With these years of work experience, electrical complete sets can also be said to be a "regrettable job". No perfect electrical cabinet has ever been made. Every time it is completed, there are always plenty of areas for improvement. This may be the driving force for our continuous improvement, but no matter what the level of our current set is, there is a principle I am willing to share with you, that is, "the realization of function first, reliability and durability second, conducive to maintenance third, convenient The fourth place is processing, and the fifth place is beautiful and tidy.†The first three points are the most important, and the last two points sometimes need to be compromised. After all, everything will be subject to cost factors.
It is also based on this principle to make comments. According to our habit, we only talk about areas that we feel are obviously insufficient. It does not necessarily mean that there is no problem. It may be omitted, or it may not be important. Of course, it is better to be okay. Discuss with you the wiring installation of the electrical complete cabinet.
01
Figure one
Problems with the complete set of cabinets in the above picture:
1. The design of the main incoming line is unreasonable, unsightly, and unsafe. The upper and lower spaces left for the incoming switch are too cramped. There is no spacer installed between the incoming and outgoing wires of the air switch, and there is a large gap between the cable and the terminal. It is recommended to use copper bar structure for cable entry, and install door handles for air switch.
2. The layout is not very reasonable, the strong current surrounds the weak current, the grounding measures are not good, and the interference is more difficult to solve.
02
Figure II
Problems in the complete set of electrical cabinets in the picture above:
1. For the same problem as in Figure 1, the wiring is a bit messy.
2. It feels that the overall wire diameter is too small, especially the ground wire diameter.
3. The main incoming circuit breaker has no auxiliary contact input to the CU, and no main contactor controlled by the CU to control the main power supply of the drive.
4. The shielding layer of the motor cable and encoder cable has not been repeatedly grounded.
Photo reference for complete sets of electrical cabinet examples
(Some pictures are provided by netizens)
Main incoming line of electrical cabinetâ–¼
Busbar structureâ–¼
Door handle and small branch distribution structureâ–¼
Small busbar structureâ–¼
DC24V power supply, busbar structureâ–¼
Wiring processing of power supplyâ–¼
PLC wiring processingâ–¼
Wiring treatment of the inverterâ–¼
Main ground of the cabinet â–¼
Terminal and cable hoop appear â–¼
Fast wiring module complete cabinet â–¼
Simotion complete cabinet â–¼
to sum up
1. A good cabinet is designed, standardized, and designed. It must be clearly and correctly implemented on the drawings to allow the complete set of processors to make them. The design engineer should not complain that the following complete sets of processors are not completed, but first Check whether you have designed the drawings well.
2. The design engineer should do a good job of communicating with the complete set of processing parties, especially the new drawings. The first place is to install and install it. It is best to visit the site in person to see if the actual layout is in line with the design, listen to the suggestions of the on-site workers, and avoid working behind closed doors. , Sometimes the drawings look pleasing to the eye, but the layout is unreasonable, and even makes the wiring difficult. At this time, the suggestions of experienced workers are of great reference value. It is necessary to listen to the suggestions in time and make changes as soon as possible. Remember Don't just let it go, and don't just go it alone without repentance.
3. To form a complete set of processing technology and specifications that suits you, develop a good habit of complete set processing and construction according to drawings, and distinguish between permissions and responsibilities. The design engineer is responsible for the wrong drawings, and the processing party who does not make the complete set according to the drawings is responsible.
4. Strict factory inspection and acceptance system, strict acceptance according to the drawing, and rework if it does not match the drawing.
5. Summarize the experience and lessons of design and complete processing in time every time, and leave summary minutes for reference and improvement of similar designs next time.
6. Even in the process of processing the complete set, the design engineer should go to the workshop more if possible, care about the complete set of electrical cabinet being processed by himself, and communicate more with the complete set of processing party on site:
Master the progress of production and processing;
Find and solve the problems encountered in actual production or some detailed handling problems in time (especially when the wire duct cover has not been covered);
If possible, take more photos of the electrical cabinet at different stages of processing, and leave the picture materials for reference and improvement in subsequent design comparison analysis.
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DC Power Cord, power cable, DC cable, power connector
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