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This webinar explains CT saturation in an intuitive way using simple animations and avoiding complex math and physics. We examine symmetrical and asymmetrical saturation, remanence, the equivalent circuit of a CT, and CT excitation graphs. We also…
Using shared tags in HMI development (also called “indirect tagging”) can decrease the number of HMI tags and diagrams (or screens) to optimize development, testing, deployment, and operation
of an HMI project. The SEL video “How to Use the RTAC HMI, Part 3: Shared Tags” demonstrates the basics of this concept. This application guide describes the process in full detail,
includes complete example projects for the RTAC and RTAC HMI, and shows you how to use shared tags.
This application guide shows how to calculate and test the operating time of inverse-time overcurrent protection elements. Use the accompanying spreadsheet to calculate curve operating times based on relay settings and applied current.
Application guide - How to Fix the HTTPS Untrusted Server Error on an SEL Web-Enabled Device
Application Guide - This application guide demonstrates steady-state, single-phase testing of the SEL-487E Transformer Protection Relay differential element and does not require state simulation. For a complete reference on testing this relay, refer to SEL Application Guide AG2010-07 .
Application Guide - This application guide provides an example of using basic information about the motor and power system to model the performance of the machine during starting.
This guide demonstrates how to use a script to automate updating passwords for local user accounts on multiple SEL-3610, SEL-3620, or SEL-3622 devices.
This application guide discusses how to provide redundant communications to human-machine interface (HMI) or SCADA systems between two SEL Real-Time Automation Controllers (RTACs). It also includes RTAC example configurations that can be downloaded from the SEL website.
This application guide shows how to reduce effort and complexity when performing common device management tasks (such as upgrading firmware) for the SEL Real-Time Automation Controller (RTAC).
This application guide provides a brief overview and then explains the core concepts of QuickSet Design Templates through several Job Done® examples of increasing difficulty. Each completed example is included in an .rdb file that accompanies this application guide.
Application Guide - This application guide describes a test procedure for the thermal element in the SEL-710 Motor Protection Relay and provides test parameters using specific relay settings. While this application guide specifically addresses the SEL-710, the same procedure can be used for testing other SEL motor relays. The instruction manual for each relay includes details on the specific thermal model used. The test procedure outlined is applicable for SEL-710 Relays with firmware version R200 or newer.