Documentation

Featured

Instruction Manual

SEL-551 Overcurrent/Reclosing Relay

Data Sheet

SEL-551/SEL-551C Overcurrent and Reclosing Relay

Flyer

SEL-551 - Distribution Protection and Control

Literature

Documents sorted by newest first.

Literature

Flyers

SEL-551 - Distribution Protection and Control

Conformal Coating

Data Sheets

SEL-551/SEL-551C Overcurrent and Reclosing Relay

Guideform Specifications

SEL-551 Overcurrent/Reclosing Relay

SEL-551 Overcurrent/Reclosing Relay

Instruction Manuals

SEL-551 Overcurrent/Reclosing Relay

Settings Sheets

SEL-551 Relay Settings Sheets

Ordering Information

SEL-9918 Relay Package 551/501

SEL-551 Connectorized Relay

Wiring Harness for Connectorized SEL-551

SEL-9919 Relay Package 551/587

SEL-9920 Relay Package two SEL-551s

Publications

Application Guides

Using Python to Automate the SEL-551-to-SEL-851 Settings Conversion Process

Related Material

Defining DCE and DTE: Null Modem Cable and Straight-Through Cable Applications

Cold Load Pickup Scheme Using the SEL-551 Relay

Multiple Trip Outputs for SEL-351 and SEL-551 Relays

Using SELogic Control Equations in the SEL-551 and SEL-351 to Implement a Breaker Simulator for Testing

Using SELogic Control Equations to Replace a Sudden Pressure Auxiliary Relay

Case Studies

SEL Technology Improves Relay Response Under High Fault-Current Conditions

Relays Provide Critical Automation and Communications Features for Windsor Substation Upgrade and Auto Plant Transformer Stations

Relay’s Event Reports Offer Powerful Data for Diagnosing Power System Problems

Stanford University Installs Advanced Power System

Drawings