Standard Feature
Model Option
Common features are not listed in this comparison. For more information, visit the product pages.
| SEL-751A and SEL-751 Features | SEL-751A | SEL-751 |
|---|---|---|
| Display/Front Panel | ||
| 5" Color Touchscreen Display, 800 × 480 Resolution | ||
| 4 Front-Panel Pushbuttons With Tricolor LEDs, Customizable | ||
| 8 Front-Panel Pushbuttons With Tricolor LEDs, Customizable | ||
| CT/PT Inputs | ||
| Low-Energy Analog (LEA) Voltage Inputs | ||
| Applications | ||
| Undervoltage Load Shedding | ||
| Protection Elements | ||
| 27I Inverse Time Undervoltage | ||
| 49R Resistance Temperature Detector | ||
| 49T IEC Line/Cable Thermal Overload | ||
| 50INC Incipient Cable Fault Detection | ||
| 51G Residual Time-Overcurrent With Directional Control | ||
| 51N Neutral Time-Overcurrent With Directional Control | ||
| 51P Max. Phase Time-Overcurrent With Directional Control | ||
| 51Q Negative-Sequence Time-Overcurrent With Directional Control | ||
| 59I Inverse Time Overvoltage | ||
| 67G Residual Overcurrent With Directional Control | ||
| 67N Neutral Overcurrent With Directional Control | ||
| 67P Max. Phase Overcurrent With Directional Control | ||
| 67Q Negative-Sequence Overcurrent With Directional Control | ||
| 78VS Vector Shift | ||
| 81 Over-/Underfrequency | ||
| FLOC Fault Locator | ||
| HBL Second- and Fifth-Harmonic Blocking | ||
| HIF AST Arc Sense Technology (AST) High-Impedance Fault Detection | ||
| Load-Encroachment Supervision | ||
| Instrumentation and Control | ||
| Arc-Flash Detection inputs | 4 | 4 or 8 |
| Data Acquisition | 16 samples/cycle | 32 samples/cycle |
| Event Report | 15 or 64 cycles | 15, 64, or 180 cycles |
| Web Server | ||
| Firmware Download Via the Ethernet port | ||
| 14 Digital Inputs Card Support | ||
| Incoming GOOSE Messages Support | 16 | 64 |
| Synchronized Phasor Measurement | Up to 10 messages/second | 60 messages/second at 60 Hz |
| Fault Locator | ||
| Bay Control | ||
| Communications Protocols | ||
| IEC 61850 Edition 2 | ||
| IEC 60870-5-103 | ||
| Parallel Redundancy Protocol (PRP) | ||
| IEEE 1588 Firmware-Based Precision Time Protocol (PTP) | ||
| EtherNet/IP | ||
| HTTP | ||