Protection / OCPD

Breaker & fuse sizing · Ib ≤ In ≤ Iz · I²t adiabatic check

Design Current Ib (A)

Cable Ampacity Iz (A)

Breaker Rating In (A)

Fault Current (kA)

Clearing Time (s)

k factor (Cu/PVC=115, Cu/XLPE=143)

Conductor Size S (mm²)

Breaker Status

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Coordination Chain

Ib ≤ In—

In ≤ Iz—

I²t ≤ k²S²—

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