SkillsLib.ai

Power System Protection Coordinator

Coordinate protective devices and generate arc flash studies for power systems

3.3(4 reviews)
10+ downloads
Updated Nov 2026

What You Can Do

Analyze your power system topology, coordinate protective devices for optimal selectivity and speed, and generate comprehensive arc flash hazard analyses compliant with IEEE 1584. You get fault current calculations, device coordination plots, and hazard risk assessments that guide equipment upgrades and safety training.

Features

Protective Device Coordination

Coordinate fuses, relays, and breakers across your power system to ensure proper selectivity and minimize outage scope. Generates coordination tables and time-current curves.

Arc Flash Hazard Analysis

Calculate incident energy and arc flash boundaries using IEEE 1584 methodologies. Produce hazard labels and PPE requirements for each equipment location.

Fault Current Calculations

Compute bolted fault currents, arcing fault currents, and protective device clearing times. Includes subtransient, transient, and steady-state contributions.

Equipment Protection Profiles

Define protection schemes for transformers, motors, feeders, and busbars. Verify coordination between upstream and downstream devices.

Single-Line Diagram Analysis

Parse and interpret single-line diagrams to build system models. Extract impedance data, transformer ratios, and equipment ratings.

Coordination Time Curve Generation

Produce time-current plots showing device clearing times, selectivity zones, and coordination margins. Identify any coordination violations.

Verification Checklists

Systematic verification against IEEE 1584, IEEE C37 standards, and NFPA 70E. Confirms all calculations and device settings are defensible.

Example Output

Arc Flash Study Summary:

  • Substation Transformer (480V): 35.4 kA bolted fault, 8.2 cal/cm² incident energy, PPE Level 1
  • Motor Control Center (MCC): 22.1 kA bolted fault, 4.6 cal/cm², arc flash boundary 42 inches
  • Main Feeder Breaker: Coordinates with downstream devices; margin 0.35 cycles (acceptable)

Protective Device Coordination Table:

LocationDeviceSettingClearing TimeUpstream DeviceSelectivity
SubstationTransformer Fuse200A0.12s @ 35kAMain Breaker✓ Selective
Feeder ABreaker400A, 2s delay2.1s @ 22kATransformer Fuse✓ Selective

Verification Results: All devices coordinated per IEEE C37.23. Arc flash assessments aligned with NFPA 70E. Equipment protection verified—no violations.

What's Included

  • Device Coordination Template: Pre-built spreadsheet for entering system impedance, equipment ratings, and device settings. Auto-calculates fault currents and generates coordination tables.
  • Arc Flash Study Workbook: Step-by-step worksheet for IEEE 1584 calculations. Includes formulas for three-phase and arc faults, incident energy, and PPE level mapping.
  • Fault Current Calculator: Script to compute bolted fault contributions from generators, motors, and utility sources. Handles subtransient and transient reactances.
  • Verification Checklist: Compliance checklist against IEEE 1584, IEEE C37 (protective device coordination), and NFPA 70E (electrical safety). Tracks all assumptions and data sources.
  • Standards Reference Guide: Quick-reference summaries of IEEE 1584, IEEE C37.23, and NFPA 70E requirements. Explains coordination principles and hazard assessment logic.

Who It's For

  • Protection Engineers
  • Power Systems Engineers
  • Electrical Safety Specialists
  • Facility Electrical Designers
  • Compliance and Risk Managers

Best For

  • Arc Flash Assessments
  • Protective Device Coordination Studies
  • Fault Current Analysis
  • Equipment Protection Verification
  • Electrical Safety Compliance Documentation

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