480V Fault Calculator & Coordination Toolkit
480V Selective Coordination Toolkit
Practical protection coordination for small and mid-size industrial facilities
The 480V Selective Coordination Toolkit is a professional Excel-based engineering workbook designed to help industrial facilities validate breaker coordination, estimate available fault current, and reduce nuisance tripping — without requiring a full $15,000–$40,000 coordination study.
This toolkit is ideal for facilities without an in-house protection engineer that still need practical, technically sound coordination validation.
🔹 What This Toolkit Does
Calculates 3-phase available fault current at a 480V main
Includes transformer-based short-circuit estimation
Models feeder impedance (R/X, length, parallel runs)
Includes cable size lookup dropdown (Cu & Al)
Validates upstream/downstream coordination margins
Checks interrupting rating vs available fault current
Provides structured coordination test points
Flags PASS / FAIL coordination gaps
🔹 Built-In Fault Current Estimator
If available fault current is unknown (common in small plants), the toolkit includes:
Transformer kVA input
Transformer impedance (%Z)
Secondary voltage
Optional feeder impedance modeling
Cable R/X lookup database
This allows realistic switchboard-level fault current estimation without requiring a full utility study.
🔹 Who This Is For
Maintenance Managers
Plant Engineers
Electrical Supervisors
Industrial Facility Owners
Especially valuable for:
Manufacturing plants
Concrete batch plants
Water / wastewater facilities
Agricultural processing facilities
🔹 What’s Included
480V Selective Coordination Excel Workbook
Transformer-Based Fault Current Calculator
Feeder Impedance Modeling Tool
Cable R/X Lookup Database
Coordination Validation Logic
Step-by-Step User Guide (DOCX)
Digital download. No subscription required.
🔹 Important Disclaimer
This toolkit provides preliminary coordination analysis and engineering support. Final protective device settings must be reviewed and approved by a qualified licensed professional engineer.
This product does not replace a full short-circuit and coordination study where required by code or project specifications.
