GD-4138H Cable Fault Locating System
● 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.
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.
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.
● Display mode: 12.1-inch industrial-grade LCD screen (Linux operating system).
● Storage space: 4G electronic disk.
● Test methods: low-voltage pulse method, impulse current method, multiple pulse method.
● Operation mode: knob mouse operation.
● Test distance: not less than 50km.
● The shortest test distance (blind zone): 5 meters.
● Accurate point error: ±0.2m.
● Test error: the system error is less than ±1%.
● Multiple pulse generator: Impulse voltage ≤40kV.
● Resolution: v/f m; v is wave velocity m/μs; software cursor 0.10 m.
● Sampling frequency: 200MHz, 100MHz, 50MHz, 25MHz, 12.5MHz, 6.25MHz.
● Pulse width: 100ns, 200ns, 500ns, 1μs, 2μs, 5μs (software automatic matching).
● 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
● Working power supply: power frequency 220V ± 10%
● Display screen: 800 × 480 resolution touch screen display
Path test unit
● Detection distance: 5km
● Detection depth: 3m
● Routing error: 5cm
Basic parameters of the transmitter
● Output frequency: transmit frequency 9.6kHz
● Output power: 5W
Basic parameters of routing receiver
● Input frequency: 9.6kHz
● Detection routing error: ±2cm
● Probe depth error: ±5cm.
● LCD display: bright true color screen, pixel 320 x 240, suitable for outdoor use.
Insulation resistance test unit
● Output voltage: 500V, 1000V, 2500V, 5000V.
● It has automatic test functions of absorption ratio, polarization index, quick test and insulation test.
● With automatic discharge function, and the discharge speed is fast.
● It has protection functions such as short circuit, overload, overcurrent and battery undervoltage.
● The standby time reaches 10 minutes and automatically shuts down.
● Power supply: adapter input: AC220V, 50Hz, output: DC16.8V.
Ultra-quiet intelligent fixed-point instrument part
● Sensor dynamic range: sound channel >104dB, magnetic field channel >110 dB
● Sensor frequency range: 100 Hz---1500 Hz
● Impact discharge sound amplification >90dB, impact discharge volume upper limit 84dB(A) can be turned on or off
● Wave Setting: No filter 100 Hz---1500 Hz
● Low-pass filter: 100Hz---400 Hz
● Band-pass filter: 150Hz---600 Hz
● High-pass filter: 200Hz---1500 Hz
● LCD display: bright true color screen, 320 x 240 pixels, suitable for outdoor use.
● On-site continuous working time: Alkaline battery can be replaced, convenient for on-site use.
