The SEL-GFD provides the following features and benefits:
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.
|Power Source||Secondary voltage (120 to 240 VacL-N at 50 to 60 Hz), load current (≥3 A), or lithium battery for timed-reset products|
|Reset Time (Timed Reset Models Only)||4, 8, or 24 hours|
|Nominal Trip Ratings||20, 40, 50, or 100 A|
|Trip Tolerance||±10 percent|
|Maximum Fault Current||25 kA|
|Trip Response Time||1 ms|
|Outer Diameter Clamping Range||4" (6" optional)|
|Housing Materials||UV-stabilized polycarbonate resin)|
|Submersibility||Up to 15 feet|
The Firmware IDs for older versions of the firmware can typically be found in Appendix A of the instruction manual.