![]() Schweitzer Engineering Laboratories, Inc.Ī two-stage slope adapts automatically to external fault conditions, providing fast, sensitive, dependable, and secure differential protection, even for CT saturation and heavily distorted waveforms. Perform bay control functions for as many as five breakers and 20 disconnect switches using the built-in system mimic diagrams. Monitor and protect critical substation assets with comprehensive breaker wear and transformer thermal and through-fault monitoring. Make any overcurrent element directional using voltage polarized directional elements as torque control inputs to the overcurrent elements. Sel 487E Relay Instruction Serial Or Ethernetĭetect turn-to-turn winding faults for as little as two percent of the total transformer winding with the negative-sequence differential element.Īpply the two three-phase voltage inputs for over- and undervoltage, frequency, and voltshertz protection.If security and reliability are important factors for your engineering systems, OPC Server for IEC 61850 offers you a secure and reliable connection to a wide range of automation systems. Channel redundancy with multiple devices.Multiple communication channels at the same time for IEC 61850 Ethernet access (TCP/IP).Interoperable with HMI and Historians systems such as Citect, OSIsoft PI and any OPC client application.XML technology for saving configuration files.Easily configured by importing SCL Schema file into the server in two steps.Supports browsing of entire PLC data address space.Supports offline configuration (SCL files, IEC61850 parts 6-1).Supports unsolicited report-by-exception messaging using IEC61850 buffered and un-buffered reports.Client-Server Architecture using MMS over TCP/IP.Device Report Control Block (RCB) Timestamp.Monitoring the bytes received and transmitted between devices and the OPC server as OPC A&E simple events data.All IEC-61850 logical device, logical nodes, and Data attributes.Authorizing access to password protected devices.Enables OPC Clients that don't support structured writes to perform structured write operations by automatically building the Custom Structure.The ability to control remote device operations by performing Structured Writes to Control Blocks.SEL-487E-3, -4 Transformer Differential Relay Three-Phase Transformer Protection, Automation, and Control System Major Features and Benefits The SEL-487E Transformer Differential Relay provides three-phase differential protection for transformer applications. The SEL-387 Current Differential and Overcurrent Relay, SEL-487E Current Differential and Volt- age Protection Relay, and SEL-787 Transformer Protection Relay apply a. ![]()
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