EuroWire July 2016

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July 2016 9
Corporatenews
▲ ▲ Shielded cabins for testing from Highvolt Prüftechnik
Exact and reproducible high-voltage
tests with partial discharge
measurements on plastic-insulated
cables require test systems with very low
background noise level. Furthermore, the
cable industry wishes the high-voltage
tests to be integrated seamlessly into the
production process.
To this end, Highvolt Prüftechnik Dresden
has developed shielded rooms that
provide optimum conditions and high
shielding effectiveness.
Highvolt offers shielded cabins for both
routine and type tests with test voltages
of more than 700kV as standard. The
shielding effectiveness is optimised for
a frequency range between 30kHz and
1MHz. This corresponds to the measuring
range of broadband partial discharge
measuring devices in accordance with
the IEC standard. Where necessary,
the shielded rooms are designed and
manufactured in customised dimensions
or adapted to existing installations.
The walls and main steel construction of
the shielded rooms are preassembled by
Highvolt such that they can be installed
on the customer’s premises both quickly
and with minimum outlay.
Drilling work that could otherwise
damage the zinc anti-corrosion coating
is not necessary. The results include
good shielding properties over the
whole service life and a background
noise level less than 1 picocoulomb.
In addition, the measuring room is
maintenance-free.
To be able to achieve a high throughput
of test objects, the shielded rooms are
fitted with sectional doors that can be
opened and closed quickly thanks to a
motor drive.
The shielded rooms, including the doors,
are suitable for the use of air cushions,
and the cables to be tested can thus be
transported quickly and easily. Transport
by way of fork lifts or rail vehicles, or the
installation of turntable facilities, are
further variants for access.
Multi-stage construction of the floor
ensures reliable separation between the
earthing of the building and the earthing
of the test bay, while at the same time
providing a high mechanical load-bearing
capacity.
Highvolt Prüftechnik Dresden GmbH –
Germany
Website:
Maximum reliability
and efficiency