Main function:

• Feeder and overcurrent protection for all voltage levels

Inputs and outputs:

• 4 current transformers,
• 4 voltage transformers (optional),
• 11 or 23 binary inputs,
• 9 or 16 binary outputs,

or

• 8 current transformers,
• 7 binary inputs,
• 7 binary outputs

Hardware flexibility:

• Different hardware quantity structures for binary inputs and outputs are available in the 1/3 base module. Adding 1/6 expansion modules is not possible; available with large or small display.

Housing width:

• 1/3 × 19 inches

Function

DIGSI 5 permits all functions to be configured and combined as required.

• Directional and non-directional overcurrent protection with additional functions
• Optimized tripping times due to directional comparison and protection data communication
• Detection of ground faults of any type in compensated or isolated electrical power systems using the following functions: 3I0>, V0>, transient ground fault, cos φ, sin φ, dir. detection of intermittent ground faults, harmonic detection and admittance measurement
• Detection of intermittent ground faults with automatic blocking of static measuring functions, to avoid message and fault record flooding
• Ground fault detection using the pulse detection method
• Arc protection
• Overvoltage and undervoltage protection
• Frequency protection and frequency change protection for load shedding applications
• Automatic frequency relief for underfrequency load shedding, taking changed infeed conditions due to decentralized power generation into consideration
• Power protection, configurable as active or reactive power protection
• Protection functions for capacitor banks, such as overcurrent, overload, current unbalance, peak overvoltage, or differential protection
• Directional reactive power undervoltage protection (QU protection)
• Control, synchrocheck and switchgear interlocking protection, circuit-breaker failure protection
• Circuit-Breaker Failure Protection
• Circuit breaker reignition monitoring
• Graphical logic editor to create powerful automation functions in the device
• Detection of current and voltage signals up to the 50th harmonic with high accuracy for selected protection functions (such as peak overvoltage protection for capacitors) and operational measured values
• PQ-Basic: voltage unbalance; voltage changes: overvoltage, dip, interruption; TDD, THD and Harmonics
• Single-line representation in small or large display
• Integrated electrical Ethernet RJ45 for DIGSI 5 and IEC 61850 (reporting and GOOSE)
• 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, PROFINET IO)
• Serial protection data communication via optical fibers, two-wire connections and communication networks  (IEEE C37.94, and others), including automatic switchover between ring and chain topology
• Reliable data transmission via PRP and HSR redundancy protocols
• Extensive cybersecurity functionality, such as role-based access control (RBAC), protocolling security-related events, signed firmware or signed firmware or authenticated network access IEEE 802.1X
• 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 and device display pages
• Whitepaper Phasor Measurement Unit (PMU) for synchrophasor measured values and IEEE C37.118 protocol
• Time synchronization using IEEE 1588
• Control of Power Transformers
• Powerful fault recording (buffer for a max. record time of 80 sec. at 8 kHz or 320 sec. at 2 kHz)
• Auxiliary functions for simple tests and commissioning