UL SUBJECT 6703-2011 OUTLINE OF INVESTIGATION FOR CONNECTORS FOR USE IN PHOTOVOLTAIC SYSTEMS (Issue 3)《在光伏系统中使用的连接器调查大纲》.pdf

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1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULDecember 14, 20111SUBJECT 6703OUTLINE OF INVESTIGATIONFORCONNECTORS FOR USE IN PHOTOVOLTAIC SYSTEMSIssue Number: 3DECEMBER 14, 2011Summary of TopicsThe third issue of the Outline of Investigation

2、 for Connectors for Use inPhotovoltaic Systems, Subject 6703, includes the following revision: Revised TPE maximum compression set value in Table 9.2.The UL Foreword is no longer located within the UL Outline of Investigation. Forinformation concerning the use and application of the requirements con

3、tained inthis Outline of Investigation, the current version of the UL Foreword is located onULStandardsInfoNet at: http:/ 2011 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULDECEMBER 14, 2011SUBJECT 67032No Text

4、on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .42 General 42.1 Units of measurement .42.2 References 43 Components 4CONSTRUCTION4 General 55 Current Carrying Parts (Contacts) .56 Insulating Materials a

5、nd Enclosure 57 Spacings .88 Accessibility of Uninsulated Live Parts .9PERFORMANCE9 PV Connector Tests 109.1 General 109.2 Locking test 119.3 Gasket tests 11MARKINGS10 General 13APPENDIX AStandards for ComponentsA1DECEMBER 14, 2011 SUBJECT 6703 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REP

6、RODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 This Outline covers latching or locking type PV connectors rated 1000 V dc or less. These connectorsare intended for use in wiring methods detailed in Part IV of Article 690 Solar Photovoltaic Systems ofthe National Electrical

7、 Code, NFPA 70.1.2 PV connectors are suitable for the termination of single, insulated, stranded copper type USE-2 orPhotovoltaic Wire (PV Wire) rated 90C, 105C, 125C, or 150C dry; 90C wet; 600, 1000, or 2000 V.2 General2.1 Units of measurement2.1.1 The requirements in this outline are stated in met

8、ric units that make the requirement convenientlyuseable in countries employing the various metric systems (practical SI and customary). In addition tobeing stated in metric units, the inch/pound units, that are customary in the USA, are also provided. Thevalues given in SI (metric) units shall be no

9、rmative, except for AWG conductor sizes. Any other valuesgiven are for information purposes only.2.1.2 Equivalent although, not necessarily exactly identical results are to be expected from applyinga requirement in USA or metric terms. Equipment calibrated in metric units is to be used when arequire

10、ment is applied in metric terms.2.2 References2.2.1 Any undated reference to a code or standard appearing in the requirements of this Outline ofInvestigation shall be interpreted as referring to the latest edition of that code or standard.3 Components3.1 Except as indicated in 3.2, a component of a

11、product covered by this Outline of Investigation shallcomply with the requirements for that component. See Appendix A for a list of standards coveringcomponents generally used in the products covered by this Outline of Investigation.3.2 A component need not comply with a specific requirement that:a)

12、 Involves a feature or characteristic not needed in the application of the component in theproduct covered by this Outline of Investigation, orb) Is superseded by a requirement in this Outline of Investigation.3.3 A component shall be used in accordance with its recognized rating established for the

13、 intendedconditions of use.DECEMBER 14, 2011SUBJECT 67034UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL3.4 Specific components are recognized as being incomplete in construction features or restricted inperformance capabilities. Such compone

14、nts are intended for use only under limited conditions, such ascertain temperatures not exceeding specified limits, and shall be used only under those specific conditionsfor which they have been recognized.CONSTRUCTION4 General4.1 Only materials that are acceptable for the particular use shall be em

15、ployed in a PV connector. PVconnectors shall be made and finished with the degree of uniformity and grade of workmanship that arepracticable in a well-equipped factory.4.2 A PV connector shall comply with the requirements in the Standard for Wire Connectors, UL486A-486B, as appropriate, and with thi

16、s Outline of Investigation.4.3 There shall be no sharp edges or corners on the outer surface of a PV connector that can result indamage to the PV wire insulation that the connector contacts.4.4 Latching connectors shall not require the use of a tool to unlatch. Latching connectors shallincorporate a

17、 suitable latching mechanism such as ribs, twisting action, or other latching mechanismsbetween the mated pair.4.5 Locking connectors shall require the use of a tool to unlock.5 Current Carrying Parts (Contacts)5.1 The current-carrying part of a connector shall be copper or copper alloy.6 Insulating

18、 Materials and Enclosure6.1 Polymeric materials may be used as enclosure materials and in direct support of live parts. When thesame material is used for both purposes, the more stringent requirements shall be applied.6.2 A polymeric material serving as the enclosure of a part involving a risk of fi

19、re or electric shock shallcomply with the applicable requirements in the Standard for Polymeric Materials Use in ElectricalEquipment Evaluations, UL 746C, concerning:a) Ultraviolet light exposure,b) Water exposure and immersion, andc) Hot-wire ignition (HWI).6.3 A polymeric material serving as the e

20、nclosure shall have a minimum flammability classification of V-0,VTM-0 or 5VA as determined by tests described in the Standard for Tests for Flammability of PlasticMaterials for Parts in Devices and Appliances, UL 94. The material thickness for determining theflammability shall be measured at the th

21、innest points of the enclosure.DECEMBER 14, 2011 SUBJECT 6703 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL6.4 With reference to 6.3, a material other than V-0, VTM-0 or 5VA may be used when the enclosure ofthe PV wire connector complies w

22、ith the requirements for the equivalent flame test as specified in theStandard for Polymeric Materials Use in Electrical Equipment Evaluations, UL 746C.6.5 A polymeric material serving as the support or insulation of a part involving a risk of fire or electricshock shall:a) Have a flammability class

23、ification of HB, V-2, V-1, or V-0 as determined in accordance withthe Standard for Tests for Flammability of Plastic Materials for Parts in Devices and Appliances,UL 94. The material thickness for determining the flammability shall be measured at pointssupporting live parts or within 6 mm (0.236 in)

24、 of live parts, whichever is less;b) Have a minimum High-Current Arc Ignition (HAI) performance level category (PLC) inaccordance with Table 6.1;c) Have a Comparative Tracking Index (CTI) performance level category (PLC) as defined inTable 6.2;Exception: A material not having a CTI rating may be use

25、d when the material complies with therequirements for the Performance Tracking Index test (PTI) test as specified in the Standard forPolymeric Materials Use in Electrical Equipment Evaluations, UL 746C.d) Have an Inclined Plane Tracking (IPT) as defined in Table 6.2; ande) Comply with the requiremen

26、ts for exposure to ultraviolet light as determined in accordancewith the Standard for Polymeric Materials Use in Electrical Equipment Evaluations, UL 746C,when exposed to light during normal operation of the product. Polymeric materials that areexposed to direct sunlight but are protected by glass,

27、or other transparent medium, may betested with an equivalent layer of that medium attenuating the ultraviolet light exposure duringthe test.Table 6.1Minimum HAI PLC valuesFlammability classification High-current arc ignition, PLCHB 1V-2 2V-1 2V-0 3DECEMBER 14, 2011SUBJECT 67036UL COPYRIGHTED MATERIA

28、L NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULTable 6.2Determination of CTI or IPTVoltageaCreepage distance IPTbrequired CTIcrequired0 - 30 Any No No 30 - 600 30-600 12.7 mm No No 600 - 1000 600 - 1000 16.0 mm No NoaVoltage is the maximum potential difference bet

29、ween:live parts of different polarity, andlive parts and dead metal parts that may be grounded in service or exposed to contact.bRating of 1 h using the time to track method at the higher of the rated voltage or 1000 V when the voltage rating is in therange of 601-1000 V.cCTI PLC of 0, 1, or 2.6.6 P

30、olymeric materials employed as a part of the connector shall be suitable for its rated temperature.The relative thermal index (RTI), electrical, mechanical impact (IMP) and mechanical strength (STR), asdetermined in accordance with the Standard for Polymeric Materials Long Term Property Evaluations,

31、UL 746B, shall not be less than 20C (36F) above the maximum operating temperature rating for theconnector as specified by the manufacturer. For soft materials, such as elastomers, where the RTIMechanical IMP can not be determined, or for those connectors protected from impact under use, the RTImecha

32、nical IMP is not required.Note: Maximum Operating Temperature = lesser of Electrical RTI, Mechanical IMP RTI, and MechanicalSTR RTI 20C (36F).6.7 A polymeric material serving as the enclosure of a part involving a risk of fire or electric shock shallhave a relative thermal index (RTI), electrical, m

33、echanical IMP and mechanical STR, as determined inaccordance with the Standard for Polymeric Materials Long Term Property Evaluations, UL 746B, notless than 90C (194F).Exception: For PV connectors used in limited environmental conditions, a 75C minimum is permitted.Note: Limited environmental condit

34、ions are where the connector does not come in contact the back skinof a PV module.6.8 A barrier or liner of polymeric insulating material providing the sole insulation between a live part andan accessible metal part or between uninsulated live parts not of the same potential shall be of adequatethic

35、kness and of a material appropriate for the application. The barrier or liner shall be held in place andshall not be adversely affected to the extent that its necessary properties may fall below the minimumacceptable values for the application.6.9 Gaskets, seals and O rings shall not be used where t

36、hey may be subject to flexing during normaloperation and shall not deteriorate beyond limits permitted in the Gasket Tests, Section 9.3.DECEMBER 14, 2011 SUBJECT 6703 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL7 Spacings7.1 Connectors in

37、 the mated (male - female pair) condition shall comply with 7.2 7.7.7.2 Spacings between uninsulated live parts of different potentials, and between a live part and anaccessible metal part (or the probe detailed in Accessibility of Uninsulated Live Parts, Section 8), shall notbe less than the values

38、 specified in Tables 7.1 and 7.2.Table 7.1Minimum acceptable spacings for field wiring terminals other than tool applied crimp typeterminalsThrough air and over surfacePotential involved, V mm (in)0-50 6.4 (1/4)51-300 9.5 (3/8)301-600 12.7 (1/2)601-1000 15.9 (5/8)Table 7.2Minimum acceptable spacings

39、 for tool applied crimp type field wiring terminals and Minimumacceptable spacings for locations elsewhere than at wiring terminalsThrough air Over surfacePotential involved, V mm (in) mm (in)0-50 1.6 (1/16) 1.6 (1/16)51-300 3.2 (1/8) 6.4 (1/4)301-600 6.4 (1/4) 9.5 (3/8)601-1000 9.5 (3/8) 12.7 (1/2)

40、7.3 The spacings at a field-wiring terminal shall be measured with and without wire connected to theterminal. The wire shall be connected as it would be in actual use. If the terminal will properlyaccommodate it, and if the product is not marked to restrict its use, the wire shall be one size larger

41、 thanthat required; otherwise, the wire is to be the size required.7.4 Surfaces separated by a gap of 0.8 mm (0.031 in) or less are considered to be in contact with eachother for the purpose of judging over surface spacings.7.5 In Tables 7.1 and 7.2, the potential involved is the maximum voltage tha

42、t may exist between partsduring any anticipated use of the connector.7.6 A barrier or liner of electrical grade fiber providing the sole insulation between a live part and anaccessible metal part or between uninsulated live parts not of the same potential shall not be less than0.71 mm (0.028 in) thi

43、ck. The barrier or liner shall be reliably held in place.7.7 Connectors in the unmated condition shall have minimum spacings of 1.6 mm (1/16 in) for boththrough air and over surface between uninsulated live parts not of the same potential and between a livepart and an accessible metal part (or the p

44、robe detailed in Accessibility of Uninsulated Live Parts, Section8).DECEMBER 14, 2011SUBJECT 67038UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL8 Accessibility of Uninsulated Live Parts8.1 An accessible part of a connector shall not involve

45、a risk of electric shock.Exception: A part that is not energized when it is accessible need not comply with this requirement.8.2 In determining whether a part is energized, the connector is to be evaluated:a) Not mated, andb) Mated in any implied or described acceptable manner.In both cases, the con

46、nector is to be in the state described in 8.4.8.3 For voltages and currents between parts of the assembly of products, voltage is to be the maximumsystem voltage, current is to be the available current.8.4 A part is considered accessible if, in a fully assembled connector or connector pair (that is,

47、 with allmated pairs and covers in place) the part may be touched by the probe illustrated in Figure 8.1. A coveror mated pair that may be removed without the use of a tool is to be removed for purposes of thisrequirement.This is generated text for figtxt.Figure 8.1Probe for determining accessibilit

48、y of live partsDECEMBER 14, 2011 SUBJECT 6703 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL8.5 The probe illustrated in Figure 8.1 shall be applied to any depth that the opening will permit; and shallbe rotated or angled before, during, an

49、d after insertion through the opening to any position that isnecessary to examine the product. The probe shall be applied in any possible configuration; and, ifnecessary, the configuration shall be changed after insertion through the opening. The probe is to be usedas a measuring instrument to judge the accessibility provided by an opening, and not as an instrument tojudge the strength of a material; as such, it is to be applied with the minimum force necessary (1lb-f orless) to accurately de