RG7OZR / RG7H1OZR Armoured EPR Medium Voltage Power Cable
TEBAOFLEX RG7OZR / RG7H1OZR is a three-core armoured medium-voltage power cable for fixed energy-distribution installations. The construction combines compact stranded copper conductors, G7 HEPR insulation, steel-wire armour and a red PVC sheath for routes that require added mechanical protection.
The RG7OZR series covers 1.8/3 kV and 3.6/6 kV classes, while RG7H1OZR covers higher 6/10 kV through 18/30 kV classes. Confirm the final voltage class, cross-section, route and protection requirements before selection.
Construction
- Conductors: Class 2 compact stranded plain copper.
- Insulation: G7 HEPR rubber compound with extruded semi-conductive layers where applicable.
- Core screen: copper tapes on individual cores for the RG7H1OZR higher-voltage construction.
- Inner sheath: extruded PVC compound that fills the spaces between cores.
- Armour: galvanized flat steel wires with helically wound tape.
- Outer sheath: red Rz-grade PVC compound.
Key Ratings and Installation Conditions
| Parameter | Specification |
|---|---|
| Product series | RG7OZR / RG7H1OZR |
| Rated voltage classes | 1.8/3 kV, 3.6/6 kV, 6/10 kV, 8.7/15 kV and 18/30 kV |
| Core configuration | Three cores |
| Maximum operating temperature | 90°C |
| Minimum operating temperature | -15°C without mechanical shocks |
| Maximum short-circuit temperature | 250°C |
| Minimum installation temperature | 0°C |
| Recommended minimum bending radius | 16 × cable diameter |
| Recommended maximum tensile stress | 60 N/mm² of copper cross-section |
| Standard references | IEC 60502, CEI 20-13, EN 60332-1-2, EN 60332-3-24 and EN 50267-2-1 |
Voltage Series Overview
| Series | Rated Voltage Uo/U | Typical Conductor Range | Average Insulation Thickness | Example 3-Core 50 mm² Current Rating in Air |
|---|---|---|---|---|
| RG7OZR | 1.8/3 kV | 3 × 10 mm² to 3 × 400 mm² | 2.0 mm | 200 A |
| RG7H1OZR | 6/10 kV | 3 × 10 mm² to 3 × 400 mm² | 3.4 mm | 205 A |
| RG7H1OZR | 8.7/15 kV | 3 × 16 mm² to 3 × 300 mm² | 4.5 mm | 205 A |
| RG7H1OZR | 18/30 kV | 3 × 50 mm² to 3 × 240 mm² | 8.0 mm | 210 A |
Current ratings depend on installation conditions. In particular, ambient temperature, grouping, soil thermal resistivity and installation route affect the final design calculation.
Typical Applications
- Power transmission between transformer rooms and large loads
- Fixed industrial and infrastructure power-distribution routes
- Air, open-pass and underground installations where the specified protection is suitable
- Projects requiring an armoured three-core HEPR-insulated medium-voltage cable
Selection Checklist
- Confirm the required Uo/U voltage class and system voltage.
- Select the conductor cross-section using the actual current and installation conditions.
- Allow for the 16 × cable-diameter bending radius during layout.
- Specify route details and mechanical-protection requirements for technical review.
Request a Quote
Send TEBAOFLEX the voltage class, conductor size, required length, installation method and destination. Contact our technical sales team for an armoured medium-voltage cable quotation.
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Frequently Asked Questions
What is the difference between RG7OZR and RG7H1OZR?
RG7OZR covers the 1.8/3 kV and 3.6/6 kV classes, while RG7H1OZR covers the higher-voltage series from 6/10 kV to 18/30 kV.
Does this cable include armour?
Yes. The listed construction uses galvanized flat steel-wire armour with helically wound tape.
Can TEBAOFLEX review the required configuration?
Yes. Provide the voltage class, conductor cross-section, route and installation conditions for review.
