High Voltage Switchgear Factory Circuit Resistance Test | Circuit Resistance Tester

At present, the conventional QJ44 double arm DC bridge is widely used in the power system to measure contact resistance, but the testing current of this type of bridge is only m level, making it difficult to detect the defect of reduced cross-sectional area of the circuit conductor. When measuring the contact resistance of the conductive circuit of a high-voltage switch, due to the influence of the oil film and oxide layer between the contacts, the measured value is several times larger and cannot truly reflect the contact resistance value. For this purpose, the standard DL/T845.4-2004 "General Technical Conditions for Resistance Measuring Devices: Loop Resistance Testers" and the new version of the verification regulation JJG1052-2009 "Verification Regulation for Loop Resistance Testers and Direct Resistance Testers" of the Ministry of Electric Power stipulate that the measurement current for measuring (isolating) switches, circuit breakers and other contact resistances should not be less than 100A DC, and the minimum current maintenance time should not be less than 60 seconds to ensure accurate test results. The operation panel of this instrument adopts ergonomic design, conforms to operating habits, uses high-frequency switching power supply and digital circuit technology, and is suitable for measuring the circuit resistance of switch control equipment. The test current adopts the national standard recommended DC 100A. The circuit resistance can be directly measured under DC 100A, and the test results are displayed on a large LCD screen with functions such as data storage, output printing, and time setting. There is also a 50A gear for users to choose from; Custom testing time, with a maximum setting time of 599 seconds, far exceeding the standard requirement of 60 seconds; it is the most stable contact resistance tester in China that can achieve a resolution of 0.01 μ Ω, surpassing the performance of imported high current micro ohmmeters. Compliant with on-site high-voltage switch maintenance and high-voltage management by the power and supply departmentsSwitch factory circuit resistance testThe requirements.

High Voltage Switchgear Factory Circuit Resistance Test | Circuit Resistance TesterSuitable for high-precision measurement of high and low voltage switch contact (circuit) resistance and cable line DC resistance values, and also applicable to other occasions that require high current and micro resistance measurement.