The measurement current of contact resistance of circuit breaker and disconnector should not be less than 100A DC to ensure the accuracy of test results.

Loop resistance tester is designed according to the latest power execution standard DL/T845.4-2004 of the People's Republic of China. It combines high frequency switching power supply technology with digital circuit technology. It is suitable for measuring circuit resistance of switching control equipment. The test current is 100A recommended by the national standard. The circuit resistance can be measured directly under the condition of current 100A and can be displayed digitally. The instrument has accurate measurement and stable performance. It meets the requirements of field maintenance of high-voltage switch in power and power supply departments and circuit resistance test in high-voltage switch factory.

测量范围：1～1999μΩ

分力：1μΩ

Display mode: current: three and a half LCD

Resistor: Three-and-a-half LCD

Working power supply: AC220V + 10% 50Hz

Working Environment: Temperature - 10 ~40 C Humidity: <80% RH

Volume: 300 x 270 x 200 mm3

Weight: 5kg (excluding accessories)

High current: With the latest power supply technology, it can continuously output high current for a long time, overcome the shortcomings of instantaneous current of pulse power supply, effectively break down the oxide film of switch contacts, and get good test results.

Strong anti-interference ability: Under severe interference conditions, the last bit data of LCD screen can be stabilized in the range of +1 word, the reading is stable, and the repeatability is good.

Long service life: All high precision resistors are used to effectively eliminate the influence of ambient temperature on the measurement results, and the use of military connectors enhances the anti-vibration performance.

Easy to carry: small size, light weight.