Causes of Faults in Transformers Transformers are critical components in electrical power systems, and their failure can lead to significant operational disruptions. Various factors contribute to transformer faults, which can be classified based on their origin and impact. Here are some of the most common causes of transformer faults: 1. Winding to Core Faults (Insulation Failure) One of the most common transformer faults occurs due to weakening of insulation between the winding and core. Over time, insulation deteriorates due to aging, overheating, or moisture, leading to short circuits. Key Points: Phase to phase faults inside transformers are rare. Faults may occur at terminals, which are within the transformer protection zone. 2. On Load Tap Changer (OLTC) Faults Power transformers are often equipped with an On Load Tap Changer (OLTC) to regulate voltage levels. This component is prone to mechanical failures, contact wear, or improper operation, leading to transformer faults....
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