A 140/32 V, 950 VA, 50 Hz single-phase transformer gave the following test results: Open circuit test on LV side: Ioc=5.05 A, Poc = 134 W Short circuit test on HV side: Vsc = 25 V, Psc = 92 W A 22 load is connected to the LV side with rated voltage on the HV side.

If the core loss of single phase transformer at full load is 39 W, then the core loss at 25% of load is O 20W 10W 39W O2W search O O O 0

Q10) For the transformer shown in Figure below, determine (i) The turns ratio of the transformer (ii) The secondary current (iii) The voltage across the load R = 10k2 (iv) The voltage across the primary winding Ip = 3A Is = ? Ns = 20 turns RL Np = 60 turns 10k2 ellle lelll

Three single phase 11000/220 V transformers are connected to form 3-phase transformer bank. High voltage side is connected is star, and low voltage side is in delta. What are the voltage ratings and turn ratio of 3-phase transformer? 19052 a) V, 50 220 11000 381 c) V, 50 √3 b) d) 19052 220 V, 50√3 11000 220 7.50

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The following values ​​were seen in the measurements made separately by the primary and secondary of a 220/270 V phase transformer. R1 = 4 ohms, X1 = 4.6 ohms, R2 = 0.89 ohms, X2 = 1.79 ohms; R2T = 8.7 ohms, X2T = 8.8 ohms (total values ​​measured on the secondary side), Xm = 60 ohms, Rfe = 750 ohms, (using a T-type equivalent circuit) a.) Primary and secondary currents and their phase angles b.) Active and reactive powers drawn by the transformer from the network. please solve them all, thanks..

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

The maximum size overcurrent device for primary only protection of a three-phase 45 kVA transformer with a 480V primary and a 120/208V secondary is Oa.50A Ob.60A Oc. 70A Od.90A

925 3- The approximate equivalent circut of is to be determined. The open-circuit at 0 20KVA, 8000/240 V 60 Hz transformar short-circut tests that were performed transformer. primary side gave the following results. Open - Circut Test V₁x = 8000 Iloc=0-214 A Ploc = 400 W Short-Circuit Test |Visc = 489V 5₁s = 2.5A Pisc = 240k/ al Find the components of the magnetising branch i referred to the primary side b) Find the Components of the equivalent series impedence referred to the primary side. 119 210 2 15 16

Q/A single-phase transformer with a capacity of 100 kVA and a voltage of 2000/400 and the equivalent circuit elements are: As follows R1 = 0.1 02 x1 = 0.2 2 R2 = 0.25 2 X2 = 0.75 2 RO = 500 XO = 150 Q and feeds a load of 90 kVA at a voltage of 2000 volts and a power factor of 8.0 in delay. Calculate voltage and current Primary Royl ww JX eql