Network security: Supports role-based access control (RBAC), certificate management, and complies with power system security standards.
Monitoring and Logic
monitor function
Measurement quantities: current (CMMXU), voltage (VMMXU), power (CVMMXN), sequence components (CMSQI/VMS QI), with an accuracy of 0.5 level.
Event recording: Fault waveform recording (DRPRDRE), operation event (EVENT), supporting post fault analysis.
Logic function block
Trip Logic (SMPPTRC): Supports three-phase/single-phase tripping, including locking function;
General logic: AND, OR, TIMERSET, etc., customizable protection logic chain.
Summary
RET650 as RELION ® The core product of the 650 series integrates differential, backup, control, and communication functions required for transformer protection, and adapts to complex power grid scenarios through flexible configuration and high-precision measurement. The manual provides detailed guidance on setting up from basic configuration to advanced functions, providing comprehensive support for engineering design, debugging, and operation and maintenance. It is suitable for transformer protection needs in the power generation, transmission, and industrial fields.

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