What protective devices does a three-phase transformer have?

Microcomputer Protection Device: The microcomputer protection device for three-phase transformers consists of highly integrated components, chip-on-bus single-chip micro-controllers, high-precision current-voltage transformers, high-insulation-strength output intermediate relays, high-reliability switch power modules, etc. The microcomputer protection device is mainly used for power plants, substations, distribution stations with voltage levels of 110KV and below, and can also be used for the protection and measurement and control of voltage and current systems between some voltage levels between 70V and 220V.

Differential Protection Device: The differential protection device for three-phase transformers is mainly used to protect transformer equipment. The differential protection device for transformers should have differential quick-break protection and compound ratio differential protection with or without second harmonic braking. It can be used in situations with three-side differential current input (three-winding transformers), and has complete and powerful acquisition functions for analog and digital quantities of primary equipment voltage and current. It is equipped with standard RS485 and industrial CAN communication ports, and through reasonable configuration, it realizes protection and measurement and control functions such as three-winding main transformer differential protection, two-winding main transformer differential protection, two-winding auxiliary transformer differential protection, and non-electric quantity protection.

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