- Two-Winding Current Differential Protection
Sensitive current differential protection with programmable single- or dual-slope percentage restraint, supervised by the second- and fifth-harmonic elements for secure differential protection on two-winding apparatus. Choose from common or independent harmonic blocking or restraint. Unrestrained differential elements provide fast operation for high-magnitude internal faults. Automatic calculations of relay tap settings simplify application.
- Individual Winding Overcurrent Protection
Individual winding phase, residual, and negative-sequence overcurrent elements, including instantaneous, definite-time, and inverse time-overcurrent elements for comprehensive overcurrent protection.
- Protection and Control Logic
SELogic control equations with SELogic variables and timers facilitate traditional or advanced protection schemes.
- Monitoring and Reporting
Oscillographic event reports (up to ten 15-cycle reports) and metering functions eliminate or reduce external recorder and metering requirements.
- Serial Data Communications
Use the serial port for communications with ASCII terminals, local HMI, SCADA, or DCS systems. As an ordering option, select an EIA-232 or EIA-485 serial port. Through settings, select and configure the port for SEL ASCII and interleaved SEL Fast binary messages, or Modbus RTU Slave protocol.
- acSELerator QuickSet Software
Develop relay settings off-line, program SELogic control equations, and analyze post-fault event reports.