va tech hydro in india - ANDRITZ Vertical volute pumps

MANDRAKA
In November 2003, VA TECH
HYDRO in France was entrusted
with the rehabilitation of the
hydroelectric power plant in-
Mandraka, Madagascar. Restart
is planned for November 2004.
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KEY PROJECTS
The client is the public company
JIRO SY RANO MALAGASY (JIRAMA).
The project has been developed
with European financing (BEI).
The project is situated 70 km from
Antananarivo, on the road linking
the capital with the harbour of
Toamasina. The head of Mandraka,
the river by the same name,
uses a first drop of 250 m with 70
million m3 deriving from Mantasoa,
to which a contribution of 55 million
m3 of the Mandraka is added.
Mantasoa is located at the border of
the first step of the Eastern cliff in
the proximity of the watershed.
The power station is currently
equipped with four Vevey Pelton
units installed in 1958 (unit power
6 MW) for a head of 250 m. Each
group is equipped with two runners
on the same turbine shaft, with two
injectors per runner. The rehabilitation
principally includes the supply
of four new Pelton runners, two new
turbine shafts, four new oil tanks
with accumulators, two new speed
governors, the rehabilitation of mechanical
components as well as an
electrical assembly comprising
transformers, switchgear and electrical
equipment with our partner
CEGELEC.
This project is very important for the
island of Madagascar because it
represents on its own 12% of the installed
electrical power alone. This
rehabilitation concerning the four
groups (with different supplies for
each group) should therefore be
done step by step in order to maintain
maximum power generation
during the construction period.
VA TECH HYDRO in France will lead
this project to the end using all
the competences of the VA TECH
HYDRO group to ensure the
quality required under the terms of
contract.
Robert Cartier
Phone +33/4 76 85 95 27
robert.cartier@bouvierhydro.fr
Technical data:
Output: 6.1 MW
Head: 234 m
Speed: 600 rpm
Runner diameter: 1,000 mm