1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULAugust 16, 20101SUBJECT 2277OUTLINE OF INVESTIGATIONFORFLEXIBLE MOTOR SUPPLY CABLE AND WIND TURBINE TRAY CABLEISSUE NUMBER: 3AUGUST 16, 2010Summary of TopicsThis is the Third Issue of the Outline
2、 of Investigation for Flexible MotorSupply Cable and Wind Turbine Tray Cable. This issue includes newconductor requirements for wind turbine tray cable of copper-cladaluminum or acceptable aluminum alloy conductors. This new issue alsoincreases the maximum conductor sizes for flexible motor supply c
3、able.COPYRIGHT 2010 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULAUGUST 16, 2010SUBJECT 22772No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION
4、 FROM ULCONTENTSINTRODUCTION1 Scope .42 Units of Measurement .43 Components 44 Undated References 5CONSTRUCTION5 Materials and Dimensions .5PERFORMANCE6 General 5MARKINGS7 Information on or in the Cable .68 Information on the Tag, Reel, or Carton .6AUGUST 16, 2010 SUBJECT 2277 3UL COPYRIGHTED MATERI
5、AL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 This outline covers the requirements for Wind Turbine Tray Cable (WTTC) rated 1000 volts, 90 -200C dry and optionally rated 90C wet. It also covers the requirements for Flexible Motor Supply Ca
6、blerated 1000 or 2000 volts and 90C dry. The cables are for use as noted in 1.2 1.4.1.2 Wind turbine power and control cable is intended to be installed in cable trays or raceways within awind turbine generator.1.3 Flexible motor supply cable (Flexible VFD Servo Cable) is intended for use with varia
7、ble frequencydrives subjected to non-linear power distortions.1.4 These cables are intended for use in accordance with the applicable parts of the National ElectricalCode (NEC), NFPA 70.2 Units of Measurement2.1 In addition to being stated in the inch/pound units that are customary in the USA, each
8、of therequirements in this outline is also stated in units that make the requirement conveniently usable incountries employing the metric system (practical SI). Equivalent although not necessarily exactlyidentical results are to be expected from applying a requirement in USA or metric terms. Equipme
9、ntcalibrated in metric units is to be used when a requirement is applied in metric terms.3 Components3.1 Except as indicated in 3.2, a component (including gaskets and polymeric materials) of a productcovered by this outline of investigation shall comply with the requirements for that component.3.2
10、A component is not required to comply with a specific requirement that:a) Involves a feature or characteristic not required 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
11、 shall be used in accordance with its rating established for the intended conditions ofuse.3.4 Specific components are incomplete in construction features or restricted in performance capabilities.Such components are intended for use only under limited conditions, such as certain temperatures notexc
12、eeding specified limits, and shall be used only under those specific conditions.AUGUST 16, 2010SUBJECT 22774UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL4 Undated References4.1 Any undated reference to a code or standard appearing in the re
13、quirements of this outline ofinvestigation shall be interpreted as referring to the latest edition of that code or standard.CONSTRUCTION5 Materials and Dimensions5.1 Only materials that are acceptable for the particular use shall be employed in a cable. Cables shallbe made and finished with the degr
14、ee of uniformity and grade of workmanship that are practicable in awell-equipped factory.5.2 Each material used in a cable shall be compatible with all of the other materials used in the cable.5.3 These cables shall comply with the construction requirements for cables rated 600 or 2000 volts, asappl
15、icable, in the Standard for Electrical Power and Control Tray Cables with Optional Optical-FiberMembers, UL 1277, except as noted in 5.4 5.6.5.4 The conductors for Flexible Motor Supply Cable shall be copper and in accordance with the Standardfor Flexible Cords and Cables, UL 62, or conductors for f
16、lexing service in the Standard for Machine-ToolWires and Cables, UL 1063. The conductors for Wind Turbine Tray Cable shall be only copper,copper-clad aluminum, or an acceptable aluminum alloy in accordance with the Standard for ElectricalPower and Control Tray Cables with Optional Optical-Fiber Memb
17、ers, UL 1277.5.5 The thickness of insulation of Flexible Motor Supply Cable rated 2000 volts shall be the same as2000-volt rated Type RHW in accordance with the Standard for Thermoset-Insulated Wires and Cables,UL 44.5.6 Wind Turbine Tray cable is a jacketed assembly of two or more 18 AWG to 2000 kc
18、mil conductors.Flexible Motor Supply Cable may be a single 22 AWG to 500 kcmil conductor or a jacketed assembly oftwo or more 22 AWG to 4/0 AWG conductors. Cables rated 2000 volts shall not have conductors smallerthan 14 AWG. Aluminum conductors shall not be smaller than 12 AWG.PERFORMANCE6 General6
19、.1 These cables shall comply with the required performance requirements in the Standard for ElectricalPower and Control Tray Cables with Optional Optical-Fiber Members, UL 1277, except as noted in 6.2 6.3.6.2 The dielectric withstand and spark tests voltages shall be in accordance with the requireme
20、nts forwires rated 1000/2000 volts in the Standard for Thermoset-Insulated Wires and Cables, UL 44.6.3 The insulated conductors rated 1000 volts shall meet all performance requirements for conductorsrated 90 200C, as applicable, and 600 volts. The conductors shall not be surface printed with any typ
21、eletter designation. The insulated conductors rated 2000 volts shall meet all performance requirements forconductors rated 90C and 2000 volts. The conductors shall not be surface printed with any type letterdesignation.AUGUST 16, 2010 SUBJECT 2277 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER
22、REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULMARKINGS7 Information on or in the Cable7.1 The information required on the cable shall be the same as in Section 29 of the Standard for ElectricalPower and Control Tray Cables with Optional Optical-Fiber Members, UL 1277, including the indicatio
23、n ofall optional ratings with the following exceptions:a) “Wind Turbine Tray Cable” or WTTC and/or “Flexible Motor Supply Cable” or “Flexible VFDServo Cable” as applicable, in place of “Type TC”.b) “1000 volts” or “1000 V”, or “2000 volts” or “2000 V”, as applicable, in place of “600 volts.c) Dry an
24、d wet temperature rating(s) as applicable.d) No NEC-type letter marking is to appear on the conductors or the cable.e) “Direct Burial” is not permitted on Wind Turbine Tray Cable.f) “ER” is not permitted on Wind Turbine Tray Cable or Flexible Motor Supply Cable.8 Information on the Tag, Reel, or Car
25、ton8.1 The information required on the tag, reel, or carton shall be the same as in Section 30 of the Standardfor Electrical Power and Control Tray Cables with Optional Optical-Fiber Members, UL 1277, with theexceptions shown in 7.1 and the following statement(s):a) Wind Turbine Cable “Wind Turbine
26、Tray Cable for installation within a wind turbinegenerator in accordance with Article 336 and other applicable parts of the National ElectricalCode.”b) Flexible Motor Supply Cable “Flexible Motor Supply Cable” or “Flexible VFD Servo Cable”intended for use with variable frequency drives subjected to non-linear power distortions.”AUGUST 16, 2010SUBJECT 22776
