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A shunt resistor is connected across the contacts of a circuit breaker to:
- a)Damp out the restriking transients
- b)Bypass the arc current
- c)Limit the short circuit current
- d)Reduce the damage to contacts due to arcing
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
A shunt resistor is connected across the contacts of a circuit breake...
- It is a method adopted for dampening the over-voltage transients due to current chopping.
- In this method, a shunt resistance is connected across the contacts of the circuit breaker.
- It reduces the rate of rising of re-striking voltage and the peak value of re-striking voltage.
- It helps to reduce the transient voltage surge during current chopping and capacitive current breaking.
Most Upvoted Answer
A shunt resistor is connected across the contacts of a circuit breake...
- It is a method adopted for dampening the over-voltage transients due to current chopping.
- In this method, a shunt resistance is connected across the contacts of the circuit breaker.
- It reduces the rate of rising of re-striking voltage and the peak value of re-striking voltage.
- It helps to reduce the transient voltage surge during current chopping and capacitive current breaking.
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A shunt resistor is connected across the contacts of a circuit breake...
Damping out restriking transients
A shunt resistor is connected across the contacts of a circuit breaker to damp out restriking transients. Restriking transients are high-frequency oscillations that occur when the circuit breaker interrupts the current flow through the contacts. These transients can cause damage to the contacts and other components of the circuit.
Restriking transients
When a circuit breaker interrupts the current flow, an arc is formed between the contacts due to the ionization of the air. This arc continues to conduct current until the current zero crossing point is reached, at which point the arc is extinguished. However, during this process, restriking transients are generated.
These transients are caused by the rapid change in the current and voltage across the contacts. They can result in high-frequency oscillations that can lead to overvoltages and overcurrents. These overvoltages and overcurrents can cause damage to the contacts and other components of the circuit.
Shunt resistor
A shunt resistor is connected across the contacts of the circuit breaker in parallel. This resistor provides a low-impedance path for the restriking transients to flow through. By providing a low-impedance path, the shunt resistor helps to dampen out the transients and prevent them from causing damage to the contacts.
Damping effect
When the restriking transients occur, a portion of the current flows through the shunt resistor instead of passing through the contacts. This reduces the magnitude of the transients and helps to dampen out the oscillations.
Benefits
The use of a shunt resistor in a circuit breaker provides several benefits:
1. It helps to protect the contacts from damage caused by restriking transients.
2. It reduces the stress on the circuit breaker and other components of the circuit.
3. It improves the overall reliability and performance of the circuit breaker.
In conclusion, a shunt resistor is connected across the contacts of a circuit breaker to damp out restriking transients. This helps to protect the contacts and other components from damage caused by high-frequency oscillations.
A shunt resistor is connected across the contacts of a circuit breaker to damp out restriking transients. Restriking transients are high-frequency oscillations that occur when the circuit breaker interrupts the current flow through the contacts. These transients can cause damage to the contacts and other components of the circuit.
Restriking transients
When a circuit breaker interrupts the current flow, an arc is formed between the contacts due to the ionization of the air. This arc continues to conduct current until the current zero crossing point is reached, at which point the arc is extinguished. However, during this process, restriking transients are generated.
These transients are caused by the rapid change in the current and voltage across the contacts. They can result in high-frequency oscillations that can lead to overvoltages and overcurrents. These overvoltages and overcurrents can cause damage to the contacts and other components of the circuit.
Shunt resistor
A shunt resistor is connected across the contacts of the circuit breaker in parallel. This resistor provides a low-impedance path for the restriking transients to flow through. By providing a low-impedance path, the shunt resistor helps to dampen out the transients and prevent them from causing damage to the contacts.
Damping effect
When the restriking transients occur, a portion of the current flows through the shunt resistor instead of passing through the contacts. This reduces the magnitude of the transients and helps to dampen out the oscillations.
Benefits
The use of a shunt resistor in a circuit breaker provides several benefits:
1. It helps to protect the contacts from damage caused by restriking transients.
2. It reduces the stress on the circuit breaker and other components of the circuit.
3. It improves the overall reliability and performance of the circuit breaker.
In conclusion, a shunt resistor is connected across the contacts of a circuit breaker to damp out restriking transients. This helps to protect the contacts and other components from damage caused by high-frequency oscillations.
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A shunt resistor is connected across the contacts of a circuit breaker to:a)Damp out the restriking transientsb)Bypass the arc currentc)Limit the short circuit currentd)Reduce the damage to contacts due to arcingCorrect answer is option 'A'. Can you explain this answer?
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A shunt resistor is connected across the contacts of a circuit breaker to:a)Damp out the restriking transientsb)Bypass the arc currentc)Limit the short circuit currentd)Reduce the damage to contacts due to arcingCorrect answer is option 'A'. Can you explain this answer? for Railways 2024 is part of Railways preparation. The Question and answers have been prepared according to the Railways exam syllabus. Information about A shunt resistor is connected across the contacts of a circuit breaker to:a)Damp out the restriking transientsb)Bypass the arc currentc)Limit the short circuit currentd)Reduce the damage to contacts due to arcingCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Railways 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A shunt resistor is connected across the contacts of a circuit breaker to:a)Damp out the restriking transientsb)Bypass the arc currentc)Limit the short circuit currentd)Reduce the damage to contacts due to arcingCorrect answer is option 'A'. Can you explain this answer?.
A shunt resistor is connected across the contacts of a circuit breaker to:a)Damp out the restriking transientsb)Bypass the arc currentc)Limit the short circuit currentd)Reduce the damage to contacts due to arcingCorrect answer is option 'A'. Can you explain this answer? for Railways 2024 is part of Railways preparation. The Question and answers have been prepared according to the Railways exam syllabus. Information about A shunt resistor is connected across the contacts of a circuit breaker to:a)Damp out the restriking transientsb)Bypass the arc currentc)Limit the short circuit currentd)Reduce the damage to contacts due to arcingCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Railways 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A shunt resistor is connected across the contacts of a circuit breaker to:a)Damp out the restriking transientsb)Bypass the arc currentc)Limit the short circuit currentd)Reduce the damage to contacts due to arcingCorrect answer is option 'A'. Can you explain this answer?.
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A shunt resistor is connected across the contacts of a circuit breaker to:a)Damp out the restriking transientsb)Bypass the arc currentc)Limit the short circuit currentd)Reduce the damage to contacts due to arcingCorrect answer is option 'A'. Can you explain this answer?, a detailed solution for A shunt resistor is connected across the contacts of a circuit breaker to:a)Damp out the restriking transientsb)Bypass the arc currentc)Limit the short circuit currentd)Reduce the damage to contacts due to arcingCorrect answer is option 'A'. Can you explain this answer? has been provided alongside types of A shunt resistor is connected across the contacts of a circuit breaker to:a)Damp out the restriking transientsb)Bypass the arc currentc)Limit the short circuit currentd)Reduce the damage to contacts due to arcingCorrect answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
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