Manuals+

SEL-T401L: Advanced Line Protection Relay

Introduction to the SEL-T401L

The SEL-T401L is a high-performance, user-friendly line protection relay designed for modern power systems. It integrates ultra-high-speed time-domain protection elements and schemes with a comprehensive suite of phasor-based protection and supervisory functions. This relay offers dependable protection for transmission lines, featuring a traveling-wave fault locator and an ultra-high-resolution transient recorder.

Built on the proven technology of its predecessor, the SEL-T400L, the SEL-T401L delivers exceptional operating times and simplifies line protection applications with straightforward philosophies and reduced setting counts. It is suitable for a wide range of applications, including series-compensated lines, overhead and cable lines, and hybrid lines.

Key Features and Benefits

  • Time-Domain Protection: Utilizes patented SEL technology for ultra-high-speed fault detection and location using traveling waves and incremental quantities.
  • Traveling-Wave Fault Locator: Accurately locates faults to the nearest tower using advanced algorithms.
  • Ultra-High-Resolution Transient Recording: Captures detailed waveform data for in-depth analysis of power system events.
  • Comprehensive Protection Functions: Includes distance elements, overcurrent elements, directional elements, and supervisory logic for robust protection.
  • Flexible Application: Protects two-terminal and multiterminal lines, supports single- or three-pole tripping, and is adaptable to various line configurations.
  • Dependable Performance: Designed for speed and security, with features like redundant measurement and advanced logic to ensure reliable operation.

Applications

The SEL-T401L is ideal for protecting transmission lines in diverse power system environments, including those with nonstandard generators, low-inertia systems, and series compensation. Its advanced features make it a valuable tool for enhancing grid reliability and operational efficiency.

For more detailed information, please refer to the official Schweitzer Engineering Laboratories website.

Models: SEL-T401L Ultra High Speed Line Relay, SEL-T401L, Ultra High Speed Line Relay, High Speed Line Relay, Speed Line Relay, Line Relay

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T401L DS 20250424

References

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