You have been given two single-phase transformers to determine their characteristics.Using the laboratory equipment and transformers provided, produce a laboratory report which includes details of the transformers: Equivalent circuitRegulationEfficiency From the report, suggests a typical application for each transformer with justifications for suggested operational requirements. Transformer 1400/115V transformerElectrical MachinesTransformer test resultsOpen CircuitIron Losses (Pi)1.5WCurrent (I)8.3mAShort CircuitVoltage ShortCircuit (Vsc)Current (Ip)38V0.124AVoltage Primary400VCopper Losses (Pc)2.2WTransformer 2230/12V transformer |Open CircuitIron Losses (Pc)2.5WCurrent (I)32.5mAShort CircuitVoltage ShortCircuit (Vsc)Current (Ip)50V0.88AVoltage Primary230VCopper Losses (Pc)3W

Suggestions for Applications (limited based on available information):Transformer 1: Based on the…

Transformer 1 400/115V transformer Electrical Machines Transformer test results Open Circuit Iron Losses (Pi) 1.5W Current (I) 8.3mA Short Circuit Voltage Short Circuit (Vsc) Current (Ip) 38V 0.124A Voltage Primary 400V Copper Losses (Pc) 2.2W Transformer 2 230/12V transformer | Open Circuit Iron Losses (Pc) 2.5W Current (I) 32.5mA Short Circuit Voltage Short Circuit (Vsc) Current (Ip) 50V 0.88A Voltage Primary 230V Copper Losses (Pc) 3W

Transformer 1 400/115V transformer Electrical Machines Transformer test results Open Circuit Iron Losses (Pi) 1.5W Current (I) 8.3mA Short Circuit Voltage Short Circuit (Vsc) Current (Ip) 38V 0.124A Voltage Primary 400V Copper Losses (Pc) 2.2W Transformer 2 230/12V transformer | Open Circuit Iron Losses (Pc) 2.5W Current (I) 32.5mA Short Circuit Voltage Short Circuit (Vsc) Current (Ip) 50V 0.88A Voltage Primary 230V Copper Losses (Pc) 3W

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter14: Power Distribution

Section: Chapter Questions

Problem 14.8P

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The following data were obtained on a 2.5 MVA, 50-Hz, 19.1-kV:3.81-kV single-phase transformertested at 50 Hz:Voltage (V) Current (A) Power (kW)LV winding with HV terminals open-circuited: 3810 9.86 8.14HV winding with LV terminals short-circuited: 920 141 10.3a. Calculate the cantilever equivalent-circuit parameters as referred to the transformer high-voltagewinding.b. Calculate the cantilever equivalent-circuit parameters as referred to the transformer low-voltagewinding.c. With the transformer carrying rated load and rated voltage at its low-voltage terminal, calculate thepower dissipated in the transformer.d. Repeat part a and b in per-unit. Compare and comment on your result.
2.A 10 kVA, 1000 V / 200 V, 50 Hz, single phase transformer has HV and LV sidewinding resistances as 1.1 Ωand 0.05 Ω respectively. The leakage reactances of HV and LV sides are respectively 5.2 Ω and 0.15 Ωrespectively. Calculate [i] the voltage to be applied to the HV side in order to circulate rated current with LVside shorted, [ii] Also calculate the power factor under this condition.
The actual equivalent circuit parameters of a single-phase transformer operating at 220/110 volts are given as follows. R1=0.2 ohm, X1=0.3ohm, RFe=45 kohm, Xm=5 kohm, R2=0.025ohm, X2=0.075 ohm Using the L-equivalent circuit, a) reduce the secondary circuit parameters to the primary b) Since a reduced load of 44.72+j32 ohms is connected on the secondary side, calculate the primary current, the load current, and the total copper losses.
the results of an open circuit and a short circuit test at rated frequency on a 500kVA, 42kV/2.4 kV, 60Hz single-phase transformer, with the following results: open circuit test, on the low voltage side Voc=2400V, Ioc= 18.1A, Poc=3785w. circuit test, on the low voltage side Vsc=1910 V, Isc=11.9A, Psc=3850 W. a) find the approximate equivalent circuit referred to the low voltage with the magnetizing branch independent of the short-circuit impedance b) Find the single-phase equivalent circuit in per unit referred to the high voltage side
9. A 3-phase transformer rated at 1,000 kVA, 11/3.3 kV has its primary windings wye-connected and its secondary windings delta-connected. The actual resistances per phase of these windings are: r1 = 0.375 Ω, r2 = 0.095 Ω; and the leakage reactances per phase are: x1 = 9.5 Ω, x2 = 2 Ω. Calculate the voltage at the normal frequency which must be applied to primary terminals in order to obtain full-load current in the windings when the secondary terminals are short-circuited. Also, calculate the power input under these conditions.
For the determination of one phase parameters of 20kVA 20000 / 480V, 60Hz transformerData were obtained by performing the following experiments.Blank running test: Vb: 480V Ib: 1.51A Pb: 271WShort circuit test: Vk: 1130V Ik: 1A Pk: 480Wa) Find the approximate equivalent circuit parameters with respect to the primary.b) When connected to the transformer to a load with a power factor of 0.8, it draws 42A at 480V. ItCalculate the yield in the conditions.
Q1. Three single-phase two winding transformers, each rated 400 MVA, 13.8kV/199.2kV, leakage reactance of 0.10 pu are connected to form a three phase transformer bank. Winding resistance and exciting current are neglected. The high voltage windings are star connected. A three-phase load operated under balanced positive sequence conditions on the high voltage side absorbs 1000 MVA at 0.9pf lagging, a phase voltage of 199.2/0°kV. Determine the phase voltage at the low voltage bus if the low-voltage windings are also star connected.
A three-phase two-winding transformer rated 1200 MVA, 14kV/162kV has a leakage reactance of j0.10 pu. A three-phase load operating under balanced positive phase sequence conditions on the secondary side absorbs 1000 MVA at 3 0.9pf lagging with a terminal voltage of 161kV. Use the given information to answer the following questions: i) Draw a reactance diagram for the circuit. ii. Determine the following: The voltage at the primary when the primary side of the transformer is star connected iii. The voltage at the primary when the primary side of the transformer is delta connected
For the single phase system given in the Figure, the following ratings are given. Transformer A-B: 500V/1.5kV, 9.6 kVA, leakage reactance = 5%. Transformer B-C: 1.2kV/120V, 7.2kVA, leakage reactance= 4%. Line B: series impedance = 0.5+3j Ω. Load C: 120V, 6kVA at 0.8 power factor lagging. a) Determine the actual values of the load impedance and the leakage reactance’s of the transformers referred to primary and secondary sides. b) Choosing 1.2kV as the voltage base for circuit B and 10kVA as the system wide kVA base, express all system impedances in per unit. c) What is the appropriate sending-end voltage (Vs) corresponds to the given loading conditions?
a substation receives 6000 KVA at 6 KV pointed power factor lagging on load voltage side of a transformer from s generating station through a three phase cable system having resistance of 7 ohm and reactance of 2 ohm per faced identical 6600 buy 3300 volt transformer are installed at each end 6600 volt side being delta connected respectively referred to HV side calculate the voltage at generating station bus bar
We have 10kVA, 4800/240 V, 50Hz single phase transformer. R1 is measured as R1 = 20 Ω From the short circuit test (secondary short circuited) : Usc = 179V, Psc = 181W, Isc = 2A From the no load test (secondary open circuited) : U20 = 240V, P20 = 60W, I20 = 1,5A When the output power is 10kVA with cosφ2=0,9 inductive, find: Calculate the transformer parameters Iron loss and Copper loss Output power Efficiency "check image - please clearly "
A 10kVA 2000/400V single phase distribution transformer has a primary and secondary winding impedances of 0.5+j10 and 0.2+j0.45 ohms. Calculate the voltage across the secondary terminals at full load, 80% pf lagging, when the primary is supplied with 2000 volts?