Question

In: Electrical Engineering

A 6kVA, 220 /24V, 50Hz single-phase transformer has the following test results: Open circuit test (measured...

A 6kVA, 220 /24V, 50Hz single-phase transformer has the following test results:

Open circuit test (measured form high-voltage side): V(oc) = 220V, I(oc) = 5A, P(oc) = 150W
Short circuit test (measured from low-voltage side): V(sc) = 10V, I(sc) = 28A, P(sc) = 250W

Find the per-unit approximate equivalent circuit parameters of the transformer.

Solutions

Expert Solution


Related Solutions

A single-phase transformer of 3 kVA, 60 Hz, has a voltage ratio on open circuit of...
A single-phase transformer of 3 kVA, 60 Hz, has a voltage ratio on open circuit of 240 / 120 V. The primary and secondary resistances are 0.25 Ω and 0.05 Ω respectively, the corresponding leakage reactance being 0.75 Ω and 0.18 Ω. The transformer delivers current to the load at a 0.9 power factor lagging. Determine the voltage across the load.                                                                   Determine the power dissipated by the load.                                                          Determine percentage voltage regulation referred to the secondary...
The secondary of a 500kVA, 4400/500 V, 50Hz, single-phase transformer has 500 turns. A) determine emf...
The secondary of a 500kVA, 4400/500 V, 50Hz, single-phase transformer has 500 turns. A) determine emf per unit. B) primary turns. C) secondary full load current D) maximum flux E) gross cross-sectional area of the core for flux density of 1.2 tesla F) if the core is square cross-section find the width of the limb
I have to design a single phase/50Hz step down transformer. Following information is given Primary Voltage...
I have to design a single phase/50Hz step down transformer. Following information is given Primary Voltage =240V, Secondary Voltage and current on secondary side should be 24V and 2A respectively. efficiency should be in range of 70 to 80%. Provide me all the necessary calculations to design this step down transformer. And also note down all the hardware components that i should buy for this design. Note: Tell me if i have missed any information for this project.
A single-phase 300-kVA, 220/4400 V, 60 Hz transformer yielded the following information when tested: High voltage...
A single-phase 300-kVA, 220/4400 V, 60 Hz transformer yielded the following information when tested: High voltage winding open: Voltage=220 V, Current=40 A Power=l 000W Low voltage terminal shorted: Voltage= 195 V, Current=68.18A Power=4000W Find the equivalent circuit of the transformer as viewed from the high voltage Calculate the .efficiency of the transformer when it delivers its rated load at rated terminal voltage and 8 power factor lagging.
A single phase, 300???, 11??/2.2??, 60 ?? transformer has the following parameters referred to the high-voltage...
A single phase, 300???, 11??/2.2??, 60 ?? transformer has the following parameters referred to the high-voltage side: ?? = 57.6??, ?? = 16.34??, ??? = 2.784? and ??? = 3.5?. If a load of ????? = 16∠30°? connected to the low-voltage side: a) Find the voltage regulation? b) Draw the phasor diagram? c) Find the efficiency of the transformer? d) Repeat part a and b at ????? = 16∠ − 30°??
The test results for the approximate equivalent circuit of a three-phase induction motor are shown below....
The test results for the approximate equivalent circuit of a three-phase induction motor are shown below. No-load test: equivalent applied voltage 120 V, input current 5 A, equivalent input 480 W Restraint test: Applicable voltage 20V, input current 40A, equivalent input 480W Determine the equivalent circuit constants of Rc, Xm, Rs + Rr, and Xs + Xr when friction and wind losses are ignored. Answer - 30Ω, 40Ω, 0.3Ω, 0.4Ω
A4-pole,250V, 50Hz single phase induction motor has rotor frequency 2 Hz, in starting has following parameters:...
A4-pole,250V, 50Hz single phase induction motor has rotor frequency 2 Hz, in starting has following parameters: main winding Rm=2 Ω ,Xm=4 Ω and staring winding : Rs =4 Ω , XLS=2 Ω ,Xcs=8 Ω. Find : speed of motor, Im , IS, θm θs, α and p.f.
What are the procedures and purpose of Open Circuit Test and Short Circuit test with the...
What are the procedures and purpose of Open Circuit Test and Short Circuit test with the aid of suitable diagrams.
Exercises 1. A 25 kVA single-phase transformer has the primary and secondary number of turns of...
Exercises 1. A 25 kVA single-phase transformer has the primary and secondary number of turns of 200 and 400, respectively. The transformer is connected to a 220 V, 50 Hz source. Calculate the (i) turns ratio, and (ii) mutual flux in the core. 2. A 25 kVA, 2200/220 V, 50 Hz single-phase transformer’s low voltage side is short-circuited and the test data recorded from the high voltage side are P=150 W, I1 = 5A and V1 = 40 V. Determine...
A 3 phase 50Hz overhead line has the following constants: R/phase=2ohms; Xl/phase=10ohms and Y/phase=4x10^-4 siemens. The...
A 3 phase 50Hz overhead line has the following constants: R/phase=2ohms; Xl/phase=10ohms and Y/phase=4x10^-4 siemens. The line is supplying a balanced load of 24000 KVA, 0.8 pf lagging at 66KV. Compute for the sending end voltage, sending end current and efficiency of the line using: a.Nominal T Method b.Nominal pi Method c.Rigorous Method
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT