Engineering, 17.06.2021 21:00, Senica
A distance relaying system utilizing a CT with a turns ratio of 500:5 and a PT with a turns ratio of 20KV:69.3V. The lines AB and BC shown in Fig. has an impedance of (0.03+j0.4)2/Km, the lengths of lines AB and BC are100)Km and 80 Km. a) Find each zone settings of both relays Rab and Rbc then find the response times of main and backup protection for a symmetrical short circuit at 90% of line BC. b) What difference will happen in the tripping time of both relays if the fault occurred through an impedance of (1.2+j20)2 (A4) (10 Marks) B 801e m Rab 100 km Rbc Fig.1
Answers: 3
Other questions on the subject: Engineering
Engineering, 04.07.2019 18:10, lillygrl100
For the closed feedwater heater below, feedwater enters state 3 at a pressure of 2000 psia and temperature of 420 °f at a rate of ix10 ibhr. the feedwat extracted steam enters state 1 at a pressure of 1000 psia and enthalpy of 1500 btu/lbm. the extracted er leaves at an enthalpy of 528.7 btu/lbm steam leaves as a saturated liquid. (16) a) determine the mass flow rate of the extraction steam used to heat the feedwater (10) b) determine the terminal temperature difference of the closed feedwater heater
Answers: 3
Engineering, 04.07.2019 18:20, ashleyjaslin
Derive the correction factor formula for conical nozzle i=-(1+ cosa) and calculate the nozzle angle correction factor for a nozzle whose divergence hal-fangle is 13 (hint: assume that all the mass flow originates at the apex of the cone.
Answers: 3
Engineering, 04.07.2019 18:20, moneywaydaedae
Air is compressed isentropically from an initial state of 300 k and 101 kpa to a final temperature of 1000 k. determine the final pressure using the following approaches: (a) approximate analysis (using properties at the average temperature) (b) exact analysis
Answers: 1
Do you know the correct answer?
A distance relaying system utilizing a CT with a turns ratio of 500:5 and a PT with a turns ratio of...
Questions in other subjects:
Spanish, 30.03.2020 19:04
