BTS ET Circuit Breaker Mechanism Revision

What is the main role of a circuit breaker in an electrical circuit?

• Protect the electrical circuit against overloads and short circuits.

• Improve the energy efficiency of the electrical circuit

• Control the temperature of the electrical circuit

• Provide a constant power supply

Describe the operation of a circuit breaker in case of electrical overload.

• The circuit breaker amplifies the electrical load for better performance

• The circuit breaker transforms electricity into thermal energy in case of overload

• The circuit breaker emits a sound signal to warn of electrical overload

• The circuit breaker automatically cuts off the power supply in case of overload to prevent the risk of fire or damage to electrical appliances.

What is the difference between a thermal circuit breaker and a magnetic-thermal circuit breaker?

• What is the difference between a thermal circuit breaker and a magnetic-thermal circuit breaker?

• A thermal circuit breaker protects only against current overloads

• A thermal circuit breaker protects against short circuits only

• The two types of circuit breakers work in the same way

• The difference is that the thermal circuit breaker protects against current overloads based on generated heat, while the magnetic-thermal circuit breaker protects against overloads and short circuits by using both thermal and magnetic elements.

Explain how a circuit breaker detects overcurrents in a circuit.

• The circuit breaker detects overcurrents by monitoring the current and automatically cutting off the circuit in case of overload.

• The circuit breaker detects overcurrents by monitoring the electrical frequency and adjusting the circuit resistance.

• The circuit breaker detects overcurrents by measuring the voltage and automatically adjusting the current.

• The circuit breaker detects overcurrents by analyzing the circuit temperature and triggering a sound alarm.

What are the advantages of using a circuit breaker compared to a fuse?

• Fuses are easier to reset than circuit breakers

• The advantages of using a circuit breaker over a fuse are the ability to reset it after tripping and better protection against overloads and short circuits.

• Circuit breakers are less reliable than fuses

• Fuses provide better protection against overloads than circuit breakers

What are the steps of the circuit breaker tripping process?

• Detection, Deactivation, Opening of contacts

• Detection, Closing of contacts, Activation

• Detection, Activation, Opening of contacts

• Detection, Short circuit, Activation

What is the function of resetting a circuit breaker?

• The function of resetting a circuit breaker is to control energy consumption

• The function of resetting a circuit breaker is to regulate electrical voltage

• The function of resetting a circuit breaker is to cut off the power supply

• The function of resetting a circuit breaker is to restart the circuit breaker after it has tripped.

Why is it important to choose the right circuit breaker size for a specific circuit?

• To make the circuit more aesthetic

• To save money

• To avoid electrical overload, fire risk, and damage to electrical appliances.

• To increase energy consumption

How does a circuit breaker protect electrical appliances from short circuits?

• How does a circuit breaker protect electrical appliances from short circuits?

• By reducing the circuit's resistance

• By adding more electrical appliances to the circuit

• By increasing the electrical voltage

• By detecting an overload of current and immediately interrupting the circuit.

What are the different types of circuit breakers used in electrical installations?

• static circuit breaker

• divisional circuit breaker, differential circuit breaker, thermal-magnetic circuit breaker, thermal circuit breaker, magnetic circuit breaker

• electronic circuit breaker

• electromagnetic circuit breaker