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Loop Resistance Testeralso called contact resistance tester, or switch loop resistance tester, mainly used to detect the contact (loop) resistance of high-voltage switches, and can also be used for high-precision measurement of DC resistance of cable lines, as well as situations requiring large current and micro resistance measurement.
Taking high-voltage switches as an example, in layman's terms, the loop resistance tester is used to detect whether the closing condition of high-voltage switches is good or bad. The performance of high-voltage switches also affects the normal operation of the entire power system, so detecting the loop resistance of high-voltage switches in power work is also a very important testing task.
Loop resistance testers include various specifications and models such as manual testing instruments and automatic testing instruments. Taking the automatic loop resistance tester as an example, it is actually an intelligent fully automatic loop resistance tester. It is made with advanced high-power switching power supply technology and advanced electronic circuits. It is a special testing instrument for high and low voltage switches, cables and wires, and weld contact resistance. Its current adopts the 100A DC recommended by the national standard GB736, and the resistance value of the tested object can be measured under the condition of 100A current.
The loop (contact) resistance tester has the characteristics of small size, light weight, strong anti-interference ability, high precision, convenient operation, and complete protection functions. The instrument adopts new switching power supply technology, can continuously output large current for a long time, overcomes the shortcomings of instantaneous current of pulse power supply, can effectively break down the oxide film of switch contacts, and obtain good test results.
Strong anti-interference ability: under severe interference conditions, the last digit of the LCD screen can be stable within the range of ±1 digit, with stable readings and good repeatability. Long service life of loop resistance tester: all high-precision resistors are used, effectively eliminating the influence of ambient temperature on measurement results, and the use of connectors enhances vibration resistance.
In addition to the above advantages, the automatic loop resistance tester also has storage and printing functions, can transmit test data and print test data on site, and the instrument has very stable test performance and high test accuracy.
Loop resistance tester is mainly a special testing instrument used to detect the contact resistance of high and low voltage switches, cables and wires, and welds. It is also often called switch loop resistance tester, contact loop resistance tester, contact resistance tester, contact (loop) resistance tester, etc.
Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.
