Protection Features

• Comprehensive Generator Protection: Includes phase, negative-sequence, residual-ground, and neutral-ground overcurrent elements for backup protection. 
• 100% Stator Ground Protection: Utilizes third-harmonic voltage differential detection for complete stator winding coverage.
• Current Differential Protection: Offers dual-slope percentage-restrained current differential elements with harmonic blocking and restraint for sensitive and secure protection. 
• Breaker Failure Protection: Provides protection for three-pole breakers. 
• Thermal Overload Protection: Monitors thermal conditions to prevent overheating.
• Loss-of-Field Protection: Detects loss of excitation to prevent generator damage.
• Over/Under Voltage and Frequency Protection: Ensures voltage and frequency remain within safe operating limits.
• Vector Shift and Rate-of-Change-of-Frequency (ROCOF) Protection: Supports islanding detection and system stability. 

Interface and Display

• Touchscreen Display: Optional 5-inch, 800 × 480 color touchscreen for direct setting, monitoring, and control, including up to five two- or three-position disconnect switches.

Input/Output and Communication

• Flexible I/O Options: Base system includes three digital outputs and two digital inputs, with three card slots for optional SELect I/O cards, including combinations of digital inputs/outputs, analog inputs/outputs, RTD inputs, and more.
• Communication Protocols: Supports a wide range of protocols, including IEC 61850 Edition 2, EtherNet/IP, IEEE 1588 PTP, IEC 60870-5-103, IEC 62439 PRP and RSTP, Mirrored Bits communications, Modbus, DNP3 serial, and DNP3 LAN/WAN.

Environmental and Reliability

• Operating Temperature Range: –40° to +85°C (–40° to +185°F), suitable for extreme conditions.
• Certifications: ATEX-certified and UL Class I, Division 2-certified for use in hazardous and potentially explosive environments.

Additional Features

• Autosynchronizer: Built-in automatic synchronizer function eliminates the need for external synchronizer equipment, automatically synchronizing frequency, voltage, and phase control.
• Breaker Wear Monitoring: Tracks breaker contact wear using manufacturer’s specifications, facilitating proactive maintenance. 
• LEA Sensor Inputs: Supports low-energy analog inputs for medium- and low-voltage applications using low-energy voltage sensors and Rogowski coils.
• Web Server Access: Built-in web server enables secure, remote access to the relay with password protection, allowing for status reports download and remote monitoring.