VINDA-100A High-Current Contact Resistance Tester – 100A Micro-Ohm Meter for Circuit Breakers

Product Details：

The VINDA-100A is a high-precision, digital instrument designed for the accurate measurement of contact resistance in high-voltage switchgear and other applications requiring micro-resistance testing. Engineered with advanced high-frequency switching power supply technology and dual-channel 16-bit Sigma-Delta AD sampling, this device delivers exceptional stability and resolution down to 0.01μΩ.

Unlike traditional pulse-power testers, the VINDA-100A provides a continuous DC output of 50A or 100A, effectively penetrating oxide films on switch contacts to ensure reliable data. It features a user-friendly LCD interface, USB data storage, and customizable testing durations (up to 599 seconds), making it an ideal tool for power supply departments, maintenance teams, and switchgear manufacturers.

Key Features

High Current & Stability: Utilizes switching power supply technology to output continuous DC 100A (or 50A), overcoming the limitations of pulse power supplies and ensuring accurate readings by breaking through contact oxidation.

Ultra-High Precision: Features a resolution of 0.01μΩ and an accuracy of ±(0.5% rd + 2d). The dual-channel high-speed sampling ensures data stability even in interfering environments.

Intelligent Operation: Equipped with a high-performance CPU that automatically adjusts ranges based on signal size. Includes over-temperature protection to automatically cut off current if the device overheats.

Customizable Testing: Users can freely select between 50A and 100A test currents and set the testing duration from 5 to 599 seconds, far exceeding standard requirements.

Data Management: Features a large LCD screen for clear data visualization. Measurement data can be saved internally (up to 200 records), printed via a built-in printer, or exported via USB for PC analysis.

Robust Design: Key components are imported, featuring temperature compensation circuits to eliminate environmental impact and military-grade connectors for enhanced vibration resistance.

Technical Specifications

Parameter Specification

Model VINDA-100A

Measurement Range 0 ~ 2999.9 μΩ

Resolution 0.01 μΩ (099.99 μΩ); 0.1 μΩ (100.02999.9 μΩ)

Test Current DC 50A / 100A (Fixed Output)

Measurement Accuracy ±(0.5% rd + 2d)

Test Duration 5s ~ 599s (Adjustable)

Display Large Screen LCD (Chinese/English)

Data Storage 200 Records

Communication USB Interface (for U-disk data transfer)

Power Supply AC 220V ± 10%, 50Hz

Power Consumption 1200W

Operating Environment Temperature: -10℃ ~ 40℃; Humidity: ≤80% RH

Dimensions 380 × 300 × 260 mm

Weight Portable design (Compact)

Applications

High Voltage Switchgear: Testing contact resistance of circuit breakers and disconnect switches.

Preventive Maintenance: Routine testing for power supply departments and substations.

Manufacturing: Quality control for high-voltage switchgear factories.

General Use: Any scenario requiring high-current, low-resistance (micro-ohm) measurement.

Compliance Standards

DL/T845.4—2004: General technical conditions for resistance measuring devices.

DL/T596—1996: Preventive test code for electric power equipment.

JJG1052—2009: Verification regulation for loop resistance testers.

DL/T967—2005: Verification regulation for loop resistance testers and DC resistance testers.