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RAYCHEM MEDIUM VOLTAGE HEATSHRINK BUSBAR TAPE
Description
Tyco Electronics’ HVBT is a heat-shrinkable, adhesive-coated tape which provides insulation enhancement and protection against accidentally induced discharge. HVBT tape is designed to combine the integrity of a heat-shrinkable tubing with the versatility of a wraparound product.
HVBT is quick and easy to install. Upon application of heat the tape shrinks down and the adhesive lining melts amalgamating the overlapping layers together, producing a complete lap to lap seal. A single layer of HVBT tape, two-thirds overlapped, will provide AC voltage withstand (flashover protection) to at least 17.5 kV increasing to 25 kV if a second layer is applied. Although HVBT tape will stick to itself and other insulating materials it will not adhere to metal or porcelain allowing easy
removal for maintenance.
Applications
HVBT tape offers a simple and effective solution to the problems of retrofit insulation of busbars particularly where existing equipment cannot be dismantled. It can be
used for indoor and outdoor applications and is easily installed over a wide variety of shapes including complex connections.
Clearance Reduction
The table below indicates the clearance reductions which are possible using HVBT tape. These are derived from BIL, AC withstand, DC withstand and discharge
extinction tests. These clearances should not be adopted without testing by the user. Sharp electrodes and unusual geometries may require wider clearances.
Features and Benefits
• Compatible with all other products in the Raychem MV insulation enhancement system
• Easy to apply using readily available equipment
• Suitable for both indoor and outdoor use
• Excellent anti-tracking properties
• Continuous operating temperature up to 90˚C
• Extremely versatile and flexible at temperatures as low as -40˚C, the 30% shrink ratio enables coverage of almost any shape
• Good thermal emissivity and contact with busbars means no derating is required
• Manufactured from non-halogen based materials, reducing the toxic and corrosive effects in the event of fire
• Can be stored indefinitely at temperatures up to 50˚C without loss of performance
