Need a solu 12.4 A PBX with 200 stations has five trunks to the public network. What is theblocking probability if each station is involved in three external calls per 8-hrworking day with an average duration of 2 min per call? Assume the averagecalling rate is constant during the day (no busy hour) and blocked calls returnwith random retries. What is the offered load? What is the demand traffic?

Step 1: Step 2: Step 3: Step 4:

Answered: 12.4 A PBX with 200 stations has five…

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter5: Transmission Lines: Steady-state Operation

Section: Chapter Questions

Problem 5.14MCQ

See similar textbooks

Similar questions

In Single Busbar System with Bus Sectionalization, any two sections of the Busbar are connected via Circuit Breaker and Isolators. Select one: O True O False
Discrimination (Selectivity or coordination) Problem: Given the below single line diagram where, the red curve is for a PD1 circuit breaker (Upstream). The blue curve is for a PD2 circuit breaker (Down stream) SUPPLY See the following curves to check the discrimination at the red, green and blue arrows (if the fault happened at the downstream PD2) N NOT DISCRIMINATING WITH UPSTREAM DEVICE 4h 2h 1h 30 m 10 m 50 s 8s 5s 25 0,800 s 0.500 s 0.300 s 200s 0.080 s 0.050s 8838: 0.010s 0.0050 s 0.0010s Current (A) The time selectivity between PD1 and PD2 if the fault happens at PD2 for a current rating coincides with green arrow is Select one: O a At = 47seconds 1/20/22, 4:08 PM O b. At = 27seconds Oc. At = 57seconds Od. At = 37seconds O e. None of these Of At = 7seconds Tripping Time
fast
GIVEN: Three-phase System Data: 30 Source ZLine 30 Load Ean Zan = Zbn = Zen = 0.1 + j1.5 n Source: 12020° v; Epn = 1202 – 120° v; Een = 1204120° v (grounded neutral) Line Impedance: Zline a = Zline b Zline c = 1+ j2 N; C Load Impedance: Zab 40 + j30 N; Zbc = 40 – j30 N; Zca = 50 + j0 N %3D %3D
I need the answer as soon as possible
Discuss the method of forming YBUS by inspection, taking a simple example ofsystem with a 5-BUS and 7-Lines. Take half line charging at each node/BUS
I want a solution in less than 30 minutes Often, the network is referred as an infinite bus when a change in input mechanical power or in field excitation to the unit does not cause an appreciable change in a. system frequency or terminal voltage b. Total production cost c. system frequency and terminal voltage d. system frequency alone
The generating set lines L1 and L2 are connected to bus-bar A. L2 is supplied from a powerful system and L1 is supplying an important industrial plant. A fault is detected in CB1; preventing the circuit from opening, explain how the voltage at CB1 can be reduced to zero, so that repair can be carried out, without interrupting the supply to the important industrial plant.
5- What is meant by Present Serviceability Index? How is it calculated?
A final year project student, Raphael, learns in EEE307 that an oscillator circuit with a differential output can be built using single-ended tuned amplifiers like the one shown below: VDD C₁=R4₁ - Vout VinM₁ Fig. 3.1 Single-ended tuned amplifier schematic (image adapted from B. Razavi ©2012)
The economic load dispatch problems deal with
The figure below shows the one-line diagram of a four- bus power system. The voltages, the scheduled real power and reactive powers, and the reactances of transmission lines are marked at this one line diagram (The voltages and reactances are in PU referred to 100 MW base. The active power P2 in MW is the last three digits (from right) of your registration number (i.e for the student that has a registration number 202112396, P2 =396). [10] Starting from an estimated voltage at bus 2, bus 3, and bus 4 equals V2 (0) = 1.15<0°, V3 = 1.15 < 0°, V4 1.1< 0°. 1- Specify the type of each bus and known & unknown quantities at each bus. 2- Find the elements of the second row of the admittance matrix (i.e. [Y21 Y22 Y23 Y24]). 3- Using Gauss-Siedal fınd the voltage at bus 2 after the first iteration. 4- Using Newton-Raphson, calculate: |- The value of real power (P2), at bus 2 after the first iteration. Il- The second element in the first row of the Jacobian matrix after the first iteration. 2 P2…

SEE MORE QUESTIONS

Recommended textbooks for you

Power System Analysis and Design (MindTap Course …

Electrical Engineering

ISBN:

9781305632134

Author:

J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:

Cengage Learning