Question

In: Electrical Engineering

Plate values ​​of a three-phase transformer are given below: 1600 kVA, 15 kV / 400 V,...

Plate values ​​of a three-phase transformer are given below:
1600 kVA, 15 kV / 400 V, 50 Hz, io = 1.2%; ukN = 6%, idle losses 2450 W, rated copper losses of power 14500 W; Dy5.


a) Calculate primary and secondary line and phase currents.


b) Secondary at 75% load in power factor with 0.85 inductance and 0.85 capacity calculate the voltage separately. Compare and interpret the results. capacity at what time of day can the upload be seen? To prevent voltage change What solution should be applied?


c) Calculate the rated operating efficiency and maximum efficiency of the transformer.( Power Factor of b) can be used in c).


d) Draw the fastening group. How is this transformer parallel with the transformer Dy11 connected
run?


e) If this transformer is operated at 60 Hz, which sizes change how?
Your review.

Solutions

Expert Solution

I have given the solution step by step. Please feel free to ask quires in comments. I'm available to address your quires. Please support with upvote  

Manojponduru answered 4 months ago
Next > < Previous

Related Solutions

Plate values of a three-phase transformer are given below: 1600 kVA, 15 kV / 0,4 kV,...
Plate values of a three-phase transformer are given below: 1600 kVA, 15 kV / 0,4 kV, 50 Hz, i0 = 1.2%; ukN= 6%, idle losses 2450 W, rated power copper losses 14500 W; Dy5 connected.. III) If there is 75% load in the power factor with 0.85 inductance and 0.85 capacity. At what times of the day can capacity loading be seen? What solution should be applied to prevent voltage change? IV) Draw the fastening group. How can this transformer...
Plate values of a three-phase transformer are given below: 1600 kVA, 15 kV / 0,4 kV,...
Plate values of a three-phase transformer are given below: 1600 kVA, 15 kV / 0,4 kV, 50 Hz, i0 = 1.2%; ukN= 6%, idle losses 2450 W, rated power copper losses 14500 W; Dy5 connected.. Calculate the secondary VOLTAGE separately at 75% load in the power factor with 0.85 inductance and 0.85 capacity. Compare and interpret the results. At what times of the day can capacity loading be seen? What solution should be applied to prevent voltage change?
A three phase synchronous motor is Y-connected with the following values: 2.3 kV, 400 hp, 60...
A three phase synchronous motor is Y-connected with the following values: 2.3 kV, 400 hp, 60 Hz, 8 poles with a rated pf of 0.85 leading. It is 90% efficient at full load with an armature resistance of 0.80 Ohms and synchronous reactance of 11 Ohms. At full load calculate the output torque, and internal generated voltage (EA)
A 100MVA, 400 delta / 11Y kV, 3-phase transformer has Z(eq) = 0.02+j0.05 ohm per phase...
A 100MVA, 400 delta / 11Y kV, 3-phase transformer has Z(eq) = 0.02+j0.05 ohm per phase referred to the low-voltage side, and R(c) = 1800 ohm per phase referred to the high-voltage side. If the transformer supplies rated voltage at full load at 0.8 power factor lagging. Determine its voltage regulation and efficiency.
The efficiency of a 400-kVA, single-phase, 60-Hz transformer is 98.77% when delivering full-load current at 0.8...
The efficiency of a 400-kVA, single-phase, 60-Hz transformer is 98.77% when delivering full-load current at 0.8 power factor, and 99.13% with half-rated current at unity power factor. calculate: (a) The iron loss. (b) the full-load copper loss. (c) the efficiency at 3/4 load, 0.9 power factor
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.
4.11)The equivalent circuit parameters of a 150 kVA, 2400 V/ 240 V, 60 Hz transformer are...
4.11)The equivalent circuit parameters of a 150 kVA, 2400 V/ 240 V, 60 Hz transformer are as follows: RHV = 0.21Ω, RLV = 2mΩ, XlHV = 0.45Ω, XlLV = 4.6mΩ, XmHV = 1.6kΩ, and RcHV = 12kΩ. The transformer delivers to a load, rated current at a power factor of 0.85 lagging at rated voltage. Determine the input voltage, current, apparent power and power factor, (a) using the approximate equivalent circuit, and (b) not using the approximate equivalent circuit. Problem...
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 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...
Find the main dimensions of a 2500 KVA, 187.5 rpm, 50 Hz, 3 phase, 3 kV,...
Find the main dimensions of a 2500 KVA, 187.5 rpm, 50 Hz, 3 phase, 3 kV, salient pole synchronous generator. The generator is to be a vertical, water wheel type. The specific magnitude loading is 0.6 Wb/m2 and the specific electric loading is 34000 A/m. Use circular pole with ratio of core length to pole pitch=0.65. Find the normal speed.
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT