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Wind turbine system and standards

UL has been working with manufacturers for some time to certify wind turbine components. This expanded service will enable manufacturers to apply for system certification which covers electrical and fire safety for the entire turbine.

UL's comprehensive wind turbine service will enable companies to serve the global energy market through a process that is designed to minimize the time and resources they must dedicate to project administration and management.

Category codeUL StandardsIEC Standards
Large WTGSUL Subject 6140, Outline of Investigation for Wind Turbine Generating SystemIEC 61400-1, Design requirements

IEC 61400-2, Design requirements

IEC 61400-12-1, Power performance measurements of electricity producing wind turbines

IEC 61400-13, Measurement of mechanical loads

IEC 61400-14, Declaration of apparent sound power level and tonality values

IEC 61400-21, Measurement and assessment of power quality characteristics of grid connected wind turbines

IEC 61400-24, Lightning protection

IEC 60204-1, Requirements for electric components
Large WT Assemblies
(Structure only)
UL Subject 6140, Outline of Investigation for Wind Turbine Generating System
Small & Micro WTGSUL Subject 6140, Outline of Investigation for Wind Turbine Generating System
WT Safety Related Control System equipmentUL Subject 6140, Outline of Investigation for Wind Turbine Generating System
WT Inverters and ConvertersUL Subject 6141, Outline of Investigation for Wind Turbine Converters and Interconnection Systems Equipment
WTGS ComponentsAppendix A in UL subject 6140

 

ComponentUL Requirement
Wiring
  • Internal Wiring - UL 508
  • Tray cable usage - UL subject 2277, UL 13, UL 1651, UL 83/UL44 in different usage fields
Cable drip loopSubject 6140
Bus bars
  • Subject 6140
  • UL 857
  • IEEE C37.23
Switchgear
  • Comply with the appropriate ANSI standard for the switchgear installed
  • Indoor location, normal service conditions
Transformers
  • If Rating ≤600V, UL 506, UL 5085-1/2/3
  • If Rating >600V, UL 1562
  • Instrument transformer: ANSI/IEEE C57.13
Hub/Spinner
  • Door secured electrical cabinet
  • Enclosures: UL 508, UL 508C
Converter / Inverter
  • UL Subject 6141
  • UL 1741
Lighting protection system
  • For system, NFPA 780
  • For components in system, UL 96
Slip ringsSubject 6140
Gear boxSubject 6140
Hoists & winchesUL 1340
Fire alarmsUL 864, for the purpose of Property protection only
Emergency stopSubject 6140

For more details, please contact us at wind@ul.com.