This is a three-day course.
Course Base Fees: $1,500 USD
APP 421 provides comprehensive application instruction for the SEL-421 Protection, Automation, and Control System, an extremely flexible, high-speed relay for dual-breaker control applications used in multiple functions. Students (in groups of two) will gain hands-on experience in communicating, setting, metering, monitoring, reading event reports, retrieving event reports, and performing control functions working directly with the SEL-421 Relay.
This course is designed for utility and industrial protection engineers and power system consultants.
- Introduction to the SEL-421
- Introduction to the Example Protection Scheme
- Introduction to SEL-421 Relay Communications and ACSELERATOR QuickSet SEL-5030 Software
- SELOGIC Control Equations
- Global Settings
- Breaker Monitor
- Line Configuration, Relay Configuration, and Distance Element Settings
- Switch-Onto-Fault, Out-of-Step, and Load-Encroachment Settings
- Time-Overcurrent Elements
- Directional Elements
- Pole-Open Detection
- Communications-Assisted Tripping Schemes
- Breaker Failure
- Synchronism-Check Element
- Trip Logic
- Output Settings
- Front-Panel Settings
- Data Capture and Event Reports
- Communication Protocols
- Time Synchronization and Synchrophasors
At the conclusion of this course, students can:
- Apply the SEL-421 Relay protection, monitoring, metering, and control features, including current and voltage selection logic.
- Use the SELOGIC control equations with math and comparison variables in the independent protection and automation areas.
- Apply relay settings, program SELogic control equations, and analyze fault records and relay element responses using QuickSet.
- Analyze Sequential Events Recorder (SER) reports and use COMTRADE files.
- Implement relay-to-relay logic via MIRRORED BITS communications.
- Map and retrieve critical analog and digital information in DNP3 Level 2.
- Select the appropriate Enable Source Selection (ESS) setting for required applications.
- Communicate with the relay via the front panel and HMI interface, including pushbuttons and associated LEDs, display points, targeting LEDs, and front-panel metering.
Student Background and Knowledge
Before you attend this class, we recommend that you:
- Complete CBT 101: Introduction to SEL Relays OR have familiarity with protective relaying, SELOGIC control equations, QuickSet, front-panel controls, and the SEL-4000 Relay Test System.
- Have the ability to set up a communications session.