Intelligent Cable Fault Tester

Intelligent Cable Fault Tester

MOEORW-WLG921 Cable Fault Tester is a professional device for cables ≤35kV, consisting of a fault tester, path finder and acoustic-magnetic locator. Integrating rough measurement, path finding and precise positioning, it features accurate testing and easy operation, suitable for cable operation and maintenance in power, industrial, municipal and other scenarios.

The multiple pulse cable fault testing system is a power cable fault testing specialized system equipment developed and produced by our company based on the rapid progress of the power industry and market demand. It is mainly used for testing open circuit, short circuit, grounding, low resistance, high resistance flash-over and high resistance leakage faults of power cables, as well as precise testing of open circuit and short circuit faults of coaxial communication cables and local telephone cables; It can also measure the speed of radio waves, measure the length of cables, and establish cable files for daily maintenance and management. It mainly includes five parts: Cable Fault Tester, Acoustic & Electromagnetic Synchronous Fault Locator, Cable Path Signal Transmitter, and Surge Voltage Generator.

Cable Fault Tester

1. Sampling method: Low-voltage pulse method, shock flashover method, velocity measurement method (extended to three-pulse method, eight-pulse method)

2. Sampling rate: 200 MHz, 100 MHz, 80 MHz, 40 MHz, 20 MHz, 10 MHz

3. Pulse width: 0.05 μ s. 0.1 μ s. 0.2 μ s. 0.5 μ s. 1 μ s. 2 μ s. 8 μ S

4. Wave speed setting: cross-linked ethylene, polyvinyl chloride, oil-immersed paper, non dripping oil, and unknown type self setting.

5. Impulse high voltage: 40kV and below

6. Test distance: ＜ 60km

7. Resolution: 1m

8. Test accuracy: 1m

9. Display method: Industrial grade 8.0-inch color touch LCD screen.

10. Operation mode: touch screen operation, physical knob operation.

11. Analysis settings: functions such as scrolling, zooming, saving, calling out, wave shifting, etc.

12. Working power supply: Built in battery power supply, passive operation of coupling unit.

13. Continuous operation: ＞ 4h (external power supply can also be used).

14. Storage function: With data storage function, it can store a large number of on-site wave-forms and data, and can be called up and used at any time.

15. Waveform analysis: All high resistance fault wave-forms are only characterized by short circuit fault wave-forms using the low voltage pulse method, which is convenient for analyzing stuck points.

16. Waveform processing: It can display the measured waveform of the fault point and the full-length open circuit waveform of the good phase simultaneously on the screen for comparison and superposition, and can automatically determine the fault distance.

17. Overall dimensions: L 415mm × W 319mm × H 168mm(including outer box)

18. Weight: 2.2kg bare metal, including 4.5kg box

Acoustic & Electromagnetic Synchronous Fault Locator

1. Digital display distance：max 500m,min0.1m.

2. The rough measurement error is less than 10% and the fixed point error is zero.

3. Electromagnetic channel gain≥110dB.

4. Sensitivity of electromagnetic channel receiver≤5μV.

5. Audio channel amplifier gain≤120dB.

6,Power frequency rejection capability＞40dB.

7. Acoustoelectric synchronization display monitoring: that is, when the site is located, the digital screen will count repeatedly under the impact electromagnetic wave formed by the impact high voltage, and display the fault distance or full brightness (500.0 m). At the same time, the high-resistance headphones monitor the seismic waves generated when the fault point of the cable breaks through the impact discharge, so as to eliminate the environmental clutter

8. When the acoustic sensor probe is replaced with 15kHz electromagnetic sensor probe, it can be used for accurate detection of cable path and cable buried depth.

Power supply: built-in rechargeable battery power, continuous working hours > 12 hours

Power dissipation：≤0.7W

Dimensions: length 415mm × width 369mm × height 168mm

Weight: 6.5kg

Cable Path Signal Transmitter

1. Output power：When the load resistance for 10 Ω, output power greater than 60 w, and continuously adjustable.

2. Working frequency：15kHz

3. Working mode: intermittent (repeat cycle: 1Hz/ s), constant amplitude, amplitude modulation

(modulation frequency: 400-1000hz) and Equiamplitude output are suitable for beating

receiver, and amplitude modulation output is suitable for direct amplifier double voltage detection

receiver

4. With automatic overheat and overload protection function, it can work for more than 8 hours continuously

5. Working powder：AC 220V ±10%,50Hz

6. Environment：temperature -20～50℃,The humidity is less than 95%

7. Dimensions: length 415mm × width 369mm × height 168mm

8. Weight: 6.2kg.

Surge Voltage Generator

[High voltage test transformer parameters]

1, capacity: 5kVA

2. Input voltage: AC200V 50Hz

3, input current: 15A

4, the output voltage: AC: 50kV DC: 70kV

5, output current: AC: 60mA DC: 42.8 mA

[Main parameters of the control box]

1, capacity: 5kVA

2. Input voltage: AC220V, 50Hz

3. Input current: 13.6A

4, the output voltage: 0 ~ 250V

5, the output current: 0 ~ 25A

This set of testers includes a cable fault tester, a cable path finder and an acoustic-magnetic synchronous positioning instrument, suitable for the detection of all types of faults in power cables of 35kV and below. Integrating rough measurement, path finding and precise positioning, its core features are as follows:

Full fault coverage: Capable of testing open circuit, short circuit, grounding, low resistance, high resistance flashover/leakage faults of power cables, as well as open and short circuit faults of coaxial/telephone cables. It can also measure cable length and wave velocity, and establish cable archives.

Advanced and accurate technology: Adopting Time Domain Reflectometry (TDR) technology, the fault waveform can automatically judge the distance, and the high-resistance fault presents a simple short-circuit waveform characteristic; the multi-pulse method can collect 8 waveforms simultaneously, with the test accuracy and resolution both reaching 1m, and the maximum test distance less than 60km.

Easy and user-friendly operation: Equipped with a 10.4-inch industrial color touch LCD screen, a full Chinese operation interface with text prompts, supporting both touch screen and physical knob operation; the global and local waveforms are displayed synchronously, and the waveforms can be zoomed, scrolled, saved and compared, enabling non-professionals to get started quickly.

Compatible with multiple test methods: Supporting low-voltage pulse method, impulse flashover method, triple/multi-pulse method and velocity measurement method, it can cooperate with high-voltage equipment to complete various fault detection without test blind spots.

Strong environmental adaptability: The host is housed in an industrial safety protection case with IP67 protection grade, which is compact and portable (weighing 3.8kg); powered by a built-in battery, it can work continuously for more than 4 hours and is usable in power-free environments, with stable performance and no crash in various environments.

Efficient path finding: The path finder features high output power, with a detection distance of more than 10km. It can suppress power frequency interference and other interferences, accurately detect the path and burial depth of underground cables, and support continuous operation for more than 8 hours.

Precise and fast positioning: The acoustic-magnetic synchronous positioning instrument displays the fault distance digitally (0.1-500 meters), with zero positioning error and a rough measurement error of less than 10%; it has strong anti-power frequency interference capability and can work in strong interference environments. The built-in battery supports continuous operation for more than 12 hours, and it can also perform precise positioning directly on the cable body, solving the positioning problem of overhead/cased cables.

Practical and thoughtful functions: The host has a built-in storage function to save a large number of waveform data; the sampling rate, pulse width, wave velocity and measurement accuracy are adjustable in multiple gears to adapt to different test scenarios; all equipment is equipped with overheating and overload protection for safe and reliable use.