Description
Overview
GAOTek low-current grounding fault locator for overhead line is suitable for low-current grounding system overhead line. When the line is out of service due to single-phase grounding fault, the device can be used for accurate positioning at the docking site.
It is a portable device that can locate faults on multiple lines. After the fault line is out of service, the transmitter applies ultra-low frequency high voltage signal to the line to make the fault reappear. The sensor is hung on the line with an insulating rod along the line to detect the signal, and transmits data to the receiver on the ground through wireless mode, and the receiver displays the measurement results. Before the fault point, the current continues to exist, after the fault point, the current disappears. Rough segmentation can be performed first, and then precise location, so as to quickly determine the location of the fault.
Features
- Integrated design with small size and light
- Different sub-models with difference specification
- Imported safety case, professional and portable
- Built in energy-storage capacitor without HV leak and safe operation
- Built-in high power quick charging and short discharge period
- Multiple safety protection supports Zero position start and release HV power energy after power off
- Multiple working methods of single, period and DC
Technical Specifications
| Positioning accuracy | 7.8 in (0.2 meters) | ||
| Transmitter output characteristics | Output frequency | 1 Hz | |
| Open circuit voltage | fundamental wave effective value 0 to 2800 V, | ||
| (Pulsating DC, peak 8 kV, equivalent to the peak phase voltage of 10 kV line) | |||
| Short circuit current | fundamental wave effective value 0 to 35 mA (pulsating DC, peak value 100 mA) | ||
| Wireless communication distance | no less than 109.3 yard (100 m) | ||
| Transmitter power supply | AC 220 V mains, can be connected to generator | ||
| Output power | ≥ 1500 W | ||
| Transmitter power | maximum 900 W | ||
| Sensor power supply | 3 pcs NO.5 alkaline dry batteries | ||
| Receiver power supply | 5 pcs NO.5 alkaline dry batteries | ||
| Size | Transmitter | 16.4 in x 9.2 in x 12.5 in (417 mm × 234 mm × 318 mm) | |
| Sensor | 7.08 in x 3.9 in x 1.3 in (180 mm × 100 mm × 35 mm) | ||
| Receiver | 8.07 in x 3.9 in x 1.3 in (205 mm × 100 mm × 35 mm) | ||
| Weight | Transmitter | 37.03 lb (16.8 kg) | |
| Sensor | 0.99 lb (0.45 kg) | ||
| Receiver | 0.99 lb (0.45 kg) | ||
| Operating conditions | Temperature | 14 °F to 104 °F (-10 ℃ to 40 ℃) | |
| humidity | 5 to 90 % RH | ||
| altitude | < 2.7 miles (4500 m) | ||