Standard Feature Model Optionƒ Function
| Key Features | SEL-587 | SEL-787-2/-3/-4 |
|---|---|---|
| Applications | ||
| Breaker Failure Protection | ƒ | |
| Transformer Current Differential | ||
| Low-Impedance Bus Differential | ||
| Underfrequency Load Shedding | ||
| Undervoltage Load Shedding | ||
| Three-Phase Current Inputs | 2 | 2, 3, or 4 |
| Three-Phase Voltage Inputs | 1+ | |
| Protection Elements | ||
| 24 Overexcitation (Volts/Hertz) | ||
| 25 Synchronism Check | ||
| 27I Inverse Time Undervoltage (Phase, Phase to Phase, Sequential, Vsync) | ||
| 27/59 Under-/Overvoltage | ||
| 32 Directional Power | ||
| 49 Equipment Thermal Monitoring | ||
| 50 (P,G,Q) Overcurrent (Phase, Ground, Neg. Seq.) | ||
| 50N Neutral Overcurrent | ||
| 51 (P,G,Q) Time-Overcurrent (Phase, Ground, Neg. Seq.) | ||
| 51N Neutral Time-Overcurrent | ||
| 81 Under-/Overfrequency | ||
| 87 Phase Differential | ||
| REF Restricted Earth Fault | ||
| Instrumentation and Control | ||
| Nonvolatile Latch Control Switches | ||
| SELogic Local Control Switches | ||
| Display Points | ||
| Multiple Settings Groups | ||
| Substation Battery Monitor | ||
| Event Report (Multicycle Data) | ||
| Load and Temperature Profile Report | ||
| Resistance Temperature Detector (RTD) Inputs | ||
| Built-In Web Server | ||
| IEEE C37.118 Synchrophasors | ||
| EtherNet/IP | ||
| IEC 61850 Edition 2 | ||
| Simple Network Time Protocol (SNTP) | ||
| Parallel Redundancy Protocol (PRP) | ||
| IEEE 1588 Precision Time Protocol Version 2 (PTPv2) | ||
| Through-Fault Monitor | ||
This table lists key features but is not comprehensive. For detailed information on each relay, visit the product pages: