3. A 7970 V:120 V, 60 Hz potential transformer has the following parameters as seen from the high-voltage (primary) windings: X₁ X = 1721 Ω _ Χ = 1897 Ω Xm = 782 k R₁ = 1378 52 R₂ = 1602 £2 a) Assuming that the secondary is open circuited and that the primary is connected to a 7.97 kV source, calculate the magnitude and the phase angle (with respect to the high-voltage source) of the voltage at the secondary terminals. b) Calculate the magnitude and the phase angle of the secondary voltage if a 1-kn resistive load is connected to the secondary terminals.

A 120 kVA, 1350/330 V single phase transformer has the following parameters: R1 = 0.34 Q, X1 = 0.59 0, R2 = 0.014 Q, X1 = 0.029 Q, Rc = 380 and Xm = 320 Q. The no load current is 4.7 A at a power factor of 0.36 lagging and the no load losses are 4.6 kW. For a full load and 0.9 power factor lagging with 300 V load terminal voltage, determine (a) equivalent circuit parameters referred to primary side, (b) percentage regulation and (c) full load efficiency. O:01 AM

Need it ASAP A transformer has a rated output of 200 kVA at a power factor of 0.6. Determine the rated power output and the corresponding reactive power.

I need the solution to this problem by an expert using the above-mentioned law.

Chemistry

A 20 KVA, 2000/480-V, 50 Hz, single-phase transformer is tested with the following results. Find the impedance referred to the HVS of the transformer. OCT measured from LVS Voc = 480 V loc=1.75 A Poc=288 W Select one: O a. Rc,s = 800 02, and XM,S = 292 O b. O c. None Rcp = 13.9 K2, and XM,p = 5.07 K O d. Reqp = 800 2, and Xeqp = 292 Oe. Req,s = 13.9 KQ, and Xeqs = 5.07 K

Excercies: 1. Two transformers A and R to a load of (2+jh5) Their impedanas in secondary terms Coltjo.6)5r EA = 200 Lov output and Power factor of each transformer are Connected in parallel ZA = (o15t+j 0.8)2 and zR= Their noload termind nltages are and Es = 21010V Fnd the poer are %3D 11 2. Two trans formes A andB of ratings 500KVA and 25okVA supplying a load kVA of 750 at a8 Pf lagging. Their open circuit voltayes are 400V and 410V respecctively. Transformer A has 1% rsistance and 5/ reactance and transformer B hay s resistance and 4 reactance. Fnd (a) Cross-curnt in the seondaries load shared by each transforcmer. are on no-load,b) the 2.

In a single phase transformer, if the average value of emf is 231 V, then RMS value is O 115.50 O 256.41 133.37 O 400.10

n 7 In step up transformer, secondary turns are less than primary turns. out of Select one: O True uestion O False VION MS team link Jump to... search Chp