| Features | SEL-T401L | SEL-411L | SEL-421 | SEL-311C | SEL-311L | SEL-387L | SEL-T400L | SEL-787L |
|---|---|---|---|---|---|---|---|---|
| Applications | ||||||||
| Distance Protection | ||||||||
| Line Current Differential | ||||||||
| Breaker Failure Protection | ƒ | ƒ | ||||||
| Undervoltage Load Shedding | ƒ | ƒ | ƒ | ƒ | ƒ | |||
| Series-Compensated Lines | ||||||||
| Protection | ||||||||
| Subcycle Distance Elements | ||||||||
| 21G Mho Ground Distance | ||||||||
| 21G Quad Ground Distance | ||||||||
| 21P Mho Phase Distance | ||||||||
| 21P Quad Phase Distance | ||||||||
| TD21 Incremental-Quantity Distance (Phase and Ground) | ||||||||
| TD32 Incremental-Quantity Directional | ||||||||
| TW32 Traveling-Wave Directional | ||||||||
| TW87 Traveling-Wave Differential | ||||||||
| 87L Line Current Differential | ||||||||
| 25 Synchronism Check | ||||||||
| 27/59 Under-/Overvoltage | ||||||||
| 49 Thermal | ||||||||
| 50 (N,G) Overcurrent (Neutral, Ground) | ||||||||
| 50P Phase Overcurrent | ||||||||
| 50Q Negative-Sequence Overcurrent | ||||||||
| 51 (N,G) Time-Overcurrent (Neutral, Ground) | ||||||||
| 51P Phase Time-Overcurrent | ||||||||
| 51Q Negative-Sequence Time-Overcurrent | ||||||||
| 67 (N,G) Directional Overcurrent (Neutral, Ground) | ||||||||
| 67P Phase Directional Overcurrent | ||||||||
| 67Q Negative-Sequence Directional Overcurrent | ||||||||
| 81 Under-/Overfrequency | ||||||||
| Programmable Analog Math | ||||||||
| Out-of-Step Block and Trip | ||||||||
| Load-Encroachment Supervision | ||||||||
| Switch-Onto-Fault | ||||||||
| Single-Pole Trip | ||||||||
| Zone/Level Timers | ||||||||
| Pilot Protection Logic | ||||||||
| Instrumentation and Control | ||||||||
| 79 Automatic Reclosing | ||||||||
| Number of Controlled Breakers | 2 | 2 | 2 | 1 | 1 | 1 | 2 | |
| Fault Locating | ||||||||
| Single-Ended Traveling-Wave Fault Locating | ||||||||
| Double-Ended Traveling-Wave Fault Locating | ||||||||
| Adaptive Autoreclose Cancel Logic for Hybrid Lines | ||||||||
| Line Monitor | ||||||||
| SELogic Control Equations | ||||||||
| Nonvolatile Latch Control Switches | ||||||||
| SELogic Remote Control Switches | ||||||||
| SELogic Local Control Switches | ||||||||
| Display Points | ||||||||
| Mirrored Bits Communications | ||||||||
| Substation Battery Monitor | ||||||||
| Breaker Wear Monitor | ||||||||
| Trip Coil Monitor | ƒ | ƒ | ƒ | ƒ | ƒ | |||
| Event Records (Multicycle Data) | ||||||||
| 1 MHz Sampling Event Records | ||||||||
| Sequential Events Recorder | ||||||||
| Instantaneous Metering | ||||||||
| DNP3 Level 2 Outstation | ||||||||
| Parallel Redundancy Protocol (PRP) | ||||||||
| IEEE 1588 Precision Time Protocol Version 2 (PTPv2) | ||||||||
| IEC 61850-9-2 Sampled Values Technology | ||||||||
| Time-Domain Link (TiDL™) Technology | ||||||||
| IEC 61850 Communications | ||||||||
| Synchrophasors | ||||||||
| Built-in Event Playback Testing | ||||||||
| SEL Fast Time-Domain Values | ||||||||
| Miscellaneous Features | ||||||||
| Connectorized (Quick Disconnect) Available | ||||||||
| Configurable Labels | ||||||||
| Custom Labels | ||||||||
Standard Feature
Model Option
ƒ This function may be created using settings