Busbar Sleeve for 66 kV
GEHB is a heat-shrinkable, non-tracking cross-linked polyolefin sleeve that insulates busbar systems up to 66 kV and guards against accidental flashover, sized GEHB 50/20 to GEHB 150/60, meeting ANSI C37.20.2 for 66 kV switchgear.
- ANSI C37.20.2
- ASTM D149
- ASTM D150
Choose a size
Selection Chart
- D (min.)
- Minimum internal diameter as supplied
- d (max.)
- Maximum internal diameter after recovery
- T
- Thickness (±10%)
- Length
- Supplied length in mm
| Gala size | D(min.) | d(max.) | T(±10%) | Length |
|---|---|---|---|---|
| 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 |
D, d: internal diameter; T: thickness. Source: GALA BUSTUBE Insulation Sleeve (GEHB) catalogue sheet, Issue 2, January 2024.
Dimensions & Drawings
Bus Tube shrinks onto the bar with heat to insulate busbar systems up to 66 kV, reducing phase-to-phase clearance to 390 mm and phase-to-ground clearance to 520 mm against an uninsulated bar's 630 mm.
Covered on this page
- Clearances With Insulation
Features & Benefits
- Meets ANSI C37.20.2 for switchgear application up to 66 kV
- GEHB series: GEHB 50/20 to GEHB 150/60, 6.2 mm wall, 1500 mm length
- Cuts insulated clearance to 390 mm phase-to-phase and 520 mm phase-to-ground at 66 kV, against 630 mm uninsulated
- Dielectric strength 22 kV/mm (min., ASTM D149); no tracking, erosion or flame failure up to 3.25 kV for 20 min (ASTM D2303)
- Continuous temperature limit −40°C to +105°C (IEC 216)
- Non-tracking, cross-linked polyolefin — halogen free, flame retardant
- Highly flexible for straight or angled bars without creasing
Applications
- Insulating busbar systems in 66 kV switchgear
- Reducing busbar clearance
- Protecting busbars against chemical corrosion (acid, alkali, salt)
Standards & Compliance
- ANSI C37.20.2
- ASTM D149
- ASTM D150
- ASTM D257
- ASTM D570
- ASTM D638
- ASTM D792
- ASTM D2240
- ASTM D2303
- ASTM D2671
- ESI 09-11
- IEC 216
FAQs
Frequently Asked Questions
What is the Busbar Sleeve for 66 kV used for?
It is used for:
- Reducing busbar clearance
- Protecting busbars against chemical corrosion (acid, alkali, salt)
How do I choose the right size?
A heat-shrink part is chosen by two diameters. As supplied (D (min.)) it must open wider than the largest thing it has to slide over; after shrinking (d (max.)) it must close smaller than the smallest thing it has to grip. Measure both on your cable or busbar and pick the first code in the selection chart that satisfies both.
How is it installed?
Clean and degrease the surface, position the part, then shrink it with a gas torch or a hot-air gun: keep the heat moving round it with a smooth, brushing motion so it recovers evenly without scorching. Start at one end and work steadily along to the other.
Which standards and test methods are quoted for it?
These:
- ANSI C37.20.2
- ASTM D149
- ASTM D150
- ASTM D257
- ASTM D570
- ASTM D638
- ASTM D792
- ASTM D2240
- ASTM D2303
- ASTM D2671
Can I get a quote, a sample or a size that is not listed?
Send your cable details, quantity and application with the "Request a Quote or Sample" form at the foot of this page. For a size or variant that is not in the chart, describe what you need there, or use Technical support at the top of the page, and the technical team will confirm what can be supplied.
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