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How to select the suitable breaker in DC application network?

Selection of a circuit breaker depends essentially on the distribution-system parameters presented below which are used to determine the corresponding characteristics:

1-Type of system - determines the type of product and the number of poles connected in series for each polarity.
2-Rated voltage - determines the number of series poles taking part in current interruption.
3-Nominal current - determines the rated current of the circuit breaker.
4-Maximum short-circuit current at the point of installation - determines the breaking capacity.
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