Xi'an Xu&Hui Electromechanical Technology Co., Ltd. /Xian XZH Electric Power Technology Co., Ltd. foi fundada em 2013, localizada em Xi'an, na China, que é uma equipe altamente experiente dedicada ao desenvolvimento de instrumentos de medição elétricos,A linha de produtos abrange uma ampla gama de dispositivos para testes de várias áreas elétricas, tais como sistema de localização de falhas de cabos subterrâneos, teste de transformador de potência, teste AC/DC Hipot, teste de resistência ao isolamento e assim por diante.Com experiências de medição ricas de inovação combinando e tecnologia avançada para fornecer a medição elétrica mais confiável. O desenvolvimento do projeto, a produção e a inspecção são realizados em conformidade com a norma ISO 9001 e CE, que garantem a consistência de produtos de alta qualidade.A XZH TEST domina uma variedade de tecnologias, bem como um serviço e suporte estendidos para oferecer o maior valor aos nossos clientes. Mantemos sinceramente o princípio de "qualidade em primeiro lugar, os clientes supremo, compromisso honra confiança digna".Stains compromisso R & D sobre equipamentos de detecção de energia elétrica e automação de energia elétrica,Desde a sua fundação, a empresa continua a viver à altura da crença de: "Criar uma marca de alta qualidade, lançando imagem de empresa de primeira classe".A melhor qualidade "como conceito central da empresa. Nosso objetivo é fornecer aos nossos clientes equipamentos de teste e medição confiáveis que sejam mais seguros e fáceis de usar, tornando a medição mais fácil! Xi'an Xu & Hui Electromechanical Technology Co., Ltd. esperam fortalecer a relação com os colaboradores em todo o mundo,e bem-vindos aos parceiros de negócios para visitar a nossa fábrica para desenvolver a OEM & ODM Win-Win Cooperation. A nossa equipa Cena da fábrica O treinamento é um curso fundamental para todos os membros e organizaremos vários treinamentos para nos ajudar a melhorar nossas habilidades e a encontrar a beleza da vida.Apreciamos o tempo que aprendemos e estudamos juntos. Serviços Temos a capacidade de inovar novos produtos e tecnologias. Podemos fornecer soluções de sistema completas para o seu projeto. Fornecemos formação prática e teórica online e offline. Fornecemos reparação e calibração de instrumentos. Certificação

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What are the methods for finding power cable fault points? 2025-09-16 During actual maintenance and inspection, the biggest dread for repair technicians is encountering a break in a wire or cable and being unable to locate the break. While we often replace or reroute cables when repairing weak current projects, today we'll discuss technical methods for locating cable breaks! When a cable's internal dielectric breaks, the insulation surrounding it prevents the exact location from being seen. This applies to both high-voltage and low-voltage cables. The typical approach to locating the break is to troubleshoot the problem section by section. For example, if a cable breaks, you can measure at three points: one at each end and the middle. If the break is detected, measure at the midpoint. This helps narrow down the area and quickly locate the break. So, what are some common methods for accurately locating a break in a wire or cable? How do you locate a break in a wire or cable? Here are a few common methods to help: 1. Multimeter TestFirst, connect one end of the broken cable to the live power line and leave the other end unconnected. Set the multimeter to the AC2V setting. Starting at the power connection end of the cable, hold the tip of the black pen while slowly moving the red pen along the insulation of the wire. The voltage displayed on the display should be around 0.445V. If the red pen is moved to a certain point, the voltage displayed on the display suddenly drops to a few tenths of 0.0V, about one-tenth of the original voltage. The break is located about 15cm from this point (the live wire connection end). 2. Inductive Test Pen Test MethodAn inductive test pen is a device with an electronic screen that can detect voltage and continuity. First, eliminate any power sources in the cables surrounding the broken cable. Then, connect the broken cable to the live wire. Hold the test pen perpendicular to the wire, press the "Inductive Breakpoint Test" button, and slowly move it forward along the wire. When the AC signal detected by the test pen suddenly disappears, the break is determined to be at that point, with a maximum error of 10cm. It is important to note that the cables surrounding the broken wire must not be powered. It's important to note that this method isn't a panacea. It's more effective with shorter cables, but less effective with longer cables. 3. Using an Audio DetectorAn audio detector uses single-frequency or multi-frequency signals to test line continuity and identify line faults. It can directly locate cables while connected to any switch, router, or PC terminal. Tracing cable routes eliminates the need to peel the cable sheath, making it simple and quick, and it can also pinpoint the location of breakpoints. 4. Cable Fault TesterThis is a comprehensive cable fault detection instrument. It can test for high-resistance flashovers, high- and low-resistance ground faults, short circuits, cable breaks, and poor contact. Equipped with an acoustic locator, it can accurately determine the precise location of the fault. It's particularly suitable for testing power and communication cables of various models and voltage levels. 5. Broken Line Test MethodConnect one end of the wire with the break to the black test lead of a multimeter and the other to the red test lead. Set the multimeter to the 200Ω resistance setting. Bend the cable back and forth at the point most likely to break (such as a frequently bent point). If the multimeter shows intermittent continuity, this is the break. If you're still unsure, start bending the cable from one end until you find the break. This method is suitable for shorter cables. 6. Needle Puncture Test This method involves inserting a steel needle into the broken cable at intervals. Use a multimeter to measure the continuity between the needle and the cable end to determine the break point. Under normal circumstances, this method is not recommended as it can damage the insulation and easily cause other problems later in cable use, especially in high humidity environments. This method uses the continuity and disconnection of the cable to identify the break point. 7. Wire Pull Test This method is also a destructive test method and is generally not used in practice, but it is included here as well. Use pliers to pull the broken wire at the cable end. If the break is near the end, the insulation will easily break. This method is suitable for cables with a break near the end.

Where can cable fault testers be used? 2025-09-16 1. Power IndustryHigh-voltage transmission and distribution systems: Quickly locate short circuits, open circuits, or ground faults to prevent widespread power outages. For example, underground cable faults caused by aging or external damage can be accurately located using pulse reflection or bridge methods. Substation and power grid maintenance: Regularly test cable insulation to prevent potential failures and ensure stable grid operation. 2. CommunicationsFiber and copper cable maintenance: Use time domain reflectometry (TDR) or optical time domain reflectometry (OTDR) to detect breakpoints, signal attenuation, or connector failures. This is suitable for troubleshooting long-distance optical cables or local area network lines. 5G base stations and data centers: Ensure the reliability of communication cables and reduce the risk of network outages. 3. Rail Transit and RailwaysPower supply and signaling systems: Detect faults in overhead cables or signal transmission lines to ensure the safe operation of subways and high-speed trains. For example, insulation faults caused by moisture in tunnel cables can be located. 4. Industrial and ManufacturingFactory equipment power supply: Troubleshoot short circuits or insulation damage in production line cables to reduce downtime losses. For example, failures caused by wear and tear in heavy machinery cables. Petrochemical: Monitoring cable conditions in corrosive environments to prevent leaks or fire risks. 5. Construction and Municipal EngineeringBuilding Electrical Systems: Detecting wiring faults during acceptance testing or locating breakpoints in hidden engineering during repairs. Urban Underground Pipelines: Maintaining municipal cables for streetlights, traffic signals, and other public facilities to improve the reliability of public facilities. 6. New EnergyWind and Solar Power Plants: Detecting faults within wind turbines or photovoltaic array cables, meeting the durability requirements of harsh environments. 7. Mining and ShippingMine Safety: Locating cable faults in complex terrain to ensure underground power supply. Ships and Offshore Platforms: Troubleshooting cable problems in humid and salt-spray environments to ensure normal equipment operation. 8. Military and Emergency ScenariosField Communication Lines: Rapidly repairing temporarily deployed communication cables to maintain smooth battlefield communications. Disaster Relief: Restoring power and communications after earthquakes and floods, and locating damaged cables. 9. Research and EducationCable Technology Research: This research is used to simulate and test faults in cables with new materials or structures, promoting technological development.

What cable faults can a cable fault tester detect? 2025-09-16 A cable fault tester is a comprehensive cable fault detection instrument and an essential tool for maintaining various cables. It can detect high-resistance flashover faults, high- and low-resistance ground faults, short circuits, cable breaks, and poor contact. Equipped with an acoustic locator, it can accurately determine the fault location. It is particularly suitable for testing power cables and communication cables of various models and voltage levels. Let's analyze the types of cable faults detected by a cable fault tester: 1. Open Circuit Fault: A fault in which the cable insulation is normal but the conductor cannot transmit voltage properly is considered an open circuit fault. Examples include a core wire or ground wire that appears to be broken, high resistance at a certain point in the core wire, and a core break. Simple open circuit faults are rare and often manifest as coexisting low-resistance or high-resistance faults. 2. Low-Resistance Fault: A phase-to-phase or phase-to-ground fault that can be directly detected using the "low-voltage pulse method" is called a leakage low-resistance fault. These faults are typically less than a few hundred ohms. If the resistance value is "zero," it's called a short-circuit fault, a special case of a low-resistance fault. 3. Leakage High-Resistance Fault: When the cable's insulation is damaged, a fixed resistance path is formed, but this type of fault cannot be directly measured using the "low-voltage pulse method" of a cable fault tester. This is called a leakage high-resistance fault. The resistance is typically above several hundred ohms. When performing a DC leakage withstand voltage test on a cable in the field, the leakage current increases continuously with increasing DC voltage, far exceeding the cable's specified value. Leakage high-resistance faults and low-resistance faults are relative and not strictly distinguished. 4. Flashover High-Resistance Fault: Within the cable's pretest voltage range, when the pretest voltage reaches a certain value, the cable's leakage current suddenly increases, significantly exceeding the specified value for the tested cable. This type of fault is called a flashover high-resistance fault. At this fault point, although the cable insulation is damaged, no fixed resistance path is formed.

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