Interactive labs, calculators & simulators
49 browser-based tools across 11 disciplines. No account needed to open a lab. Availability and validation are shown separately on every card.
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Arc Flash Concept Simulator
Explain how incident energy is influenced by available fault current, clearing time, working distance, and equipment configuration.
- NFPA 70E
- IEEE 1584
- ARC FLASH
CT / PT and Relay Measurement Simulator
Explain how CT ratio and burden affect secondary current accuracy and relay input.
- IEEE
- NETA ATS
- NETA MTS
Fault Current & Short-Circuit Simulator
Convert system impedances to a common per-unit base and compute total impedance from source to fault location.
- IEEE
- IEC 60909
- SHORT CIRCUIT
Generator, ATS & Emergency Power Sequence Simulator
List the sequence of states from utility loss to stable generator supply and identify timing requirements for each.
- GENERATOR
- ATS
- EMERGENCY POWER
Grounding & Bonding System Visualizer
Distinguish between grounding (earth connection) and bonding (equipotential connection) as defined by NEC Article 250.
- NEC
- GROUNDING
- BONDING
Harmonics & Waveform Distortion Lab
Explain Fourier decomposition and how any periodic waveform can be expressed as a sum of harmonic components.
- IEEE
- HARMONICS
- THD
Motor Starting Simulator
Compare inrush current magnitude and duration for DOL, reduced voltage, soft starter, and VFD starting methods.
- IEEE
- MOTOR STARTING
- DOL
One-Line Diagram Builder & Explorer
Place and connect standard one-line diagram symbols for sources, transformers, breakers, buses, and loads.
- ONE-LINE DIAGRAM
- SINGLE-LINE DIAGRAM
- SLD
Power Factor Correction Simulator
Draw and label the power triangle with real (kW), reactive (kVAR), and apparent (kVA) power components.
- IEEE
- POWER FACTOR
- KVAR
Power System Simulator
Calculate line-to-neutral and line-to-line voltages for both Wye and Delta connections given source voltage.
- THREE-PHASE POWER
- SINGLE-PHASE
- PHASOR DIAGRAM
Power Transformer Simulator
Explain the two components of transformer losses — core (no-load) losses and copper (load) losses — and identify at what load level efficiency is m…
- IEEE
- NETA ATS
- TRANSFORMER
Protection Zone & Relay Scheme Explorer
Draw and describe the protection zone boundaries for feeder, transformer, and bus protection in a simple substation.
- IEEE
- PROTECTION RELAY
- PROTECTION ZONE
Substation & Switchgear Bus Configuration Explorer
Describe the key differences between single bus, double-ended, sectionalized bus, and alternate source configurations in terms of redundancy and sw…
- IEEE
- SUBSTATION
- BUS CONFIGURATION
Symmetrical Components & Fault Visualizer
Explain why any unbalanced phasor set can be decomposed into three balanced sequence sets.
- IEEE
- IEC 60909
- SYMMETRICAL COMPONENTS
Transformer Vector Group & Polarity Visualizer
Interpret an IEC vector group designation (e.g., Dyn11, YNd1) and identify the winding connection and phase shift it encodes.
- IEEE
- DYN11
- YND1