Designed to resist flames and particularly when they are generated by an HV cable breakdown or a peripheral fire in a technical room such as a gallery of HV cables, the shields have obtained the best possible classification in terms of reaction to fire according to the EN ISO 13501-6 Euroclass, with Aca (noncombustible), s1 (no smoke generation), d0 (no generation of flaming droplets); that is to say an M0 grading according to the NF P92-507 French standard.

These shields’ fire performance can entirely be compared to noncombustible materials like steel, rock, glass, concrete, plaster while being much lighter (< 5 kg/m2) and mechanically resistant to breakdowns.

Thanks to the use of 100% mineral materials, that are also non-conducting, and thanks to their geometrical features, the IVV MINERAL PROTECT® anti-common mode shields provide unprecedented mechanical and dielectric protection while allowing cables to dissipate heat energy with natural ventilation.

FOCUS ON THE IVV MINERAL PROTECT® TECHNOLOGY

PATENTED BY COMMET GROUP

Besides its capacity to slow down a high-voltage cable’s combustion, the IVV MINERAL PROTECT® material protects the other phases and other power supply lines in confined spaces such as underground galleries. Developed by COMMET Group, the IVV MINERAL PROTECT® technology is the result of an eco-design approach that respects the environment, as much in manufacturing processes as in the materials used: maximum reduction of the carbon footprint during production; no commonly used hydrocarbon-based resin; total recyclability of the 100% mineral materials used; and no use of products that could lead to the emission of hazardous gases, particularly in closed environments like galleries.

The higher Calorific Value tests conducted in an accredited fire testing laboratory have shown that the IVV MINERAL PROTECT® technology had better fire performance than noncombustible materials used in the construction of buildings.

SOLUTIONS THAT CAN BE ADAPTED TO BOTH GALLERIES AND UNDER HOPPER RISERS

The COMMET GROUP range of IVV MINERAL PROTECT® shields can both be used in the linear parts of underground power supply lines galleries and in more complicated parts at the entrance or exit of galleries (trifurcation).

The variable or fixed size U-shaped cowls are generally more suitable for the ends of galleries or in linear pathways with wall interruptions (ventilation rack, air shaft,...)

In the case of a gallery entrance or exit with crossing cables or trifurcations, retractable cowls are available in COMMET’s catalog.

These can also be recommended for the protection of sensitive or hazard areas such as junction areas in galleries.

AN INTERNAL RESEARCH DEPARTMENT

COMMET GROUP has an in-house engineering department at your disposal for the design of IVV MINERAL PROTECT® shields, according to your needs:

• Inclination in accordance with the wall’s verticality or with mounting brackets, between axes
• Width range, desired load
• Adaptation to existing equipment
• “L” or tablet shaped
• etc.

SNIFFER: PREVENTING THE RISK OF FIRE

Preventing fire from spreading begins with reacting before it even ignites. Based on this observation, COMMET Group has developed a predictive technology that monitors the atmosphere around cables at the under-hopper riser level, under the substations. These areas are the most critical because they are located directly beneath the substations, making them highly exposed to the risk of fire ignition and rapid spread along the riser.