Why Your Home Appliances Perform Differently at Different Times of the Day
Many Nigerians have noticed that a fan spins faster in the afternoon than it does at 7pm, or that the electric iron seems to take longer to heat up in the evening…
What Is Transformer Inrush Current and Why Does It Occur?
Switch on a large transformer and for a brief moment it can draw a current many times higher than its normal full-load rating, enough to trip protective relays, dim…
What Causes Transformer Overheating?
Overheating is the single most common thread running through transformer failures, whether the end result is a tripped protection relay, a slowly degraded winding, or in…
What Is a Current Transformer and Where Is It Used?
Most people picture a transformer as a large device that changes voltage on the power grid, but a huge number of transformers in any electrical system exist purely to…
Current Transformer vs Voltage Transformer: What’s the Difference?
Current transformers and voltage transformers are often mentioned in the same breath because both are instrument transformers that scale down high electrical quantities…
Why You Should Never Leave a Current Transformer Secondary Open
Of all the safety rules taught to electrical technicians, few are repeated as insistently as this one: never open the secondary circuit of a current transformer while…
What Is Transformer Regulation and Why Does It Matter?
A transformer’s output voltage does not stay perfectly fixed as load changes, it sags slightly under heavier load due to internal impedance, and how much it sags is…
How Electricity Transformers Reduce Energy Loss in Power Networks
Sending electricity over long distances always loses some energy to heat in the conductors along the way, and without transformers, that loss would be so severe that…
Dry-Type vs Oil-Immersed Transformers: What’s the Difference?
Walk into any substation or industrial plant in Nigeria and you will find transformers built in one of two fundamentally different ways: some are sealed steel tanks full…
What Is Transformer Oil and Why Is It So Important?
Inside every oil-immersed transformer, a straw-coloured liquid quietly does two of the most important jobs in the entire machine: keeping the windings insulated from…