I. Overview
XJD-100 overhead current line fault locator for small current, suitable for overhead current system overhead lines, in the event of a single-phase ground fault line outage, the device can be used to accurately ground points
Positioning. XJD-100 is a set of portable equipment, a set of equipment can be used for fault location of multiple lines. The whole set of equipment consists of transmitter (XJD-100T), sensor (XJD-100S), receiver
(XJD-100R10) and accessories.
After the fault line is out of service, an ultra-low-frequency high-voltage signal is applied from the transmitter to the line to reproduce the fault. The sensor is hung on the line along the line with an insulating rod.
The signal is detected and the data is transmitted wirelessly to the receiver on the ground. The receiver displays the measurement result. The current continues to exist before the point of failure, and the current disappears after the point of failure. Advanced
Roughly segment and fine-tune the points to quickly determine the location of the fault.
Second, functional characteristics
1. It is applicable to the distribution network of small-current grounded systems, detecting single-phase metallic grounding of overhead lines, arc grounding, earthing by transition resistance, and other faults.
2. Positioning after the line is out of service, especially suitable for cable branches, not with faulty lines.
3. Apply high-voltage signal to reproduce the fault, constant current signal is stable, easy to detect.
4. The ultra-low frequency signal avoids the influence of the distributed capacitance of the system and can locate the high resistance fault.
5. Transmitter safety features: High-voltage startup lockout function, output allows direct short circuit.
6. The sensor uses a high-sensitivity sensor, opening design, no closure, easy to mount on the line.
7. Sensor and receiver wireless communication transmission, safe and reliable.
8. The transmitter can be powered using commercial power, a generator or a car inverter, and the sensors and receivers can be powered by dry batteries.
9. The transmitter is small in size and light in weight; the sensor is designed to minimize the volume weight and is convenient for mounting along the line; the receiver is a handheld design.
10. The receiver uses a large-screen liquid crystal display to display the sensor status, current waveform, and current value.
Third, technical indicators
1. Positioning accuracy: 0.2 meters.
2. Transmitter output characteristics:
(1) Open circuit voltage 8kV (equivalent to phase voltage peak of 10kV line, which can be set according to user requirements);
(2) Short-circuit current 100mA;
(3) Output frequency 1Hz.
3. Wireless communication distance between sensor and receiver: no less than 30m.
4. Transmitter power supply: AC 220V power supply, can be connected to generator/car inverter (output power ≥1500W).
Transmitter power: The highest power 900W.
6. Sensor power supply: 3 alkaline dry batteries on the 7th.
7. Receiver power supply: 5 AA alkaline batteries.
8. Volume: transmitter 350×210×300mm; sensor 180×100×35mm; receiver 205×100×35mm
9. Quality: transmitter 12kg; sensor 0.45kg; receiver 0.45 kg
10. Conditions of use: Temperature: -10°C-40°C, humidity 5-90%RH, elevation <4500m.