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A circuit breaker is like an automatic switch, designed to break a circuit if the current flowing (measured in amps) exceeds a predetermined maximum amount. The frequency at which the alternating current is changing is not relevant provided it is the normal one for which the circuit breaker has been designed to operate. In USA, Canada and other countries using similar power supply standards, that frequency is 60 Hz. In Europe and other world areas using similar power supply standards, that frequency is 50 Hz. A circuit breaker designed for use on 50 Hz or 60 Hz supplies should not be used to protect a circuit in a ship or aircraft running on a 400 Hz supply because its magnetic and capacitive components may not operate correctly. For such applications a circuit breaker designed to operate at 400 Hz must be used.

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βˆ™ 15y ago
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βˆ™ 6mo ago

A breaker can work on both 60Hz and 50Hz supplies because the internal mechanical and electrical components are designed to operate within the range of frequencies encountered in different electrical systems. The design and construction of the breaker are optimized to handle varying frequencies without impacting its functionality or performance.

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Q: How can a breaker work on 60Hz and 50 Hz supplies?
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