2. Table: Cable Grouping Factor (No of Tray Factor), K2 = 0.68 (for 3 trays having 9 cable each), Let’s select 1.1 KV, 3 core, 240 Sq.mm, Aluminum, XLPE, Armored cable for single run, Technical Details For 1.1 KV, 3 Core, Aluminum/Copper Conductor, XLPE Insulated, Armored Cables, Current capacity of 240 Sq.mm XLPE Armored aluminum cable in Air is 402 Amp, Total derating current of 240 Sq.mm Cable = 402×0.5984 = 240.55 Amp, Resistance = 0.162 Ω / Km and Reactance = 0.072 Ω / Km, Voltage drop, V2 = 0.3 Volts/Km/Amp    (as per Havell’s brochure), Terminal voltage at Motor, V2 = 415 -13 = 402 V, To decide 240 Sq.mm cable, cable selection condition should be checked, Related Post: Servo Motor – Types, Construction, Working, Controlling & Applications. Thanks for correction. For a single-phase generator, the full load current is calculated as: I = 1000 × S / V.Try it with this calculator.. Voltage drop in one km with one amp load current. system, I, Cable Grouping Factor (No of Tray Factor), K, Total derating current of 300 Sq.mm Cable = 450×0.5984 =. Transformer Full Load Current Calculator: Enter the voltage, kVA rating then press the calculate button. Let’s select 6.6 KV, 3 core, 300 Sq.mm, Aluminum, XLPE, Armored cable for single run, Cable Grouping Factor (No of Tray Factor), K2 = 0.68 (for 3 trays having 9 cable each), Total derating factor = K1 x K2   = 0.88 x 0.68 = 0.5984, Current capacity of 300 Sq.mm XLPE Armored aluminum cable in Air is 450 Amp, Total derating current of 300 Sq.mm Cable = 450×0.5984 = 269.28 Amp, Voltage drop = 0.26 Volts / Km / Amp    (as per Havell’s brochure), Terminal voltage at Motor, V2 = 6600 – 2.132 = 6597.868 V, To decide 300 Sq.mm cable, cable selection condition should be checked. Follow these preventive maintenance tips to keep the water, and the good times, flowing, In circulation: the last thing a commercial pool operator wants is downtime. For a three-phase generator, the full load current is calculated as I = 1000 × S / (√3 × V).Where, S is the generator rating in kilo-volt-ampere (kVA), and V is the generator rated voltage in volt (V). The cost of labor for laying of higher size cable will also be higher compared to respective lower size cable. Step by Step Procedure with Calculation & Diagrams. lugs, glands, jointing kit (in case any fault occur in the future) and oversized cable tray. & instead of 217 Amp it should be 230 Amp. while keep in mind that LT motors need more current than HT motors. Up tp 93% Off - Launching Official Electrical Technology Store - Shop Now! The current rating given for the cables is defined for ambient temp of 40* C. If the ambient temp is greater than that, cable current carrying capacity derates. Hence nearest higher size 300 sq mm is required. Before we go in details, let’s clear the main difference between LT & HT Motors. Considering all these vital points it’s important to make an, Now we have to discuss the main topic that’s, Load Current = P / (1.732 x V x Pf x Eff)       —>     (P =, Estimated Voltage Drops in PVC/XLPE Aluminum Cables For A.C. System, Cable derating Amp (240.55 Amp)is higher than full load current of load (230 Amp) = OK, Cable voltage Drop (3.13%)is less than defined voltage drop (10%) = OK, Cable short circuit capacity (22.56 KA) is higher than system short circuit capacity at that point ( X KA) = OK, Suppose Short circuit level/Fault level for H.T. Voltage drop, V2 = 0.3 Volts/Km/Amp (as per Havell’s brochure) = 0.3x217x200/1000 = 13 V I thinks this is wrong, because sysatem voltage is 415v not 217v, So: V2=0.3x415x200/1000 = 24.9v Is that true Sir? Determine the minimum size of cable with the reference to IEER 2. Full load current definition: A full load current is the largest current that a motor or other device is designed to... | Meaning, pronunciation, translations and examples An undersized cable can burn during motor operation causing risk to human life, machine, infrastructure, loss of production and replacement cost. Technical Details For 6.6 KV, 3 Core, Aluminum/Copper Conductor, XLPE Insulated, Armored Cables.

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