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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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Xi'an Xu&hui Helps Kenya Power Grid Overcome Cable Failures 2025-05-20 From Xi'an to Kenya, recently, the technical team of Xi'an Xu&hui Company traveled 8,000 kilometers to the front line of the Kenyan project, bringing "breakthrough" practical training on cable fault detection to local power engineers, using Chinese technology to solve the problems of power operation and maintenance in Africa. Indoor Training Teaching 66kV Cable Fault Detection Training Site 11kV Cable Fault Detection Training Site "Where is the fault point?" - This is the most troublesome problem that Kenyan engineers have faced when they encounter underground cable failures. Traditional detection methods are time-consuming and have large errors, and often require digging several kilometers of cable trenches for investigation. The Xuzhihui team broke through with the "three-step method":Accurate judgment: Through high-frequency current coupling technology, quickly lock the faulty cable phase;Smart viewing: Use adaptive filtering equipment to eliminate soil clutter interference and clearly capture the fault waveform;Final confirmation: Combine the step voltage method with the acoustic magnetic synchronous locator to compress the fault point error to within 0.5 meters. Precision detection configuration Technical adaptation in tropical climate: Why the Chinese solution can win Kenya has high temperature and heavy rain, and the soil is highly corrosive, which poses a great threat to the insulation layer of buried cables. Xuzhihui's product advantages are highlighted: Equipment advantages: The detection instrument has a moisture-proof shell that adapts to high-intensity field operations; Strong functionality: It has tropical soil resistivity compensation function to reduce environmental data deviation; Maintenance secrets: Teaching localized operation and maintenance skills such as "pre-detection of micro-damage of the insulation layer before the rainy season". This training is not only the transfer of equipment and methods, but also the implementation of China's power testing standards overseas: the establishment of Kenya's first underground cable fault database to achieve traceability of historical faults; the construction of a remote diagnosis platform to achieve 24-hour technical linkage between the Chinese and Kenyan teams."We are transforming from students to partners." A representative of Kenya Power Company said that in the future, it is planned to incorporate Xuzhihui's solution into the operation and maintenance standard system. Let every meter of cable "speak" Xi'an Xu&hui said: "Our goal is not only to solve faults with products, but also to transform cable operation and maintenance from "passive repair" to "active prevention" through intelligent detection." With the continuous integration of technologies such as AI diagnosis and Internet of Things monitoring, this "cable revolution" that began in Kenya may light up the future of power grids in more "Belt and Road" countries.
What is The Use of Ground Wire? Xi'an Xu&hui Will Show You How to Use Ground Wire 2025-05-28 The ground wire is also called the ground wire or lightning arrester. It is divided into working ground and safety ground. The popular explanation is that it is a wire that introduces current into the earth. It can reduce the voltage to zero volts. It is a form of electrical protection that can ensure the safety of personnel and equipment. Article 3 of my country's current standard GB2681 stipulates that phase A is yellow, phase B is green, phase C is red, and the neutral line is light blue. The ground wire is yellow and green, and its symbol is E (Earth). In the power system, the grounding wire is an important tool to ensure the safety of workers when power outage equipment and lines are accidentally overvoltage; according to regulations, the grounding wire is made of bare copper soft wire with a size of more than 25mm2.Electrical equipment: The grounding wire is the lead-out line for unsafe charges or leakage currents connected to the outer shell of electrical equipment and other parts. When testing the power cable fault during the flashover test, failure to connect the ground wire or connecting the wrong ground wire may cause equipment damage or even personal injury accidents.This is also the case in people's daily lives. For example, if the metal shell of a household rice cooker is grounded, when a single-phase grounding fault occurs, both the RCD (residual current device) and the main switch can trip for protection; if there is no grounding, when a single-phase grounding fault occurs, neither the RCD (residual current device) nor the main switch will trip for protection, and personal injury accidents may occur.Whether it is the grounding of household appliances or electrical test projects including cable fault detection tests, special attention should be paid to the grounding wire problem. Once vigilance is relaxed, accidents may occur.Different grounding types and circuits with different functions have different grounding methods. Common grounding methods in power equipment include safety grounding, lightning protection grounding, working grounding, signal, analog grounding, digital grounding, and power grounding. Cable fault detection generally uses safe grounding, that is, the high-voltage equipment casing is connected to the ground. It has two functions. One is to prevent the accumulation of charge in the casing, generate electrostatic discharge, and endanger the safety of equipment and personnel; the other is that when the insulation of the equipment is damaged, the casing is energized and the power must be cut off immediately for protection.Therefore, before involving electrical test projects, the grounding wire should be checked (whether the soft copper wire is broken, whether the screw joint is loose, and whether the hook elasticity is normal, etc.). Secondly, the grounding wire should be tested before hanging, and the grounding wire should not be in contact with the body when hanging; in addition, it is necessary to pay attention to the selection of grounding wires of corresponding specifications for different voltage levels. Under normal circumstances, the grounding wire should be taken care of (do not twist it during use, coil the soft copper wire when not in use, and place it neatly after disassembly), and pay attention to the cleaning of the grounding wire.(RCD is the English abbreviation for residual current device)
350m direct buried cable suddenly broke down! How to repair it? 2025-05-12 In the early morning of April 8, 2025, our company received an urgent repair report from a water plant: a sudden failure of the power supply cable in the plant caused the equipment to stop operating. The repair team quickly arrived at the scene with a full set of professional equipment and successfully located the location after a hard fight. Witness the entire repair process in this race against time. 一、Sudden failure characteristics Model: YJV 3120+295 direct buried cable (unarmored) Symptoms: A/B phase and N line short circuit to ground, C phase insulation deterioration Challenges: 350m direct buried section + complex factory environment + no armor interference 二、Four-step positioning method to solve the problem   1️⃣ Initial diagnosis: 502 cable fault tester low voltage pulse method quickly locked and measured the total length of 348.4 meters (with an error of only 0.5% from the file) and found abnormal waveforms at 55.7 meters of A/B/N phases. The fault point was roughly measured at about 55 meters and initially determined to be a multi-phase disconnection grounding fault.   2️⃣ Path tracking: 507C pipeline instrument accurately guides along the distribution room → factory wall → lawn to complete the path restoration, confirm the direct burial depth and direction, and eliminate interference from other pipelines. 507C pipeline instrument step voltage method Detects abnormal potential difference in the 50-meter area and locks the 1-meter range through gradient changes. It is especially suitable for low-resistance faults without armor. 3️⃣ Cross-validation: 503E cable fault location device Acoustic-magnetic synchronization method double confirmation High voltage flash produces identifiable discharge signal 503E cable location device captures obvious shock wave Final location error
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