Eurotel Praha, spol. s.r.o. (Praha, Czech Republic), the largest provider of wireless voice and data services in the Czech Republic, has selected Active Power's CleanSource technology, a flywheel-based Uninterruptible Power Supply (UPS) System marketed through Caterpillar as Cat UPS. Eurotel will use Cat UPS to improve the reliability of its technology with the objective of meeting its customers' needs and ensuring uninterrupted operation of all its systems.

When looking for an optimum power supply solution, Eurotel turned to a progressive concept from Phoenix-Zeppelin (Modletice, Czech Republic), labeled NZ². The concept is based on the integrated operation of both a Caterpillar diesel generator and the flywheel UPS, supplemented with an automated control and monitoring system and corresponding power elements, all packaged in a durable outdoor container.

During the pilot operation of the first system, Eurotel conducted a number of stringent tests. The test results were so successful that Eurotel permanently installed one 250-kVA NZ² power center at one of its sites in Prague to further improve the power supply system reliability.

Eurotel confirmed its decision by signing a general contract with Phoenix-Zeppelin for the supply of up to 10 NZ² power centers.

“Our battery-free flywheel based UPS is suitable for installations in a highly demanding environment such as the technological operations of the largest mobile operator in the Czech Republic. We believe this installation demonstrates that a comprehensive concept of the entire power center from a single vendor provides a technically balanced solution and facilitates better conditions for the maintenance and servicing of the whole system,” says Zdenek Rešátko, Phoenix-Zeppelin's director of power systems