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The SIPROTEC 7SC80 feeder protection can be used for protection and automation of medium voltage distribution feeders with grounded or low resistance grounded, isolated, or compensated neutral point. The 7SC80 features “flexible protection functions”. 20 additional protection functions can be created by the user. For example, a rate of change of frequency function or a reverse power function can be created. The relay provides circuit-breaker control.
Additional primary switching devices (grounding switches, transfer switches and isolating switches) can also be controlled from the relay. Automation or PLC logic functionality is also implemented in the device. The integrated programmable logic (CFC) allows the user to add own functions, e.g. for the automation of switchgear (including: interlocking, transfer and load shedding schemes). The user is also allowed to generate user-defined messages. The upgrade of device and communication firmware is also possible via Ethernet.
Control functions/programmable logic
The feeder protection SIPROTEC 7SC80 is a numerical protection device that can perform control and monitoring functions and therefore provides the user with a costeffective platform for power system management, that ensures reliable supply of electrical power to the customers. Device operation was designed according to ergonomic aspects. Top priority was given to good display readability and large function keys. The 32 LEDs allow displaying numerous states and alarms.
The integrated control function permits control of disconnect devices, grounding switches or circuit-breakers through the integrated operator panel, binary inputs, DIGSI 4 or the systems control (e.g. SICAM).
The integrated logic characteristics (CFC) allow the user to add own functions for automation of switchgear (e.g. interlocking), switching sequence or of the distribution system. The user can also generate user-defined messages.
Operational measured values
Extensive measured values, metered values and limit values provide improved system management as well as commissioning.
Event logs, trip logs, fault records and statistics documents are stored in the relay to provide the user or operator with all the key data required to operate modern substations.
The SIPROTEC 7SC80 units can also be used for line protection of medium-voltage distribution feeders with grounded, low-resistance grounded, isolated, or compensated neutral.
The device provides all the functions for backup protection for transformer differential protection. The inrush suppression effectively prevents unwanted trips that can be caused by inrush currents. The high-impedance restricted groundfault protection detects short-circuits and insulation faults on the transformer.
As a backup protection the SIPROTEC 7SC80 devices are universally applicable.
Switchgear cubicles for high/medium voltage
All units are designed specifically to meet the requirements of high / medium-voltage applications. In general, no separate measuring instruments (e.g., for current, voltage, frequency, …) or additional control components are necessary.
Intelligent technologies for stable grids
Automation solutions and remote control technology enhance the reliability of distribution grids
Despite every effort, grid disturbances and faults can never be entirely eliminated. This is why control room personnel must be enabled to work quickly and effectively to resolve problems in a targeted manner. Comprehensive automation and remote-control solutions optimize these capabilities.
Efficient grid expansion
A combination of robust technology and digital innovations leads to increased efficiency
Maintaining or even increasing grid performance is becoming ever more challenging. With growing efforts, expenses grow as well. Innovative technologies and smart data usage can help municipalities and DSOs to master these challenges and to increase their competitiveness.
Keeping your grids up and running
Using sophisticated tools and solutions for fast grid restoration
Unplanned outages cannot always be avoided. Flexible solutions for local and remote monitoring enable the fast and efficient restoration of cable grids and overhead lines.
Optimizing business operations
Comprehensive and efficient ways for municipalities and DSOs to get the most out of their OPEX
The growing demand for power from industries and households can be fulfilled simply. With modern technologies and innovative solutions such as optimized voltage and capacity management, self-healing grids, and by avoiding losses of any kind.
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