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20A 10A DC Resistance Tester for Transformer Testing

Categories Resistance Tester
Brand Name: HKVTest
Model Number: 10A/20A
Place of Origin: wuhan
MOQ: 1
Payment Terms: T/T
Supply Ability: 100000
Delivery Time: within 3 days
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20A 10A DC Resistance Tester for Transformer Testing

Overview

The DC resistance tester is an essential tool for testing inductive coils such as power transformers, mutual inductors, reactors, and electromagnetic operating mechanisms during manufacturing, factory inspections, installation, major repairs, post-tap-changer adjustments, acceptance tests, and preventive tests in the power sector. It can inspect the welding quality of winding joints, detect inter-turn short circuits, verify the proper contact of tap-changer positions, check if the actual tap position matches the indicated position, identify broken leads, and detect broken strands in multi-strand windings. The instrument features a compact size, lightweight, high output current, excellent repeatability, strong anti-interference capability, and comprehensive protection functions. The device is equipped with an ARM high-integration core and includes automatic discharge and discharge alarm functions. With high testing accuracy and simple operation, it enables rapid measurement of transformer DC resistance.

Features
  • The instrument is controlled by a high-speed microcontroller, offering high automation and ease of operation.
  • It adopts advanced power technology with a wide measurement range.
  • Comprehensive protection functions reliably safeguard against back EMF impacts, ensuring higher reliability.
  • Fast response, stable measurement data, and automatic data refresh during testing.
  • Intelligent power management technology ensures the instrument operates at minimal power, reducing internal heat generation and saving energy.
  • Built-in non-volatile clock.
  • Equipped with non-volatile memory for permanent data storage.
Measurement Range
Current RangeMeasurement Range (Resistance)
<5mA30Ω–50KΩ
100mA500mΩ–80Ω
300mA100mΩ–25Ω
1A50mΩ–8Ω
5A1mΩ–0.4Ω
10A0.5mΩ–200mΩ
Technical Specifications
ParameterDescription
Output CurrentAuto, 10A, 5A, 1A, 300mA, 100mA, <5mA
Resolution0.1μΩ
Accuracy0.2%
Open-Circuit Voltage2.5V (for 5A/10A range); battery voltage (for other ranges)
Output Power25W
Operating Temperature0–40°C
Operating Humidity<90%RH, non-condensing
Dimensions230mm (Length) × 155mm (Width) × 60mm (Height)
Weight1.2kg
ItemQuantity
DC Resistance Tester Host1 unit
10A Test Leads1 set
Charger (DC12.6V/2A)1 unit
Standard Resistor1 unit
Protective Backpack1 unit
User Manual1 copy
Certificate of Compliance1 copy
Factory Calibration Table1 copy
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