Tratos® 33kV cable – BS 7870 4.10

Product Description

Medium Voltage 33kV  cable, polymeric insulated, for use by distribution and generation utilities BS 7870-4.10.

Conductor – Stranded plain annealed copper (class 2), Stranded aluminium (class 2) or solid aluminium (class 1).
Conductor screen – Extruded layer of bonded semiconducting compound
Insulation – XLPE Type DIX 3 or EPR type DIE 5 conforming to the requirements given in BS 7870-1 annex B.
Insulation screen – Extruded layer of cold strippable semi-conducting compound  (bonded can be supplied on request)
Semi-conducting screens (conductor and insulation) and the insulation are applied by a continuous single pass triple extrusion.
Metallic screen – single layer of plain annealed copper wires.
Oversheath – Extruded layer of MDPE conforming to the requirements given in BS 7870-1 annex B for type DMP 5.
Colour – Black for 33 kV cables (other colours can be supplied on request)

Voltage rating Uo/U 19/33kv.

33 kV cables can be supplied as Single core or as 3 cores laid in a Triplex formation ( BS 7870-1 3.15)

Conductor sizes 

Aluminium conductor, 70mm, 95mm, 120mm, 150mm, 185mm, 240mm and 300mm.

Copper conductor, 70mm, 95mm, 120mm, 150mm, 185mm, 240mm, 300mm, 400mm, 500mm, 630mm, 800mm and 1000mm.

Application

Medium Voltage energy distribution cable for use by the Distribution Network Operators (DNO's) and Independent Distribution Network Operators (IDNO's) to connect to local substations or small generation units. MDPE sheathed cables are typically used for direct burial or burial in ducts, DMZ 4 sheathed cables are typically used where the contribution of cables to a fire hazard requires the use of cables with low smoke, zero halogen (LSZH) sheath.

Construction

Conductor: stranded circular compacted copper or aluminium
Conductor screen: semi-conducting layer
Insulation: HEPR or XLPE
Insulation screen: strippable (alternatively bonded) semi-conducting screen copper wire spiral screen
Outer sheath: HDPE sheathed
Standard colour: BLACK
Marking: TRATOS ELECTRIC CABLE 6.35/11 kV BS 7870-4.10 (Number of Cores and Size) + (Year of Manufacture) + Metre mark

Standards

 BS - British Standards Cables:
 BS 7870
Technical specifications
Conductor: Stranded plain annealed copper (class 2), Stranded aluminium (class 2) or solid aluminium (class 1)  to BS EN 60228
Insulation: XLPE type DIX 3 or EPR type DIE 5 to BS 7870-1, Annex B
Sheath: Type A cables MDPE type DMP 5 to BS 7870-1, Annex B.
Sheath: Type B cables LSZH type DMZ 4 to BS 7870-1, Annex B. 
Flame propagation on single cable (Type B cables only) BS EN 60332-1-2
Flame propagation on multiple cables (Type B cables only) BS EN IEC 60332-3-24
Smoke emission (Type B cables only) BS EN 61034
Corrosive and acid gas (Type B cables only) BS EN IEC 60754