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Field notes from the electrical world.
In-depth guides, case studies and calculators on transformers, substations, renewables, EV charging and electrical machines — written by engineers, for engineers.
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Trending10 min
Data Center Electrical Infrastructure: The Backbone of Modern Digital Operations
In today’s digital world, data centers serve as the foundation of cloud computing, AI, online banking and social media.
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Appliance6 min
Top 10 Electrical Tools Every Engineer Must Know
It was 2 AM. A manufacturing plant was down. The night shift electrician made one call that changed my toolkit forever.
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Trending7 min
AI in Electrical Field — Real Applications That Matter Today
Imagine a breaker that warns you before it trips — that’s AI in action. Not futuristic, already deployed.
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From the fundamentals of basic electrical to substation earthing and BESS — every article is filed under a working engineer's category.
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Practical Solution6 min
EV Charging at Home — Load Requirement & Cost Calculation
Electric vehicles are growing fast in India. Owners now ask: can my home actually handle it?
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Case Studies5 min
Why Your Electricity Bill Is Suddenly High
One of the most common reasons is simple: you’re using more electricity than you realise. Here’s how to find where.
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Appliance4 min
Do Phone Chargers Consume Power When Left Plugged In?
Yes, phone chargers do consume a small amount of electricity even when they aren’t charging anything.
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Appliance5 min
Why Is Heavy Copper PCB Etching More Difficult?
Beyond current capacity — the manufacturer’s view on heavy copper etch behaviour.
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Electrical Machine6 min
Applying Insulating Varnish on Electrical Coils and Windings
Coils are made up of insulated wires — cotton, silk or enamel — all hygroscopic. Here’s the varnishing protocol.
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Electrical Machine5 min
Common Defects in Commutators
A good commutator has a smooth polished surface, dark chocolate brown in colour. A field diagnostic checklist.
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Electrical Machine7 min
Surge Protection of Rotating Machines
A rotating machine is less exposed to lightning surge than a transformer — but the failure mode is worse.
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Substation8 min
Parallel Operation of DC Link with AC Network
In a DC link the power to be transmitted depends on precise coordination with the AC side.
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Trending6 min
Liquid Metal Batteries: Principle & Features
To achieve carbon neutrality by 2060, non-fossil energy sources are pushing new storage chemistries.
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Machines & Substations
Deep dives for the shop floor
Appliance5 min
How to Select MCB & MCCB
Widely used in electrical distribution for ON/OFF supply and over-current protection.
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Electrical Machine8 min
Types of Motors and Their Applications
Motors convert electrical energy into mechanical energy. A working taxonomy for engineers.
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Substation9 min
Earthing Practice at Electrical Substation
Earthing practices at generating stations, substations, distribution structures and lines.
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Electrical Machine6 min
Troubleshooting of Split-Phase Motors
If a split-phase motor fails to start, the trouble may be due to one or more of these causes.
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Renewable energy
All renewables Solar, wind & storage
Renewable5 min
Wind Speed Measuring Instrumentation
Sensors classified by principle of operation — cup, vane, ultrasonic and beyond.
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Trending8 min
Battery Energy Storage Systems (BESS)
Fossil fuel depletion, rising power demand and environmental impact are pushing BESS to the front line.
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Renewable7 min
Monitoring & Troubleshooting Off-Grid Solar
Off-grid solar has emerged as an essential sustainable energy solution — here’s how to keep it alive.
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Renewable6 min
Hybrid Solar Power System
In the ever-evolving landscape of renewable energy, hybrid systems bridge grid-tied and off-grid worlds.
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Renewable6 min
Off-Grid Solar: Difference, Advantages, Disadvantages
The fundamental distinction between grid-tied and off-grid solar systems.
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Renewable7 min
Solar Energy Generation Impact on Power Grid
Power-quality issues of solar energy systems integrated into the grid.
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Transformers, transmission & protection
From testing to the tower
Transformer7 min
Transformer Testing Instruction
Instruction for measurement of L.V.–H.V. winding resistance using a micro-ohm meter.
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Transformer5 min
Cooling System Inspections in Power Transformer
After 1 month of service and yearly, inspect and test the fans. Field procedure inside.
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Substation6 min
Battery Operation and Maintenance at Substation
Ampere-hour capacity of 220V batteries at smaller sub-stations shall be 80 — and what that means for EHT.
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Substation6 min
Protection and Wiring Practice in Substation
Entire wiring for indications, alarms, metering and protection should be permanent wiring.
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Transmission5 min
What Is Ground Wire in a Transmission Line?
A conductor running parallel to the power conductors — what it does and why it matters.
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Trending5 min
Solar Inverter Maintenance & Warranty Coverage
Cleaning, visual inspection, warranty scope — a practical maintenance schedule.
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Electrical Sphere
Welcome to the electrical world. Field notes, calculators and case studies for practicing engineers.