Documentation

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Instruction Manual

SEL-387A Current Differential and Overcurrent Relay

Data Sheet

SEL-387A Current Differential and Overcurrent Protection Relay

Flyer

SEL-387A - Two-Winding Current Differential Protection

Literature

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Literature

Flyers

Featured SEL-387A - Two-Winding Current Differential Protection

SEL-9220 Fiber-Optic Adapter for SEL-300 Series Relays

Conformal Coating

Data Sheets

SEL-387A Current Differential and Overcurrent Protection Relay

Guideform Specifications

SEL-387A Current Differential and Overcurrent Relay

SEL-387A Current Differential and Overcurrent Relay

Instruction Manuals

SEL-387A Current Differential and Overcurrent Relay

Settings Sheets

SEL-387A DNP Settings Sheets

SEL-387A Settings Sheets

Ordering Information

Publications

Application Guides

Using Synchrowave Event to Model REF Elements and Troubleshoot Installations

Related Material

Troubleshooting Transformer Relay Installations With Synchrowave Event

Using Synchrowave Event to Model Transformer Differential With Harmonic Restraint and Blocking

Related Material

Maintaining Switched-Mode Relay Responsiveness in an RSTP Network

Visualizing Percentage-Restrained Differential Characteristics Using Synchrowave Event

Differential Protection of Transformers With an In-Zone Grounding Bank on the Delta Side

Introduction to SEL Relays for New Users

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

Selecting Transformer Compensation Settings for the SEL-387, SEL-487E, and SEL-787 Relays

Setting the SEL-387A REF Element for a Typical Medium-Voltage, Low-Resistance-Grounded Transformer

Technical Papers

Getting the Lines Crossed—How a Three-Phase Series Fault Caused a Sequence of Relay Operations

Drawings