Heat Shrink Busbar Insulation Sheet - Adhesive Coated (BUSSHEET)

About Heat Shrink Busbar Insulation Sheet - Adhesive Coated (BUSSHEET)

BUSSHEET is Gala's adhesive-coated, non-tracking, cross-linked polyolefin heat-shrinkable sheet for insulating bolted busbar joints. Busbar runs are usually insulated with heat-shrink busbar sleeve, but tees, elbows (L joints) and straight bolted splices have shapes a tube cannot follow. The sheet is cut to the joint, folded over it and shrunk in place, so the joint gets the same insulation as the run.

Installation: the busbars are first insulated with Gala busbar sleeve to within about 25 mm of the joint. The sheet is cut to size, folded adhesive-side-in over the joint, and its flaps are pinched between corner or mending plates held by spring clamps. A propane torch or hot-air gun shrinks it until it conforms over the bolts; the cut should extend at least 100 mm onto each leg before shrinking and overlap the existing insulation by 65 mm after. For a joint that must be opened again, an extra plate is shrunk between the layers and the sheet is punched and closed with nylon fasteners. For a sealed joint, mastic strips go on each leg before shrinking. No special mould is needed.

Two wall grades are made: GMHS (1.5 mm minimum) and GHHS (2.3 mm minimum). Gala's selection chart gives the cut sizes and the number of tee or elbow joints one sheet (up to 1200 mm long) yields for busbars 25 to 150 mm wide. Insulated joints let switchgear and panel builders work with smaller clearances. Void-filling mastic, sealant mastic and a clamp and bracket tool kit are available.

Manufactured by Gala in India. Datasheet and size selection on request.

Specifications

• Brand: Gala
• Product type: Heat shrinkable busbar joint insulation sheet, adhesive coated
• Material: Non-tracking cross-linked polyolefin with adhesive coating
• Colour: Red
• Voltage rating: Medium-voltage busbar joints up to 24 kV
• Operating temperature: -40 deg C to +105 deg C continuous
• Size range: For busbars 25 to 150 mm wide; sheet length up to 1200 mm
• Wall type / thickness: GMHS 1.5 mm minimum; GHHS 2.3 mm minimum
• Adhesive / sealant: Adhesive coated; optional void-filling and sealant mastic pieces (300 mm)
• Application: Insulating bolted busbar tees, elbows and straight joints in MV switchgear and panels
• Installation: Cut to size, clamped over the joint and shrunk with a gas torch or hot-air gun; reusable version closed with nylon fasteners
• Country of origin: India
• Shrink temperature: 125 deg C

Sizes

• 4565 | busbar width 25 mm | cut width A 205 mm min | B for T joint 85 mm, for L joint 85 mm | 14 T or 14 L joints per sheet
• 6095 | busbar width 50 mm | cut width A 295 mm min | B for T joint 130 mm, for L joint 120 mm | 9 T or 10 L joints per sheet
• 70120 | busbar width 75 mm | cut width A 345 mm min | B for T joint 150 mm, for L joint 150 mm | 8 T or 8 L joints per sheet
• 110150 | busbar width 100 mm | cut width A 455 mm min | B for T joint 240 mm, for L joint 200 mm | 5 T or 6 L joints per sheet
• 110180 | busbar width 150 mm | cut width A 555 mm min | B for T joint 300 mm, for L joint 240 mm | 4 T or 5 L joints per sheet
• Grades: GMHS 1.5 mm, GHHS 2.3 mm minimum thickness. Sheet length 1200 mm max. Optional: void-filling mastic piece 300 mm, sealant mastic piece 300 mm, Tool Kit 1 (basic clamp and bracket kit).

Applications: Switchgear and panel builders, busduct manufacturers, MV switchboards, substations, transformer and RMU manufacturers, electrical contractors, power plants and industrial MV installations