Medium Voltage Power Cables Catalogue - AEC Online

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Where; P : Sidewall pressure in N/m (lbf/ft) T o : Tension leaving the bend in N (lbf) r : Inside radius of conduit in m (ft) The normal maximum sidewall pressure per meter (feet) of radius is as given below. However, in order to minimize cable damage because of excessive sidewall pressure, the installer should check the proper recommendations for each type of cables to be installed. Cable Type Maximum sidewall pressure ( N/m ) ( lbf/ft ) 6 to 15 kV <strong>Power</strong> cables 20 and 30 kV <strong>Power</strong> cables Armoured cables (all voltage grades) 7300 4400 4400 500 300 300 B.7 Laying methods The best method of laying a cable depends on the type of cable and working conditions. The following are generally applied as the most common cable laying methods: B.7.1 Direct in the ground This method is shown in the figure below, and is employed in following cases; 1. Where road is narrow so the construction of conduit under the road is not permitted. 2. Where the number of cables is few and no future increase is expected. 3. Where the road digging is easy. B.7.2 Underground tunnels or ducts This method is shown in the figures below, and is employed in following cases; 1. It is the main underground transmission line where the number of cables is many or expected to be increased in near future. 2. Where there is hard pavement or where hard pavement will be constructed in future. 3. Where digging is difficult due to heavy traffic.
Annex B: Recommendations telephone tension meter caterpillar cable drum operator pulling wire pulling eye roller or caterpillar power cable for caterpillar trough, if necessary telephone cable drum control panel caterpillar operator Manhole Manhole cable Tunnel roller or caterpillar pulling eye pulling wire power cable for caterpillar telephone control panel caterpillar cable drum winch car operator Manhole cable Duct Manhole tension meter pulling eye pulling wire 141
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Medium Voltage Power Cables
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INDEX....... Medium Voltage Cables
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General Information Selecting a Pow
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Introduction to XLPE Insulated Cabl
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Introduction to XLPE Insulated Cabl
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Design of Medium Voltage Cables The
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Construction of Medium Voltage Cabl
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Construction of Medium Voltage Cabl
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Single-Core Cables, with Copper Con
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Three-Core Cables, with Copper Cond
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Single-Core Cables, with Aluminum C
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Three-Core Cables, with Aluminum Co
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Page 93 and 94: Single-Core Cables, with Copper Con
Page 95 and 96: Three-Core Cables, with Copper Cond
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Page 137 and 138: Cables For Special Applications Lea
Page 139 and 140: Annex A: Continuous Current Ratings
Page 141 and 142: Annex A: Continuous Current Ratings
Page 143: Annex B: Recommendations B.4.1 Pull
Page 147 and 148: Annex D: Formulas D.1 Resistance Th
Page 149 and 150: Annex E: Derating Factors Table E.1
Page 155 and 156: Annex E: Derating Factors Cables on
Page 157 and 158: Annex E: Derating Factors Cables on
Page 159 and 160: Annex F: Short Circuit Current Tabl
Page 161 and 162: Annex H: Coding Key 1 2 3 4 5 6 7 8
Page 163 and 164: Annex J: Conversion Table Multiply
Page 165 and 166: Product Range manufactures a wide r
Page 167: Contact us markets and sells over 8
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Medium Voltage Power Cables Catalogue - AEC Online

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