UL Standard for Safety Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources
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INTRODUCTION 1 Scope 2 Glossary 2.1 General 2.2 PV rapid shutdown equipment and systems 3 Components 4 Units of measurement 5 References CONSTRUCTION 6 General 7 Frame and Enclosure 7.1 General 7.2 Access covers 7.3 Cast metal enclosures 7.4 Sheet metal enclosures 7.5 Nonmetallic enclosures 7.6 Openings covered by glass 7.7 Openings for wiring system connections 7.8 Openings for ventilation 7.9 Environmental rated enclosures 8 Protection Against Corrosion 9 Mechanical Assembly 10 Mounting 11 Protection of Users … Accessibility of Uninsulated Live Parts 12 Protection of Service Personnel 13 Electric Shock 13.1 Voltage 13.2 Stored energy 14 Switches and Controls 15 Disconnect Devices 15.1 General 15.2 Provision for locking 16 AC Output Connections 16.1 Stand-alone inverters 16.2 Utility-interactive inverters 17 Receptacles 18 Supply Connections 18.1 General 18.2 Wiring terminals 18.3 Wiring leads 18.4 Wiring compartments 18.5 Openings for conduit or cable connection 18.6 Openings for class 2 circuit conductors 19 Wire-Bending Space 20 Equipment Grounding 20.1 General 20.2 Grounding electrode terminal 21 AC Output Circuit Grounded Conductor 22 Internal Bonding for Grounding 23 Internal Wiring 23.1 General 23.2 Protection of wiring 23.3 Electrical connections 24 Live Parts 25 Separation of Circuits 25.1 Factory wiring 25.2 Field wiring 25.3 Separation barriers 26 Spacings 26.1 General 26.2 Insulating liners and barriers 27 Alternate Spacings … Clearances and Creepage Distances 28 Insulating Materials 28.1 General 28.2 Barriers 29 Capacitors 30 Isolated Accessible Signal Circuits 31 Control Circuits 32 Overcurrent Protection 32.1 General 32.2 Control circuit overcurrent protection 32.3 Output ac power circuit overcurrent protection 32.4 Battery circuits 33 Panelboard Features 34 DC Ground Fault Detector/Interrupter 35 Printed-Wiring Boards 36 External Transformers PROTECTION AGAINST RISKS OF INJURY TO PERSONS 37 General 38 Enclosures and Guards 39 Moving Parts 40 Switches and Controls 41 Mounting OUTPUT POWER CHARACTERISTICS AND INTERACTIVE COMPATIBILITY 42 General 43 Interactive Equipment PERFORMANCE 44 General 45 Maximum-Voltage Measurements 46 Temperature 47 Dielectric Voltage-Withstand Test 48 Output Power Characteristics 48.1 General 48.2 Output ratings 48.3 Input range 48.4 Harmonic distortion 49 Utility Compatibility 50 Abnormal Tests 50.1 General 50.2 Output overload test 50.3 Short-circuit test 50.4 DC input miswiring test 50.5 Ventilation test 50.6 Component short- and open-circuit 50.7 Load transfer test 50.8 Loss of control circuit 51 Grounding Impedance Test 52 Overcurrent Protection Calibration Test 53 Strain Relief Test 54 Reduced Spacings on Printed Wiring Boards Tests 54.1 General 54.2 Dielectric voltage-withstand test 54.3 Shorted trace test 55 Bonding Conductor Test 56 Voltage Surge Test 57 Calibration Test 58 Overvoltage Test 59 Current Withstand Test 60 Capacitor Voltage Determination Test 61 Stability 62 Static Load 63 Compression Test 64 Rain and Sprinkler Tests 64.1 General 64.2 Rain test 64.3 Sprinkler test RATING 65 Details MARKING 66 Details 67 Cautionary Markings 68 Equipment Information and Instructions 68.1 Separation of information 68.2 Operating and installation instructions 69 Important Safety Instructions MANUFACTURING AND PRODUCTION TESTS 70 Dielectric Voltage-Withstand Test 71 Production Tests for Interactive Equipment CHARGE CONTROLLERS INTRODUCTION 72 General CONSTRUCTION 73 General PERFORMANCE 74 General 75 Sources and Loads 76 Normal Operations 77 Temperature 78 Temperature Compensation 79 Connection Sequence 80 Abnormal Tests 80.1 General 80.2 Input and output faults 80.3 Charge controller miswiring 80.4 Low-voltage disconnect MARKING 81 Cautionary Markings 82 Details 83 Important Safety Instructions AC MODULES AND PV MODULES WITH INTEGRATED ELECTRONICS INTRODUCTION 84 General CONSTRUCTION 85 General PERFORMANCE 86 General 87 PV Module Mounted Equipment Securement Test 88 Module to Electronics Bonding RATING 89 General MARKING 90 Details 91 Important Safety Instructions RAPID SHUTDOWN EQUIPMENT AND SYSTEMS INTRODUCTION 92 General CONSTRUCTION 93 Protection of Emergency Personnel 94 Electrical Isolation Systems (EIS) 95 Initiators 96 PVRSS that Includes Disconnect Functionality 97 PVRSS and PVRSE Functional Safety 97.1 General 97.2 Conditions to be addressed for a PVRSS/PVRSE PERFORMANCE 98 General 98.1 Operational tests for PVRSS/PVRSE verification of levels … controlled conductors 98.2 Verification testing of PVRSS at rated extremes 98.3 Power supply grid support ride through 98.4 Inverters rated as PVRSE 98.5 Other equipment rated as PVRSE 99 Functional Safety Evaluation and Environmental Stress Testing For PVRSS/PVRSE RATINGS 100 General MARKING 101 Details 102 Installation Instructions SUPPLEMENT SA … GRID SUPPORT UTILITY INTERACTIVE EQUIPMENT PART 1 … GENERAL SA1 Scope SA2 Acronyms SA3 Definitions SA4 Construction SA5 Performance … Grid Support Utility Interactive SA5.1 General SA5.2 Grid support utility interconnection protection performance SA5.3 Test parameter tolerances SA5.4 Representative testing SA5.5 Abnormal tests SA6 Ratings, Markings and Instructions SA7 Manufacturing and Production Line Testing for Grid Support Utility Interactive Inverters PART 2 … SPECIFIC REQUIREMENTS AND TESTS FOR GRID SUPPORT UTILITY INTERACTIVE INVERTERS SA8 Anti-islanding Protection … Unintentional Islanding with Grid Support Functions Enabled SA8.1 General SA8.2 Test procedure SA8.3 Tests requirements SA9 L/HVRT Low and High Voltage Ride-Through SA9.1 Function L/HVRT … low and high voltage ride-through SA9.2 Must trip magnitude and duration SA10 L/HFRT Low and High Frequency Ride-Through SA10.1 General SA10.2 Test requirements SA10.3 Test procedure SA10.4 Ride-through test signal (step function) SA10.5 Must trip magnitude and duration SA11 RR … Normal Ramp Rate and SS … Soft-Start Ramp Rate SA11.1 General SA11.2 Procedure for normal ramp rate test SA11.3 Test requirements SA11.4 Procedure for soft-start ramp rate test SA11.5 Test requirements SA11.6 Ramp rate test profiles SA12 SPF … Specified Power Factor SA12.1 General SA12.2 Procedure for specified power factor test SA12.3 Test requirements SA13 Volt/VAr Mode [Q(V)] SA13.1 General SA13.2 Procedure for Volt-VAr "Q(V)" test SA13.3 Test requirements SA14 Frequency-Watt (FW) … Optional SA14.1 General SA14.2 EUT Specified Parameters SA14.3 Test procedure SA14.4 Test requirements SA15 Volt-Watt (VW) … Optional SA15.1 General SA15.2 EUT specified parameters SA15.3 Test procedure SA15.4 Test requirements SA16 Ratings for Grid Support Utility Interactive Inverters, Converters SA17 Disable Permit Service (Optional) SA17.1 General SA17.2 Test procedures SA17.3 Criteria SA18 Limit Active Power (Optional) SA18.1 General SA18.2 Test procedures SUPPLEMENT SB … GRID SUPPORT UTILITY-INTERACTIVE INVERTERS AND CONVERTERS BASED UPON IEEE 1547-2018 and IEEE 1547.1-2020 SB1 Scope SB2 Definitions SB3 Construction SB4 Performance … Grid Support Interactive SB4.1 General SB4.2 Grid support utility interconnection performance SB4.2A Performance Categories SB4.3 Additional requirements for testing according to IEEE 1547.1-2020 SB5 Ratings, Markings and Instructions SB6 Manufacturing and Production Line Testing SB7 Type Testing Results Reporting Annex A Standards for Components
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