded-Case Circuit Breakers

100.8 Instantaneous Trip Tolerances for Field Testing of Circuit Breakers

100.9 Instrument Transformer Dielectric Tests, Field Acceptance

100.10 Maximum Allowable Vibration Amplitude

100.11 Reserved

100.12 US Standard Fasteners, Bolt Torque Values for Electrical Connections

100.12.1 Heat-Treated Steel - Cadmium or Zinc Plated

100.12.2 Silicon Bronze Fasteners

100.12.3 Aluminum Alloy Fasteners

100.12.4 Stainless Steel Fasteners

100.13 SF6 Gas Tests

100.14 Insulation Resistance Conversion Factors

100.14.1 Test Temperatures to 20° C

100.14.2 Test Temperatures to 40° C

100.15 High-Potential Test Voltage, Automatic Circuit Reclosers

100.16 High-Potential Test Voltage for Acceptance Test of Line Sectionalizers

100.17 Dielectric Withstand Test Voltages, Metal-Enclosed Bus

100.18 Thermographic Survey, Suggested Actions Based on Temperature Rise

100.19 Dielectric Withstand Test Voltages, Electrical Apparatus Other than Inductive Equipment...222

100.20 Rated Control Voltages and their Ranges for Circuit Breakers

100.20.1 Circuit Breakers

100.20.2 Solenoid-Operated Devices

100.21 Accuracy of IEC Class TP Current Transformers Error Limit

100.22 Minimum Radii for Power Cable, Single & Multiple Conductor Cables with Interlocked

Armor, Smooth or Corrugated Aluminum Sheath or Lead Sheath

APPENDICES

Appendix A - Definitions Appendix B - Reserved Appendix C - About the InterNational Electrical Testing Association Appendix D - Form for Comments Appendix E - Form for Proposals Appendix F - NETA Affiliate and Publications Information Appendix G - Affiliate Application and Publications Order Form

NETA Acceptance Testing Specifications 1

1. GENERAL SCOPE

1. These specifications cover the suggested field tests and inspections that are available to assess the suitability for initial energization of electrical power distribution equipment and systems.

2. The purpose of these specifications is to assure that tested electrical equipment and systems are operational and within applicable standards and manufacturer’s tolerances and that the equipment and systems are installed in accordance with design specifications.

3. The work specified in these specifications may involve hazardous voltages, materials, operations, and equipment. These specifications do not purport to address all of the safety issues associated with their use. It is the responsibility of the user to review all applicable regulatory limitations prior to the use of these specifications

NETA Acceptance Testing Specifications 2

2. APPLICABLE REFERENCES

2.1 Codes, Standards, and Specifications

All inspections and field tests shall be in accordance with the latest edition of the following codes, standards, and specifications except as provided otherwise herein.

1. American National Standards Institute – ANSI

2. ASTM International - ASTM

ASTM D92 Standard Test Method for Flash and Fire Points by Cleveland Open Cup Tester

ASTM D445 Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (the Calculation of Dynamic Viscosity)

ASTM D664 Standard Test Method for Acid Number of Petroleum Products by Potentiometric Titration

ASTM D877 Standard Test Method for Dielectric Breakdown Voltage of Insulating Liquids using Disk Electrodes

ASTM D923 Standard Practices for Sampling Electrical Insulating Liquids

ASTM D924 Standard Test Method for Dissipation Factor (or Power Factor) and Relative Permittivity (Dielectric Constant) of Electrical Insulating Liquids

ASTM D971 Standard Test Method for Interfacial Tension of Oil against Water by the Ring Method

ASTM D974 Standard Test Method for Acid and Base Number by Color- Indicator Titration

ASTM D1298 Standard Test Method for Density, Relative Density (Specific Gravity), or API Gravity of Crude Petroleum and Liquid Petroleum Products by Hydrometer Method

ASTM D1500 Standard Test Method for ASTM Color of Petroleum Products (ASTM Color Scale)

ASTM D1524 Standard Test Method for Visual Examination of Used Electrical Insulating Oils of Petroleum Origin in the Field

ASTM D1533 Standard Test Methods for Water in Insulating Liquids by Coulometric Karl Fischer Titration

ASTM D1816 Standard Test Method for Dielectric Breakdown Voltage of Insulating Oils of Petroleum Origin Using VDE Electrodes

NETA Acceptance Testing Specifications 3

ASTM D2029 Standard Test Methods for Water Vapor Content of Electrical Insulating Gases by Measurement of Dew Point

ASTM D2129 Standard Test Method for Color of Clear Electrical Insulating Liquids (Platinum-Cobalt Scale)

ASTM D2284 Standard Test Method of Acidity of Sulfur Hexafluoride

ASTM D2285 Standard Test Method for Interfacial Tension of Electrical Insulating Oils of Petroleum Origin against Water by the Drop- Weight Method

ASTM D2477 Standard Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Insulating Gases at Commercial Power Frequencies

ASTM D2685 Standard Test Method for Air and Carbon Tetrafluoride in Sulfur Hexafluoride by Gas Chromatography

ASTM D2759 Standard Practice for Sampling Gas from a Transformer under Positive Pressure

ASTM D3284 Standard Test Method for Combustible Gases in the Gas Space of Electrical Apparatus Using Portable Meters

ASTM D3612 Standard Test Method for Analysis of Gases Dissolved in Electrical Insulating Oil by Gas Chromatography

ASTM D3613 Standard Practice for Sampling Electrical Insulating Oils for Gas Analysis and Determination of Water Content

3. Association of Edison Illuminating Companies - AEIC

4. Canadian Standards Association - CSA

5. Electrical Apparatus Service Association - EASA

ANSI/EASA AR100 Recommended Practice for the Repair of Rotating Electrical Apparatus

6. Institute of Electrical and Electronic Engineers - IEEE

ANSI/IEEE C2 National Electrical Safety Code

ANSI/IEEE C37 Guides and Standards for Circuit Breakers, Switchgear, Relays, Compilation Substations, and Fuses

ANSI/IEEE C57 Distribution, Power, and Regulating Transformers Compilation

ANSI/IEEE C62 Surge Protection Compilation

NETA Acceptance Testing Specifications 4

ANSI/IEEE C93.1 Requirements for Power-Line Carrier Coupling Capacitors and Coupling Capacitor Voltage Transformers (CCVT)

ANSI/IEEE 43 IEEE Recommended Practice for Testing Insulation Resistance of Rotating Machinery

ANSI/IEEE 48 IEEE Standard Test Procedures and Requirements for Alternating- Current Cable Terminations 2.5 kV through 765 kV

IEEE 81 IEEE Guide for Measuring Earth Resistivity, Ground Impedance, and Earth Surface Potentials of a Ground System Part I: Normal Measurements

ANSI/IEEE 81.2 IEEE Guide for Measurement of Impedance and Safety Characteristics of Large, Extended or Interconnected Grounding Systems

ANSI/IEEE 95 IEEE Recommended Practice for Insulation Testing of Large AC Rotating Machinery with High Direct Voltage

IEEE 100 The Authoritative Dictionary of IEEE Standards Terms

IEEE 141 IEEE Recommended Practice for Electrical Power Distribution for Industrial Plants (IEEE Red Book)

ANSI/IEEE 142 IEEE Recommended Practice for Grounding of Industrial and Commercial Power Systems (IEEE Green Book)

ANSI/IEEE 241 IEEE Recommended Practice for Electric Power Systems in Commercial Buildings (Gray Book)

ANSI/IEEE 242 IEEE Recommended Practice for Protection and Coordination of Industrial and Commercial Power Systems (Buff Book)

IEEE 386 IEEE Standard for Separable Insulated Connectors System for Power Distribution Systems above 600 V

ANSI/IEEE 399 IEEE Recommended Practice for Power Systems Analysis (Brown Book)

ANSI/IEEE 400 IEEE Guide for Field Testing and Evaluation of the Insulation of Shielded Power Cable Systems

ANSI/IEEE 400.2 IEEE Guide for Field Testing of Shielded Power Cable Systems Using Very Low Frequency (VLF)

ANSI/IEEE 421.3 IEEE Standard for High-Potential-Test Requirements for Excitation Systems for Synchronous Machines

ANSI/IEEE 446 IEEE Recommended Practice for Emergency and Standby Power Systems for Industrial and Commercial Applications (Orange Book)

NETA Acceptance Testing Specifications 5

ANSI/IEEE 450 IEEE Recommended Practice for Maintenance, Testing, and Replacement of Vented Lead-Acid Batteries for Stationary Applications

ANSI/IEEE 493 IEEE Recommended Practice for the Design of Reliable Industrial and Commercial Power Systems (Gold Book)

ANSI/IEEE 519 IEEE Recommended Practices and Requirements for Harmonic Control in Electrical Power Systems

ANSI/IEEE 602 IEEE Recommended Practice for Electric Systems in Health Care Facilities (White Book)

ANSI/IEEE 637 IEEE Guide for the Reclamation of Insulating Oil and Criteria for Its Use

IEEE 644 Procedures for Measurement of Power Frequency Electric and Magnetic Fields from AC Power Lines

ANSI/IEEE 739 IEEE Recommended Practice for Energy Management in Commercial and Industrial Facilities (Bronze Book)

ANSI/IEEE 902 IEEE Guide for Maintenance, Operation and Safety of Industrial and Commercial Power Systems (Yellow Book)

IEEE 1015 IEEE Recommended Practice for Applying Low-Voltage Circuit Breakers Used in Industrial and Commercial Power Systems (Blue Book)

IEEE 1100 IEEE Recommended Practice for Powering and Grounding Sensitive Electronic Equipment (Emerald Book)

ANSI/IEEE 1106 IEEE Recommended Practice for Maintenance, Testing, and Replacement of Nickel-Cadmium Batteries for Stationary Applications

ANSI/IEEE 1159 IEEE Recommended Practice on Monitoring Electrical Power Quality

ANSI/IEEE 1188 IEEE Recommended Practice for Maintenance, Testing, and Replacement of Valve-Regulated Lead-Acid (VRLA) Batteries for Stationary Applications

IEEE 1584 IEEE Guide for Arc-Flash Hazard Calculations

7. Insulated Cable Engineers Association – ICEA

ANSI/ICEA 5-46 kV Shielded Power Cable for Use in the Transmission and S-93-639/NEMA Distribution of Electric Energy

WC 74

NETA Acceptance Testing Specifications 6

ANSI/ICEA Standard for Concentric Neutral Cables Rated 5,000 - 46,000 S-94-649 Volts

ANSI/ICEA Standard for Utility Shielded Power Cables Rated 5,000 - 46,000 S-97-682 Volts

8. InterNational Electrical Testing Association - NETA

ANSI/NETA ETT Standard for Certification of Electrical Testing Technicians

ANSI/NETAMTS Standard for Electrical Maintenance Testing of Dry-Type

7.2.1. Transformers

ANSI/NETA MTS Standard for Electrical Maintenance Testing of Liquid-Filled

7.2.1.2 Transformers

NETA MTS Maintenance Testing Specifications for Electrical Power Distribution Equipment and Systems

9. National Electrical Manufacturers Association - NEMA

NEMA AB4 Guidelines for Inspection and Preventive Maintenance of Molded-Case Circuit Breakers Used in Commercial and Industrial Applications

ANSI/NEMA 84.1 Electrical Power Systems and Equipment Voltage Ratings (60 Hz)

NEMA MG1 Motors and Generators

10. National Fire Protection Association - NFPA

ANSI/NFPA 70 National Electrical Code

ANSI/NFPA 70B Recommended Practice for Electric Equipment Maintenance

ANSI/NFPA 70E Electrical Safety Requirements for Employee Workplaces

ANSI/NFPA 99 Standard for Healthcare Facilities

ANSI/NFPA 101 Life Safety Code

ANSI/NFPA 110 Emergency and Standby Power Systems

ANSI/NFPA 780 Installation of Lightning Protection Systems

11. Occupational Safety and Health Administration - OSHA

12. State and local codes and ordinances

13. Underwriters Laboratories, Inc. – UL

NETA Acceptance Testing Specifications 7

2.2 Other Publications

Not Used

2.3 Contact Information

Not Used

NETA Acceptance Testing Specifications 8

3. QUALIFICATIONS OF TESTING ORGANIZATION AND

PERSONNEL

3.1 Testing Organization

1. The testing organization shall be an independent, third party entity which can function as an unbiased testing authority, professionally independent of the manufacturers, suppliers, and installers of equipment or systems being evaluated.

2. The testing organization shall be regularly engaged in the testing of electrical equipment devices, installations, and systems.

3. The testing organization shall use technicians who are regularly employed for testing services.

4. An organization having a designation of “NETA Accredited Company” issued by the InterNational Electrical Testing Association meets the above criteria.

5. The testing organization shall submit appropriate documentation to demonstrate that it satisfactorily complies with these requirements.

3.2 Testing Personnel

1. Technicians performing these electrical tests and inspections shall be trained and experienced concerning the apparatus and systems being evaluated. These individuals shall be capable of conducting the tests in a safe manner and with complete knowledge of the hazards involved. They must evaluate the test data and make a judgment on the serviceability of the specific equipment.

2. Technicians shall be certified in accordance with ANSI/NETA ETT-2000, Standard for Certification of Electrical Testing Personnel. Each on-site crew leader shall hold a current certification, Level III or higher, in electrical testing.

NETA Acceptance Testing Specifications 9

4. DIVISION OF RESPONSIBILITY

4.1 The Owner’s Representative

The owner’s representative shall provide the testing organization with the following:

1. A short-circuit analysis, a coordination study, and a protective device setting sheet.

2. A complete set of electrical plans and specifications, including all change orders.

3. An itemized description of equipment to be inspected and tested.

4. A determination of who shall provide a suitable and stable source of electrical power to each test site.

5. A determination of who shall perform certain preliminary low-voltage insulation-resistance, continuity, and low-voltage motor rotation tests prior to and in addition to tests specified herein.

6. Notification of when equipment becomes available for acceptance tests. Work shall be coordinated to expedite project scheduling.

7. Site-specific hazard notification and safety training.

4.2 The Testing Organization

The testing organization shall provide the following:

1. All field technical services, tooling, equipment, instrumentation, and technical supervision to perform such tests and inspections.

2. Specific power requirements for test equipment.

3. Notification to the owner’s representative prior to commencement of any testing.

4. A timely notification of any system, material, or workmanship that is found deficient based on the results of the acceptance tests.

5. A written record of all tests and a final report.

NETA Acceptance Testing Specifications 10

5. GENERAL

5.1 Safety and Precautions

All parties involved must be cognizant of industry-standard safety procedures. This document does not contain any procedures including specific safety procedures. It is recognized that an overwhelming majority of the tests and inspections recommended in these specifications are potentially hazardous. Individuals performing these tests shall be qualified and capable of conducting the tests in a safe manner and with complete knowledge of the hazards involved.

1. Safety practices shall include, but are not limited to, the following requirements:

1. All applicable provisions of the Occupational Safety and Health Act, particularly OSHA 29 CFR Part 1910 and 29 CFR Part 1926.

2. ANSI/NFPA 70E, Standard for Electrical Safety in the Workplace.

3. The Electrical Safety Program Book, Kenneth G. Mastrullo, Ray A. Jones, Jane G. Jones, NFPA.

4. Applicable state and local safety operating procedures.

5. Owner’s safety practices.

2. A safety lead person shall be identified prior to commencement of work.

3. A safety briefing shall be conducted prior to the commencement of work.

4. All tests shall be performed with the apparatus de-energized and grounded except where otherwise specifically required to be ungrounded or energized for certain tests.

5. The testing organization shall have a designated safety representative on the project to supervise operations with respect to safety. This individual may be the same person described in 5.1.2.

5.2 Suitability of Test Equipment

1. All test equipment shall meet the requirements in Section 5.3 and be in good mechanical and electrical condition.

2. Field test metering used to check power system meter calibration must be more accurate than the instrument being tested.

3. Accuracy of metering in test equipment shall be appropriate for the test being performed.

4. Waveshape and frequency of test equipment output waveforms shall be appropriate for the test to be performed and the equipment to be tested.

5.3 Test Instrument Calibration

NETA Acceptance Testing Specifications 11

1. The testing organization shall have a calibration program which assures that all applicable test instruments are maintained within rated accuracy for each test instrument calibrated.

2. The firm providing calibration service shall maintain up-to-date instrument calibration instructions and procedures for each test instrument calibrated.

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

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

1. Field instruments: Analog and Digital, 12 months maximum.

2. Laboratory instruments: 12 months maximum.

3. Leased specialty equipment: 12 months maximum.

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

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

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

5.4 Test Report

1. The test report shall include the following:

1. Summary of project.

2. Description of equipment tested.

3. Description of tests.

4. Test data.

5. Analysis and recommendations.

2. Test data records shall include the following minimum requirements:

1. Identification of the testing organization.

2. Equipment identification.

3. Humidity, temperature, and other conditions that may affect the results of the tests and/or calibrations.

4. Date of inspections, tests, maintenance, and/or calibrations.

5. Identification of the testing technician.

NETA Acceptance Testing Specifications 12

6. Indication of inspections, tests, maintenance, and/or calibrations to be performed and recorded.

7. Indication of expected results when calibrations are to be performed.

8. Indication of as-found and as-left results, as applicable.

9. Sufficient spaces to allow all results and comments to be indicated.

3. The testing organization shall furnish a copy or copies of the complete report to the owner as specified in the acceptance testing contract.

NETA Acceptance Testing Specifications 13

6. POWER STUDIES

New Coordination and Short Study Reports will NOT be conducted as part of this work. The owner will provide settings for existing systems to confirm proper settings as devices are tested.

NETA Acceptance Testing Specifications 14

7. INSPECTION AND TEST PROCEDURES

7.1 Switchgear and Switchboard Assemblies

1. Visual and Mechanical Inspection

1. Compare equipment nameplate data with drawings and specifications.

2. Inspect physical and mechanical condition.

3. Inspect anchorage, alignment, grounding, and required area clearances.

4. Verify the unit is clean.

5. Verify that fuse and circuit breaker sizes and types correspond to drawings and coordination study as well as to the circuit breaker’s address for microprocessor-communication packages.

6. Verify that current and voltage transformer ratios correspond to drawings.

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

1. Use of a low-resistance ohmmeter in accordance with Section 7.1.2.

2. Verify tightness of accessible bolted electrical connections by calibrated torque-wrench method in accordance with manufacturer’s published data or Table 100.12.

3. Perform thermographic survey in accordance with Section 9.

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

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

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

9. Verify appropriate lubrication on moving current-carrying parts and on moving and sliding surfaces.

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

11. Verify correct barrier and shutter installation and operation.

12. Exercise all active components.

13. Inspect mechanical indicating devices for correct operation.

14. Verify that filters are in place and vents are clear.

NETA Acceptance Testing Specifications 15

15. Perform visual and mechanical inspection of instrument transformers in accordance with Section 7.10.

16. Inspect control power transformers.

1. Inspect for physical damage, cracked insulation, broken leads, tightness of connections, defective wiring, and overall general condition.

2. Verify that primary and secondary fuse or circuit breaker ratings match drawings.

3. Verify correct functioning of drawout disconnecting and grounding contacts and interlocks.

2. Electrical Tests

1. Perform resistance measurements through bolted electrical connections with a low-resistance ohmmeter, if applicable, in accordance with Section 7.1.1.

2. Perform insulation-resistance tests on each bus section, phase-to-phase and phase-to-ground, for one minute in accordance with Table 100.1.

3. Perform a dielectric withstand voltage test on each bus section, each phase-to-ground with phases not under test grounded, in accordance with manufacturer’s published data. If manufacturer has no recommendation for this test, it shall be in accordance with Table

100.2. The test voltage shall be applied for one minute.

4. Perform insulation-resistance tests on control wiring with respect to ground. Applied potential shall be 500 volts dc for 300-volt rated cable and 1000 volts dc for 600-volt rated cable. Test duration shall be one minute. For units with solid-state components or control devices that can not tolerate the applied voltage, follow the manufacturer’s recommendation.

5. Perform electrical tests on instrument transformers in accordance with Section 7.10.

6. Perform ground-resistance tests in accordance with Section 7.13.

7. Determine accuracy of all meters and calibrate watthour meters in accordance with Section 7.11. Verify multipliers.

8. Control Power Transformers

1. Perform insulation-resistance tests. Perform measurements from winding-to-winding and each winding-to-ground. Test voltages shall be in accordance with Table 100.1 unless otherwise specified by the manufacturer.

2. Perform secondary wiring integrity test. Disconnect transformer at secondary terminals and connect secondary wiring to a rated secondary voltage source.

Verify correct potential at all devices.

3. Verify correct secondary voltage by energizing the primary winding with system voltage. Measure secondary voltage with the secondary wiring disconnected.

NETA Acceptance Testing Specifications 16

4. Verify correct function of control transfer relays located in the switchgear with multiple control power sources.

9. Voltage Transformers

1. Perform secondary wiring integrity test. Verify correct potential at all devices.

2. Verify secondary voltages by energizing the primary winding with system voltage.

10. Perform current-injection tests on the entire current circuit in each section of switchgear.

1. Perform current tests by secondary injection with magnitudes such that a minimum current of 1.0 ampere flows in the secondary circuit. Verify correct magnitude of current at each device in the circuit.

*2. Perform current tests by primary injection with magnitudes such that a minimum of 1.0 ampere flows in the secondary circuit. Verify correct magnitude of current at each device in the circuit.

11. Perform system function tests in accordance with Section 8.

12. Verify operation of cubicle switchgear/switchboard space heaters.

13. Perform phasing checks on double-ended or dual-source switchgear to insure correct bus phasing from each source.

3. Test Values

3.1 Test Values – Visual and Mechanical

1. Compare bolted connection resistance values to values of similar connections. Investigate values which deviate from those of similar bolted connections by more than 50 percent of the lowest value. (7.1.1.7.1)

2. Bolt-torque levels shall be in accordance with manufacturer’s published data. In the absence of manufacturer’s published data, use Table 100.12. (7.1.1.7.2)

3. Results of the thermographic survey shall be in accordance with Section 9. (7.1.1.7.3)

3.2 Test Values – Electrical

1. Compare bolted connection resistance values to values of similar connections. Investigate values which deviate from those of similar bolted connections by more than 50 percent of the lowest value.

2. Insulation-resistance values of bus insulation shall be in accordance with manufacturer’s published data. In the absence of manufacturer’s published data, use Table 100.1. Values of insulation resistance less than this table or manufacturer’s recommendations should be investigated. Dielectric withstand voltage tests shall not proceed until insulation-resistance levels are raised above minimum values.

NETA Acceptance Testing Specifications 17

3. If no evidence of distress or insulation failure is observed by the end of the total time of voltage application during the dielectric withstand test, the test specimen is considered to have passed the test.

4. Minimum insulation-resistance values of control wiring shall not be less than two megohms.

5. Results of electrical tests on instrument transformers shall be in accordance with Section 7.10.

6. Results of ground-resistance tests shall be in accordance with Section 7.13.

7. Accuracy of meters shall be in accordance with Section 7.11.

8. Control Power Transformers

1. Insulation-resistance values of control power transformers shall be in accordance with manufacturer’s published data. In the absence of manufacturer’s published data, use Table 100.5. Values of insulation resistance less than this table or manufacturer’s recommendations should be investigated. Dielectric withstand voltage tests shall not proceed until insulation-resistance levels are raised above minimum values.

2. Secondary wiring shall be in accordance with design drawings and specifications.

3. Secondary voltage shall be in accordance with design specifications

4. Control transfer relays shall perform as designed.

9. Voltage transformers

1. Secondary wiring shall be in accordance with design drawings and specifications.

2. Secondary voltage shall be in accordance with design specifications

10. Current-injection tests shall prove current wiring is in accordance with design specifications.

11. Results of system function tests shall be in accordance with Section 8.

12. Heaters shall be operational.

13. Phasing checks shall prove the switchgear or switchboard phasing is correct and in accordance with the system design.

7.2.1.1 Transformers, Dry Type, Air-Cooled, Low-Voltage, Small

NOTE: This category consists of power transformers with windings rated 600 volts or less and sizes equal to or less than 167 kVA single-phase or 500 kVA three-phase.

NETA Acceptance Testing Specifications 18

1. Visual and Mechanical Inspection

1. Compare equipment nameplate data with drawings and specifications.

2. Inspect physical and mechanical condition.

3. Inspect anchorage, alignment, and grounding.

4. Verify that resilient mounts are free and that any shipping brackets have been removed.

5. Verify the unit is clean.

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

1. Use of a low-resistance ohmmeter in accordance with Section 7.2.1.1.2.

2. Verify tightness of accessible bolted electrical connections by calibrated torque-wrench method in accordance with manufacturer’s published data or Table 100.12.

3. Perform thermographic survey in accordance with Section 9.

7. Verify that as-left tap connections are as specified.

2. Electrical Tests

1. Perform resistance measurements through bolted connections with a low-resistance ohmmeter, if applicable, in accordance with Section 7.2.1.1.1.

2. Perform insulation-resistance tests winding-to-winding and each winding-to-ground.

Apply voltage in accordance with manufacturer’s published data or in the absence of manufacturer’s published data, use Table 100.5.

3. Calculate the dielectric absorption ratio and polarization index in accordance with manufacturer’s published data.

*4. Perform turns-ratio tests at all tap positions.

5. Verify correct secondary voltage phase-to-phase and phase-to-neutral after energization and prior to loading.

3. Test Values

3.1 Test Values – Visual and Mechanical

1. Compare bolted connection resistance values to values of similar connections. Investigate values which deviate from those of similar bolted connections by more than 50 percent of the lowest value. (7.2.1.1.1.6.1)

NETA Acceptance Testing Specifications 19

2. Bolt-torque levels shall be in accordance with manufacturer’s published data. In the absence of manufacturer’s published data, use Table 100.12. (7.2.1.1.1.6.2)

3. Results of the thermographic survey shall be in accordance with Section 9. (7.2.1.1.1.6.3)

4. Tap connections are left as found unless otherwise specified. (7.2.1.1.7)

3.2 Test Values – Electrical

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

Investigate values which deviate from those of similar bolted connections by more than 50 percent of the lowest value.

2. Minimum insulation-resistance values of transformer insulation shall be in accordance with manufacturer’s published data. In the absence of manufacturer’s published data, use Table 100.5. Values of insulation resistance less than this table or manufacturer’s recommendations should be investigated.

3. The dielectric absorption ratio or polarization index shall not be less than 1.0.

4. Turns-ratio test results shall not deviate by more than one-half percent from either the adjacent coils or the calculated ratio.

5. Phase-to-phase and phase-to-neutral secondary voltages shall be in agreement with nameplate data.

7.2.1.2 Transformers, Dry Type, Air-Cooled, Large

NOTE: This category consists of power transformers with windings rated higher than 600 volts and low-voltage transformers larger than 167 kVA single-phase or 500 kVA three-phase.

1. Visual and Mechanical Inspection

1. Compare equipment nameplate data with drawings and specifications.

2. Inspect physical and mechanical condition.

3. Inspect anchorage, alignment, and grounding.

4. Verify that resilient mounts are free and that any shipping brackets have been removed.

5. Verify the unit is clean.

*6. Verify that control and alarm settings on temperature indicators are as specified.

7. Verify that cooling fans operate and that fan motors have correct overcurrent protection.

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

1. Use of a low-resistance ohmmeter in accordance with Section 7.2.1.2.2.

NETA Acceptance Testing Specifications 20

2. Verify tightness of accessible bolted electrical connections by calibrated torque-wrench method in accordance with manufacturer’s published data or Table 100.12.

3. Perform thermographic survey in accordance with Section 9.

9. Perform specific inspections and mechanical tests as recommended by the manufacturer.

10. Verify that as-left tap connections are as specified.

11. Verify the presence of surge arresters.

2. Electrical Tests

1. Perform resistance measurements through bolted connections with a low-resistance ohmmeter, if applicable, in accordance with Section 7.2.1.2.1.

2. Perform insulation-resistance tests winding-to-winding and each winding-to-ground.

Apply voltage in accordance with manufacturer’s published data. In the absence of manufacturer’s published data, use Table 100.5. Calculate polarization index.

3. Perform power-factor or dissipation-factor tests on all windings in accordance with the test equipment manufacturer’s published data.

*4. Perform a power-factor or dissipation-factor tip-up test on windings greater than 2.5 kV.

5. Perform turns-ratio tests at all tap positions.

*6. Perform an excitation-current test on each phase.

*7. Measure the resistance of each winding at each tap connection.

8. Measure core insulation resistance at 500 volts dc if the core is insulated and the core ground strap is removable.

*9. Perform an applied voltage test on all high- and low-voltage windings-to-ground. See ANSI/IEEE C57.12.91, Sections 10.2 and 10.9.

10. Verify correct secondary voltage, phase-to-phase and phase-to-neutral, after energization and prior to loading.

11. Test surge arresters in accordance with Section 7.19.

3. Test Values

3.1 Test Values – Visual and Mechanical

1. Control and alarm settings on temperature indicators shall operate within manufacturer’s recommendations for specified settings. (7.2.1.2.1.6)

2. Cooling fans shall operate. (7.2.1.2.1.7)

NETA Acceptance Testing Specifications 21

3. Compare bolted connection resistance values to values of similar connections. Investigate values which deviate from those of similar bolted connections by more than 50 percent of the lowest value. (7.2.1.2.1.8.1)

4. Bolt-torque levels shall be in accordance with manufacturer’s published data. In the absence of manufacturer’s published data, use Table 100.12. (7.2.1.2.1.8.2)

5. Results of the thermographic survey shall be in accordance with Section 9. (7.2.1.2.1.8.3)

6. Tap connections shall be left as found unless otherwise specified. (7.2.1.2.1.10)

3.2 Test Values – Electrical

1. Compare bolted connection resistance values to values of similar connections. Investigate values which deviate from those of similar bolted connections by more than 50 percent of the lowest value.

2. Minimum insulation-resistance values of transformer insulation shall be in accordance with manufacturer’s published data. In the absence of manufacturer’s published data, use Table 100.5. Values of insulation resistance less than this table or manufacturer’s recommendations should be investigated. The polarization index shall not be less than 1.0.

3. CH and CL power-factor or dissipation-factor values will vary due to support insulators and bus work utilized on dry transformers. The following shall be expected on CHL power factors:

Power transformers: 2.0 percent or less Distribution transformers: 5.0 percent or less Consult transformer manufacturer’s or test equipment manufacturer’s data for additional information.

4. Power-factor or dissipation-factor tip-up exceeding 1.0 percent shall be investigated.

5. Turns-ratio test results shall not deviate more than one-half percent from either the adjacent coils or the calculated ratio.

6. The typical excitation current test data pattern for a three-legged core transformer is two similar current readings and one lower current reading.

7. Temperature-corrected winding-resistance values shall compare within one percent of previously-obtained results.

8. Core insulation-resistance values shall not be less than one megohm at 500 volts dc.

9. AC dielectric withstand test voltage shall not exceed 75 percent of factory test voltage for one minute duration. DC dielectric withstand test voltage shall not exceed 100 percent of the ac rms test voltage specified in ANSI C57.12.91, Section 10.2 for one minute duration. If no evidence of distress or insulation failure is observed by the end of the total time of voltage application during the dielectric withstand test, the test specimen is considered to have passed the test.

NETA Acceptance Testing Specifications 22

10. Phase-to-phase and phase-to-neutral secondary voltages shall be in agreement with nameplate data.

11. Test results for surge arresters shall be in accordance with Section 7.19.

7.2.2 Transformers, Liquid-Filled

1. Visual and Mechanical Inspection

1. Compare equipment nameplate data with drawings and specifications.

2. Inspect physical and mechanical condition.

3. Inspect impact recorder prior to unloading.

4. Test dew point of tank gases, if applicable.

5. Inspect anchorage, alignment, and grounding.

6. Verify the presence of PCB content labeling.

7. Verify removal of any shipping bracing after placement.

8. Verify the bushings are clean.

9. Verify that alarm, control, and trip settings on temperature and level indicators are as specified.

10. Verify operation of alarm, control, and trip circuits from temperature and level indicators, pressure relief device, gas accumulator, and fault pressure relay, if applicable.

11. Verify that cooling fans and pumps operate correctly and have appropriate overcurrent protection.

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

1. Use of a low-resistance ohmmeter in accordance with Section 7.2.2.2.

2. Verify tightness of accessible bolted electrical connections by calibrated torque-wrench method in accordance with manufacturer’s published data or Table 100.12.

3. Perform thermographic survey in accordance with Section 9.

13. Verify correct liquid level in tanks and bushings.

14. Verify that positive pressure is maintained on gas-blanketed transformers.

15. Perform inspections and mechanical tests as recommended by the manufacturer.

16. Test load tap-changer in accordance with Section 7.12.

NETA Acceptance Testing Specifications 23

17. Verify presence of transformer surge arresters.

18. Verify de-energized tap-changer position is left as specified.

2. Electrical Tests

1. Perform resistance measurements through bolted connections with a low-resistance ohmmeter, if applicable, in accordance with Section 7.2.2.1.

2. Perform insulation-resistance tests, winding-to-winding and each winding-to-ground.

Apply in accordance with manufacturer’s published data. In the absence of manufacturer’s published data, use Table 100.5. Calculate polarization index.

3. Perform turns-ratio tests at all tap positions.

4. Perform insulation power-factor or dissipation-factor tests on all windings in accordance with test equipment manufacturer’s published data.

5. Perform power-factor or dissipation-factor tests on each bushing equipped with a power-factor/ capacitance tap. In the absence of a power-factor/ capacitance tap, perform hot-collar tests. These tests shall be in accordance with the test equipment manufacturer’s published data.

6. Perform excitation-current tests in accordance with test equipment manufacturer’s published data.

7. Measure the resistance of each high-voltage winding in each no-load tap-changer position. Measure the resistance of each low-voltage winding in each load tap-changer position, if applicable.

*8. If core ground strap is accessible, remove and measure core insulation resistance at 500 volts dc.

*9. Measure the percentage of oxygen in the gas blanket, if applicable.

10. Remove a sample of insulating liquid in accordance with ASTM D 923. Sample shall be tested for the following.

1. Dielectric breakdown voltage: ASTM D 877 and/or ASTM D 1816

2. Acid neutralization number: ANSI/ASTM D 974

*3. Specific gravity: ANSI/ASTM D 1298

4. Interfacial tension: ANSI/ASTM D 971 or ANSI/ASTM D 2285

5. Color: ANSI/ASTM D 1500

6. Visual Condition: ASTM D 1524

*7. Water in insulating liquids: ASTM D 1533. (Required on 25 kV or higher voltages and on all silicone-filled units.)

NETA Acceptance Testing Specifications 24

*8. Power factor or dissipation factor in accordance with ASTM D 924.

11. Remove a sample of insulating liquid in accordance with ASTM D 3613 and perform dissolved-gas analysis (DGA) in accordance with ANSI/IEEE C57.104 or ASTM D3612.

12. Test instrument transformers in accordance with Section 7.10.

13. Test surge arresters in accordance with Section 7.19, if applicable.

14. Test transformer neutral grounding impedance device, if applicable.

3. Test Values

3.1 Test Values – Visual and Mechanical

1. Alarm, control, and trip circuits from temperature and level indicators as well as pressure relief device and fault pressure relay shall operate within manufacturer’s recommendations for their specified settings. (7.2.2.1.10)

2. Cooling fans and pumps shall operate. (7.2.2.1.11)

3. Compare bolted connection resistance values to values of similar connections. Investigate values which deviate from those of similar bolted connections by more than 50 percent of the lowest value. (7.2.2.1.12.1)

4. Bolt-torque levels shall be in accordance with manufacturer’s published data. In the absence of manufacturer’s published data, use Table 100.12. (7.2.2.1.12.2)

5. Results of the thermographic survey shall be in accordance with Section 9. (7.2.2.1.12.3)

6. Liquid levels in the transformer tanks and bushings shall be within indicated tolerances.

(7.2.2.1.13)

7. Positive pressure shall be indicated on pressure gauge for gas-blanketed transformers.

(7.2.2.1.14)

3.2 Test Values – Electrical

1. Compare bolted connection resistance values to values of similar connections. Investigate values which deviate from those of similar bolted connections by more than 50 percent of the lowest value.

2. Minimum insulation-resistance values of transformer insulation shall be in accordance with manufacturer’s published data. In the absence of manufacturer’s published data, use Table 100.5. Values of insulation resistance less than this table or manufacturer’s recommendations should be investigated. The polarization index shall be compared to previously obtained results and shall not be less than 1.0.

3. Turns-ratio test results shall not deviate by more than one-half percent from either the adjacent coils or the calculated ratio.

NETA Acceptance Testing Specifications 25

4. Maximum winding insulation power-factor/dissipation-factor values of liquid-filled transformers shall be in accordance with the manufacturer’s published data. In the absence of manufacturer’s published data use Table 100.3.

5. Investigate bushing power-factor and capacitance values that vary from nameplate values by more than ten percent. Hot-collar tests are evaluated on a milliampere/milliwatt loss basis, and the results should be compared to values of similar bushings.

6. Typical excitation-current test data pattern for a three-legged core transformer is two similar current readings and one lower current reading.

7. Temperature corrected winding-resistance values shall compare within one percent of previously obtained results.

8. Core insulation values shall be comparable to previously obtained results but not less than one megohm at 500 volts dc.

9. Investigate the presence of oxygen in the nitrogen gas blanket.

10. Insulating liquid values shall be in accordance with Table 100.4.

11. Evaluate results of dissolved-gas analysis in accordance with ANSI/IEEE Standard C57.104.

12. Results of electrical tests on instrument transformers shall be in accordance with Section 7.10.

13. Results of surge arrester tests shall be in accordance with Section 7.19.

14. Compare grounding impedance device values to manufacturer’s published data.

7.3.1 Cables, Low-Voltage, Low-Energy

1. Not used

7.3.2 Cables, Low-Voltage, 600-Volt Maximum

1. Not used.

7.3.3 Cables, Medium- and High-Voltage

1. Visual and Mechanical Inspection

1. Compare cable data with drawings and specifications.

2. Inspect exposed sections of cables for physical damage.

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

1. Use of a low-resistance ohmmeter in accordance with Section 7.3.3.2.

NETA Acceptance Testing Specifications 26 wrench method in accordance with manufacturer’s published data or Table 100.12.

3. Perform a thermographic survey in accordance with Section 9.

4. Inspect compression-applied connectors for correct cable match and indentation.

5. Inspect shield grounding, cable supports, and terminations.

6. Verify that visible cable bends meet or exceed ICEA and manufacturer’s minimum published bending radius.

*7. Inspect fireproofing in common cable areas.

8. If cables are terminated through window-type current transformers, inspect to verify that neutral and ground conductors are correctly placed and that shields are correctly terminated for operation of protective devices.

9. Inspect for correct identification and arrangements.

10. Inspect cable jacket and insulation condition.

2. Electrical Tests

1. Perform resistance measurements through bolted connections with a low-resistance ohmmeter, if applicable, in accordance with Section 7.3.3.1.

2. Perform an insulation-resistance test individually on each conductor with all other conductors and shields grounded. Apply voltage in accordance with manufacturer’s published data. In the absence of manufacturer’s published data, use Table 100.1.

3. Perform a shield-continuity test on each power cable.

4. In accordance with ICEA, IEC, IEEE and other power cable consensus standards, testing can be performed by means of direct current, power frequency alternating current, or very low frequency alternating current. These sources may be used to perform insulation-withstand tests, and baseline diagnostic tests such as partial discharge analysis, and power factor or dissipation factor. The selection shall be made after an evaluation of the available test methods and a review of the installed cable system. Some of the available test methods are listed below.

4.1. Dielectric Withstand

1. Direct current (dc) dielectric withstand voltage

2. Very low frequency (VLF) dielectric withstand voltage

3. Power frequency (50/60 Hz) dielectric withstand voltage

NETA Acceptance Testing Specifications 27

4.2. Baseline Diagnostic Tests

1. Power factor/ dissipation factor (tan delta)

1. Power frequency (50/60 Hz)

2. Very low frequency (VLF)

2. DC insulation resistance

3. Off-line partial discharge

1. Power frequency (50/60 Hz)

2. Very low frequency (VLF)

3. Test Values

3.1 Test Values – Visual and Mechanical

1. Compare bolted connection resistance values to values of similar connections. Investigate values which deviate from those of similar bolted connections by more…