Wuhan GDZX Power Equipment Co., Ltd Berita Perusahaan

Both types of equipment are used for testing the electrical properties of insulating oil, but their test parameters and applications differ. Below is a separate explanation: 1.Insulating Oil Dielectric Strength Tester Main Test Items: Breakdown voltage of insulating oil (dielectric strength). Measures the voltage at which the oil sample is electrically punctured by gradually increasing the applied voltage. Purpose: Evaluates the oil’s ability to withstand electric fields. Determines whether the oil contains moisture, impurities, bubbles, or other factors affecting insulation performance. This is the most basic and commonly used test for insulating oil in power systems. Applicable Scenarios: Routine maintenance of oil-immersed equipment such as transformers, reactors, and capacitors. Periodic preventive testing. 2.Insulating Oil Dielectric Loss & Volume Resistivity Tester Main Test Items: Dielectric loss factor (tgδ): Indicates the dielectric energy loss in the oil. Volume resistivity: Reflects the oil’s resistance to leakage current. Purpose: Provides a more detailed assessment of oil aging, moisture content, and dissolved impurities. Can detect potential problems that may not be revealed by dielectric strength testing alone. Offers an in-depth evaluation of both oil quality and equipment insulation condition. Applicable Scenarios: Situations with high requirements for equipment safety and reliability. Acceptance testing of new oil or post-maintenance evaluation of critical equipment. Further diagnosis of abnormal oil samples. How to Choose? Basic Monitoring: If only routine, periodic testing is needed → Dielectric Strength Tester is sufficient. In-depth Diagnosis: If a comprehensive assessment of oil condition (aging, moisture, impurities) is required → Dielectric Loss & Volume Resistivity Tester is recommended. Comprehensive Application: Many power companies use both devices together, first screening with the dielectric strength tester, then confirming with the dielectric loss/resistivity tester. Combined use can build a complete insulating oil testing system, from basic to advanced, providing the most reliable protection for the safe operation of power equipment.

This is a common question in electrical testing.Although the names of these three instruments sound similar, their purposes, test objects, and methods are completely different: 1.Ground Resistance Tester What it measures: The resistance between a grounding device and the earth. Ensures that lightning current or fault current can be safely discharged into the ground. Applications: Substation grounding grids Power equipment grounding systems Lightning rod grounding Building grounding systems 2.Loop Resistance Tester What it measures: The contact resistance of high-current circuits, such as switchgear, cable joints, and busbar connections (typically in the micro-ohm range). Focuses on whether the contact points may overheat, ensuring reliable current transmission. Applications: Contact resistance of high-voltage circuit breakers Busbar and cable joint testing Electrical performance testing during factory inspection or maintenance of HV switchgear 3.Insulation Resistance Tester (commonly called “Vibrometer”) What it measures: The insulation resistance between electrical equipment and ground or between phases. Evaluates the insulation condition to prevent leakage current or breakdown. Applications: Insulation testing of motors, transformers, and power cables Control panels and wiring inspection Household appliances insulation check Key Differences Tester Test Object Test Purpose Resistance Range Test Voltage/Current Ground Resistance Tester Grounding system – Earth Check grounding reliability Ohms to tens of ohms Low-frequency current, auxiliary electrode method Loop Resistance Tester Contacts, circuit connections Check contact quality Micro-ohm level High current (tens to thousands of amperes) Insulation Resistance Tester Insulating materials Check insulation quality Mega-ohms to giga-ohms High DC voltage (commonly 500V – 5kV) In simple terms: Ground resistance: checks “how well you are connected to earth” Loop resistance: checks “how good the circuit contact is” Insulation resistance: checks “whether the insulation is reliable”

【News】How to Choose the Right SF6 Density Relay Tester? In power systems, the SF6 density relay plays a vital role in ensuring the safe operation of SF6 electrical equipment such as GIS switchgear and circuit breakers. Since it operates infrequently during service, it may suffer from issues like sluggish action, poor contact, or degraded temperature compensation over time. Therefore, regular verification with an SF6 Density Relay Tester is essential to ensure reliable performance. For buyers, facing various models and brands on the market often raises the question: How should I choose the right tester? The following points may serve as a practical guide. 1. Accuracy and Compliance with Standards Accuracy is the top priority when selecting a tester. Choose products that comply with IEC and national power industry standards. Higher accuracy ensures more reliable assessment of relay performance. Check if the device is supplied with a calibration certificate from the manufacturer or a third-party authority. 2. Applicability and Compatibility Since SF6 density relays vary across manufacturers: Confirm whether the tester supports pressure-gauge type, contact-type, and other relay models. Ensure it is suitable for both laboratory calibration and on-site testing. Verify that the interfaces and accessories are universal and easy to connect. 3. Ease of Operation For field engineers, user experience directly affects efficiency: Does the tester support automatic testing / one-key start? Is it equipped with a touch screen and bilingual (Chinese/English) menu for easier use? Can it store test data, export via USB, or print directly, making reporting more convenient? 4. Portability and Structural Design Field testing requires instruments to be durable and portable: Choose models that are lightweight yet robust. Ensure the housing has shockproof, moisture-proof, and dust-proof protection. Check if it comes with a built-in air pump or external gas source option, offering more flexibility. 5. Safety and Environmental Protection With stricter safety and environmental standards, these functions are crucial: The tester should provide overpressure and leakage protection to ensure operator safety. It should include SF6 gas recovery capability to prevent emissions and meet environmental regulations. 6. After-Sales Service and Maintenance A reliable tester is backed by dependable service: Does the supplier provide periodic calibration, technical training, and operational guidance? Is there prompt and professional after-sales support? Are spare parts readily available to ensure long-term use? Conclusion For buyers, choosing an SF6 Density Relay Tester is not just about comparing prices. A wise decision should consider accuracy, compatibility, ease of operation, portability, safety, environmental performance, and after-sales service. Only then can the equipment truly safeguard SF6 electrical devices, reduce maintenance risks, and deliver long-term value.

In power systems, surge arresters protect transformers, switchgear, and other equipment from lightning and switching overvoltages. To ensure their reliable performance, professional testing instruments are often required. Two commonly used devices are the Arrester Discharge Counter Tester and the Zinc Oxide Arrester Tester. Although both are used in arrester inspections, they differ significantly in function and application. 1. Differences in Function and Test Items Instrument Main Test Items Key Features Arrester Discharge Counter Tester Checks the working status and discharge count of an arrester’s online monitoring device (discharge counter); verifies the connection between the counter and the arrester Compact, lightweight, and easy to operate; mainly used to confirm whether the counter is sensitive and records accurately Zinc Oxide Arrester Tester Measures key parameters of a zinc oxide arrester, such as reference voltage, leakage current, and V–I characteristics Provides a comprehensive assessment of the arrester’s insulation and aging status, serving as an important tool for evaluating arrester health 2. Application Scenarios Arrester Discharge Counter TesterSuitable for routine inspections, quick on-site checks, or acceptance testing of new installations, ensuring the counter is correctly installed and functions reliably. Zinc Oxide Arrester TesterPrimarily used for maintenance and troubleshooting. During annual preventive tests or fault diagnosis, it measures leakage current and other indicators to assess whether the arrester has issues such as moisture ingress, aging, or breakdown. 3. How to Choose Need to quickly verify a discharge counter → Choose the Arrester Discharge Counter Tester for its portability and simple operation. Need a full assessment of arrester performance → Choose the Zinc Oxide Arrester Tester, which provides complete electrical characteristic data, ideal for maintenance teams or laboratories. For large substations or professional service units, it’s recommended to use both: start with the counter tester for routine patrols, then use the zinc oxide tester for in-depth evaluation, creating a complete maintenance system. ConclusionThe Arrester Discharge Counter Tester and Zinc Oxide Arrester Tester are not substitutes but complementary tools for different testing objectives. When purchasing, users should consider their actual testing needs, maintenance schedule, and budget to select the right device—or a combination of both—to better ensure the safe and stable operation of power systems.

Zinc oxide surge arresters (MOAs) protect power equipment from lightning and switching overvoltage. Over time, their insulation and leakage current may change, so regular testing is important. Below are answers to common questions from our customers. 1. Do new arresters need testing?  Yes. Test before installation or commissioning to set baseline data. 2. How often should they be tested?  Every 1–2 years, checking leakage current, resistive current, and reference voltage. 3. When should testing be done immediately?  After: Visible damage (cracks, discharge marks) Moisture or dirt on the base or housing Lightning strikes or switching surges Leakage current alarms 4. During overhauls or maintenance?  Yes. Include surge arrester testing in scheduled inspections or repairs. Benefits of a Tester Accurate leakage current measurement (separates resistive and capacitive parts) On-line testing without disassembly Works with various voltage levels for substations and transmission lines Summary Surge arresters are the grid’s first line of defense. Routine testing with a quality instrument prevents failures and outages.Need advice on test intervals? Contact our team — we’ll create a plan based on your equipment and environment. Tip:A clear testing schedule plus reliable instruments = safe and stable power systems.

A portable transformer oil chromatograph is a high-tech instrument specifically designed for on-site gas chromatographic analysis of insulating oil in power transformers and other oil-filled electrical equipment (such as reactors, instrument transformers, and bushings).Its core purpose is to detect fault-characteristic gases dissolved in oil, diagnose potential internal faults, and serve as a key tool for condition-based maintenance (CBM) and preventive testing in the power industry. Key Concerns for Users: 1.Accuracy and Reliability of Analysis Our device adopts the classic “three-detector process,” completing full analysis of seven dissolved gases (H₂, CH₄, C₂H₄, C₂H₆, C₂H₂, CO, CO₂) in a single injection. The results are highly consistent with those from laboratory-grade chromatographs, with qualitative deviation ≤1% and quantitative deviation ≤3%, ensuring precise and trustworthy data. 2.Portability and Rapid DeploymentWith an advanced compact modular design, the instrument weighs less than 15 kg and comes with a trolley case, making it easy to carry to field sites. It provides timely, accurate data for transformer inspections while saving substantial manpower and time. 3.Intelligent and User-Friendly OperationA fully computerized touch-screen interface allows real-time monitoring of temperature and carrier-gas flow across four channels. Parameters are set with one touch, and users only need simple power-on/off operations to perform routine testing, greatly reducing the operating threshold. 4.Stability and Protection FunctionsThe system features multiple safeguards: automatic bridge-current cutoff when pressure or flow exceeds preset limits, protection of the thermal-conductivity detector in case of carrier-gas loss, and automatic shutdown with fault alerts if temperature control fails—ensuring long-term stable operation. 5.Networking and Data ManagementBuilt-in 10/100 M adaptive Ethernet enables fast remote data transmission. The dedicated chromatograph workstation for power systems supports centralized management of multiple devices, providing trend analysis, over-limit alarms, three-ratio diagnostics, and more to help O&M teams make informed decisions. Technical Advantages at a Glance: Minimum detectable concentration: H₂ 2 µL/L, CO 1 µL/L, CH₄ 5 µL/L, C₂H₄/C₂H₆/C₂H₂ 0.1 µL/L Temperature range: ambient + 4 °C to 450 °C, control accuracy ±0.05 °C Six temperature-control zones, ≥20-step programmed heating Dimensions: 450 × 430 × 230 mm; weight < 15 kg Certification and Market Recognition: This portable oil chromatograph has been tested by the Shandong Provincial Institute of Metrology, with all performance indicators reaching international advanced levels. It was awarded the Shandong Provincial Key New Product title in 2020 and received government funding for technology transformation.The instrument complies with international standards IEC 60567:2011 and IEC 60599:2015.

Dalam industri tenaga listrik, kinerja isolasi adalah kunci untuk memastikan pengoperasian peralatan listrik yang aman dan andal. Untuk memverifikasi tingkat isolasi, Uji Tegangan Tahan Frekuensi Daya telah menjadi inspeksi penting selama tahap manufaktur, pemasangan, dan pengoperasian. Apa itu Uji Tegangan Tahan Frekuensi Daya? Uji Tegangan Tahan Frekuensi Daya, juga dikenal sebagai Uji Tahan AC, menerapkan tegangan frekuensi daya yang lebih tinggi dari tegangan pengoperasian terukur ke peralatan listrik selama durasi tertentu. Tujuannya adalah untuk memeriksa apakah isolasi dapat menahan tegangan yang diterapkan tanpa kerusakan atau flashover. Ini adalah salah satu uji isolasi yang paling mendasar dan kritis. Mengapa Uji Ini Diperlukan? 1. Verifikasi Kekuatan IsolasiPeralatan seperti kabel, transformator, switchgear, dan transformator instrumen harus beroperasi di bawah tegangan frekuensi daya jangka panjang. Uji ini memastikan kekuatan isolasi mereka memenuhi persyaratan dan dapat menahan kondisi pengoperasian yang sebenarnya. 2. Deteksi Cacat PotensialIsolasi dapat memburuk karena faktor-faktor seperti kelembaban, penuaan, kerusakan permukaan, atau cacat manufaktur. Dengan menerapkan tegangan yang lebih tinggi, uji ini membantu mengungkap masalah tersembunyi sejak dini, memungkinkan perawatan dan perbaikan tepat waktu. 3. Mematuhi Standar IndustriStandar internasional dan nasional (IEC, IEEE, GB, dll.) mewajibkan pengujian tegangan tahan frekuensi daya sebagai langkah kritis untuk inspeksi pabrik, pengujian penerimaan, dan pemeliharaan preventif. 4. Memastikan Keselamatan Jaringan dan PersonelIsolasi yang tidak memadai dalam layanan dapat menyebabkan kerusakan, korsleting, pemadaman, atau bahkan cedera pribadi. Uji ini secara signifikan mengurangi risiko tersebut, memastikan stabilitas sistem dan keselamatan operator. Kesimpulan Uji Tegangan Tahan Frekuensi Daya bukan hanya “pos pemeriksaan kualitas” dalam pembuatan dan pengoperasian peralatan listrik, tetapi juga pengaman penting untuk pengoperasian jaringan listrik yang aman dan stabil. Dengan memverifikasi kinerja isolasi, mendeteksi potensi cacat, dan memenuhi standar industri, ia memainkan peran penting dalam meningkatkan keselamatan dan keandalan sistem tenaga listrik. Keselamatan tenaga listrik tidak pernah menjadi masalah kecil — itu dimulai dengan pengujian tegangan tahan yang andal untuk menjaga setiap kilowatt-jam listrik.

Generator tegangan tinggi Very Low Frequency (VLF) seri ZXVLF adalah perangkat khusus untuk melakukan tes tegangan tahan dan diagnostik isolasi pada kabel listrik tegangan menengah dan tinggi,Mesin listrik berputar (seperti generator dan motor besar), dan peralatan listrik kapasitif lainnya (seperti kapasitor daya dan aksesori kabel). Dengan menghasilkan tegangan tinggi sinusoid frekuensi ultra rendah 0,1Hz, ia menyediakan penggantian yang setara untuk frekuensi daya (50Hz/60Hz) menahan pengujian tegangan.Ini menghilangkan tantangan yang terkait dengan pengujian sampel kapasitas besar (seperti kabel panjang) pada frekuensi daya, yang biasanya membutuhkan peralatan yang besar dan rumit yang sulit untuk diangkut dan ditangani di tempat. Hal ini banyak digunakan untuk kabel, generator, motor, trafo, dan switchgear, sepenuhnya memenuhi standar IEC, IEEE, dan industri listrik nasional. Fitur Utama Kecerdasan Tinggi: Teknologi konversi frekuensi digital dengan kontrol microcomputer memungkinkan peningkatan, penurunan, dan pengukuran secara otomatis. Operasi Mudah: kabel sederhana, layar sentuh LCD 7 inci, dan antarmuka yang mudah digunakan. Perlindungan yang Komprehensif: Perlindungan atas tegangan dan arus di kedua sisi HV dan LV, respons cepat (≤10ms), memastikan keamanan. Aman & Dapat Diandalkan: Kontroler dan generator HV terhubung melalui isolasi fotoelektrik tegangan rendah untuk keamanan maksimum. Output yang Stabil: Dilengkapi dengan sirkuit umpan balik negatif HV/LV loop tertutup untuk menghilangkan efek peningkatan kapasitas. Pengambilan Sampel yang Tepat: Data tegangan dan arus langsung diambil sampel di sisi HV untuk hasil yang benar dan tepat. Dilengkapi dengan Baik: layar sentuh kapasitif 7 inci, layar LCD, penyimpanan otomatis, dan fungsi pencetakan. Jangkauan Uji yang Luas: Beberapa pilihan frekuensi (0,1Hz, 0,05Hz, 0,02Hz) untuk mencakup objek uji yang berbeda. Ponsel portabel: Kompak dan ringan, nyaman untuk pengujian lapangan. Tampilan multibahasa: Mendukung switch Cina-Inggris, bahasa lain disesuaikan.

Ketika dua konduktor menyentuh, Anda akan berharap listrik mengalir bebas tetapi dalam kenyataannya, tidak.Pada tingkat mikroskopis, permukaan logam kasar, sehingga arus hanya melewati beberapa titik kecil.resistensi kontak. Mengapa itu penting:Resistensi kontak yang terlalu tinggi pada saklar, pemutus, atau sendi busbar dapat menyebabkan: Pemanasan berlebihan Kerugian daya Lensa kontak rusak Kegagalan peralatan Apa penyebabnya? Efek penyempitan Film permukaanOksida, kelembaban, atau kotoran yang menghalangi arus Faktor materialBeberapa logam (seperti perak, emas) lebih tahan terhadap oksidasi daripada tembaga Bagaimana kita mengujinya? Cara standar adalahMetode penurunan tegangan DC: Menggunakan arus tinggi (100A?? 600A) Mengukur penurunan tegangan kecil Gunakan hukum OhmR=U/IR = U/IR=U/Akuuntuk menghitung resistensi Singkatnya:Rintangan kontak mungkin kecil, tetapi dapat menyebabkan masalah besar. Apakah Anda memantau resistensi kontak di proyek Anda?

Pengantar:Pemutus sirkuit adalah penjaga sistem listrik kita. mereka bertindak langsung untuk memutus bagian yang rusak dari sirkuit.mencegah penyebaran kecelakaanMemastikan bahwa pemutus sirkuit bekerja dengan andal sangat penting dan di situlahPenguji pemutus sirkuitAyo masuk. Apa itu Penguji Pemutus Sirkuit? APenguji pemutus sirkuitadalah perangkat pengujian listrik khusus yang digunakan untuk mendeteksi, memverifikasi, dan mengevaluasi kinerja pemutus sirkuit tegangan tinggi dan rendah.Ini membantu profesional listrik memastikan bahwa pemutus sirkuit siap untuk bekerja ketika grid menuntut. Fungsi Utama 1. Uji Waktu OperasiMengukur waktu penutupan dan pembukaan, serta asinkronisme tiga fase, untuk menentukan apakah pemutus sirkuit beroperasi dengan akurat dan responsif. 2Uji Karakteristik MekanisMengevaluasi parameter seperti kecepatan pembukaan/penutupan, stroke, over-travel, dan rebound amplitudo untuk menilai kinerja mekanik pemutus. 3Uji Karakteristik DinamisMenganalisis bentuk gelombang arus dan tegangan dinamis untuk mempelajari perilaku pemutus selama operasi. 4. Uji resistensi sirkuit utamaMengukur ketahanan kontak pemutus untuk menilai konduktivitas dan kondisi kontak. 5. Waktu istirahat minimum dan tes penutupan kembaliMemeriksa kemampuan pemutus untuk membuka dan menutup berulang kali dalam waktu singkat, memastikan memenuhi persyaratan beralih cepat dari jaringan listrik. Skenario Aplikasi Pembangkit listrik dan substasiun Departemen pemeliharaan daya Produsen peralatan switch tegangan tinggi Institut penelitian listrik Kesimpulan:Singkatnya, penguji pemutus sirkuit adalah sepertiDokter untuk pemutusDengan melakukan serangkaian tes listrik dan mekanik, ia memastikan bahwa pemutus beroperasi dengan aman, cepat, dan dapat diandalkan.

Definisi Inti Relay Protection Tester (juga dikenal sebagai Automated Test Set) adalah perangkat elektronik khusus yang dirancang untukmenguji dan memverifikasi kinerja dan keandalan relay pelindung dalam sistem tenaga. Fungsi & Kemampuan Simulasi kesalahan: Secara akurat menghasilkan sinyal kesalahan seperti overcurrent, over/under voltage, perlindungan jarak, perlindungan diferensial, dan deviasi frekuensi. Verifikasi Logika: Memastikan relay dapat dengan benar dan segera mengeluarkan perintah trip ke pemutus sirkuit ketika kondisi abnormal terdeteksi. Mengatur Verifikasi: Mengkonfirmasi bahwa relay bekerja dengan tepat pada titik pengaturan yang dikonfigurasi (arus, tegangan, waktu) seperti yang diperlukan oleh standar jaringan. Pengujian Otomatis: Dengan perangkat lunak khusus, penguji dapat secara otomatis menjalankan urutan tes yang kompleks dan menghasilkan laporan tes yang komprehensif. Nilai Aplikasi Penguji perlindungan relay sangat penting untuk memastikan operasi sistem tenaga yang aman dan stabil. Pemeliharaan rutin dan inspeksi peralatan listrik Pengujian penerimaan instalasi baru sebelum dioperasikan Analisis setelah kesalahan untuk memverifikasi operasi relay dan logika perlindungan Pentingnya pengujian relay terletak pada fakta bahwa, selama sirkuit pendek atau kesalahan tanah,Keandalan dan kecepatan operasi relay (sering dalam milidetik)menentukan secara langsung apakah: Peralatan dilindungi dari kerusakan parah Jaringan listrik tetap stabil atau mengalami pemadaman skala besar Insiden keamanan dapat dicegah Dengan demikian, tester perlindungan relay adalah alat yang sangat diperlukan di pembangkit listrik, substasiun, dan jaringan transmisi. Keuntungan GDZX GDZX menawarkan berbagai tes perlindungan relay, dari model standar hingga solusi otomatis canggih, memenuhi persyaratan pengujian yang beragam di seluruh industri listrik.Jangan ragu untuk menghubungi kami kapan saja untuk solusi rinci dan penawaran.

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