Heat shrink sleeve for medium-thickness medium-voltage bus bars “STMT24MS Series”
- Material: cross-linked polyolefin
- Field of application: insulation for medium voltage bus bars, optimization of electrical panel interior spaces
- Operating temperature – 40°C to +105°C
- Shrinkage ratio > 2 to 1
- Excellent flexibility
- Standard color Brick red
- Shrinkage temperature 125°C
- Longitudinal variation +5 / -10%
- Tensile strength ≥ 12Mpa according to ASTM D 2671
- Elongation at break ≥ 400% according to ASTM D 2671
- Density 0.95-1.05 according to ASTM D 2671
- Water absorption ≤ 0.2% according to ASTM D 570
- Low temperature flexibility: no cracks according to ASTM D 2671
- Thermal shock (4 hours at 200°C): no leakage, no flow, no split according to ASTM D 2671
- Halogen free: CL: 900ppm max + Br: 900ppm max, according to IEC 61249-2-21
- Volume resistivity ≥ 1012 W.cm according to ASTM D 2671
- Dielectric strength ≥ 16KV / mm according to ASTM D 2671
- Color solidity to light: Comparison between exposed and unexposed/ Parts of the color do not change according to IEC 60684-3
- Copper corrosion (158°C/168 hours): passed according to IEC 60684-3 standards
Heat shrink indication
- When shrinking the heat-shrink sleeve, use equipment made for this specific operation such as, for example, guns or hot air tunnels.
- Shrink the sleeve starting at one end, the most critical part, and then proceed slowly to the opposite end. This method avoids the formation of air bubbles between the inner wall of the heat shrink sleeve and the object it covers.
- In the event that the object to be covered is made of metal or a good heat conductor, it is advisable to preheat the object to avoid “cold areas”, so as to allow a perfect and soft adaptation of the heat-shrinking sleeve.
- In order to avoid overheating of the heat shrink sleeve, ensure there is regular heat distribution. Excessive overheating of the material during the shrinking process can cause bubbles, discoloration and in some cases even breakage of the heat-shrinking sleeve.
