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In a ring distribution system, if one section of the ring experiences a fault and is disconnected, how does this affect the voltage drop at the loads connected to the remaining operational sections?

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RRB JE EE 22 Apr 2025 Shift 2 CBT 2 Official Paper
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  1. Voltage drop fluctuates randomly due to load redistribution. 
  2. Voltage drops decreases as the fault reduces overall system impedance.
  3. Voltage drop remains unchanged since power is still supplied from two directions.
  4. Voltage drops increases because the system now operates like a radial system in that section. 

Answer (Detailed Solution Below)

Option 3 : Voltage drop remains unchanged since power is still supplied from two directions.
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Ring distribution system

qImage68186810766b127f38e86a51

  • A ring distribution system is an electrical power distribution network where feeders connect in a closed loop, providing multiple paths for power delivery.
  • This design ensures that if one feeder fails, power can continue to flow through an alternative path, maintaining reliability and preventing power outages.
  • There are fewer voltage fluctuations at the consumer's terminal.
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More Short Circuit Capacity Questions

Q1.In a ring distribution system, if one section of the ring experiences a fault and is disconnected, how does this affect the voltage drop at the loads connected to the remaining operational sections?
Q2.With reference to line protection, state True/False for the following statements: 1. In the event of a short circuit, the circuit breaker closest to the fault should open. 2. The relay operating time should be as large as possible.
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More Fault Analysis Questions

Q1.In a ring distribution system, if one section of the ring experiences a fault and is disconnected, how does this affect the voltage drop at the loads connected to the remaining operational sections?
Q2.Which of the following is a common internal fault in transformers?
Q3.With reference to line protection, state True/False for the following statements: 1. In the event of a short circuit, the circuit breaker closest to the fault should open. 2. The relay operating time should be as large as possible.
Q4.State True/False for the following statements with reference to commutation of SCRs: 1. Class D commutation is a complementary commutation. 2. Class F commutation is a natural commutation.
Q5.State True/False for the following statements, with reference to overload and short circuit in power systems: 1. The voltage at the overload point may be low, but not zero. 2. The currents in the overloaded equipment are substantially lower than that in the case of a short-circuit.
Q6.Most of the faults in the power system are mainly due to:
Q7. For analysing long transmission lines, identify from the list those that are considered shunt elements. 1. Line resistance 2. Line inductive reactance 3. Line leakage susceptance 4. Line leakage conductance
Q8.For the incipient type of fault in transformers, what is the most common type of protection used?
Q9.A fault occurring at the terminals of an unloaded AC generator operating at its rated voltage has resulted in the following sequence currents and voltages. What is the type of fault? Positive sequence current = j 3 p.u Negative sequence current = -5.5 p.u Zero sequence current = j 2.5 p.u Positive sequence voltage = 2 p.u Negative sequence voltage = 2 p.u Zero sequence voltage = 2 p.u
Q10.______ can be defined as an abnormal connection of very low impedance between two points of different potential, whether made intentionally or accidentally.
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