a) Properties of Polyvinylchlorur (PVC) based materials:
PVC (Polyvinylchlorur) is a material widely used in cable isolation and sheathing. It is being preferred since it is cheap and easily applicable. It has flame-retarding property in its nature. Although flame-retarding property can be developed with additive agents, it emits intensive smoke and corrosive gases during fire. As it might be expected, intensive smoke will make difficult the evacuation of people and operations of extinguishing and rescue teams.
HCl, CO2 and CO gases, which come into view as a result of burning of the PVC based materials, are the primary death causes of people. Hydrochloric acid, which emanates from integration of HCl gas with water, rapidly corrodes metal construction elements and electronic devices. It has been allowed for in the areas, which are specified to be implemented by our technical team within the context of the project.
b) Properties of Polyethylene (PE) materials:
Polyethylene material is a material, chemically without halogene. When burned, it doesn’t emit poisonous and corrosive gases, but since it doesn’t have flame-retarding property, and since it is easily inflamed, it contributes to spreading of fire. Its smoke intensity is above the limit values.
Because of these reasons, cables made of polyethylene material should in no way be used in the construction.
c) Properties of HFFR (LSOH) materials:
It is flame-ratardant, in case the fire source is drawn away, and in case fire is extinguished, inflamed cables automatically die down.
In case of fire, they don’t emit corrosive and poisonous gases. This property is primarily important for human life, and they don’t cause corrosion in electrical and electronic devices.
It has low smoke intensity. Low smoke intensity is important from the viewpoint of evacuation of people from the fire location and fire extinguishing operations.
d) Properties of fire resistant materials:
Fire resistant materials are especially used in core isolation of the cable. The reason of this is no doubt the fact that cable cores bear the electric current.
Besides, in order to increase the fire resistance of the cores, protective bandages and sheaths are also being used.
Below materials are being mostly used today.
In cable isolation;
1) Polymer compound in cross-linked form, is a silicone based isolation material. It successively passes the standard burning tests.
2) Mica tape + XLPE or cross-linked HFFR compound is rather being implemented in power cables.
Glassfiber tape or mica tape is being used as a flame barrier on the cores in the cable.
Areas of utilization of Ervıtal fire resistant energy cables:
Advantages
Areas of utilization of Coaxial cables:
Areas of utilization of signal control cables:
Areas of utilization of Erflex command cables:
Areas of utilization of data communication cables:
Areas of utilization of composite cables:
Areas of utilization of Silicone cables:
» In high temperature machines and environments
» In low temperature environments
» In iron and steel industry
» In glass industry
» In burners
» In heating and illumination systems
» In white appliances sector
Areas of Utilization:
» In chemistry industry
» In power plants
» In petro-chemicals industry
» In inner and outer environments; in dry, wet, and moist environments
Areas of utilization of building automation cables:
EIB-H(St)H:
IEC 60332-1-2/EN 60332-1-2
It is the test by which flame retarding of the cable is tested. Flame is applied on the cable with an angle of 45 degrees. When there’s not a carbonization from upper end of the cable to at least 50 mm down, the cable is deemed to have passed the test.
Cable’s outer diameter (mm) | Flame application time (second) |
D<25 |
60 |
25 | 120 |
50 | 240 |
D>75 |
480 |
Temperature :950 ºC
Time :30 minutes
Ph : shouldn’t be less than 4,3
Conductivity : shouldn’t exceed 10 µS/mm
It is a test, which ensures measuring of acid, gas and conductivity values propagated during burning. Conductivity value of 1 liter of gas solution constituted as a result of burning should be at least 10 µS/mm, and its pH ratio should be over 4,3. When these conditions are provided, the cable is deemed to have passed the test.
Circuit Integrity Test under Fire Conditions
EC 60331-21 / IEC 60331-23
It is a test, which is horizontally laid, and current transmission property under a fire at 750 °C is tested. With the FE (FE 180 etc.) value specified on the cable, minimum period that the cable resists to fire is given. .
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