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Detection and Judgment of Wire Beam Line Fault

Posted On:2017-08-11 10:29:54

1) Detection and Judgment of Wire Blast Fault
Blast burns occur all of a sudden, and they burn very quickly. In burned lines, there is generally no safety device. The law of wire beam burning is: In the circuit of the power supply system, where the iron is attached, the wire beam is burned to where it is burned, and the junction of the burned and intact parts can be considered to be iron. If the wire beam is burned to the wiring part of an electrical device, it indicates that the electrical equipment is malfunctioning.
2) Detection and Judgment of Short Circuit, Broken Road and Contact Bad Fault between Lines
-External extrusion and impact of the wire harness, resulting in damage to the insulation layer of the wire in the wire beam, resulting in short circuits between the wires, causing some electrical equipment to lose control and fuse. When judging, the electrical equipment and the control switch at both ends of the wire beam connector can be opened, with electric meter or test light to detect the short circuit of the line.
-In addition to the obvious fault phenomenon, the common fault occurs between the wire and the wire terminal. After some wires are cut off, the outer insulation layer and the conductor terminal are intact, but the conductor inner core wire and conductor terminal have been cut off. When judging, the tension test can be done on the lead wire and the wire terminal that is suspected to have broken the road. During the tension test, if the insulating layer of the wire gradually tapers, it can be confirmed that the wire has broken the road.
-Poor line contact, mostly in the socket. When the failure occurs, the electrical equipment will not work properly. When judging, turn on the electric device power, touch or pull the electric device's relevant plug in, when touching a plug in the electric device, the electric device's work is normal and abnormal, indicating that the plug is malfunctioning. Replacement of electronic harness assemblies
1. Appearance check
1) The new electronic wire beam model should be the same as the original model. The wire terminals and wires are reliably connected. There is no loosening or shedding of the plugs and wires.
2) Compare the new electron beam with the original electron beam, such as: the size of the electron beam, the wire terminal connector, the color of the wire, etc.. In case of doubt, a multimeter can be used to test and confirm that the wire beam is intact before replacement.
2. Installation of wire beams
The plugs, plugs and sockets of each electrical equipment shall correspond to the sockets and plugs on the electronic wire harness. After each connection wire is connected to the electrical equipment, there should be a certain margin, the wire should not be too tight or too loose.
3. Inspection and connection test of the line
1) Inspection of the line
After the replacement of the electronic wire beam, first check whether the connection between the electronic wire beam socket and the electrical equipment is correct, and whether the positive and negative terminals of the battery are correctly connected.
2) Electricity test
The iron wire of the battery can be temporarily disconnected. A light bulb of about 12V and 20W is used as a test light. The test light is connected in series between the negative electrode of the battery and the iron end of the frame, and all electric equipment switches on the car are closed. The normal test light should not be on, otherwise it indicates a fault in the circuit. When the circuit is normal, remove the light bulb and use a fuse with a capacity of 30A to be connected between the negative pole of the battery and the iron end of the frame. Do not start the engine, and connect the power supply of various electric equipment on the vehicle one by one. Electrical equipment and line inspection, After confirming that the electrical equipment and lines are not malfunctioning, remove the fuse and connect the battery to the iron wire.
Detection of wire bundles
The standard of the wire beam is mainly calculated by calculating its compression rate. The calculation of the compression rate requires special instruments. The line beam section standard tester developed by Suzhououqia Optical Instrument Factory is specifically used to detect whether the wire beam is pressed. The most effective tester. It is mainly done by cutting, grinding, corrosion, observation, measurement, and calculation. It takes only 5 minutes to complete the entire operation.



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