YJV YJV22 4 Core 300mm 180mm Xlpe Armoured Copper Power Cable Wire

Product Features

Hybrid Large Cross-Section Design:The main core uses 3×300mm² copper conductors, and the neutral conductor is 180mm² (or 185mm²), meeting the requirements of high-load three-phase power distribution. Suitable for incoming lines in large industrial equipment, substations, and power distribution rooms.

XLPE Insulation High Temperature Resistance:Cross-linked polyethylene insulation allows for a long-term conductor operating temperature of 90°C and a short-circuit withstand temperature of up to 250°C (5 seconds), increasing the current carrying capacity by 20–30% compared to PVC insulated cables.

Steel Tape Armor (YJV22):Double-layer galvanized steel tape armor provides pressure resistance, impact resistance, and rodent protection, allowing for direct underground burial without additional conduit. The unarmored version (YJV) is suitable for cable trays or conduits.

Low-loss copper conductor: Utilizes IEC 60228 Class 2 stranded annealed copper conductors, with a 300mm² DC resistance ≤0.0601Ω/km (20°C), ensuring low voltage drop and high energy efficiency for long-distance power transmission.

Flame-retardant PVC outer sheath: Black ST2 type PVC sheath, passing the IEC 60332-1-2 single-strand vertical burning test, with added carbon black for UV resistance, suitable for outdoor or humid environments.

Dual-model compatibility: Both YJV (unarmored) and YJV22 (steel-belt armored) have the same structure, allowing for flexible selection to meet different mechanical protection requirements.

Product Specifications

Application Areas

YJV/YJV22 4-core 300mm² + 180mm² large-section armored cable is mainly used in the following scenarios:

1. Factory main substation to workshop distribution room: As the main incoming cable, it carries thousands of amperes of current, powering heavy equipment such as large presses, furnaces, and compressors. The armored version can be directly buried across factory roads, avoiding the need for cable trenches.

2. Main incoming line for commercial complexes and high-rise buildings: Leading from an outdoor box-type transformer to the basement distribution cabinet, the 4-core structure (three live and one neutral) meets the requirements of a three-phase four-wire power supply. The YJV22 armor can withstand mechanical impacts during construction and is rodent-proof.

3. Tunnels, subways, and integrated utility tunnels: Used for the main circuit of power lighting in tunnel sections. The armor layer resists rock fragments and impacts during installation. The 180mm² neutral wire can balance single-phase loads, suitable for station lighting and air conditioning systems.

4. Mining and Heavy Industry Environments: In open-pit mine crushing stations, ore dressing plants, and similar locations, cables are often exposed to the risk of falling gravel and ore. Steel-belt armor provides reliable physical protection, and the 300mm² copper core meets the power supply requirements for high-power crushers and conveyor belt motors.

5. Photovoltaic Power Stations and Wind Farm Substations: In ground-mounted photovoltaic power stations, this refers to the AC collector lines from the inverter room to the step-up transformer. When directly buried, the armor prevents small animals from chewing on the cables, while the 4-core structure accommodates three-phase output on the low-voltage side.

6. Temporary Large-Scale Construction Power Supply: During the construction of stadiums and convention centers, this refers to the power supply from the main distribution box to tower crane groups and concrete mixing plants. The armor withstands the pressure of on-site vehicles, and the 300mm² cross-section supports the simultaneous operation of multiple large pieces of equipment.

 FAQ

Q1: What is the difference between YJV and YJV22? How to choose?

YJV is unarmored and suitable for environments requiring additional mechanical protection, such as cable trays, conduits, and shafts. YJV22 is steel-tape armored and can be directly buried, installed outdoors, or used in locations susceptible to mechanical damage. For 300mm² large-section cables, YJV22 is recommended for most projects to improve durability.

Q2: Why is the neutral conductor 180mm² instead of 300mm²?

In a balanced three-phase system, the neutral conductor only carries unbalanced current and harmonic current, and usually does not need to have the same cross-section as the phase conductors. Using 180mm² (or 185mm²) reduces cable weight and cost while meeting standard requirements.

Q3: Is 555A current carrying capacity for a 300mm² copper core a long-term permissible value?

Yes, this refers to the continuous current carrying capacity under ambient temperature of 30°C, air-laid conditions, and conductor temperature of 90°C. Actual engineering projects require correction according to IEC 60364-5-52 based on factors such as laying method (cable tray, conduit, direct burial), ambient temperature, and multiple parallel cables.

Q4: What is the minimum bending radius?

For armored (YJV22) versions, the minimum bending radius is 12 × cable outer diameter for fixed installation and 15 × cable outer diameter for traction laying. For example, with an outer diameter of 70mm, the fixed bending radius is ≥840mm.

Q5: Can it be buried directly? Is conduit required?

YJV22 can be buried directly. Dig a trench 700–800mm deep, lay 100mm of fine sand at the bottom, lay the cable, cover with another 100mm of fine sand, add warning tape, and then backfill. No additional conduit is required. Unarmored YJV cables must be run through conduits or placed in cable trays.

Q6: Are flame-retardant (ZR) or low-smoke halogen-free (LSZH) versions available?

Customization is possible. The standard outer sheath is flame-retardant PVC (ZR-YJV22), passing the IEC 60332-3-22 bundled burning test. For low-smoke halogen-free (LSZH) versions, please specify model WDZA-YJY23, suitable for densely populated areas such as subways and hospitals.