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What is ZXR-1A Transformer DC Resistance Tester: Features, Applications
The ZXR-1A Transformer DC Resistance Tester is a high-precision instrument designed to replace traditional single and double-arm DC bridges. Engineered for efficiency and accuracy, this device addresses critical challenges in measuring DC resistance of inductive loads such as power transformers, low-voltage switch contacts, and cable joints. With its advanced design and robust performance, the ZXR-1A has become an indispensable tool in the power industry for ensuring equipment reliability and operational safety.
Key Features
1.Rapid Testing Capability
Utilizing a 1A output charging current, the ZXR-1A accelerates the saturation of inductive loads (e.g., transformer cores), significantly reducing measurement time. It outperforms conventional bridge methods by hundreds of times, making it ideal for time-sensitive field applications.
2.High Accuracy and Stability
The tester employs a four-terminal measurement method combined with a constant current source to ensure stable current output during testing. This design minimizes interference from inductance and external factors, achieving a measurement accuracy of 0.5% with a resolution of 1μΩ.
3.User-Friendly Design
Dual LCD displays: A 4.5-digit LCD shows resistance values, while a 3.5-digit LCD displays ambient temperature or test current.
Auto-arc-suppression functionality enhances safety during operation.
Compact and portable (2.8 kg) with built-in rechargeable batteries (12V DC), supporting both AC/DC power for field flexibility.
4.Wide Measurement Range
The instrument covers six ranges:
1mΩ–20mΩ, 20–200mΩ, 0.2–2Ω,
2–20Ω, 20–200Ω, and 200Ω–2kΩ,
with adaptive constant current outputs (1A, 0.1A, 0.01A, 0.001A) to optimize accuracy across varying resistances.
Technical Specifications
Parameter | Details |
Operating Environment | 0°C–40°C, ≤85% RH |
Measurement Accuracy | 0.5% ±1μΩ |
Current Output Ranges | 1A (1μΩ–2Ω), 0.1A (2Ω–20Ω), 0.01A (20Ω–200Ω), 0.001A (200Ω–2kΩ) |
Power Supply | 11–14V DC (built-in battery) or 220V AC |
Dimensions | 335×275×175 mm |
Applications in the Power Industry
1.Transformer Testing
Accurately measures DC winding resistance to detect issues like loose connections, shorted turns, or degradation in transformer cores.
2.Switchgear and Circuit Breakers
Evaluates contact resistance in low-voltage switches to ensure proper conductivity and reduce energy loss.
3.Cable and Joint Inspections
Identifies high-resistance faults in power cables or welded joints, preventing overheating and potential failures.
Advantages Over Traditional Methods
1.Speed: Reduces testing time from hours (with bridges) to minutes.
2.Portability: Eliminates reliance on lab-based equipment for field diagnostics.
3.Reliability: Stable performance in harsh environments due to anti-interference circuitry.
4.Cost Efficiency: Low power consumption (≤15W) and reduced maintenance needs.
The ZXR-1A Transformer DC Resistance Tester redefines efficiency in electrical testing by combining cutting-edge technology with practical design. Its ability to deliver rapid, precise measurements across diverse applications—from substations to industrial sites—makes it a vital asset for power engineers and technicians. By replacing outdated bridge methods, this instrument not only enhances workflow but also contributes to the long-term reliability of power systems.
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/
