1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULMarch 18, 20141UL 9741Outline of Investigation for Bidirectional Electric Vehicle (EV) ChargingSystem EquipmentIssue Number: 1MARCH 18, 2014Summary of TopicsThis is the first issue of the Outline
2、 of Investigation for BidirectionalElectric Vehicle (EV) Charging System Equipment, UL 9741.ULs Outlines of Investigation are copyrighted by UL. Neither a printed norelectronic copy of an Outline of Investigation should be altered in any way. All ofULs Outlines of Investigation and all copyrights, o
3、wnerships, and rights regardingthose Outlines of Investigation shall remain the sole and exclusive property of UL.COPYRIGHT 2014 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULMARCH 18, 2014UL 97412No Text on Thi
4、s PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .72 Glossary .83 Components 124 Units of Measurement 135 References 13CONSTRUCTION6 Frame and Enclosure 136.1 General 136.2 Access covers 146.3 Cast metal enclos
5、ures .146.4 Sheet metal enclosures 156.5 Nonmetallic enclosures .176.6 Glass covered openings 186.7 Openings for wiring 186.8 Openings in an enclosure 206.9 Enclosure bottom openings .206.10 Enclosure top openings .237 Protection of Users Accessibility of Uninsulated Live Parts, Film-Coated Wire, an
6、d Moving Parts and User Servicing 237.1 General 237.2 User servicing .308 Electric Shock .308.1 Voltage 308.2 Stored energy .328.3 Personnel protection systems .339 Mounting 3410 Corrosion Protection 3411 Mechanical Assembly .3512 Switches and Controls .3613 Supply Connections .3713.1 Fixed units 37
7、13.2 Openings for conduit or cable connection .4113.3 Openings for Class 2 circuit conductors .4113.4 Cord-connected units .4113.5 Strain relief 4213.6 Bushings 4213.7 Identification .4214 Wire Bending Space 4315 External Connections and Wiring .4716 EV Bonding 4817 Equipment Grounding Input Circuit
8、s .4818 Bonding of Internal Parts 5019 Internal Wiring 5219.1 Wires .5219.2 Protection of wiring .5320 Current-Carrying Parts 53MARCH 18, 2014 UL 9741 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL20.1 General .5320.2 Bus bars 5420.3 Live h
9、eat sinks .5721 Electrical Connections .5722 Spacings 5822.1 General .5822.2 Insulation barriers 6223 Alternate Spacings Clearances and Creepage Distances 6324 Control Circuits .6325 Accessible Signal Circuits 6526 Transformers .6626.1 General .6626.2 Coil insulation 6727 Separation of Circuits .692
10、7.1 Factory wiring 6927.2 Separation barriers .7027.3 Field wiring 7028 Overcurrent Protection 7128.1 General .7128.2 Control circuits .7229 Motors .7330 Capacitors .7431 Resistors 7532 Lampholders .7533 Printed Wiring Boards .7534 Insulating Materials .7635 Adhesives .7636 Protection of Service Per
11、sonnel 7737 Electronic Protection Circuits .78PROTECTION OF USERS AGAINST INJURY38 General 7939 Sharp Edges .8040 Enclosures and Guards 8041 Materials .8142 Impact Guards Over Moving Parts 8143 Drop Test 8144 Stability 8145 Static Load Test 8246 Strength of Handles .82PERFORMANCE47 General 8248 Leak
12、age Current Test .8349 Leakage Current Test Following Humidity Conditioning 8750 Power Input Test .8751 Temperature Test .8852 Dielectric Voltage-Withstand Test .9352.1 General .9352.2 Maximum-voltage measurements .9352.3 AC and DC power circuits .93MARCH 18, 2014UL 97414UL COPYRIGHTED MATERIAL NOT
13、AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL52.4 Secondary circuits 9452.5 Induced potential .9553 Volt-Ampere Capacity Measurement 9554 EPS Harmonics Susceptibility 9655 EPS Imbalance Test 9656 Abnormal Tests .9656.1 General .9656.2 Transformer burnout test 9856.3 T
14、ransformer overload test 10056.4 Short circuit test .10156.5 Capacitor fault test 10156.6 Forced ventilation test .10156.7 Component short- and open-circuit test 10256.8 Electrolytic capacitor fault test 10256.9 Vibration test .10256.10 Absence of cooling means test 10357 Flanged Bobbin Transformer
15、Abnormal Test 10358 Strain Relief Tests .10558.1 General 10558.2 Strain relief - Pull test 10558.3 Strain relief Push back test .10659 Flexing Test .10660 Grounding Impedance Test .10661 Overcurrent Protection Calibration Test .10762 Strength of Terminal Insulating Base and Support Test .10763 Bondi
16、ng Conductor Test 10864 Impact on Glass Covered Openings .10965 Evaluation of Reduced Spacings on Printed-Wiring Boards .10965.1 General 10965.2 Shorted trace test .10966 Heat Sink Temperature Cycling Test .10967 Tests for Permanence of Cord Tag 11067.1 General 11067.2 Test conditions .11067.3 Test
17、method 11168 Tests on Transformer Insulating Materials 11169 Bus Bar Tests .11170 Charging Harmonic Distortion Test .11271 Impact Guards Over Moving Parts Test .11372 Drop Test .11373 Stability Tests .11474 Static Load Test .11475 Strength of Handles Test .115MANUFACTURING AND PRODUCTION TESTS76 Pro
18、duction-Line Dielectric Voltage-Withstand Test .11577 Production-Line Grounding-Continuity Test .116RATINGS78 Details .117MARCH 18, 2014 UL 9741 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULMARKING79 Details .11779.1 General 11779.2 Conten
19、t 11779.3 Cautionary markings .120INSTRUCTIONS80 Instruction Manual .12381 Important Safety Instructions 12482 Assembly Instructions 13083 Operating Instructions 13184 Maintenance Instructions .13185 Moving and Storage Instructions .131OUTDOOR-USE UNITS86 General 13287 Construction 13288 Performance
20、 13488.1 Rain test .13488.2 Accelerated aging gasket tests .13788.3 Metallic coating thickness 13889 Marking 13990 Utility Grid Interaction 13990.1 General 13990.2 Utility grid interactive inverter .14090.3 Special purpose utility interactive products .14091 On Board Equipment .143APPENDIX AStandard
21、s for ComponentsA1Appendix BApplication of Personnel Protection Requirements from UL 2231-1 and UL 2231-2B1 General .B1MARCH 18, 2014UL 97416UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 These requirements cover bidire
22、ctional electric vehicle charging equipment that charge electricvehicles from an electric power system and also include functionality to export power from the electricvehicle to an electric power system. When commanded to do so, the bidirectional charging equipmentexports electric power from the ele
23、ctric vehicle stored energy supply to the electric power system (EPS)to supply power to common loads.1.2 For the purposes of this standard, the term electric vehicle, designated throughout by the initialsEV, is considered to cover electric vehicles, hybrid electric vehicles, and plug-in versions of
24、thesevehicles.1.3 For utility-interactive equipment, these requirements are intended to supplement and be used inconjunction with the Standard for Interconnecting Distributed Resources With Electric Power Systems,IEEE 1547, and the Standard for Conformance Test Procedures for Equipment Interconnecti
25、ngDistributed Resources with Electric Power Systems, IEEE 1547.1.1.4 The power export functionality will include enable and disable functions to prevent EPS export forsome locations that are not capable of receiving backfed power.1.5 The products covered by these requirements are intended to be inst
26、alled in accordance with theNational Electrical Code, NFPA 70.1.6 The equipment includes off board and on board equipment. Off-board equipment may be consideredfor indoor use only or indoor/outdoor use. On board equipment is always considered outdoor use. Offboard equipment is intended to be install
27、ed in accordance with the National Electrical Code, NFPA 70.Onboard equipment is intended to be installed in accordance with the manufacturers specifications.1.7 Equipment that is not a complete assembly and depends upon installation in an end product forcompliance with the requirements in this stan
28、dard is investigated under the requirements of this standardand the standard for the end product. On board chargers that rely upon specific installation requirementswithin an EV for compliance with the requirements in this standard, are to be evaluated based on thoseinstallation requirements and equ
29、ipment.1.8 These requirements do not cover battery chargers covered by the Standard for Battery Chargers forCharging Engine-Starter Batteries, UL 1236, or the Standard for Industrial Battery Chargers, UL 1564.1.9 The requirements for devices or systems intended to reduce the risk of electric shock t
30、o the user ingrounded or isolated circuits for charging electric vehicles are covered in the Standard for PersonnelProtection Systems for Electric Vehicle (EV) Supply Circuits; Part 1: General Requirements, UL 2231-1,and the Standard for Personnel Protection Systems for Electric Vehicle (EV) Supply
31、Circuits; Part 2:Particular Requirements for Protective Devices for Use in Charging Systems, UL 2231-2.MARCH 18, 2014 UL 9741 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL2 Glossary2.1 In the text of this standard, the term unit refers to
32、any product covered by this standard. The lettersEV refers to an electric vehicle, a hybrid electric vehicle, or plug-in versions of these vehicles inaccordance with 1.2. For the purpose of this standard, the definitions in 2.2 2.53 apply.2.2 ACCESSIBLE Able to be contacted by an accessibility probe
33、.2.3 BARRIER A part inside an enclosure that reduces access to a part that involves a risk of fire,electric shock, injury to persons, or electrical energy-high current levels.2.4 BASIC INSULATION The insulation required for the proper functioning of a device, and for basicprotection against electric
34、al hazard.2.5 BATTERY, VALVE-REGULATED A battery in which the venting of the products of electrolysis iscontrolled by a reclosing pressure-sensitive valve.2.6 BATTERY, VENTED A battery in which the products of electrolysis and evaporation are allowedto escape freely to the atmosphere.2.7 BRANCH CIRC
35、UIT The portion of the building wiring system beyond the final overcurrentprotective device on the power-distribution panel that protects the circuit to the field-wiring terminals in apermanently connected unit or to the receptacle outlet for a cord-connected unit.2.8 CELL Two electrodes of dissimil
36、ar material separated from one another by a common ionicallyconductive electrolyte, that is intended to convert chemical energy directly into electrical energy.2.9 CHARGING CIRCUIT-INTERRUPTING DEVICE (CCID) A device that continuously monitors thedifferential current among all of the current-carryin
37、g line conductors in a grounded system and rapidlyinterrupts the circuit under conditions where the differential current exceeds the rated MeasurementIndication Unit (MIU) value of a charging circuit-interrupting device. The device is identified by the lettersCCID followed by the differential trip c
38、urrent rating of either 5 or 20 indicating the tripping rating in MIU.2.10 CLASS 2 TRANSFORMER A step-down transformer complying with the applicablerequirements in:a) The Standard for Low Voltage Transformers Part 1: General Requirements, UL 5085-1,and the Standard for Low Voltage Transformers Part
39、3: Class 2 and Class 3 Transformers,UL 5085-3, orb) The Standard for Class 2 Power Units, UL 1310.2.11 CONTROL CIRCUIT A circuit that carries electric signals but not main power current.2.12 DOUBLE INSULATION An insulation system comprised of both basic insulation andsupplementary insulation.2.13 EL
40、ECTRIC POWER SYSTEM (EPS) Equipment or facilities that deliver electric power to aload. The most common example of an EPS is an electric utility.MARCH 18, 2014UL 97418UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL2.14 ELECTRIC VEHICLE (EV) A
41、n over-the-road automotive-type vehicle for highway use, such asa passenger automobile, bus, truck, van, or similar vehicle, which receives primary or supplementarypower from an electric motor that draws current from a rechargeable storage battery. This term is usedto cover electric vehicles, hybrid
42、 electric vehicles and plug-in versions of these vehicles in accordancewith 1.2.2.15 ELECTRIC VEHICLE SUPPLY EQUIPMENT (EVSE) The conductors, including theungrounded, grounded, and equipment grounding conductors, and the electric vehicle connectors,attachment plugs, and all other fittings, devices,
43、power outlets, or apparatus installed specifically for thepurpose of transferring energy between the premises wiring and the electric vehicle. This includes all offboard equipment whether unidirectional or bidirectional, and includes power conditioning functions,metering functions, safety functions,
44、 and supportive communications and controls.2.16 ELECTROLYTE A semisolid, liquid, or aqueous salt solution that makes ionic conductionbetween positive and negative electrodes of a cell possible.2.17 ENCLOSURE That portion of a unit that reduces the accessibility of a part that involves a riskof fire
45、, electric shock or injury to persons, or reduces the risk of propagation of flame, sparks, andmolten metal initiated by an electrical disturbance occurring within.2.18 EXPOSED Visible and able to be contacted by an accessibility probe.2.19 FIELD-WIRING LEAD Any lead to which a supply, load, or othe
46、r wire is intended to beconnected by an installer.2.20 FIELD-WIRING TERMINAL A terminal to which a supply, load, or other wire is intended to beconnected by an installer.2.21 FIXED UNIT A unit that is intended to be permanently connected electrically.2.22 GUARD A part that reduces access to a compon
47、ent that results in a risk of injury to persons.See Enclosures and Guards, Section 40.2.23 GROUND FAULT (GF) An unintentional electrical path between a part operating normally atsome potential to ground, and ground.2.24 GROUNDING MONITOR/INTERRUPTER (GM/I) A device that monitors equipment groundingc
48、ontinuity in a charging system, and either prevents the charger circuitry from becoming energizedunder conditions where the grounding is not available or interrupts the circuit under conditions wherethe grounding is lost during operation.2.25 INTERCONNECTION SYSTEM EQUIPMENT (ISE) A component or sys
49、tem of components thatperforms protective and control functions used to interconnect a distributed resource to an EPS.2.26 INVERTER An electronic device that changes dc power to ac power.2.27 IscMAX Absolute maximum prospective short circuit current (a.c. or d.c) that a input or outputof the equipment is rated to have connected to it.2.28 ISOLATED CIRCUIT A circuit that has no intentional connection to ground.MARCH 18, 2014 UL 9741 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORD
