8.7/15kV Busbar Heat Shrink Casing MPG10
Medium-wall cross-linked polyolefin casing for 8.7/15kV switchgear and substation busbar. Formulated for anti-tracking and anti-corona duty. It keeps dielectric strength in polluted enclosure air and resists the surface creepage that flashes over bare bus. Supplied expanded in ID Φ20–Φ180mm, recovered with heat onto copper or aluminium bar; red / yellow / green / black colours; service range -55℃~+125℃; built to ASTM D2671. Send the bar section and run length and we return the size code.
Specification
| Material | Polyolefin (cross-linked PE) |
|---|---|
| Operating temperature | -55℃~+125℃ |
| Voltage class | 8.7/15KV |
| Wall type | Medium-thick wall |
| Colors | Red / yellow / green / black |
| Standards | ASTM D2671 |
| Size range | ID Φ20~Φ180mm |
Cross-Reference & Industry Standard Mapping
Medium and high voltage busbar protective tubing cross-reference guide for electrical switchgear and panel builders:
| Wellele Series | Voltage Rating | Raychem / TE Equivalent | 3M Equivalent | DSG-Canusa / MOCAP | Reference Standards |
|---|---|---|---|---|---|
| WLL-BBN-10 | 1 kV - 10 kV (LV/MV) | BMM | BBI-A (LV Series) | Deray-HB | IEC 60684-3-214 |
| WLL-BBN-24 | 15 kV - 24 kV (MV) | BBIT | BBI-6A | Deray-HBM | IEC 60060, GB/T 10580 |
| WLL-BBN-35 | 26 kV - 35 kV (HV) | BBIT (35kV Class) | BBI-10A | Deray-HBT | ASTM D2671, IEC 60243-1 |
* Note: All competitor part numbers are registered trademarks of their respective owners and are listed for engineering reference and cross-identification only.
Where MPG10 sits
MPG10 is the 8.7/15kV class of our busbar casing line: the grade for distribution switchgear, panel boards and substation bus at that voltage. Its job is component-level insulation over the bar: a continuous anti-tracking cover that keeps dust and moisture off the conductor surface and holds dielectric strength in polluted air. The formulation is the argument here; the wall is medium-thick, lighter than the 26/35kV MPG35 grade, which is built for the heavier gradient at that class. Match casing class to system voltage and do not substitute down at 26/35kV.
Bar geometry and installation limits
Size from the section, read as width × thickness: the supplied ID must pass the diagonal, the recovered ID must grip the flat. The casing shortens several percent longitudinally during recovery, so order cut lengths with margin past each joint face. Edge preparation matters at any wall thickness: deburr and radius bar edges before recovery. The work itself is de-energized hot-air recovery, centre-outward on each section, with long spans supported so the softened wall does not sag before it sets.
System context
The casing's class marking is a component rating; the panel's insulation coordination (phase spacing, support insulators, clearances) remains the designer's scope, and the cover supplements rather than replaces those dimensions. Batch certificates are supplied; for tenders we align documentation to the standard your market names.
Frequently asked questions
What busbar geometry does MPG10 cover?
The size range is ID Φ20–Φ180mm in the supplied state, which covers the flat-bar sections common in 8.7/15kV switchgear. Size it from the bar section as width × thickness: the supplied ID must pass the section's diagonal, and the recovered ID must close onto the bar width with light interference. Send the section dimensions and run lengths and we return the size codes and cut lengths.
What do anti-tracking and anti-corona mean on this product?
They describe the formulation, not extra components. Anti-tracking: the recovered surface resists the carbonized leakage paths that dust plus moisture grow on insulating surfaces in polluted air. Anti-corona: the wall withstands the surface discharge activity present around medium-voltage busbar. Together they are why the casing keeps dielectric strength in dirty substation enclosures instead of gradually tracking to flashover.
When is MPG10 the right class instead of MPG35?
Match the casing class to the busbar's system voltage: MPG10 is the 8.7/15kV grade for distribution switchgear at that class; MPG35 is the 26/35kV grade with a heavier wall. Do not use MPG10 on a 26/35kV system. Wall thickness and creepage design differ between the classes. If your panel sits at a class we do not list, tell us the voltage and we answer straight whether we can cover it.
How is the casing installed on an existing switchgear run?
De-energize, bond, clean and dry the bar; deburr edges. Slide pre-expanded lengths over the bar end or through a disconnect point, overlap each joint face, then recover with an even hot-air pass working from the centre of each section outward. The medium wall needs less soak time than the 26/35kV thick-wall grade, but an unsupported span will still droop while hot: rest long runs on their supports before heating. Cut with margin: the cover pulls back along the bar as it closes.
What maintenance does an insulated busbar run need?
The casing itself is maintenance-free once recovered, but the enclosure is not: keep the cabinet dry and clean, because heavy pollution loading on any insulating surface (casing included) erodes the anti-tracking margin over time. Inspect covers during scheduled outages for mechanical damage from moved tools or dropped parts, and replace damaged sections rather than taping over them.
How does the casing behave at bends and bolted joints?
The medium wall closes over bends and bolted connections without shims or filler. Two precautions keep the cover intact: a burr under a closing wall is the usual cause of a split cover, so deburr and radius edges first, and over a bend the outside radius thins as the wall stretches: rest the casing on the bend support so it sets without pulling. On assembled joints, choose an ID that clears the bolt heads; where the build sequence allows, slide casing over the bar before final bolt-up.
Request a quote for MPG10 busbar casing
Send the bar section (width × thickness), length per bar, phase colours and quantity. We return the size code, cut lengths and lead time.
Certifications & Compliance
8.7/15KV Power Bus-Bar Heat Shrinkable Protective Casing MPG10 is built to the following standards. Batch certificates are supplied; for a bid we align documentation to your market and can provide type-test backing on request.
View our verified UL / SGS / RoHS certificates →
Size range & specification notes
Standard IDs run Φ20–Φ180mm, lengths cut to your bar dimensions. Per-size width × thickness coverage and recovered wall values are published after verification: see the DATA_REQUIRED note above.