1、 Daily preventive testing and hidden danger investigation

Mining cables are exposed to harsh environments such as humidity, dust, strong vibration, and corrosive gases for a long time, and need to bear high-frequency start stop loads of large equipment such as mining and transportation. The insulation layer is prone to hidden defects such as aging, moisture, and mechanical damage. The cable fault tester can periodically inspect the insulation status of underground power cables, ground control cables, and communication cables through insulation resistance testing, partial discharge detection, and other functions before any obvious faults occur in the cables. In response to the frequent dragging and wear of mobile cables in mining workfaces, as well as the sealing failure of underground junction boxes and other weak links, the testing instrument can accurately capture early signals such as decreased insulation resistance and abnormal partial discharge, and lock in the location of hidden dangers in advance (such as cable joints, bent sections, and equipment connections), providing targeted maintenance basis for operation and maintenance personnel, and avoiding hidden defects from developing into sudden failures.

2、 Accurate positioning and diagnosis of fault types

When faults such as open circuit, short circuit, grounding, or high resistance leakage occur in mining cables, the cable fault tester can quickly identify the type of fault and locate its location, solving the problem of complex cable wiring in mines (multiple along tunnels, buried or suspended) and hidden fault points. For low resistance short circuits or open circuit faults caused by cable being crushed by mining cars or roof falling rocks, the low-voltage pulse method can directly obtain the distance between the fault point and the testing end; In response to high resistance faults caused by cable insulation aging and breakdown, as well as oil pollution, high-voltage flashover or DC high-voltage methods can be used to excite discharge at the fault point and capture pulse signals, accurately locating the fault location. For example, if the power supply cable of an underground tunneling machine breaks internally due to frequent movement, the tester can locate the point of the break within minutes, avoiding the waste of time caused by blind troubleshooting by operation and maintenance personnel.

3、 Special scenario cable fault handling support

Some cables in mines need to be adapted to special working conditions, and cable fault testers can specifically meet the fault detection needs of such scenarios. In the underground explosion-proof area, the intrinsic safety design of the tester (some models) can be combined with explosion-proof testing accessories to detect the insulation integrity and fault points of explosion-proof cables without violating safety regulations; For flexible cables from mobile substations in mining areas to coal mining machines, frequent bending can easily cause internal conductor breakage or insulation fatigue damage. The tester can compare multiple pulse tests to determine whether the fault is dynamic damage (such as poor contact during bending). In addition, for low-level faults in mining communication cables (such as dispatch telephones and monitoring signal cables), the audio sensing function of the tester can quickly locate the points of disconnection or poor contact, ensuring stable signal transmission for mining dispatch command and safety monitoring systems.

4、 Verification and review after fault repair

After the cable fault is repaired, the cable fault tester needs to verify the quality of the repair to ensure that the fault is completely eliminated. Operation and maintenance personnel can retest the insulation resistance and withstand voltage performance of repair points and surrounding cable segments through testing instruments, check the quality of joint crimping or the reliability of insulation wrapping, and avoid fault recurrence caused by incomplete repair. At the same time, by combining the fault data recorded by the tester (such as fault type, location, and insulation parameter changes), the fault patterns of mining cables can be analyzed through retrospective analysis. For example, if the cable faults in a certain mining area are concentrated in humid areas, targeted improvement measures such as cable insulation enhancement and waterproof sealing can be taken to enhance the overall operational reliability of mining cables.