Gala Barrier Board (GBBS) sheets are Non-shrinkable sheets designed to secure and insulate the underside of structures where there are reduced clearance. Also GBBS sheet acts as inter-phase barrier for switchgear applications. It can be easily fabricated into a shape.
The use of GBBS sheets allows switchgear cabinets to be protected against inter-phase flash-overs caused by contaminants, moisture and animals.
These extremely durable sheets are damage resistant to mechanical impact are general wear and tear usage. Machining properties allow sheets to be cut and drilled for mounting without the need of special equipments. The GBBS sheets withstands power-arcs without changing its shape. The high temperature resistant material cab be wiped clean after power-arc events resulting in no visible effects of surface damages.
Technical Specification* | ||
---|---|---|
PROPERTIES | VALUE | STANDARD |
Tensile Strength | 10 N/mm2 (Mpa) (min.) | ASTM D638 |
Ultimate Elongation | 350 % (min) | ASTM D638 |
Density | 1.20 ± 0.2 gm/cm3 | ASTM D792 |
Hardness | 40 ±5 Shore D | ASTM D2240 |
Water absorption | 0.5 % (max.) | ASTM D570 |
Accelerated ageing | (900 C for 7 Days) | ASTM D2671 |
a. Tensile Strength | ± 25% Variation | ASTM D638 |
b. Ultimate Elongation | ± 25% Variation | ASTM D638 |
Low Temperature Flexibility | No Cracking | ASTM D2671 |
(-400C for 4 hrs.) | ||
Continuous Temperature Limit | -45 to +1050 C | IEC 216 |
Dielectric Strength | 20 kV/mm.(min) | ASTM D149 |
Volume Resistivity | 1 x 1014 Ohm.cm (min) | ASTM D257 |
Dielectric constant | 5 (max.) | ASTM D150 |
Resistant to Tracking & Erosion | No Tracking, Erosion or Flame failure upto 3.25 kV for 20 min. |
ASTM D2303 |
Selection Chart | ||||
---|---|---|---|---|
Sr. No | Product Code | Width (mm) | Length (Mtr.) | Thickness (mm) |
1. | GBBS-2 | 670 mm | 15 | 2.0 |
2. | GBBS-2 | 670 mm | 15 | 3.0 |
3. | GBBS-3 | 670 mm | 15 | 5.0 |
4. | GBBS-3A | 970 mm | 15 | 3.0 |
5. | GBBS-5A | 970 mm | 15 | 5.0 |