● The Buchholz Relay Is a critical protective device used in oil-filled transformers and reactors. Its main function is to detect internal faults before they become catastrophic. ●The operation principle: 1. It senses gas formation or oil movement caused by insulation failures, minor arcing, or oil leaks. 2. Installed between the main tank and conservator, it uses a float or flap mechanism to trigger an alarm or trip the circuit breaker, protecting the transformer from severe damage. #transforme