ZX-BZK Tester: Accuracy and Efficiency of Field Diagnosis

Transformer short-circuit impedance testing is a critical diagnostic procedure to assess winding integrity after mechanical stress or short-circuit events. Traditional methods often require complex setups, external power sources, and manual calculations, leading to inefficiencies in field applications. The ZX-BZK Transformer Short-Circuit Impedance Tester addresses these challenges with advanced automation, accuracy, and portability, setting a new benchmark for on-site diagnostics compared to conventional systems.

Key Advantages Over Conventional Methods

Integrated Power Supply vs. External Sources
Unlike traditional setups that rely on external AC power supplies or cumbersome CT/PT configurations, the ZX-BZK features an internal adjustable power source (0–250V, 0–10A). This eliminates dependency on auxiliary equipment, simplifies cabling, and reduces setup time by 60–70%, particularly for 110kV+ transformers.

Single-Phase Measurement for Three-Phase Efficiency
Conventional three-phase testing often demands sequential measurements across all phases, increasing labor and time. The ZX-BZK employs a single-phase methodology, requiring only three automated tests to compute impedance, reactance, and inductance for all phases. This reduces testing cycles by 50% while ensuring phase-specific accuracy (0.5% for impedance at COSφ >0.1).

Enhanced Accuracy with Synchronized Sampling
Legacy systems struggle with phase synchronization errors in noisy environments. The ZX-BZK utilizes phase-locked loop (PLL) technology to synchronize voltage/current sampling, achieving 0.2% precision for voltage (3–300V) and current (0.2–20A). This outperforms typical field instruments limited to 0.5–1.0% accuracy under similar conditions.

Comprehensive Data Management
While traditional approaches rely on handwritten logs or disconnected software, the ZX-BZK integrates data storage (post-short-circuit comparisons), a built-in printer, and PC-compatible exports. This ensures traceability and supports trend analysis—critical for compliance with the ≤2% impedance deviation threshold post-fault.

Technical Superiority in Harsh Environments

Wide Operational Range: Operates at -10°C to 50°C and 0–80% humidity, surpassing many competitors’ 0–40°C limits.

Sunlight-Readable Display: A high-contrast LCD ensures visibility in direct sunlight, unlike standard industrial displays requiring shading.

Portability: At 5kg and 360×220×150mm, it is 30–40% lighter than legacy systems, enabling rapid deployment.

Case Study: Field Application
In a 2023 grid substation audit, the ZX-BZK identified a 1.8% impedance shift in a 132kV transformer post-fault—within the 2% safety margin—using three automated tests in 20 minutes. Traditional methods would have required 45+ minutes with external CTs and manual calculations.
The ZX-BZK Transformer Short-Circuit Impedance Tester redefines field diagnostics by merging laboratory-grade accuracy (0.2% voltage/current, 0.5% impedance) with rugged portability. Its integrated power supply, automated phase analysis, and data-centric design resolve long-standing inefficiencies in traditional methods, making it indispensable for ensuring transformer reliability in modern power networks.

GDZX is a manufacturer of power detection equipment, offering a diverse range of products with comprehensive models and providing professional technical support. Contact us at +86-27-6552607 or +86-17396104357.Website: http://en.gdzxdl.com/