N2XS(FL)2und Kabel

N2XS(FL)2Technische Daten des Y-Kabels

Recommended reference data. Values describe the stated 12/20 kV copper single-core construction, not guaranteed XWA dimensions, current ratings or manufacturing availability. Final manufacturing data and the project current-rating calculation govern the specification.

The first size is the phase-conductor area; the second is the metallic-screen area. Nominal PE sheath thickness in this reference is 2.5 mm. Diameter and mass are approximate.

Current-rating reference: one circuit in touching trefoil; screens solidly bonded; air 30°C without direct sun; ground 20°C, Vergrabungstiefe 0.7 M; Wärmewiderstand des Bodens 1.0 K·m/W wet and 2.5 K·m/W dry; no additional heat sources. Reference maximum conductor temperature: 90°C.

Two Barriers, Two Different Moisture Paths

The longitudinal blocking materials act in the screened-core region. If water enters through a local defect, swelling limits its travel along that region. This function does not close the defect, and it does not establish that the spaces between the copper conductor strands are also water blocked.

The laminated metal layer lies beneath the outer PE sheath. It provides a radial moisture barrier around the core, rather than mechanical armour. Its continuity and the way it is bonded into the sheath construction matter to that function. An ordinary PE-sheathed cable does not automatically have this laminated layer.

Barrier preparation at joints and terminations must follow the selected accessory design. A continuous factory cable length and a completed cable system are not the same moisture boundary: the accessories, sealed ends and any repaired sheath sections remain part of the system.

N2XS2Y, N2XS(F)2Y and N2XS(FL)2Y

These differences affect the cable build, accessory preparation and the required moisture-performance evidence. Matching voltage and copper area alone does not make the three designs interchangeable. The exact tape arrangement and barrier specification remain drawing-specific.

Screen Size and Accessory Fit

In 1×240/25, 240 mm² identifies the copper phase conductor and 25 mm² identifies the metallic screen. Increasing the phase size for load current does not by itself prove that the screen meets the earth-fault duty. Bildschirmbereich, fault duration and bonding belong to a separate part of the circuit design.

Insulation diameter controls the fit of stress-control components; complete cable diameter controls entry seals and other external interfaces. The selected 240/25 reference has an approximate overall diameter of 40 mm and mass of 3.303 kg/m. Those values describe this construction, not all cables sold under the same model name.

Three separate single-core cables form a three-phase circuit. Their physical arrangement and screen bonding influence losses and rating. The table uses solidly bonded screens in touching trefoil; a different layout needs its own calculation. MV screen-bonding arrangements are explained in the supporting technical article.

Fixed Distribution and Installation Limits

The model is used for fixed network connections, industrial feeders and substation circuits where a screened copper cable with both moisture-control features is specified. Underground and duct routes also depend on soil conditions, Drainage, mechanical protection and the installation design.

The reference construction has no steel-wire armour. A radial moisture barrier is not a substitute for impact protection, pulling limits or route protection. Its PE sheath must not be assumed to satisfy an indoor flame-retardant or low-smoke requirement merely because it is halogen free. Fire performance needs a separately declared design and evidence.

The applicable test schedule distinguishes conductor resistance, insulation and partial-discharge checks, oversheath integrity and longitudinal water-penetration performance. A standard citation is not a product certificate. Der official publication scope concerns fixed distribution cables; it does not establish mining, submarine or shipboard suitability for this model.