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Adaptive two-stage slope for fast, sensitive, and secure differential protection.
Combined harmonic blocking/restraint for security during magnetizing inrush conditions.
Sensitive negative-sequence differential elements for detecting winding faults.
Three independent REF elements for sensitive ground-fault detection.
Feature for transformer applications in ring-bus or breaker-and-one-half systems.
Covers distance elements, adaptive overcurrent, and reverse power flow protection.
Synchronism check function and details on input/output scaling and CT levels.
Discusses Ethernet access, serial communication, automation, and synchrophasor data.
Covers breaker/battery monitoring, DSS technologies, and IEC 61850-9-2LE SV relay.
Details TiDL relay operation, communication disabling, and settings groups.
Covers PRP, IEC 61850 modes, PTP, event recording, and increased security.
Allows configuration and analysis of fault records using Grid Configurator.
Explains the SEL-487E's role as an SV subscriber connecting to merging units.
Describes the adaptive slope characteristics and operation of the differential element.
Focuses on detecting turn-to-turn winding faults using negative-sequence current.
Covers V/Hz protection capabilities, including frequency tracking and custom curves.
Details mho and quadrilateral distance elements for transformer and line protection.
Explains adaptive time-overcurrent elements with selectable curves and reset characteristics.
Describes the logic for detecting and blocking distance elements during power swings.
Focuses on sensitive detection of ground faults in transformer windings.
Explains the function to prevent breaker closing when phases are out of sync.
Covers current unbalance detection and fault phase identification logic.
Describes using the SEL-487E-5 with a TiDL Merging Unit for autotransformer protection.
Details using the SEL-487E for comprehensive protection of six feeders.
Explains using the SEL-487E as a synchrophasor measurement and recording device.
Describes the LCD, LEDs, pushbuttons, and navigation for the front panel interface.
Covers bay control capabilities, including one-line diagrams and breaker/disconnect control.
Explains operating circuit breakers directly from the front panel using one-line diagrams.
Details the display functionality for rack-type circuit breakers.
Describes programmable status and trip target LEDs on the front panel.
Covers displaying and managing alarm conditions via the front panel LCD.
Allows custom screens showing metering values, text, and status information.
Details Ethernet card capabilities, network protocols, and port configurations.
Describes Telnet, FTP, DNP3 LAN/WAN, and PTP for relay access and synchronization.
Covers SNTP time sync, PRP redundancy, and HTTP web server access.
Explains IEC 61850 for interoperability and substation automation.
Details GOOSE messages, MMS services, and IEC 61850 data server capabilities.
Describes bidirectional relay-to-relay digital communication for coordination.
Lists and describes various protocols like ASCII, IEEE C37.118, MIRRORED BITS, IEC 61850.
Covers using SELOGIC for panel control, RTU wiring, latching relays, and indicator lights.
Explains using SELOGIC for advanced control logic, aliases, and automation.
Details accessing metering information like voltage, current, and power quantities.
Simplifies post-fault analysis with event reports and Sequential Events Recorder (SER).
Captures voltage, current, and status data at high sampling rates for fault analysis.
Provides concise event summaries and SV stream statistics for troubleshooting.
Monitors battery systems and schedules breaker maintenance based on contact wear.
Monitors transformer temperature, insulation aging, and loss-of-life quantities.
Monitors through-fault currents to assess transformer stress and schedule maintenance.
Illustrates the 4U front panel layout with controls and indicators.
Shows rear panel connections for SV subscriber and TiDL relay configurations.
Provides dimensions for rack-mount and panel-mount chassis.
Details interface board capabilities and power supply voltage options.
Covers operating parameters, environmental specs, and compliance standards.
Lists supported protocols and Ethernet card options with speeds.
Provides contact information for Schweitzer Engineering Laboratories.
A section for general notes related to the document.
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