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Fault Scenario Simulator

3Φ · L-L · L-G · L-L-G faults · Click any bus · Watch breaker trip sequence

Click a bus on the one-line to apply fault

Fault Type

3Φ: Symmetrical fault — worst case fault current, equal in all three phases. Sets basis for short-circuit withstand ratings.

System Parameters

Transformer Rating1500 kVA

Utility Short-Circuit MVA100 MVA

Event Log

No fault applied — click a bus on the one-line diagram

IEEE 551 / NEC Reference: Short-circuit current ratings for equipment must exceed the available fault current (NEC 110.9). IEEE 551 (Violet Book) provides the standard calculation method. All OCPDs must have an interrupting rating ≥ available fault current at the point of installation.