kVA Tools logokVA ToolsBETA — Breaker Wizard

Step 1 — Application context

Incomplete
Application Equipment context
Maintainability requirement
Coordination / short-time needs
Breaker class recommendation
Suggested breaker class —
Rationale —
Complete Step 1 to unlock.

Step 2 — System basics

Incomplete
System System voltage (V)
System type
System frequency (Hz)
Grounding
Candidate device rating style
Voltage / grounding check
Compatibility —
Notes —
Complete Step 2 to unlock.

Step 3 — Load current and duty

Incomplete
Load Calculated load current (A)
Continuous load?
Device rating
Special load behavior
Continuous current target
Min. rating target (A) —
Notes —
Complete Step 3 to unlock.

Step 4 — Fault duty / interrupting rating

Incomplete
Fault Available 3φ fault current (kA RMS sym.)
X/R at fault point (optional)
Series-rated system?
Interrupting rating target
Min. standard rating (kA) —
Adjusted rating (kA) — Table 24 MF —
X/R evaluation —
Complete Step 4 to unlock.

Step 5 — Environment / service conditions

Incomplete
Environment Altitude (m)
Ambient temperature (°C)
Humidity / contamination
Environmental flags
—
Complete Steps 1–5 to unlock.

Summary

Locked
Selection targets
Breaker class —
Voltage / grounding —
Min. continuous rating —
Min. interrupting rating —