Basic Features

• Up to 3 differential protection functions with additional stabilization (in different transformer function groups); up to 5 ground fault differential protection functions.
• For auto transformer applications, two differential protection functions can be processed in an Auto transformer function group.
• Transformer differential protection for multi-winding transformers with versatile, additional protection functions (multi-winding transformers are typical in power converter applications (e.g. HVDC))
• Transformer differential protection for phase-angle regulating transformers of the single core and two core types, and special transformers
• Transformer protection applications with up to 11 3-phase current measuring points
• Simultaneous differential protection for 3 transformers (e.g. 3 two-winding transformers)
• Universal usability of the permissible measuring points
• Applicable from average to extra-high voltage
• Protects standard power transformers, auto transformers, short lines, cables, longitudinal and shunt reactors, and motors
• Fault Locator Plus function with inhomogeneous line sections and targeted automatic overhead-line section reclosing (AREC) to accurately identify fault location
• Arc protection
• Voltage controller function ANSI 90V for two-winding transformers, three-winding transformers and grid coupling transformers with parallel control (master/follower, circulating reactive current minimization)
• Adaptive adaptation of the operate curve to the transformer tap position
• Increased sensitivity with near-neutral-point ground faults through a separate restricted ground-fault protection
• Point-on-wave switching
• Additional current and voltage inputs can be supplements for standard protection functions (e.g. overcurrent, voltage frequency)
• Dynamic Voltage Control (DVC) to adapt the voltage target value via a power direction dependent characteristic curve with strong infeed of regenerative energies
• Up to 4 pluggable communication modules, usable for different and redundant protocols (IEC 61850-8-1, IEC 61850-9-2 Client, IEC 60870-5-103, IEC 60870-5-104, Modbus TCP, DNP3 serial and TCP, PROFINET I/O, and PROFINET I/O S2 redundancy)
• 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
• Captures operational measured variables and protection function measured values for the evaluation of the systems to support commissioning and analyze faults
• Frequency tracked protection functions over a wide frequency range (10 Hz to 90 Hz) and the option to assign the protection functions in a single device to different frequency tracking groups.
• Phasor Measurement Unit (PMU) for synchrophasor measured values and IEEE C37.118 protocol
• Enables powerful fault recording (buffer for a max. record time of 80 sec. at 8 kHz or 320 sec. at 2 kHz)
• Flexible adjustment of I/O quantity structure within the scope of the SIPROTEC 5 modular system