Thick-wall shrink-to-fit insulation for copper and aluminum busbars in low-voltage switchgear and distribution panels.
| Models | MPG01 |
|---|---|
| Recovered wall | 0.60–1.10 mm by size |
| Operating temp | -40 to +125 °C |
| Voltage class | 0.6/1 kV |
| Standards | IEC 61439, UL 94 V-0, RoHS |
MPG01 is the low-voltage grade of the MPG busbar tubing family: a thick-wall radiation-crosslinked polyolefin product formulated for insulating copper and aluminum busbars in 0.6/1 kV distribution equipment. When shrunk onto the busbar, it forms a conformal insulation layer that resists tracking, reduces phase-to-phase and phase-to-ground clearance requirements, and protects against accidental contact.
The tubing is supplied in continuous spools or pre-cut sections that can be slipped over the busbar before or after joint assembly. Upon heating to 110-130°C, it recovers to grip the busbar surface without adhesive, relying on mechanical shrink force to maintain permanent contact. Compared with custom-molded boots and taping, MPG01 is the economical way to insulate complete low-voltage panel runs from a single stocked product range.
| Property | Test Method | Requirement |
|---|---|---|
| Limited oxygen index (LOI) | — | >30 |
| Low-temperature flexibility | -40°C | No cracking |
| Flame retardancy | UL 94 | V-0 equivalent |
| Tracking resistance | IEC 60587 | 1A 4.5 kV (typical for crosslinked PO) |
| Property | Test Method | Typical Value |
|---|---|---|
| Long-term operating temperature | — | 125°C |
| Tensile strength | ASTM D638 | 11.5 MPa |
| Elongation at break | ASTM D638 | 300% |
| Volume resistivity | IEC 93 | 2×10¹⁴ Ω·cm |
| Water absorption | ISO 62 | <0.5% |
| Tensile after aging (158°C, 7 d) | ASTM D638 | 11.5 MPa |
| Elongation after aging (158°C, 7 d) | ASTM D638 | 260% |
| Dielectric strength | IEC 243 | 23 kV/mm |
| Power frequency withstand | — | 4.5 kV, 60 s, no flashover |
| Wall bias | — | 10% |
| Longitudinal change (200°C, 3 min) | — | 5% |
Internal test data. Questions on parameters? Contact our engineers.
| Size | Expanded ID (mm) | Recovered ID (mm) | Wall (mm) | Spool (m) |
|---|---|---|---|---|
| Φ20 | 21.0 ±0.5 | 9.7 ±0.3 | 0.60 ±0.05 | 100 |
| Φ22 | 22.8 ±0.8 | 10.0 ±1.0 | 0.60 ±0.05 | 100 |
| Φ25 | 25.8 ±0.8 | 11.0 ±1.0 | 0.65 ±0.05 | 100 |
| Φ28 | 28.8 ±0.8 | 13.0 ±1.0 | 0.65 ±0.05 | 100 |
| Φ30 | 30.8 ±0.8 | 14.0 ±1.0 | 0.70 ±0.05 | 100 |
| Φ35 | 35.0 ±0.8 | 16.0 ±1.0 | 0.70 ±0.05 | 25 |
| Φ40 | 41.0 ±1.0 | 19.0 ±1.0 | 0.75 ±0.05 | 25 |
| Φ50 | 51.0 ±1.0 | 24.0 ±1.0 | 0.80 ±0.05 | 25 |
| Φ60 | 61.0 ±1.0 | 29.0 ±1.0 | 0.80 ±0.05 | 25 |
| Φ70 | 71.0 ±1.0 | 33.0 ±2.0 | 0.85 ±0.05 | 25 |
| Φ80 | 81.0 ±1.0 | 37.0 ±2.0 | 0.90 ±0.05 | 25 |
| Φ90 | 91.0 ±1.0 | 43.0 ±2.0 | 0.95 ±0.05 | 25 |
| Φ100 | 102 ±2.0 | 48.0 ±2.0 | 1.00 ±0.05 | 25 |
| Φ120 | 122 ±2.0 | 58.0 ±2.0 | 1.10 ±0.05 | 25 |
| Φ150 | 152 ±2.0 | 73.0 ±2.0 | 1.10 ±0.05 | 25 |
Standard color: black. Custom colors available — contact our sales team.
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Still deciding? Contact our engineers.
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