33kv PVC/XLPE/PE Insulated PVC Sheatd Aluminum Copper Underground Armoured Medium Voltage Power Cable
1 Application:
It is used to transmit and distribute power in power transmission and distribution systems of 35kV or lower. It is generally applied to the fields including power, construction, mines, metallurgy, petrochemical industry and communication in complete replace of oil immersed paper insulated power cable and in partial replace of PVC insulated power cable. Power cables for power networks, underground, outdoors and in cable ducting.
Standard: BS6622, BS EN/IEC 60228,IEC60502.2
Conductor: Class 2 stranded plain copper conductor to BS EN 60228:2005 (previously BS6360)
Conductor screen: Semiconducting material
Insulation: XLPE (Cross-Linked Polyethylene) Type GP8 to BS7655
Insulation Screen: Semi-conducting material
Metallic Screen: Individual and overall copper tape screen to BS6622
Filler: PET (Polyethylene Terephthalate) fibers
Separator: Binding tape
Bedding: PVC (Polyvinyl Chloride) Type TM1 to BS7655
Armoring:
Single Core: Aluminium Wire Armoured (AWA)
MultiCore: Steel Wire Armoured (SWA)
Sheath: PVC (Polyvinyl Chloride) Type TM1 to BS7655
Colour: Red or Black
2. Using features
1. Rated voltage: Uo/U:3.6/6kV, 6/10kV(11kV), 12/20kV(24kV), 19/33kV, 26/35kV(35kV).
2. No. of core: Single-core or three cores.
3. The highest allowed operating temperature of conductor for long-term working is 90oC. In short-circuit (Max. long-term is no more than 5 seconds). The highest temperature for a conductor is no more than 250ºC.
4. D.C. resistance of the conductor complies with the stipulations of 3.6/6kV, 6/10kV(11kV), 12/20kV(24kV), 19/33kV, 26/35kV(35kV).
5. The environment temperature should be no lower than 0oC when lay. Otherwise, it should be preheated.
6. The cable is laid without a horizontal drop limit.
7. Working Frequency Voltage Test: 3.5Uo/5min without puncture.
8. Partial Discharge Test: The discharge volume should be no more than 10pC under 1.73Uo for the cable.
9. Minimum Bending Radius: Single core - Fixed: 15 x overall diameter;3 core - Fixed: 12 x overall diameter
(Single core 12 x overall diameter and 3 core 10 x overall diameter where bands are positioned adjacent to joint or terminations provided that the bending is carefully controlled by the use of a former)
Note: The single-core armored cables are used for the D.C. system only. If used for the A.C. system, the magnetic isolation should be applied to the steel armor wires of non-magnetical materials that should be used.
Insulation: The cable has three layers of insulation. The first layer is made of Polyvinyl Chloride (PVC), which provides electrical insulation. The second layer can be either Cross-Linked Polyethylene (XLPE) or PE (Polyethylene). Both materials offer excellent electrical insulation properties and are commonly used in medium voltage cables.
Conductor: The cable can have either aluminum or copper conductors. Both aluminum and copper are good conductors of electricity, with copper being more conductive but also more expensive than aluminum.
Armored: The cable is armored, which means it has a layer of armor for mechanical protection. The armor is typically made of steel wires or steel tapes. It provides additional strength to the cable, making it suitable for underground installations where it may encounter mechanical stresses.
Sheath: The cable has a PVC (Polyvinyl Chloride) sheath, which is an outer protective layer. The sheath provides insulation and protects the cable from moisture, chemicals, and other environmental Voltage Rating: The cable is designed to operate at a voltage rating of 33 kilovolts (33kV). This indicates the maximum voltage level the cable can safely handle.
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