MCB breaker VS Fuse, Difference between Fuse and MCB in Details (in Hindi)

Summary

This video compares fuses and Miniature Circuit Breakers (MCBs), highlighting their differences across 11 key points. It covers aspects such as protection functions, cost, current ratings, and tripping mechanisms. Fuses provide basic overload and short circuit protection but must be replaced when tripped, whereas MCBs can be reset and offer faster response times. The discussion also touches on user-friendliness, safety during operation, and ampere ratings, emphasizing that while both devices serve to protect circuits, MCBs are generally more efficient and versatile. Viewers are encouraged to learn more and engage with the content.

Takeaways

• 😀 Both fuses and MCBs (Miniature Circuit Breakers) provide protection against overload and short circuits.
• 💰 Fuses are significantly cheaper than MCBs, making them a cost-effective option for basic protection.
• 🔌 Fuses are available in a wider range of ratings (1A to 1000A), while MCBs typically range from 2A to 200A.
• 🔄 A blown fuse must be replaced, but an MCB can simply be reset after it trips.
• ⏱️ Fuses trip very quickly, within 20 milliseconds, compared to MCBs, which take between 20 to 500 milliseconds.
• ⚡ Fuses are less sensitive to overloads, while MCBs react more quickly to overload situations.
• 🔍 Fuses do not provide any indication when they have blown, whereas MCBs usually have indicators to show their operational status.
• 🚦 MCBs can be easily switched on and off, while fuses require removal for switching, which can be inconvenient.
• 🛡️ MCBs are safer to operate as they do not produce sparks when being switched, unlike fuses.
• 🔋 MCBs have higher ampere ratings, making them suitable for higher load applications compared to fuses.

Q & A

What are the primary functions of fuses and MCBs?

Both fuses and MCBs provide overcurrent and short circuit protection. However, fuses are mainly used for short circuit protection, while MCBs can also protect against overloads.

How do the costs of fuses and MCBs compare?

Fuses are significantly cheaper, costing around 15-20 rupees for a 10 amp fuse, while MCBs can cost between 300-400 rupees for the same rating.

What is the range of ratings available for fuses and MCBs?

Fuses are available in a wide range, from 1 amp to 1000 amps, whereas MCBs generally range from 2 amps to 200 amps.

What happens when a fuse trips compared to when an MCB trips?

When a fuse trips due to a fault, it must be replaced. In contrast, if an MCB trips, it can be reset and reused after fixing the underlying issue.

How quickly do fuses and MCBs trip in the event of a short circuit?

Fuses typically trip within 20 milliseconds, while MCBs can take longer, anywhere from 20 to 500 milliseconds depending on the current.

Which device is more sensitive to overload conditions?

MCBs are more sensitive to overload conditions compared to fuses, which may take longer to trip under similar circumstances.

Do fuses provide any indication of their status when they trip?

No, fuses do not have any status indicators, making it difficult to know if they have tripped. MCBs, on the other hand, usually have indicators showing their operational status.

Can fuses be used as switches in a circuit?

No, fuses cannot be used as switches because removing them interrupts the circuit entirely. MCBs can function as switches, allowing for easier control.

What are the safety considerations when handling fuses?

Handling fuses can be risky as they may produce sparks when being replaced. MCBs are safer to operate as they can be used without the risk of sparks.

How do the interrupting capacities of fuses and MCBs compare?

Fuses can handle higher current ratings, potentially up to 10,000 amps during short circuit conditions, while MCBs have lower interrupting capacities.