What is the ZXR-2A Transformer DC Resistance Tester ?

The ZXR-2A Transformer DC Resistance Tester represents a technological leap in electrical measurement equipment, designed to replace conventional single/double-arm bridges for resistance testing. Tailored for power industry applications, this instrument addresses critical challenges in measuring transformer windings, contact resistances, and cable connections with unprecedented speed and precision.

Key Advancements Over Traditional Bridges

1.Revolutionized Testing Speed
Unlike time-consuming bridge methods requiring manual balancing, the ZXR-2A employs a 2A switch-mode power supply and intelligent inductance compensation. This reduces measurement time by 400-500× compared to Wheatstone/Kelvin bridges, completing tests in seconds rather than minutes. The automatic arc suppression circuit enhances safety during inductive load disconnection.

2.Enhanced Accuracy & Stability
Utilizing a four-terminal measurement method and imported precision components, the device achieves 0.5% accuracy class with 1μΩ resolution - surpassing the 1-2% typical accuracy of analog bridges. Its temperature-compensated constant current source (0.002A-2A auto-ranging) maintains ±0.5% current stability across 1mΩ-2kΩ ranges.

3.Field-Adaptive Design
Contrasting with AC-dependent bridges, the ZXR-2A integrates a 12V/2.2Ah Li-ion battery supporting 6-8 hours continuous operation. The sunlight-readable quad-display (4½-digit primary + 3½-digit auxiliary) outperforms LED-based competitors in outdoor conditions. Compact 335×275×175mm dimensions and 2.8kg weight enable true portability.

Technical Superiority Breakdown

Critical Applications
• Power transformer winding resistance (YN/d connections)
• Circuit breaker contact resistance (meets IEC 62271-100)
• Cable joint resistance mapping
• Ground grid continuity testing
• Motor/generator winding analysis

Technical Specifications

1.Measurement Ranges: 6-decade coverage (1mΩ–2kΩ)

2.Current Output: 4 auto-sensing ranges (2A/0.2A/0.02A/0.002A)

3.Safety Compliance: Built-in discharge circuit for inductive loads (≤50H)

4.Data Integrity: ±(0.1% rdg + 5dgt) with temperature drift <50ppm/°C
The ZXR-2A redefines field resistance testing by combining laboratory-grade accuracy (0.5-class) with rugged portability. Its AC/DC dual power system and fast measurement capability make it indispensable for preventive maintenance in substations, wind farms, and industrial power systems. By eliminating bridge methods' operational complexities, this instrument reduces transformer testing downtime by 80% while improving repeatability to ±0.05% under field conditions - a critical advantage for condition-based maintenance programs.

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/