Product Introduction

The LDHL-200A High-Voltage Switching Circuit Resistance Tester is designed in accordance with the People's Republic of China's electric power execution standard DL/T845.4-2004, integrating high-frequency switching power supply technology with digital circuit technology. The LDHL-200A High-Voltage Switching Circuit Resistance Tester is suitable for measuring contact resistance of switching control equipment. It employs a test current of 100A DC, as recommended by the national standard. Contact resistance can be directly measured at 100A DC, with test results displayed on a large LCD screen. It also features data storage, output printing, and time setting functions. An additional 50A range is available for user selection. The high-voltage switching contact resistance tester offers accurate measurement, stable performance, and meets the requirements of power and supply departments for on-site high-voltage switch maintenance and circuit resistance testing instruments in high-voltage switch factories.

Product Alias: Contact Resistance Tester, Switching Circuit Resistance Tester, Contact Loop Resistance Tester, Resistance Loop Tester, Intelligent Loop Resistance Tester, Contact Resistance Meter, Contact (Loop) Resistance Tester, Loop Resistance Tester

Product Features

(1) High Current: The high-voltage switch contact resistance tester utilizes advanced switch power supply technology, capable of continuously outputting high currents for extended periods. It overcomes the drawbacks of pulsed power sources' instantaneous current, effectively piercing the oxidation film on switch contacts for superior test results.

(2) High Stability: Under severe interference conditions, the data behind the liquid crystal display can remain stable within ±1 character, with consistent readings and good repeatability.

(3) High Precision: Utilizing dual-channel high-speed 16-bit Σ-Δ AD sampling and advanced digital signal processing technology, the resolution reaches 0.01μΩ. It is currently the most stable high-voltage switch contact resistance tester in China that can achieve a resolution of 0.01μΩ, surpassing imported micro-ohmmeters.

(4) Intelligent: Utilizing imported high-performance CPUs, the system automatically switches the measurement range based on signal size during testing, ensuring the accuracy of this product's tests. Over-temperature protection circuitry automatically stops output current when the instrument exceeds the set temperature, ensuring safe operation of the instrument.

(5) High Quality: All critical components are imported, and the influence of environmental temperature on measurement results is effectively eliminated by the cleverly designed temperature compensation circuit. The use of military-grade connectors enhances vibration resistance.

(6) Powerful Functionality: Current can be freely selected between 50A and 100A, and test time can be set任意 within 5s to 599s. This overcomes the shortcomings of other similar instruments that cannot set measurement time or have too short continuous working time, far exceeding the performance of other similar instruments.

(7) User-friendly Interface: The high-voltage switch contact resistance tester allows for easy data input via a scroll mouse, enabling quick operation. Users can independently set the instrument's date and time, save measurement data in real-time, and print results immediately.

(8) Multiple Communication Methods: Capable of communicating with a computer via RS232 serial port (9 pins) or USB data cable, uploading measurement data to the computer for further analysis and processing by the test personnel.

(9) The High-Voltage Switch Contact Resistance Tester is easy to use: compact, lightweight, and portable.