This is a two-day course.
Course Base Fees: $1,000 USD
Students in the APP 487B course explore implementation of station-wide, low-impedance current differential protection and integrated circuit breaker failure detection using the SEL-487B Bus Differential and Breaker Failure Relay. Single- and three-relay applications for both basic and complex busbar arrangements are covered. Backup overcurrent protection, event recording, automation, and time-synchronization capabilities are discussed. Students will work directly with the SEL‑487B Relay, performing hands-on communications, settings, and testing.
Course topics include:
- Busbar differential protection.
- Bus coupler configurations and settings.
- Coupler security logic.
- Bus coupler faults and accelerated tripping.
- Advanced zone selection logic and CT requirements.
- Open-phase detection and breaker failure protection.
- Phase, negative-sequence, and zero-sequence voltage supervision.
- Disconnect and breaker status monitoring.
- Multiple event report analysis and high-resolution Sequential Events Recorder (SER) reports.
- Settings management and event analysis using acSELerator QuickSet SEL-5030 Software.
- Direct transfer trip with Mirrored Bits communications.
This course is designed for utility and industrial protection engineers and power system consultants.
- Relay Overview
- Front-Panel HMI and Hardware Overview
- Relay Communications
- SELogic Control Equations
- Single-Zone Application Example
- Alias Settings
- Global Settings
- Zone Configuration Settings
- Protection Settings
- Output Configuration and Settings
- Front-Panel Settings
- Event Report Retrieval and Analysis
- Dual-Zone Application Example
- Breaker Failure Protection
At the conclusion of this course, students can:
- Determine busbar classifications and interpret station diagrams.
- Establish a busbar protection philosophy.
- Describe differential bus protection schemes, principles, and performance standards.
- Determine input information needed for protection zone selection.
- Assign relay inputs using SELogic control equations and alias names.
- Develop settings for different busbar configurations.
- Program front-panel LEDs to indicate latch bit status.
- Access relay status and event history for multiple relays.
Student Background and Knowledge
Before you attend this class, we recommend that you:
- Complete CBT 101: Introduction to SEL Relays (highly recommended) OR have basic familiarity with protective relaying, SELogic control equations, QuickSet, front-panel controls, and relay testing.
- Have the ability to set up a communications session.