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This webinar describes event playback testing, a built-in feature available in the SEL-T400L Time-Domain Line Protection and the SEL-T401 Ultra-High-Speed Line Relay.
This application note discusses how to integrate the SEL-849 Motor Management Relay with a process controller using EtherNet/IP™ communications.
This application note describes SEL recommendations for wiring I/O in the euro-style connectors on SEL-2400, SEL-2200, and SEL-700 series devices.
Application Note: In industrial and commercial facilities, users need to interact with process and control equipment locally as well as remotely. Supervisory control and data acquisition (SCADA) systems provide
remote system control. A touchscreen human-machine interface (HMI) provides local user control and system monitoring. HMI screens also provide processed data in tabular, graphical, or animated format locally on the site. This application note describes the use of Modbus protocols to interface different SEL devices with third-party HMI touchscreens.
Application Note - This application note presents SEL logic devices, such as the SEL-2411 Programmable Automation Controller (PAC), SEL-2440 Discrete Programmable Automation Controller (DPAC), and SEL-3530 Real-Time Automation Controller (RTAC), as distributed control system solutions for one of the most fundamental sectors in the electrical generation industry—steam control.
Application Note - The SEL tough industrial computers with Windows Embedded Standard 2009 are designed for the types of applications that are needed in utility and industrial environments. SEL tough industrial computers with Windows have been performing reliably all over the world.
Application Note - The SEL-2523 Annunciator Panel provides complete alarming, notification, reporting, and communication of station alarms.
Application Note - Asset optimization tools are conveniently built into many SEL relays and monitoring devices, eliminating the need for extraneous devices. The SEL-487E Transformer Protection Relay has monitoring capabilities to optimize asset performance and reduce maintenance costs.
Application Note - This application note explains the value and benefit of inexpensive and robust dual-ring communications among remote sites via SEL Hop-Sync technology in the SEL-3031. Pairs of SEL-3031 radios located at each site and connected via SEL Hop-Sync technology provide continuous peer-to-peer communications simultaneously in both directions around the ring.
Application Note - Directional relays must be wired with proper current polarity (on the current transformer [CT] and relay terminal) in order to operate properly for faults. The polarity defines the forward direction of the directional protection elements of the relay. In many applications, the metering functions of digital relays are being used to replace separate supervisory control and data acquisition (SCADA) metering equipment. The direction of power flow (both watts and VARs) for this metering is also defined by the polarity of the CT circuit. This can create a problem because certain SCADA applications require the direction of power flow for metering to be opposite of the direction for protection elements. Automation math variables available in SEL-400 series relays can be used to invert the metering values for these applications.
This application note describes the SEL Network Global Variable List (NGVL) communications protocol and how it can be used within a decentralized control application to share data between processes.