Calculate the daily efficiency of a single-phase joule with an output power of 350 kilovolts-ampere at full load. If the pulp and copper tissues at full pregnancy are equal 4.2 kW 3.2 kilowatts, respectively. If the transformer works during the hours of the day as follows: (1) Six hours at full load and has a factor of 0.85 lag. (ii) Three hours at three quarters of full load and treat capacity 0.8 late. (ii) A year of hours at a quarter of a full pregnancy and an amount of one is treated. (7) Four hours at one-fifth of the full pregnancy, and its amount is treated as one. (7) Five hours when not pregnant. e 8:52

Calculate the daily efficiency of a single-phase joule with an output power of 350 kilovolts-ampere at full load. If the pulp and copper tissues at full pregnancy are equal 4.2 kW 3.2 kilowatts, respectively. If the transformer works during the hours of the day as follows: (1) Six hours at full load and has a factor of 0.85 lag. (ii) Three hours at three quarters of full load and treat capacity 0.8 late. (ii) A year of hours at a quarter of a full pregnancy and an amount of one is treated. (7) Four hours at one-fifth of the full pregnancy, and its amount is treated as one. (7) Five hours when not pregnant. e 8:52

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

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.7P: Consider a source of voltage v(t)=102sin(2t)V, with an internal resistance of 1800. A transformer...

See similar textbooks

Similar questions

A two-winding single-phase transformer rated 60kVA,240/1200V,60Hz, has an efficiency of 0.96 when operated at rated load, 0.8 power factor lagging. This transformer is to be utilized as a 1440/1200-V step-down autotransformer in a power distribution system. (a) Find the permissible kVA rating of the autotransformer if the winding currents and voltages are not to exceed the ratings as a two-winding transformer. Assume an ideal transformer. (b) Determine the efficiency of the autotransformer with the kVA loading of part (a) and 0.8 power factor leading.
Consider two interconnected voltage sources connected by a line of impedance Z=jX, as shown in Figure 2.27. (a) Obtain expressions for P12 and Q12. (b) Determine the maximum power transfer and the condition for it to
Consider Figure 3.4. For an ideal phase-shifting transformer, the imda nce is unchanged when it is referred from one side to the other. (a) True (b) False
The transformer of Problem 3.16 is supplying a rated load of 50 kVA at a rated secondary voltage of 240 V and at 0.8 posr factor lagging. Neglect the transformer exciting current. (a) Determine the input terminal voltage of the transformer on the high-voltage side. (b) Sketch the corresponding phasor diagram. (c) If the transformer is used as a step-down transformer at the load end of a feeder whose impedance is 0.5+j2.0, find the voltage VS and the power factor at the sending end of the feeder.
An infinite bus, which is a constant voltage source, is connected to the primary of the three-winding transformer of Problem 3.53. A 7.5-MVA,13.2-kV synchronous motor with a sub transient reactance of 0.2 per unit is connected to the transformer secondary. A5-MW,2.3-kV three-phase resistive load is connected to the tertiary Choosing a base of 66 kV and 15 MVA in the primary, draw the impedance diagram of the system showing per-unit impedances. Neglect transformer exciting current, phase shifts, and all resistances except the resistive load.
Consider a source of voltage v(t)=102sin(2t)V, with an internal resistance of 1800. A transformer that can be considered as ideal is used to couple a 50 resistive load to the source. (a) Determine the transformer primary-to-secondary turns ratio required to ensure maxi mum power transfer by matching the load and source resistances. (b) Find the average power delivered to the load, assenting maximum power transfer.
A 400-turns auto transformer, operating in the step-down mode with 25 percent tap supplies a 4.8 kVA, 0.85 lagging power factor load. The input to the transformer is 2400 V, 60 Hz. Neglect the small losses and leakage effects. What will be the apparent power(in kVA) conducted and transformed respectively?
A 50 MVA, 11/132 kV three-phase, 50 Hz, generator transformer has guaranteed parameters as, load loss 160 kW at full load at 75°C, no load loss 30 kW and percentage reactance 9% at rated load. Calculate the following:*percentage regulation a full load and unity power factor*percentage regulation at 3/4 load and 0.85 lagging power factor*efficiency at full load and unity power factor*efficiency at 3/4 load and 0.85 lagging power factor(Use 5 decimal places)
A single - phase transformer rated 60 KVA in connected to 400/235 VA 5HZ supply, has an efficiency of us at fuit load If the terminal voltage on full load is 200 V. Determine the voltage regulation and output frequency Voltage Regulation Frequency
A 270 kVA transformer has primary and secondary winding resistances of 0.6Ω, and 0.0016Ωrespectively. The iron loss is 2.25 KW and the primary and secondary voltages are 7kV and 320 Vrespectively. If the power factor of the load is 0.6 lag, find the efficiency of the transformer for 20% of fullload.
If the turn ratio of a step-down transformer is 10:1 and the series impedance (referred to the primary) of j50 ohm. If the no-load primary voltage is 230 kV (line-to-line), the secondary side is serving a Y-connected balance load of 1.5+ j0.25 ohms, the reactive power (per phase) absorbed by the load would be?
A 120:480-V, 10-kVA step-up two-winding transformer is to be used as an autotransformer to supply a 120-V circuit from a 600-V source (a step-down autotransformer). When it is tested as a two-winding transformer at rated load, unity power factor, its efficiency is 97.9 %. 1.Show the connection diagram of the transformer converted as an autotransformer and identify which is the series winding Nse and the common winding Nc.