Heat Shrink Right Angle and Straight Boot for Bushings (ANGLEBOOT)

About Heat Shrink Right Angle and Straight Boot for Bushings (ANGLEBOOT)

Inside the cable box of a transformer, motor or switchgear panel, the cable lug, bolt and bushing terminal are often closer to each other and to earth than normal air clearance allows. In humid conditions, with dust, or when rodents get in, that gap can flash over, and surge impulses make it worse. Gala's ANGLEBOOT covers each bushing connection with a layer of insulation.

The boots are moulded from non-tracking cross-linked polyolefin and coated inside with water-resistant red mastic. The right-angle boot (GRB) fits where the cable core turns 90 degrees onto the bushing; the straight boot (GSB) fits where the core runs straight onto it.

To fit a right-angle boot: set the cable breakout and termination in their final position, slide the boots over the cores, bolt the lugs to the bushings, wrap mastic tape round the bushing nut, bolt and lug barrel, then position the boot over the bushing and shrink it with a propane or butane torch from the inside of the bend, top first and then downwards. The boots shrink above 125 deg C; let them cool before applying strain.

Gala's guaranteed values include tracking resistance (no tracking, erosion or flame failure at 3.25 kV for 20 min, ASTM D2303), 15 kV/mm minimum dielectric strength, 12 N/mm2 minimum tensile strength and a continuous temperature limit of -40 to +100 deg C. Gala is an ISO 9001, ISO 14001 and ISO 45001 certified manufacturer.

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

Specifications

• Brand: Gala
• Product type: Heat-shrinkable bushing boot, right-angle and straight
• Material: Non-tracking cross-linked polyolefin
• Colour: Red (orange-red)
• Operating temperature: -40 to +100 deg C (continuous)
• Size range: GRB-1 to GRB-3 (right angle), GSB-1 to GSB-3 (straight); bushing end recovering to 34 to 72 mm, cable end to 16 to 34 mm
• Wall type / thickness: Recovered wall 3.6 to 4.5 mm
• Adhesive / sealant: Water-resistant red mastic coating inside
• Application: Insulating bushing connections in cable termination boxes with reduced clearances
• Installation: Mastic tape over the connection, then heat-shrink the boot with a gas torch
• Country of origin: India
• Shrink temperature: 125 deg C
• Tracking resistance: No tracking, erosion or flame failure at 3.25 kV for 20 min, ASTM D2303 (Gala guaranteed value)
• Dielectric strength: 15 kV/mm min (ASTM D149)
• Tensile strength: 12 N/mm2 min (ASTM D638)
• Elongation: 350 % min (ASTM D638)

Sizes

• All in mm. ID = supplied (min) / after free recovery (max). D = bushing end, d = cable end.
• Right angle boots (GRB) | D | d | Leg lengths P supplied / R recovered (min) | Wall
• GRB-1 | 78 / 35 | 34 / 16 | 160 / 130 | 4.0
• GRB-2 | 78 / 37 | 52 / 27 | 170 / 140 | 4.5
• GRB-2A | 90 / 37 | 67 / 27 | 170 / 140 | 4.5
• GRB-3 | 145 / 72 | 67 / 34 | 170 / 150 | 4.5
• Straight boots (GSB) | D | d | Lengths after recovery A / L / B (min) | Wall
• GSB-1 | 80 / 34 | 34 / 21 | 140 / 225 / 30 | 3.6
• GSB-2 | 80 / 35 | 57 / 22 | 140 / 225 / 30 | 3.6
• GSB-2A | 100 / 36 | 57 / 22 | 140 / 225 / 30 | 3.6
• GSB-3 | 140 / 65 | 90 / 33 | 155 / 250 / 40 | 4.0

Applications: Transformer cable boxes, motor terminal boxes, switchgear and RMU cable compartments, distribution substations, power utilities, industrial plants, panel builders