Basic Features

• Differential protection and distance protection for medium-voltage and high-voltage applications
• Tripping: 3-pole
• Minimum tripping time: 19 ms
• Main protection function is differential protection with adaptive algorithm for maximum sensitivity and stability even with the most different transformer errors, current-transformer saturation and capacitive charging currents
• A number of distance-protection functions selectable as backup protection or secondary main protection: Classic, reactance method (RMD), and impedance protection for transformers
• Directional backup protection and various additional functions
• Uses pulse detection method to detect transient ground faults
• Detection of current-transformer saturation with high accuracy for fast tripping
• Fault Locator Plus function with inhomogeneous line sections and targeted automatic overhead-line section reclosing (AREC) to accurately identify fault location
• Arc protection
• Automatic frequency relief for underfrequency load shedding, taking the changed infeed conditions arising from decentralized power generation into consideration
• Directional reactive power undervoltage protection (QU protection)
• Control, synchrocheck and switchgear interlocking protection
• 2 optional pluggable communication modules, usable for different and redundant protocols (IEC 61850-8-1, IEC 60870-5-103, IEC 60870-5-104, Modbus TCP, DNP3 serial and TCP, and PROFINET I/O)
• Reliable data transmission via PRP and HSR redundancy protocols
• Extensive cybersecurity functionality (e.g. role-based access control (RBAC), protocolling security-related events, signed firmware or authenticated network access IEEE 802.1X)
• Provides simple, quick and secure access to the device via a standard Web browser to display all information and diagnostic data, as well as vector diagrams, single-line diagrams, and device display pages
• Phasor Measurement Unit (PMU) for synchrophasor measured values and IEEE C37.118 protocol
• Time synchronization using IEEE 1588
• Enables powerful fault recording (buffer for a max. record time of 80 sec. at 8 kHz or 320 sec. at 2 kHz)