Compute the all day efficiecny of a 20kvA distribution transformer having full load efficiency of 90percent and the full load copper loss is just equal to the constant iron loss the loading is as per schedule is at 0.90 power factor no load for 12 hrs 20percent of full load for 2hrs, 55percent load for 5hrs and 100 percent load

Q: Three 100kVA 34.5kV primary 12/6.9kV secondary. Connect the transformers delta-wye. What is the…

A: Given: A transformer with Three 100kVA 34.5kV primary 12/6.9kV secondary. Primary is delta…

Q: A 209 V / 125 V single-phase transformer has a core loss of 120 W and the no-load current is 0.7 A.…

A: We need to calculate power factor .we will use given data to calculate power factor

Q: A single-phase transformer is required to step down the voltage from 1100 V to 230 V at 50 Hz. The…

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Q: A 215 V/ 123 V single-phase transformer has a core loss of 120 W and the no-load current is 0.7 A.…

A: Given- A 215 V/123 V single-phase transformer has, Core loss, Wo=120 W Primary side voltage, V1=215…

Q: In transformer, the hysteresis loss depends on load current O only flux density O both frequency and…

A: consider the given question;

Q: A transformer has a rated output of 300 kVA at a power factor of 1.2. Determine the rated power…

A: Please comment if you need any clarification. If you find my answer useful please put thumbs up.…

Q: A 3-phase 100OKVA, 11000/416 transformer is delta-connected on the primary and star connected on the…

A: A transformer is an electrical machine which is used in AC circuit to either step up or step down…

Q: What will be the losses of a transformer, if it is working in step up mode compared to losses in…

A: The transformer that has the output voltage more than the primary is the step up transformer. In…

Q: If the core loss of single phase transformer at full load is 294 W, then the core loss at 50% of…

A: In this question we need to find a core loss of a transformer  at 50% load

Q: I will upvote for correct answer A transformer has a rated output of 300 kVA at a power factor of…

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Q: In load test on single phase transformer, the secondary voltage increases with decrease in load.…

A: Ans. True

Q: 50-kVA, 13,200/480-V distributed transformer, the no-load current will be around Select one: O a.…

A: No loade current is always (0-5%) ofRated currentif transformer iscase1 single phaseH.V…

Q: mer has primary and 80 turns on the secondary. The primary 2. A 100 KVA transf and secondary…

A: Given data, The rating is 100kVA. Primary resistance  = 0.3Ω Secondary resistance  = 0.1Ω Primary…

Q: A Transformer has turns ratio of 2:15. When the secondary turns is 300, what is the primary turns?…

A: Given, Turns ratio of transformer N1N2=215 Secondary turns N2=300

Q: A 205 V/ 129 V single-phase transformer has a core loss of 124 W and the no-load current is O0.8 A.…

A: In the question, given  a single phase transformer 205/129V  Core loss Po= 124W Current at no load =…

Q: efficiency

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Q: If the no load secondary voltage of a 1-phase transformer is 232 V and full load secondary voltage…

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Q: A 3-phase 10OOKVA, 11000/416 transformer is delta-connected on the primary and star connected on the…

A: TRANSFORMER: The transformer transfers power from one circuit to another circuit without a change…

Q: A 500 kVA transformer has a constant loss of 500 W and copper loss at full load are 2000 W. Then at…

A: Solve the problem

Q: Look at the following figure and answer the following questions based on the fact the transformer is…

A: Given: The transformer is 240/480V to 120/240V 4kVA single phase:

Q: 05 V/ 129 V single-phase transformer has a core loss of 124 W and the no-load current is 0.8 A. The…

A:

Q: If the core loss of single phase transformer at full load is 284 W, then the core loss at 25% of…

A: Core losses at full load = 284W. Find the core losses at 25% load?

Q: If the core loss of single phase transformer at full load is 316 W, then the core loss at 50% of…

A: If the core losses of single phase transform at full load = 316W Find the losses at 50% load?

Q: A-60 kVA Transformer at full load the copper losses 1000 W while the core losses 500 W. What is the…

A: Given a single phase transformer with, Power rating, S=60 kVA. Copper loss, Pcu=1000 W. Core loss,…

Q: In transformer, the power will with decrease in current. O be doubled remain same O increases O…

A: In the step-up transformer, the voltage increase then the current is reduced proportionally. For…

Q: A 3-phase 10OOKVA, 11000/416 transformer is delta-connected on the primary and star connected on the…

A: A transformer is an electrical machine which is used in AC circuit to either step up or step down…

Q: If the no load secondary voltage of a 1-phase transformer is 233 V and fullI load secondary voltage…

A:

Q: QUESTION 8 A single phase 600v/120v transformer has a load of 30 ohms resistive and 20 ohms…

A: Given data, Voltage rating of transformer 600 V/120 V. Load impedance Z=30+j20 Ω.

Q: In transformer, the power will with decrease in current. O decreases O be doubled remain same O…

A: Transformer is constant power and constant frequency device. In transformer current and volatages…

Q: the core loss of single phase transformer at full O 52W O 105W O 13W O 210W

A: In transformer, mainly two losses present namely core and copper losses.

Q: Draw the graph of efficiency against load current when the transformer is loaded 12:48 PM

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Q: Two transformers are to be operated in parallel such that they share load in proportion to their KVA…

A: Given, Two transformers are to be operated in parallel such that Load ∝ kVA rating The rating of the…

Q: Three single phase transformers are connected in a Wye-Wye configuration.  Each transformer is rated…

A: Wye-Wye configuration  Transformer rated 25kv/62kv Load = 640 KVA Supply = 25Kv (L-N)

Q: transducer has the positive temperature coefficient. If the core loss of single phase transformer at…

A: We need to tell about the positive temperature coefficient transducer and core losses at half load .

Q: A 212 V/ 116 V single-phase transformer has a core loss of 124 W and the no-load current is 0.7 A.…

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Q: The copper loss of a transformer at 4/5 of the full load is 3500 W,  full load copper loss will be

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Q: The maximum size overcurrent device for primary only protection of a three-phase 75 kVA transformer…

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Q: Maximum flux density in the core of a 250 V/3000 V, 50 Hz single phase transformer is 0.6 Wb/m². RMS…

A: