EuroWire July 2016

Corporatenews

▲ ▲ Shielded cabins for testing from Highvolt Prüftechnik

Maximum reliability and efficiency

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 : www.highvolt.de

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

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

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July 2016