Relay Protection Device Brand Model Specifications

Relay protection devices are available from leading manufacturers like ABB, Siemens, and Schneider Electric, offering multifunctional, programmable, and modular solutions for medium- and high-voltage systems.

Major Brands and Models

1. ABB

• Type: Numerical/microprocessor-based relays
• Features: Programmable, multifunctional, suitable for digital substations, overcurrent, distance, and differential protection
• Examples: REX615, REX640
• Specifications: Microprocessor-based, configurable characteristics, supports multiple protection functions, compact design for medium-voltage applications 2. Siemens (SIPROTEC Series)
• SIPROTEC 5: Modular design with DIGSI 5 engineering tool for configuration
• SIPROTEC 7SX82: Universal protection relay for medium-voltage feeders, lines, and motors
• SIPROTEC 7SA87: Modular distance protection for high-voltage lines, 1-pole or 3-pole tripping, minimum 9 ms tripping time
• SIPROTEC 7SL82 / 7SL86 / 7SL87: Combined line differential and distance protection for lines and cables, supporting up to 6 ends
• SIPROTEC 7SJ82 / 7SJ85 / 7SJ86: Overcurrent protection for feeders, lines, and capacitor banks, flexible automation and monitoring
• SIPROTEC 7UT82: Differential protection for two-winding transformers, compact and reliable 3. Schneider Electric
• MiCOM P11x: Compact medium-voltage relays for phase and ground fault protection, self-powered or dual-powered
• PowerLogic P3 / P5 / P7: Protection relays for medium-voltage applications, arc flash protection, LPCTs, LPVTs, Ethernet communication including IEC 61850
• Sepam Series 80: Advanced protection for motors, generators, busbars, capacitors, and substations
• ECOFIT 50/51: Single-phase or ground time overcurrent relays, plug-and-play replacements for legacy GE and Basler relays

Key Specifications and Features

• Protection Functions: Overcurrent, differential, distance, arc flash, voltage, and ground fault protection
• Response Time: High-speed tripping, some devices as fast as 9 ms
• Communication: Ethernet, IEC 61850, remote monitoring, and integration with SCADA systems
• Modularity: Many relays allow adding protection functions as needed, supporting flexible configurations
• Power Supply: Self-powered, dual-powered, or auxiliary voltage options
• Applications: Medium- and high-voltage feeders, transformers, motors, capacitor banks, and digital substations
• Engineering Tools: Software like DIGSI 5 (Siemens) or Schneider's configuration tools for device setup, monitoring, and diagnostics

Summary

Relay protection devices from ABB, Siemens, and Schneider Electric provide programmable, multifunctional, and modular solutions for modern power systems. Selection depends on the application type, voltage level, required protection functions, and integration needs. Devices like SIPROTEC 7SX82, MiCOM P11x, and PowerLogic P3/P7 are widely used for medium-voltage feeders, lines, and transformers, offering high-speed tripping, arc flash protection, and advanced monitoring capabilities.