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INDUSTRIAL CABLES

RG7OZR / RG7H1OZR Three-Core Armoured HEPR Cable

Three-core HEPR G7 insulated, flat-steel-wire-armoured PVC-sheathed power cable family. RG7OZR covers 1.8/3–3.6/6 kV without individual copper-tape screens; RG7H1OZR covers 6/10–18/30 kV with individually screened cores.

Product information
Product overview

RG7OZR and RG7H1OZR are related three-core armoured HEPR-insulated power cables with a red PVC outer sheath. Their shared features are compact Class 2 plain-copper conductors, G7 HEPR insulation, a PVC inner sheath and galvanized flat steel wire armour. The electrical boundary between the two model names matters: the supplied source uses RG7OZR for U₀/U 1.8/3 and 3.6/6 kV without individual copper-tape core screens, while RG7H1OZR covers 6/10 through 18/30 kV with copper-tape-screened cores and extruded semiconductive layers.

Select the exact model and voltage before choosing a diameter or termination. The armour can serve a protective mechanical role, but it does not make the two screen constructions interchangeable. Confirm armour earthing, metallic-screen continuity, gland design and fault-current duty against the project diagram. Both source variants include extensive voltage-specific rows for size, insulation thickness, outer diameter, weight, air/buried current, resistance, reactance and capacitance.

Use the source guidance for fixed transformer-to-load transmission in air, ducts, open routes or compliant burial. If the route does not need this flat-steel-wire armour, compare the unarmoured RG7H1OR; consult the industrial cable range for further power designs.

Construction

Construction

Both designations are three-core, HEPR-insulated and PVC-sheathed with galvanized flat steel wire armour. The core-screen layer distinguishes the two source models.

RG7OZR versus RG7H1OZR source layer comparison
LayerRG7OZR 1.8/3–3.6/6 kVRG7H1OZR 6/10–18/30 kV
ConductorClass 2 compact plain copperClass 2 compact plain copper
Semiconductive screensNot specified around individual coresExtruded inner and cold-strippable outer layers
InsulationG7 HEPRG7 HEPR
Metallic core screenNo individual copper-tape screen; source assigns global-screen function to armourWrapped plain-copper tapes around cores
Core assemblyPhase bands/threads, extruded PVC inner sheathPhase bands/threads, extruded PVC inner sheath
ArmourGalvanized flat steel wires with helical tapeGalvanized flat steel wires with helical tape
Outer sheathRed Rz PVCRed Rz PVC
RG7OZR / RG7H1OZR armoured HEPR cable construction cross-section showing cores and layers
RG7OZR / RG7H1OZR Three-Core Armoured HEPR Cable construction illustration; verify the ordered build against its approved drawing.
Applications

Applications

The source family serves fixed energy routes between transformer rooms and larger power users where flat steel wire armour is specified. It describes laying in air, pipe, open route and certain underground routes subject to CEI 11-17 Article 4.3.11. Check burial conditions, cable handling and sheath exposure against the design before choosing direct burial.

Specify RG7OZR for the source 1.8/3 or 3.6/6 kV unscreened-core variant; specify RG7H1OZR for the 6/10–18/30 kV individually copper-tape-screened variant. This difference controls termination and bonding details. The source recommends a 16 × OD bend and 60 N/mm² maximum pulling stress based on copper area. Confirm actual cable OD, pulling route and gland size from the chosen row.

For a three-core cable without flat steel wire armour, compare RG7H1OR.

When each phase must run as a separate cable rather than inside a three-core armoured assembly, compare the RG7H1R single-core HEPR insulated power cable, which keeps the G7 HEPR insulation and red PVC sheath with a copper-wire screen.

RG7OZR / RG7H1OZR armoured HEPR cable, armoured medium-voltage cable in an industrial cable route
Illustrative application setting for RG7OZR / RG7H1OZR Three-Core Armoured HEPR Cable; final cable route and terminations depend on the equipment design.
Specifications

Specifications

RG7 HEPR-insulated PVC-sheathed cable selection limits
Selection propertySource range or value
ConductorClass 2 compact stranded plain copper
HEPR insulationG7, lead-free in supplied catalogue
Max continuous operating temperature+90 °C
Minimum operating temperature−15 °C without mechanical shocks
Max short-circuit conductor temperature+250 °C
Minimum installation temperature0 °C
Recommended maximum pulling stress60 N/mm² of copper cross section
RG7OZR and RG7H1OZR voltage boundary
ModelRated U₀/UMax operating Uₘ from source tablesScreen construction
RG7OZR1.8/3 and 3.6/6 kV3.6 and 7.2 kVGlobal armour screen; no individual copper-tape core screens
RG7H1OZR6/10, 8.7/15, 12/20 and 18/30 kV12, 17.5, 24 and 36 kVCopper tapes around individual cores plus armour
RG7 armoured installation limits
Mechanical parameterSource value
Recommended minimum bend16 × OD
Maximum recommended pulling stress60 N/mm² of copper conductor section
Minimum installation temperature0 °C

RG7OZR 1.8/3 kV size and electrical data

RG7OZR 1.8/3 kV configurations, dimensions and reference current ratings
Model + conductorConductor Ø mmInsulation mmMax OD mmApprox. kg/kmAir ABuried A
RG7OZR 3 x 10 mm² 1.8/3 kV4.02.029.013708189
RG7OZR 3 x 16 mm² 1.8/3 kV4.82.031.01690105115
RG7OZR 3 x 25 mm² 1.8/3 kV6.02.034.02100138148
RG7OZR 3 x 35 mm² 1.8/3 kV7.02.036.52500166175
RG7OZR 3 x 50 mm² 1.8/3 kV8.12.039.53035200208
RG7OZR 3 x 70 mm² 1.8/3 kV9.72.043.03880250255
RG7OZR 3 x 95 mm² 1.8/3 kV11.42.047.54900305303
RG7OZR 3 x 120 mm² 1.8/3 kV12.92.051.55900351345
RG7OZR 3 x 150 mm² 1.8/3 kV14.32.054.56850398385
RG7OZR 3 x 185 mm² 1.8/3 kV16.02.058.58180455435
RG7OZR 3 x 240 mm² 1.8/3 kV18.32.064.510300540505
RG7OZR 3 x 300 mm² 1.8/3 kV21.02.077.012500615565
RG7OZR 3 x 400 mm² 1.8/3 kV23.22.078.515500715645
RG7OZR 1.8/3 kV conductor and 50 Hz electrical characteristics
Model + conductorMax DC Ω/km at 20°CAC Ω/km at 90°CReactance Ω/kmCapacitance µF/km at 50 Hz
RG7OZR 3 x 10 mm² 1.8/3 kV1.832.340.110.19
RG7OZR 3 x 16 mm² 1.8/3 kV1.151.470.100.23
RG7OZR 3 x 25 mm² 1.8/3 kV0.7270.9270.0970.27
RG7OZR 3 x 35 mm² 1.8/3 kV0.5240.6690.0930.30
RG7OZR 3 x 50 mm² 1.8/3 kV0.3870.4940.0880.34
RG7OZR 3 x 70 mm² 1.8/3 kV0.2680.3420.0840.40
RG7OZR 3 x 95 mm² 1.8/3 kV0.1930.2470.0810.45
RG7OZR 3 x 120 mm² 1.8/3 kV0.1530.1970.0790.50
RG7OZR 3 x 150 mm² 1.8/3 kV0.1240.1590.0770.55
RG7OZR 3 x 185 mm² 1.8/3 kV0.09910.1290.0760.60
RG7OZR 3 x 240 mm² 1.8/3 kV0.07540.09900.0740.68
RG7OZR 3 x 300 mm² 1.8/3 kV0.06010.08070.0720.75
RG7OZR 3 x 400 mm² 1.8/3 kV0.04700.06510.0710.83

Reference values are indicative. Confirm nominal dimensions and approximate mass on the project drawing; buried-current figures assume ground thermal resistivity of 100 °C cm/W.

RG7OZR 3.6/6 kV size and electrical data

RG7OZR 3.6/6 kV configurations, dimensions and reference current ratings
Model + conductorConductor Ø mmInsulation mmMax OD mmApprox. kg/kmAir ABuried A
RG7OZR 3 x 10 mm² 3.6/6 kV4.03.033.516957885
RG7OZR 3 x 16 mm² 3.6/6 kV4.83.036.51970103108
RG7OZR 3 x 25 mm² 3.6/6 kV6.03.039.02580130138
RG7OZR 3 x 35 mm² 3.6/6 kV7.03.041.53040160165
RG7OZR 3 x 50 mm² 3.6/6 kV8.13.044.03500190195
RG7OZR 3 x 70 mm² 3.6/6 kV9.73.048.54400235240
RG7OZR 3 x 95 mm² 3.6/6 kV11.43.052.55555285285
RG7OZR 3 x 120 mm² 3.6/6 kV12.93.056.56545330330
RG7OZR 3 x 150 mm² 3.6/6 kV14.33.059.57450373365
RG7OZR 3 x 185 mm² 3.6/6 kV16.03.064.58900430415
RG7OZR 3 x 240 mm² 3.6/6 kV18.33.069.511000503480
RG7OZR 3 x 300 mm² 3.6/6 kV21.03.076.513250577540
RG7OZR 3 x 400 mm² 3.6/6 kV23.23.083.516200670620
RG7OZR 3.6/6 kV conductor and 50 Hz electrical characteristics
Model + conductorMax DC Ω/km at 20°CAC Ω/km at 90°CReactance Ω/kmCapacitance µF/km at 50 Hz
RG7OZR 3 x 10 mm² 3.6/6 kV1.832.340.120.15
RG7OZR 3 x 16 mm² 3.6/6 kV1.151.470.120.17
RG7OZR 3 x 25 mm² 3.6/6 kV0.7270.9270.110.20
RG7OZR 3 x 35 mm² 3.6/6 kV0.5240.6690.100.23
RG7OZR 3 x 50 mm² 3.6/6 kV0.3870.4940.0970.26
RG7OZR 3 x 70 mm² 3.6/6 kV0.2680.3420.0920.30
RG7OZR 3 x 95 mm² 3.6/6 kV0.1930.2470.0890.33
RG7OZR 3 x 120 mm² 3.6/6 kV0.1530.1970.0860.37
RG7OZR 3 x 150 mm² 3.6/6 kV0.1240.1590.0840.40
RG7OZR 3 x 185 mm² 3.6/6 kV0.09910.1290.0820.44
RG7OZR 3 x 240 mm² 3.6/6 kV0.07540.09900.0790.49
RG7OZR 3 x 300 mm² 3.6/6 kV0.06010.08070.0770.54
RG7OZR 3 x 400 mm² 3.6/6 kV0.04700.06510.0750.60

Reference values are indicative. Confirm nominal dimensions and approximate mass on the project drawing; buried-current figures assume ground thermal resistivity of 100 °C cm/W.

RG7H1OZR 6/10 kV size and electrical data

RG7H1OZR 6/10 kV configurations, dimensions and reference current ratings
Model + conductorConductor Ø mmInsulation mmMax OD mmApprox. kg/kmAir ABuried A
RG7H1OZR 3 x 10 mm² 6/10 kV4.03.441.526657177
RG7H1OZR 3 x 16 mm² 6/10 kV4.83.444.03065105111
RG7H1OZR 3 x 25 mm² 6/10 kV6.03.447.33555143145
RG7H1OZR 3 x 35 mm² 6/10 kV7.03.450.04080170172
RG7H1OZR 3 x 50 mm² 6/10 kV8.13.453.04735205203
RG7H1OZR 3 x 70 mm² 6/10 kV9.73.457.45685253250
RG7H1OZR 3 x 95 mm² 6/10 kV11.43.460.36880305296
RG7H1OZR 3 x 120 mm² 6/10 kV12.93.465.38135353337
RG7H1OZR 3 x 150 mm² 6/10 kV14.33.468.59360393375
RG7H1OZR 3 x 185 mm² 6/10 kV16.03.472.510920447425
RG7H1OZR 3 x 240 mm² 6/10 kV18.33.478.613480525490
RG7H1OZR 3 x 300 mm² 6/10 kV21.03.484.616020595550
RG7H1OZR 3 x 400 mm² 6/10 kV23.23.490.616865677620
RG7H1OZR 6/10 kV conductor and 50 Hz electrical characteristics
Model + conductorMax DC Ω/km at 20°CAC Ω/km at 90°CReactance Ω/kmCapacitance µF/km at 50 Hz
RG7H1OZR 3 x 10 mm² 6/10 kV1.832.340.140.16
RG7H1OZR 3 x 16 mm² 6/10 kV1.151.470.130.18
RG7H1OZR 3 x 25 mm² 6/10 kV0.7270.9270.120.21
RG7H1OZR 3 x 35 mm² 6/10 kV0.5240.6690.110.23
RG7H1OZR 3 x 50 mm² 6/10 kV0.3870.4940.110.26
RG7H1OZR 3 x 70 mm² 6/10 kV0.2680.3420.100.29
RG7H1OZR 3 x 95 mm² 6/10 kV0.1930.2470.0970.32
RG7H1OZR 3 x 120 mm² 6/10 kV0.1530.1970.0940.36
RG7H1OZR 3 x 150 mm² 6/10 kV0.1240.1590.0910.38
RG7H1OZR 3 x 185 mm² 6/10 kV0.09910.1290.0880.42
RG7H1OZR 3 x 240 mm² 6/10 kV0.07540.09900.0850.47
RG7H1OZR 3 x 300 mm² 6/10 kV0.06010.08070.0840.52
RG7H1OZR 3 x 400 mm² 6/10 kV0.04700.06510.0820.57

Reference values are indicative. Confirm nominal dimensions and approximate mass on the project drawing; buried-current figures assume ground thermal resistivity of 100 °C cm/W.

RG7H1OZR 8.7/15 kV size and electrical data

RG7H1OZR 8.7/15 kV configurations, dimensions and reference current ratings
Model + conductorConductor Ø mmInsulation mmMax OD mmApprox. kg/kmAir ABuried A
RG7H1OZR 3 x 16 mm² 8.7/15 kV4.84.549.537009598
RG7H1OZR 3 x 25 mm² 8.7/15 kV6.04.552.54295142140
RG7H1OZR 3 x 35 mm² 8.7/15 kV7.04.555.04805171168
RG7H1OZR 3 x 50 mm² 8.7/15 kV8.14.557.35500205200
RG7H1OZR 3 x 70 mm² 8.7/15 kV9.74.561.56559252245
RG7H1OZR 3 x 95 mm² 8.7/15 kV11.44.565.57785303290
RG7H1OZR 3 x 120 mm² 8.7/15 kV12.94.569.59080347327
RG7H1OZR 3 x 150 mm² 8.7/15 kV14.34.572.510355390365
RG7H1OZR 3 x 185 mm² 8.7/15 kV16.04.576.511050446413
RG7H1OZR 3 x 240 mm² 8.7/15 kV18.34.582.513300520476
RG7H1OZR 3 x 300 mm² 8.7/15 kV21.04.588.615850595535
RG7H1OZR 8.7/15 kV conductor and 50 Hz electrical characteristics
Model + conductorMax DC Ω/km at 20°CAC Ω/km at 90°CReactance Ω/kmCapacitance µF/km at 50 Hz
RG7H1OZR 3 x 16 mm² 8.7/15 kV1.151.470.140.15
RG7H1OZR 3 x 25 mm² 8.7/15 kV0.7270.9270.130.18
RG7H1OZR 3 x 35 mm² 8.7/15 kV0.5240.6690.120.19
RG7H1OZR 3 x 50 mm² 8.7/15 kV0.3870.4940.120.21
RG7H1OZR 3 x 70 mm² 8.7/15 kV0.2680.3420.110.24
RG7H1OZR 3 x 95 mm² 8.7/15 kV0.1930.2470.100.26
RG7H1OZR 3 x 120 mm² 8.7/15 kV0.1530.1970.100.29
RG7H1OZR 3 x 150 mm² 8.7/15 kV0.1240.1590.0970.31
RG7H1OZR 3 x 185 mm² 8.7/15 kV0.09910.1290.0940.34
RG7H1OZR 3 x 240 mm² 8.7/15 kV0.07540.09900.0900.37
RG7H1OZR 3 x 300 mm² 8.7/15 kV0.06010.08070.0880.42

Reference values are indicative. Confirm nominal dimensions and approximate mass on the project drawing; buried-current figures assume ground thermal resistivity of 100 °C cm/W.

RG7H1OZR 12/20 kV size and electrical data

RG7H1OZR 12/20 kV configurations, dimensions and reference current ratings
Model + conductorConductor Ø mmInsulation mmMax OD mmApprox. kg/kmAir ABuried A
RG7H1OZR 3 x 35 mm² 12/20 kV7.05.559.54975173177
RG7H1OZR 3 x 50 mm² 12/20 kV8.15.562.56175203208
RG7H1OZR 3 x 70 mm² 12/20 kV9.75.567.07305251255
RG7H1OZR 3 x 95 mm² 12/20 kV11.45.570.58540303301
RG7H1OZR 3 x 120 mm² 12/20 kV12.95.575.09925348342
RG7H1OZR 3 x 150 mm² 12/20 kV14.35.578.011270393381
RG7H1OZR 3 x 185 mm² 12/20 kV16.05.581.512935448431
RG7H1OZR 3 x 240 mm² 12/20 kV18.35.588.015625520495
RG7H1OZR 3 x 300 mm² 12/20 kV21.05.594.018300595555
RG7H1OZR 12/20 kV conductor and 50 Hz electrical characteristics
Model + conductorMax DC Ω/km at 20°CAC Ω/km at 90°CReactance Ω/kmCapacitance µF/km at 50 Hz
RG7H1OZR 3 x 35 mm² 12/20 kV0.5240.6690.130.17
RG7H1OZR 3 x 50 mm² 12/20 kV0.3870.4940.120.18
RG7H1OZR 3 x 70 mm² 12/20 kV0.2680.3420.110.21
RG7H1OZR 3 x 95 mm² 12/20 kV0.1930.2470.100.23
RG7H1OZR 3 x 120 mm² 12/20 kV0.1530.1970.100.25
RG7H1OZR 3 x 150 mm² 12/20 kV0.1240.1590.100.27
RG7H1OZR 3 x 185 mm² 12/20 kV0.09910.1290.0980.29
RG7H1OZR 3 x 240 mm² 12/20 kV0.07540.09900.0940.32
RG7H1OZR 3 x 300 mm² 12/20 kV0.06010.08070.0920.35

Reference values are indicative. Confirm nominal dimensions and approximate mass on the project drawing; buried-current figures assume ground thermal resistivity of 100 °C cm/W.

RG7H1OZR 18/30 kV size and electrical data

RG7H1OZR 18/30 kV configurations, dimensions and reference current ratings
Model + conductorConductor Ø mmInsulation mmMax OD mmApprox. kg/kmAir ABuried A
RG7H1OZR 3 x 50 mm² 18/30 kV8.18.076.08450202205
RG7H1OZR 3 x 70 mm² 18/30 kV9.78.079.59610250252
RG7H1OZR 3 x 95 mm² 18/30 kV11.48.083.510980302300
RG7H1OZR 3 x 120 mm² 18/30 kV12.98.088.012680345340
RG7H1OZR 3 x 150 mm² 18/30 kV14.38.090.014130390378
RG7H1OZR 3 x 185 mm² 18/30 kV16.08.095.015645445428
RG7H1OZR 18/30 kV conductor and 50 Hz electrical characteristics
Model + conductorMax DC Ω/km at 20°CAC Ω/km at 90°CReactance Ω/kmCapacitance µF/km at 50 Hz
RG7H1OZR 3 x 50 mm² 18/30 kV0.3870.4940.130.15
RG7H1OZR 3 x 70 mm² 18/30 kV0.2680.3420.130.16
RG7H1OZR 3 x 95 mm² 18/30 kV0.1930.2470.120.18
RG7H1OZR 3 x 120 mm² 18/30 kV0.1530.1970.120.19
RG7H1OZR 3 x 150 mm² 18/30 kV0.1240.1590.110.20
RG7H1OZR 3 x 185 mm² 18/30 kV0.09910.1290.110.22

Reference values are indicative. Confirm nominal dimensions and approximate mass on the project drawing; buried-current figures assume ground thermal resistivity of 100 °C cm/W.

Standards

Standards

Reference standards for this armoured family include CEI 20-13 and IEC 60502 as structure/electrical/mechanical references; CEI 20-16 for partial-discharge measurement; EN 60332-1-2 for flame propagation; EN 60332-3-24 for fire propagation; and EN 50267-2-1 for corrosive gas or halogen measurement. Its burial guidance refers to CEI 11-17 Article 4.3.11. Specify project editions and acceptance tests with the exact RG7OZR or RG7H1OZR construction.

The final quotation and documentation should identify the ordered voltage, core-screen construction and armour earthing arrangement.

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