List of Brands for Second-Line Relay Protection
Key brands for second-line (backup) protective relays include ABB, Siemens, Schneider Electric, Eaton, GE Grid Solutions, SEL, and OMICRON.
Global Leaders
- ABB: Offers a wide range of digital and electromechanical relays for transmission, distribution, and industrial applications, with advanced IEC 61850 communication and AI-enabled protection features .
- Siemens: Provides comprehensive relay solutions including overcurrent, differential, and distance protection relays suitable for backup protection .
- Schneider Electric: Known for industrial and utility-grade relays with integrated monitoring and predictive diagnostics .
Mid-Tier and Industrial Players
- Eaton: Supplies protective relays for industrial and transmission systems, including overcurrent and feeder protection relays .
- GE Grid Solutions: Offers digital relays for backup protection, including multifunctional and distance relays for transmission and distribution networks .
Specialized and Innovation-Driven Brands
- SEL (Schweitzer Engineering Laboratories): Provides high-speed, subcycle line differential, feeder, busbar, generator, and transformer protection relays, optimized for backup and primary protection .
- OMICRON: Focuses on advanced testing and protection solutions, including digital relays for backup applications .
Additional Notable Manufacturers
- Fanox: Offers feeder protection and recloser control relays suitable for backup protection .
- Multilin (GE): Provides the 8 Series protective relay platform for generator, transformer, and feeder backup protection .
- KINRED: Supplies voltage protection relays for overvoltage and undervoltage backup applications . These brands cover a broad spectrum of second-line relay protection needs, from conventional overcurrent and voltage relays to advanced digital, directional, and differential relays. When selecting a brand, consider system compatibility, communication protocols, speed of operation, and integration with existing protection schemes.
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