High-Impedance Fault Detection
Take the next step in your wildfire mitigation plan.
Adding high-impedance fault (HIF) detection capabilities to your distribution system provides a time- and cost-effective solution for limiting wildfire risk and improving public safety. In a technical paper authored by engineers from PPL Electric and SEL, “The implementation at PPL improved the safety of employees and the public by decreasing the possibility of potentially dangerous conditions resulting from a downed conductor.”
Detect Downed Conductors
To reduce the risk of fire, SEL devices can detect the HIF from a downed line and quickly stop the flow of power using the following protection elements.
Arc Sense technology (AST) detects high-impedance faults that might not be detected by conventional overcurrent elements, especially in the challenging case of 4-wire systems. Dedicated event reports provide information on HIF activity for event analysis.
Sensitive earth fault (SEF) detection and sensitive directional elements provide high detection sensitivity for HIFs when there is little standing imbalance, such as on 3-wire systems.
Detect Downed Conductors
To reduce the risk of fire, SEL devices can detect the HIF from a downed line and quickly stop the flow of power using the following protection elements.
Arc Sense technology (AST) detects high-impedance faults that might not be detected by conventional overcurrent elements, especially in the challenging case of 4-wire systems. Dedicated event reports provide information on HIF activity for event analysis.
Sensitive earth fault (SEF) detection and sensitive directional elements provide high detection sensitivity for HIFs when there is little standing imbalance, such as on 3-wire systems.
2019_Toua-21.jpeg
HIF detection is available on these products:
| SEL-451 | SEL-351 | SEL-751 | SEL-651R-2/A | |
| 4-wire multigrounded | x | x | x | |
| 3-wire solidly grounded | x | x | x | x |
| 3-wire ungrounded | x | x | ||
| 3-wire resonant-grounded | x | x |
Enhance your wildfire mitigation capabilities by requesting a follow-up from the SEL sales representative in your region via the form below.