Secure Line Differential Protection
Sensitive differential elements provide subcycle operating time. Restraint for external faults uses an easy-to-set vector ratio of remote and local currents.
Synchrophasor Measurements
Turn state estimation into state measurement with wide-area measurement of voltage and current phase angles and magnitudes. Improve system stability with high-speed, load-angle measurements. Increase stable loading with analysis of voltage and angular stability.
Complete Line Protection
Protect transmission lines using differential and a combination of four stepped-distance zones of phase and ground-distance elements in communications-assisted schemes, with directional overcurrent element backup protection. Patented Capacitance Voltage Transformer (CVT) transient overreach logic enhances security of Zone 1 distance elements. Best Choice Ground Directional Element® logic optimizes directional element performance and requires no directional settings.
Single-Pole Tripping
Use the optional single-pole tripping capability of the differential elements to improve system stability.
Built-In Web Server
Access basic relay information on a standard Ethernet network with a built-in web server. View relay status, Sequential Events Recorder (SER), metering information, and settings through easy access within a local network. Web server access requires relay password and is limited to read-only viewing of information.
Monitoring and Metering
Event reports, SER, circuit breaker contact wear monitor, substation battery monitor, instantaneous and demand metering, and local display panel.
Reclosing
Programmable four-shot breaker autoreclose with synchronism and voltage check logic for optimal system restoration.
Communications
Choose from four different channel types for differential communications:
- ITU-T G.703 codirectional to multiplexer
- EIA-422 56/64 Kbps
- IEEE C37.94 fiber-optic
- 1300 nm single-mode, fiber-optic
EIA-232 and EIA-485 serial ports for local/remote access and system integration.
Mirrored Bits® communications protocol for eight channels of secure relay-to-relay logic communications available on both rear-panel EIA-232 serial ports.
Download event reports using the optional Ethernet port. Quickly move information with IEC 61850 protocol, which includes a Select-Before-Operate function for added operational security. Increase communications dependability with dual failover Ethernet.
- acSELerator QuickSet® SEL-5030 Software
Helps speed relay application by allowing you to develop relay settings offline, program SELogic® control equations, and analyze postfault event reports.