html{display:none} Introducing the SEL-TWFL | Schweitzer Engineering Laboratories

Introducing the SEL-TWFL

Coming Soon


Dual Traveling-Wave Fault Locator and 12-Channel MHz Recorder

SEL-TWFL Dual Line Fault Locator and MHz Recorder

The SEL-TWFL is a traveling-wave fault-locating device that provides accurate and dependable fault location for up to two power lines using traveling-wave- and impedance-based fault-locating methods. The traveling-wave fault-locating technology used in the SEL-TWFL has a field-proven accuracy of one tower span. The SEL-TWFL includes line-monitoring logic to monitor lines for incipient faults.

The device interfaces with conventional voltage and current transformers and can be used to monitor two line terminals at a substation.

It is suitable for multi-terminal applications; you can apply the SEL-TWFL on overhead, cable, and hybrid lines. The SEL-TWFL includes a MHz recorder to capture as many as six currents and six voltages for up to 1.2 seconds at 1 MHz sampling rate with 18 bits of resolution. This capability allows for detailed analysis of power system transients, such as breaker reignition and transient recovery voltage.

Read more about applying traveling-wave fault locating to your system:

Five Surprises Discovered With Megahertz Sampling and Traveling-Wave Data Analysis

Technical Papers:
Locating Faults by the Traveling Waves They Launch
Line Length and Fault Distance Considerations in Traveling-Wave Protection and Fault-Locating Applications
Preventing Line Faults With Continuous Monitoring Based on Current Traveling Waves
Improving Line Crew Dispatch Accuracy When Using Traveling-Wave Fault Locators
Testing Traveling-Wave Line Protection and Fault Locators
Traveling-Wave Fault Locating for Multiterminal and Hybrid Transmission Lines