The protection of transformers using non electrical quantities such as oil, gas, and temperature is called non electrical quantity protection. There are mainly gas protection, pressure protection, temperature protection, oil level protection, and cooler full stop. Transformer Non-Electrical Protection refers to protective measures based on monitoring non-electrical parameters, addressing faults that electrical relays cannot directly detect. These safeguards are critical for preventing insulation failure, internal faults, and catastrophic damage in power. is on numerical relays since they have facilitated the calculation of symmetrical components. Negative-sequence quantities ( e voltage and current denoted by V2 and I2) are very useful quantities in protective relaying. The simplicity in the calculation of these quantities in modern numerical. The utility model discloses a non-electric quantity protection device of transformer, its characterized in that: the method comprises the following steps: the intelligent box comprises a box body, wherein an alternating current sampling module, an A/D module, an MCU, an input module, a display. The protection system must not react to faults in neighboring zones or high load currents. Sensitivity refers to the minimal changes in measured parameter that the system can react to.
