Blog

Three-winding transformers feed two voltage systems or carry a stabilising tertiary from one core. Learn winding arrangement, the three short-circuit impedances, unequal MVA ratings and spec checks.

A practical guide to the main causes and hazards of transformer overheating — overload, poor cooling, harmonics, and internal faults — plus detection and prevention steps.

Step-by-step guide to calculating transformer overload with kVA formulas, load percentage checks, and 25% safety sizing rules. Includes examples, table, and FAQ.

Find oil under a transformer? Assess the leak rate, contain the spill, find the true source, and choose between an on-site repair and a specialist. Includes a severity table, temporary-vs-permanent fix table, and a 30-year preventive maintenance schedule.

Discover what a current transformer does in a substation, from current measurement and protection relay operation to metering and galvanic isolation.

Learn how many lights a low voltage transformer can power. Calculate fixture count using wattage, the 80% rule, voltage drop, and LED vs. halogen differences.

Practical B2B buyer's guide to choosing a power transformer manufacturer — what they make, how to vet them, the certifications that matter, and the red flags to avoid.

Anyone who has stood next to a working transformer has heard it: a low, steady hum that seems to come out of the steel and air around the unit. If you are evaluating or troubleshooting a low voltage transformer, that sound usually raises one question — is this normal, or is something already going wrong? […]

A practical guide to how isolation transformers enhance safety and power quality through galvanic isolation — plus how they differ from autotransformers and how to choose one.