Generator Protection
Generator protection products and systems provide complete primary and backup protection for all types of generator faults. They are suited for use in utility-, industrial-, and commercial-scale power generation systems.
Protective Relays
These relays can be applied alone or combined for a complete generation protection solution.
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System Components
Combining these components with generation relays expands their functionality.
Generator Protection Features
| Features | SEL-400G | SEL-300G | SEL-700G | SEL-700GT | SEL-700GW | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| Applications | ||||||||||
| Generator Protection | ||||||||||
| Unit/Overall (Generator and Generator Step-Up [GSU]) Differential Protection | ||||||||||
| Independent GSU Transformer Protection | ||||||||||
| Pumped-Storage Hydro Protection | ||||||||||
| Integrated Synchronizer | ||||||||||
| Breaker Failure Protection | ƒ | |||||||||
| Equipment Thermal Monitoring | ||||||||||
| Generator Intertie Protection | ||||||||||
| Feeder Protection | ||||||||||
| Protection | ||||||||||
| 21C Compensator Distance | ||||||||||
| 21C Compensator Distance | ||||||||||
| 21P Phase Mho Distance | ||||||||||
| 24 Overexcitation (Volts/Hertz) | ||||||||||
| 25 Synchronism Check | ||||||||||
| 27/59 Under-/Overvoltage | ||||||||||
| 27I/59I Inverse-Time Undervoltage/Overvoltage | ||||||||||
| 32 Directional Power | ||||||||||
| 40 Impedance-Based Loss-of-Field | ||||||||||
| 40 Capability-Based Loss-of-Field | ||||||||||
| 46 Current Unbalance | ||||||||||
| 46 Harmonic Current Unbalance | ||||||||||
| 49 Thermal Model | ||||||||||
| 49R Thermal Overload (RTD) | ||||||||||
| 50 (P,N,G) Overcurrent (Phase, Neutral, Ground) | ||||||||||
| 50Q Negative-Sequence Overcurrent | ||||||||||
| 51 (N,G) Time-Overcurrent (Neutral, Ground) | ||||||||||
| 51 (P,Q) Time-Overcurrent (Phase, Neg. Seq.) | ||||||||||
| 60 Loss-of-Potential | ||||||||||
| 60 Voltage Balance Loss-of-Potential | ||||||||||
| 60 (P,N) Independent Split-Phase (Phase, Neutral) | ||||||||||
| 64G 100 Percent Stator Ground | ||||||||||
| 64G Intermittent Ground Fault Detection | ||||||||||
| 64F Field Ground | ||||||||||
| 67 (N,G) Directional Overcurrent (Neutral, Ground) | ||||||||||
| 67Q Negative-Sequence Directional Overcurrent | ||||||||||
| 78 Out-of-Step | ||||||||||
| 78 Dual Zone (Generator and System) Out-of-Step With Pole Slip Counters | ||||||||||
| 78VS Vector Shift | ||||||||||
| 81 Over-/Underfrequency | ||||||||||
| 81R Rate-of-Change-of-Frequency | ||||||||||
| 87 Stator Differential | ||||||||||
| Transformer Differential | ||||||||||
| REF Restricted Earth Fault | ||||||||||
| Separate Neutral Overcurrent | ||||||||||
| Inadvertent Energization | ƒ | |||||||||
| Flashover Protection | ƒ | ƒ | ||||||||
| Instrumentation and Control | ||||||||||
| SELogic Control Equations/Remote Control Switches | ||||||||||
| Nonvolatile Latch Control Switches | ||||||||||
| Multiple Settings Groups | ||||||||||
| Station Battery Monitor | ||||||||||
| Breaker Wear Monitor | ||||||||||
| Event Report (Multicycle Data)/Sequential Events Recorder | ||||||||||
| Disturbance Recording (up to 300 seconds) | ||||||||||
| Demand Meter | ||||||||||
| Load Profile Report | ||||||||||
| RTD (Resistance Temperature Detector) Inputs | ||||||||||
| Ethernet | ||||||||||
| Built-In Web Server | ||||||||||
| EtherNet/IP | ||||||||||
| IEEE 1588 Precision Time Protocol (PTP) | ||||||||||
| IEC 61850 | ||||||||||
| IEC 61850 Edition 2 | ||||||||||
| IEC 60870-5-103 | ||||||||||
| Parallel Redundancy Protocol (PRP) | ||||||||||
| DNP3 Serial | ||||||||||
| DNP3 LAN/WAN | ||||||||||
| Simple Network Time Protocol (SNTP) | ||||||||||
| Modbus TCP | ||||||||||
| Modbus RTU Outstation | ||||||||||
| IEEE C37.118 Synchrophasors | ||||||||||
| Synchrophasor Protocol Edition | C37.118 2011 | C37.118 2005 | C37.118 2005 | C37.118 2005 | ||||||
| Mirrored Bits Communications | ||||||||||
| Miscellaneous Features | ||||||||||
| Dual Frequency Zones (Generator and System) | ||||||||||
| Frequency Tracking Range | 5–120 Hz | 20–70 Hz | 15–70 Hz | 15–70 Hz | 15–70 Hz | |||||
| Accepts Wye or Open-Delta Voltage Transformers | ||||||||||
| Connectorized (Quick Disconnect) Available | ||||||||||
Standard Feature
Model Option
ƒ This function may be created using settings