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- The innovative alternative to cables
- The busbar trunking system for wind turbines
Husum, September 12, 2017
Meeting place, workbench and shop window of the wind industry for over 25 years
Busbar instead of cables
Whether you are an investor, wind farm operator, wind turbine planning engineer, or tower manufacturer, the LDM system offers you distinct advantages specific to the design – at no extra cost. Such benefits can include improved unit availability and enhanced safety and reliability during installation and operation, for example. The LDM busbar trunking system from the SIVACON 8PS product family is thus the innovative alternative to cables. The LDM system offers reliable and efficient power transmission for currents of up 8,200 A.
The LDM system precisely fulfils the specific needs and requirements of every wind turbine and provides all the necessary components, significantly simplifying system planning. This enables, for example, the rotor and stator runs for double-fed asynchronous generators to be routed within a single housing. A PE conductor can be optionally included in the same routing. What’s more, specialists on Siemens' Wind Power team are there to provide you with expert advice and to support your planning efforts. Hence, you can plan cost-efficiently right from the project start.
Simply join the segments, secure with bolts, and you're done: LDM busbar trunking systems arrive at the project site in pre-assembled segments. Contrary to cables, there's no need for complex cutting to length, stripping, insulating, and screwing into place. All the busbar needs is a support on the tower wall every 3.20 metres. Compare this to cable systems, where spacing must be calculated, with some intervals less than 50 cm.
In addition, busbar elements can be pre-assembled and installed in tower segments that lie horizontally prior to final erection, thereby saving time and money. On site, all that's left to do is secure the connections between the tower segments during final erection using design verified single-bolt connections. The assembly work in all phases of installation is performed using a standard torque wrench. In short: Using the LDM system substantially reduces installation time.
The LDM busbar trunking system transmits power from the nacelle to the tower base safely and reliably. The LDM system meets all requirements of IEC 61439 Parts 1 and 6. This means that the system is subject to priordesign verification, ensures that all technical parameters are sustainably fulfilled, and rules out any overloading of the systems and consequential damage. Any short circuits arising have no impact on the LDM system. Because practically no plastics are used, the fire load is very low, immensely increasing the level of safety compared to cable systems. For wind turbine operators, this translates into reliable wind farm operation – across the entire fleet.
Growing importance is being place on improving the energy efficiency of wind power. Manufacturers and operators of wind turbines are coming under pressure to design their units to be as low-loss as possible. With LDM system, Siemens has developed a system that minimises power losses and significantly improves efficiency.
Over the total service life of a wind turbine, this translates into additional grid feed-in compensation for wind turbine operators. In addition to the quick return on investment, operators using the LDM busbar trunking system demonstrate their sense of responsibility for environmental issues – thanks to the environmentally friendly, halogen-free design, high energy efficiency, and high recycling rate.
|Rated insulation voltage Ui||1000 V AC|
|Rated operational voltage Ue||1000 V AC|
|Degree of protection||IP21 with saline fog and condensation test|
|Rated current InA||800 A to 8200 A|
|Rated peak withstand current Ipk||Up to 255 kA|
|Rated short-time withstand current Icw (1 s)||Up to 116 kA|
|Number of conductors||3 to 10 conductors per trunking unit (2 circuits per trunking unit possible)|
|Fire load||Depending on the application|
|Fire load (per tap-off point)||Separate single-bolt joint block with hook system|
||Galvanised steel (optional coating in RAL colour)|
|Standards||IEC 61439-1/-6, North America: conforming to UL6141|
|Adaptability||To standard LD system|
|Mounting position||Vertical, horizontal|
Downloads, support, services
Tender specifications, catalogues, technical documentation, and of course contact with our Customer Support Center: Here you will find important documents and links for your SIVACON 8PS busbar trunking systems.
Trade shows and regional and international trade fairs and exhibitions: Get to know the SICAVON 8PS busbar trunking systems. Come learn first-hand about this innovative alternative to cables.
The Power Engineering Guide
The Power Engineering Guide is a manual for everyone who is involved in the generation, transmission and distribution of electrical energy – from system planning, to implementation and control. Discover the SIVACON 8PS busbar trunking systems in Sections 3.3.7 and 4.5.5.