Engineering Calculators

Electrical Engineering Calculators

Load demand, transformers, generators, motors, drives, cable sizing, short circuit, protection, earthing, UPS systems, batteries, lighting, heat tracing and power-quality calculations. Selectable units and separate calculation history are included.

Complete Electrical Design Sequence

Use the sequence below to move from load definition to a coordinated, safe and operable electrical system.

Standards & Engineering Limitations

Preliminary engineering only. Protection coordination, arc-flash PPE, grounding-grid safety, generator transient response, detailed cable thermal ratings and hazardous-area certification require validated software, controlled standards and approved project inputs.

IEC 60364

Low-voltage installation safety, protection, conductor selection and verification.

IEC 60909

Maximum and minimum short-circuit current calculations for three-phase AC systems.

IEC 60079

Explosive atmospheres, equipment protection, installation and inspection.

IEEE 80 / IEEE 1584

Substation grounding safety and arc-flash hazard studies where contractually applicable.

API 541 / API 547

Special-purpose and general-purpose form-wound induction motors for petroleum and related services.

Project requirements

Owner standards, utility rules, local regulations, cable data and vendor curves remain governing.

Important: Results are preliminary. Final electrical design shall use approved project load data, controlled standards, manufacturer information and validated system studies for protection, arc flash, grounding, motor starting, generator transients and hazardous-area compliance.