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Cascading Information

Cascading is the use of the current limiting capacity of circuit breakers at a given
point to permit installation of lower-rated and therefore lower-cost circuit breakers
downstream.

The upstream Compact circuit breakers acts as a barrier against short-circuit
currents. In this way, downstream circuit breakers with lower breaking capacities
than the prospective short-circuit (at their point of installation) operate under their
normal breaking conditions.

Since the current is limited throughout the circuit controlled by the limiting circuit
breaker, cascading applies to all switchgear downstream. It is not restricted to two
consecutive devices.
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