APP 710: SEL-710 Motor Protection Relay

In this two-day course, students will explore how to use the SEL-710 Motor Protection Relay to protect induction motors in an industrial setting. Students will complete in-depth, hands-on application and settings examples to learn how they can implement complete motor protection and control.

Students will gain a comprehensive understanding of motor protection application philosophies, including SEL’s patented Thermal Model, which is integrated into the SEL-710 Motor Protection Relay. APP 710 includes real-world motor examples and reduced voltage and capacitor start applications. In groups of two, students gain hands-on experience in communicating, setting, commissioning, retrieving reports, and performing motor control functions by working directly with the SEL-710.

Audience

This course is intended for utility and industrial protection engineers and power system consultants.

Agenda

Day 1

• Motor Protection Fundamentals
• SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
• Introduction to SELogic Control Equations
• SEL-710 acSELerator QuickSet and Motor Data Introduction
• Relay Front-Panel Operations
• SEL-710 Motor Protection Overview
• SEL-710 Thermal Model Elements and Settings

Day 2

• Overcurrent Elements
• Load-Jam and Load-Loss Elements and Settings
• Current Unbalance (46), Phase Reversal, Speed Switch, and Breaker Failure Elements
• RTD-Based Protection and Settings
• Other Protection Elements in the SEL-710
• Input/Output Configuration
• Monitoring and Reporting
• Event Reports
• Arc-Flash Protection (optional)
• Loss of Field, Loss of Synchronization, Excitation System Monitoring, and Excitation Application Control (optional)
• Broken Rotor Bar Protection (recording provided)

Course Objectives

At the conclusion of this course, students can:

• Enter nameplate data with QuickSet.
• Communicate with the relay front-panel and serial port interfaces.
• Calculate and apply settings for the thermal model and thermal overload protection element.
• Determine motor relay settings to meet varied motor protection requirements and to maximize motor performance and safety.
• Retrieve and analyze motor trend reports, start reports, and event reports.
• Apply methods learned in class to troubleshoot and commission motor protection.

Student Background and Knowledge

Before you attend this class, we recommend that you:

• Complete CBT 101: Introduction to SEL Relays OR have basic familiarity with protective relaying, SELogic control equations, front-panel controls, and the SEL-4000 Relay Test System.
• Have the ability to set up relay communications using QuickSet.