SELSEL-T401L Ultra-High-Speed Line Relay

for condition-based line maintenance. This feature helps to

prevent faults and to discover weak spots along the line.

High-Fidelity Transient Recording

The SEL-T401L measures and records line currents

and voltages with high-fidelity (1 MHz, 18-bit) sampling,

offering an enhanced understanding of the events on your

power system. This allows you to analyze high-frequency

transients, such as traveling waves from faults, switching

events, breaker restrikes, and self-extinguishing faults.