YJV22-0.6-1kV
YJV22 Armoured Cable — Steel Tape Armoured XLPE Power Cable 0.6/1 kV
Double galvanised steel tape under a PVC jacket: built to take the radial pressure of backfill and excavation tools, not the pull of a winch.
YJV22 takes the standard YJV construction and inserts two layers of galvanised steel tape between an extruded bedding and the oversheath. The tapes are applied in opposing helixes so each layer covers the gap of the other, giving continuous coverage without a hard spot that would print through the jacket. What that buys is crush resistance against vertical load: compacted backfill in a trench, a tyre rolling over a shallow route, or the point of a tool during third-party digging.
What it does not buy is tensile capacity. Pulling YJV22 relies on the conductor itself, so installation practice normally limits side-wall pressure and total pulling tension to figures well below those permitted for a wire-armoured build. Voltcore covers every armour layer with a minimum coverage check recorded per drum, and supplies armour cross-sectional area data so the designer can decide whether the tapes can serve as the circuit protective conductor on that particular route.
Specification
| Item | Value |
|---|---|
| Rated voltage U0/U (Um) | 0.6/1 (1.2) kV |
| Conductor | Class 2 stranded compacted copper, IEC 60228 |
| Core count | 1 (non-magnetic armour required), 2, 3, 4, 5, 3+1, 3+2, 4+1 |
| Cross-section range | 1.5 - 630 mm² |
| Insulation | Cross-linked polyethylene (XLPE) |
| Bedding | Extruded PVC or non-hygroscopic lapped tape depending on overall diameter |
| Armour type | Two layers of galvanised steel tape, counter-lapped, 0.2 mm to 0.8 mm per tape |
| Oversheath | PVC type ST1/ST2, black, UV stabilised |
| Max conductor temperature, continuous | 90 °C |
| Max conductor temperature, short circuit (5 s) | 250 °C |
| Minimum bending radius, multi-core armoured | 12 × overall diameter |
| Minimum installation temperature | 0 °C |
| Test voltage at 50 Hz | 3.5 kV, 5 min |
| Typical application standard references | GB/T 12706.1 Table 7 armoured constructions |
Layer-by-layer construction
Listed from the conductor outward. Read this alongside the specification table — the two together tell you whether the cable will survive its installation method.
- 1. ConductorAnnealed copper wires to IEC 60228 Class 2, compacted circular up to 35 mm² and shaped or sector options above
- 2. InsulationXLPE extruded directly over each conductor and cross-linked in steam, with colour-coded or numbered core identification
- 3. Laying-up and fillerCores stranded together with extruded polypropylene fillers to hold a round profile and maintain armour seating pressure
- 4. BeddingExtruded PVC inner covering or lapped non-hygroscopic tape, minimum 1.0 mm, isolating the cores from the metal layer
- 5. Steel tape armourTwo layers of galvanised steel tape applied counter-lapped with opposing lay so coverage stays continuous through bending
- 6. OversheathExtruded black PVC type ST1/ST2 with UV-stabilised carbon black, typically 1.8 mm and above depending on cable diameter
Reference dimensions and weights
| Nominal cross-section (mm²) | Conductor structure (no./mm) | Insulation thickness (mm) | Steel tape thickness (mm) | Approx. overall diameter (mm) | Approx. net weight (kg/km) |
|---|---|---|---|---|---|
| 4×4 | 7/0.85 | 0.7 | 0.2 | 18.8 | 600 |
| 4×6 | 7/1.04 | 0.7 | 0.2 | 20.1 | 745 |
| 4×10 | 7/1.35 | 0.7 | 0.2 | 22.8 | 1060 |
| 4×16 | 7/1.70 | 0.7 | 0.2 | 25.3 | 1420 |
| 4×25 | 7/2.14 | 0.9 | 0.2 | 28.5 | 1970 |
| 4×35 | 7/2.52 | 0.9 | 0.5 | 31.0 | 2490 |
| 4×50 | 19/1.78 | 1.0 | 0.5 | 34.2 | 3240 |
| 4×70 | 19/2.14 | 1.1 | 0.5 | 38.7 | 4340 |
| 4×95 | 19/2.52 | 1.1 | 0.5 | 43.8 | 5640 |
| 4×120 | 37/2.03 | 1.2 | 0.5 | 47.8 | 6920 |
Reference figures for preliminary sizing and drum planning. Overall diameter and weight vary with strand construction and sheath thickness tolerance; certified drawings are issued with each quotation.
Engineering characteristics
- Two counter-lapped galvanised steel tapes give roughly three times the radial crush resistance of an unarmoured sheath under standard plate-load testing.
- Minimum bending radius of 12 × overall diameter rather than 15 x, because the armour restrains the cores during a pull.
- Steel tape adds only 2-4 mm to overall diameter, so existing duct dimensions remain usable where a wire-armoured build would not fit.
- Armour may serve as the protective conductor where its DC resistance and fault-current capacity are verified for the specific route length.
- Extruded PVC bedding below 25 mm² prevents tape migration into the laid-up cores, a frequent cause of sheath deformation in cheaper constructions.
- 90 °C continuous and 250 °C / 5 s short-circuit conductor ratings retained with no derating versus unarmoured YJV.
- Galvanised tape to IEC 60502-1 with a minimum zinc coating mass checked per coil before armour application.
Typical applications
- Direct burial in open ground between buildings on industrial and utility sites
- Under-road and car park crossings where loads from above compress the route
- Trench runs feeding substations, pump stations and water treatment works
- External service routes from LV switchroom to remote plant skids
- Ducts and troughs under concrete slabs where future excavation could strike the cable
- Solar farm array cabling where the route crosses trafficked access tracks
Ordering options
- Steel tape armour with PE oversheath written YJV23 for higher moisture resistance
- Non-magnetic aluminium tape or stainless strap armour for single-core runs
- LSZH oversheath to IEC 60754-1 and IEC 61034-2 for tunnel and station routes
- Anti-termite and anti-rodent sheath additives for tropical installations
- Heavy-gauge 0.8 mm tape where radial load above standard is specified
Standards manufactured to
- IEC 60502-1
- GB/T 12706.1
- IEC 60228 (conductor)
- IEC 60332-1-2 (flame propagation of sheath)
- BS 6346 equivalent constructions available on request
- EN 50575 (CPR reaction to fire)
Manufactured to other standards on request. Send the standard number with your RFQ and we will quote against it rather than against a near-equivalent.
Price and availability for YJV22 Steel Tape Armoured XLPE Power Cable
Include cross-section, core count, voltage grade, route length and installation method — those five determine price more than anything else on the page.
- Engineer-reviewed before pricing
- Reference drawings issued with the quotation
- Free sample up to free sample up to 5 m
YJV22 Steel Tape Armoured XLPE Power Cable — frequently asked questions
When is YJV22 necessary and when is plain YJV enough?
Specify YJV22 whenever the cable leaves protected indoor space without a duct: burial, road crossings, industrial yards and external trenches. It resists the crush from backfill and excavation tools. Keep plain YJV inside buildings on tray, in conduit or in smooth duct, where nothing presses on the sheath and the smaller diameter and lower weight save money.
Can the steel tape armour be used as the earth conductor?
Sometimes, but prove it first. Armour cross-section is small relative to a dedicated core and its helical path gives higher DC resistance, often several ohm per kilometre on smaller sizes. We supply armour resistance and area data per size; compare it against the earth-fault loop impedance and disconnection time before relying on it.
Is YJV22 suitable for a vertical riser or a long shaft?
No. Radial strength and tensile strength are different properties. Over a long unsupported vertical drop, the conductor carries its own weight plus armour through the terminations and will creep. Use YJV32 with round steel wire armour, or fit intermediate cleats designed to transfer weight, which is standard practice in shafts above roughly 30 m.
What trench bedding do you recommend for buried YJV22?
A 100 mm compacted sand bed below the cable, 300 mm screened fill above, and marker tape at mid-depth above that. These steps cost far less than replacing a damaged route and address the failures armour alone cannot prevent. Where vehicles may cross, add a concrete tile or duct sleeve; the tape armour is mechanical insurance, not a structural element.
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