Portable Underground Cable Fault Locator with Acoustic Magnetic Sync

Introduction
The cable fault location instrument uses the acoustic and magnetic synchronization method to determine the power cable fault point. The electronic flashover is generated by the impact discharge generator, picked up and amplified by the corresponding probe, and the precise location of the fault point is determined by auditory and visual judgment. It is a device that completes the precise positioning of the cable fault point within the rough measurement range and collects the acoustic and magnetic time difference. It integrates positioning technology, path-assisted testing and other technologies, providing multiple test modes and rich and diverse prompt information to efficiently and accurately complete cable fault location.

1.Technical indicators

Operation panel introduction

1 Adjustment: Press the adjustment button to enter the adjustment interface, and rotate the adjustment button to set the adjustment parameters;

2 Power supply: Turn on and off the power supply of the system. When turning on the system, you need to press and hold the power button for 3 to 4 seconds until you hear a long "beep" sound, then you can lift the button; when turning off, you need to press and hold the power button for 3 to 4 seconds;

3 Display: 5-inch touch display.

1 Sensor: Probe sensor connection port;

2 Charging: charger connection port;

3 Dedicated headphone jack.

Packing list

Picture the scene

Accurately and quickly detect the main insulation failure of power cables with voltage levels of 35KV and below; calibrate the cable length; roughly test cable fault distance

*Pre-locating cable faults with the reflectometer XHGG502 based on the low-voltage pulse reflection method (TDR),

high voltage flashover method (ie. ICE, DECAY), arc reflection pulse reflection method (ARC single shot and ARC multi-shot)  Cable fault pre-location: with the reflectometer XHGG502 based on the low-voltage impulse reflection method(TDR), and high-voltage decay(flashover) method (DECAY), arc reflection method(single-shot/ multi-shot).

There are three test mode of XHGG502, low voltage pulse, high voltage flashover, ARC multi-shot. 

The below picture shows cable fault distance measured by using ARC multi-shot test mode of XHGG502.

The below picture shows cable fault distance measured by using high voltage flashover test mode of XHGG502

The below picture shows cable length or cable open circuit fault distance measured by using low voltage pulse test mode of XHGG502. When using the low voltage pulse method, it is not necessary to connect the high voltage pulse generator. Other test methods must be used in conjunction with a high-voltage pulse generator.

                                New version                                                                                      New version

The XHHV535-2L high-voltage pulse generator is mainly used for shock discharge during cable fault test.It can also be used for DC withstand voltage test of other electrical equipment. This device integrates DC high voltage source, energy storage capacitor, discharge ball gap, etc. This device completely replaces the traditional hundreds of kilograms of test transformers, operation boxes and pulse energy storage capacitors (generally a set of 5kVA transformers are more than 60 kilograms, control The box is more than 30 kg, and the pulse energy storage capacitor is more than 20 kg). The power supply adopts high-precision, high-stability special high-voltage electronic components and high-frequency high-voltage technology, which makes the whole machine simple in structure and ultra-light in weight. In order to retain people's habit of using transformers and operation boxes to generate DC high voltage, this pulse generator adopts humanized design and operation mode, which is safe and reliable. Really achieve the effect of not being damaged by impact, and the short circuit of high voltage to ground can also work normally. It is currently the lightest and most user-friendly portable DC shock high-voltage equipment. It is an ideal product for power cable fault detection.

Product features

★ With over-current, over-voltage, overheating automatic protection function;

★ With DC withstand voltage, impact discharge function;

★ The high-voltage pulse output is uniform and controllable;

★ Super short-circuit protection function, which can make the high-voltage output directly short-circuit to the ground;

★ It has dual 2.5-level pointer meters for current and voltage display, which is intuitive and clear, and it is clear at a glance whether the fault point is fully discharged, and the discharge process is reflected in real time;

★ High-voltage side voltage meas

Technical data

Panel introduction

1. Safety ground: The ground of the instrument shell must be reliably connected to the ground in order to prevent the instrument shell from being electrified or electric shock to personnel. 

2. High-voltage ground: Also known as high-voltage tail, it must be grounded reliably to prevent high-voltage leakage and discharge. Poor contact may cause failure to boost the voltage, high voltage breakdown of the internal components of the instrument, and safety accidents caused by leakage or discharge inside the instrument.

3. Sampling ground: The negative terminal of the pulse energy storage capacitor has a high voltage and must be grounded reliably. It is used for sampling when the waveform is sampled under the high-voltage flashover state of the cable fault tester. (Without high-voltage flashover sampling, reliable grounding is still required).

4. Discharge button: Press this button to make contact with the ball gap, and discharge manually. (The duration of each key press cannot exceed 1s).

5. High voltage start button: When the start button light is on, it means that the voltage output is in the zero position. When the light is on, the start button is valid. If the start button light is not on after turning on the power switch, turn the voltage adjustment knob counterclockwise until the light is on. When the button light is on, press this button to start the device and generate high voltage output.

6. High-voltage stop button: When the test is completed or an abnormality occurs, press this button to cut off the high-voltage output, the high-voltage light goes out, and the internal discharge ball stops working. When the stop key is on, it means there is high voltage output, and when it is off, it means there is no high voltage output.

7. Over-current protection switch: When pressed, it means that the over-current protection function has started; when it is popped up, it means that the instrument has triggered the over-current protection.

8. Voltage adjustment: After turning on the device, you must first turn the knob conterclockwise to the end, press the start button, and then adjust clockwise to increase the output high voltage from small to large, and adjust counterclockwise to reduce the output high voltage from large to small.

9. Power switch: "I gear" turns on the AC 220V power supply switch, and "0 gear" turns off the system power.

10.The fuse holder: the place where the fuse of the AC 220V power supply system is installed.

11. Power socket: the working power supply of the instrument, AC 220V connection port.

12. Time setting: Set the discharge time interval.

13. Ammeter: indication of the current on the high voltage side.

14. Voltmeter: high voltage output voltage indicating kV meter.

15. High-voltage output (EMP): When impacting discharge, connect the high-voltage output line.

16. High voltage output (DC): When DC withstand voltage, connect the high voltage output line.

Packing list

Application- underground cable fault location

​​​We are a professional manufacturer of cable fault detection equipment, we can customize the special technical solution for you.

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