UPS for Swiss state railway

October 18th, 2013, Published in Articles: EngineerIT

In a recent, typical implementation for the Swiss state railway, ABB used standard modular UPS solution equipped with two module slots, one compatible with a 16,67 Hz infeed and one with a 50 Hz infeed. The batteries, able to operate autonomously for more than 30 minutes, and the isolating transformer were integrated into the UPS cabinets, saving cost and space. The batteries can be configured as one contiguous unit or as two separate units, one for each module. During normal operation, the load is split evenly between the two supply networks. Should the power supply of one of the modules move out of the tolerance zone, the battery for the appropriate module will activate. If one module is defective, the other module will take on 100% of the load. If the power to both infeeds should fail, the modules would switch to battery operation. This particular project was delivered as an integrated total solution. It included all aspects of consulting and planning, construction and testing of prototypes, logistics, service and installation at over 300 locations and supervision of commissioning.

Contact Nicoline Venter, ABB, Tel 010 202-5990,

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