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SEL-787 vs. SEL-787-2 Comparison

Standard Feature

Model Option

ƒ This function may be created using relay, device word bits, analog quantities, and timers.

Display/Front Panel
LCD Display, 2 × 16
5" Color Touchscreen Display, 800 × 480 Resolution 
4 Front-Panel Pushbuttons, Customizable 
8 Front-Panel Pushbuttons, Customizable 
Breaker Failure Protection
Transformer and Machine Current Differential
Low-Impedance Bus Differential
Underfrequency Load Shedding
Undervoltage Load Shedding
Three-Phase Current Inputs22
Three-Phase Voltage Inputs1+1+
Protection Elements
24 Overexcitation (Volts/Hertz)
27I Inverse Time Undervoltage (Phase, Phase to Phase, Sequential, Vsync) 
27PP Phase-to-Phase Undervoltage 
27/59 Under-/Overvoltage
32 Directional Power
49 Equipment Thermal Monitoring
50FO Flashover Protectionƒƒ
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
59PP Phase-to-Phase Overvoltage 
81 Under-/Overfrequency
87 Phase Differential
REF Restricted Earth Fault
Instrumentation and Control
SEL Mirrored Bits Communications
Event Report Retrieval Via Ethernet File Transfer 
IEC 60870-5-103 Protocol 
14 Digital Inputs Card Support 
SELogic Control Equations
Voltage Check on Closingƒ
Transformer Cooling Fan Controlƒƒ
Nonvolatile Latch Control Switches
SELogic Remote Control Switches
SELogic Local Control Switches
Display Points
Multiple Settings Groups
Substation Battery Monitor 
Breaker Wear Monitor 
Event Report (Multicycle Data)
Sequential Events Recorder
Instantaneous Meter
Demand Meter
Load and Temperature Profile Report
Resistance Temperature Detector (RTD) Inputs
IEEE C37.118 Synchrophasors
IEC 61850
IEC 61850 Edition 2 
Simple Network Time Protocol (SNTP)
Parallel Redundancy Protocol (PRP) 
Through-Fault Monitor
Thermal Model/SEL-2600 RTD Module Communications
Miscellaneous Features
Spanish Language Support 
Connectorized (Quick Disconnect) Available 


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