Product Features
Through continuous development and innovation, the product possesses the following characteristics:
- basis for cable installation, maintenance and management .
- Wave velocity verification: By verifying the signal propagation speed in the cable, the accuracy of fault location can be improved.
- Based on the principle of multiple pulses, various power cable main insulation faults can be pre-located.
- Embedded design, Chinese interface, stable operation.
- It adopts distributed control bus technology, which has a high degree of automation, is simple to operate, and is convenient for testing and wiring.
- The output high-voltage pulse frequency is controllable, and the impact energy is large, meeting the requirements for pre-positioning and precise positioning.
- DC high voltage output, continuous high current burn-through, rapid carbonization of high resistance fault points (such as water inlet cables).
- It provides a stable output of 2,048J of high impact energy, making it particularly suitable for internal faults in high-resistance connectors.
- Used for conducting cable withstand voltage tests, efficiently detecting cable insulation performance and potential faults .
- It features a grounding protection safety monitoring system , a test site video monitoring system , and step voltage safety protection and self-testing functions , ensuring the personal safety of operators to the greatest extent possible.
- Optional wireless walkie-talkies can be equipped to enable timely communication between the fault location site and vehicle personnel, and to quickly handle abnormal situations.
1.2 Technical Specifications
1.2.1 Vehicle-mounted test main control system
- It can test various main insulation faults of power cables with different voltage levels, cross sections, media and materials, including: open circuit, short circuit, low resistance, high resistance leakage, and high resistance flashover fault.
- Display method: 15-inch industrial-grade LCD screen (Linux operating system), with a resolution of 1024*768 .
- Storage space: 32GB electronic disk.
- Test methods: low-voltage pulse , high-voltage flashover , multiple pulses , DC/burn-through .
- Burn-through mode: Output voltage 0-40kV, output current 0-100mA.
- Operation method: photoelectric knob operation (touch screen function is optional).
- Pulse width/pulse amplitude (100ns ~ 10 μs , 120V).
- Gain adjustment (-20 ~ +40dB).
- Output impedance matching ( 120 Ω ) .
- Test distance: 5m ~
- Minimum test distance (blind zone): 5 meters.
- Precise positioning error: ±0.2m.
- Test error: System error is less than ±1%.
- Multiple pulse generator: impulse voltage ≤40kV.
- Resolution: ( v /2)* f meters ( v /2 : half-wave velocity m/ μs ; f : sampling frequency MHz).
- Sampling frequencies: 200MHz, 100MHz, 50MHz, 25MHz, 12.5MHz, 6.25MHz.
- Positioning accuracy: ±(0.2%·L+1)m .
1.2.2 Vehicle-mounted high-voltage control system
- Output voltage: 0-32kV continuously adjustable .
- Start the high-voltage equipment with the authorized key.
- Built-in capacitors: Three capacitor levels : 4 μF /32kV, 16 μF /16kV, and 64 μF /8kV.
- Maximum impact energy: 2048J.
- Operating modes: continuous flashover, single flashover, DC high voltage.
- Continuous pulse period: 1 to 10 seconds.
- Display device: 5-inch color LCD with a resolution of 800*480.
- Prompt format: English prompts, with numbers displayed intuitively.
- The control software operates stably under high voltage.
- Automatic discharge function: After pressing the emergency stop button or powering off, the instrument will automatically discharge all remaining power.
- Input voltage: AC220V±10%/50Hz.
1.2.3 Vehicle-mounted cable reel and safety monitoring system
- Safety monitoring module: Real-time monitoring of the FOHM loop circuit, FU step voltage (whether it is within acceptable limits), secondary pulse overheating (whether it is normal), and whether the " threshold switch" is closed. If any signal is abnormal, a pop-up window will appear on the host interface displaying information for each signal. When an abnormality occurs, the host will simultaneously cut off the power to the high-voltage section, and the high voltage will automatically discharge. After the abnormal signal is processed, the four monitoring signals will return to normal, the host pop-up window will automatically disappear, and the power to the high-voltage section will return to normal.
- High-voltage cable reel : 50m.
- System grounding wire panel : 50m.
- Power cord reel: 50 m .
- Step voltage line reel : 15m.
- Safety contact switch: As shown in Figure 3.5 ③ “ Threshold switch” socket , it can be expanded into a door safety contact switch .
1.3 Usage Conditions
- Operating temperature: -10℃～+45℃
- Relative humidity: ≤90% (no condensation)
2.1.1 Cable Fault Types
■By the cause of the malfunction:
- Forced failure due to external forces (forced failure)
- Failures caused by non-external forces (non-forced failures)
☆ Connector Failure
☆ Outer sheath failure
☆ Body failure
■According to the nature of the fault:
- High resistance fault (insulation resistance value above 1k ohms)
- Low resistance fault (insulation resistance value below 1k ohms)
● Dead ground fault (insulation resistance value close to zero)
