ISOMIL - Mineral Insulated Cables
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Properties and Advantages of Mineral Insulated Cables

At room temperature and up to the more common application temperatures mineral powder insulates so well that the sheath can be considered to be entirely separated from the inner conductor. Consequently, there are no adverse effects if the conductor touches other metal parts of the equipment or is connected to them.

Long Life

The construction of the cable guarantees a long conductor life and thus the function of the conductor because the sheath and the insulating powder protect the conductors (cores) against environmental conditions such as corrosion or scaling.

Easy Installation

The cables are pliable, easy to handle and can be installed easily in a limited space or in locations where access is difficult. No additional insulation is required.

Mechanical Strength

The compact construction with densely packed mineral powder and the robust metal sheath ensure the position of the conductors in the compound and thus the function of the cable even when exposed to mechanical stresses such as bending, twisting or flattening. The cable can also be used in pressure or vacuum equipment.


Since the insulation is attained exclusively from powders on a mineral base the cables are fire-proof and can thus be exposed to considerably higher temperatures than cables with synthetic sheaths (e.g. PVC, teflon or textile fibres etc.).

Rapid Response

The high density of the mineral powder effects rapid transmission of heat between conductor and sheath: This factor makes the cable highly suitable for temperature measurement and control techniques.

Dielectric Strength

Despite its small size the compact construction allows an amazingly high dielectric strength conductor/conductor or conductor/sheath, respectively, which means the cables can be used in power supply systems at 220 V and above.

Radiation Resistance

The correct choice of component ensures radiation resistance making possible the use of these cables in primary circuits as well as in the incore area, i.e. inside the actual reactor core.

Corrosion and Scaling Resistance

The vast array of materials included in our standard programme and the possibility to make materials to specification has put us in a position to supply suitable sheath materials even for unfavourable environmental conditions in a corrosive atmosphere and at high temperatures. Depending on the choice of component the maximum application temperatures are between 500ºC and 1000ºC.

Long Lengths

Long lengths of cable can be obtained due to the initial measurements before drawing and the production method.

Small Cable Diameter

The relatively small diameter (compared with conventional cables) which is a result of the construction has many advantages for both customer and construction engineer.

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