When electrical instrument workers (especially maintenance electricians, instrument workers, etc.) perform control panel wiring, troubleshooting, and maintenance, the most indispensable thing is the line number tube.
In the process of wiring electrical instruments, wire tubes are an indispensable and important component. Mature wiring technology is certainly inseparable from wire number tubes, but in actual application, many people do not pay attention to it, resulting in irregular wiring, which brings trouble to troubleshooting and maintenance.
Common knowledge about wire number tubes: Do you understand the direction of wire number tubes?
The number tube is also called the line number tube. It can be said with certainty that there is a certain direction for extracting the number tube.
1. The correct direction of the number tube
1. When the number tube is oriented horizontally or placed on both sides of the terminal block, the text direction of the number tube is read from left to right.
2. When the number tube is oriented vertically or placed on the upper and lower sides of the terminal block, the text direction of the number tube is read from bottom to top.
3. As shown in the figure:
When the number tube is at different angles, the text direction depends on the phase angle.
For example: when the casing direction is at angle 1 or 3, the text direction is read from bottom to top.
For example: when the casing direction is at angle 2 or 4, the text direction is read from top to bottom.
2. Correct use of number management
1. When the terminal blocks or electrical equipment are of different sizes and unevenly arranged, the number tubes should be aligned with each other and arranged in rows.
2. When the wires are connected individually at the terminal, the number tube should be close to the side of the terminal.
3. When wires are connected in rows on terminals or electrical equipment, and when the size of the terminal block or electrical components is the same, the number tube should be close to the terminal side.
3. The function of wire number tube
1. During the wiring process of electrical instruments, a wire number tube is required. The wire number or equipment circuit number will be clearly marked on the wire number tube, which allows electrical maintenance personnel to quickly and accurately understand where the line comes from during maintenance. , where to go.
2. For formal wiring, the wire number pipes and the wire numbers on the drawing are in one-to-one correspondence, and the electrical cabinet is fully equipped and all the wires are tied tightly. If there are no wire numbers, it will greatly increase the difficulty and time of troubleshooting.
I believe that many electrical instrument maintenance masters know that in complex electrical and instrument control systems, the role of wire tubes is almost irreplaceable and very important.