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.

Control

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).

Programmable logic

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.

Operational indication

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.

Line protection

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.

Transformer protection

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.

Backup protection

As a backup protection the SIPROTEC 7SJ80 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.