A 50 MVA 230/115-kV, Δ-Y three-phase connected power transformer has a per unit resistance of 0.015 pu and a per-unit reactance of 0.006 pu. The excitation branch elements are RC = 125 pu and XM = 20 pu. What is the equivalent branch resistance, RC, in kΩ referred to the low-voltage side?

Q: In an experiment for determining the breakdown strength of transformer oil with standard electrodes,…

A:

Q: -kVA, 11/2.3 kV, 60 Hz transformer has been tested and gives the following  open circuit test data:…

A:

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

A:

Q: The operated distfibution transformer has constant iron * and copper losses? False True

A: the operated distribution  transformer has constant iron and copper losses true or false

Q: ngle phase transformer has arated secondary voltage of (230v).when Loaded by a purely inductive load…

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

Q: B. A 10-kVA, 2300/230-V transformer is to be tested to determine its excitation branch components,…

A: Given :  kva = 10  V base= 2300 Voc= 2300 v Ioc= 0.2 A Poc= 40 w Vsc= 48 v Isc= 5 A Psc= 180 w

Q: A 12 kVA, 58HZ, single-phase transformer has a turns ratio of 10:1 and is supplied from a 2.8 kV…

A: Dear student as per our guidelines we are supposed to solve only one question in which it should…

Q: A l-phase, 10-kVA, 500/250-V, 50-Hz transformer has the following constants: Reactance : primary 0.2…

A: In this question,  We need to determine the reading of the instrument for the open circuit test and…

Q: apparent power: 15 kVA, primary:500 V, secondary: 220 V, 50 Hz, idle running current: %7 Idle lost…

A: TRANSFORMER: Transformer is a static device which transfers power from one circuit to another…

Q: 3. A 100 KVA, 4000V / 200V, 50 Hz single phase transformer has 100 secondary tu Determine (a) the…

A: In this question , we will find currents in both windings , turn and maximum flux..

Q: A single-phase 100 kVA, 2400/240 V, two-winding transformer will be used as a step-down…

A: single-phase Two winding transformer step down  100 kVA, 2400/240 V,  auto-transformer Step down…

Q: 55 V / 220 V, 50 Hz single phase transformer, high voltage (secondary) windings are left idle and…

A: Winding resistance of the secondary referred to the primary, R2'=0.015 Ω

Q: A 3000V/4400V, single-phase transformer takes a no-load current of 0.5A and the iron loss is 200W.…

A: We will solve this question by using the no-loaad conditions of the transformer.

Q: 3.16 A single-phase, 50-k VA, 2400/240-V, 60-Hz distribution transformer has the following…

A: It is given that:

Q: Q1) I. A 100 kVA, three-phase ideal transformer has 4950 turns on the pr imary and 180 turns on the…

A:

Q: Q.2 (a) Give TWO reasons why we must use transformer in electrical system. (b) A single-phase…

A: a) To reduce transmission line losses, transformers are utilised to boost up the input voltage.…

Q: a step-down transformer of 23 kVA, 2300 V / 230 V, 50 Hz, R1 = 4 Ω, X1 = 12 Ω, R2 = 0.04 Ω, X2 =…

A: a)  Calculate the rated current by substituting the values of V=230 V, P=23 kVA in the power…

Q: a. Find the full-load regulation of this transformer at a power factor of 0.8 lagging. b. Find the…

A:

Q: Two 11,000/2,200-V, 1-phase transformers are connected in parallel to supply a total load of 200 at…

A: (1) (a) Current supplied by each transformer The equivalent circuit diagram of two transformers…

Q: A 50 MVA 230/115-kV, A-Y three-phase connected power transformer has a per unit resistance of 0.015…

A: Need to find the excitation branch element Rc on the low voltage side solve as below

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

A: (i) The per-phase secondary voltage in the star-connected secondary winding can be calculated as,

Q: A 10 kVA, 2300/230-V single-phase transformer has the following resistances and reactances. Find the…

A:

Q: A 263-V: 39-kV, 50-Hz, 78 kVA transformer has a magnetizing reactance (as measured from the 230+n-V…

A:

Q: 1. A 11000/230V, 150KVA, 50 Hz single phase transformer has core loss of 1.4kW and full load copper…

A:

Q: Q1-A 3-phase step down transformer 1200 KVA , 11000/2200 V, 50 Hz .The resistance /phase and leakage…

A:

Q: A single phase, 250 kVA, 10kV/2kV 60 Hz transformer has the following equivalent circuit parameters…

A: Given  Single phase transformer   250 KVA,10 Kv/2Kv 60 HzRc(HV)=60.2 kΩ     Xm(HV)=18.44…

Q: A 200V/100v,50HZ transformer has magnetizing reactance Xm=400ohms and resistance representing core…

A:

Q: A 10 MVA, 115 kV/25 kV, 60 Hz, Y-A connected, three-phase power transformer has an equivalent series…

A: Given: A 10 MVA, 115 kV/25 kV, 60 Hz, Y-Δ connected, three-phase power transformer has Equivalent…

Q: A 50Hz, single phase transformer has a ratio of N2:N1 = 0.2. On full-load, the secondary current is…

A: On the transformer primary side a resistance of 0.8ohm and reactance of 4 ohm is connected while on…

Q: Task 1 The three-phase transformer has following rated data: SN=160 kVA (rated apparent power),…

A: Open circuit test: This test is carried out on the low voltage side and determines the no-load…

Q: A three-phase 50 Hz, 200 MVA, 220/66 kV transformer has a clock number of Yd11. The transformer…

A: We are authorized to answer three subparts at a time. Since you have not mentioned which part you…

Q: C2 (i). Draw the Schematic diagram and explain the working of LVDT and write any two applications of…

A: LVDT It is Linear variable differential transformer It is a passive type sensor. It is an…

Q: A 16 kVA, 58Hz, single - phase transformer has a turns ratio of 14: 2 and is supplied from a 2.7 kV…

A:

Q: 2. The effective primary and secondary resistances of a 500 kVA, 12,000/2400 volt 60 cycle…

A:

Q: Ql-phase step down transformer 1250 KVA, 10002200 V, 50 Hz The resistance /phase and leakage…

A:

Q: A 15-kVA, 2400/240-V transformer is to be tested to determine its excitation branch components, its…

A: Solutiongiven that ,Rated KVA=15KVAVoltage rating =2400/240VOpen circuit…

Q: The eddy current and hysteresis losses of a 4400-V, 60-Hz, 10 distributio transformer are 280 W and…

A:

Q: 4- A 4KVA, 200/400V, 50HZ, single phase transformer gave the following test figures: No-load…

A:

Q: Answer by true or false * True False The secondary winding of current transformer should be a large…

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

Q: The nameplate on a 25-MVA, 60-Hz single-phase transformer indicates that it has a voltage rating of…

A: The transformer is a static device that transfers power from one circuit to another circuit without…

Q: Q1) The equivalent circuit impedances of a 20-kVA, 8000/240 V, 60-Hz transformer are to be…

A:

Q: The core of a 30, 50-Hz, 11000/550-V, A-Y, 300 kVA, core-type transformer operates with a flux of…

A: In this question we will find full load high voltage phase current....

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

A:

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

A: Given values are =

Q: A single-phase transformer 11000/420 V, 50 kVA, 50 Hz has resistance and leakage reactance as…

A:

Q: Solved Problems: Single-Phase Transformers Problem 1 A 19.2 KVA, 19200/480-V, 60 Hz, single-phase…

A:

Q: A 5 KVA 220/110 transformer has the following parameters. Ri -0.25Ω , Χ -0.75Ω, Reι -720 Ω , Xm1-180…

A:

Q: 4. A single-phase, 1000-kVA, 2400/8000-V, 60HZ distribution transformer has the following…

A: There are two questions in the given image. We will be able to answer only the 1st question.

Distribution System

The final stage in the delivery of the electric power is the electric power distribution system. From the transmission system to the individual customers it carries electricity. The distribution system is connected with the transmission system and is used to lower the voltage of the transmission to medium voltage in the range of 2 kV to 35 kV with the help of transformers. This medium voltage to the distribution transformers located near the customer's premises is carried by the primary distribution system lines. These distribution transformers in turn lower the voltage to utilization voltage used in lightings, household appliances, industrial equipments etc. Through secondary distribution lines often several customers are supplied from one transformer. It is through service drops, the commercial and residential customers are connected to the secondary distribution system lines. Customers who demand a larger amount of power can be connected directly to the primary distribution system level or the sub-transmission level.