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.
Functions
?Fault test unit (built-in)
??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 eight sampling frequencies from 3.125MHz to 400MHz, 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 waveform for selection on the same screen, and automatic and manual processing modes, enabling dual clamping operation of waveform. The double cursor movement can be accurate to 0.5meters, improving testing accuracy and reducing waveform errors.
??Built-in measured waveform 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.
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High frequency high voltage power supply unit
??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 4 hours, which meets the longest working time of the cable fault test.
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Specifications
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Trolley parameters
???Dimensions: 530(L)*430(W)*960(H)mm
???Weight: ≤90kg
???Input power: AC220V±10%, 50Hz
???Charging adapter: DC16.8V
Fault test unit
??It adopts a 12.1in large screen, knob mouse control, high-brightness LCD display, suitable for outdoor use in the sun, lithium battery power supply, convenient on-site testing. Engineering plastic chassis, shockproof and moisture-proof, with strong stability.
??The flash tester with WIFI module and SIM interface can realize the remote transmission and technical support of measurement data by mobile terminal. It adopts integrated communication technology, the acquisition signal is stable, and the host can automatically select eight sampling frequencies from the lowest 3.125MHz to the highest 400MHz, with adaptive pulse width, which can meet the test requirements of cables of different lengths.
???The software realizes three automatic switching methods: low-voltage pulse method, flash current method, and multiple pulse method. The wiring is simple and the test is intuitive. The test waveform knee point is fully automatically identified and searched, the waveform fault knee point is automatically positioned, and the fault distance is automatically read and displayed.
??The waveform is displayed in three areas on the same screen, and ten measured waveform are randomly displayed on the same screen for selection. At the same time, two modes of waveform position verification are realized, automatic and manual processing, and the test waveform data storage, playback and analysis functions are available.
???The unique multiple pulse generator design can obtain ten low-voltage short-circuit pulse waveform in one discharge, automatically select the standard waveform, and greatly reduce the interference of large oscillations.
???The precise point finder adopts the double-selection technology of noise filtering, which can directly and digitally display the change of the distance between the test point and the fault point, and detect the direction of the cable path at the same time.
???The precise point finder can support mobile phone APP, connect the mobile phone and headphones via Bluetooth, and realize quick point finding by two people with one probe at the same time.
??The professional cable quick test APP supports remote assistance to users in waveform analysis, case sharing, teaching and training, simulated exams, etc. anytime and anywhere.
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??It can test all kinds of faults of power cables with different voltage levels, different cross-sections, different media and various materials, including: open circuit, short circuit, low resistance, high resistance leakage, high resistance flash-over fault.
??Display mode: 12.1-inch industrial-grade LCD screen (Linux operating system).
??Storage space: 32G electronic disk.
??Language: Chinese, English, Russian three languages switch.
??Test methods: low-voltage pulse method, impulse current method, multiple pulse method.
??Operation mode: Touch screen plus photoelectric knob dual operation.
??Pulse width/pulse amplitude (100ns~10μs, 120V).
??Gain adjustment (-20…+40dB).
???Output impedance matching (120Ω).
???The flash tester is equipped with a WIFI module and a SIM interface to enable remote transmission of test data.
???Test distance: 5m-100km.
??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/2f m; v is wave velocity m/μs; f: sampling frequency MHz.
??Sampling frequencies: 400MHz, 200MHz, 100MHz, 50MHz, 25MHz, 12.5MHz, 6.25MHz, 3.125MHz.
???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.
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High frequency high voltage power supply unit
It is mainly used for sampling impulse discharge of high resistance fault waveform during fault testing of 220kV and below power cables, and for precise determination of fault points for impulse discharge.
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???Output mode: pulse output, DC output
??Output voltage: negative voltage, ≤ 32kV
??Working current: ≤10A
???Working mode: single pulse, continuous pulse, DC output
??Built in capacitor: 4uF/32kV
???Discharge energy: ≤ 2048J
??Pulse period: 4s~9s adaptive
??Automatic discharge: automatic discharge during shutdown
???Working power supply: power frequency 220V ± 10%
???Display screen: 800 × 480 resolution touch screen display.
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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.
Receiver
| Function | Pipeline detection (cable position tracking, direction display, depth measurement, current measurement), cable identification, cloud service, Bluetooth communication, ground resistance test, external voltage test. |
| Power supply | 7.4V DC 2600mAh rechargeable Lithium battery group |
| Input mode | Built-in receiving coil, flexible clamp, stethoscope, test wire with crocodile clamp (voltage test) |
| Receiving frequency | Active detection frequency: 577Hz, 640Hz, 1280Hz, 2.56kHz, 3.20kHz, 4.09kHz, 8.19kHz, 10kHz, 33kHz, 66kHz, 82kHz, 201kHz.
Power frequency passive detection frequency: 50Hz, 250Hz RF passive detection frequency band: center frequency 33kHz, 82kHz. |
| Detection mode | Broad peak method, narrow peak method, valley method. |
| Auxiliary function | GPS pipeline detection, LED night lighting |
| Pipeline detection display | Classic positioning mode, wire cruise mode, signal curve mode |
| Detection range of pipeline detection | Direct connection method: Generally, the cable length can reach 0~20 km, which is mainly determined by the ground resistance, cable resistance and cable buried depth.
Coupling method: Generally, the cable length can reach 0~10km, which is mainly determined by the ground resistance, cable resistance and cable buried depth. Induction method: It is suitable for cables buried less than 2m. |
| Pipeline depth, current detection | Automatic reading cable depth and current |
| Measurement depth of pipeline measurement | 0-20m |
| Depth accuracy | Precise positioning accuracy of plane position, the center axis position of the target cable or pipeline: ±5% (depth 0-3m)- 10% (depth 3-20m) |
| True or False Tips | Eliminate interference from adjacent cables. When measuring adjacent cables, the measurement of adjacent cables can be distinguished based on the different signal strengths and measured current phases of the adjacent cables. In the process of tracing the cables, observe the phase dial and pointer to distinguish the measured cable from the adjacent cables. |
| Sound indication | FM tone that changes with signal strength. |
| Anti-interference ability | Extremely narrow receiving frequency band, unique digital processing method, can fully suppress the power frequency and harmonic interference of adjacent running cables and pipelines. |
| Interference distance | When using the coupling method and the induction method, the transmitter will generate interference at close range.
The interference distance is related to the transmission power and frequency. The greater the power and the higher the frequency, the stronger the interference. The minimum distance at which the receiver is not interfered by the transmitter often needs to be determined by test. Pipeline detection: 5m away for the coupling method and 20m away for the induction method can be confirmed as no interference. Cable identification: 2~5m away for the coupling method can be confirmed as no interference. |
| Cable identification | Identification method: flexible clamp identification, stethoscope identification.
Number of calibrated cables: 1 to 10pcs. Calibration value: The current percentage of the receiving signal and the transmitting signal is between 75% and 135% of the calibration value, which is one of the conditions for successful identification. Directionality: The transmitting clamp, the receiving clamp and the loading signal must be in the same direction, which is one of the conditions for successful identification. |
| Detection range of cable identification | Direct connection method: can identify signals with a loop resistance of 0Ω to 8kΩ (usually can reach a cable length of 0 to 20km, mainly determined by the ground resistance and cable resistance)
Coupling method: can identify signals with a loop resistance of 0Ω to 1kΩ; (usually can reach a cable length of 0 to 6km, mainly determined by the ground resistance and cable resistance) |
| Ground resistance | Test range: 0.001Ω~2.00kΩ
Test method: Precision 4-wire measurement Test current: 6.00mA max |
| Voltage measurement | Range: AC 0-600V, accuracy: ±2%±3dgt |
| GPS pipeline map | receiver + Android APP can realize high-precision positioning measurement, management and viewing of underground pipeline geographic coordinates, depth and other information. |
| LED night lighting | With LED flashlight function |
| Display | 3.5inch color screen |
| Size | 290*128*700mm |
| Weight | About 2kg |
| Charger | DC 8.4V 1A |
| Lighting power | 1W max |
| Connection interface | 1*mini-B USB interface (for firmware upgrade)
1*DC charging port 1*flexible clamp connection socket 2*external voltage test cable interface 4*ground resistance test cable interface |
| Flexible current clamp | about 620mm long, wire diameter about 8mm |
| Coil inner diameter | φ200mm(can be customized with larger diameter as needed) |
| Stethoscope size | 111*60*27mm (For option) |
| Test lead length | Stethoscope lead length: about 3m |
| Test cable | 1*yellow test cable 15m
1*red test cable 10m 1*green test cable 3m 1*black test cable 3m |
| Working temperature and humidity | -10℃～50℃; below 80%Rh |
| Storage temperature and humidity | -10℃~50℃; ≤95%RH, no condensation |
| Withstand voltage | AC2000V/rms (before the front and rear ends of the shell) |
| Applicable safety standards | IEC61010-1 CAT III 600V, IEC61010-031, IEC61326, pollution level 2
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Transmitter
| Function | Multi-frequency signal transmission, insulation resistance test |
| Power supply | 11.1V DC 12800mAh rechargeable Lithium battery group |
| Output mode | Direct connection method, clamp coupling method and induction method |
| Output frequency | 577Hz, 640Hz, 1280Hz, 2.56kHz, 3.20kHz, 4.09kHz, 8.19kHz, 10kHz, 33kHz, 66kHz, 82kHz, 201kHz. |
| Output power | 10W max. 10ranges can be adjustable |
| Impedance | Automatic real-time impedance matching and protection function |
| Direct connection output voltage | 150Vpp max. |
| Circuit protection | With over-load and short-circuit protection |
| Insulation resistance test voltage | 100V, 250V, 500V, 1000V, 2500V |
| Measurement range and accuracy of insulation resistance | 0.01MΩ~25.0GΩ ±3%rdg±5dgt
25.0GΩ~2.5TΩ ±15%rdg±5dgt |
| LCD display | 5.6inch LCD color screen |
| Size | About 320*275*145mm |
| Weight | Transmitter about 3.85kg, transmitting clamp about 1.18kg. |
| Charger | DC 12.6V 2A |
| Transmitting clamp size | About 297*194*39mm, internal diameter φ150mm, wire length 3M |
| Test cable | Red cable 3m, green cable 3m, black cable 3m |
| Connection interface | 1*Type-B USB interface (for firmware upgrade)
1*DC charging port 1*transmitting clamp connection socket 2* direct connection cable interface 3*insulation resistance test cable interface |
| Pressure resistance | The transmitter uses an integrated special tool box design, and the box can withstand a pressure of about 200kg. |
| Withstand voltage | AC3700V/rms (between the top and bottom of the instrument box) |
| Electromagnetic characteristics | IEC61326 (EMC) |
