<style>html{display:none}</style> <meta http-equiv="refresh" content="0.0;url=/error/nojs.html"> IEDs e Relés de Proteção SEL - Schweitzer Engineering Laboratories

FOR THE FIRST TIME EVER

TRAVELING-WAVE PRINCIPLES AND
MICROPROCESSOR-BASED PROTECTION

COME TOGETHER

INTRODUCING THE
FIRST TRAVELING-WAVE LINE
PROTECTIVE RELAY

SEL-T400L TIME-DOMAIN LINE PROTECTION

NOW AVAILABLE

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World’s Fastest Transmission
Line Relay

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World’s Fastest Transmission Line Relay

With traveling waves and incremental quantities, the SEL-T400L Time-Domain Line Protection breaks the speed barrier of phasor-based relays. The SEL-T400L trips four to ten times faster than today’s best relays while providing extended self-monitoring and security for out-of-zone events.

4 ms

TD21: Incremental Quantity Distance

2 ms

TD32: Incremental Quantity Directional

1 ms

TW87: Traveling-Wave Differential

0.1 ms

TW32: Traveling-Wave Directional

World’s Most Precise
Event Recorder

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World’s Most Precise Event Recorder

The SEL-T400L Time-Domain Line Protection is the only protective relay that samples and records voltages and currents at an unprecedented million samples per second, opening up a whole new world for you to see and act on. You’ll now be able to see breaker restrikes, self-extinguishing faults, switching events, and other high-frequency signal signatures. The SEL-T400L streams time-stamped Fast Time-Domain Values (FTDV) in real time, allowing you to see wide-area events with a stunning 1 µs resolution.

You’ve never seen your power system like this before. And it’s only the beginning.

1 MHz, 18-Bit

Sampling

50 Events

Storage

1.2 Seconds

Duration Per Event

3 Events

Back-to-Back Recording