Transformers

Transformer lift using a spreader beam and four-leg sling

Transformer Slings: Safe Lifting and Handling Guide

Transformer slings are engineered lifting assemblies selected from the verified transformer mass, center of gravity, approved lifting points, sling angles, edge conditions, crane geometry, environment, and applicable…

Utility crew assessing a failed distribution transformer

What Happens When a Transformer Blows? Causes and Response

When a transformer “blows,” a fault or severe abnormal condition causes protective equipment to isolate it; the bang, flash, smoke, or outage may come from an expulsion fuse, internal arcing, bushing failure, pressure release, or burning insulation rather than the entire transformer exploding.

Industrial three-phase autotransformer installation

What Is an Autotransformer? Principle, Uses and Limits

An autotransformer is a transformer with one continuous winding and one or more taps, so part of the winding is common to both input and output; it can change voltage efficiently and compactly but normally does not provide galvanic isolation.

Qualified utility crew repairing an isolated oil-filled transformer in a substation

How Long Does It Take to Fix a Transformer?

Fixing a transformer can take from a few hours to more than a year. A loose external connection, replaceable fuse or minor accessory fault may be corrected within 4–24 hours after safe isolation. A bushing, gasket, fan, pump or tap-changer accessory repair often takes 1–7 days if parts and qualified labor are available. Internal winding or core damage commonly requires workshop repair lasting several weeks or months. If the unit must be replaced, a stocked distribution transformer may restore service in hours or days, while a custom large power transformer can require a year or longer to manufacture and deliver.