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Hitachi Energy technology protects Slovenia’s first pumped storage power plant

Hitachi Energy's compact and fully integrated GCB for clean energy production

Hitachi Energy supplied the complete HECPS-3S generator circuit-breaker system to Seng’s Avče, the first pumped storage power plant of its kind in Slovenia.

With almost 26,000 kilometers of rivers and streams, hydro power is key to meet the country’s energy demand. Avče is the primary source of clean energy for Slovenia and helps to balance the load and supply within the power system to provide cost-effective energy.

The fully integrated GCB type HECPS-3S is installed in the power plant to protect key equipment and increase overall plant safety and reliability. Hitachi Energy’s HECPS-3S is a unique solution for pumped storage power plants that integrates key functionalities in one compact system. Its compact design made it easy to transport, handle and install.

Equipped with the innovative GMS600 monitoring system to enable preventive and predictive maintenance. Data is accessible at anytime from anywhere via the Internet to enable an effective lifetime management.

Main data
Year of installation 2015 - 2019
System type HECPS-3S
Maximum operating voltage 17.3 kV
Nominal operating current 7,500 A
Rated frequency 50 Hz
Short-circuit current
100 kA