Siemens Siprotec 5 7UT82 Transformer Differential Protection Relay

The transformer differential protection SIPROTEC 7UT82 is a universal protection, control, and automation device on the basis of the SIPROTEC 5 system. It is specially designed for the protection two winding transformers. It is the main protection for the transformer and contains many other protection and monitoring functions. The additional protection functions can also be used as backup protection for protected downstream objects (e.g. cables, line).This decice, 7UT82 Transformer Protection Relay supports all SIPROTEC 5 system characteristics.

It enables future-oriented system solutions with high investment security and low operating costs. Main function:1 Differential protection (standard- or autotransformer) with add-on stabilizations; Up to 2 differential ground-fault protection Useful measuring point:2 three-pole current measuring points 2 one-pole current measuring points Inputs and outputs:-1 predefined standard variant with 8 current transformers, 7 binary inputs, 7 binary outputs Hardware flexibility: The 1/3 base module is available with IO103, it is not possible to add 1/6 expansion modules, available with the large and small display. Width of housing:1/319”

All functions can be configured freely with DIGSI 5. For the application of some of the functions, you require the appropriate number of free function points within the device. The function point calculator in the online configurator provides support in determining the required number of function points for your device.

FUNCTIONS

• Transformer differential protection for two-winding transformers with versatile, additional protection functions
• Transformer differential protection for phase-angle regulating transformers of the single core type
• Universal usability of the permissible measuring points
• Applicable from average up to extra-high voltage
• Protection of standard power transformers, auto transformers and motors
• Increased sensitivity with near-neutral-point ground faults through a separate restricted ground-fault protection
• Flexible adaptation to the transformer vector group
• Controlling closing and overexcitation processes
• Safe behavior in case of current-transformer saturation with different degrees of saturation
• Adaptive adaptation of the operate curve to the transformer tap position
• Arc protection
• 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)
• Up to 2 optional pluggable communication modules, usable for different and redundant protocols (IEC 61850, 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
• Redundancy protocols PRP and HSR
• Cyber security to NERC CIP and BDWE Whitepaper requirements
• Time synchronization using IEEE 1588
• Phasor Measurement Unit (PMU) for synchrophasor-measured values and IEEE C37.118 protocol
• Powerful fault recording (buffer for a max. record time of 80 sec. at 8 kHz or 320 sec. at 2 kHz)
• Auxiliary functions for easy tests and commissioning

SIPROTEC 5 is part of the new generation of incomparable modular, flexible, and intelligent digital field devices. With modularly designed hardware and software and its high-performance DIGSI 5 engineering tool, the SIPROTEC 5 product family of field devices are perfect for protection, control, monitoring, and measuring applications in electrical energy systems. SIPROTEC 5 offers a wide product range with modular elements for every application and requirement.