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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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XHDD503E+ Cable Fault Locator 2026-02-09 In the operation and maintenance of power systems, communication lines, and various types of cables, quickly and accurately locating fault points is crucial for ensuring line safety and improving maintenance efficiency. To address this need, we are proud to introduce the XHDD503E+ cable fault locator, an intelligent positioning device featuring dual upgrades in signal processing and probe sensing capabilities, empowering maintenance personnel to easily handle various cable fault challenges. Why choose XHDD503E+? Cable faults are often difficult to detect and locate, and traditional methods rely on experience, are time-consuming, and prone to misjudgment. The XHDD503E+ utilizes the principle of acoustic-magnetic synchronization, combining vibration sensing and electromagnetic induction technology.  When a high-voltage pulse triggers a discharge at the fault point, it simultaneously collects acoustic, vibration, and electromagnetic signals. Through intelligent analysis and dual audio-visual output, it achieves precise localization of the fault point. Localization Principle: The fault point is located "directly above the cable, within the roughly estimated range," truly achieving a leap from "approximate range" to "precise location." Cable faults are often difficult to detect and locate, and traditional methods rely on experience, are time-consuming, and prone to misjudgment. The XHDD503E+ utilizes the principle of acoustic-magnetic synchronization, combining vibration sensing and electromagnetic induction technology.  When a high-voltage pulse triggers a discharge at the fault point, it simultaneously collects acoustic, vibration, and electromagnetic signals. Through intelligent analysis and dual audio-visual output, it achieves precise localization of the fault point. Localization Principle: The fault point is located "directly above the cable, within the roughly estimated range," truly achieving a leap from "approximate range" to "precise location." Overview of main technical parameters Filtering Method: Fifth-order cascaded filtering, supporting all-pass, band-pass, low-pass, and high-pass filters Detection Accuracy: Positioning ≤ 0.1m, step voltage ≤ 0.5m Sound Gain: 16 levels adjustable (0~112dB) Power Supply: 4 x 18650 battery cells, 3.7V/3200mAh Operating Temperature: -25℃ ~ 65℃ Total Weight: Approximately 8kg (including accessories)
Solving the challenge of high-voltage cable faults – the XHSC-60Q digital burn-through bridge. 2026-02-09 In the operation and maintenance of high-voltage cable systems, locating insulation faults has always been a technical challenge. Especially when dealing with complex cable systems with large cross-sections, long distances, GIS terminals, or cross-connections, traditional methods are often cumbersome, time-consuming, and even require equipment disassembly for testing, severely impacting maintenance efficiency and power supply reliability. Today, we introduce a smart fault location tool specifically designed for complex high-voltage cable systems – the XHSC-60Q digital burn-through bridge.  It integrates burn-through and intelligent bridge functions, achieving one-button operation, fully automatic diagnosis, and rapid location, helping you efficiently pre-locate cable insulation faults. Why choose XHSC-60Q? 1. Dual-Mode Intelligent Switching to Handle Various Faults Burn-through mode: Output voltage 0-60kV, maximum current 400mA, can quickly burn through high-resistance faults to low resistance, creating conditions for subsequent precise fault location. Bridge mode: Maximum test current 750mA, bipolar output voltage 0-4kV, no blind spots, especially suitable for fault detection in short cables and near-end faults. 2. Fully Automatic Intelligent Diagnosis, Simple and Safe Operation The device automatically identifies the fault type and intelligently guides the next operation. Automatically detects correct wiring and has protective grounding detection function to ensure safe operation. Data is automatically stored, and historical records can be accessed at any time for analysis and report generation. 3. Powerful Output, Adaptable to Complex High-Voltage Systems High output voltage and current, especially suitable for long-distance, large-cross-section high-voltage cable systems. Fault location can be quickly completed without removing GIS switches and short-circuit cross-connections, significantly reducing power outage time and labor costs. Parameters and features, a testament to its capabilities. Output Voltage (Burn-through): 0–60kV DC Maximum Output Current (Burn-through): 400mA Maximum Output Current (Bridge): 750mA Location Accuracy: ±(0.1%·L+1)m Test Range: 1–50000m Power Input: 100V-240V, 50/60Hz Protection Rating: IP54 Weight: 22kg (excluding accessories) Operating Temperature: -10℃ ~ +55℃ Thoughtful Design, Worry-free On-site Operation Portable Design: Trolley-style case with casters, lightweight and easy to move, suitable for on-site work. Digital Power Control: Stable output, fast response, supports wide voltage input, adapting to various on-site power environments. Sunlight-readable Screen: 320*240 dot matrix LCD screen, clearly visible even in strong sunlight.
Fault detection of 10kV cable intermediate joints 2026-01-21 In the intricate network of underground cables beneath the city, accurate fault location means faster restoration of power supply. Recently, we completed a 10kV cable fault detection project, where the fault was located at a hidden intermediate joint. End positions The starting point is at the distribution cabinet, and the ending point is at the substation. On-site situation The route is clear, following the drainage ditch along the edge of the road. Insulation resistance The three-phase resistance to ground is low. Using the instrument 1. XHGG502 Cable Fault Tester 2. XHMR-5kV Insulation Resistance Tester 3. XHHV535-4Z Rod-type High-Voltage Pulse Generator The three phases of the cable were tested using the 5kV range of the XHMR-5kV insulation resistance tester: the resistance between phase A and ground was approximately 1.2 MΩ, the resistance between phase B and ground was 0.5 MΩ, and the insulation of phase C was normal. Based on this, a fault was determined in phases A and B. We then used the low-voltage pulse method of the XHGG502 cable fault tester to test the cable. The test results showed that the total length of the cable was approximately 2700.2 meters. To determine the location of the cable fault, the waveform was acquired using the high-voltage flashover method of the XHGG502 cable fault tester, which indicated that the fault point was approximately 2000.5 meters from the testing end. Using the XHHV535-4Z high-voltage pulse generator, phase B was energized. Initially, the voltage was increased to 20kV without breakdown, but when the voltage reached 22kV, discharge occurred at the fault point. Because the cable was laid in a trench, the discharge sound could be heard at the manhole cover approximately 2000m away. After descending into the manhole for confirmation, the fault point was identified as a joint failure. Since the insulation of phase A was also low, high voltage was applied to phase A for further testing, and the same joint discharged again, indicating that the fault points of both phases were in the same location. In this test, waveform analysis using the high-voltage flashover method presented some difficulties. Interference was present at the site, requiring the identification of periodic discharge signals from the later part of the waveform. This reminds us that: Waveform analysis requires practical experience. On-site interference needs to be appropriately handled. Using multiple methods in combination can improve localization accuracy.
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