Installations in operation:
more than 40 hydroelectric facilities

our core activities

innovative solutions

Central workshops:
a special know-how

various services

Company Film:
the mountains give us their water...

Les Ateliers
un savoir faire


DiamHEX: high-added value diagnosis by the operator

Our engineers carry out the electrical diagnostics of our rotating machinery. Named diamHEX, these tests makes it possible to determine the condition of the winding and its insulation.

The results provide valuable information about the current condition of the examined machine, for example to justify an overhaul or future replacement.

With more than 50 diagnoses carried out to the full satisfaction of our clients for whom we operate and maintain their facilities, this expertise now extends to clients for whom we do not.

The success of this service is due to our independent expert approach. Thus, as skilled hydropower plant engineers, our diagnosticians are very sensitive to the operating constraints of our clients. Their goal is to maintain the unit in service as long as possible, thus requiring pragmatic solutions.

Furthermore, as plant operators, we must deal with all types of failures in a hydro generating facility. Our service is not limited to the analysis of the stator or rotor of a machine. When potential external failure causes are identified, unlike the limited approach where these elements are simply excluded from the initial scope, we investigate further. Our competencies therefore allow us to advise clients effectively and find solutions.

Latest innovation: we are now equipped with a UV camera. This enables us to locate partial discharges with pinpoint accuracy, making it possible to detect problematic areas in the enwinding. In this way, if specific discharge sources are identified, we can deploy a winder to correct the situation, before it degrades the insulation.

See the film


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HYDRO Exploitation SA
Rue des Creusets 41
CP 750 - CH-1951 Sion
T +41 (0) 27 328 44 11
F +41 (0) 27 328 44 12
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