Two three-phase 11kV/ 380 V transformers are connected in parallel to serve a load of 36 kVA at unity power factor. The secondary side current for one transformer is 14.1 A, determine the load sharing for each transformer and the current of the other transformer.

Q: The primary and secondary winding resistances of a 30 KVA, 6600 /250 V, 1 phase transformer are 8…

A:

Q: The primary of a certain transformer, with and open-circuit secondary, takes 1A at a power factor of…

A: Given I2=50Apower factor ϕ0=0.4power factor ϕ2=0.8

Q: 10-KVA, 2400/240 V, single-phase transformer has a secondary equivalent impedance of (0.06 + 10.30)…

A:

Q: 3. A balanced 3 phase load of 50 KVA, 220 volts at 0.7 leading power factor is supplied by an open…

A: The solution is given below.

Q: A transformer of 500kW output with unity power factor is required to operate for 8 hours at 25%…

A:

Q: Two single phase transformers of 1000 kVA and 500 kVA with equal voltage rating 11 kV/ 400V…

A: Given Two single phase transformers of 1000 KVA and 500 KVA with equal voltage rating 11KV/400 v The…

Q: Two 70 kW single-phase transformers are connected in parallel. The impedances of the first and…

A:

Q: A single phase two winding transformer is rated 20 KVA, 480/120 V at 50 HZ. The equivalent leakage…

A:

Q: A 5 kVA single-phase transformer has a turns ratio of 10:1 and is fed from a 2.5 kV supply.…

A:

Q: b) An ideal transformer is rated at 2400/120V, 9.6kVa, and has 50 turns on the secondary side.…

A:

Q: Two 200/400 V, transformers are operated in parallel to share a load power factor leading.…

A: Conditions for Parallel Operation-           In order that the transformers work satisfactorily in…

Q: . A single-phase transformer is rated at 3 kVA, with 240Vac primary and 120 Vac secondary. The…

A:

Q: 3. A balanced 3 phase load of 50 KVA, 220 volts at 0.8 lagging power factor is supplied by an open…

A:

Q: Two three-phase transformers of equal voltage ratios are operating in parallel. The load draws a…

A: Given: load current IL=200∠-cos-10.9IL=200∠-25.84° AZ1=0.1+j0.3 ΩZ2=0.2+j0.5 Ω

Q: QI-phase step down transformer 1250 KVA, 11000/2200 V, 50 Hz .The resistance /phase and leakage…

A:

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 with share load to their kVA ratings. Rating…

Q: b) Two three-phase 11kV/ 380 V transformers are connected in parallel to serve a load of 36 kVA at…

A: (b) Given, two 3-ph 11kV/380 V transformer are connected in parallel. The total rating or demand of…

Q: Single phase transformer has 24KVA, 2400/240, 50 Hz. Its series impedance Z, 0.15+j0.6pu connected t…

A:

Q: Two 70 kW single-phase transformers are connected in parallel. The impedances of the first and…

A: The Given Two 70kW 1ϕ Transformer are connected in parallel. The 1st and 2nd transformer are 0.6+j6Ω…

Q: A 70 KVA,3-ph,delta/star,50Hz transformer, has number of turns of primary and secondary 660 and 80…

A: Given Pi = 70 KVA, N1 = 660, N2 = 80, primary current = 12 A, power factor = 0.95 Calculating…

Q: 1. Transformer A is rated 75 kVA with equivalent impedance of 6.4 ohms while transformer B is rated…

A:

Q: A 10 kVA, 2400/240V, single phase transformer has the following resistances and leakage reactances:…

A: The solution is given below

Q: 10 kVA, 2400/240-V single-phase transformer has the following resistances and reactances. Find the…

A: The solution can be achieved as follows.

Q: A 10 kVA, 1000/500 V single phase transformer has R1 = 26Ω,X1 =6Ω, R2 = 0.10Ω and X2 = 0.24Ω .…

A:

Q: The impedance of the primary windings of a single-phase transformer with a transformation ratio of 6…

A:

Q: Two single-phase transformers A and B are connected in parallel to serve a 600-A single phase load…

A:

Q: A load of 200 kW at 0.85 power factor is to be shared by two transformers 1 and 2 having the same…

A: In this question we will find load kVA supplied by each transformer......

Q: A load of 200 kW at 0.85 power factor is to pe shared by two transformers A and B aving the same…

A:

Q: iven a conventional single-phase transformer is converted to a step-up autotransformer as shown in…

A: Solution- a) Since 3 phase, 200 KVA so single phase or apparent power of each windings,…

Q: 2. (a) For the following 3-phase transformer, the primary side is given as Y-connection. Draw the…

A: Given primary side of transformer,

Q: A 12 kVA, 58HZ, single-phase transformer has a turns ratio of 18:1 and is supplied from a 2.7 kV…

A: Given N1:N2=18:1V1=2.7kVf=58Hz

Q: Example 31: A 20 kVA, 2000/200V single phase transformer has %R of 2% and %X maintain the load side…

A: Given values are -

Q: 1. Transformer A is rated 75 kVA with equivalent impedance of 6.4 ohms while transformer B is rated…

A: In this question we need to find a KVA load share by transformer A and transformer B.

Q: 33 A 5 kVA single-phase transformer has a turns ratio of 10:1 and is fed from a 2.5 kV supply.…

A: (33) A 5 kVA single phase transformer has,  Turns ratio = 10 : 1  Supply voltage ( primary voltage)…

Q: For the determination of one phase parameters of 20kVA 20000 / 480V, 60Hz transformer Data were…

A: OPEN CIRCUIT TEST:     The objectives of the open-circuit test are: To find out shunt branch…

Q: 2. Given three identical ideal single-phase transformers with each rated at 100KVA and 7kV/3.5kV,…

A:

Q: Consider a 10 KVA, 200/400 V; 50 HZ: single-phase transformer has the following test resalts: O.C.…

A:

Q: A 3-phase transformer, ratio 6.6kV/33, wye/delta, 2 MVA has a primary resistance of 0.08 ohms/phase…

A:

Q: Ql-phase step down transformer 1250 KVA, 11000/2200 V, 50 Hz . The resistance /phase and leakage…

A: Given values are =

Q: 10. A substation delivers 693 kW, 3-phase power at 26.6kV and this power is stepped down  to 2.3 kV…

A: The Power output of a open delta configuration is expressed as, P3ϕ open△ = 3.VpIp Where,  P…

Q: A 10KVA, single-phase transformer has a turns ratio of 12:1 and is supplied from a 2.4 kV supply.…

A: Given values are - S=10kVAN1N2=V1V2=121V1=2.4kV

Q: A 10-kVA, 4800/480-V single-phase transformer has primary and secondary winding parameters of…

A: Given data about a single phase transformer is Rated kVA S=10 kVA. Induced emf ratio is given…

Q: For the following 3-phase transformer, the primary side is given as Y-connection. Draw the secondary…

A: Given 3-phase transformer having primary side in star connection as,

Q: Q3: At the parallel operation of three-phase transformers: a) Give an explanation for the following…

A: (a) The parallel-operation of three-phase transformers: (i) Two-lamps glow-up: This is two bright…

Q: A 10 KVA, single phase transformer has a trunks ratio of 12:1 and is supplied from a 2.4 KV supply.…

A:

Q: A 12 kVA, single-phase transformer has a turns ratio of 14:1 and is supplied from a 2.34 kV supply.…

A:

Q: (b) An ideal transformer is rated at 2400/120V, 9.6kVa, and has 50 turns on the secondaryside.…

A: In this question we will find turn ratio , current rating , primary turns ....

Q: Draw the equivalent circuit of  a 10 KVA, 1940 / 490 V 1-phase transformer with R1=0.35 ohms,…

A: Equivalant resistance seen from primary =primary winding resistance +secondary winding resistance…

Three-Phase Transformers

Three-segment transformers are a type of transformer used to transform voltages of electrical systems into three ranges. Two type transformers are shell-type transformer and core type transformer. In brief, it could be described because of the exquisite kinds of configurations.

Transformer

Ever since electricity has been created, people have started using it in its entirety. We see many types of Transformers in the neighborhoods. Some are smaller in size and some are very large. They are used according to their requirements. Many of us have seen the electrical transformer but they do not know what work they are engaged in.