What causes a transformer to fail?

Symptoms of power quality issues include vibration, excessive buzzing or humming and overheating. Technicians should occasionally check the power of transformers that supply nonlinear loads, such as variable frequency drives (VFDs) or switching power supplies. Doing so ensures operation within acceptable limits.

Evaluation of possible Winding & Core damage through Transformer

Power Transformer Blast/Explosion – Reasons

Seven of the most common causes of Transformer Failure, and how to

Various Failure Modes in Power Transformers

How to Troubleshoot a Low-Voltage Transformer

Transformer Failure: Frequency and Causes

Distribution Transformer Failure : Causes, Analysis and Prevention

Why do Transformers fail? - Servo Star

Seven of the most common causes of Transformer Failure, and how to

Transformer failure causes [1].

What Causes Electrical Transformers to Fail? - Corefficient

Why Transformers Fail

Power Transformer Explosion: Why it Happens & What to do?