Medium voltage NA2XSEBY cables for distribution networks. They are suitable for laying indoor, tunnel, cables trench and underground. It is able to bear external mechanical forces, but unable to bear heavy pulling force, it widely used in transformer stations, electric power plants and industrial plants.

Construction

Conductor: Aluminum, class 2, circular compacted conductors
Conductor screen: Non-metallic, semi-conducting compound
Insulation: Cross-linked polyethylene (XLPE)
Insulation screen: Non-metallic, semi-conducting compound
Metallic screen: Copper wire
Filler: Non-hygroscopic material
Inner sheath: Polyvinyl chloride (PVC)
Armour: Steel tape
Outer sheath: Polyvinyl chloride (PVC)

Main Characteristics

Good electrical and mechanical properties.
Minimal dielectric loss, high insulation resistance.

Specification

IEC 60228 Conductors of Insulated Cables
IEC 60502-2 Power Cables with Extruded Insulation and Their Accessories for Rated Voltages from 1kV (Um=1.2KV) up to 30kV (Um=36kV) – Part 2: Cables for Rated Voltages of 6kV (Um=7.2KV) up to 30kV (Um=36kV).

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No.of Cores and Nominal Cross Section	Nominal Insulation Thickness	Nominal Steel Tape Thickness	Nominal Sheath Thickness	Approx. Overall Diameter	Approx.Weight		Max.D.C.Resistance of Conductor at 20℃
No.of Cores and Nominal Cross Section	Nominal Insulation Thickness	Nominal Steel Tape Thickness	Nominal Sheath Thickness	Approx. Overall Diameter	Cu	Al	Cu	Al
mm²	mm	mm	mm	mm	kg/km	kg/km	Ω/km	Ω/km
3×35	5.5	0.5	2.8	61.3	4629	3991	0.524	0.868
3×50	5.5	0.5	2.9	64.1	5202	4338	0.387	0.641
3×70	5.5	0.5	3	68.2	6110	4861	0.268	0.443
3×95	5.5	0.5	3.2	72.4	7183	5452	0.193	0.32
3×120	5.5	0.5	3.3	75.4	8157	5967	0.153	0.253
3×150	5.5	0.5	3.4	79.1	9505	6799	0.124	0.206
3×185	5.5	0.5	3.5	83.0	10848	7439	0.0991	0.164
3×240	5.5	0.8	3.7	89.7	13726	9303	0.0754	0.125
3×300	5.5	0.8	3.9	95.1	16061	10517	0.0601	0.100
3×400	5.5	0.8	4.1	101.5	19374	12230	0.047	0.0778
3×500	5.5	0.8	4.3	109.8	23271	14204	0.0366	0.0605
3×630	5.5	0.8	4.6	118.6	28080	16307	0.0283	0.0469

Application and case display

FAQ

What is the application of Armored vs. Unarmored Cables?

What is the length tolerance for cables?

Armored vs. Unarmored Cables?

What are the weight limits for different types of packages?

Why do cable prices vary significantly among suppliers within the same region?

Flame Retardant Cables VS Fire Resistant Cables?

Both types of cables are crucial in enhancing the likelihood of escape and survival in the event of a fire and are often confused with one another. However, there is a fundamental distinction between flame retardant cables and fire resistant cables. Flame retardant cables are engineered to inhibit the spread of fire to adjacent areas. On the other hand, fire resistant cables are specifically designed to preserve circuit integrity and ensure functionality during a fire, under specified conditions, aiding both evacuees and firefighters.

Longitudinal Water Blocking vs. Lateral Water Blocking?

A longitudinally water blocking cable is designed with a barrier to prevent the spread of moisture along its length. Longitudinal water blocking stops water from migrating along the cable's core, typically between the conductor strands, insulation layers, or metallic screens. Lateral water blocking ensures that water cannot penetrate the cable in the event that the sheathing is pierced or damaged. Radial water blocking prevents water from penetrating the cable's outer sheath or insulation layers, thereby stopping it from entering the cable structure entirely. Longitudinal water blocking can be achieved through various methods, including the application of water-blocking tapes and powders. These are frequently located on either side of a metallic screen and conductor. Lateral water blocking is typically accomplished by applying a layer of aluminum/polyester tape to the underside of the outer sheath.

What is the application of Armored vs. Unarmored Cables?

Armored cables are suitable for use in hazardous environments, such as underground installations, areas with high moisture levels, and areas prone to mechanical damage. Unarmored cables are suitable for less demanding applications, such as inside walls or other protected locations.

What is the length tolerance for cables?

The tolerance for the power cable is 0 to +0.5%. For the bare conductor, the tolerance is ±5%.

How do you calculate the minimum bending radius of cables?

The bend radius refers to the curved shape in which an electrical cable can be bent or curved without sustaining damage. To determine the minimum bend radius for cables, apply the following formula: Minimum Bend Radius = Cable Outer Diameter×Cable Multiplier. For example, if the outer diameter of a cable is 20mm, its minimum bending radius would be 20mm×6 = 120mm. Conversely, if an armored cable has an outer diameter of 30mm, its minimum bending radius would be 30mm×12 = 360mm.