GFD — Ground Fault Detector
Sales and Ordering Information
Ground Fault Detectors (GFD) are typically installed on three-phase underground systems. GFDs sense a fault by detecting an imbalance in the vector sum of the currents in the three-phase cable. The GFD indicates a fault by showing a large reflective red target (8 square centimeters). GFDs coordinate with current limiting fuses, are available with trip response time settings, auxiliary contacts for SCADA monitoring, and in a variety of reset classes.
GFDs are suited for application in harsh environments.
- Detects ground faults by sensing the vector sum of the current flowing through a three-conductor cable.
- Choice of three reset options (secondary voltage, load current, or time) to meet various application needs.
- Install the split-core sensor on three-phase cables without opening the primary.
- Large reflective red target is easy to see both at night and during the day.
- Submersible, vinyl-coated sensing core.
- Stainless-steel hardware and UV-stabilized materials ensure long product life.
- Thousands of SEL GFDs in service today help customers around the world quickly locate ground faults.
|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)||2, 4, or 8 hours|
|Nominal Trip Ratings||20, 40, 50, or 100 A|
|Maximum Fault Current ||25 kA for 10 cycles|
|Trip Response Time||1 ms|
|Outer Diameter Clamping Range||4" (6" optional)|
|Housing Materials||UV-stabilized polycarbonate resin|
|Submersibility ||Up to 15 feet|
|Temperature Range ||—40° to +85°C|