Further development of Prysmian 400 kV cable system with AlMil conductor

Prysmian Netherlands has reached a new milestone in the field of high-voltage cables. Our 400 kV cable system with 4000 mm2 AlMil conductor is now qualified according to the strict requirements of IEC62067:2022.

Tests on the lifeline system, including the compatible fittings such as the Click-Fit connection sleeve type CFJX-420 and outer end closure type OTC-420-X, have been successfully carried out. The cable system has successfully withstood all the challenges thanks to the efforts of several departments: Operations (design and production of the cable), NetWorkComponents (design and production of the equipment), Project and Service (assembly of the test rig) and High Voltage laboratory (type approval). The 4000 mm2 AlMil conductor is equivalent to the 2500 mm2 CuMil enamelled conductor in terms of load capacity and is an attractive alternative for customers from a financial point of view.

Trusted Advantages of Aluminum

Prysmian Netherlands has been developing aluminium (solid, beaten or Milliken) conductors for a long time. The advantages of these conductors are:

- lower cable weight,

- lower investment costs due to optimal price/meter ratio,

- lower installation costs, because more manageable due to lower weight,

- more compact cable design possible (with solid conductor type),

- no water ingress into the conductor (with solid conductor type).

Application of aluminium in the Netherlands 
In the Netherlands, aluminium has been used in high-voltage cable conductors for more than 40 years and we see an explicit trend towards increasingly larger conductors. Other countries are also increasingly using large aluminum conductors instead of copper because of the many advantages that aluminum can offer.

Follow-up test
Prysmian Netherlands will perform a second type test of the 400 kV 4000 mm2 AlMil cable at its High Voltage laboratory in Milan. This test also includes the trimmings designed and manufactured by NetWorkComponents of Livorno. This type test is expected to be completed in April 2023.