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ANSI/NETA ATS-2025 Standard for Acceptance Testing Specifications for Electrical Power Equipment and Systems, 2025
- Copyright
- FOREWORD
- PREFACE
- CONTENTS
- 1. GENERAL SCOPE
- 2. APPLICABLE REFERENCES [Go to Page]
- 2.1 Codes, Standards, and Specifications
- 2.2 Other References
- 2.3 Contact Information
- 3. QUALIFICATIONS OF TESTING ORGANIZATION AND PERSONNEL [Go to Page]
- 3.1 Testing Organization
- 3.2 Testing Personnel
- 4. DIVISION OF RESPONSIBILITY [Go to Page]
- 4.1 The Owner’s Representative
- 4.2 The Testing Organization
- 5. GENERAL [Go to Page]
- 5.1 Safety and Precautions
- 5.2 Suitability of Test Equipment
- 5.3 Test Instrument Calibration
- 5.4 Test Report
- 5.5 Test Decal
- 6. POWER SYSTEM STUDIES [Go to Page]
- 6.1 Short-Circuit Studies
- 6.2 Coordination Studies
- 6.3 Incident Energy Analysis
- 6.4 Load-Flow Studies
- 6.5 Stability Studies
- 6.6 Harmonic-Analysis Studies
- 7. INSPECTION AND TEST PROCEDURES [Go to Page]
- 7.1.1 Switchgear and Switchboard Assemblies [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.1.2 Panelboard Assemblies [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.2.1.1 Transformers, Dry-Type, Air-Cooled, Low-Voltage, Small [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.2.1.2 Transformers, Dry-Type, Air-Cooled, Large [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.2.2 Transformers, Liquid-Filled [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.3.1 Cables, Low-Voltage, Low-Energy
- 7.3.2 Cables, Low-Voltage, 1,000-Volt Maximum [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.3.3 Shielded Cables, Medium- and High-Voltage [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.4 Metal-Enclosed Busways [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.5.1.1 Switches, Air, Low-Voltage [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.5.1.2 Switches, Air, Medium-Voltage, Metal-Enclosed [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.5.1.3 Switches, Air, Medium- and High-Voltage, Open [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.5.2 Switches, Oil, Medium-Voltage [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.5.3 Switches, Vacuum, Medium-Voltage [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.5.4 Switches, SF6, Medium-Voltage [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.5.5 Switches, Cutouts [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.6.1.1.1 Circuit Breakers, Low-Voltage, Molded-Case [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.6.1.1.2 Circuit Breakers, Low-Voltage, Insulated Case [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.6.1.2 Circuit Breakers, Low-Voltage, Power [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.6.1.3 Circuit Breakers, Air, Medium-Voltage [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.6.2 Circuit Breakers, Oil, Medium- and High-Voltage [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.6.3 Circuit Breakers, Vacuum, Medium-Voltage [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.6.4 Circuit Breakers, SF6 [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.7 Circuit Switchers [Go to Page]
- A. Visual and Mechanical Inspection
- B Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.8 Network Protectors, 600-Volt Class [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.9.1 Protective Relays, Electromechanical and Solid-State [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.9.2 Protective Relays, Microprocessor-Based [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.10.1 Instrument Transformers, Current Transformer [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests – Current Transformers
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.10.2 Instrument Transformers, Voltage Transformers [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.10.3 Instrument Transformers, Coupling-Capacitor Voltage Transformers [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Coupling Capacitor Voltage Transformers
- 7.10.4 Instrument Transformers, High-Accuracy Instrument Transformers
- 7.11.1 Metering Devices, Electromechanical and Solid-State [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.11.2 Metering Devices, Microprocessor-Based [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.12.1.1 Regulating Apparatus, Voltage, Step Voltage Regulators [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.12.1.2 Regulating Apparatus, Voltage, Induction Regulators
- 7.12.2 Regulating Apparatus, Current
- 7.12.3 Regulating Apparatus, Load Tap-Changers [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.13 Grounding Systems [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.14 Ground-Fault Protection Systems, Low-Voltage [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.15.1 Rotating Machinery, AC Induction Motors and Generators [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.15.2 Rotating Machinery, Synchronous Motors and Generators [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.15.3 Rotating Machinery, DC Motors and Generators [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.16.1.1 Motor Control, Motor Starters, Low-Voltage [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.16.1.2 Motor Control, Motor Starters, Medium-Voltage [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 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 [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.18.1.1 Direct-Current Systems, Batteries, Flooded Lead-Acid [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.18.1.2 Direct-Current Systems, Batteries, Vented Nickel-Cadmium [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.18.1.3 Direct-Current Systems, Batteries, Valve-Regulated Lead-Acid [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.18.2 Direct-Current Systems, Chargers [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.18.3 Direct-Current Systems, Rectifiers
- 7.19.1 Surge Protective Devices, Low-Voltage [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.19.2 Surge Arresters, Medium- and High-Voltage [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.20.1 Capacitors [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.20.2 Capacitor Control Devices
- 7.20.3.1 Reactors (Shunt and Current-Limiting) Dry-Type [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.20.3.2 Reactors (Shunt and Current-Limiting) Liquid-Filled [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.20.4 Resistors [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.21 Outdoor Bus Structures [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.22.1 Emergency Systems, Engine Generator [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical and Mechanical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.22.2 Emergency Systems, Uninterruptible Power Systems [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.22.3 Emergency Systems, Automatic Transfer Switches [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.23 Automation Systems and Communications [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.24.1 Automatic Circuit Reclosers and Line Sectionalizers, Automatic Circuit Reclosers, Oil/Vacuum [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.24.2 Automatic Circuit Reclosers and Line Sectionalizers, Automatic Line Sectionalizers, Oil [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.25 Fiber-Optic Cables [Go to Page]
- A. Visual and Mechanical Inspection
- B. Optical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Optical
- 7.26 Electric Vehicle Charging Systems [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.27 Arc Energy Reduction Systems
- 7.28 Battery Energy Storage Systems (BESS) [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.29 Solar Photovoltaic (PV) Systems [Go to Page]
- A. Visual and Mechanical Inspection
- B. Electrical Tests
- C. Test Values – Visual and Mechanical
- D. Test Values – Electrical
- 7.30 Wind Turbine Systems
- 8. SYSTEM FUNCTION TESTS AND COMMISSIONING
- 9. THERMOGRAPHIC SURVEY [Go to Page]
- 1. Visual and Mechanical Inspection
- 2. Thermographic Survey Report
- 3. Test Parameters
- 4. Test Results
- 10. ELECTROMAGNETIC FIELD TESTING [Go to Page]
- 1. Procedure
- 2. Survey Report
- 11. ONLINE PARTIAL DISCHARGE SURVEY [Go to Page]
- 1. Inspection
- Table 100.1 Insulation Resistance Test Values, Electrical Apparatus andSystems Other Than Rotating Machinery
- Table 100.2 Switchgear Withstand Test Voltages
- Table 100.3 Recommended Dissipation Factor/Power Factor at 20° CLiquid-Filled Transformers, Regulators, and Reactors
- Table 100.4 Insulating Fluid Limits
- Table 100.4.2 Test Limits for Silicone Insulating Liquid in New Transformers
- Table 100.4.3 Typical Values for Less-Flammable Hydrocarbon InsulatingLiquid Received in New Equipment
- Table 100.5 Transformer Insulation Resistance Acceptance Testing
- Table 100.6 Medium-Voltage Cables Acceptance Test Values
- Table 100.6 Medium-Voltage Cables Acceptance Test Values
- Table 100.6.1 Extruded Dielectric Shielded Power Cables, DC Test Voltages
- Table 100.6.2 Laminated Dielectric Shielded Power Cable, DC Test Voltages
- Table 100.6.3 Shielded Power Cable VLF (0.1 Hz) Test Voltages
- Table 100.6.4 Shielded Power Cables, DAC Test Voltages for Offline PD Tests
- Table 100.6.5 Shielded Power Cable, AC (20 Hz-300 Hz) Test Voltages
- Table 100.6.6 VLF Tan Delta (TD), MV/HV Cable Test Voltages
- Table 100.6.7.1 Evaluation of TD Results, PE-based Insulations
- Table 100.6.7.2 Evaluation of Tan Delta Test Results, EPR Cable
- Table 100.7 Inverse Time Trip Test at 300% of Rated Continuous Current ofCircuit Breakers, Molded-Case Circuit Breakers
- Table 100.8 Instantaneous Trip Tolerances for Field Testing of CircuitBreakers
- Table 100.9 Instrument Transformer Dielectric Tests, Field Acceptance
- Table 100.10 Unfiltered Housing Vibration Limits
- Table 100.10 Unfiltered Housing Vibration Limits
- Table 100.11 Insulation Resistance Test Values, Rotating Machinery for OneMinute at 40° C
- Table 100.12 US Standard Fasteners, Bolt Torque Values for ElectricalConnections
- Table 100.12.1 Bolt-Torque Values for Electrical Connections, US StandardFasteners1, Heat-Treated Steel – Cadmium or Zinc Plated2
- Table 100.12.2 US Standard Fasteners1, Silicon Bronze Fasteners2 3, Torque(Pound-Feet)
- Table 100.12.3 US Standard Fasteners1, Aluminum Alloy Fasteners2 3, Torque(Pound-Feet)
- Table 100.12.4 US Standard Fasteners1, Stainless Steel Fasteners2 3, Torque(Pound-Feet)
- Table 100.13 SF6 Gas Tests
- Table 100.14 Insulation Resistance Conversion Factors
- Table 100.14.1 Insulation Resistance Conversion Factors (20° C)
- Table 100.14.2 Insulation Resistance Conversion Factors (40° C)
- Table 100.15 High-Potential Test Voltage for Automatic Circuit Reclosers
- Table 100.16 High-Potential Test Voltage for Acceptance Testing of LineSectionalizers
- Table 100.17 Dielectric Withstand Test Voltages Metal-Enclosed Bus
- Table 100.18 Thermographic Survey, Suggested Actions Based on TemperatureRise
- Table 100.19 Dielectric Withstand Test Voltages for Electrical Apparatus Otherthan Inductive Equipment
- Table 100.20 Rated Control Voltages and their Ranges for Circuit Breakers
- Table 100.20.1 Rated Control Voltages and Their Ranges for Circuit Breakers
- Table 100.20.2 Rated Control Voltages and Their Ranges for Circuit BreakersSolenoid-Operated Devices
- Table 100.22 Minimum Bending Radius for Medium Voltage Power Cables,Single and Multiple Conductor
- Table 100.23 Online Partial Discharge Survey
- Table 100.23.1 Online Partial Discharge Survey, Suggested Actions Based onNature and Strength of Signal (TEV)
- Table 100.23.2 Online Partial Discharge Survey, Suggested Actions Based onNature and Strength of Signal (HFCT)
- Table 100.23.3 Online Partial Discharge Survey, Suggested Actions Based onNature and Strength of Signal (UHF)
- Table 100.23.4 Online Partial Discharge Survey, Suggested Actions Based onNature and Strength of Signal (VIS)
- Table 100.23.5 Online Partial Discharge Survey, Suggested Actions Based onNature and Strength of Signal (Contact/Airborne Acoustic)
- Appendix A - Definitions
- Appendix B - Guidance for Circuit Reliability Considerations for Medium and High Voltage Cable Methods of Test
- Appendix C - About the InterNational Electrical Testing Association
- Appendix D - Form for Comments
- Appendix E - Form for Proposals [Go to Page]
