The ZXR-2A Transformer DC Resistance Tester is an advanced instrument designed to replace traditional single- and double-arm bridge methods for measuring DC resistance in power transformers and inductive loads. Developed for accuracy, efficiency, and field adaptability, this device addresses critical challenges in power system maintenance, offering superior performance compared to conventional approaches. Its integration of modern switching power supply technology, auto-arc-suppression capabilities, and dual AC/DC operation makes it indispensable for utilities, industrial facilities, and testing laboratories.
Key Advantages Over Traditional Bridge Methods
1.Unmatched Speed:
The ZXR-2A achieves measurement speeds hundreds of times faster than classical bridge techniques. By delivering up to 2A of adjustable constant current, it rapidly saturates transformer cores and compensates for inductance-induced current inertia. This eliminates prolonged stabilization times seen in bridge methods, reducing testing durations from hours to minutes.
2.Enhanced Accuracy & Stability:
Utilizing a four-terminal measurement method and precision constant-current output (2A to 0.002A), the device ensures ±0.5% accuracy across a broad range (1mΩ–2kΩ). This outperforms manual bridge systems, which are prone to human error and environmental interference. The inclusion of industrial-grade components and anti-interference algorithms further guarantees repeatable results.
3.Field-Ready Design:
Unlike bulky, mains-dependent bridges, the ZXR-2A integrates a 12V Li-ion battery for 2.2Ah of cordless operation. Combined with its compact form (335×275×175mm, 2.8kg), it supports effortless deployment in substations, remote sites, or confined spaces. The sunlight-readable LCD interface (4½-digit primary display) ensures clarity in outdoor conditions—a critical improvement over LED-based competitors.
4.Adaptive Measurement Ranges:
Six auto-ranging intervals (1mΩ–2kΩ) with 1μΩ resolution enable seamless transitions between low-resistance applications (e.g., contact resistance, cable joints) and transformer winding measurements. Traditional bridges require manual range adjustments and lack this versatility.
Technical Superiority in Detail
1.Dual Power Supply: Operates on AC 220V (±10%) or DC 12–16.8V, eliminating downtime in areas with unstable grids.
2.Intelligent Safety: Auto-arc-suppression protects both the operator and equipment during inductive load disconnection.
3.Energy Efficiency: ≤15W power consumption minimizes operational costs compared to energy-intensive bridge systems.
4.Environmental Resilience: Functions reliably in 0–40°C and ≤85% RH conditions, ideal for harsh utility environments.
Industry Applications
The ZXR-2A excels in:
1.Transformer Testing: Diagnosing winding deformations, loose connections, or tap changer issues.
2.Contact Resistance Measurement: Assessing switchgear, circuit breakers, and busbar joints.
3.Cable & Grounding System Evaluation: Detecting degradation in power cables or grounding grid interfaces.
The ZXR-2A Transformer DC Resistance Tester redefines efficiency and reliability for resistance measurement tasks in power systems. By merging laboratory-grade precision with rugged portability, it resolves the limitations of legacy bridge methods while aligning with modern demands for rapid, error-free diagnostics. For utilities prioritizing reduced downtime, enhanced worker safety, and data-driven asset management, this instrument represents a transformative investment in power infrastructure resilience.
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/
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