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) A 100 MVA generator with 10% reactance and a 200 MVA generator with 8% reactance are connected as shown in figure. Choose the base MVA as 100 MVA. i. If the fault level on bus 1 is limited to be 1500 MVA, calculate value of the reactance of bus bar reactor X. ii. Calculate fault MVA at bus 2. iii. Calculate MVA rating of circuit breaker C. 100 MVA 200 MVA 10% 8% Bus 1 Bus 2 Feeder 15% ON 100 MVA BASE Load?
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) A 100 MVA generator with 10% reactance and a 200 MVA generator with ...

b Calculations for Bus 1:
- Given that the fault level on bus 1 is limited to 1500 MVA
- Let the reactance of the bus bar reactor X be Xpu on a 100 MVA base
- Xpu = X/(100^2) = X/10000

b Calculation for X:
- The fault level at bus 1 is limited to 1500 MVA
- Xpu = (1500 - 100)/(100^2) = 14/10000
- X = 10000 * 0.0014 = 14 Ω

b Calculations for Bus 2:
- Fault MVA at bus 2 can be calculated using the reactance of the 200 MVA generator
- Xpu = 8/(200^2) = 8/40000 = 0.0002
- Fault MVA at bus 2 = Xpu * 100^2 = 0.0002 * 10000 = 2 MVA

b Calculation for Circuit Breaker C:
- The fault MVA at bus 2 is 2 MVA
- The feeder has a reactance of 15%
- Total fault MVA at bus 2 = 2/(1-0.15) = 2/0.85 = 2.35 MVA
- MVA rating of circuit breaker C should be greater than 2.35 MVA

b Conclusion:
- The value of the reactance of the bus bar reactor X is 14 Ω
- The fault MVA at bus 2 is 2 MVA
- The MVA rating of circuit breaker C should be greater than 2.35 MVA to handle the fault level at bus 2.
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) A 100 MVA generator with 10% reactance and a 200 MVA generator with 8% reactance are connected as shown in figure. Choose the base MVA as 100 MVA. i. If the fault level on bus 1 is limited to be 1500 MVA, calculate value of the reactance of bus bar reactor X. ii. Calculate fault MVA at bus 2. iii. Calculate MVA rating of circuit breaker C. 100 MVA 200 MVA 10% 8% Bus 1 Bus 2 Feeder 15% ON 100 MVA BASE Load?
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) A 100 MVA generator with 10% reactance and a 200 MVA generator with 8% reactance are connected as shown in figure. Choose the base MVA as 100 MVA. i. If the fault level on bus 1 is limited to be 1500 MVA, calculate value of the reactance of bus bar reactor X. ii. Calculate fault MVA at bus 2. iii. Calculate MVA rating of circuit breaker C. 100 MVA 200 MVA 10% 8% Bus 1 Bus 2 Feeder 15% ON 100 MVA BASE Load? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about ) A 100 MVA generator with 10% reactance and a 200 MVA generator with 8% reactance are connected as shown in figure. Choose the base MVA as 100 MVA. i. If the fault level on bus 1 is limited to be 1500 MVA, calculate value of the reactance of bus bar reactor X. ii. Calculate fault MVA at bus 2. iii. Calculate MVA rating of circuit breaker C. 100 MVA 200 MVA 10% 8% Bus 1 Bus 2 Feeder 15% ON 100 MVA BASE Load? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for ) A 100 MVA generator with 10% reactance and a 200 MVA generator with 8% reactance are connected as shown in figure. Choose the base MVA as 100 MVA. i. If the fault level on bus 1 is limited to be 1500 MVA, calculate value of the reactance of bus bar reactor X. ii. Calculate fault MVA at bus 2. iii. Calculate MVA rating of circuit breaker C. 100 MVA 200 MVA 10% 8% Bus 1 Bus 2 Feeder 15% ON 100 MVA BASE Load?.
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