In the power industry, precise measurement of contact resistance in high-voltage (HV) and low-voltage (LV) switches, as well as critical components like HV cables, is essential to ensure operational safety and efficiency. Traditional resistance testing methods often struggle to balance speed, accuracy, and portability. The next-generation DC Resistance Tester addresses these challenges with cutting-edge technology, offering unparalleled performance for modern electrical infrastructure diagnostics.
Key Innovations
1.High-Current Precision Testing
Equipped with a configurable output current of up to 200A, this tester enables rapid and accurate micro-ohm-level measurements (resolution: 0.1µΩ) across a wide range of applications. Multi-stage current selection (200A, 150A, 100A, 50A) ensures adaptability to diverse scenarios, from substation circuit breakers to distribution panel contacts. The extended measurement range (up to 10mΩ at 50A) accommodates both low-resistance components and degraded systems requiring detailed analysis.
2.Enhanced Field Efficiency
Powered by a high-capacity lithium battery, the device supports 500+ consecutive tests on a single charge, eliminating dependency on external power sources. Its compact design (220×168×65mm, 1.6kg) and rugged construction make it ideal for field technicians. The 4.3-inch industrial-grade LCD remains visible even under direct sunlight, ensuring reliable data interpretation in harsh environments.
3.Intelligent Safety and Data Management
Integrated safety mechanisms, including open-circuit protection and thermal overload safeguards, prioritize user and equipment protection during high-current operations. For data documentation, the tester supports dual storage modes—local memory and USB drives—alongside seamless compatibility with external printers. This feature streamlines compliance reporting and historical trend analysis for maintenance teams.
4.Customizable Testing Protocols
Users can select measurement durations from "Fast" mode to 60-second cycles, optimizing workflows for preventive maintenance or fault diagnostics. The auto-shutdown function conserves energy after 5 minutes of inactivity, extending operational readiness.
Technical Superiority
1)Accuracy: ±(0.5% of reading +1µΩ) ensures compliance with IEEE and IEC standards for electrical testing.
2)Versatility: Covers applications from HV switchgear contact degradation assessment to LV busbar joint inspections.
3)Eco-Friendly Design: The 12.6V lithium battery reduces carbon footprint compared to conventional diesel-generator-powered systems.
Industry Impact
By minimizing downtime through rapid testing and enabling predictive maintenance strategies, this instrument enhances grid reliability. For example, a 200A test on a 800µΩ circuit breaker contact can detect resistance deviations as low as 4.1µΩ (within 0.5% error margin), identifying early-stage oxidation or loosening before catastrophic failures occur.
As power networks evolve toward higher capacities and smarter infrastructure, the demand for precision diagnostic tools grows exponentially. This DC Resistance Tester sets a new benchmark by combining laboratory-grade accuracy with field-portable robustness, empowering utilities to achieve safer, more efficient asset management in the era of renewable energy integration and grid digitalization.
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/
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