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Instruction Manual

SEL-387-0, -5, -6 Current Differential and Overcurrent Relay

Data Sheet

SEL-387 Current Differential and Overcurrent Protection Relay

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SEL-387 Current Differential and Overcurrent Relay

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Literature

Flyers

Featured SEL-387 Current Differential and Overcurrent Relay

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

Conformal Coating

Data Sheets

SEL-387 Current Differential and Overcurrent Protection Relay

Guideform Specifications

SEL-387 Current Differential and Overcurrent Relay

SEL-387 Current Differential and Overcurrent Relay

Instruction Manuals

SEL-387-0, -5, -6 Current Differential and Overcurrent Relay

Settings Sheets

SEL-387-0, -5, -6 Relay Commissioning Test Worksheet

SEL-387-0, -5, -6 Relay DNP Port—SET P Settings Sheets

SEL-387-0, -5, -6 Relay Settings Sheets

Ordering Information

SEL-387-0, -5, -6 Connectorized Relay

SEL-387-0, -5, -6 Relay

Wiring Harness for Connectorized SEL-387

Publications

Application Guides

Applying REF Protection With SEL-787 and SEL-387 Relays on Low-Impedance Grounded Transformers

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

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

Protecting Scott-Connected Transformers With SEL Transformer Differential Relays

Calculating and Testing Transformer Thermal-Model Constants

Related Material

Transformer Cooling Constants

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

Setting Winding Compensation for SEL-387 Relays Used for Bus Differential Protection

Three-Phase Restrained Differential Element Testing for the SEL-387 and SEL-787

Related Material

Test Point Calculation Spreadsheet

Testing the SEL-487E Relay Differential Elements

Related Material

SEL-487E Single Phase Test Current Calculator

Connection and Configuration of an SEL Communications Processor and an SEL-2410 I/O Processor to Obtain Measured Ambient and Top-Oil Temperatures for the SEL-387-6 Relay Thermal Element

SEL-387 Through-Fault Monitoring Application and Benefits

Setting an SEL-587 or SEL-387 Differential Relay to Protect a Mobile DABY Transformer

Connection and Configuration of an SEL Communications Processor and an SEL-2600A to Obtain Measured Ambient and Top-Oil Temperatures for the SEL-387-6 Relay Thermal Element

Bus Protection Using a Four-Winding Low-Impedance Percentage Differential Relay

Applying the SEL-387-5 Relay Combined Overcurrent Elements

Case Studies

Relays and Communications Processors Help Energize Barrie Hydro Expansion, Automation, and Transition to Open Market

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

Technical Papers

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

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