Os Relés de Proteção de Alimentadores SEL-751 e SEL-751A com recursos para detecção de arco voltaico (referidos coletivamente neste documento como Relé SEL-751) combinam a tecnologia de detecção de luz com a proteção de sobrecorrente rápida para fornecer detecção de arco voltaico em alta velocidade.
Este guia de aplicação descreve a operação dos
elementos de falta à terra restrita (REF: “Restricted Earth Fault”) dos Relés
de Proteção de Transformador SEL-787, SEL-787-3 e SEL-787-4, habilitando os
usuários a testar os elementos com sucesso.
Este guia de aplicação descreve os elementos direcionais do Relé de Proteção de Alimentador SEL-751, e aborda a forma de controle dos elementos de sobrecorrente instantâneos de fase e de sequência-negativa. O guia também discute como testar estes elementos.
Este guia de aplicação demonstra como usar os dados obtidos em uma operação de fechamento do disjuntor para calcular a velocidade de propagação da onda viajante e como garantir resultados precisos do TWFL. Este guia mostra também como gerar uma estampa de tempo TW (“Traveling Wave” – Onda Viajante) para permitir o cálculo manual simples da localização da falta quando o canal de comunicação do diferencial estiver fora de serviço ou não existir.
Guia de Aplicação - Este guia de aplicação demonstra como parametrizar corretamente a proteção e validar a operação de um motor compressor de 25 HP através do SEL-849 usando lógica de ajuste de fábrica e valores dos dados da placa de identificação do motor.
Guia de Aplicação - Ao testar um elemento diferencial, recomenda-se usar apenas a corrente de uma fase. Embora este teste não simule condições reais de um sistema, ele fornece uma prova adequada de que o relé foi ajustado conforme desejado. Além disso, a prática do teste monofásico simplifica o teste, tornando-o adequado para todos os equipamentos de teste, uma vez que nem todos possuem seis canais de corrente para executar um teste das três fases.
Os atuais relés de proteção incorporam diversas funções de controle, medição e monitoramento, além de suas conhecidas funções de proteção. Neste guia, trataremos de uma das funções de monitoramento mais importante dos relés de proteção, porém pouco utilizada por engenheiros de proteção: o monitoramento do banco de baterias da subestação.
Guia de Aplicação - Instruções para a instalação e o uso do software synchroWAVe Event SEL-5601-2015
Este guia demonstra um procedimento passo-a-passo para efetuar o download dos relatórios das partidas do motor de um Relé de Proteção de Motores SEL-710 e visualizá-los em um computador pessoal (PC).
Este guia de aplicação explica o processo de testes do elemento quadrilateral de fase para uma falta trifásica equilibrada.
O software SEL-5032 pode ser aplicado a todos os relés de proteção, módulos e processadores de lógicas SEL que possuem compatibilidade com a norma IEC 61850. Sua instalação é bastante simples e todas as atualizações do software estão disponíveis, de forma gratuita, no website da SEL.
O software acSELerator Quickset – SEL-5030 é uma poderosa ferramenta para realização de ajustes, análises de eventos e visualização de relatórios e medições fornecidas pelos IEDs (Intelligent Electronic Devices) da SEL. O softwar pode ser aplicado a todos os principais relés de proteção, medidores, módulos e rádio, sendo que as atualizações de versões e drivers estão disponíveis, de forma gratuita, no website da SEL.
Este guia irá apresentar o princípio de funcionamento da função de sincronização automática presente no relé de proteção SEL-700G. Será mostrado exemplo de aplicação no qual serão abordados os principais ajustes e lógicas relacionadas.
O guia apresenta uma lógica para o acompanhamento de manutenção preventiva em motores elétricos através dos recursos lógicos do relé SEL-710.
Guia de Aplicação - A porção harmônica do elemento diferencial do Relé de Proteção de Transformadores SEL-787 opera de forma diferente do que no Relé de Sobrecorrente e Diferencial de Corrente SEL-387 e no Relé Diferencial de Corrente SEL-587, porém de forma similar ao Relé de Proteção de Transformadores SEL-487E. O SEL-787 permite que o usuário habilite ambas as funções de bloqueio e restrição por harmônicos em paralelo. Isso proporciona uma operação segura durante condições de inrush, fornecendo, ao mesmo tempo, os benefícios de trip das funções comuns de bloqueio e restrição por harmônicos.
Guia de Aplicação - Este guia de aplicação mostra o teste monofásico, em regime, do elemento diferencial do Relé de Proteção de Transformadores SEL-487E, o qua não requer a simulação de estado. Para uma referência completa sobre o teste deste relé, consulte o Guia de Aplicação AG2010-07-PT: Testes dos Elementos Diferenciais do Relé SEL-487E.
Este guia de aplicação demonstra um método simples para testar a função REF do SEL-487E com a injecção de corrente de estado estável monofásica.
Este guia de aplicação mostra como ajustar o SEL-487V para uma aplicação de um banco sem fusível usando diferencial de tensão.
Este guia de aplicação tem o objetivo de apresentar uma importante ferramenta disponível nos relés digitais, a oscilografia.
Guia de Aplicação - Este guia de aplicação descreve um procedimento de teste do elemento térmico do Relé de Proteção de Motores SEL-710 e fornece parâmetros de teste usando ajustes específicos do relé. Embora este guia de aplicação seja especificamente dirigido ao SEL-710, o mesmo procedimento pode ser usado para testar outros relés de motores da SEL. O manual de instrução de cada relé inclui detalhes sobre o modelo térmico específico utilizado. O procedimento de teste descrito é apropriado para os Relés SEL-710 com a versão de firmware R200 ou mais recente.
Guia de Aplicação - Este guia de aplicação utiliza uma aplicação como exemplo para ilustrar como ajustar o SEL-710 para substituir os relés eletromecânicos existentes.
O submódulo 11.4 dos Procedimentos de Rede do ONS estabelece as diretrizes básicas para a definição de projetos básicos de Sistemas Especiais de Proteção – SEP.
A detecção de condutores rompidos em redes de distribuição de energia elétrica não é uma tarefa simples de ser executada, especialmente quando o método de detecção é baseado na medição de correntes e tensões em um só ponto do alimentador, geralmente esta medição é realizada na saída do alimentador na subestação.
As componentes simétricas são usadas para calcular as condições de desbalanço de um sistema trifásico usando somente o cálculo monofásico.
O conhecimento de análise de circuitos trifásicos é de suma importância para detecção de fiação invertida proveniente de transformadores de corrente (TCs) ou transformadores de tensão (TPs).
Guia de Aplicação - Este artigo fornece as diretrizes para as situações em que os equipamentos da SEL são estocados sem a embalagem selada de fábrica ou por longos períodos de tempo.
Guia de Aplicação - A porção harmônica do elemento diferencial do Relé de Proteção de Transformadores SEL-487E opera de forma diferente do que no Relé de Sobrecorrente e Diferencial de Corrente SEL-387 e no Relé Diferencial de Corrente SEL-587. O SEL-487E permite que o usuário habilite ambas as funções de bloqueio e restrição por harmônicos em paralelo. Isso proporciona uma operação segura durante condições de inrush, fornecendo, ao mesmo tempo, os benefícios de trip das funções comuns de bloqueio e restrição por harmônicos.
Guia de Aplicação - Este guia de aplicação descreve as diferenças entre o Relé de Proteção de Transformadores SEL-387 e o Relé de Proteção de Transformadores SEL-487E. O guia também descreve um método para testes dos elementos diferenciais usando uma corrente monofásica.
O Relé Diferencial de Barra e Falha de Disjuntor SEL-487B utiliza dinamicamente duas características de inclinação (“slope”) porcentual. A característica da Inclinação 1 (valor defaul 60%) é usada durante faltas internas. O relé chaveia dinamicamente para a Inclinação 2 (valor default 80%) durante condições de faltas externas. A característica da Inclinação 2 também é conhecida como modo de alta segurança.
Guia de Aplicação - Os relés de distância SEL oferecem, geralmente, elementos de distância de terra quadrilateral (“quad”), bem como elementos de distância de terra mho. Os elementos quad são normalmente aplicados para detectar faltas à terra resistivas que os elementos mho não podem ser ajustados para alcançar. Este guia de aplicação descreve as características básicas desses elementos e aborda algumas questões comuns relativas aos respectivos testes.
Guia de Aplicação - Todos os relés da SEL são fabricados com um número variado de entradas isoladas opticamente que podem ser usadas nas equações de controle SELogic ou ser designadas para diferentes funções.
Guia de Aplicação - Corrente de magnitude surpreendentemente elevadas podem circular nos cabos de comunicação metálicos quando os mesmos se encontram próximos a circuitos de alta corrente.
Este guia tem como objetivo mostrar os recursos disponíveis nos relés de proteção utilizados em média e baixa tensão, que possibilitam aumentar a segurança de operadores e mantenedores e reduzir danos materiais em eventos envolvendo arco elétrico em cubículos e centros de controle de motores (CCMs) de média e baixa tensão.
Este guia mostra como configurar a função de sobrecarga térmica para cabos associados a linhas de transmissão, para fazer a estimativa da temperatura do condutor
Certas faltas fazem com que as correntes decaiam com o tempo fazendo com que a corrente falta no período de regime (“steady-state”), após alguns ciclos, possa ser menor que a corrente nominal do sistema (menor do que 1 pu). Isso significa que um relé de sobrecorrente temporizado ajustado com um valor de pickup maior do que a corrente nominal de carga para um transformador, não opere para curto-circuito em seus terminais. Antes que o relé opere, a corrente já se tornou consideravelmente menor do que o pickup do relé.
O princípio da proteção diferencial é de que a soma das correntes que entram na zona de proteção deve ser igual à soma das correntes que saem desta zona.
O guia apresenta a lógica para criação de um disparo rápido e seletivo para a proteção de operadores e eletricistas de manutenção contra o arco voltaico em cubículos de disjuntores de painéis de média tensão e baixa tensão.
This application guide demonstrates how to connect multiple SEL-849 Motor Management Relays to a single SEL-3421 or SEL-3422 Motor Relay Human-Machine Interface (HMI) through use of a communications selector switch.
Application Guide - The SEL-311L Line Current Differential System line current differential (87L) function provides fast and sensitive line protection by comparing line terminal current measurements through a synchronized communications path. Testing this relay at one line terminal with the line still in service without disabling the 87L function will very likely cause a line current differential trip at all line terminals.
This application guide demonstrates how to use SEL-2411 Fast Analog Logic blocks to provide fault indication on radial feeder applications.
This application guide describes the settings necessary to configure the SEL-3620 Ethernet Security Gateway to authenticate users via RADIUS protocol by referring requests to a Cisco ISE server.
This application guide shows how to add difference voltage supervision to the built-in synchronism-check element using math variables and SELogic control equations in the SEL-751 and SEL-751A Relays.
This application guide instructs the user on the connections to the devices, the configuration of the ports on the SEL-2488 or SEL-2407, and verification that the IRIG signal is received on the IED.
This application guide describes how to perform a fast and simple retrofit of D20 RTU installations by intercepting existing field termination I/O signals with pre-built cables and connecting them to the SEL-2240 Axion I/O modules.
This application guide shows how to view voltage values from the inactive voltage source on an SEL-451 Relay.
This application guide shows how a simple TCM alarm can be created using SELogic® control equations in an SEL-351, SEL-451, or SEL-751 Relay when only a 52A breaker contact is available.
This Application Guide explains how to use an SEL-2431 with SELogic control equations to restrict the voltage regulation range of a voltage regulator for high load conditions.
McAfee Embedded Control is a useful security tool for embedded computers with limited CPU and memory resources. It is also useful for computers that do not have access to continuous software updates. Its primary protection mechanism is a process called whitelisting, which limits the execution of software on a computer to a set of trusted applications. In addition to whitelisting, it also provides memory and file system protection. This application guide summarizes how many of the McAfee Embedded Control features work so that the user can make informed decisions when evaluating, setting up, or fine-tuning an installation. It also provides basic guidelines for installation, monitoring, and troubleshooting.
This application guide shows how to configure the SEL-3031 Radio with various SEL relays by using Mirrored Bits communications to create high-speed protection schemes.
This application guide proposes new settings guidelines for the negative-sequence and zero-sequence impedance-based directional elements used in many SEL relays.
This application guide shows how set an SEL-751 or SEL-751A Feeder Protection Relay to accommodate cold load inrush while still protecting the circuit. It discusses the settings needed for the scheme as well as several methods of enabling the scheme.
This application guide discusses how to retrieve and reset energy metering data from various SEL relays using the Flex parsing method.
This application guide describes how a local battery test can be achieved using a pushbutton on the front panel of the SEL-651R Advanced Recloser control and SELogic control equations.
This application guide provides an example for setting the custom Modbus user map in the SEL-734 Advanced Metering System and SEL-735 Power Quality and Revenue Meter. It also includes a unique application example using a real-time automation controller (RTAC) with the FileIO Library to programmatically read a text file containing the custom user map and write the user map to the meter via Modbus.
This application guide describes the steps necessary to program an SEL-700 series relay to identify a specific, faulty resistance temperature detector (RTD).
This application guide describes how volts/hertz protection can be easily provided using SELogic® control equations in the SEL-751A.
This application guide explores how to send alarms to the SEL-2523 via communications protocols. Integration examples are used from systems using SEL communications processors, Modbus® programmable logic controllers (PLCs), DNP3 Level 2 Outstation (DNP3), and Mirrored Bits® communications.
This application guide discusses two methods for detecting open-phase conditions (monitoring the amount of negative-sequence current present in a system and checking the system voltages) with SEL-751 and SEL-751A Feeder Protection Relays.
This application guide describes the available test modes, Test Mode operation, and how to use the Test Mode feature within the SEL-411L.
This application guide describes how to program an SEL Real-Time Automation Controller (RTAC) to perform fast automatic controls using the crosspoint switch method while providing supervisory control and data acquisition (SCADA) functions at the same time.
This application guide describes the steps necessary to configure an SEL Real-Time Automation Controller (RTAC) with firmware Version R134 or later to extract information from a Davis weather station.
This application guide shows how the Custom Calculations engine in synchroWAVe Event 2015 Software can be used to validate SEL relay directional elements.
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.
This application guide describes how to configure the SEL-2032 Communications Processor to retrieve resistance temperature detector (RTD) thermal metering data from various SEL relays using Flex parse.
This application guide describes the settings required to create a virtual private network (VPN) tunnel using X.509 certificates generated with an OpenSSL-based software called X Certificate and key management (XCA).
This application guide describes the ICON® transfer trip module and provides step-by-step instructions to back up ICON nodes before making any configuration changes in a system. It also describes provisioning a circuit between two nodes in the ICON network and testing the circuit to verify proper operation.
This application guide shows how to provide arc-flash protection to a motor control center (MCC) by transferring the output of the time-overlight® element in an SEL-849 Motor Management Relay to an SEL-751A Feeder Protection Relay using IEC 61850 GOOSE.
When the SEL-3530 RTAC uses SEL Protocol to poll an SEL device, it must have knowledge of the ACC (and sometimes 2AC) level password of the “child” relay to perform event retrieval, fast breaker, and other command operations. If the SEL-3620 performs a password update on the SEL device, the SEL-3620 must update the RTAC internal database with the child’s new ACC and 2AC passwords or risk the RTAC losing operational visibility on the child relay. This application guide focuses on developing the necessary logic to solve the problem.
This application guide demonstrates how to configure the SEL-849 to provide overcurrent protection for a feeder protection application.
This application guide details the hardware, connection, and device settings required to allow the SEL-3530 Real Time Automation Controller to communicate with the IQ 250/260 meter using a two-wire EIA-485 point-to-point connection.
This application guide provides settings recommendations for phase directional elements in wind farm applications using the SEL-351S.
This application guide demonstrates how to configure the power supply of the SEL-734 Revenue Meter or the SEL-735 Power Quality and Revenue Meter to use two ac voltage sources.
Application Guide - New firmware, available for select SEL relays, provides unprecedented protection response in the presence of highly distorted or saturated CT waveforms. Overcurrent protection has never been this powerful and flexible.
This application guide discusses how to apply a three-phase lockout scheme using three SEL-351RS Kestrel® Single-Phase Recloser Controls.
This application guide describes how to create 50G and 50Q elements using SELogic® control equations for the SEL-487B Bus Differential and Breaker Failure Relay.
This application guide discusses how to configure the SEL-751A Feeder Protection Relay to make Modbus polls more efficient than using the fixed Modbus map. Configuration of other SEL-700 series relays is very similar.
Application guide - How to Fix the HTTPS Untrusted Server Error on an SEL Web-Enabled Device
This application guide describes the procedure to tune a generic proportional integral derivative loop for Real-Time Automation Controllers (RTACs) by applying the lambda internal model control (IMC) tuning rule.
This application guide describes the different RAID configurations that the SEL-3355 Computer is capable of and how to configure, monitor, and maintain a RAID for optimal system reliability, availability, and serviceability.
This application guide describes how to use the SEL Backup and Recovery Tool (BaRT) to back up and restore an SEL rugged computer operating system.
This application guide shows how the custom calculation engine in synchroWAVe® Event 2015 SEL-5601-2015 Software can be used to mimic the relay algorithm and plot the compensated currents and operate and restraint quantities using a compressed filtered winding event report from an SEL-387 or SEL-787.
This application guide explains how to configure IEC 60870-5-103 protocol parameters in compatible SEL-700 series relays.
This application guide details the steps to calculate valid test quantities for Zone 1 elements when series-compensation logic is enabled in the SEL-421 Protection, Automation, and Control System and SEL-411L Advanced Line Differential Protection, Automation, and Control System.
This application guide provides the steps required to add new accounts, change account passwords, and delete existing accounts in acSELerator RTAC® SEL-5033 Software.
This application guide discusses how to configure the SEL-3622 to notify users of an intrusion into a cabinet in which the SEL-3622 is installed by setting the optical sensor, accelerometer, and binary input to generate a syslog event and trigger the alarm contact.
This application guide demonstrates how to configure the SEL-3530 Real-Time Automation Controller (RTAC) to convert a synchrophasor message sent over an SEL Fast Message stream to an IEEE C37.118-2005 data message.
This application guide describes the process of decoding real-time automation controller (RTAC) serial line and SEL protocol captures using Wireshark®.
This application guide describes how to test the voltage-restrained time-overcurrent element (51V) in an SEL-700G Generator Protection Relay. A similar test procedure can be followed for the SEL-300G Generator Relay (firmware Version R240/R320 and later).
This application guide describes how to enable VLANs in the SEL-2730M 24-Port Managed Ethernet Switch, including how to create a VLAN, assign specific ports to a VLAN, update a VLAN, and create a tagged VLAN for GOOSE applications.
This application guide describes the necessary revisions to a new SEL-351R-4 Recloser Control settings file after it is converted from an existing SEL-351R-2 settings file.
This application guide demonstrates how to configure acSELerator Team® SEL-5045 Software to poll an SEL-2032 Communications Processor fault register and collect events from downstream SEL relays.
This application guide discusses some of the error sources that may limit the quadrilateral ground distance element, and it also discusses settings guidelines to ensure proper operation.
This application guide describes how to effectively manage time in an SEL Real-Time Automation Controller. It includes information about time synchronization protocols, system time synchronization, time signal distribution, and device data time-stamp management.
This application guide describes how to test the characteristics of the differential elements in an SEL-411L relay and provides the tools to calculate the currents to be injected into the relay to validate the differential scheme.
This application guide provides an introduction to virtualization and presents step-by-step instructions to build a virtual server using VMware vSphere® ESXi™ and Microsoft Hyper-V® Server.
This application guide provides a step-by-step procedure for testing the high-impedance fault detection algorithms in the SEL-751 Feeder Protection Relay and SEL-451 Protection, Automation, and Bay Control System.
This application guide describes the procedure to set directional overcurrent elements in SEL-351 series relays.
This application guide discusses how to use the accelerometer and light sensor in the SEL-3505 and SEL-3505-3 to integrate physical security monitoring.
This application guide provides a simple explanation of how the negative-sequence directional element works as well as a basic procedure for testing the element.
This application guide describes how to approximate trigonometric functions and square roots using SELogic control equations in SEL-700 series relays.
This application guide shows how to alter the default logic of the SEL-651R design template for G&W Viper-ST®, G&W Viper-LT®, and Elastimold® MVR 32-pin reclosers to either automatically enable reclosing or return reclosing to its previous state after the hot-line tag (HLT) function is disabled.
This application guide discusses how to install an SEL-9192 on Microsoft® Windows® 7 32-bit and 64-bit operating systems, as well as how to customize
the settings for operation with a SubSTATION Server™ port server application.
Application Guide - This application guide explores enhancements for applications that use circuit breakers and lockout relays. Specifically, it addresses how to reconfigure the output contacts to distinguish between normal stop and protection scheme trip conditions.
This application guide demonstrates how to configure an SEL-700 series relay and an RTAC for data concentration, and how to set up an RTAC-embedded HMI for display.
This application guide demonstrates how to configure the SEL-2411 Programmable Automation Controller and a Real-Time Automation Controller (RTAC) to read and write a sample set of analog values using customizable Fast Message data regions and remote analogs.
This application guide provides instructions for selecting the proper currents to inject for three-phase testing of the restrained differential element of an SEL-387 or SEL-787 Relay.
This application guide provides step-by-step instructions to perform acSELerator Team event collection using Secure Shell (SSH) protocol.
This application guide discusses how to use the SEL-451 Protection, Automation, and Bay Control System as a backup overcurrent relay to a transformer differential relay.
This application guide aids the user in deploying a network intrusion detection system using a rugged computing platform.
This application guide discusses how to use the SEL-3010 Event Messenger with an XLink BT Cellular Bluetooth Gateway to convert incoming computer text messages to voice messages delivered by telephone when an analog telephone line is not available.
This application guide describes how to apply logic available in the SEL-735 Power Quality and Revenue Meter to detect and take action for harmonic currents exceeding those specified in IEEE 1547.
This application guide discusses how to configure the SEL-2411 Programmable Automation Controller to use remote bits and SELogic® control equation variable timers to accomplish remote control over pulsed output contacts.
This application guide provides recommendations for installation and grounding practices to reduce the chance of radio system damage from lightning in field installations.
The purpose of this application guide is to show how an RTAC and its HMI can provide alarm acknowledgement.
This application guide describes the programming and use of a custom command line interface (CLI) in an RTAC legacy mode engineering access point. The custom CLI mimics an older-style SEL-2000 series Communications Processor CLI to achieve a greater variety of available commands and information.
Application guide - This application guide provides a proof-of-concept LDAP configuration walkthrough with Windows Server® 2008 R2 Standard as a central authentication server (CAS) using Microsoft® Active Directory® Domain Services.
This application guide demonstrates how to configure central authentication via Lightweight Directory Access Protocol (LDAP) on SEL LDAP-supported devices, briefly reviews LDAP server requirements, and discusses in detail the LDAP settings on SEL devices as well as troubleshooting techniques.
This application guide provides an introduction to fiber-optic terms and guidance in specifying fiber-optic interface options for SEL products or for ordering SEL fiber-optic cables.
Application Guide - This application guide outlines the procedure to uninstall and reinstall acSELerator QuickSet® SEL-5030 Software and associated programs when the software or Device Manager plugin locks up, fails to update through SEL Compass®, or otherwise behaves erratically.
This application guide clarifies the SEL-2431 Voltage Regulation Control communications options and focuses on using DNP3 for serial and Ethernet communications.
This application guide discusses the potential uses for Intel® Active Management Technology (AMT) on SEL industrial computers.
This application guide describes how to implement protocol conversion in the SEL-3505 and SEL-3505-3 Real-Time Automation Controllers (RTACs) between both serial and Ethernet communications links for control and monitoring applications.
This application guide details the calculations that you can use to create a program that plots impedance loci using SEL event reports and includes a quick-start example using a real event report.
This application guide describes the steps for creating a project in the SEL-3530 Real-Time Automation Controller (RTAC) that enables the RTAC to accept DNP3 messaging from SEL WSO-10 Wireless Sensor for Overhead Lines devices.
This guide provides proof-of-concept configurations for an open source Lightweight Directory Access Protocol (OpenLDAP™) server intended to be used for centralized user authentication by SEL LDAP-enabled devices.
This application guide describes how to pull SEL-5010 Relay Assistant Software database information into acSELerator QuickSet® SEL-5030 Software for additional device management and customization options.
This application guide describes how to configure Ethernet-to-serial mapping on the SEL-3610 Port Server and how to use the mapping for engineering access or RTAC connectivity to serially connected devices.
This application guide provides instructions on how to decrypt the SEL-3620, SEL-3622, and SEL-3610 XML configuration file, make offline settings changes, and re-encrypt the settings file so it can be imported into a device.
This application guide describes fundamental Permissive Overreaching Transfer Trip scheme applications with the SEL-321 Phase and Ground Distance Relay, as well as a number of different scheme variations and the protection philosophy behind each variation.
This application guide describes the steps to edit data points owned by SUBNET SubSTATION Server™ in the SEL rugged computers by using Microsoft® Excel®.This process is useful when multiple changes are needed to customize the database.
This application guide describes the malware protection and the alarm and logging capabilities exe-GUARD™ technology provides. This guide also suggests how to build appropriate incident response actions around this technology.
This application guide demonstrates how to create a counter that stores data in nonvolatile memory by using latches in a binary form.
This application guide documents the online monitoring feature of the SEL-421 Protection, Automation, and Control System for its associated circuit breakers. By routinely collecting, processing, and reporting critical information from circuit breakers, the relay can monitor breaker performance and conditions and provide early indication of possible problems with the breaker.
This application guide explains how to use a script to easily update the firmware on one or more SEL-3610, SEL-3620, or SEL-3622 devices.
This application guide provides the information and settings required to operate an SEL ICON® OC-3 link over an Alcatel-Lucent® 9500 Microwave Packet Radio (MPR) system, describes radio applications, and reviews latency test results of applications.
This application guide describes the settings necessary to configure the SEL-3620 Ethernet Security Gateway to authenticate users via RADIUS protocol by referring requests to an RSA Authentication Manager 7.1 SP4.
This application guide describes the settings necessary to configure the SEL-3620 Ethernet Security Gateway to authenticate users via RADIUS protocol by referring requests to a Microsoft® NPS server.
This application guide describes the settings necessary to configure the SEL-3620 Ethernet Security Gateway to authenticate users via RADIUS protocol by referring requests to a FreeRADIUS server.
This application guide describes the settings necessary to configure the SEL-3620 Ethernet Security Gateway to authenticate users via RADIUS protocol by referring requests to a Cisco Secure ACS server.
This application guide provides an overview of how to use the SEL RxTx BLUETOOTH® Application for mobile devices on an Android™ tablet to wirelessly connect to SEL relays via the SEL-2924 Portable BLUETOOTH Serial Adapter.
This application guide presents an example of how to set up an SEL-2414 Transformer Monitor for basic transformer monitoring and fan control.
This application guide discusses how to configure the SEL-487B Bus Differential and Breaker Failure Relay for a simple two-zone bus with differential and breaker failure protection.
This application guide explains how to use scripts to easily configure the SEL-3620 Ethernet Security Gateway to provide for secure emergency access when technicians cannot log in to devices using centrally managed accounts.
This application guide provides field personnel with instructions for collecting event reports from SEL protective relays.
Application Guide - This application guide describes how to use a Python script to set managed device passwords from an exported JSON-formatted managed device passwords report.
This application guide describes how to apply an SEL-2890 Ethernet Transceiver to add DNP3 capability using Ethernet to devices that only have DNP3 capability through serial ports.
This application guide provides system designers with reference information on the performance of specific SEL fiber-optic interfaces for Ethernet products.
This application guide provides the settings necessary to accomplish tripping during Hot Line Tag conditions that is faster than that provided by the default settings in the the SEL-351S, SEL-351R, and SEL-651R.
Application Guide - This application guide provides a step-by-step procedure on how to connect to SEL relays using acSELerator QuickSet.
Application Guide - An event report is a stored record of what a relay saw and how it responded during a system fault or other disturbance. The ability of digital relays to record and display event reports provides protection engineers with a powerful tool for analyzing the nature of power system disturbances and the related performance of protection and interrupting devices. These reports are used with various devices to enhance and automate the analysis, testing, evaluation, and simulation of power systems and related protection schemes during fault and disturbance conditions.
Application Guide - This application guide details the configurations and settings required to add cryptographic protection to the SEL-3620 Ethernet Security Gateway using the SEL-3025 Serial Shield®.
Date Code 20131030 SEL Application Guide 2011-18 Application Guide Volume VII AG2011-18 Basic and Advanced Applications of the SEL-3530 RTAC Access Point Router Mark Diehl INTRODUCTION The access point router in the SEL-3530 Real-Time Automation Controller (RTAC) is one of the more powerful features of the RTAC. In thi
A common application of transformer differential relays is the protection of a delta-wye power transformer. The current entering the primary side of the transformer is compared to the current leaving the secondary side. The transformer causes a phase shift between the primary and secondary currents, which must be accounted for in the relay settings. The purpose of this application guide is to develop an understanding of the phase shift and explain how to derive it for any installation. This application guide provides general information on deriving the phase shift, followed by a detailed example.
This application guide provides step-by-step instructions on how to set up port stream mirroring in the SEL-362x.
Application Guide - The SEL-735 Power Quality and Revenue Meter can accumulate pulses from gas, water, steam, or any other pulse output flow meters and store data to internal load profile (LDP) recorders. The acSELerator Team® SEL-5045 Software can then poll and download these data for storage and reporting. This application guide describes how to use SELogic® control equations to program the accumulation functions in the SEL-735 and how to configure an LDP recorder to display and store accumulated data.
Application Guide - As the SEL-2020, SEL-2030, and SEL-2032 Communications Processors have been available for years, many users have existing installations with these products and are familiar with their capabilities for communicating with what are now known as legacy devices. A legacy device may be defined as an older product that lacks certain functionality offered by a current version of the device. Many of these legacy devices require special customization to ensure full interoperability with current equipment.
Application Guide - This application guide briefly discusses the NERC (North American Electric Reliability Corporation) PRC-002-2 device requirements. It also describes and shows how to configure the SEL disturbance recording system that meets PRC-002-2 requirements.
This application guide is a Job Done example of an IEC 61850 protocol configuration for five substations that are part of a large refinery. It describes the IEC 61850 driver and OPC server configurations, Configured IED (intelligent electronic device) Description (CID) file configuration for nine different SEL relays, and the content of the report control block for each CID file. Ultimately, all areas were fine-tuned to optimize the network traffic and satisfy the communications design requirements.
Application Guide - The purpose of this paper is to document the process by which SEL Compass® software is configured to obtain updates for SEL Compass packages from the SEL website on a Server PC and store these updates on a network location where Client PCs can obtain the updates without having to connect to the SEL website or have internet access.
Application Guide - Panel meters provide annunciation of critical electrical parameters. Some meters can only show a single measurement quantity, such as demand current and voltage minimum and maximum. An advanced meter, however, can display multiple sets of electrical values and replace up to three individual panel meters. This saves initial capital and panel space and brings the benefits of data trending and power quality disturbance recording.
Date Code 20130812 SEL Application Guide 95-10 Application Guide Volume II AG95-10 Configuration and Fast Meter Messages Tim Tibbals and David Wood OVERVIEW This application guide describes special messages that are not included in the Communications Section of SEL relay instruction manuals. The instruction manuals des
Date Code 20130808 SEL Application Guide 2013-11 Application Guide Volume IV AG2013-11 Implementing Inverse-Time Overcurrent Elements Using the X Current Channels in the SEL-487V Larry Wright INTRODUCTION The SEL-487V Capacitor Protection and Control System provides a comprehensive suite of protection, control, and aut
Date Code 20130808 SEL Application Guide 2002-23 Application Guide Volume III AG2002-23 Applying Two SEL-351S Relays to Provide Automatic Source-Transfer for Critical Loads Mike Collum and Ken Behrendt INTRODUCTION The SEL-351S Relay is ideally suited to provide automatic source-transfer control for critical loads. Cri
Date Code 20130801 SEL Application Guide 2012-09 Application Guide Volume VI AG2012-09 MV-90 xi Integration With an SEL-735 Meter: Applying TIM_735A and Communicating Via the SEL Protocol Victor Love and Sean Colligan INTRODUCTION This application guide presents an example of how to configure an SEL-735 Power Quality a
Application guide - This application guide provides detailed information on how to implement this SPR blocking scheme using the SEL-751A.
Application Guide - All SEL microprocessor-based products with EIA-232 serial communications ports support ASCII communication. This feature permits simple and reliable communication with the product from a personal computer. Most new laptop computers, however, do not include a serial port. Because many legacy devices in substations require an EIA-232 serial port, it is necessary to find a suitable USB-to-serial converter to bridge between the computer and serial device.
Application Guide - This application guide uses an example to describe how to configure acSELerator Team® SEL-5045 Software and an SEL-735 Power Quality and Revenue Meter to poll and report meter data. acSELerator Team is a database-driven software that collects and stores load profile (LDP) metering data and voltage sag, swell, and interruption (VSSI) data from compatible SEL meters.
Application Guide - The SEL-3530 Real-Time Automation Controller (RTAC) can collect events from relays and store 512 events in its own internal, nonvolatile memory. The acSELerator Team® SEL-5045 Software can directly connect to the RTAC and collect all of these events instead of making individual connections to each relay.
Application Guide - In the event that acSELerator QuickSet locks up, fails to update through SEL Compass®, or otherwise behaves erratically, the most expedient solution may be to simply uninstall and reinstall acSELerator QuickSet and associated programs. This application guide outlines the procedure.
Application Guide - This application guide discusses PRC-002-2 and how several SEL relays process voltage and current inputs as well as digital inputs in order to meet the NERC requirements.
The purpose of this application guide is to define common digital logic symbols used in SEL instruction manuals. Examples of how each symbol is used in SEL relay logic are included.
Application guide - SEL manufactures many devices with standard or optional fiber-optic communications ports. This application guide summarizes information in tables to guide readers in determining the compatible SEL fiber-optic cables and interoperable devices.
This application guide discusses setting up dial-up protection using acSELerator QuickSet.
The purpose of this application note is to advise users how to view and reset the watchdog counters before placing the SEL-411 into service upon commissioning or after routine maintenance testing. Note that the relays must have firmware version R108 or greater and that all terminals must have the same firmware version.
Application Guide - With the SEL-3530 Real-Time Automation Controller (RTAC), a wide variety of communications schemes can be integrated into an industrial automation network, including some that were not possible with the SEL-2030 and SEL-2032 Communications Processors.
Application Guide - This application guide describes the automatic clearing of the front-panel target LEDs following a normal stop.
Application guide - This application guide describes how to calculate fault locations using voltages and currents from all line terminals and a Microsoft® Excel® spreadsheet that is available for download with this
application guide at http://www.selinc.com. This method is more accurate than the single-ended method as long as the data are stable.
This application guide demonstrates how to set a relay used in an application where the relays do not have the same nominal current. This application guide demonstrates how to perform the correct adjustments in the CTR_X, 87LPP, 87L2P, and 87LGP settings to compensate for the nominal current mismatch between a 5 A nominal current relay and a 1 A nominal current relay.
Application Guide - The SEL-311L Line Current Differential System is a digital line current differential relay with an integrated communications interface. The SEL-311L-1,-7 Instruction Manual, available at http://www.selinc.com, demonstrates how to set and test an application consisting of two SEL-311L Relays protecting a line when each relay receives current from a current transformer (CT) with the same CT ratio (CTR). However, when the CTRs do not match, setting and testing the application are more complex. This application guide explains the issues that arise during this type of scenario, as well as how to compensate for them in settings and testing procedures.
This application guide demonstrates how to map OPC data from a non-IEC 61850-compliant SEL device into a manufacturing message specification (MMS) format in order to make the non-IEC 61850-compliant SEL device look like an IEC 61850-compliant SEL device.
Application Guide - This application guide uses a G&W Vacuum Interrupter (Type 3 [trip module]) as an example to describe the process of programming the SEL-2032 to retrieve data using the Modbus RTU protocol.
Application Guide - Vacuum bottle interrupters are known to lose vacuum. If a vacuum bottle that has lost vacuum is opened to interrupt current, the vacuum bottle will likely fail violently. This violent failure may cause damage to nearby equipment and poses a safety hazard to those working in the area. This application guide describes logic that can be written in the SEL-351R Recloser Control to recognize this failure and open an upstream interrupting device.
Application Guide - The SEL-311L Line Current Differential System is a digital line current differential relay with an integrated communications interface. A typical two-terminal line application consists of two SEL-311L Relays. Direct communication between the relays is performed through a fiber-optic cable at a distance of up to 120 kilometers. When this distance is longer than 120 kilometers, a third SEL-311L may be used as a pseudo repeater. This can extend the application of direct fiberoptic cable to lines up to 240 kilometers long.
The SEL-451 Protection, Automation, and Bay Control System has extensive logic and protection features, allowing it to be used for many applications. This application guide describes how to implement a motor bus transfer scheme in the SEL-451 for a two-source configuration.
Application Guide - This application guide explains how to implement SEL-651R Advanced Recloser Control settings to detect high-side blown fuse/open-phase conditions to trip the recloser(s) to prevent or minimize damage.
Application Guide - This application guide documents the steps necessary to perform Flex parsing of data from SEL intelligent electronic devices (IEDs) for cases where the existing SEL Fast Message 20 messages (e.g., 20METER and 20TARGET) do not return the desired data.
Application Guide - Geomagnetically induced currents (GICs) are caused by solar flares ejected from the surface of the sun. Solar storms peak with a periodicity of approximately 11 years and are numbered based on the first observed storm in the nineteenth century. The sun is presently entering its twentyfourth solar cycle, with a maximum expected in the year 2013. However, major solar flares can occur anytime in the solar cycle.
Application Guide - Many smaller generator installations are designed with a single voltage transformer (VT) and a single current transformer (CT) at the generator. Fully redundant protection cannot be implemented in such designs. As a result, a single microprocessor-based relay provides generator protection. The standard operating procedures for these installations require the generator to be taken offline if the relay malfunctions.
Application Guide- The SEL-68 is no longer in production and does not have a modern functional equivalent.Modern microprocessor-based relays are now more powerful and versatile, and the logic in the SEL-68 can be replaced using the freeform logic found in the SEL-421 Protection, Automation, and Control System.
Application Guide - This application guide describes how to create a project in the SEL-3530 Real-Time Automation Controller (RTAC) that enables the RTAC to accept temperature data from an SEL-2600 RTD Module.
Application Guide - This application guide provides the equations and logic needed to program the IEC 255-8 thermal models into SEL relays using advanced SELogic control equations.
Application Guide - This application guide describes the four information report models available in a SISCO AX-S4 MMS OPC Server as applied to all IEC 61850-compliant SEL devices. The four types of report models are None, PollInfo, Immediate, and Timed.
Application Guide - This application guide shows how to calculate single- and three-phase power factors, as well as their lead/lag status, in a communications processor.
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.
The purpose of this application guide is to show how to compare the current and voltage readings from primary and backup relays in order to automate maintenance to meet the PRC-005-2 requirements.
Application Guide - In this application guide, we review the application of an SEL-387L and SEL-311L for line current differential protection of a two-terminal line with different CT ratios at both ends. We provide relevant protection settings for both relays and some notes on commissioning procedures, including the results of a MET command from both relays during normal load conditions.
Application Guide - This application guide will explain how to install and program the SEL-2411 to perform power calculations using measurements from only two power phases.
Application Guide - This application guide presents an example of how to configure an SEL-734 Advanced Metering System to function with the Itron MV-90® xi meter-reading software.
Application Guide - In this application guide, several examples are presented for delta-connected high-side windings and wye-connected low-side windings similar to the examples used in AG2000-01.
Application Guide - This application guide discusses how to use the SEL-351 Relay and SEL-351R Recloser Control instead of RTUs.
Application Guide - This application guide gives examples of using advanced SELogic control equations to create several useful functions.
Application Guide - This application guide demonstrates how to configure custom maps on the SEL-2701 Ethernet Processor in the SEL-2030 or SEL-2032 using the SEL-5020 Settings Assistant Software. It also provides an example of a configured custom map for Port 17 of the SEL-2032 and the steps required to send the map to the SEL-2701 via the Settings Assistant as well as HyperTerminal® using the Ymodem protocol.
Application Guide - The SEL-2431 Voltage Regulator Control is a flexible device designed to control many popular voltage regulators with minimal settings needed. In some bidirectional mode applications, it is desirable to have the SEL-2431 initiate automatic tap-to-neutral logic to prevent under- or overvoltage conditions from persisting for an extended time on lightly loaded circuits.
Application Guide - This application guide discusses applying the SEL-421 in permissive overreaching transfer trip (POTT) schemes.
Application Guide - The SEL-651R Advanced Recloser Control builds upon the success of the SEL-351R Recloser Control by providing new features and wider applicability. Apply the SEL-651R in urban and rural distribution systems for increased system reliability. The SEL-651R can be connected to both existing traditional reclosers and newer, single-phase trip- and reclose-capable reclosers.
Application Guide - This application guide demonstrates how to employ SEL products on U.S. Air Force civil engineering industrial control systems (ICS) to satisfy the information assurance (IA) requirements as specified in Air Force Engineering Technical Letter (ETL) 09-11.
Application Guide - A common power transformer configuration for industrial plants supplying radial mediumvoltage distribution systems uses delta-wye power transformers that are low-resistance grounded to reduce the single-line-to-ground fault current magnitude. Typically, the single-line-to-ground fault current magnitude is limited to 400 A by sizing the neutral grounding resistor accordingly.
Application Guide - SEL has developed a simple and inexpensive islanding detection scheme (IDS) for the SEL-751A Feeder Protection Relay to provide HMD functionality. The IDS detects an Aurora event and sends a trip signal faster than any other available HMD, while maintaining the IDS security. Additionally, the IDS can provide a blocking signal to reclosing relays during an attack. This application guide provides detailed information on how to implement the SEL IDS along with traditional protection elements using the SEL-751A.
Application Guide - The SEL-487B Bus Differential and Breaker Failure Relay provides differential protection for as many as six single-phase zones and includes circuit breaker failure protection for up to six three-phase circuit breakers. Advanced zone selection logic in the SEL-487B uses disconnect auxiliary contacts to automatically reconfigure bus protection zones during disconnect switch operation. This application guide discusses how to configure the SEL-487B for a simple zone-switching bus differential application in a basic two-bus station.
Application Guide - This application guide describes the configuration and settings for the SEL-5041, SEL-5040, SSNET, SEL communications processors, and SEL IEDs for automatic event notification through a modem connection.
Application Guide - This application guide addresses the use of the SEL-587 Relay to protect a two-winding power transformer with delta connected high-side windings and wye-connected low-side windings.
It is common to enable a sensitive, directionally supervised phase overcurrent element for nonline protection applications, such as on the low-voltage side of a dual-sourced transformer. Great care must be taken when setting SEL-351 series relays in these non-line protection applications in order to maintain security and still provide the intended sensitive operation. This application guide discusses the settings required to establish the desired security and sensitivity.
Application Guide - Each SEL-487B Bus Differential and Breaker Failure Relay provides differential protection for as many as six single-phase zones and includes circuit breaker failure protection for as many as six three-phase circuit breakers. This guide uses acSELerator® QuickSet® SEL-5030 Software to create a settings file. acSELerator QuickSet is a Microsoft® Windows®-based program that allows for creating,exchanging, downloading, and uploading relay settings.
Application guide - The SEL-121F, SEL-121S, SEL-121-0, SEL-221F, SEL-221S, and SEL-221-16 Relays were designed in the 1980s and include phase and ground distance elements. There is not enough processing power in an eight-bit microcontroller to check all of the distance elements (AB, BC, CA, AG, BG, and CG) for each zone during every one-quarter-cycle processing interval. Therefore, these relays use a method for faulted phase identification that is described in this application guide.
Using the SEL-3378 Synchrophasor Vector Processor (SVP), you can create a synchrophasorbased measurement network with any relay capable of performing synchrophasor measurements. This application guide details the hardware, connections, and device settings of such a network using an SEL-421 Protection, Automation, and Control System and an SEL-351S Protection System (not the Legacy SEL-351S Protection and Breaker Control Relay), because these products are among the more commonly used SEL relays. You may also apply this guide to the setup of other relays that support IEEE C37.118.
This application guide shows how to use the SEL-2030 or SEL-2032 Communications Processor for gathering synchrophasor data from various SEL relays to verify proper phasing, polarity, and wiring connections.
Application Guide -This application guide discusses the application of the Directional Comparison Blocking (DCB) logic in the SEL-421-0 and SEL-421-3 Protection, Automation, and Control Systems.
Application Guide - This document provides useful information about the application, setting, and benefits of the through-fault monitor found in the SEL-387 series of SEL transformer differential protection relays.
Application Guide - This document describes how to program an SEL-2032 or an SEL-2030 Communications Processor to accept thermal data from an SEL-2410 device and reformat these data for output to an SEL-387-6 serial port. This document also includes an example for optional retrieval of the thermal data from the SEL-387-6 by the SEL-2032/SEL-2030.
Application Guide - Synchrophasor applications traditionally use data streamed from either direct serial (local substation) or Ethernet (local substation to wide area) communications equipment. Substation owners may already have installed unused SCADA (supervisory control and data acquisition) circuits, such as Voice Grade 6 (VG-6) circuits, that can provide an economical alternative to the cost and installation of new communications equipment.
Application Guide - This application guide explains how to apply the out-of-step logic for out-of-step blocking, unblocking, and tripping schemes.
This application guide details the steps necessary to create a current unbalance detection function in the SEL-451 Protection, Automation, and Control System’s freeform logic. Current unbalance
can result from small variations in system voltage or unequal phase loading. Alarm and trip thresholds for current unbalance percentage (UB%) are created.
The SEL-734P Advanced Power Quality Meter can capture and store over 100 power system events. Easily configure the SEL-734P for automatic event retrieval from a centrally located server using acSELerator® Report Server™ SEL-5040 Software. This application guide covers basic settings in both the SEL-734P and acSELerator Report Server.
The SEL-5076 synchroWAVe Archiver Software provides an easy and convenient method to record and archive synchrophasor data in comma-separated value (CSV) and COMTRADE
formats. By using IEEE C37.118 protocol, the software either accepts data from a single phasor measurement unit (PMU), concentrates data from up to four PMUs, or accepts a concentrated data frame from a phasor data concentrator (PDC). To help manage file sizes, users can archive the entire data set at the incoming data rate or choose a subset of data and/or a slower data rate.
Application Guide - Using the SEL-587 Current Differential Relay, it is possible to apply differential protection to a wye-wye transformer with abnormal bushing connections and phase shift. This guide discusses what type of current transformers (CTs) must be applied and how the CT connection and relay settings compensate for the phase shift to properly protect the transformer.
Application Guide - Application of traditional connections (e.g., transformer windings connected in wye and CTs in delta, or transformer windings connected in delta and CTs in wye) involves no modification of current inputs to differential calculations in the SEL-487E Relay.
Application Guide - The SEL-3332 serves as a protocol gateway and data concentrator for communication between the substation intelligent electronic devices (IEDs) and the master control center. The control center uses serial and/or IP communication protocols in SubstationSERVER.NET to concentrate data and send controls to the IEDs.
Application Guide - This application guide describes the minimum settings required for the SEL-2431 in a basic application on a radial single-phase voltage regulator.
Application Guide - In many integration systems, it is not uncommon to have more relays than can be connected to a single SEL-2032 or SEL-2030 Communications Processor.
Application Guide - This application guide provides settings for programming voltage reduction to occur on a daily schedule where it will enable at 10:00 am on one day and disable at 10:00 am the following day.
Application Guide - This application guide covers the minimum software settings required for a traditional radial feeder application.
Application Guide - This application guide assists with model selection and describes product operation.
Application Guide - It is possible to use a DABY transformer in a mobile application where the phase-to-bushing connection sequence may vary from substation to substation.
Application Guide - This application guide provides settings to program remote SCADA control and local operator control for Voltage Reduction and Auto Inhibit modes.
Application Guide - This application guide provides details on how to connect the PTs to the relay and set the relay appropriately.
Application Guide - This application guide presents an example of how to configure an SEL-734 Meter to function with the Itron MV-90® meter reading software.
Application Guide - This application guide explains how to select and apply these different reset characteristics for the first-tap definite-time delay, F_TD1 or R_TD1.
Application Guide - Mirrored Bits® communications is an innovative technique that provides low-cost, high performance communications directly between relays.
Application Guide -This guide explains how to implement Schweitzer Engineering Laboratories, Inc. (SEL) Mirrored Bits® communications over a variety of communications media.
Application Guide - The SEL-547 Distributed Generator Interconnection Relay is a low-cost, utility-grade relay used when connecting smaller generators to the utility.
Application Guide - The motor application of the SEL-501 Relay provides two separate and independent relays in one compact case.
Application Guide - This application guide describes how a front-panel pushbutton of an SEL-351S Protection and Breaker Control Relay can be used to enable and disable Arc-Flash Hazard Energy-reducing protection.
Application Guide - Using acSELerator Quickset to load settings into an SEL-351S relay is typically a straightforward process with few problems provided the relay model number and setting version number match the relay being placed into service.
Application Guide - Use this application guide to use the SEL-5010 Relay Assistant and to troubleshoot difficulties you may have during, and immediately following, installation.
Application Guide - The SEL-387 family of relays can be used to provide bus differential protection for simple buses.
Application Guide - The SEL-587Z High-Impedance Differential Relay provides very fast detection of bus faults.
Application Guide - A lockout alarm for the SEL-351R Recloser Control may be easily implemented using SELogic® control equations.
Application Guide - This guide discusses how to program a separate check zone that is easy to configure and which asserts only a single Relay Word bit, thus avoiding unintentional breaker tripping.
Application Guide - As outlined in SEL Application Guide AG2000-18, Grounded Shunt Capacitor Bank Protection Scheme Using SEL-287V and SEL-352 Relays, shunt capacitor banks connected to a power system can reduce electrical power transmission costs, reduce system losses, and provide better use of the electrical network.
Application Guide - This application guide provides the information needed to configure SEL relays and communications processors equipped with an Ethernet Processor so Telnet and FTP (File Transfer Protocol) can be used with the Ethernet Processor module in a substation network.
Application Guide - The SEL-321 Phase and Ground Distance Relay includes a Load-Encroachment function designed to prevent long reaching phase distance elements from tripping under heavy load conditions.
Application Guide - The SEL-421 Protection, Automation, and Control System can be applied as a single breaker automatic recloser when there is only one breaker for the protected line or as a two-breaker automatic recloser when there are double breakers for the protected line.
Application Guide - The SEL-587 Current Differential Relay may be applied to provide split-phase differential protection in synchronous motors and generators.
Application Guide - The SEL-451 Protection, Automation, and Control System can be applied as a single-breaker automatic recloser when there is only one breaker for the protected line or as a two-breaker automatic recloser when there are double breakers for the protected line.
Application Guide - In a main and transfer bus arrangement, one can use a bypass breaker to take a line breaker out of service and maintain system integrity.
Application Guide - This application guide will review the operation of the 61G1 and 64G2 elements and discuss measurements that are recommended to ensure proper settings are made.
Application Guide - This document describes how to program an SEL-2032 or an SEL-2030 Communications Processor to accept temperature data from an SEL-2600A RTD(remote thermal device) module and reformat these data for output to an SEL-387-6 Relay serialport.
Application Guide - This document provides a basic description of the use of the load-encroachment element to supervise overcurrent elements in SEL relays.
Application Guide - The SEL-451 and SEL-421 Protection, Automation, and Control Systems have the flexibility to provide both protection and control functions in one system.
Application Guide - In any pilot protection scheme, it is often desirable to block tripping of the pilot elements but still allow the built-in backup elements to provide protection.
Application Guide - This application guide focuses on acquiring metering data from the SEL-701 Motor Protection Relay and displaying the values on a digital meter.
Application Guide - This application guide addresses the considerations for selecting CTs in relays with firmware versions that do not incorporate the Adaptive Overcurrent Elements, and contrasts this with considerations for selecting CTs in relays that have the Adaptive Overcurrent Elements.
Application Guide - This application guide provides information and settings required to extract tap position indication from an INCON 1250 Programmable Position Monitor via an SEL communications processor.
Application Guide - This application guide provides the information needed to configure an SEL-2020/2030/2032 Communications Processor, an SEL-2890 Ethernet Transceiver (optional), and the SEL I/O Server for substation HMI and/or SER use via serial or Ethernet communications.
Application Guide - System grounding varies from utility to utility and from voltage level to voltage level.
Application Guide - The SEL-701 Motor Protection Relay is equipped with two levels of instantaneous undervoltage elements, two levels of instantaneous overvoltage elements, and one residual overvoltage element.
Application Guide - The SEL-451 Relay has the speed, power, and flexibility to combine the control and protection of many substation devices into one economical system.
Application Guide - This application guide describes the configuration and settings for the SEL-5040, SEL communications processors, and SEL IEDs for the connection types listed below.
Application Guide - This application guide discusses these conditions and how to make simple settings modifications to provide you with information that is more complete, if desired.
Application Guide - This application guide provides an overview of various ways you can connect and use multiple communications processors at a single site.
Application Guide - In July 2000, improvements were made to the original loss-of-potential (LOP) logic supplied in the SEL-321 Phase and Ground Distance Relay.
Application Guide - Each SEL-487B Relay provides differential protection for as many as six single-phase zones and includes circuit breaker failure protection for as many as six three-phase circuit breakers.
Application Guide - The default battery test logic in the SEL-351J Recloser Control uses three timers cascaded to produce a 24-hour delay between successive battery tests.
Application Guide - The SEL-2506 Remote I/O Module offers an innovative solution for local and remote substation monitoring and annunciation.
Application Guide - This application guide explains how to configure the SEL-734 for automatic control based on system voltage and time of day.
Application Guide - This application guide contains an overview of the SEL-7000 Integrated Substation System for control, automation, monitoring, and protection.
Application Guide - This application guide describes a method for implementing the SEL-49 Relay line thermal protection on SEL-421 relays using SELogic® mathematical programming capabilities.
Application Guide - The purpose of this document is to provide detailed instructions for properly configuring the SEL-351R for automatic dial-out.
Application Guide - In a main and transfer bus arrangement, the bypass breaker can be used to take a line breaker out of service and maintain system integrity. However, the performance of the protective system is degraded if the communications circuit is not rerouted to the bypass breaker protection.
Application Guide - Microprocessor relays perform best when powered from a reliable dc voltage source.
Application Guide - This application guide shows how the SEL-551 Relay may be set to avoid tripping due to this cold load inrush, but still protect the circuit.
Application Guide - The SEL-587 Relay protects delta-wye connected transformers with current transformers inside the transformer delta connection.
Application Guide - This application guide shows the settings and connections required to establish Mirrored Bits communications when using the Microwave Data Systems Inc. model MDS TransNET 900™ spread-spectrum data transceiver operating with firmware specifically developed for this application.
Application Guide - This application guide focuses on advanced programmable logic as set in SEL-421-1 protection free-form and automation SELogic control equations, but also discusses Global, Breaker Monitor, Relay Configuration, Outputs, Front Panel, and Report setting areas.
Application Guide - This application guide describes the specific message content for the SEL-321-1/SEL-321-2 Relays.
Application Guide - This application guide describes commands that are not described in the Communications section of SEL Relay instruction manuals.
Application Guide - This application guide addresses a special use of the SEL-DTA2 Display/Transducer Adapter and the SEL-2020 Communications Processor.
Application Guide - The acSELerator software provides rules-based settings-creation assistance and enables you to develop settings off-line.
Application Guide - This application guide details two options for retrieving synchrophasor (synchronized phasor measurement) data from the SEL-421-0.
Application Guide - The SEL-3010 Event Messenger is an automatic alarm delivery system that places telephone calls directly to on-call operations and maintenance personnel. The SEL-3010 uses a text-to-speech conversion system that makes it superior to standard auto-dialers.
Application Guide - This application guide deals with incorporating mixed ratio current transformers in the protection scheme and obtaining a satisfactory operation of the relay with high security against external faults.
Application Guide - This application guide shows how the SEL-351S Relay may be set to avoid a cold load inrush, while still protecting the circuit.
Application Guide - This application guide explains the voltage supervision settings and describes how to add additional voltage supervision logic, specifically, line overvoltage and three-phase live line/bus voltage supervision, to the built-in scheme logic.
Application Guide - This application guide describes how to add ground overcurrent to the default breaker failure schemes for fault current protection in the SEL-352-1, -2.
Application Guide - This application guide describes how to use two SEL-3094 Interface Converters to provide a clock source for bench testing SEL-311L relays or other devices with a synchronous EIA-422 interface.
Application Guide - This application guide covers the steps required to apply the SEL-351 protective relay per the IEEE P1547 standard.
Application Guide - This application guide describes one method of connecting and setting an SEL-587 Relay to provide differential protection for a zig-zag grounding transformer.
Application Guide - This application guide describes the programming required to implement a Directional Comparison Unblocking (DCUB) scheme in the SEL-321, SEL-311C, SEL-311L, and SEL-421 Relays using Mirrored Bits communications, as well as the external connections for the SEL-321 Relay.
Application Guide - This application guide is designed to provide a guideline for implementing an SEL-2030 Communications Processor as an RTU replacement.
Application Guide - This application guide describes how to establish communication with SEL relays using a Personal Digital Assistant (PDA), and explains options for storing text data, such as an event report.
Application Guide - This application guide documents the settings necessary for programming an SEL-2030 Communications Processor for automated data collection and control of the ABB DPU2000R Relay.
Application Guide - This guide discusses specifics of relay operation that will enable you to construct a communications driver to use the SEL protocol.
Application Guide - Some regional coordination councils and individual utilities recommend or require that primary and backup protective relays, used at the bulk transmission level, be of differing construction and operating principles.
Application Guide - The SEL-2030 Communications Processor can be programmed to automatically collect data from many Intelligent Electronic Devices (IEDs).
Application Guide - Since the SEL-421 Relay has front-panel operator control pushbuttons similar to the SEL-351S Relay and SEL-351R Recloser Control, it may be desirable to program one of the pushbuttons to lock the front panel. This will prevent accidental operation of other pushbuttons.
Application Guide - Ungrounded systems, also referred to as isolated neutral systems, have no intentional ground.
Application Guide - The industry trend to increase the level of power system automation and remote accessibility, coupled with a dramatic increase in the number and sophistication of TCP/IP and telephone-based cyber attacks, is exposing the electric power industry to a growing risk of electronic intrusion.
Application Guide - All Schweitzer Engineering Laboratories, Inc. (SEL) microprocessor-based products with an EIA-232 serial communications port support American Standard Code for Information Interchange (ASCII) communications.
Application Guide -This application guide discusses applying SEL-321-1 Relays with integral Mirrored Bits communications to three-terminal lines with either of two pilot communication scheme logics: directional comparison blocking (DCB) or permissive overreaching transfer trip (POTT).
Application Guide - This application guide explains how to apply Mirrored Bits communications to a permissive overreaching transfer trip (POTT) scheme.
Application Guide - The dramatic increase in the use of the Internet, also known as the World Wide Web, has opened a Pandora’s box of network theft, extortion, sabotage and espionage by computer hackers, social and political hacktivists, organized crime, and foreign information warfare agents.
Application Guide -The SEL-351 includes a synchro-check function that you can use to prevent closing a breaker if the systems on both sides of the open breaker are excessively out of synchronism or phase angle.
Application Guide - This application guide details how to make a local breaker failure scheme transfer trip the remote line end terminal using the line current differential communications or Mirrored Bits communications.
NOTE: This application guide applies to an obsolete device.
Application Guide - A differential protection scheme can be created by paralleling the CTs of all the lines emanating from a station and connecting a relay across the CT connection point.
Application Guide - The extension of computer literacy worldwide coupled with the use of automatic dialing devices and the advent of the Internet, increases the risk that computer hackers will attempt “electronic intrusions” into protective relays, controllers, and SCADA systems that control and protect the generation, transmission, and distribution of electric power.
Application Guide - This application guide covers a relatively simple SELogic® control equations solution for the problem of dissimilar voltage magnitudes on the polarizing and synchronizing inputs of the SEL-311 Relay family of products synchronism check element.
Application Guide - Our increasing reliance on automated control systems, coupled with the rise in computer intrusions and international terrorism, has magnified the risk of unauthorized hostile access to electric utility control and protective systems.
Application Guide - This application guide covers a relatively simple SELogic® control equation solution for the problem of dissimilar voltage magnitudes on the polarizing and synchronizing inputs of the SEL-351 Relay family of products synchronism check element.
Application Guide - Connectorized SEL relays offer the advantage of robust connections while minimizing installation, testing, and replacement time.
Application Guide - Microprocessor relays contain an abundance of information that is very useful for the protection engineer and for maintenance, system planners, and operations personnel.
Application Guide - This application guide describes the Line Transfer Trip (LTT) scheme, which is based upon the Direct Transfer Trip (DTT) scheme.
Application Guide - The SEL-701 Motor Relay protection package uses a patented integrating thermal model.
Application Guide - Every time your breaker operates, auxiliary contacts (52a and 52b) interrupt dc trip or close current by brute force.
Application Guide - Shunt capacitor banks connected to a power system are economical generators of reactive power.
Application Guide - This application guide shows an application for elementary voltage control on a single transformer.
Application Guide - For a stable power system operating at nominal frequency, the total mechanical power input from the generators equals the sum of all connected loads plus all system power losses.
Application Guide - The SEL-351S Relay supports DNP V3.0 Level 2 Slave Protocol that provides access to metering data, Relay Word Bits, targets, sequential events recorder (SER), breaker monitor, relay summary event reports, and settings groups.
Application Guide -This application guide shows how to split the trip outputs while still taking full advantage of the built-in trip logic in the relays. This example uses the SEL-351 relay, but the SEL-551 relay is similar.