Heat Shrink Bus Bar Tubes

Heat Shrink Bus Bar Tubes Heat Shrink Bus Bar Tube PEMB and PEHB are red coloured medium wall and heavy wall unlined tubes designed to insulate busbar systems upto 36 KV and to protect against accidental flashover. The  tubes are manufactured from high quality non tracking crosslinked polyolefin material. Meets ANSI C37.20.2 standards for MV switchgear application up to 36 KV. Reduces Busbar clearance.High dielectric strength.Halogen free, flame retardant. Technical Specification Properties Value Standard Physical Tensile Strength 10 N/mm2 (Mpa) (min.) ASTM D638 Ultimate Elongation 350% (min) ASTM D638 Longitudinal Change -10% (max.) ASTM D2671 Density 1.20+0.2 gm/cm3 ASTM D792 Hardness 45+10 Shore D ASTM D2240 Water absorption 0.5% (max.) ASTM D570 Thermal Accelerated ageing (120oC for 500 hrs) ASTM D2671 Tensile Strength 8 N/mm2 (Mpa) (min.) ASTM D638 Ultimate Elongation 250% (min.) ASTM D638 Low Temperature Flexibility (-40oC for 4 hrs.) No Cracking ASTM D2671 Heat Shock (250oC for 30 min.) No Cracking or flowing ESI 09-11 Shrink Temperature 125oC IEC 216 Continuous Temperature Limit -40 to +105oC IEC 216 Electrical Dielectric Strength 18 KV/mm. (min) ASTM D149 Volume Resistivity 1 x 1014Ohm.cm (max) ASTM D257 Dielectric constant 5 (max.) ASTM D150 Resistant to track & erosion No Tracking, erosion or flame failure upto 3.25 KV for 20 min. ASTM D2303 Selection Chart (Medium Wall) Code D min (min) d max. (mm) T +10% (mm) Spool length (mtr) PEMB 16 6 2.5 30 PEMB 25 8 2.5 30 PEMB 30 12 2.5 30 PEMB 40 16 2.5 30 PEMB 50 20 2.5 30 PEMB 75 28 3.0 15 PEMB 100 38 3.0 15 PEMB 120 45 3.0 12 PEMB 140 52 3.0 1.5 PEMB 160 60 3.0 1.5 PEMB 180 65 3.0 1.5 PEMB 205 85 3.0 1.5 Selection Chart (Heavy Wall) Code D min (min) d max. (mm) T +10% (mm) Spool length (mtr) PEHB 25/8 25 8 3.7 20 PEMB 30/12 30 12 4.0 20 PEMB 40/16 40 16 4.0 20 PEMB 50/20 50 20 4.0 20 PEMB 75/28 75 28 4.0 15 PEMB 100/38 100 38 4.2 15 PEMB 120/45 120 45 4.2 12 PEMB 140/52 140 52 4.2 1.5 PEMB 160/60 160 60 4.5 1.5 PEMB 180/65 180 65 4.5 1.5 All dimensions are in mm D, d : Internal diameter ; T : ThicknessClearances With Insulation Voltage Medium Wall Tube (PEMB) Heavy Wall Tube (PEHB) Un-Insulated Bus Bars Ph. To Ph. Ph. To gr. Ph. To Ph. Ph. To gr. 12 KV 65 75 35 45 120 17.5 KV 85 105 55 65 160 24 KV 115 150 70 100 220 36 KV 200 285 140 190 320