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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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Popular Science Lesson: Classification of Power Cable Joints by Application 2025-11-24 In power transmission and distribution lines, a complete power cable line consists of two main parts: the cable body and the cable joints. Cable joints are a crucial component of power cable lines. During cable installation, laying, and operation, the failure rate of cable joints is often much higher than that of the cable body. Therefore, analyzing and understanding the condition of cable joints is essential. According to their purpose, cable joints are generally classified into two types: terminal joints and intermediate joints. Terminal joints can be further divided into the following three types: (1) Indoor terminal joints. Used indoors to connect the cable to the power supply equipment. Their appearance is shown in Figure (a). (2) Outdoor terminal joints. Used outdoors to connect the cable to the power supply equipment. Their appearance is shown in Figure (b). (3) Equipment terminal joints. Used when connecting the cable to electrical equipment, with the high-voltage conductive metal in a fully insulated and enclosed state. There are three main types of intermediate joints: (1) Butt Joint: Two identical or different cables are directly butted together, as shown in Figure (a). Schematic diagram of cable intermediate joints: (a) Butt Joint; (b) T-Joint; (c) X-Joint (2) Branch Joint: Connecting a branch cable at a point on the main cable is called a T-Joint. When two branch cables simultaneously branch off at a point on the main cable, it is called an X-Joint. T-Joints and X-Joints are shown in Figures (b) and (c). (3) Transition Joint: The connection between two cables with different insulation types (such as cross-linked polyethylene cable and oil-impregnated paper-insulated cable).
Popular Science Lesson: Cross-linked Polyethylene Insulated Cables (XLPE Insulated Cables) 2025-11-24 Cross-linked polyethylene insulated cables (XLPE cables) are widely used not only in low-voltage power supply systems below 6kV, but also in transmission and distribution line systems with voltage levels from 6kV to 500kV. The structure of XLPE cables below 6kV is basically the same as that of PVC low-voltage cables. (See diagram) Single-core cross-linked polyethylene cable structure diagram (a) Single-core cross-linked polyethylene insulated cable; (b) Single-core cross-linked polyethylene insulated steel tape armored cable; (c) Single-core cross-linked polyethylene insulated steel wire armored cable; (d) Outline diagram: 1, 8, 17 - Conductor; 2, 9, 18 - Conductor shield; 3, 10, 19 - Insulation; 4, 11, 20 - Insulation shield; 5, 12, 21 - Copper tape shield; 6, 13, 22 - Wrapping tape; 7, 16, 26 - Outer sheath; 14, 23 - Inner sheath; 15, 24 - Steel tape armor; 25 - Copper wire Three-core cross-linked polyethylene cable structure diagram: (a) Unarmored cable;(b) Steel tape armored cable;(c) Steel wire armored cable;(d) Outline diagram:1, 9, 19 - Conductor;2, 10, 20 - Conductor shield;3, 11, 21 - Insulation;4, 12, 22 - Insulation shield;5, 13, 23 - Copper tape shield;6, 14, 24 - Filler;7, 15, 25 - Wrapping tape;8, 18, 28 - Outer sheath;16, 26 - Inner sheath;17, 27 - Steel tape/steel wire armor Compared to other low-voltage plastic cables, the most significant difference in structure between 6~35kV cross-linked polyethylene (XLPE) cables is the addition of inner and outer semi-conductive shielding layers and a copper tape (wire) metal shielding layer. Both inner and outer semi-conductive shielding layers use carbon black-added XLPE material, typically 1~2mm thick, with a volume resistivity of approximately 10⁴ Ω·cm. The copper tape (wire) forms a circuit for the cable's ground fault current and provides a stable ground potential. Therefore, the ground wire of XLPE cables is led out via copper tape (wire) rather than armored steel tape, which is crucial. Cables with a conductor cross-sectional area of ​​240m² or less generally use a copper tape shielding structure; while cables with a conductor cross-sectional area greater than 240m² use a copper wire shielding structure. Representative models of 6~35kV XLPE cables include aluminum core YJLV or YJLY types, and copper core YJV or YJY types. The figure shows two typical structures of cross-linked polyethylene cables with voltage levels of 66kV and above. In addition to YJLY/V type and YJV/Y type, the representative models also include YJQ, YJLQ type, YJLW, and YJLLW type. Schematic diagram of 66~220kV cross-linked polyethylene cable structure (I) (a) Cross-sectional view; (b) Outer view 1- Conductor; 2- Inner shield; 3- Insulation; 4- Outer shield; 5- Copper wire shield; 6- Longitudinal water-blocking layer; 7- Comprehensive waterproof layer; 8- Outer sheath Schematic diagram of 66~220kV cross-linked polyethylene cable structure (II) (a) Cross-sectional view; (b) Outer shape view 1- Conductor; 2- Inner shield; 3- Insulation; 4- Outer shield; 5- Longitudinal water-blocking layer; 6- Non-magnetic metal sheath; 7- Outer sheath Compared to cables of 35kV and below, cables of 66kV and above do not use steel tape for their armor layer. Instead, they employ non-magnetic metals such as corrugated aluminum (copper, aluminum alloy, stainless steel) sheaths, which also provide excellent waterproofing. The outer sheath of the cable is generally made of PVC material, with a layer of conductive graphite coated on top. This graphite layer serves as the ground terminal, facilitating withstand voltage tests on the outer sheath.
XZH invites you to the 2025 Shanghai Power Storage Exhibition (N5E03) 2025-11-21 Xi'an Xuzhihui always prioritizes product quality, with each piece of equipment undergoing rigorous and repeated testing. The robust and aesthetically pleasing design, coupled with a user-friendly interface, makes power testing more efficient and convenient. These high-quality devices have become invaluable assistants for power testing personnel and a reliable choice for quickly troubleshooting power equipment and ensuring stable power supply. At the exhibition, Xuzhihui's professional technical team provided visitors with detailed product explanations and technical consultations. The company adheres to the business philosophy of "excellent quality, attentive service, customer first, and integrity-based," committed to providing every customer with the best service experience. In addition to showcasing advanced products, the company also shared numerous field application cases and solutions with visitors, helping users address various challenges encountered in their work and providing economical, practical, fast, and effective testing solutions.
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