Given the following ratings of a single phase three winding transformer: primary winding 300MVA, 14kV secondary winding 300MVA, 200kV tertiary winding 50MVA, 20KV and the leakage reactances from respective short circuit tests as: X12 = 0.1pu based on 300MVA, 14kV X13 = 0.1pu based on 50MVA, 200kV X23 = 0.1pu based on 50MVA, 20kV Estimate the values of the following on a common base of 300MVA: i) X1 ii) X2 iii) X3

Q: Below is a time current curve (TCC), showing the damage curve of a transformer. Draw (roughly),…

A: TCC- Time Current Curve is a plot shows the overcurrent device's interruption time which is based on…

Q: The ratings of a three-phase, three-winding transformer are Primary: Y-connected, 64 kV, 15 MVA…

A: The ratings of a three-phase, three-winding transformer are as follows,Primary: Y-connected, 64 kV,…

Q: The three-phase ratings of a three-winding transformer are: Primary Y-connected, 66 kV, 24 MVA…

A:

Q: A 400/200 volts transformer has pu impedance of 0.05. The HV side voltage required to circulate full…

A: Turns ratio 400/200  i.e. Base voltage for HV, VHV(base)= 400 V Base voltage for LV, VLV(base) = 200…

Q: A short transmission line connects a step-up transformer on the source side with a series impedance…

A: It is given that: VL=17 kVVph=173 kVN1N2=114N3N4=181ZL=0.463+j0.0772 ΩX1=j0.5 ΩR1=50 Ω

Q: find the voltage on primary side in pu.

A: Given that, Primary Voltage (V1)=2000 V, Secondary Voltage (V2)=200 V, Primary Impedance (Z1)=0.12+…

Q: The table below shows some performance parameters of a certain power transformer. Full-load voltage…

A:

Q: Given a 20 kVA, 50 Hz, 2000/200 V single-phase transformer. The parameters of the transformer…

A: Given data 20kVA, 50Hz, 2000/200V transformer R1 = 0.5, R2 = 0.005, X1 = 0.5, X2 = 0.005, Rc = 500…

Q: The table below shows some performance parameters of a certain power transformer. Full-load voltage…

A: The voltage regulator is required to maintain voltages within the permitted range that the…

Q: A short transmission line connects a step-up transformer on the source side with a series impedance…

A: Short Transmission Line: A short transmission line is one with an effective length of less than 80…

Q: Which of the following conditions would be necessary in order for you to use an r-f transformer as a…

A: R-f transformer: An RF transformer is an electromagnetic device that lies between two or more…

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.