The trolley-type cable fault locating system highly integrates traditional and independent cable fault testers, integrated high-frequency and high-voltage power supplies, multiple pulse generators, path transmitters, insulation resistance testers, and other independent units. The system is used for rough testing of various fault distances, path finding, and precise fault location of power cables. The testing software automatically recognizes the card position and reads the fault distance, truly making the testing of cable faults light, simple, efficient, and safe. Provide convenience for rapid testing of power cable faults.
Features
The system adopts an integrated design, which is convenient and flexible to move.
It is suitable for testing various main insulation faults of 380V-220kV power cables.
Highly integrated fault test, high voltage power supply, insulation resistance test, cable path test and other functions.
The fault test unit adopts industrial control embedded computer platform and Linux operating system.
The high-frequency and high-voltage power supply unit adopts a photoelectric mouse control system, which embodies human-computer interaction, convenient operation, and simple and intuitive display.
The insulation resistance test unit is digital, and the liquid crystal display can display the working status and test results of the instrument.
The cable path test unit LCD display shows the transmitter, received signal frequency and signal strength.
The system is equipped with a 25m test line, which is convenient for cable fault testing in long distances, short distances and complex environments.
Functions
Fault test unit
Adopts 12.1in large screen, knob and mouse control, and bright LCD display, which is suitable for outdoor use under sunlight. The distance measuring part of the main unit is powered by lithium battery, which is convenient for on-site testing and has strong stability.
Using the latest integrated communication technology, the acquisition signal is stable, the host can automatically select six sampling frequencies from 6.25MHz to 200MHz, and self-adaptive pulse width, which can meet the test requirements of cables with different lengths, reduce prediction errors and improve test accuracy.
The software realizes fully automatic identification and search of low-voltage pulse and multiple pulse wave heads, automatic clamping of waveform fault inflection points, automatic reading and display of fault distance, waveform display in three areas on the same screen, random display of ten measured waveforms for selection on the same screen, and automatic and manual processing modes, enabling dual clamping operation of waveforms. The double cursor movement can be accurate to 0.15 meters, improving testing accuracy and reducing waveform errors.
Built in measured waveforms and physical wiring diagrams for on-site testing comparison and daily learning, and can automatically generate and print test reports, which can be retained as cable operation and maintenance records.
High frequency high voltage power supply unit
Integrated design, built-in capacitor.
Touch screen human-computer interaction, easy setting and operation, intuitive and convenient instrument status display.
It has the functions of voltage regulation, automatic voltage stabilization and automatic protection.
The output high voltage has the functions of single pulse and continuous pulse, and it cooperates with the fault tester and fixed point instrument to find the fault point respectively.
The output high voltage has a DC output, which can work with an external ball gap, and has multiple applications.
The software controls vacuum shock spark discharge, self-adaptive discharge and pulse cycle.
With emergency stop button, automatic discharge function, emergency stop or shutdown automatic step-down discharge, safe and reliable.
The continuous working time is not less than 6 hours, which meets the longest working time of the cable fault test.
Path testing unit
The transmitter is highly integrated within the system.
The receiver is small in size and light in weight, making it easy to carry and path track.
Determine the cable path based on the size of the receiver speaker sound and display signal strength bars.
Insulation resistance test unit
The unit is digital, and the LCD screen can display the working status and test results of the instrument.
The instrument has power-on self-test function and automatic calibration function.
Automatically complete the measurement of absorption ratio, polarization index and insulation resistance.
Using digital filtering technology, strong anti-interference ability.
Using 2600mAh large capacity rechargeable lithium battery pack.
With overload, automatic discharge, short circuit protection and other functions.
Specifications
Trolley parameters
Dimensions: 530(L)*430(W)*960(H)mm
Weight: 50kg
Input power: AC220V, 50Hz
Charging adapter: DC12V, DC16.8V
Fault test unit
High integration, low power consumption, integrated design, high stability.
It can test all kinds of faults of power cables with different voltage levels below 220kV, different cross-sections, different media and various materials, including: open circuit, short circuit, low resistance, high resistance leakage, high resistance flashover fault.
It can also be used to test various faults of railway communication control cables, street lamp cables, airport signal cables, and mining power cables.
The speed of wave propagation in any cable of known length can be measured.
Power supply and power consumption: AC220V±10%, not more than 15W; DC12V (7AH) not more than 20W.
Standby time: about 6 hours of continuous use.
High frequency high voltage power supply unit Mainly used for sampling impulse discharge of high resistance fault waveform during fault testing of 32kV and below power cables, and for precise determination of fault points for impulse discharge.
Output mode: pulse output, DC output
Output voltage: negative pressure, ≤ 32kV
Working current: ≤ 40mA
Working mode: single pulse, continuous pulse, DC output
Built in capacitor: 4uF/32kV
Discharge energy: ≤ 2450J
Pulse period: 3s~8s adaptive
Automatic discharge: automatic discharge during shutdown
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