Relay Protection of 220kV Transformer

Transformer Differential Settings: Transformers are critical substation components that need sensitive protection. Relay protection for transformers involves calculations for differential current thresholds, through-fault stability, inrush restraint, and harmonic filtering to. High Rupturing Capacity (HRC) fuses, although very fast in operation with large fault currents, are extremely slow with currents of less than three times their rated value. It follows that such fuses will do little to protect the transformer, serving only to protect the system by disconnecting a. A Buchholz relay is a gas-actuated relay installed between the transformer tank and conservator. It How Buchholz relay works...