Standard Configurations Overview
The document outlines the standard configurations for the Relion® 615 series, specifically the REF615 feeder protection and control system. It details various protection functionalities and configurations labeled A through F, each with specific included and optional features.

Protection Functions
The REF615 series supports a range of protection functions, including:

• Non-directional and directional overcurrent protection
• Earth-fault protection with phase-voltage based measurements
• Undervoltage and overvoltage protection

Each configuration (A, B, C, D, E, F) includes different combinations of these functions, with some being optional.

Supported Functions and Codes
The document lists supported functions with corresponding ANSI and IEC codes, such as:

• Three-phase non-directional overcurrent (ANSI 51P-1, IEC 3I>)
• Directional earth-fault (ANSI 67N-1, IEC I0> →)
• Negative-sequence overcurrent (ANSI 46, IEC I2>)

These functions are crucial for ensuring the reliability and safety of electrical systems.

Control and Monitoring
The REF615 series also includes control and monitoring capabilities:

• Circuit breaker control with basic and extended interlocking
• Auto-reclosing of circuit breakers
• Supervision functions like fuse failure and current circuit supervision

These features enhance the operational efficiency and safety of the electrical distribution system.

Measurement Capabilities
The system provides comprehensive measurement capabilities, including:

• Three-phase current and voltage
• Current and voltage sequence components
• Residual current and voltage
• Power and energy measurements

These measurements are essential for monitoring and managing electrical loads effectively.

Conclusion
The REF615 series offers a versatile and comprehensive solution for feeder protection and control, with a wide range of configurable options to suit different application needs. Its robust protection, control, and measurement functions make it a reliable choice for ensuring the safety and efficiency of electrical distribution systems.