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China Xi'an Xu&Hui Electromechanical Technology Co., Ltd.
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Xi'an Xu&Hui Electromechanical Technology Co., Ltd.
Xi'an Xu&Hui Electromechanical Technology Co., Ltd. /Xian XZH Electric Power Technology Co., Ltd. has found in 2013, located in Xi'an, China. which is a highly experienced team dedicated to developing electrical measurement instrument, the product line covers a wide range of devices for testing various electrical area, such as underground cable fault locating system, power transformer test, AC/DC Hipot test, Insulation resistance test and so on. With rich measurement experiences of innovation combining and advanced technology to provide the most reliable electrical measurement. The design development production and Inspection is performed at the ISO 9001 and CE which gurantee a consistency of high quality products. XZH TEST masters a variety of technologies as well as extended service and support to deliver the highest value to our customers. We sincerely hold the tenet of "quality first, customers supreme, honor commitment trust worthy".Stays commitment R&D about electric power detection equipment and electric power automation, since its foundation, the company keeps living up to the belief of: "Create high-quality brand, casting first-class enterprise image". Also, we make the "steady development, the best quality "as the core concept of the enterprise. Our goal is to provide our customers with reliable test and measurement equipment that more safe and easy to use, we make measurement easier! Xi'an Xu & Hui Electromechanical Technology Co., Ltd expect to strengthen the relationship with world-wide cooperators, and warm-heartedly welcoming business partners to visit our factory for developing the OEM & ODM win-win Cooperation. Our Team Factory scene Training is a core course for all the members and we will organize various trainings to help us to improve our abilities and Let us find the beauty of life. We treasure the time we are learning and studying together. Services We have the ability to innovate new products and technologies. We can provide complete system solutions for your project. We provide online and offline practical and theoretical training. We provide instrument repair and calibration. Certification
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Intelligent online monitoring system helps accurately locate cable faults 2025-09-22 Precise cable fault location devices are a significant technological innovation in today's power industry. With the increasing importance of power supply, cable faults can cause inconvenience in daily life and work, and even pose safety risks. Traditional cable fault detection methods are often time-consuming and labor-intensive, and may not always pinpoint the fault point. However, with the advent of intelligent online monitoring systems, locating cable faults has become more accurate and efficient. In this information age, intelligent online monitoring systems have become an essential tool for the power industry. Utilizing advanced sensing technology and data analysis algorithms, these systems monitor cable operating conditions in real time and respond quickly to faults. Compared to traditional manual inspections, intelligent online monitoring systems not only save labor costs but also prevent potential failures, ensuring stable power supply. Precisely locating cable faults is crucial for the power industry. Failure to locate the problem promptly can lead to widespread power outages, causing unnecessary trouble for users. With precise cable fault location devices, power companies can quickly locate the fault point and swiftly repair the problem, minimizing outages and improving the user experience. The emergence of intelligent online monitoring systems has not only improved the operational efficiency of the power industry but also enhanced the reliability of power supply for society as a whole. By adopting this advanced technology, power companies can better respond to emergencies and ensure the stability and security of power supply. In the future, as technology advances, precise cable fault location devices will play an even more important role in the power industry. In this challenging era, intelligent online monitoring systems, which help accurately locate cable faults, have become an essential path for the development of the power industry. Only by continuously introducing advanced technologies and improving the accuracy of monitoring systems and fault location capabilities can we better ensure the reliability and stability of power supply.
What are four practical methods for detecting cable fault points? 2025-09-22 As a vital carrier of power and communications, cables play a crucial role in various projects. However, due to long-term use, environmental influences, or improper construction, cables often experience various faults, such as short circuits and breaks. To promptly restore cable operation, detecting cable fault points is crucial. The following are four commonly used methods for detecting cable fault points: 1. Bridge Method The bridge method is a classic cable fault detection method. Based on the principle of bridge balance, it determines the fault location by measuring the resistance or reactance of the two arms of the bridge. While the bridge method is suitable for detecting low-resistance faults and is simple to operate, it has relatively low accuracy and is less effective for detecting high-resistance faults and flashover faults. 2. Low-Voltage Pulse Echometry The low-voltage pulse echometry method utilizes the principle of electromagnetic wave reflection at the fault point. A low-voltage pulse signal is transmitted into the cable and the distance to the fault point is determined by measuring the time difference between the reflected and transmitted waves. This method is suitable for detecting low-resistance faults such as short circuits and breaks, and offers the advantages of ease of operation and high accuracy. 3. High-Voltage Flashover Method The high-voltage flashover method is primarily used to detect high-resistance faults. By applying a high voltage to the faulty phase of the cable, a flashover discharge occurs at the fault point, creating a momentary short circuit. The fault location is then determined by measuring the discharge current waveform. While the high-voltage flashover method can detect high-resistance faults, it is relatively dangerous and requires specialized skills and protective equipment. 4. Acoustic Detection Method The acoustic detection method uses an acoustic sensor to detect the acoustic signal generated by the discharge at the cable fault point. The propagation speed and time of the sound are used to determine the fault location. This method is applicable to various types of cable faults, especially those that are difficult to detect using electrical methods. While the acoustic detection method offers the advantages of accurate location and flexible operation, it requires favorable external environmental conditions, such as a relatively quiet location and suitable weather conditions.
Briefly on the Difficulties of Cable Fault Location 2025-09-22 Due to the variability of power cable installation and use environments, coupled with the introduction of new materials for various cables and accessories, on-site fault location for power cables is becoming increasingly difficult. The difficulty of on-site cable fault location is particularly evident in locating faults in directly buried power cable lines. While there are currently extensive technical literature and advanced fault detectors for high-resistance faults in power cable lines, on-site use of professional cable fault locators can sometimes encounter difficult and challenging faults that are difficult to locate. For example, localized creepage and flashover faults on the insulation surfaces of medium-voltage cross-linked power cable terminals and intermediate connectors, as well as metallic short-circuit faults, are often difficult or inadequate to pinpoint using professional cable fault locators. For common cable faults, commercially available cable fault locators can typically locate the fault within minutes or hours. However, for complex and challenging faults, repeated testing with multiple cable fault detectors with different functions may be necessary, with each test taking turns to verify the location and location. These fault detectors primarily include various cable fault detectors designed and developed based on the bridge and waveform methods. This method can take several days or even longer to locate the fault. With luck, the fault location can be pinpointed, but with bad luck, it can remain undetermined. During winter, when the ground freezes, the actual fault location and troubleshooting of direct-buried cables can be quite challenging. First, the cable fault location instrument must be highly accurate. Secondly, personnel with a thorough understanding of the cable's actual routing are essential. Although some cable fault detection instruments now include cable path testers, the cooperation of on-site personnel with a general understanding of the cable's routing is essential for improved location accuracy. The actual cable fault handling process often relies 30% on human effort and 70% on machine effort. Currently, there are numerous manufacturers and a wide variety of cable fault detection instruments on the market, but none of them can actually locate all cable faults. In practice, these instruments are often only effective for locating one or a few fault types, leaving some unresolved. Today's power users are eager to invest heavily in a versatile cable fault detector with comprehensive functions and high positioning accuracy (including coarse and fine positioning) to quickly and effectively resolve all practical cable faults. However, this is difficult to find. A wide variety of cable fault detectors are constantly being introduced to the market. However, in actual field inspections, some technical difficulties cannot be located using cable fault detectors. I believe this is mainly due to two factors: First, the continuous development and upgrading of various insulation, filling, and wrapping materials used in cables and their accessories has led to a constant change in cable fault types; second, the limited market demand for cable fault detectors and the scarcity of relevant R&D personnel have hindered the development of portable, high-precision, intelligent, and multifunctional cable fault detectors. I believe that with the advent of the smart grid era and the rapid advancement of cable fault detection technology, locating cable faults will become a very simple and easy task.
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