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WR.20A Winding Resistance Tester

The WR.20A is a precision DC resistance tester designed for accurate measurement of transformer winding resistance and other inductive components. With high resolution, robust build quality, and extended data storage, it is suitable for use in industrial environments, workshops, and quality control labs. Its versatile output current ranges and compact design make it a reliable tool for both field and laboratory applications.

Key Features

  • High accuracy and resolution (0.1 μΩ) for precise winding resistance measurement

  • Durable construction designed for industrial use

  • Stores up to 1000 test results for quality control and analysis

  • Wide test current range up to 20A for flexible applications

  • Suitable for transformer winding resistance and DC resistance tests

  • Lightweight accessory kit for portability

  • Backed by a 1-year warranty

Technical Specifications

Output Current

  • <20mA

  • 1A

  • 2.5A

  • 5A

  • 10A

  • 20A

Test Range

  • 100 μΩ – 1Ω (20A)

  • 500 μΩ – 2Ω (10A)

  • 1 mΩ – 4Ω (5A)

  • 2 mΩ – 8Ω (2.5A)

  • 5 mΩ – 20Ω (1A)

Accuracy

  • ±(0.2% + 2 readings) for 10Ω – 20kΩ (<20mA)

  • ±(0.5% + 2 readings)

Resolution

  • 0.1 μΩ

Data Storage

  • 1000 groups

Working Conditions

  • Temperature: 0℃ – 40℃

  • Ambient Humidity: ≤90%RH (non-condensed)

Power Supply

  • AC 220V ±10V, 50Hz ±1Hz

  • Fuse: 5A

Max Consumption

  • 500W

Dimensions

  • Host: 405 × 230 × 355 mm

  • Accessories: 360 × 260 × 180 mm

Weight

  • Host: 15 kg

  • Accessories: 5.5 kg

Test Line

  • Standard length: 13m (customizable)

Standard Accessories

  • WR.20A Tester – 1

  • 220V Power Wire – 1

  • Test Lead Set (10m) – 1

  • Ground Wire – 1

  • Fuse (3A) – 5

  • Instruction Manual – 1

  • Factory Test Report – 1

  • USB-Serial Wire – 1

  • Accessory Case – 1

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