Question
Explain whether the RCCB in Figure 2 would trip if a Live to Neutral fault
occurs.
occurs.
Ask by Cummings Goodwin. in Singapore
Dec 09,2024
Upstudy AI Solution
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Answer
The RCCB would trip in a Live to Neutral fault because it detects and trips on current imbalances between the live and neutral conductors.
Solution
To determine whether the RCCB (Residual Current Circuit Breaker) in Figure 2 would trip in the event of a Live to Neutral fault, we need to consider the characteristics of RCCBs and the nature of a Live to Neutral fault.
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RCCB Characteristics:
- RCCBs are designed to trip when there is a difference in current between the live and neutral conductors, indicating a fault or leakage current.
- RCCBs have a set trip current, which is the current at which they will trip to protect against faults or leakage currents.
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Live to Neutral Fault:
- A Live to Neutral fault occurs when there is a fault between the live conductor and the neutral conductor, causing a current imbalance between the two conductors.
- In this fault, the current in the live conductor is higher than the current in the neutral conductor, leading to a difference in current between the two conductors.
Based on the characteristics of RCCBs and the nature of a Live to Neutral fault, the RCCB in Figure 2 would trip if a Live to Neutral fault occurs. This is because the RCCB is designed to detect and trip when there is a difference in current between the live and neutral conductors, which is exactly what happens in a Live to Neutral fault.
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Simplify this solution The Deep Dive
The RCCB (Residual Current Circuit Breaker) is designed to detect imbalances between live and neutral currents. In the event of a Live to Neutral fault, where current flows directly from the live wire to neutral, the RCCB would not trip, as the current would be balanced, causing no differential current to be detected. It’s like a tightrope walker maintaining balance—if they don’t wobble, they don’t fall!
However, remember that if the fault leads to a leakage current (for example, if a person comes into contact with the live wire), the RCCB will trip to protect against electric shock. So, while a direct Live to Neutral short won’t trigger it, dangerous situations that create imbalance will certainly set it off!
