Line Differential Protection SIPROTEC 7SD80
The SIPROTEC 7SD80 line differential protection is designed for selective line protection of power cables and overhead lines that are up to 24 km for all kind of starpoint configurations.
The phase comparison algorithm used is a fast and stable method for line protection in industry and distribution grids. During protection interface communication, copper wires, optical fibers or both in redundancy are used without external equipment over them. The wide scope of non-directional and directional functions can be applied diversely as emergency functions or backup functions.
Enquiry about Line Differential Protection SIPROTEC 7SD80
Basic Features
- Guarantees fast and selective tripping even if communication between relays fails
- Scope of functions includes protection, control, and monitoring
- Interoperable connectivity to substation control systems via standard protocols (e.g. IEC 61850)
- General concept of redundancy for protection and its communication fulfilled by Ethernet redundancy protocols (PRP, HSR, and RSTP)
- Line differential protection (87L)
- 3I0 differential protection (87N L)
- Ground-fault differential protection for systems with resonant or isolated neutral (87Ns L)
- Definite time-overcurrent protection with delay for phase and earth (50TD/50N TD (3 stages)
- Inverse time-overcurrent protection (phase and ground) (51/51N)
- Circuit-breaker failure protection (50BF)
- Trip-circuit supervision (74TC)
- Lockout (86)
- Circuit breaker intertripping scheme (85 DT)
- Undervoltage/overvoltage protection (27/59)
- Underfrequency/overfrequency protection (81 U/O)
- Directional time-overcurrent protection (phase and ground) (67/67N (3 stages))
- Automatic reclosing (79)
- Flexible protection functions for current, voltage, power, cos Φ, and frequency
- Thermal overload protection (49)