MCCB Cascading and Back-up Protection Explained
How current-limiting upstream MCCBs let downstream breakers use a lower breaking capacity via IEC 60947-2 cascading, and where it trades off against discrimination.
9 min read
Technical
Protection guides
Guides and notes on industrial electrical and automation parts: selection, wiring, settings and ordering.
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How to Set MCCB Trip Settings (Ir, Isd, Ii)
How to derive Ir, Isd/tsd, and Ii settings on an MCCB electronic trip unit for correct overload protection and breaker selectivity.
11 min read
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