Erzbach Run-of-River Power Plant

VERBUND’s Erzbach power plant is a run-of-river power plant on River Erzbach situated in the municipality of Eisenerz in Styria.

Man in the kitchen

1,217 households

supplies the Erzbach power plant

Conscious of the environment

4,137 fewer
tonnes of CO2*

Fish bypass

Construction of a fish bypass

is being planned


Certified in accordance with ISO14001

* Source: ENTSO-E Production 2017

The Erzbach power plant was built between 1980 and 1983. Two horizontally arranged Francis turbines generate an annual average of about 6.4 GWh of electricity.
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Image from the Location

Owner VERBUND Hydro Power GmbH
Operator VERBUND Hydro Power GmbH
Commissioning 1986
Type Run-of-river power plant
Country Austria
Region Styria
Waters Enns, Erzbach
Output 01 MW
Annual output 5,383 MWh
Turbine Francis
Connectivity No fish bypass

Ecology & environmental protection

The construction of a fish bypass is currently being planned at the VERBUND power plant Erzbach.

The entire plant group of the Styrian hydropower plants has been awarded the environmental certificate ISO 14001. The power plants on the rivers Mur and Enns not only fulfil the statutory requirements but also focus on high environmental standards and technical innovations. The goal is the efficient use of hydropower and the balance between economy and ecology. The effectiveness and benefit of the environmental management system are mainly the responsibility of our employees, who undergo constant training and development in this area.

Wherever ecologically valuable and technically feasible, VERBUND has set itself the goal of guaranteeing the continuity of flow for domestic fish and aquatic life at the locations of its hydropower plants. By 2025, VERBUND will invest 280 million euros on the implementation of fish bypasses and other ecological structural measures.


Our latest conservation projects
Turbines and generators: Two Francis turbines with horizontal shaft are each coupled to three-phase synchronous generators. Machine 1 has a nominal output of 800 kW at a nominal flow rate of 2.2 m³/sec. and is connected to a 1,000 kVA generator; machine 2 supplies a nominal output of 600 kW at 1.1 m³/sec. and is coupled to a 650 kVA generator. The head at both machines is 41.2 metres. 

Transformers: The generated energy is raised to 10 kV by means of a 1,600 kVA machine transformer (built in 1984) and fed into the 10 kV grid of STEWEAG. The power plant’s own requirements are met by a 30 kVA isolating transformer.

Weir system: The single weir field across the river is equipped with a pressure segment with weir flap. The segment is raised by pull cylinders arranged at both ends; the weir flap is moved by a centrally arranged push cylinder. A prescribed doping water flow rate of 235 l/sec. must be discharged into the tailrace.