The group DC resistance test of portable short-circuit grounding wire is used to assess whether the contact between the nose and busbar clamp of the portable short-circuit grounding wire and the multi-stranded copper flexible wire is good. At the same time, it is also possible to assess whether the cross-sectional area of multi-purpose steel flexible wires meets the requirements. Taking a combination grounding wire as an example, its measurement wiring is
The group DC resistance test is measured using the DC voltage drop method. The commonly used measurement method is the current voltmeter method, and the test current should be ≥ 30A When conducting a group DC resistance test on the grounding wire, the length between each terminal nose should be measured in pairs. Based on the measured DC resistance value, the resistance value per meter should be calculated. If the value meets the requirements of Table 2, it is considered qualified
Portable Short Circuit Grounding Wire Test Report Test Items
The test is based on DL/T879-2004 "Portable Grounding and Grounding Short Circuit Devices for Live Working" and DL408-91 "Electric Power Safety Work Regulations"
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