Liebherr-Transportation Systems offers a wide range of innovative efficient and railway proven solutions to properly provide the required Electrical Power Supply for either single components (as fans and compressors), or integrated systems (as HVAC* units) or even entire cars.

Among other products there is a large assortment of water and air cooled frequency converters in the range from 0,5 … 70 KVA available which can be operated on various incoming voltages in the spectrum from 24 V DC to 1,5 KV AC and which is based on the latest IGBT technology.

Those frequency converters are protected against short circuit and can be used for different output frequencies.

Characteristics and benefits of HVAC units with integrated electrical power supply:

• Modular design provides high flexibility and facilitates wide range of application.
• Enables compact, highly-integrated air-conditioning systems, including tailor-made, cost and energy efficient drives for fans and compressors.
• High efficiency factor when incoming voltage provided from the overhead line.“Plug-&-play” solution,
• Utilises the vehicle’s existing electrical interfaces.
• Can be configured for both roof-mounted and underfloor air-conditioning units.
• Uses intelligent diagnostic signalling and monitoring routines to increase reliability and availability.
• If appropriate the water used to cool the water-cooled modules can be chilled by leading the water circulation through the condenser of the HVAC unit.
• No need for large, heavy refrigeration units, fans and air ducts. Lightweight, compact unit combinations are possible that save weight and space in the vehicle.
• PoAC costs less than standard solutions with separate units once all associated costs for the standard solution are considered.
• Compared with standard solutions, HVAC units with integrated inverter offer enhanced performance in terms of cost, weight and space requirements, facilitating air-conditioning concepts with increased redundancy.

Liebherr Integrated Power Supply represents green technology :

• Variable speed regulation of fans, and compressors provides high efficiency of air conditioning unit in the partial load range and very good thermal comfort in the vehicle.
• Reduced power consumption of HVAC unit.
• Extraordinary energy savings of up to 50% for units featuring compressors with a high speed setting range.
• Less noise in the partial load range.
• Save resources, saves valuable energy and reduces life-cycle costs.

* HVAC : Heating, Ventilation and Air Conditioning Systems