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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 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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Pinpointing the Location by Sound: Rebar Punctures 35kV Cable 2026-04-02 Insulation Testing: Using the XHMR-5000V Insulation Resistance Tester, the insulation of Phase C was measured at 0.08 MΩ, with a residual voltage of 468 V. For Phases A and B, the insulation values ​​reached the GΩ range within 15 seconds, which was deemed normal. Preliminary Conclusion: Phase C exhibits a main insulation fault. Total Length Verification: First, using the XHGG502 Cable Fault Tester, the total length of the cable was measured—via the low-voltage pulse method—to be approximately 6400.9 meters; this figure is essentially consistent with the cable length known at the site. The High-Voltage Flashover Method, utilizing the XHGG502 Cable Fault Tester, was employed to determine the fault distance on Phase C. Using an XHYB-5/50 Test Transformer in conjunction with an XHCC-6/40 Pulse Energy Storage Capacitor, the fault point broke down as the voltage rose to 14 kV, yielding a standard flashover waveform. Based on waveform analysis, the fault point is located approximately 1694.5 meters from the testing terminal. Based on the technical drawings, the on-site personnel identified the cable route in the vicinity of the 1694.5-meter mark. To amplify the discharge sound and facilitate precise pinpointing, the technicians raised the voltage to approximately 23 kV; they then proceeded along the route using an XHDD503E cable fault pinpointing device to conduct simultaneous acoustic-magnetic tracing. The discharge sound was exceptionally loud—clearly audible and easily distinguishable in the open air. Following the sound, the team quickly pinpointed the exact location of the fault, completing the localization process with high efficiency and accuracy. Excavation has confirmed that the fault location lies beneath a newly constructed drainage ditch situated directly above the cable. During construction, while workers were erecting steel reinforcement formwork, a steel bar pierced directly into the cable—penetrating its insulation layer—resulting in a phase-to-ground fault on Phase C. The results of the excavation align perfectly with the diagnostic localization, establishing the cause of the fault clearly and unequivocally.
Blind Testing of a Live 110kV Cable Route 2026-03-30 .gtr-container-x7y3z9 { font-family: Verdana, Helvetica, "Times New Roman", Arial, sans-serif; color: #333; line-height: 1.6; padding: 16px; max-width: 100%; box-sizing: border-box; } .gtr-container-x7y3z9 p { font-size: 14px; margin-bottom: 1em; text-align: left !important; word-break: normal; overflow-wrap: normal; } .gtr-container-x7y3z9 p:last-child { margin-bottom: 0; } .gtr-container-x7y3z9 img { display: block; /* Ensures image doesn't have extra space below it due to inline-block default */ max-width: 100%; /* Ensures image doesn't overflow its container on smaller screens */ height: auto; /* Maintains aspect ratio */ margin: 16px auto; /* Centers the image and provides vertical spacing */ } .gtr-container-x7y3z9__step-header { font-size: 18px; font-weight: bold; color: #01EDC9; margin-top: 2em; margin-bottom: 1em; text-align: left; } .gtr-container-x7y3z9__section { margin-bottom: 24px; } @media (min-width: 768px) { .gtr-container-x7y3z9 { padding: 24px; max-width: 960px; margin: 0 auto; } .gtr-container-x7y3z9 p { margin-bottom: 1.2em; } .gtr-container-x7y3z9 img { margin: 24px auto; } .gtr-container-x7y3z9__step-header { margin-top: 3em; margin-bottom: 1.2em; } } On March 23, we received a mission to trace the route of a power cable: A new transmission tower was being constructed outside the substation, necessitating the installation of a new 110 kV cable route leading into the facility. Prior to excavation, however, it was imperative to determine whether any existing cables lay within the designated digging zone. One end of the existing cable terminated at a GIS switch inside the substation, while the other connected to a 110 kV tower located outside. Unfortunately, the tower's nameplate was illegible, making it impossible to identify which specific switch the cable corresponded to. The cable itself was directly buried in the ground, spanning a distance of approximately 300 meters, and remained energized throughout the entire operation. Furthermore, the cable platform on the tower was situated at a considerable height, rendering standard signal coupling methods—typically used for such tasks—impractical. The critical challenge was this: regarding the area slated for excavation, no one knew whether any cables lay beneath the surface—let alone their precise routing. It was, in every sense of the word, a true "blind test." Faced with live-line operating conditions and the inability to establish a direct connection, we selected the XHGX507C pipeline locator. Inductive detection thus became the primary method employed for this mission. 1. Two-Person Coordination and Parallel Movement This constitutes the most critical step in the entire detection process. Two-Person Team: Utilizing the XHGX507C Pipeline Locator, one operator holds the transmitter while the other holds the receiver; maintaining a distance of approximately 10 to 20 meters between them, they move forward in parallel. Directional Control: The orientation of the transmitter is aligned with the estimated direction of the pipeline, while the receiver's antenna is positioned perpendicular to the probable direction of the underground utility line. Dynamic Tracking: As they move, the receiver operator continuously shifts the receiver back and forth to monitor signal fluctuations on the display screen in real time. 2. Signal Interpretation and Peak Localization When a cable is present beneath the device, the receiver's signal strength increases significantly; the energy bar on the screen rises, accompanied by directional arrow prompts (left and right)—indicating that the receiver is approaching the position directly above the cable. Continue to fine-tune the position until the receiver is situated precisely above the cable; at this point, the signal reaches its peak intensity. We then mark this specific spot on the ground. If the receiver drifts away from the cable, the energy bar diminishes, and a single arrow appears on the screen, clearly indicating the direction in which the cable lies. Proceeding in this manner—using two visible cable points as a starting reference—we systematically extend our detection outward across the excavation zone. By repeating the aforementioned procedure every ten to fifteen meters, the consecutively marked points form a continuous line, thereby gradually revealing the precise routing of the cable. 3. Path Confirmation: From Points to a Line Through the collection of a series of signal points, we have successfully mapped out the complete trajectory of the cable as it extends outward from the known reference points in both directions. The distribution of cables within the excavation zone has now been clearly defined: it is immediately apparent which areas contain cables and which areas do not. This result serves as a direct guide for formulating the safety protocols required for the subsequent cable-laying operations associated with the construction of the new transmission tower.
Deeply Rooted in Power Testing: Innovating to Empower High-Quality Industry Development 2026-03-17 /* Unique class suffix generated: 6m7n8o */ .gtr-container-6m7n8o { font-family: Verdana, Helvetica, "Times New Roman", Arial, sans-serif; color: #333; line-height: 1.6; padding-top: 15px; padding-bottom: 15px; box-sizing: border-box; } .gtr-container-6m7n8o .gtr-main-content-6m7n8o { overflow-x: auto; -webkit-overflow-scrolling: touch; padding: 0 15px; } .gtr-container-6m7n8o p { font-size: 14px; margin-bottom: 1em; text-align: left !important; word-break: normal; overflow-wrap: normal; } .gtr-container-6m7n8o .gtr-image-paragraph-6m7n8o { text-align: center !important; margin-bottom: 1.5em; } .gtr-container-6m7n8o img { vertical-align: middle; } .gtr-container-6m7n8o .gtr-highlight-6m7n8o { color: #01EDC9; font-weight: bold; font-size: 14px; } @media (min-width: 768px) { .gtr-container-6m7n8o { max-width: 960px; margin: 20px auto; padding-top: 30px; padding-bottom: 30px; } .gtr-container-6m7n8o .gtr-main-content-6m7n8o { padding: 0 30px; } .gtr-container-6m7n8o p { margin-bottom: 1.2em; } .gtr-container-6m7n8o .gtr-image-paragraph-6m7n8o { margin-bottom: 2em; } } XZH TEST—a key pillar among power equipment manufacturers in Xi'an—has dedicated itself for years to the R&D, manufacturing, and service of power testing equipment. Leveraging its profound scientific research capabilities, high-quality product portfolio, and professional service expertise, the company has distinguished itself amidst the wave of intelligent transformation sweeping through the power industry. It has emerged as a trusted partner for domestic and international stakeholders in the power sector, harnessing technological innovation to inject powerful momentum into the industry's high-quality development. As a high-tech enterprise integrating R&D, manufacturing, sales, and service, XZH TEST leverages the technical resources of renowned institutions—such as Xidian University and Xi'an Jiaotong University—as well as research institutes like the Xi'an High Voltage Apparatus Research Institute and the Wuhan High Voltage Research Institute. Focusing on the core testing requirements of the power industry, the company specializes in the R&D and manufacturing of high-voltage testing equipment and precision instrumentation. The company's core product portfolio encompasses a diverse range of high-quality power testing equipment series, including cable fault locators, high-voltage pulse generators, partial discharge detectors, and ground resistance testers. These products are widely utilized across every segment of the power industry—spanning power generation, transmission, distribution, and consumption—as well as in research institutions and among power equipment manufacturers, enabling the provision of comprehensive, integrated power testing solutions. Technological innovation constitutes the core competence of XZH TEST and serves as the primary driving force behind the company's sustainable growth. The company has established a dedicated R&D team that remains consistently focused on addressing critical technical pain points within the industry, continuously driving the iterative upgrading of its product portfolio. Notably, the company's independently developed XHGG series of cable fault testers—which integrate industrial-grade integrated circuits with modern computer technology—enable rapid flash testing and precise localization of cable faults. Furthermore, the XHDD503 series of acoustic-magnetic synchronous pinpointing instruments leverages core technologies such as acoustic-magnetic time-difference localization and noise reduction to efficiently resolve industry-wide challenges regarding the inaccurate localization and inefficient troubleshooting of buried cable faults. Additionally, the XHHV series of high-voltage pulse generators—which consolidate functions such as DC high-voltage sources and energy-storage capacitors into a single unit—feature a compact design and user-friendly operation; these devices have successfully replaced traditional, heavy-duty testing equipment, thereby significantly enhancing the efficiency of power system testing operations. Concurrently, XZH TEST has entered into a strategic partnership with the 29th Metrology and Testing Center of the Machinery Industry. This collaboration facilitates comprehensive third-party inspection and calibration services for power testing equipment, ensuring that every product adheres to rigorous industry standards and providing users with reliable assurance regarding the accuracy and integrity of their testing operations.
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