Slip tests on high-voltage cables in cable clamps

To ensure the long-term operational safety of wind turbines, cable clamps must meet high requirements. Especially when securing heavy power cables—from the generator to the base of the tower—it is crucial that the cables remain securely fastened even under changing climatic conditions.

Test task

Slip tests are used to examine the holding force of cable clamps. The aim is to prove that the clamps perform their function reliably over long periods of time and under extreme temperature changes. This prevents risks such as cable movement or material damage, which in the worst case can lead to nacelle fires.

Test setup

A widened universal testing machine inspekt table 10 kN from Hegewald & Peschke is used for this application. It is equipped with a T-groove plate for flexible specimen clamping and is supplemented by a temperature chamber that enables tests to be carried out in a wide temperature range from –80 °C to +260 °C.

Benefits

The test results of the slip test provide reliable data on the holding force of cable clamps and their temperature resistance.  This allows safe designs to be made that meet the increasing safety requirements in the wind energy industry.

Further information on the test application is available on request.