1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULMay 1, 20091SUBJECT 6140OUTLINE OF INVESTIGATIONFORWIND TURBINE GENERATING SYSTEMSIssue No. 1May 1, 2009Summary of TopicsThis is the first issue of the Subject 6140 Outline of Investigation for W
2、indTurbine Generating Systems.The UL Foreword is no longer located within the UL Standard. For informationconcerning the use and application of the requirements contained in thisStandard, the current version of the UL Foreword is located onULStandardsInfoNet at: http:/ 2009 UNDERWRITERS LABORATORIES
3、 INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULMAY 1, 2009SUBJECT 61402No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .42 General 4
4、2.1 Components .42.2 Units of Measurement .52.3 Undated References 53 Special Components and Subassemblies of WTGS .53.1 Wiring .53.2 Cable drip loop 63.3 Bus bars 63.4 Switchgear 83.5 Transformers .83.6 Hub .93.7 Converter/Inverter 93.8 Lightning protection systems .93.9 Slip rings 93.10 Gearboxes
5、103.11 Hoists and winches .103.12 Fire alarms 113.13 Emergency stop 11CONSTRUCTIONWTGS AND SUBASSEMBLY4 General .125 Disconnection Device 126 Spacings 137 Energy Storage Units .147.1 General .147.2 Battery mounting 148 Working Space 159 Safety Related Controls System (SRCS) 169.1 General 169.2 Prote
6、ction functions 169.3 Abnormal conditions for safety related controls system .17APPENDIX AStandards for ComponentsA1MAY 1, 2009 SUBJECT 6140 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 This Outline of Investigation
7、covers Wind Turbine Generating Systems (WTGS) and electricalsubassemblies. These units are intended for use in stand-alone (not grid-connected) or utility interactiveapplications. Utility-interactive WTGS are operated in parallel with an electric power system (EPS) tosupply power to common loads.1.2
8、 The WTGS power, control and protection systems are evaluated only to the extent that they functionwithin the manufacturers specified limits and response times. These control and protection functions areevaluated with respect to risk of electric shock and fire. It is intended that the electrical sub
9、assemblies thataddress power transfer control and protection functions evaluated per this document are to be coordinatedwith the mechanical and structural evaluation of the WTGS in accordance with the IEC 61400 seriesdocuments or Germanischer Lloyd WindEnergie GMBH: Guideline for the Certification o
10、f Wind Turbinesdocuments.1.3 This Outline of Investigation does not cover:a) WTGS intended for off-shore installation.b) Mechanical or structural integrity of the WTGS or subassemblies.c) Coordination of electrical and mechanical systems to maintain the WTGS within its safemechanical and structural
11、limits.d) Mechanical loading of ladders, scaffolding, personnel tie offs, or other personnel loadbearing functional parts.1.4 The products, systems, and subassemblies covered by these requirements are intended to beinstalled in accordance with the National Electrical Code, ANSI/NFPA 70.2 General2.1
12、Components2.1.1 Except as indicated in 2.1.2, a component of a product covered by this Outline shall comply withthe requirements for that component. See Appendix A for a list of standards covering components usedin the products covered by this Outline. See also Section 3, Special Components and Suba
13、ssemblies ofWTGS.2.1.2 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, orb) Is superseded by a requirement in this Outline.MAY 1, 2009SUBJECT 61404UL
14、 COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL2.1.3 A component shall be used in accordance with its rating established for the intended conditions ofuse.2.1.4 Specific components are incomplete in construction features or restricted in perfor
15、mancecapabilities. Such components are intended for use only under limited conditions, such as certaintemperatures not exceeding specified limits, and shall be used only under those specific conditions.2.1.5 Components and subassemblies of the overall WTGS shall be evaluated and found suitable forop
16、eration over the normal range of electrical and environmental conditions as specified by the WTGSmanufacturer.2.2 Units of Measurement2.2.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory orapproximate information.2.3 Undated References2.3.1 Any undated r
17、eference 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 Special Components and Subassemblies of WTGS3.1 Wiring3.1.1 Internal wiring shall comply with the Standard for Industrial Co
18、ntrol Equipment, UL 508, in additionto the requirements in this section.3.1.2 Wiring that is subject to movement, flexing, or twisting during operation of the wind turbine shall beinvestigated for suitability in the conditions of use and rated life or cycle time.3.1.3 All wiring within a WTGS that i
19、s large enough for service personnel to enter the structure shall berated for tray cable usage. The following meet the intent of the requirement:a) Multiconductor cable complying with the Outline of Investigation for Flexible Motor SupplyCable and Wind Turbine Tray Cable, Subject 2277, and marked fo
20、r Wind Turbine usage.b) Power-limited circuit cabling complying with the Standard for Power-Limited Circuit Cables,UL 13, suitable for Tray Cable usage (Types CMG, CM, CL2, CL3, PLTC, CMR, CL2R, CL3R,CMP, CL2P, CL3P).c) Optical fiber circuits complying with the Standard for Optical Fiber Cable, UL 1
21、651.d) Power cabling complying with the Standard for Thermoplastic-Insulated Wires and Cables,UL 83, or the Standard for Thermoset-Insulated Wires and Cables, UL 44, and additionallymarked for Cable Tray usage (“CT”, “For Cable Tray Use”, “For CT Use”, or “For Use in CableTrays”) or marked FT4.Excep
22、tion: Wiring within a component need only meet the requirements for the component.Note: For Canada, an FT4 rating is required per the Canadian Electrical Code.MAY 1, 2009 SUBJECT 6140 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL3.1.4 Wiri
23、ng within a rotating hub shall be additionally protected from mechanical damage. Suchprotection may be provided by enclosures or conduit complying with the Standard for Metallic OutletBoxes, UL 514A, and/or the Standard for Conduit, Tubing, and Cable Fittings, UL 514B, mechanicalshielding, or the eq
24、uivalent.3.1.5 Wiring subjected to exposure to water or oil during normal or abnormal conditions such as a gasketor seal leak shall be suitably rated for the condition.3.1.6 Wiring subjected to UV exposure shall be rated for exposure to sunlight.3.2 Cable drip loop3.2.1 If operation of the wind turb
25、ine may result in twisting of flexible cables, such as the connectingcables between rotating parts (nacelle) and parts of the fixed structure (tower or foundation), theoperational conditions of use shall not cause damage to the conductors or their insulation. The evaluationshall address service life
26、, electrical and environmental operating conditions of the subassembly.3.2.2 Controls that prevent damage to conductors or their insulation including rotational limits shall beconsidered part of the Safety Related Controls System evaluation of this document. The Control shall bedesigned such that re
27、setting to the neutral position is possible. See Section 9, Safety Related ControlsSystem (SRCS).3.3 Bus bars3.3.1 Sections of bus shall be suitably attached to the tower or to components of the tower intended tosupport the bus. The compliance of the attachment method shall be determined by subjecti
28、ng arepresentative bus to Impact, Static Load, and Flexing tests.3.3.2 Bus shall be guarded or insulated to prevent unintentional contact in accordance with the following:a) Bus shall be metal enclosed at each work platform for a minimum of 8 feet above eachplatform.b) In areas other than work platf
29、orms, bus operating at 2500 V or more shall be metalenclosed.c) In areas other than work platforms, bus operating at less than 2500 V shall be metalenclosed, enclosed in a non-metallic enclosure complying with the Standard for PolymericMaterials Use in Electrical Equipment Evaluations, UL 746C, or t
30、he conductors shall beprotected by insulation and jacket that would be required of comparable tray cables specified bythe Outline for Flexible Motor Supply Cable and Wind Turbine Tray Cable, Subject 2277, theStandard for Electrical Power and Control Tray Cables with Optional Optical-Fiber Members, U
31、L1277, and the Standard for Thermoplastic-Insulated Wires and Cables, UL 83.3.3.3 Where cables are connected to bus assemblies, suitable wiring terminals shall be provided. Wherethe anticipated movement of the tower assembly causes movement of the cable or bus assembly, strainrelief shall be provide
32、d to prevent movement of the connection.MAY 1, 2009SUBJECT 61406UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL3.3.4 Performance requirements shall be based on the Standard for Busways, UL 857, for bus rated 600V or less and on the Standard f
33、or Metal Enclosed Bus, IEEE C37.23, for bus rated more than 600 V.Performance testing shall include electrical and mechanical tests. See 3.3.5 and 3.3.6.3.3.5 The following electrical tests shall be conducted:a) Continuous Current (Heating),b) Dielectric Withstand (Applied Potential) for all voltage
34、 ratings,c) Impulse Withstand for bus rated more than 2.2kV,d) Short Circuit Withstand for bus assemblies rated up to 600V, ande) Momentary and Short-Time tests for bus assemblies rated greater than 600V.3.3.6 The mechanical tests specified in (a), (b), and (c) shall be conducted. The parameters for
35、 vibrationand flexing tests are to be determined based on the amount of flexing transmitted to the bus assemblythrough movement of the wind turbine and tower under anticipated extreme conditions determined basedupon the WTGS calculations in Wind turbines Part 1: Design requirements, IEC 61400-1.a) I
36、mpact Tests Ambient and cold impacts shall be conducted on the enclosure, housing orinsulator as specified in the Standard for Busways, UL 857, or the Standard for Metal EnclosedBus, IEEE C37.23, the Standard for Polymeric Materials Use in Electrical EquipmentEvaluations, UL 746C, or the Standard fo
37、r Thermoplastic-Insulated Wires and Cables, UL 83,as applicable.b) Static Load Test The bus bar and the lower structural support shall be subjected to a forceof 4 times the normal load of the fully assembled longest bus bar in the system. This test forceshall include any additional weight of connect
38、ion cables. Bus bar sidewall supports, guides andassociated bracketry are to be subjected to a force of 4 times the maximum normal operatingforce encountered during tower movement. As a result of the loading test, there shall not bepermanent deformation, breakage, dislocation, cracking or other dama
39、ge to the system ormounting structure.c) Flexing Test The bus bar shall be subjected to a flexing test to simulate expecteddeflection and forces on bus bars and support structure over the wind turbine expected life in itsintended installation location. The site class as designated by Section 6 of Wi
40、nd turbines Part1: Design requirements, IEC 61400-1 shall be used to define and quantify this expectedmechanical operating environment over time. The test excursion movements required for thistest shall be 1.5 times the calculated movement of the bus bar system. Prior to the test, the busbar assembl
41、y is to be subjected to loading on the top of the bus bar section to simulate theloading of the upper sections of bus bar, insulator and cables. Forces are to be cyclicallyapplied to the bus bar to represent movement of the actual tower. As a result of the loadingtest, there shall not be permanent d
42、eformation, breakage, dislocation, cracking or other damageto the system or mounting structure.Exception: Mechanical means to mitigate bus bar stress and force may preclude the need to perform amechanical flexing test.MAY 1, 2009 SUBJECT 6140 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRO
43、DUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL3.3.7 The dielectric tests shall be performed following each of the above tests. Following the above tests,the bus bar insulators shall prevent accessibility to electrically live parts as determined by application ofthe accessibility probe.3.3.8 The l
44、eakage current test shall be performed following the above tests for polymeric enclosed busbars.3.4 Switchgear3.4.1 Switchgear installed within the tower assembly shall comply with the appropriate ANSI standard forthe type of switchgear installed.3.4.2 Switchgear installed within the tower assembly
45、is considered to be installed in an indoor location,but may be subjected to dripping water. Enclosures for switchgear shall not have openings on the topsurface, unless such openings are protected by a drip hood which prevents entrance of falling water.3.4.3 The service conditions within the tower as
46、sembly shall be considered with respect to the normalservice conditions for the type of switchgear installed within the tower. Where the anticipated serviceconditions within the tower are more severe than the normal service conditions for the switchgear, theseconditions shall be mitigated, or additi
47、onal investigation of the switchgear may be required.Note: As an example, the normal service conditions for Metal-Clad Switchgear are defined in ANSI/IEEEC37.20.2 to include an ambient air temperature of 30 to 40 C, and an altitude of 1000 m or less. If theanticipated temperature within the tower as
48、sembly is less than 30 C, supplemental heating may berequired.3.5 Transformers3.5.1 Power transformers rated 600 V ac or less shall comply with the requirements in the Standard forSpecialty Transformers, UL 506, the Standard for Dry-Type General Purpose and Power Transformers,UL 1561, the Standard f
49、or Low Voltage Transformers Part 1: General Requirements, UL 5085-1, theStandard for Low Voltage Transformers Part 2: General Purpose Transformers, UL 5085-2, or theStandard for Low Voltage Transformers Part 3: Class 2 and Class 3 Transformers, UL 5085-3.3.5.2 Power transformers rated greater than 600 Vac shall comply with the requirements in the Standardfor Transformers, Distribution, Dry-Type Over 600 Volts, UL 1562.3.5.3 Overcurrent protection for power transformers shall comply with Article 240 Part IX,
