Independent electrical engineering publication
Electrical engineering, explained for practical decisions.
OHELE covers power systems, transformers, protection and control, motors and automation, wiring and busbars, safety and standards, hazardous areas, and renewable-energy systems. The articles are written for engineers, technicians, maintenance teams and technical buyers who need clear explanations, selection boundaries and field-oriented verification questions.
Explore the electrical topics
Foundations
Voltage, current, energy, generation and the calculations that connect them.
Protection & Control
Protective devices, relays, coordination, trip systems and controlled switching.
Motors & Automation
Motor circuits, starting, drives, protection, motion and maintenance decisions.
Transformers & Power Systems
Transformer operation, ratings, protection, diagnostics and installation.
Substations, generation, power quality, reactive power and system reliability.
Wiring, Cables & Busbars
Conductor sizing, cable systems, busbars, terminals, joints and panel wiring.
Safety & Standards
Testing, isolation, earthing, PPE, arc-flash and the scope of electrical requirements.
Explosion-Proof & Hazardous Areas
Explosion-Proof & Hazardous Areas
ATEX, Ex protection concepts, hazardous-area equipment and installation evidence.
Renewables & Storage
Solar conversion, battery systems, EV charging and energy-storage integration.
Pillar guides
Protection & Control
Difference Between MCB, MCCB, ELCB, RCD & RCBO Breakers
Motors & Automation
Induction Motor Calculations Every VFD User Should Know
Wiring, Cables & Busbars
Cable Sizing for Circuit-Breaker-Protected Feeders: Six Verification Gates
Safety & Standards
How to Use a Multimeter: Voltage, Current, Resistance and Continuity
Explosion-Proof & Hazardous Areas
ATEX Lighting Zones for Hazardous Areas: A Practical Selection Guide
Renewables & Storage
