Why non magnetic material for cable armour
Why non magnetic material for cable armour
(OP)
Our specs say the cable armour shall be of a non-magnetic material. A supplier has proposed using galvanized steel. My company has asked the supplier to replace the galvanized steel with Alumınıum. Sınce the supplier ıs sourcing the 1x630sqmm 33kV cables from an experienced manufacturer,I believe the use of the proposed galvanized steel is a normal practice.
1) Why should the armour be of a non-magnetic material
2) What is the advantage of Alumınium over steel?
1) Why should the armour be of a non-magnetic material
2) What is the advantage of Alumınium over steel?






RE: Why non magnetic material for cable armour
RE: Why non magnetic material for cable armour
RE: Why non magnetic material for cable armour
RE: Why non magnetic material for cable armour
But I find it hard to believe that a cable manufacturer would even propose such a construction. If it is three-phase, it comes down to cost, weight, durability, etc.
RE: Why non magnetic material for cable armour
If you are using single phase cable, then the cable glands and the gland plate shall be of non-ferrous material (usually brass or aluminium), to cancel the magnetic field that will induce currents which will produce heat, and so on...