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Which is circuit interrupting device?
Switch
Fuse
Circuit breaker
All of above
All of above
A circuit interrupting device is any component designed to break the flow of current in an electrical circuit, either manually, automatically, or upon detecting a fault. Switches, fuses, and circuit breakers all perform this primary function, albeit through different mechanisms and for varying duty cycles.
A circuit interrupting device is any component designed to break the flow of current in an electrical circuit, either manually, automatically, or upon detecting a fault. Switches, fuses, and circuit breakers all perform this primary function, albeit through different mechanisms and for varying duty cycles.
Q=тИл0tтАЛi2Rdt тАФ Heat energy produced in a fuse leading to interruption
IarcтАЛ=RarcтАЛVтИТVarcтАЛтАЛ тАФ Current behavior during the interruption arc phase
A switch is a non-automatic interrupting device used for load break.
A fuse is a single-use, sacrificial protective device.
A circuit breaker is a reusable device capable of making and breaking circuits under both normal and fault conditions.
Enhances system reliability
Protects equipment from thermal and mechanical damage
Risk of arc formation during disconnection
Complexity in arc quenching for high-voltage breakers
Residential distribution panels
Industrial power grids
Transmission substations
| Feature | Circuit Breaker | Fuse |
|---|---|---|
Reusability | Yes | No |
Automation | Manual | Automatic |
Interrupting capacity is the maximum fault current a breaker can handle without damage.
Switches are generally not rated for breaking large fault currents unless specifically designed as load-break switches.
D is correct тАФ All listed devices serve the fundamental purpose of interrupting current flow in electrical circuits.
Always remember that while all these interrupt current, only circuit breakers and fuses provide automatic fault protection; switches are primarily for operational control.