Overcurrent and feeder protection

Main function:

• Feeder and overcurrent protection 

Inputs and outputs:

• 4 current transformers, 11 binary inputs, 9 binary outputs
• 4 current transformers, 18 binary inputs, 14 binary outputs
• 4 current transformers, 4 voltage transformers, 11 binary inputs, 9 binary outputs
• 4 current transformers, 4 voltage transformers, 16 binary inputs, 11 binary outputs

Hardware flexibility:

• Different hardware quantity structures for binary inputs and outputs are available in the 1/3 base module. 1 plug-in module position, available with large or small display

Housing width:

• 1/3 × 19 inches

As standard:

• Conformal coating

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

• Directional and non-directional overcurrent protection with additional functions
• Detection of ground faults of any type in compensated or isolated electrical power systems using the following functions: 3I0>, V0>, fleeting contact, cos φ, sin φ, dir. detection of intermittent ground faults and admittance
• Arc protection (note the resulting communication restrictions)
• Overvoltage and undervoltage protection
• Frequency protection and frequency change protection for load shedding applications
• Power protection, configurable as active or reactive power protection
• Directional reactive power undervoltage protection (QU protection)
• Control with switchgear interlocking protection
• Synchrocheck
• Circuit-breaker failure protection
• Detection of current and voltage signals up to the 50th harmonic with high accuracy for selected protection functions and operational measured values
• Graphical logic editor to create powerful automation functions in the device
• Single-line representation in small or large display
• Integrated electrical Ethernet RJ45 for DIGSI 5 and IEC 61850 (reporting and GOOSE)
• 1 optional, plug-in module for a) communication protocols or b) for arc protection
• Redundant and simple communication protocols according to IEC 61850-8-1, IEC 60870-5-103, IEC 60870-5-104, Modbus TCP, DNP3 serial and TCP, PROFINET IO
• Reliable data transmission via PRP and HSR redundancy protocols
• Extensive cyber security functionality, such as role-based access control (RBAC), protocolling security-related events or signed firmware
• Simple, quick and secure access to device data via a standard Web browser – without additional software
• Time synchronization using IEEE 1588
• Standard fault recording (buffer for a max. record time of approx. 40 sec. at 2 kHz)
• Auxiliary functions for simple tests and commissioning

• Detection and selective 3-pole tripping of short circuits in electrical equipment of star networks, lines with infeed at one or two ends, parallel lines and open-circuited or closed ring systems of all voltage levels
• Detection of ground faults in isolated or arc-suppression-coilground power systems in star, ring, or meshed arrangement
• Backup protection for differential protection devices of all kind for lines, transformers, generators, motors, and busbars
• Universal line protection
• Simple load shedding applications

• Compact and low-cost overcurrent protection
• Safety due to powerful protection functions
• Data security and transparency over the entire lifecycle of the plant, saving time and money
• Purposeful and easy handling of devices and software thanks to a user-friendly design
• Increased reliability and quality of the engineering process
• Cyber security according to NERC CIP and BDEW Whitepaper requirements (for example, logging security-related events and alarms)
• Highest availability even under extreme environmental conditions by “conformal coating“ of electronic boards
• High-performance communication components warrant safe and effective solutions
• Full compatibility between IEC 61850 Editions 1 and 2
• High investment security and low operating costs due to future-oriented system solutions