The switch characteristic tester is widely used in the performance evaluation and maintenance of power system switchgear, and its core application scenarios are as follows:1. Production and factory inspection of high-voltage switchgearQuality control: Mechanical characteristic parameters (such as op

1、 Preparation before useEquipment appearance and oil level inspectionClean the surface dirt of the transformer, check if the oil tank leaks oil, and confirm that the oil level is within the normal range. If the oil level is insufficient, it is necessary to replenish the standard No. 25 transformer

1. Precise low resistance measurementSpecially designed for measuring small resistors in the range of 1 μ Ω~1 Ω (conventional multimeters have insufficient accuracy)2. Typical applications:Contact resistance of switch/relay contacts (＜ 100 μ Ω)• Solder joint/connector conductivity resistance

1. Ground ResistanceDefinition: The total resistance between the grounding device and the earth, reflecting the ability of current to diffuse from the grounding body to the surrounding soil.Measurement principle: By injecting a test current (usually AC, to avoid polarization effects) into the ground