What is ZXR-5A DC Resistance Tester? A Technical Comparison for Power Industry Applications

The ZXR-5A DC Resistance Tester is a cutting-edge instrument designed for precise measurement of low-resistance values in inductive components such as power transformers and mutual inductors. This article explores its technical features, performance advantages, and industry-specific benefits, with comparisons to conventional resistance testing methods.

Key Features and Technical Advancements

1.Microprocessor Control & User Interface
Unlike traditional manual testers requiring complex calibration, the ZXR-5A employs a microcontroller and a backlit LCD with Chinese/English interfaces. This eliminates guesswork and reduces human error—a significant upgrade over analog instruments that rely on operator expertise.

2.Four-Terminal (Kelvin) Measurement
Conventional two-terminal testers often suffer from lead resistance interference. The ZXR-5A’s four-terminal method ensures accurate readings by isolating voltage and current paths, achieving resolutions as fine as 1μΩ. In contrast, older models typically offer resolutions no better than 0.1Ω.

3.Linear Current Compensation
The device dynamically adjusts output currents (5A to 0.005A) across six ranges (0–2000Ω), maintaining stability even under fluctuating loads. This contrasts with fixed-current testers, which struggle with measurement drift in low-resistance scenarios.

4.Safety and Portability
Equipped with anti-back-EMF protection and lightweight (3kg) design, the ZXR-5A addresses two critical pain points in field testing:

Safety: Older testers risk damage from inductive kickback in transformer windings.

Mobility: Bulkier predecessors (often >10kg) hinder on-site efficiency.

5.Efficiency Metrics
With ≤30W power consumption and rapid measurement cycles, the ZXR-5A outperforms legacy systems requiring external power supplies and prolonged stabilization times.

Technical Comparison Table

 Industry Applications
The ZXR-5A excels in critical power industry tasks where precision and safety are non-negotiable:

1.Transformer Commissioning: Detects winding deformities and contact issues faster than bridge methods.

2.Preventive Maintenance: Identifies resistance drift in CT/PT windings with sub-milliohm sensitivity.

3.Fault Diagnosis: Resolves grounding grid corrosion assessments without disassembly, unlike clamp-on testers limited to >1Ω ranges.
The ZXR-5A DC Resistance Tester redefines efficiency and reliability in low-resistance measurement. By integrating microprocessor-driven automation, advanced Kelvin sensing, and field-ready ruggedness, it addresses the limitations of older technologies while aligning with modern power systems’ demands for accuracy, safety, and operational agility. For utilities and testing teams seeking to minimize downtime and maximize data integrity, this instrument represents a measurable leap forward.

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/