Underground Cable Detection, Underground Cable Fault Location System
General Information:
The complete set of instruments can solve all the faults of power cables below 35kV. The complete set is composed of four units:
1.Fault location unit: cable fault location host + multiple pulse controller
The color LCD touch screen is adopted, which is simple to operate and easy to read the waveform. At the same time, the ranging system can automatically locate the distance of the fault point, and the fault location is simple and easy.
2.Tracking and identification unit: fully digital multi-function cable detector
The path search adopts all-digital electromagnetic induction technology, which can easily solve the running or non-operating cable direction and identification problems, especially the problem of metal dead ground fault that could not be solved in the past.
3.Fault fixed-point unit: intelligent locator
The precision locator equipped with the system has sound and magnetic waveform display, strength indicator; it can prompt the distance and path of the fault and many other functions.
4.High-voltage signal unit: ultra-light high-frequency and high-voltage signal generator
It is the energy supply part for pre-positioning and precise positioning of the cable fault, and provides high-voltage and high-energy voltage pulses for the cable. It has the advantages of simple wiring, small size, light weight, and convenient movement.
Features:
A. Ranging unit: cable fault location host + multiple pulse controller
- Without high-voltage equipment, it can test any cable short circuit, disconnection fault distance, cable length and wave speed.
- With the cooperation of high-voltage equipment, it can test all fault distances such as high resistance, low resistance, and single grounding of cables of 35KV and below.
- With multiple pulse test function, it can make high-resistance faults show low-resistance short-circuit characteristics, greatly simplify the analysis of high-resistance fault waveforms, and reduce the degree of dependence on experience in distance measurement.
- The large-screen color touch LCD screen is used as the operation and display terminal. The buttons are defined in English, simple and clear, accurate and reliable; color display, English prompts, and man-machine dialogue are clear at a glance.
- Highly integrated industrial computer, computer control, software operation; peripheral communication interface, convenient for data and waveform transmission and storage.
- Provides 7 kinds of pulse width test pulses to ensure measurement accuracy and meet the requirements of long cable testing far enough and short cable testing without blind areas.
- Multiple analysis methods such as zooming, scrolling, storage, recall, and wave shift comparison are set up, covering waveform analysis as short as a few meters long to dozens of kilometers.
- Double trace display, convenient for waveform comparison, clear details at a glance.
- The whole machine is reliable and durable, with a high degree of intelligence, and can automatically determine the distance without interference from strong magnetic fields.
- Rechargeable battery power supply, convenient and flexible on-site use.
- Main performance indicators:
- Test methods: low-voltage pulse method, high-voltage flashover method, three pulse method, eight pulse method, wave speed test.
- Sampling rate: 100MHz, 60MHz, 40MHz, 20MHz.
- Test distance: >30Km.
- Resolution: 1m.
- Pulse width setting: "0.05", "0.1", "0.2", "0.5","1", "2", "8" microseconds.
- Wave speed setting: cross-linked ethylene, polyvinyl chloride, oil-impregnated paper, no dripping oil, unknown type.
- Discrimination method: manual discriminant, automatic discriminant.
- Analysis settings: scroll, zoom, save, recall, wave shift.
- Power supply: Built-in rechargeable battery, can work continuously for more than 8 hours after fully charged.
- Working conditions: temperature -10ºC~+45ºC, relative humidity 90%.
- Physical characteristics: volume 280mm×240mm×120mm weight 2kg
- Multi-pulse controller: Allow input impulse voltage below 30KV. Volume 370mm×260mm×150mm
B. Path finding and identification unit: all-digital multifunctional cable detector
- There are three test methods: direct connection method, coupling method and induction method. The coupling method can detect the path of running cables; the induction method can blindly detect the path of underground cables.
- Intelligent, digitized, and multi-frequency technical advantages enable it to identify cables, especially its live cable identification function.
- It is simple and convenient to test the open circuit fault and short-circuit fault of the cable. For example, the street lamp cable fault test has an area judgment function. The test process does not require mains power supply, no load removal, no high voltage application, and no waveform analysis.
- There are five detection frequencies-low frequency, intermediate frequency, high frequency, radio frequency, 50Hz. Because of the multiple frequencies, the test under various conditions can be easily realized.
- The unique induction testing method is especially suitable for "blind testing" of metallic pipelines such as underground cables, optical cables, and water pipes.
- Cable buried depth measurement is one-key direct reading; built-in ohmmeter can measure loop resistance and judge the nature of the fault.
- All-digital processing, large-screen LCD display, bar delete instructions, digital display, and voice prompts make you easy to operate.
- The whole set of equipment is made of engineering plastic case, which is strong and durable.
- Main performance indicators:
Transmitter
- Output signal: output sinusoidal AC signals of four frequencies, namely low frequency, intermediate frequency, high frequency, and radio frequency;
- Output power: constant power output, low, medium and high three gears (maximum not less than 6 watts);
- Output mode: direct connection method, coupling method, induction method;
- Impedance display: within 99999 ohms;
- Load matching: 1-10000 ohms;
- Display interface: large-screen LCD Chinese, graphic display, with backlight;
- Power source: 6 standard 1.2V rechargeable batteries, charge and discharge 500 times;
- Standby time: more than 8 hours, power prompt;
- Overheating and overcurrent: automatic protection;
- Working temperature: -20ºC-50ºC
Receiver
- Receiving frequency: receiving sinusoidal AC signals of five different frequencies, namely low frequency, intermediate frequency, high frequency, radio frequency, and 50HZ;
- Receiving mode: wave crest method (horizontal coil), trough method (vertical coil), external device method (A-frame, coupling clamp);
- Signal interface: three interfaces of digital size, grating length, and voice prompt simultaneously indicate the strength of the signal;
- Display interface: large-screen LCD Chinese, graphic display, with backlight;
- Gain control: manual adjustment, dynamic range 000-100db;
- Detection length: when the cable is directly connected, the maximum length is 15KM;When coupling cables, one coupling can measure 3Km, and multiple couplings can be infinite;When the cable is inducted, it can measure 300m in one induction, and infinite in multiple inductions;
- Depth measurement: direct reading detection depth, range 000-250cm;80% method for measuring depth, range 000-250cm (induction)\500cm (direct connection);
- Current measurement: direct reading current, range 000-999mA;
- Detection accuracy: 5% of buried depth;
- Power source: 6 standard No. 5 1.2V rechargeable batteries, charge and discharge 500 times;
- Standby time: more than 12 hours, power prompt;
- Overheating and overcurrent: automatic protection;
- Working temperature: -20ºC-40ºC
C.Fault fixed-point unit: intelligent locator
- Enhanced acousto-magnetic synchronization precise point determination method; Acousto-magnetic synchronization receiving, strong anti-interference ability.
- Magnetic field and sound signal waveform display, the typicality and consistency of the magnetic field and sound waveform generated by the discharge at the fault point are very high, it is easy to distinguish the signal and noise pair, and further enhance the anti-interference ability; the observation waveform replaces the human ear voice recognition, reducing experience requirements .
- The cursor measures the acoustic and magnetic delay, which can be used to judge the distance of the fault point and improve the accuracy of the fixed point.
- The path can be detected in the fixed-point process: on both sides of the cable, the initial polarity of the magnetic field waveform is opposite, and the path can be detected based on this auxiliary.
- Increased and enhanced high-sensitivity piezoelectric vibration sensor to capture subtle signals.
- High-performance active noise-cancelling headphone monitoring.
- Power management: When there is no operation within 30 minutes, it will automatically shut down to reduce power consumption; when the battery is undervoltage, the instrument will also automatically shut down to protect the battery.
- Main performance indicators:
- Magnetic field channel gain: 0-80dB adjustable.
- Sound channel gain: 0-80dB adjustable.
- Battery: Built-in lithium battery battery pack, nominal voltage 7.4V, capacity 2800mAh.
- Battery power supply time: It can be used continuously for more than 7 hours; the use time is shortened when the backlight is turned on, and the actual use time is related to the time when the backlight is turned on.
- Charger: input AC100-240V, 50Hz/60Hz; output 4.8V, DC1A.
- Volume: 274mm×218mm×81mm (host)
- Mass: 1.5kg (host); 0.5kg (acousto-magnetic synchronous sensor)
- Conditions of use: temperature -20ºC-40ºC; humidity 5%-90%; altitude <4500m.
- Protection level: IP65
D. High-voltage signal unit: ultra-light high-frequency high-voltage signal generator
- This machine adopts advanced resonance module boost technology, industrial computer automatic control, voltage preset automatic boost, automatic voltage regulation, reliable and stable work.
- It has automatic protection functions such as overload, short circuit, open circuit, and machine abnormality.
- LCD display, electronic dial, and working status prompts realize man-machine dialogue.
- The output voltage value is high-voltage direct-reading display, which can ensure that the high-voltage side voltage can still be displayed correctly in the stopped state, which provides guarantee for safe operation.
- Not afraid of high voltage, high current discharge impact, can work continuously for more than 4 hours for a long time.
- High voltage zero start, to ensure that the output high voltage is adjusted from 0.
- The box body is made of insulating material, which conforms to the safety operation regulations.
- Small in size and light in weight (10kg), it can completely replace the step-up transformer and control box weighing up to 60kg; it has realized the purpose of convenient movement, simple wiring, and not restricted by the site.
- Main performance indicators:
- Maximum output voltage: 32KV
- Maximum working current: 40mA
- External high voltage capacitor: 2uF/32KV
- Discharge energy: ≤1024J/5S
- Instant charging current: >1.5A
- Display voltage value error: <±2%
- Minimum discharge cycle: 3 seconds
- Maximum power: <1.5KVA
- Working voltage: 220V±10% 50Hz
- Working environment: temperature -20ºC~50ºC; humidity (relative) ≤80%; altitude below 4000 meters.
More information, please kindly contact with us, we can customize the suitable test set according your requirements and give you the best quotation. Thank you!
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