Busbar Sleeve For 66 kv
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Bus Tube is heat shrinkable tube designed to insulate busbar systems up to 66KV & to protect against accidental flash-over. The tubes are manufactured from high quality non tracking crosslinked polyolefin material. Meets ANSI C37.20.2 standards for switchgear application up to 66 kV.
Features & Benefits
- Reduce Busbar clearance.
- Prevent Busbar from chemical corrosion effected by strong acid, alkali, salt etc.
- Solve the problem of insulation among Busbar in Bus Duct.
- Halogen free, flame retardant.
- High dielectric strength.
- Highly Flexible for use on straight or angled bars without creasing.
Diagram
Selection Chart – Extra Heavy Wall Tube [Upto 66KV]
Extra Heavy Wall Tube [Upto 66KV]
| Gala Size | D mm (min.) | d mm (max.) | T ±10% | Length |
|---|---|---|---|---|
| min. | max. | mm | mm | |
| GEHB 50/20 | 50 | 20 | 6.2 | 1500 |
| GEHB 75/28 | 75 | 28 | 6.2 | 1500 |
| GEHB 100/38 | 100 | 38 | 6.2 | 1500 |
| GEHB 120/45 | 120 | 45 | 6.2 | 1500 |
| GEHB 150/60 | 150 | 60 | 6.2 | 1500 |
Technical Specification
Technical Specification
| Properties | Value | Standard |
|---|---|---|
| Physical | ||
| Tensile Strength | 12 N/mm² (MPA)(min.) | ASTM D638 |
| Ultimate Elongation | 300% (Min.) | ASTM D638 |
| 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 | (120°C for 500 Hrs) | ASTM D2671 |
| a. Tensile Strength | 10 N/mm² (Mpa) (min.) | ASTM D 638 |
| b. Ultimate Elongation | 250 % (min.) | ASTM D638 |
| Low Temperature Flexibility (-40°C for 4 Hrs.) | No Cracking | ASTM D2671 |
| Heat Shock (250°C for 30 Min.) | No Cracking or flowing | ESI 09-11 |
| Shrink Temperature | 125°C | IEC 216 |
| Continuous Temperature limit | -40°C to +105°C | IEC 216 |
| Electrical | ||
| Dielectric Strength | 22 KV/mm. (Min.) | ASTM D149 |
| Volume Resistivity | 1 x 10¹⁴ Ohm.cm (min.) | ASTM D257 |
| Dielectric Constant | 5 (Max.) | ASTM D150 |
| Resistant to track & erosion | No Tracking, erosion or flame failure up to 3.25 KV for 20 min. | ASTM D2303 |
Clearance With Insulation
Clearances With Insulation
| Voltage | Phase to Phase (mm) | Phase to Ground (mm) | Un-Insulated Bus Bars |
|---|---|---|---|
| 66 KV | 390 | 520 | 630 |