A Furnished House Has The Following 220 V Appliances A Fridge Of 500 Va 0 8 Lagging Pf Lights Of 500 Va 0 9 Lagging P 1 (85.71 KiB) Viewed 12 times
A Furnished House Has The Following 220 V Appliances A Fridge Of 500 Va 0 8 Lagging Pf Lights Of 500 Va 0 9 Lagging P 2 (69.22 KiB) Viewed 12 times
A furnished house has the following 220 V appliances: A fridge of 500 VA, 0.8 lagging pf Lights of 500 VA, 0.9 lagging pf A washing machine of 2 kVA, 0.85 lagging pf. A heater of 3 KW, upf. An air conditioning unit of 3 kVA, 0.75 lagging pf. Electronic appliances of a maximum of 1 kVA. (Assume a suitable power factor) The nearest electrical main distribution panel (MDP) is 200 m away from the load distribution panel (LDP) of the house. The 220 V LDB is supplied from the MDP through a single-phase transformer 2200/220 V and a cable of (210+2xSeN) meters (where 2xSeN meters are included for installation curvatures; SeN is your project group number). The data of the transformer and cable are given below. Transformer A single-phase 2200/220 transformer has a core resistance of 48,400 2, magnetization reactance of 8,940 + 10*SN 2 (SN is your last three digits of one group-member ID number), primary winding resistance of 5.2 S2, primary leakage reactance of 15.65 52 secondary winding resistance of 0.052 52, and secondary leakage reactance of 0.1565 $2. LV Cable The LV cable is rated at 3 kV. The cable specifications are shown in Table 1. Consider that a 1mm² conductor can carry up to 3 A of current. Required: Provide an engineering solution to supply the LDP considering the following calculations. The best place for the transformer (close to the LDP or close to the MDP). The transformer core loss.
The transformer efficiency at the given rated loads. [IE] The smallest cable size that can be used without being overloaded. The maximum voltage drop across the cable. IM The maximum possible cable copper loss. Table 1 Number and Cross sectional area Overall diameter nominal dia, of Catalogue number wires Nominal Approx mm2 mm mm CXX1-05X 2.5 7x0.66 1.9 CXX1-06X 114 7x0.84 2.4 CXX1-07X 16 7x1.02 3.0 CXX1-08X 7x1.33 4.0 CXX1-09X 7x1.68 5.0 CXX1-10X 7x2.11 6.3 CXX1-11X 782.48 7.4 CXX1-14X 19x1.75 8.8 CXX1-16X 19x2.11 10.6 CXX1-17X 19x2.48 12.4 CXX1-19X 37x2.00 14.0 10 16 25 35 50 70 95 120 Max. DC resistance of 20 C ohm/km 7.4100 4.6100 3.0800 18300 11500 0.7270 0.5240 0.3870 0.2680 0.1930 0.1530
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