Wuhan GDZX Power Equipment Co., Ltd Company News

In the power industry, insulation integrity testing for transformers and instrument transformers is critical to ensure compliance with national standards and operational reliability. Among these tests, the induced withstand voltage test for inter-turn, layer, section, and phase insulation (longitudinal insulation) is particularly demanding. Traditional methods often require complex setups and high-capacity power sources. The ZXBP Series Electronic Multi-Frequency Generator addresses these challenges by providing a compact, versatile, and efficient solution for longitudinal insulation testing. This article explores its technical features, specifications, and applications for power equipment testing. Key Technical Features 1.Multi-Frequency Output FlexibilityUnlike conventional triple-frequency generators, the ZXBP series supports 1×, 2×, 3×, and 4× frequency outputs (50–200 Hz). This enables precise compliance with test standards for transformers and instrument transformers under varying voltage and frequency conditions. 2.Compact Design with High Power DensityUtilizing advanced power electronics, the ZXBP achieves high power output (up to 20 kVA) in a lightweight, portable form factor. This design minimizes on-site space requirements and simplifies transportation, particularly for field testing. 3.Low Waveform DistortionThe device generates sinusoidal waveforms with 

The ZXDN-3600 handheld power quality analyzer is a high-precision instrument designed for comprehensive evaluation of electrical grid performance. Targeting technicians and engineers, this device enables precise detection of waveform distortion, harmonic content, voltage fluctuations, flicker, and three-phase imbalances. Equipped with advanced measurement capabilities, it serves as a critical tool for both field diagnostics and laboratory-standard metrology, ensuring compliance with power quality standards and optimizing grid reliability. Key Features 1.Multi-Parameter MeasurementThe analyzer measures voltage (20–800V, auto-ranging), current (via clamp sensors: 5A–2000A selectable), active/reactive power, phase angle, power factor, and frequency. Its three-phase voltage (UA, UB, UC) and current (IA, IB, IC) channel design supports simultaneous waveform visualization for all phases, aiding in rapid fault identification. 2.Vector Analysis & Harmonic ProfilingA dynamic vector diagram display assists in verifying metering device wiring correctness. Harmonic analysis extends to the 63rd order, with voltage/current harmonic distortion errors as low as 0.1% and 0.2%, respectively. This precision ensures accurate identification of harmonic pollution sources. 3.Power Quality Compliance TestingThe device evaluates frequency deviation (±0.01Hz accuracy), voltage unbalance (≤0.2% error), voltage fluctuations, flicker, and transient disturbances. Its "load fluctuation monitoring" mode records trends in voltage, current, and power parameters at user-defined intervals (1-minute storage for 18+ months), ideal for long-term grid health assessments. 4.Robust Data ManagementWith 10-hour battery life and a 320×240mm color LCD, the ZXDN-3600 supports field operations under harsh conditions (-10°C to +40°C). Data can be stored internally or exported via USB to proprietary software for detailed analysis, report generation, and compliance documentation. 5.Dynamic System DiagnosticsThe analyzer monitors reactive compensation and filter performance, providing quantitative evaluations of grid correction devices. Its "lock screen" function freezes measurements for stable readings, while conductive silicone keypad ensures durability in demanding environments. Technical Specifications Accuracy: Voltage: ±0.1% | Current/Power: ±0.5% | Phase: ±0.2° Frequency: ±0.01Hz | Unbalance: ≤0.2% | Harmonics: ≤0.1% (voltage), ≤0.2% (current) Safety: 100MΩ insulation, 1.5kV AC withstand voltage Portability: 2.0kg weight, 10-hour Li-ion battery Data Storage: 18+ months at 1-minute intervals Applications 1.Grid Troubleshooting: Detect wiring errors, harmonic sources, and phase imbalances via vector diagrams and waveform displays. 2.Equipment Validation: Assess performance of transformers, capacitors, and filters during commissioning. 3.Energy Audits: Quantify voltage deviations and flicker impacts on sensitive industrial loads. 4.Research & Compliance: Generate IEC/IEEE-standard reports for regulatory submissions.The ZXDN-3600 combines laboratory-grade accuracy with field-portable versatility, making it indispensable for modern power systems analysis. Its integration of real-time monitoring, deep data storage, and advanced diagnostics empowers technicians to address grid inefficiencies proactively, ensuring stable and efficient energy delivery. GDZX is a manufacturer of power testing equipment, offering a wide range of product categories with comprehensive models and providing professional technical support. Contact: +86-17396104357.Website: https://www.highvoltage-testequipment.com/

The XZ-3 Wireless High-Voltage Digital Phase Sequence Meter represents a leap forward in high-voltage grid maintenance and safety. Designed for 6–220 kV systems, this device integrates wireless sensing, phase-sequence analysis, and phasing verification into a single platform. This paper examines its technical architecture, operational principles, and field applications, with a focus on its role in enhancing safety and efficiency for live-line working (LLW) and grid diagnostics. 1. IntroductionThree-phase sequence verification and phase-angle synchronization are critical in HV grid operations. Traditional methods require direct contact or complex insulated tools, posing safety risks and operational inefficiencies. The XZ-3 addresses these challenges through wireless, non-contact measurement, enabling real-time phase analysis while maintaining safe clearance distances. 2. System ArchitectureThe XZ-3 comprises three RF-enabled transmitters (X, Y, Z) and a centralized receiver (Fig. 1). Each transmitter operates as a distributed sensor node, capturing: Phase angle (Φ) with ≤10° accuracy Frequency (f) with ±0.1 Hz precision Voltage presence (via capacitive coupling, leakage 130 m (ISM band, adaptive modulation) Power:

The ZXHQ-B+ Variable Frequency Transformer Comprehensive Testing Instrument is a next-generation solution engineered for precision testing of current transformers (CTs) and voltage transformers (PTs) in power systems. Developed through extensive market research and theoretical innovation, this device integrates high-performance DSP and ARM processors with advanced manufacturing techniques to deliver unmatched reliability, automation, and testing efficiency. Designed to meet the rigorous demands of modern power grids, it stands as a benchmark for transformer testing in the electrical industry. 1.Key Technical Features Multi-Functional Testing Capabilities Supports comprehensive evaluation of CTs (protection, metering, and TP classes) and protection-class PTs. Core tests include: Excitation characteristics (voltage-current curve). Ratio, polarity, and secondary winding resistance. Secondary burden, ratio error, and phase error. Protection PT electromagnetic unit analysis. 2.Intelligent Parameter Calculation Automatically computes critical parameters: Knee-point voltage/current, 5%/10% error curves. Accuracy limit factor (ALF), instrument security factor (FS). Secondary time constant (Ts), remanence factor (Kr), saturated/unsaturated inductance. Compliance with IEC 60044-1/6, GB20840.1-3, and adaptive standard selection based on transformer type. 3.High-Voltage Testing via Low-Frequency Methodology Employs low-frequency injection technology to resolve excitation characteristics for CTs with knee-point voltages up to 45 kV, ensuring safety and accuracy. 4.User-Centric Design Graphical interface: Intuitive Chinese/English display with real-time data visualization. One-click automation: Unified wiring for CT resistance, excitation, ratio, and polarity tests. Data management: Stores 2,000 test datasets; USB export enables PC-based analysis and automated Word report generation. 5.Portability and Robustness Compact dimensions (340 × 180 × 330 mm) and lightweight design (

The XZ-2 High-Voltage Phase Sequence Indicator represents a significant advancement in electrical testing instrumentation, designed to address the critical need for accurate phase sequence verification across multiple voltage levels in power systems. This device enables technicians to efficiently determine whether three-phase systems (A, B, C) are correctly aligned, ensuring operational safety and compliance with grid standards. With its robust technical specifications and user-centric design, the XZ-2 has emerged as an indispensable tool for high-voltage applications ranging from 50 V to 500 kV. Key Features and Innovations 1.Multi-Voltage CompatibilityThe XZ-2 supports a wide operational range, including low-voltage systems (100–380 V) and high-voltage networks (1–500 kV). By integrating attenuation components with tailored resistance values (36–1,100 MΩ) and adjustable insulation tubes, the device ensures safe and reliable measurements across diverse environments. 2.Intuitive Visual FeedbackA dual-LED indicator system simplifies phase sequence identification: Red LED movement: Confirms positive phase sequence (A→B→C). Green LED movement: Indicates reverse phase sequence (C→B→A). 3.Energy-Efficient DesignAn integrated auto-power management system activates the device during use and shuts it down after idle periods, extending battery life (9 V DC) while reducing maintenance demands. 4.Ergonomic and PortableCompact dimensions (140 × 82 × 40 mm) and lightweight construction (0.3 kg) enhance field portability. The insulated telescopic rod system—adjustable from 2.0 m (6 kV) to 5.0 m (500 kV)—provides safe physical clearance during high-voltage testing. Technical Specifications Parameter 6–10 kV 35 kV 110 kV 220 kV 500 kV Attenuation Length (m) 0.35 0.35 0.90 1.20 2.00 Resistance (MΩ) 36 100 300 450 1,100 Effective Length (m) 0.80 1.50 2.00 3.00 5.00 Total Length (m) 2.00 2.50 2.90 3.80 5.00 Sections 4 5 3 4 5 Additional Parameters Input Voltage Range: 50 V–10 kV (direct); 1–10 kV (with insulation tube) Operating Temperature: -20°C to +50°C Storage: Aluminum case (750 × 150 × 150 mm, 2 kg) for shock resistance and environmental protection. Applications in Power Systems 1.Grid MaintenanceVerifies phase sequence alignment during transformer commissioning, feeder reconfiguration, or parallel generator synchronization to prevent equipment damage from phase mismatches. 2.High-Voltage SubstationsEnables safe testing of 35–500 kV transmission lines using extendable insulated rods, complying with IEC 61477 live-working standards. 3.Renewable Energy IntegrationEnsures correct phase rotation in solar/wind farm inverters to maintain grid stability during renewable energy integration. Advantages Over Conventional Methods Safety Enhancement: Composite insulation materials and calibrated attenuation resistors minimize leakage current risks at ultra-high voltages. Operational Efficiency: Clear LED indicators eliminate ambiguity in phase identification, reducing diagnostic time by ~40% compared to oscilloscope-based methods. Scalability: Customizable configurations (e.g., extended rod lengths or resistance values) support bespoke voltage requirements. The XZ-2 High-Voltage Phase Sequence Indicator redefines reliability in phase sequence verification through its adaptive design and precision engineering. By merging safety, portability, and multi-voltage adaptability, it addresses critical challenges in modern power systems—from legacy grid upgrades to smart grid deployments. Technicians and engineers will find this instrument indispensable for ensuring operational integrity in increasingly complex electrical networks. GDZX is a manufacturer of power testing equipment, offering a wide range of product categories with comprehensive models and providing professional technical support. Contact: +86-17396104357.Website: https://www.highvoltage-testequipment.com/ 

The ZXBXZ series resonant AC withstand voltage test system represents a critical advancement in high-voltage testing technology for substation equipment. Designed for comprehensive testing of transformers, GIS systems, SF6 switches, cables, and other capacitive devices up to 500kV, this system leverages series resonance principles to deliver precision, safety, and flexibility. This article provides a technical comparison of ZXBXZ configurations, focusing on design philosophy, performance metrics, and application-specific adaptability. Core Technology and Working Principle The ZXBXZ system operates on the principle of series resonance, where inductive reactance (from adjustable reactors) cancels out capacitive reactance (from the test object) at a specific frequency. This enables efficient energy transfer with minimal input power, achieving high output voltages (up to 1000kV) while maintaining sinusoidal waveform purity (

In power systems, the integrity of grounding connections is critical for equipment safety and operational reliability. Grounding down-conductors serve as the primary pathway between electrical equipment and the grounding grid. Over time, environmental factors such as moisture and corrosion can degrade these connections, leading to increased resistance and potential failure risks. The ZXDT-10A Grounding Down-Conductor Continuity Tester addresses these challenges by providing precise, efficient measurements of continuity resistance in grounding systems. This article evaluates the ZXDT-10A's technical capabilities, contrasts it with conventional methods, and highlights its advantages for modern power infrastructure. Technical Overview of ZXDT-10A Key Specifications: Output Current: 10A (fixed, non-adjustable) Measurement Range: 1–2000 mΩ Accuracy: ±(0.5% + 2 digits) Measurement Radius: 50 meters Measurement Time: 2 seconds per test Display: LED readout Power Supply: AC 220V Operating Environment: -10°C to 40°C, ≤90% humidity Core Features: High-Current DC Testing:Delivers a stable 10A DC output, eliminating inductive reactance interference common in AC-based testers. This ensures accurate resistance measurements unaffected by electromagnetic noise in substations. Rapid Measurement:Unlike traditional methods requiring lengthy discharge cycles (e.g., battery-powered testers), the ZXDT-10A completes tests in 2 seconds, enhancing field efficiency. Zero Manual Calibration:Automatically compensates for line resistance without operator intervention, contrasting with legacy devices needing frequent short-circuit calibration. Robust Design:Integrated shock-resistant structure (290×260×100 mm) suits harsh substation environments. Industry Comparison: ZXDT-10A vs. Conventional Testers Parameter ZXDT-10A Traditional Testers Output Current 10A (fixed DC) 1–20A (adjustable, often AC) Measurement Speed 2 seconds 10–30 seconds (incl. stabilization) Anti-Interference DC method avoids AC coupling Susceptible to grid harmonics Calibration Automatic zero adjustment Manual short-circuit calibration Portability Compact, no battery required Bulkier, battery-dependent units Accuracy ±0.5% + 2 digits ±1–2% (typical for analog devices) Critical Advantages: Precision in High-Noise Environments:The DC testing method bypasses inductive/capacitive coupling effects, making the ZXDT-10A ideal for substations with strong electromagnetic interference. Conventional AC testers often yield inflated readings due to harmonic distortion. Operational Efficiency:Field tests at a large substation (50+ grounding points) can be completed in 500 mΩ) with no false readings. Post-repair retests confirmed all values

The PDF-3000B DC System Ground Fault Tester is an advanced diagnostic tool designed to address grounding faults in DC power systems across substations, power plants, and industrial facilities. Combining portability with online monitoring-grade performance, the device integrates phase lead processing technology and data transfer algorithms to deliver high sensitivity, anti-interference capability, and operational safety. It enables non-invasive fault detection and precise localization without disconnecting power sources, making it indispensable for maintaining grid reliability.  Key Features  1.Dual-Mode Operation Analyzer: Directly powered by the DC bus (30–280V range), eliminating external AC/battery dependencies. Locator: Battery-powered (12V Li-ion) for field portability. 2.Comprehensive Fault DetectionDetects and locates all grounding types: High-resistance, virtual, direct, or capacitive grounding. AC interference (0–280V), diode-isolated circuits, and mixed AC/DC faults. Battery bank grounding and busbar capacitance (1–200μF). 3.Intelligent Signal Processing Directional Leakage Current Analysis: Measures phase and amplitude (0–100mA range, ±0.1mA resolution) to identify fault direction. Ripple Analysis & Digital Oscilloscope: Filters noise via spectral analysis and visualizes waveforms. 4.Safety & Compatibility Low output power (

As power grids evolve toward higher complexity and intelligence, the demand for advanced diagnostic tools grows. The TAG-8000 Wireless High-Voltage Phase Comparator emerges as a cutting-edge device designed to address challenges in grid synchronization, phase verification, and safety compliance. Tailored for 6kV–500kV AC transmission lines, this instrument integrates wireless technology, real-time analytics, and user-centric features, positioning itself as a critical tool for technicians in 2025’s dynamic power industry.  Key Features and Innovations 1.Wireless Remote Phase ComparisonThe TAG-8000 eliminates the risks associated with traditional wired systems by employing robust wireless transmission with a line-of-sight range of 100 meters, enabling safe operation in high-voltage environments. Its upgradable firmware supports remote nuclear phase verification, aligning with the industry’s shift toward digitalized grid management. 2.Intelligent Human-Machine Interface A 320×240 color LCD displays phase difference, frequency, vector diagrams, and phase alignment results. Voice prompts guide technicians through workflows, reducing operational errors and enhancing efficiency. An auto-shutdown function (1-hour inactivity) conserves battery life, critical for field operations. 3.High-Precision Measurement Phase accuracy: ≤5° error, ensuring reliable synchronization for grid interconnection. Frequency accuracy: ±0.1Hz, critical for stable power quality monitoring. Leakage current during high-voltage testing remains 

The LBQ-III Earth Leakage Circuit Breaker (ELCB) Tester is a handheld diagnostic instrument designed for evaluating the performance of residual current devices (RCDs) in electrical systems. It enables precise measurement of critical parameters, including trip current thresholds, non-trip current limits, and response times, ensuring compliance with safety standards. With its compact design, multi-range testing capabilities, and high-resolution display, the LBQ-III serves as an essential tool for field technicians and electrical engineers. Key Features 1.Portable DesignCompact dimensions (195×101×42mm) and lightweight construction facilitate on-site testing in confined spaces or remote locations. 2.Multi-System CompatibilitySupports testing of single-phase (AC220V) and three-phase (AC380V) RCDs, covering residential, commercial, and industrial applications. 3.Automated Current DetectionAutomatically identifies the exact trip current threshold across ten selectable ranges (30–1000mA), eliminating manual guesswork. 4.Direct Time MeasurementAccurately records RCD response times from 0 to 799ms with 0.5%±2-digit precision, critical for verifying time-sensitive protection mechanisms. 5.Enhanced VisibilityFeatures a 16-character blue backlit LCD for clear data readability in low-light environments. Technical Specifications 1.Input Voltage: AC220V/380V ±10% 2.Test Voltage Tolerance: ≤AC250V 3.Trip Current Ranges: 30, 50, 75, 100, 150, 200, 250, 300, 500, 1000mA (Class 1 accuracy) 4.Response Time Range: 0–799ms (±0.5% +2 digits) 5.Operating Conditions: Temperature: 0°C to 40°C Humidity:

The ZXYTM-Ⅱ Insulating Gloves/Boots Withstand Voltage Test System, developed to comply with international standards for insulating protective equipment testing, addresses the inefficiencies and safety risks of traditional testing methods. Designed for reliability and precision, this system ensures accurate evaluation of critical parameters such as leakage current, insulation aging, and power frequency withstand voltage, thereby safeguarding personnel during high-voltage electrical operations. Its modular design and advanced features make it indispensable for modern electrical safety testing. Key Performance Features 1.Efficiency and Scalability 1)Simultaneously tests 6 units (3 pairs) of insulating gloves or boots, significantly reducing testing time compared to single-unit methods. 2)Integrated multi-channel leakage current monitoring enables real-time, individual assessment of each specimen, ensuring precise identification of defective equipment. 2.Enhanced Safety Protocols 1)Automatically terminates tests upon detecting abnormal leakage currents or insulation failures, preventing catastrophic equipment damage. 2)Reinforced insulation barriers and fail-safe circuitry protect operators from accidental exposure to high voltages. 3.Mobility and Robust Construction 1)Equipped with heavy-duty casters and a compact footprint (test bench weight: 70 kg for glove testing, 45 kg for withstand voltage platform), allowing flexible deployment across laboratories or field sites. 2)Corrosion-resistant stainless steel framework ensures durability in harsh environments. 4.Customizable Testing Parameters Adjustable output voltage (0–100 kV) and capacity (0–50 kVA) accommodate diverse international standards (e.g., IEC 60903, ASTM F496). Technical Specifications Parameter Value/Range Input Voltage 220 V AC, 50 Hz Output Voltage 0–100 kV (customizable) Rated Capacity 0–50 kVA (customizable) Maximum Test Specimens 6 units per cycle Leakage Current Accuracy ±1% FS Weight 70 kg (glove test bench) 45 kg (withstand platform) Application in Electrical Safety ManagementThe ZXYTM-Ⅱ system is critical for preventive maintenance programs in substations, power plants, and industrial facilities. By rigorously validating the dielectric integrity of insulating gloves/boots, it mitigates risks associated with arc flashes, electrical shocks, and equipment failures. Its compliance with OSHA, NFPA 70E, and other regulatory frameworks ensures alignment with global safety practices. Advantages Over Conventional Methods 1)Data Logging & Reporting: Built-in RS-485/Bluetooth interfaces enable automated data recording for compliance audits. 2)Energy Efficiency: High-efficiency resonant circuit design reduces power consumption by 30% compared to linear test systems. 3)User-Centric Interface: Touchscreen controls with pre-programmed test profiles (e.g., IEC, IEEE) simplify operation for technicians.The ZXYTM-Ⅱ Insulating Gloves/Boots Withstand Voltage Test System redefines electrical safety testing through its combination of precision, adaptability, and operator protection. By streamlining compliance with international standards and enhancing testing throughput, it serves as a cornerstone for organizations prioritizing personnel safety and operational reliability in high-voltage environments. Future iterations may integrate AI-driven predictive analytics to further advance insulation lifecycle management. GDZX is a manufacturer of power testing equipment, offering a wide range of product categories with comprehensive models and providing professional technical support. Contact: +86-17396104357.Website: https://www.highvoltage-testequipment.com/

As the year draws to a close, all departments of State Grid GDZX are bustling with activity, with shipments coming in one after another. Recently, State Grid GDZX custom-built a batch of high-voltage equipment for the Thai National Grid, including the ZXJF-150/250 Partial Discharge Test System and the ZXJF-2010 Partial Discharge Tester. The equipment ordered by the client was packed and ready for shipment to Thailand on December 24, 2024. Before shipment, the relevant technical personnel of State Grid GDZX conducted on-site inspections and tests to ensure the normal operation of the equipment and instruments. After the tests were completed, the equipment was secured and packaged in a large testing workshop using specialized instruments to ensure that the equipment would not be damaged during long-distance transportation. In cooperation with HMM International Container Company, the equipment was loaded into large containers for ocean shipping.  The equipment will be transported to a mainland port and then shipped by sea to the client in Thailand. "Practical work is the fundamental principle." State Grid GDZX pays attention to every detail of its products, ensuring quality as the top priority. For every shipment, all staff strictly follow standard procedures for production, testing, debugging, and loading to ensure smooth delivery. As a professional manufacturer of power equipment, State Grid GDZX offers high-quality products, a full range of models, reliable services, and a broad customer base both domestically and internationally. We welcome cooperation and exchange with users and industry friends. For cooperation inquiries, please call: 4000-828-027. GDZX is a manufacturer of power testing equipment, offering a wide range of product categories with comprehensive models and providing professional technical support. Contact: +86-17396104357.Website: https://www.highvoltage-testequipment.com/