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2. The secondary winding of a transformer has a terminal voltage of (t)=169.7 sin3141 V. The...
Q1. The secondary winding of a transformer has a terminal voltage of Vs(t) = 325.27 sin...
Q1. The secondary winding of a transformer has a terminal voltage of Vs(t) = 325.27 sin 3770 V. The turns ratio of the transformer is 100:200 (a = 0.50). If the secondary current of the transformer is Is(t) = 11.32 sin (377t - 36.87°) A, The impedances of this transformer referred to the primary side are Req=0.2002 Rc =95022 Xeq=0.7500 Xm=3800 c) Obtain the efficiency of the transformer (10 marks
Problem 1: The secondary winding of a transformer has a terminal voltage of v, (t) 282.8...
Problem 1: The secondary winding of a transformer has a terminal voltage of v, (t) 282.8 sin 377t V. The turns ratio of the transformer is 100:200 (a0.50) The impedances of this transformer referred to the primary side are The equivalent circuit is shown below lf (a) If the secondary current of the transformer is i,()-7.07sin(3771-36.87) A, what is the primary current of this transformer? (20 points) HINTS: I. Peak values of the secondary voltage and current are specified in...
Problem 1: A three-phase transformer has the following name plate data: Rated Power Primary voltage Secondary...
Problem 1: A three-phase transformer has the following name plate data: Rated Power Primary voltage Secondary Voltage Excitation reactance Series Impedance 150 MVA 230 kV 32 kV 30 (pu) 0.02+0.15j (pu) The transformer is Y/A connected. Answer the following questions: a) What are the nominal (rated) primary and secondary line currents?| b) What is the nominal value of the Delta-side winding (internal) current? c) What is the secondary to primary winding turn ratio? d) The transformer is supplying 150 MVA...
If a lossless transformer has 1000 turns for a primary winding and 100 turns for the...
If a lossless transformer has 1000 turns for a primary winding and 100 turns for the secondary winding, and the voltage at the secondary terminal is 10 volts, what is the voltage at the primary terminal?
A 5 KVA, 480/120V, 60 Hz, non-ideal transformer has the following primary and secondary resistance and...
A 5 KVA, 480/120V, 60 Hz, non-ideal transformer has the following primary and secondary resistance and reactance values R 80,X1-12Q, R 0.15Q, X 0.20, R 18 KQ, and X 15 KO If the transformer is operating at 90% of its rated load current and the voltage is leading the current by 40 degree: a) Draw the approximate equivalent circuit of the transformer referred to secondary side, b) Calculate the efficiency of the transformer, and c) The voltage regulation
A single-phase transformer is rated at 10 kVA, 240/100 V. When the secondary terminals are open-circuited...
A single-phase transformer is rated at 10 kVA, 240/100 V. When the secondary terminals are open-circuited and the primary winding is supplied at normal voltage, the input current is 2.6 A at a power factor of 0.3 lag. When the secondary terminals are short-circuited, a voltage of 18 V applied to the primary causes the full-load current to flow in the secondary, the power input to the primary being 240 W. Calculate (a) the regulation (b) the efficiency of the...
Problem 3 Consider a three-winding transformer, as shown in Figure (2.) with the following particulars: Zp=0.025+j0.08...
Problem 3 Consider a three-winding transformer, as shown in Figure (2.) with the following particulars: Zp=0.025+j0.08 V =410 Zs= 0.025+j 0.07 12=55/-30° Z= 0.025+ 0.08 13=45/-40° Assume that V1 is the reference, calculate: (a) The primary current 1: [5 points] (b) The intermediate voltage Vo [5 points) (c) The secondary voltage V2 and tertiary voltage V3 referred to the primary side. [5 points] (d) The apparent powers and power factors at the primary, secondary and tertiary terminals. [5 points) (e)...
B. A single-phase transformer has the following parameters. N1/N2 10; Req 12, Xeq 102, X 22W,...
B. A single-phase transformer has the following parameters. N1/N2 10; Req 12, Xeq 102, X 22W, RO 10002, X 0 50002 The rated voltage of the primary winding is 1000V. A load of 0.5 230° is connected across the secondary windings of the transformer. Compute the following a. The load voltage referred to primary V2' and the load voltage V2 c. The currents of the primary and secondary windings d. The voltage regulation e. The efficiency of the transformer
An ideal transformer has a primary winding with 100 turns and a secondary winding with 20...
An ideal transformer has a primary winding with 100 turns and a secondary winding with 20 turns. If the primary winding has a voltage drop of 10 V AC, what is the EMF in the secondary coil? A. 100 V AC B. 10 V AC C. 2 V AC D. 20 V AC
EMM2802 MAYIJUNE 2016 QUESTION B A single phase transformer has a high voltage to low voltage...
EMM2802 MAYIJUNE 2016 QUESTION B A single phase transformer has a high voltage to low voltage ratio of 10. The following parameters are referred to low voltage side, with a supply of 200V. Equvalent Impedance referred to low woltage side Zev 0.1+jo.s a Load impedance referred to low voltage side R-4000 X-2310 Magnetizing Branch referred to low voltage side Draw an approximate equivalent circut with the given parameters and determine the following: 81 The magnetizing current (), the core loss...
Q1. The secondary winding of a transformer has a terminal voltage of Vs(t) = 325.27 sin 3770 V. The turns ratio of the transformer is 100:200 (a = 0.50). If the secondary current of the transformer is Is(t) = 11.32 sin (377t - 36.87°) A, The impedances of this transformer referred to the primary side are Req=0.2002 Rc =95022 Xeq=0.7500 Xm=3800 c) Obtain the efficiency of the transformer (10 marks
Problem 1: The secondary winding of a transformer has a terminal voltage of v, (t) 282.8 sin 377t V. The turns ratio of the transformer is 100:200 (a0.50) The impedances of this transformer referred to the primary side are The equivalent circuit is shown below lf (a) If the secondary current of the transformer is i,()-7.07sin(3771-36.87) A, what is the primary current of this transformer? (20 points) HINTS: I. Peak values of the secondary voltage and current are specified in...
Problem 1: A three-phase transformer has the following name plate data: Rated Power Primary voltage Secondary Voltage Excitation reactance Series Impedance 150 MVA 230 kV 32 kV 30 (pu) 0.02+0.15j (pu) The transformer is Y/A connected. Answer the following questions: a) What are the nominal (rated) primary and secondary line currents?| b) What is the nominal value of the Delta-side winding (internal) current? c) What is the secondary to primary winding turn ratio? d) The transformer is supplying 150 MVA...
A 5 KVA, 480/120V, 60 Hz, non-ideal transformer has the following primary and secondary resistance and reactance values R 80,X1-12Q, R 0.15Q, X 0.20, R 18 KQ, and X 15 KO If the transformer is operating at 90% of its rated load current and the voltage is leading the current by 40 degree: a) Draw the approximate equivalent circuit of the transformer referred to secondary side, b) Calculate the efficiency of the transformer, and c) The voltage regulation
A single-phase transformer is rated at 10 kVA, 240/100 V. When the secondary terminals are open-circuited and the primary winding is supplied at normal voltage, the input current is 2.6 A at a power factor of 0.3 lag. When the secondary terminals are short-circuited, a voltage of 18 V applied to the primary causes the full-load current to flow in the secondary, the power input to the primary being 240 W. Calculate (a) the regulation (b) the efficiency of the...
Problem 3 Consider a three-winding transformer, as shown in Figure (2.) with the following particulars: Zp=0.025+j0.08 V =410 Zs= 0.025+j 0.07 12=55/-30° Z= 0.025+ 0.08 13=45/-40° Assume that V1 is the reference, calculate: (a) The primary current 1: [5 points] (b) The intermediate voltage Vo [5 points) (c) The secondary voltage V2 and tertiary voltage V3 referred to the primary side. [5 points] (d) The apparent powers and power factors at the primary, secondary and tertiary terminals. [5 points) (e)...
B. A single-phase transformer has the following parameters. N1/N2 10; Req 12, Xeq 102, X 22W, RO 10002, X 0 50002 The rated voltage of the primary winding is 1000V. A load of 0.5 230° is connected across the secondary windings of the transformer. Compute the following a. The load voltage referred to primary V2' and the load voltage V2 c. The currents of the primary and secondary windings d. The voltage regulation e. The efficiency of the transformer
EMM2802 MAYIJUNE 2016 QUESTION B A single phase transformer has a high voltage to low voltage ratio of 10. The following parameters are referred to low voltage side, with a supply of 200V. Equvalent Impedance referred to low woltage side Zev 0.1+jo.s a Load impedance referred to low voltage side R-4000 X-2310 Magnetizing Branch referred to low voltage side Draw an approximate equivalent circut with the given parameters and determine the following: 81 The magnetizing current (), the core loss...
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