Mining XLPE Power Cable

Lowest Cost in the Family

No armor steel, no inner sheath, less PVC compound — MYJV runs roughly 20 to 35 percent cheaper than MYJV22 of equivalent cross-section, and 35 to 50 percent cheaper than MYJV32. For inside-substation racks and conduit pulls measured in tens or hundreds of meters, the savings are material.

Smaller OD, Easier Conduit Pulls

Without the armor and inner sheath, MYJV has roughly 8 to 12 percent smaller OD than MYJV22. That matters when pulling through conduit — the standard conduit fill rule (40 percent for three or more cables) is easier to satisfy, and the pulling tension stays well under the cable’s mechanical limit even on long runs.

Identical XLPE Electrical Performance

Same conductor stranding, same insulation, same 90°C continuous / 250°C short-circuit rating, same dielectric strength as MYJV22 / MYJV32. The current-carrying capacity and voltage drop characteristics are essentially identical — the only thing missing is the steel armor layer.

Shortest Lead Time in the Family

No armoring line scheduling, no extra inner sheath extrusion pass. Standard 0.6/1 kV configurations ship in 12 to 20 days — about a week faster than MYJV22, two weeks faster than MYJV32. Useful when project cable lists arrive late and the substation commissioning date won’t move.

Full Voltage Range, 0.6/1 kV to 8.7/15 kV

Same family voltage coverage as the armored variants. Cores from 1 to 5; cross-sections 1.5 to 400 mm². Single-core MYJV is also available in 500 / 630 / 800 mm² for high-current substation tie cables that would be impractical to make as armored multi-core.

Flame-Retardant and LSZH Variants Available

MYJV-ZR adds flame-retardant compounding to pass GB/T 19666 / IEC 60332-3 Category A — the most commonly specified variant for confined cable galleries shared with other circuits. MYJV-WDZ uses an LSZH sheath for personnel-occupied switch rooms and control rooms. Both are quoted alongside the standard product.

For conduit installations, confirm the conduit is sized for the cable OD — standard rule is 40 percent fill for three or more cables, 31 percent for two, 53 percent for one. Pulling MYJV through a conduit that’s too tight can damage the outer sheath even though the cable seems to fit. If in doubt, go up one conduit size.

Unarmored cable cannot be pulled by the conductors — use a basket grip or pulling sock that distributes the load across the sheath. Maximum pulling tension is roughly 40 N/mm² of total conductor cross-section. For long conduit pulls, use cable lubricant and confirm tension stays below the limit, especially at bends.

XLPE absorbs moisture if left exposed at cut ends. Reseal with heat-shrink caps within minutes of cutting, and check that the factory end-cap is intact on arrival. Wet insulation will pass first commissioning but degrade fast in service. Especially critical because MYJV has no armor or inner sheath to slow moisture ingress along the cable from a damaged end.

Because MYJV has no armor, the cable provides no integral earth path. The PE conductor must be built into the cable as a 3+1 or 3+2 core configuration, or installed as a separate parallel earth cable. Decide which at the design stage and reflect it in the cable schedule — do not improvise on-site by adapting the neutral.

Standard compression glands (BW, A2, CW types) work for MYJV — no armor termination kit needed, which speeds up the gland-up significantly compared to MYJV22 or MYJV32. For 6/10 kV and above, still use cold-shrink or heat-shrink termination kits matched to the cable voltage class for the stress relief over the XLPE.

For MV cable, run insulation resistance (5 kV megger, 1 minute) and AC voltage withstand test per IEC 60502-2 commissioning values. Routine factory test passing is not a substitute for commissioning — mechanical damage during pull or termination only shows up under voltage stress, and finding it after the cable is energized inside a busy substation is exactly the kind of fault you want to avoid.