UL 6141 2016 pdf download – Wind Turbines Permitting Entry of Personnel.
3.1 5 SAFETY RELATED CONTROLS SYSTEM (SRCS) – Assembly of equipment that includes the critical controls and protection functions that maintain the wind turbine within its mechanical and structural design limitations. This includes the evaluation of electrical control and protection functions, limits, operation, and response times during normal, abnormal, and failure conditions. The SRCS may include electromechanical components. 3.1 6 SWITCHGEAR – The combination of switching and interrupting devices that are used with associated control, instruments, metering, protective, and regulating accessories. Switchgear also includes associated interconnections and other electrical accessories, and supporting structures used primarily for the generation, transmission, distribution, and conversion of electric power. 3.1 7 SWITCHGEAR ASSEMBLY – Assembled indoor or outdoor equipment provided with a supporting structure, one or more enclosures, conductors, electrical interconnections and other accessories that includes switching, interrupting, control, instrumentation, metering, protective, and regulating devices. 3.1 8 TURBINE PROTECTION SYSTEM – System intended primarily to provide protection for a wind turbine structure in the event of the following conditions: short circuits, excessive vibration, rotor or generator overspeed, extreme temperature, or extreme wind. 3.1 9 UP TOWER – The space in and around a wind turbine location that is at or above the top of the tower such as in the nacelle and hub. 3.20 WIND TURBINE (WT) – A device or system of subassemblies that convert wind energy to electric power and typically consists of an overall structure including; tower, nacelle, hub and blades as well as the associated internal equipment. 3.21 WIND TURBINE OUTPUT CIRCUIT – The circuit conductors or equipment connected to the turbine output terminals or conductors where the turbine is intended to be connected to the electric power system (EPS).
4 Special Components and Subassemblies of Wind Turbines 4.1 General 4.1 .1 For the purpose of this standard, the medium voltage requirements are to be applied to circuits that operate at greater than 1 000Vac / 1 500 Vdc nominal. 4.1 .2 WT equipment and subassemblies, other than those noted in this section and 2.1 , Components, shall comply with (at minimum) one of the following standards: a) The Standard for Industrial Control Panels, UL 508A; b) The Standard for Adjustable Speed Electrical Power Drive Systems – Part 5-1 : Safety Requirements – Electrical, Thermal and Energy, UL61 800-5-1 , or c) UL 60947 Low-Voltage Switchgear and Controlgear – Part 1 : General Rules along with any of the following UL 60947 part 2 standards: 1 ) UL 60947-4-1 , Low-Voltage Switchgear and Controlgear – Part 4-1 : Contactors and Motor-Starters – Electromechanical Contactors and Motor-Starters;