15kV Busbar Heat Shrink Casing (MPG10 Series)

Anti-tracking, flame-retardant heat shrink casing for 8.7/15kV copper and aluminium busbars in switchgear and panel boards.

MPG10 casing is a heavy-wall, anti-tracking heat shrink sleeve sized for 8.7/15kV busbars. It slips over a rectangular or flat copper or aluminium busbar, shrinks under hot air to hug the profile, and leaves a continuous insulating skin that raises the surface tracking resistance and lets phases sit closer together than bare-busbar air clearance allows.

In compact switchgear the limiting dimension is rarely the breaker -- it is the air gap between phases. Widening the cubicle costs sheet steel, floor space and money. A rated casing lets the designer recover that clearance on the busbar itself, which is why panel builders and switchgear OEMs treat it as a design input rather than an afterthought. The anti-tracking grade matters most in dusty, humid or mildly contaminated switchrooms where a plain sleeve would eventually track across its surface.

Technical specifications

Applications by industry

• Switchgear OEM busbar insulation
• Panel builders and switchboard manufacturers
• Substation and transformer bay busbars
• Phase-clearance reduction in compact cubicles
• Copper and aluminium busbar sleeving
• Retrofit insulation of exposed MV busbars

Why insulate the busbar instead of widening the cubicle

At 15kV the creepage and clearance numbers force a minimum phase gap. If you only have air, that gap drives the whole enclosure size. A rated anti-tracking casing interrupts the surface path and lets the designer close the mechanical spacing while keeping the electrical one. The casing also protects against accidental contact and against conductive dust building a tracking bridge. The alternative -- a bigger cubicle -- is a permanent cost on every unit built.

Fit to a rectangular busbar and seal the ends

Busbars are not round. Select the supplied ID to clear the busbar width plus height plus corner radius, then shrink with a hot-air tool and a reflector so the wall follows the corners instead of bridging them. The two ends are where moisture enters -- they must be sealed with end caps or potting, because water tracking along the bar under the sleeve defeats the casing. Check recovery at the corners, not just along the flat.

Inspection and traceability

We check wall thickness, recovered ID against the busbar section, and run inclined-plane tracking and flame tests on request for type-tested switchgear.

• Supplied and recovered ID versus busbar section
• Wall-thickness mapping along the length
• Inclined-plane tracking test on request
• Flammability (V-0) verification on request
• Hi-pot test on request for type-test packages

Related components

Common questions