Company: Caledonian cables limited
Model Number: Medium Voltage Cables to BS 6622/BS7835
Country: China
Posted On: 06 Jul 2014
Contact Person: rose
Telephone: 86-21-62860355
Mobile Number: 86-0-
Product Description
Single Core Cables to BS 6622/BS7835 APPLICATIONS The single core cables are designed for distribution of electrical power with nominal voltage Uo/U ranging from 3.8/6.6KV to 19/33KV and frequency 50Hz. They are suitable for installation mostly in power supply stations, indoors and in cable ducts, outdoors, underground and in water as well as for installation on cable trays for industries, switchboards and power stations. STANDARD: BS 6622 BS 7835 (LSZH) CONSTRUCTION: Conductor:Plain annealed copper or aluminium complying with IEC 60228/BS 6360. Copper conductors shall be stranded (class 2) and aluminium conductors shall be either solid or stranded (class 2). Conductor Screen: Extruded layer of semi-conducting cross-linkable compound is applied over the conductor and shall cover the surface completely. The minimum thickness is 0.3mm and the maximum resistivity shall not exceed 500 Ohm-m at 90°C. Insulation: Insulation is of cross-linked polyethylene compound XLPE (GP8) conforming to BS 7655-1.3 or EPR (GP7), conforming to BS 7655-1.2. Table 1. Insulation Thickness Nom. Cross Section Area Insulation Thickness at Nominal Voltage 3.8/6.6KV (Um=7.2KV) 6.35/11KV (Um=12KV) 8.7/15KV(Um=17.5KV) 12.7/22KV(Um=24KV) 19/33KV(Um=36KV) mm2 mm mm mm mm mm 70 – 185 2.5 3.4 4.5 5.5 8.0 240 2.6 3.4 4.5 5.5 8.0 300 2.8 3.4 4.5 5.5 8.0 400 3.0 3.4 4.5 5.5 8.0 Above 500 3.2 3.4 4.5 5.5 8.0 Insulaton Screen: Extruded layer of semi-conducting cross-linkable compound is applied over the insulation. The extruded semi-conducting layer shall consist of bonded or cold strippable semi conducting compound capable of removal for jointing or terminating. As an option, a semi conducting tape may be applied over the extruded semi conducting layer as a bedding for the metallic layer. The minimum thickness is 0.3 mm and the maximum resistivity is 500 Ohm-m at 90°C. The screen is tightly fitted to the insulation to exclude all air voids and can be easily hand stripped on site. Metallic Layer: The metallic layer shall consist of either copper tapes or a concentric layer of copper wires or a combination of tapes and wires. The metallic layer provides an earth fault current path, capable of withstanding fault current to earth of 1000A for one second at maximum temperature 160°C. Copper wires are applied over the conducting water blocking layer with a minimum diameter of 0.5mm. And over the copper wires, copper tape with minimum thickness of 0.1mm can be applied helically with overlap. Total cross section of copper wire screen layer is shown in table 2. Table 2. Minimum Total Cross Section of Copper Wire Screen & DC Resistance of the screen Nominal Cross-Section of Cables Minimum Cross-Section of Copper Wire Screen DC Resistance of the Copper Wire Screen at 20°C mm2 mm2 O up to 120 16 1.06 150-300 25 0.72 400-630 35 0.51 Separation Sheath (for armoured cable): The separation sheath comprises a layer of extruded PVC, PE or LSZH. The nominal thickness is calculated by 0.02Du + 0.6mm where Du is the fictitious diameter under the sheath in mm. The nominal separation sheath thickness shall not be less than 1.2mm. Armour (for armoured cable): The armour consists of round aluminium wire with diameter specified as in Table 3. Table 3. Armour Wire Diameter Fictitious Diameter Under the Armour Armour Wire Diameter mm mm > < 25 1.6 25 35 2.0 35 60 2.5 60 - 3.15 Over Sheath: Overall sheath comprises a layer of extruded either PVC type 9 conforming to BS 7665-4.2 or MDPE type TS2 conforming to BS 7655-10.1. LSZH can be offered as an option. The oversheath is normally black in colour. When a DC voltage test is to be performed on the oversheath, a semi conducting layer such as graphite coating shall be applied over the surface of the extruded oversheath. The nominal oversheath thickness is calculated by 0.035+D where D is the diameter immediately under the oversheath in mm. For cables with the oversheath not applied over the armour, the nominal oversheath thickness shall not be less than 1.4mm. And for cables with oversheath applied over the armour, the nominal oversheath thickness shall not be less than 1.8mm. PHYSICAL PROPERTIES: Operating Temperature: up to 90°C Temperature Range: -5°C ( PVC sheath ); -20°C ( PE sheath ) Short Circuit Temperature: 250°C (short circuit duration up to 5 seconds) Bending Radius: 12 x OD Table 4. Nominal /Operating /Test Voltages: Rated Voltage Uo/U Operating Voltage (Um) Testing Voltage (rms) 3.8/6.6KV 7.2KV 15KV 6.35/11KV 12KV 25.5KV 8.7/15KV 17.5KV 35KV 12.7/22KV 24KV 51KV 19/33KV 36KV 76KV Three Core Cables to BS 6622/BS7835 APPLICATIONS The three core cables are designed for distribution of electrical power with nominal voltage Uo/U ranging from 3.6/6.6KV to 19/33KV and frequency 50Hz. They are suitable for installation mostly in power supply stations, indoors and in cable ducts, outdoors, underground and in water as well as for installation on cable trays for industries, switchboards and power stations. STANDARD: BS 6622 /BS7835 Three Core Cables to BS 6622 Three Core Cables to BS 6622 CONSTRUCTION: Conductor: Plain annealed copper or aluminium complying with IEC 60228/BS 6360. Copper conductors shall be stranded (class 2) and aluminium conductors shall be either solid or stranded (class 2). Conductor Screen: Extruded layer of semi-conducting cross-linkable compound is applied over the conductor and shall cover the surface completely. The minimum thickness is 0.3mm and the maximum resistivity shall not exceed 500 Ohm-m at 90°C. Insulation: Insulation is of cross-linked polyethylene compound XLPE (GP8) conforming to BS 7655-1.3 or EPR (GP7), conforming to BS 7655-1.2. Table 1. Insulation Thickness Nom. Cross Section Area Insulation Thickness at Nom. Voltage 3.8/6.6KV(Um=7.2KV) 6.35/11KV(Um=12KV) 8.7/15KV(Um=17.5KV) 12.7/22KV(Um=24KV) 19/33KV(Um=36KV) mm2 mm mm mm mm mm 70 – 185 2.5 3.4 4.5 5.5 8.0 240 2.6 3.4 4.5 5.5 8.0 300 2.8 3.4 4.5 5.5 8.0 400 3.0 3.4 4.5 5.5 8.0 Above 500 3.2 3.4 4.5 5.5 8.0 Insulaton Screen: Extruded layer of semi-conducting cross-linkable compound is applied over the insulation. The extruded semi-conducting layer shall consist of bonded or cold strippable semi-conducting compound capable of removal for jointing or terminating. As an option, a semi conducting tape may be applied over the extruded semi conducting layer as a bedding for the metallic layer. The minimum thickness is 0.3 mm and the maximum resistivity is 500 Ohm-m at 90°C. The screen is tightly fitted to the insulation to exclude all air voids and can be easily hand stripped on site Inner Covering & Fillers: For cables with a collective metallic layer or cables with a metallic layer over each individual cores with additional collective metallic layers, semi conducting inner covering and fillers shall be applied over the laid up cores. The inner covering is made of non hygroscopic material, except if the cable is to be made longitudinally watertight. The inner covering shall be extruded or lapped. The approximate thickness of extruded inner coverings is given in Table 2: Table 2. Approximate thickness of extruded inner coverings Ficititous Diameter Over Laid Up Cores Approx. Thickress of Extruded Inner Covering mm mm > < 35 45 1.0 25 35 1.2 35 45 1.4 45 60 1.6 60 80 1.8 80 - 2.0 *The approximate thickness of lapped inner coverings shall be 0.6mm. Metallic Layer: The metallic layer shall be applied over each core or applied as a collective screen. The metallic screen shall consist of either copper tapes or a concentric layer of copper wires or a combination of tapes and wires. The metallic layer provides an earth fault current path, capable of withstanding fault current to earth of 1000A for one second at maximum temperature 160°C. Copper wires are applied over the conducting water blocking layer with a minimum diameter of 0.5mm. And over the copper wires, copper tape with minimum thickness of 0.1mm can be applied helically with overlap. Total cross section of copper wire screen is shown in table 3. Table 3. Minimum Total Cross Section of Copper Wire Screen & DC Resistance of the screen Nominal Cross-Section Area of Cable Minimum Cross-Section of Copper Wire Screen Area DC Resistance of the Copper Wire Screen mm2 mm2 mm up to 120 16 1.06 150-300 25 0.72 400-630 35 0.51 Separation Sheath (for armoured cable): The separation sheath comprises a layer of extruded PVC, PE or LSZH. The nominal thickness is calculated by 0.02Du + 0.6mm where Du is the fictitious diameter under the sheath in mm. The nominal separation sheath thickness shall not be less than 1.2mm. Armour (for armoured cable): The armour consists of galvanized steel wire applied over the inner covering with diameter specified as in Table 4. Table 4. Armour Wire Diameter Fictitiious Diameter Under the Armour Armour Wire Diameter mm mm > < 25 1.6 25 35 2.0 35 60 2.5 60 - 3.15 Over Sheath: Overall sheath comprises a layer of extruded either PVC type 9 conforming to BS 7665-4.2 or MDPE type TS2 conforming to BS 7655-10.1; LSZH can be offered as an option. The oversheath is normally black in colour. When a DC voltage test is to be performed on the oversheath, a semi conducting layer such as graphite coating shall be applied over the surface of the extruded oversheath. The nominal oversheath thickness is calculated by 0.035+D where D is the diameter immediately under the oversheath in mm. For cables with the oversheath not applied over the armour, the nominal oversheath thickness shall not be less than 1.4mm. And for cables with oversheath applied over the armour, the nominal oversheath thickness shall not be less than 1.8mm. PHYSICAL PROPERTIES: Operating Temperature: up to 90°C Temperature Range: -5°C ( PVC sheath ); -20°C ( PE sheath ) Short Circuit Temperature: 250°C (short circuit duration up to 5 seconds) Bending Radius: 15 x OD Table 5. Nominal /Operating /Test Voltages: Rated Voltage Uo/U Operating Voltage (Um) Testing Voltage (rms) 3.8/6.6KV 7.2KV 15KV 6.35/11KV 12KV 25.5KV 8.7/15KV 17.5KV 35KV 12.7/22KV 24KV 51KV 19/33KV 36KV 76KV
Product Specifications
Medium Voltage Cables to BS 6622/BS7835 Single Core Cables To BS 6622/BS7835 Three Core Cables To BS 6622/BS7835
Location: uk
Quantity Available: 9999
Minimum Order: 999
Price for Minimum Order: 9
Packaging: wood box
Payment Options: tt
Related Categories: Telecommunications , Telecommunication
Contact Person: rose
Company: Caledonian cables limited
Address: shanghai, Acheng, , China
Zip/Postal:
Telephone: 86-21-62860355
Fax: 86-0-
Mobile Number: 86-0-

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