SEL-421
Overview
Overview
Documentation
Documentation
Specifications
Specifications
Support
Support
Configure and order
Documentation
Instruction Manual
SEL-421-4, -5 Protection, Automation, and Control System and SEL-400 Series Relays
Data Sheet
SEL-421-4, -5 Protection and Automation System
Flyer
SEL-421 Protection, Automation, and Control System
Application Guides
Applying SEL Relays in Systems With Inverter-Based Resources
Applying SEL-411L and SEL-421 Relays to Permissive Underreaching Transfer Trip (PUTT) Schemes
Applying the SEL-421 and SEL-411L With Delta and Open Delta VT Connections
Applying the SEL-421 Protection, Automation, and Control System Recloser on Adjacent Lines With Breaker-and-a-Half Bus Arrangement
Applying the SEL-421 Relay to Permissive Overreaching Transfer Trip Schemes
Basic Configuration of Sampled Values Using SEL-401 Merging Unit and SEL-421-7 SV Subscriber Relay
Circuit Breaker Monitoring Using the SEL-421 Relay
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Application Notes
Archive Wide-Area Information With Synchrophasors
Changing Metering Direction in SEL-400 Series Relays for SCADA Applications
Detecting Power System Islanding With Time Error Measurement
Estimating Power System Frequency With Synchronized Measurement
Generator Black-Start Restoration Using Synchronized Measurement
Certificates
SEL-421-4,5 IEC 61850 Edition 2 Conformance Certificate
SEL-421-4,5 IEC 61850 Edition 2 MICS
SEL-421-4,5 IEC 61850 Edition 2 PICS
SEL-421-4,5 IEC 61850 Edition 2 PIXIT
SEL-421-4,5 IEC 61850 Edition 2 TICS
SEL-421-7 IEC 61850 Edition 2 Conformance Certificate
SEL-421-7 IEC 61850 Edition 2 MICS
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Configurable Labels
SEL 400 Series Configurable Label Instructions
SEL-400 Series Configurable Label Template (Horizontal; A4)
SEL-400 Series Configurable Label Template (Horizontal)
SEL-400 Series Configurable Label Template (Vertical; A4)
SEL-400 Series Configurable Label Template (Vertical)
SEL-400 Series Enhanced HMI Configurable Label Template (Horizontal; A4)
SEL-400 Series Enhanced HMI Configurable Label Template (Horizontal)
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Flyers
SEL Digital Secondary System Solutions
SEL Time-Domain Link (TiDL) Technology
Guideform Specifications
SEL-421-4, -5 Protection, Automation, and Control System
Installation Guides
Installing IP52 Dust Protection for SEL-400 Series Panel-Mount Relays
SEL-400 Series TiDL Quick-Start Guide
Instruction Manuals
SEL-421-4, -5 Protection, Automation, and Control System
SEL-421-4, -5 Protection, Automation, and Control System and SEL-400 Series Relays
SEL-421-7 Protection, Automation, and Control System With Sampled Values or TiDL Technology
SEL-421-7 Protection, Automation, and Control System With Sampled Values or TiDL Technology and SEL-400 Series Relays
PDF
SEL-421 Front- and Rear-Panel Diagrams
Related Downloads
SEL-421-4, -5 DNP3 Device Profile Information
SEL-421-7 DNP3 Device Profile Information
Secure Content
SEL-287V0 to SEL-421-1 Application Example (.rdb)
Setting Mask Conversion 287V0 to 421-1 (.xls)
Technical Papers
Application Guidelines for Power Swing Detection on Transmission Systems
Applying Dependable and Secure Protection With Quadrilateral Distance Elements
Attack Tree Analysis of a Digital Secondary System in an Electrical Substation
Case Study: Comparative Analysis of Conventional Double Blinder and Rate-of-Change-of-Swing-Center Voltage Methods for Power-Swing Blocking During CFE Major Power-Swing Event
Catastrophic Breaker Failures Due to Missing Current Zero-Crossings in Highly Shunt-Compensated 500 kV Lines—Point-on-Wave, Reclosing, and Protection Considerations
Challenges and Solutions for Distance Elements Protecting Transmission Lines With Tapped Loads
Complete Monitoring Solution to Improve Reliability and Performance of Digital Secondary Systems
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White Papers
Best Practices for Implementing PTP in the Power Industry
Fly Safe and Level: Customer Examples in Implementing Dual Primary Protection Systems
SEL-421 Performance As Both a Protective Relay and a Phasor Measurement Unit
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