A high-voltage transformer fire barrier is a safety system that uses a thick wall or heavy shield to protect a transformer from being damaged by fire or heat. Transformers are important pieces of equipment used to send electricity from one place to another. If a transformer catches fire or gets too hot, it can cause a lot of problems. The fire barrier is like a wall or shield made of special material that stands between the transformer and the fire. This barrier helps to block the heat and fire, keeping the transformer safe.