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In the electrical network shown below, the four relays are closed at a given time It...
Question 4. Consider the electrical circuit depicted below. Current will flow from a to b if...
Question 4. Consider the electrical circuit depicted below. Current will flow from a to b if there is at least one closed path when the relays are switched to "closed". However, the relays may malfunction. Suppose the probability that the three relays depicted below close properly are: Pi = 0.9, P2 = 0.85 and P3 = 0.95, respectively. All relays operate independently of each other and are mutually independent as well. Let A denote the event that current will flow...
4) Consider the switching network shown in Fig. 4. It is equally likely that a switch...
4) Consider the switching network shown in Fig. 4. It is equally likely that a switch will or will not work Find the probability that a closed path will exist between terminals a and b C4 Figure 4
When a relay coil is NOT energized there is an electrical path through the NC contacts...
When a relay coil is NOT energized there is an electrical path through the NC contacts there is an electrical path through the No contacts neither the NO or the NC contacts have an electrical path both the No ans the NC contacts have an electrical path What is a control relay? A remotely operated switch. A device used to release relays internal contact A device to control all relays in a PLC In the SLC 500 system, the main...
Question 1 (20 points: Events, counting, and properties f probabniny Consider the network shown below. There are two kinds of links in the network. Each link of kind o-p +0 fails with probability...
Question 1 (20 points: Events, counting, and properties f probabniny Consider the network shown below. There are two kinds of links in the network. Each link of kind o-p +0 fails with probability p and that of kind O 4+0 fails with probability q. Each link is assumed to fail independently of the other. We say that a path is successful if no link in the path fails. For example, the path S-B-T succeeds if none of the links S...
Consider the communication network shown in the figure below and suppose that each link can fail with probability p. As...
Consider the communication network shown in the figure below and suppose that each link can fail with probability p. Assume that failures of different links are independent Link 1 Link 2 B A Link 5 Link 3 Link 4 1. Assume that p = 1/3. Find the probability that there exists a path from A to Balong which no link has failed. (Give a numerical answer.) 2. Given that exactly one link in the network has failed, find the probability...
can you calculating this question and explain why? thanks A distribution network shown in Figure 3 consists of a 40-MV...
can you calculating this question and explain why? thanks
A distribution network shown in Figure 3 consists of a 40-MVA and 33/22-kV step-down transformer with a reactance of 10% and two distribution lines each having a reactance of 5 Q2. The load connected to each bus is also shown in the figure. The CO-8 overcurrent relays are used to protect the system. The time-current curve of the CO-8 relay is shown in Figure 4 on page 5. Assume that the...
4. (a) What is meant by time grading in protective systems? (b) In FIGURE 1, time graded relays control the circuit breakers. Which will have the shortest delay in operating for a fault at the locatio...
4.
(a) What is meant by time grading in protective systems?
(b) In FIGURE 1, time graded relays control the circuit
breakers. Which
will have the shortest delay in operating for a fault at the
location
shown?
(c) A voltage transformer for use on an 11 kV system has a
star
connected primary. If the turns ratio is 100/1 what will be
the
residual voltage of the open delta winding?
(d) A 1 A electromagnetic relay has 80 turns on...
2. Given the table below (10 pts): A. Draw the project network B. Calculate the expected...
2. Given the table below (10 pts): A. Draw the project network B. Calculate the expected time to complete each activity as well as the variance (or standard deviation) associated with that time C. Determine the time associated with each potential path and denote the critical path D. Given the calculated data, what is the probability of completing the project in 30 days? 35 days? E. If you were to try to improve your performance (in terms of time), what...
I really need help to understand this Stochastic Models problem. Prob.3 In a relay network, the...
I really need help to understand this Stochastic
Models problem.
Prob.3 In a relay network, the relay components are arranged in the configuration shown in the diagram below. Assume that each relay component fails randomly and with probability p. (a) Find the probability that a signal sent from point a arrives at point b successfully. (b) Find the value of p so that the probability that a signal sent from point a arrives at point b successfully is 0.9375. R....
Question 5 (25 Points): The following figure represents an electrical circuit with four switches. Given the...
Question 5 (25 Points): The following figure represents an electrical circuit with four switches. Given the probability of any given switch being on is 50% and all probabilities are independent. What is the probability of making a closed circuit between points A and B? B
Question 4. Consider the electrical circuit depicted below. Current will flow from a to b if there is at least one closed path when the relays are switched to "closed". However, the relays may malfunction. Suppose the probability that the three relays depicted below close properly are: Pi = 0.9, P2 = 0.85 and P3 = 0.95, respectively. All relays operate independently of each other and are mutually independent as well. Let A denote the event that current will flow...
4) Consider the switching network shown in Fig. 4. It is equally likely that a switch will or will not work Find the probability that a closed path will exist between terminals a and b C4 Figure 4
When a relay coil is NOT energized there is an electrical path through the NC contacts there is an electrical path through the No contacts neither the NO or the NC contacts have an electrical path both the No ans the NC contacts have an electrical path What is a control relay? A remotely operated switch. A device used to release relays internal contact A device to control all relays in a PLC In the SLC 500 system, the main...
Question 1 (20 points: Events, counting, and properties f probabniny Consider the network shown below. There are two kinds of links in the network. Each link of kind o-p +0 fails with probability p and that of kind O 4+0 fails with probability q. Each link is assumed to fail independently of the other. We say that a path is successful if no link in the path fails. For example, the path S-B-T succeeds if none of the links S...
Consider the communication network shown in the figure below and suppose that each link can fail with probability p. Assume that failures of different links are independent Link 1 Link 2 B A Link 5 Link 3 Link 4 1. Assume that p = 1/3. Find the probability that there exists a path from A to Balong which no link has failed. (Give a numerical answer.) 2. Given that exactly one link in the network has failed, find the probability...
can you calculating this question and explain why? thanks
A distribution network shown in Figure 3 consists of a 40-MVA and 33/22-kV step-down transformer with a reactance of 10% and two distribution lines each having a reactance of 5 Q2. The load connected to each bus is also shown in the figure. The CO-8 overcurrent relays are used to protect the system. The time-current curve of the CO-8 relay is shown in Figure 4 on page 5. Assume that the...
4.
(a) What is meant by time grading in protective systems?
(b) In FIGURE 1, time graded relays control the circuit
breakers. Which
will have the shortest delay in operating for a fault at the
location
shown?
(c) A voltage transformer for use on an 11 kV system has a
star
connected primary. If the turns ratio is 100/1 what will be
the
residual voltage of the open delta winding?
(d) A 1 A electromagnetic relay has 80 turns on...
2. Given the table below (10 pts): A. Draw the project network B. Calculate the expected time to complete each activity as well as the variance (or standard deviation) associated with that time C. Determine the time associated with each potential path and denote the critical path D. Given the calculated data, what is the probability of completing the project in 30 days? 35 days? E. If you were to try to improve your performance (in terms of time), what...
I really need help to understand this Stochastic
Models problem.
Prob.3 In a relay network, the relay components are arranged in the configuration shown in the diagram below. Assume that each relay component fails randomly and with probability p. (a) Find the probability that a signal sent from point a arrives at point b successfully. (b) Find the value of p so that the probability that a signal sent from point a arrives at point b successfully is 0.9375. R....
Question 5 (25 Points): The following figure represents an electrical circuit with four switches. Given the probability of any given switch being on is 50% and all probabilities are independent. What is the probability of making a closed circuit between points A and B? B
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