Standard Feature
Model Option
Common features are not listed in this comparison. For more information, visit the product pages.
| Features | SEL-787 | SEL-787-2/-3/-4 |
|---|---|---|
| Display Front Panel | ||
| 5" Color Touchscreen Display, 800 × 480 Resolution | ||
| 8 Front-Panel Pushbuttons, Customizable | ||
| Supported Languages | (Spanish) | |
| CT/PT Inputs | ||
| Differential Current | 6 | Up to 12 |
| VS/VBAT Channel | 0 | Up to 1 |
| Differential and Restricted Earth Fault (REF) Elements | ||
| Differential Protection Windings (Standard) | 2 | 2, 3, or 4 |
| Differential Protection Windings (Winding 3 Configured for REF) | Up to 3 | |
| REF Elements (Winding 3 Configured for REF) | Up to 2 | |
| Protection Elements | ||
| 24 Overexcitation (Volts/Hertz) | (-2E/-3E/-3S) | |
| 25 Synchronism Check | (-3S) | |
| 27I Inverse-Time Undervoltage (Phase, Phase-to-Phase, Sequential, Vsync) | (-2E/-3E/-3S) | |
| 27P Undervoltage (Phase) With Inverse Characteristic | (-2E/-3E/-3S) | |
| 27PP Phase-to-Phase Undervoltage | (-2E/-3E/-3S) | |
| 27S VS Channel Undervoltage | (-3S) | |
| 32 Directional Power | (-2E/-3E/-3S) | |
| 50N Neutral Overcurrent | (-21/-2E/-3E) | |
| 51N Neutral Time Overcurrent | (-21/-2E/-3E) | |
| 51PC Combined Winding Phase Time Overcurrent | (-3E, -3S, -4X) | |
| 51GC Combined Winding Ground Time Overcurrent | (-3E, -3S, -4X) | |
| 59 (P,G,Q) Overvoltage (Phase, Ground, Neg. Seq.) | (-2E/-3E/-3S) | |
| 59PP Phase-to-Phase Overvoltage | (-2E/-3E/-3S) | |
| 59I Inverse-Time Overvoltage (Phase, Phase-to-Phase, Sequential, Vsync) | (-2E/-3E/-3S) | |
| 59S VS Channel Overvoltage | (-3S) | |
| 60LOP Loss of Potential | (-2E/-3E/-3S) | |
| 81 (O,U) Over-/Underfrequency | (-2E/-3E/-3S) | |
| Instrumentation and Control | ||
| Windings Protected | 2 | 2, 3, or 4 |
| 14 Digital Inputs Card Support | ||
| DFR Event Reports | 15 or 64 cycles | 15, 64, or 180 cycles |
| Data Acquisition | 16 samples/cycle | 32 samples/cycle |
| Frequency Tracking | 20–70 Hz | 15–70 Hz |
| Incoming GOOSE Message Support | 16 | 64 |
| RTU Remote Terminal Unit | ||
| PMU Synchronized Phasor Measurement | Up to 10 messages/second | Up to 60 messages/second at 60 Hz |
| Multiposition Disconnect Switches | ||
| Control Disconnect Switches From Bay Diagram | ||
| Firmware Downloads Via Ethernet | ||
| WEB Web Server | ||
| Substation Battery Monitor | ||
| Communications Protocols | ||
| IEC 61850 Edition 2 | ||
| IEC 60870-5-103 Protocol | ||
| EtherNet/IP | ||
| Parallel Redundancy Protocol (PRP) | ||
| IEEE 1588 Precision Time Protocol (PTP) | ||