Milestones:Krka – Šibenik Electric Power System

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Title

Krka – Šibenik Electric Power System

Citation

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Street address(es) and GPS coordinates of the Milestone Plaque Sites

43.7350196, 15.8952045, Šibenik, Croatia

Details of the physical location of the plaque

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How the intended plaque site is protected/secured

Both sites are secure and accessible to public

Historical significance of the work

It was the first AC electric power system in Croatia and one of first multiphase AC systems in the world. Two generators (42 Hz, 550 kW each) and the transformers were produced by the Hungarian company Ganz. The transmission line from the power plant to the City of Šibenik was 11.5 kilometres long and the municipal distribution grid 3000/110V included six transforming stations. The system Supplied 340 street lights and some electrified houses in the town. Three years later after the first Jaruga power plant, the construction of the second Jaruga hydro plant began. Two three phase, 50 Hz, 5.5 MW generators were installed. A new transmission system was built and local grid enlarged. The historical and social significance of the proposed milestone were presented at the 2007 History of Electro technology Conference in Newark, NJ.

Features that set this work apart from similar achievements

Ganz & Co had previously built an alternator in Rome Tivoli (A1) - a single-phase generator which remained in operation for a limited time. The Power Plant Jaruga 1 (in the Krka-Šibenik system) held Ganz's first multi-phase generator (A2). Furthermore, the Krka-Šibenik system was unique in many ways. Several Zipernowsky, Bláthy and Déri (who, at the time, all worked for Ganz) inventions were first used in Šibenik: ZBD transformers, Blathy watt-meters, etc. The transmission line was also quite interesting. Built on wooden poles it had 6 wires: 4 power conductors (double two-phase line) and a communication (telephone) line. As the power system was set to operation on the night of 28 August 1895, the telephone line (on the transmission poles) was used for communication between the

Significant references

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Supporting materials

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