Feeder Automation Controller
We offer you considerably more than just a simple time-over current protection
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.
Support of feeder automation applications, e.g. fault isolation and service restauration
Designed for harsh environment
Extended temperature range –50 °C up to 85 °C
Open for all different communication technologies, e.g. radio, which are used for feeder automation
Integrated GPS module is available for time synchronisation
Full remote access supported for firmware and parameter updates and upgrades
A web based HMI provides complete remote control of the device
9 programmable function keys
Integrated switch for low-cost and redundant optical rings. Devices can be connected directly with each other at electrical modules
Parallel running communication protocols
Redundancy protocols RSTP, PRP and HSR for highest availability
Current Jump detector
Extended CFC capabilities
24 km Single mode interface
RTU version without protection features
Secondary current transformers values (1 A / 5 A9 settable using DIGSI
Buffer battery exchangeable from the side
USB front port
Relay-to-relay communication through Ethernet with IEC 61850 GOOSE
Stainless steel housing
Millisecond-accurate time synchronization through Ethernet with SNTP
Inputs for Low power CTs and VTs according IEC 61869-6 (formerly IEC 60044-7 and IEC 60044-8)
Commands for the ctrl. of CB, disconnect switches (isolators/isolating switches)
Control through keyboard, binary inputs, DIGSI 4 or SCADA system
User-defined PLC logic with CFC (e.g. interlocking)
Operational measured values V, I, f
Energy metering values Wp,Wq
Minimum and maximum values
Circuit-breaker wear monitoring
Fuse failure monitor
8 oscillographic fault records
Trip circuit supervision
Ethernet electrical and optical (miltimode or single-mode)
IEC 61850 Edition 1 and 2
Ethernet redundancy protocols RSTP, PRP and HSR
USB front interface for DIGSI 4
4 current transformers
1/4 voltage transformers
12 binary inputs
8 binary outputs
1 life contact
Pluggable current and voltage terminal blocks
Connection option for low-power current and voltage transformers
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
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
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