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China Xi'an Xu&Hui Electromechanical Technology Co., Ltd.
about us
Xi'an Xu&Hui Electromechanical Technology Co., Ltd.
XI'AN XU&HUI ELECTROMECHANICAL TECHNOLOGY CO.,LTD was established in 2013 with a registered capital of 11 million yuan and is located in Xi'an City, has a 3,000 square meter four-story independent scientific research and production plant. XZH TEST is a professional cable fault detection equipment manufacturer. We are a young team. Our development philosophy is humanized management, intelligent cloud-based products, and internationalized operations. Our development mission is to make electrical equipment free from undetectable failures. Since its inception in 2013, our company has grown to become one of the largest manufacturer of underground cable fault detection equipment in China. An ISO 9001 and CE certified company, we produces a broad range of testing equipment.
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A comprehensive review of 4 cable laying methods: How to accurately locate common faults? 2025-04-27 In the field of cable laying and fault detection, common laying methods include direct burial, pipe laying, trench or tunnel laying, and bracket or bridge laying. Each of these methods has its own characteristics and challenges when finding cable faults.     Direct burial method: It is the basic cable laying method, requiring a burial depth of about 800mm, but due to various reasons, some cables may be buried deeper, such as 3-4 meters, which increases the difficulty of fault detection, mainly reflected in the accurate positioning of the cable. Direct burial method through pipe: It is used when the cable passes through roads, railways or buildings. The cable needs to pass through iron pipes, cement pipes or PVC pipes. Although this method protects the cable, the fault location is more complicated, especially at the cable pipe, which requires special techniques for accurate positioning.     Trench or tunnel laying method: It makes cable fault finding relatively easy, and its main advantage lies in the accurate positioning of cable faults. This method is generally used in cases where the process is complex and the environmental requirements are high, making the cable easier to maintain and detect. Bracket or bridge laying method: Similar to trench or tunnel laying, when a cable fails, coarse measurement technology is particularly important to quickly find the approximate location of the fault. In addition, this method is more convenient for maintenance and detection because the cable is exposed indoors or on a specific path.     In general, various laying methods have their own advantages and disadvantages in cable fault detection, and it is crucial to choose the right laying method and detection technology. Complex lines and burial depths directly affect the difficulty of fault location, and professional fault detection equipment and rich experience of technicians are especially required. Xi'an Xuzhihui Electromechanical Technology Co., Ltd. was established in 2013 with a registered capital of 11 million yuan. Relying on many scientific research institutes such as Xidian University, Xi'an Jiaotong University, Xi'an Institute of High Voltage, and Wuhan Institute of High Voltage, it mainly provides advanced high-voltage test equipment and detection instruments for power generation, substation, power supply, power consumption departments, scientific research institutions and power equipment-related production and service enterprises in the power system. The company is a high-tech enterprise integrating scientific research, production, sales, training and services.  
Operation flow of DC high voltage generator 2025-04-21 Preparation work before use First check the integrity, there should be no open circuit and short circuit and the equipment should not be broken; secondly, place the voltage multiplier in a suitable position, connect the test product between the high-voltage output terminal and the ground terminal, and prohibit the grounding wires from being connected in series.   Measurement method during use: general measurement, connect the wires, hang or connect the test product wiring, read the corona, stray current and total current after the test voltage is raised, and calculate the leakage current of the test product; in addition, when the grounding terminal of the test product such as zinc oxide is separated, the leakage current can also be measured by connecting an ammeter in series on the ground potential side of the test product.   After use, turn off the power switch in time, the panel indicator light goes out, and the voltage regulating potentiometer returns to zero. After one minute, the low-voltage capacitor in the standby is fully discharged before the power switch is allowed to be turned on again.  
Xi'an Xu&hui technicians went to provide on-site guidance to Malaysian customers 2025-04-14 XHGG502 Cable Fault Tester: Eight-pulse method subverts high-resistance detection   Equipped with an industrial-grade 12.1-inch touch screen and intelligent algorithm, XHGG502 uses the "eight-pulse method" technology to simplify the high-resistance fault waveform into a low-voltage short-circuit waveform, achieving one-key distance measurement (error ≤±0.5%). It supports 68km ultra-long distance measurement and 400MHz high-speed sampling. The built-in battery meets the requirements of power supply-free environment operation and is suitable for 6kV to 66kV full-voltage grade cables. It is especially suitable for long-distance scenarios such as transnational power grids and offshore energy. It is pre-installed with a multi-language system and GPS track recording function, making it the core equipment of a power grid transformation project in a Southeast Asian country, and improving the troubleshooting efficiency by 70%. XHHV535-4TS high-voltage pulse generator: 2048J energy output, double upgrade of safety and performance   The device integrates 32kV high-voltage output, three-speed capacitance adjustment and automatic discharge protection. A single machine can complete impulse discharge and withstand voltage test, and is suitable for flashover high-resistance fault detection. The cart design, DC withstand voltage function and multi-country voltage compatibility (AC 220V±10%) enable it to perform well in harsh scenarios such as African mining areas and South American oil bases. Overseas users feedback: "Its visual pointer meter and automatic protection mechanism greatly reduce the risk of high-voltage operations." XHDD503C cable fault locator: acoustic and magnetic synchronous locking millimeter-level error   As the world's first acoustic and magnetic synchronous locator, XHDD503C integrates vibration pickup and electromagnetic induction technology, triggers the discharge of the fault point through high-voltage pulses, accurately captures sound waves and magnetic field signals, and intelligently calculates the time difference to achieve millimeter-level positioning of the fault point (accuracy ≤ 0.1m). Its 5-inch high-brightness touch screen, IP65 waterproof design and multi-level noise reduction function can adapt to complex environments such as underground pipe networks, high temperature and high humidity, and support a variety of cable types around the world (including power, communication cables and high-resistance faults), in line with the international DL/T 849.2-2019 standard, and is called "GPS for underground cables" by overseas engineers.    
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