Select a section
- PowerGuard® cables are intended for use in wet or dry locations for distribution of single or three phase medium voltage power. These cables may be installed in ducts, exposed to sunlight or direct buried. Sizes 1/0 AWG and larger are approved for use in cable tray, marked “FOR CT USE”.
- Single conductor cable true-triple extrusion, dry cured insulation system consisting of a thermosetting semiconducting conductor shield, high dielectric strength ethylene propylene rubber (EPR) insulation, thermosetting semiconducting insulation shield, flat copper tape, black polyvinyl chloride (PVC) jacket.
- Conductor:
- Compact concentric stranded copper.
- Conductor Shield:
- Extruded thermosetting semiconducting cross-linked polyethylene (XLPE) shield which is free stripping from the conductor and bonded to the insulation.
- Insulation:
- Extruded, Ethylene Propylene Rubber (EPR) – 15 kV 133% insulation level.
- Insulation Shield:
- Extruded thermosetting semiconducting cross-linked polyethylene (XLPE) shield with controlled adhesion to the insulation providing the required balance between electrical integrity and ease of stripping.
- Metallic Shield:
- Flat, uncoated 5 mil thick copper tape helically applied with a minimum 25% overlap.
- Outer jacket:
- A polyvinyl chloride (PVC) jacket is extruded over the copper tape shield, meeting the physical requirements of Table 1, when tested by the methods specified in ICEA S-93-639. The jacket shall be free-stripping and not interfere with the contact between the flat copper tape and the underlying extruded insulation shield. The jacket is sunlight resistant and marked. The jacket shall contain a print legend marking, and sequential length (meter or feet) marking.
| Table 1 |
|---|
| Physical Properties of PVC Jacket |
| Unaged Tensile Strength, minimum (PSI) 1500 |
| Aged* Tensile Strength, minimum retention (%) 85 |
| Unaged Elongated, minimum (%) 100 |
| Aged* Elongated, minimum retention (%) 60 |
| Heat Distortion 1 hr at 121 ºC, maximum (%) 50 |
*Aged for 120 hrs at 100 ºC
| Temperature Rating |
|---|
| Insulated Conductor and Copper Tape Shield Temperature Ratings |
| Normal: | 105 ºC |
| Emergency*: | 140 ºC |
| Short-Circuit – Insulated Conductor: | 250 ºC |
| Short-Circuit – Copper Tape Shield: | 200 ºC |
*Operation at the emergency overload temperature shall not exceed 1500 hours cumulative during the lifetime of the cable.
| Standards |
|---|
| ASTM B496 – Compact Round Concentric-Lay-Stranded Copper Conductors |
| ASTM B3 – Soft or Annealed Copper Wire |
| ICEA S-93-639 – 5-46 kV Shielded Power Cable for Use in the Transmission and Distribution of Electric Energy |
| UL 1072 – Medium-Voltage Power Cables |
- UL listed as Type MV-105 – File E476447