Cable fault detection instruments are indispensable tools in fields such as power and communication, used to quickly and accurately locate and diagnose cable faults. Here are some common cable fault detection instruments and their functional characteristics:
1. Time Domain Reflectometer (TDR)
① Principle: Send a pulse signal to the cable and determine the location and type of the fault based on the time and amplitude of the reflected wave.
Scope of application: Open circuit, short circuit, high resistance faults.
② Characteristics:
High positioning accuracy (up to meter level).
Easy to operate, suitable for rapid on-site testing.
Widely used for fault location of low-voltage cables and communication cables.
2. Pulse current method instrument
① Principle: Analyze the fault distance by measuring the pulse current waveform generated by the discharge at the fault point.
Scope of application: High resistance and flashover faults.
② Characteristics:
Strong anti-interference ability, suitable for high-voltage cable fault detection.
It needs to be used in conjunction with a high-voltage generator.
3. DC high-voltage flashover tester
① Principle: Apply DC high voltage to the cable to cause the fault to click through discharge, and locate the fault by measuring the discharge waveform.
Scope of application: High resistance and flashover faults.
② Characteristics:
Suitable for long-distance and large cross-section cables.
Attention should be paid to safe operation to prevent injury from high voltage.
4. Low voltage pulse reflectometer
① Principle: Similar to TDR, but using low-voltage pulse signals, suitable for low impedance fault detection.
Scope of application: Low resistance and short circuit faults.
② Characteristics:
High safety, no need for high-voltage equipment.
High positioning accuracy, suitable for medium and low voltage cables.
5. Cable fault location system (acoustic magnetic synchronization method)
① Principle: By combining sound waves and magnetic field signals, the location of the fault point is determined through synchronous detection.
Scope of application: When the cable path is unclear or the fault point is deep.
② Characteristics:
High positioning accuracy, with an error of less than 1 meter.
It needs to be used in conjunction with a path detector.
6. Cable path detector
① Principle: By using electromagnetic induction or radar technology, detect the direction and burial depth of cables.
Scope of application: When the cable path is unclear or the cable direction needs to be confirmed.
② Characteristics:
Quickly locate cable paths and assist in locating fault points.
Suitable for various laying methods such as direct burial, pipelines, cable trenches, etc.
7. Insulation resistance tester
① Principle: Measure the insulation resistance of the cable to determine its insulation performance.
Scope of application: Preventive testing, preliminary fault diagnosis.
② Characteristics:
Portable design, easy to operate.
Suitable for insulation testing of low-voltage cables.
8. Voltage tester
① Principle: Apply high voltage to the cable to detect insulation breakdown.
Scope of application: Factory testing and handover testing of cables.
② Characteristics:
It needs to be used in conjunction with protective devices to ensure safety.
Suitable for insulation performance testing of high-voltage cables.
9. Other auxiliary equipment
Cable identification device: used to identify the phase sequence and direction of cables.
Grounding resistance tester: measures the grounding resistance of cables to determine if the grounding system is functioning properly.
Cable Fault Testing Vehicle: Integrated with multiple testing functions, suitable for large-scale on-site inspections.
10. Intelligent cable fault tester
characteristic:
Integrating multiple testing methods such as TDR, pulse current method, and acoustic magnetic synchronization method.
Capable of data analysis, storage, and printing.
Suitable for fault diagnosis of complex cable networks.
Choose Suggestions
① Select based on the type of fault:
Low resistance fault: Low voltage pulse reflectometer, insulation resistance tester.
High resistance fault: Pulse current method instrument, DC high-voltage flashover tester.
Unknown path: Cable path detector.
② Select based on cable type:
Low voltage cables: TDR、 Low voltage pulse reflectometer.
High voltage cables: pulse current method instrument, DC high-voltage flashover tester.
③ Select according to the usage scenario:
On site rapid detection: portable TDR, cable fault location system.
Laboratory or factory: intelligent cable fault tester, voltage tester.
The ZC-700A cable fault tester is a new generation portable cable fault tester designed and manufactured by our company based on user requirements and considering on-site use. It adheres to our consistent principles of high technology, high precision, and high quality, and elevates the level of cable testing to a new level. The cable fault tester consists of three main parts: flash testing, tracking, and positioning. The tester can be used to detect low resistance, high resistance, short circuit, open circuit, leakage and flashover faults of various cables, accurately detecting the location of fault points, cable length and cable burial path of underground cables. It has the characteristics of accurate testing, high level of intelligence, wide adaptability, stable performance, and lightweight portability. The instrument adopts a Chinese character system, high-definition display, and user-friendly interface.
Cable tracing and fault location are composed of a pathfinder, a locator, a T-probe, an A-frame, an earpiece, etc. This instrument is a specialized instrument for cable fault location testing, suitable for testing various cables with metal conductors (wire pairs, protective layers, shielding layers). Its main functions are to locate and test points of poor ground insulation, detect cable paths, and test cable burial depth.
Kvtester Electronics Technology Co.,Ltd. is a high-tech enterprise specializing in power testing, testing, research and development, production, and sales of testing equipment. It has been engaged in the electrical testing industry for many years, and its products are of high quality. We welcome customers to come and purchase. Service hotline: 0086-27-81778799, to learn more, visit the official website: www.kvtester.com
