SEL-GFD
Underground Ground Fault Detector
The SEL-GFD provides the following features and benefits:
- Ground fault detection by sensing the vector sum of the current flowing through a three-conductor cable.
- Three reset options (secondary voltage, load current, or time) to meet various application needs.
- Split-core sensor that installs on three-phase cables without opening the primary.
- Large reflective red target display that is easy to see both at night and during the day.
- Submersible, vinyl-coated sensing core.
- Stainless steel hardware and UV-stabilized materials to ensure a long product life.
Thousands of SEL-GFDs in service today help customers around the world quickly locate ground faults.
Industrial Sites—Apply the SEL-GFD over a three-phase cable bundle at ground potential in live-front switchgear to identify faults on circuits feeding mining equipment, medical facilities, and other industrial equipment. The vinyl-coated sensor core and potted circuit components provide an excellent seal against moisture and humidity in challenging industrial environments. The split-core sensor installs on three-phase cables without the need to open the primary or interrupt vital industrial operations.
Underground Cable at Substations—Apply the SEL-GFD to an underground cable distribution circuit feeder before the feeder leaves the substation to identify ground faults in the underground section of the circuit.
Low Load Current—Choose a secondary reset option to power and reset the SEL-GFD from secondary voltage (120–240 VacL-N) at a transformer. The SEL-GFD reset and powering options provide a wide range of compatibility across various applications, especially where feeders are lightly loaded or there is no load present.
Details
Some configurations, such as those with an LED or timed-reset feature, may contain a battery. For configurations with a battery, please see the lithium metal battery warning.
The Firmware IDs for older versions of the firmware can typically be found in Appendix A of the instruction manual.