Control system for office building complex in Switzerland

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Back Up Power Retrofit for Multiple Incoming Main Feeders

The Federal Office for Building and Logistics runs an areal in which electrical power is supplied to the Federal Office for Health and Federal Office for Food Safety. The buildings contain work spaces for administrative and laboratory tasks. Avesco has been asked to retrofit the existing electrical power infrastructure.

Avesco AG represents Caterpillar for Switzerland and Liechtenstein. The Business Unit Electrical Systems of Avesco is Center of Competence for Emergency Back Up Power, UPS Systems, CHP Systems (swiss made), electrical power generation systems, industrial engines including service and customizations.

The application: Utility power is supplied to 6 Buildings by individual MV transformers, all buildings are connected together by an LV busbar, which are back up’d by two Volvo-Penta 250kVA generator sets.

The benefit: With the retrofit of the control system, the operator is now capable to detect and isolated fault conditions on each incoming feeder individually without affecting power supply of the other operational feeders. Another improvement for the building owners is that if there is a power failure then there is only one break in the power. When the mains come back on, the sets will synchronize with the mains and transfer the load back smoothly so that there are no transients. Group Breakers and Mains Breakers can now also be controlled individually in auto and manual mode.

The level of complexity in this project have made ComAp the right choice, due to lower engineering efforts and set up time compared to an PLC system. 

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