Problems existing in electrical assembly and distribution: multi-strand parallel connection of outgoing line under air switch; Multi-load parallel connection of air switch upper incoming line; The wire diameter of the incoming and outgoing lines of the air switch is inconsistent; Different wire diameters are randomly combined; The use of cable color is not standard; Common wire color definition: three-phase AC: yellow/green/red; Single-phase AC red; 24V DC blue; I/O line is gray; Analog quantity white; Neutral wire light blue; PE line is yellow and green.
Problems existing in the assembly of the converter cabinet: the signal line of the drive device is suspended and has not been fixed or grounded; The layout and installation of the drive device is unreasonable. It should be separately grouped together with the incoming filter reactor. It is not suitable to adopt panel installation, but should adopt frame installation; The cable from the large drive device to the motor should not pass through the terminal transition, but should be directly led out; The motor cable shall be shielded cable, and the shielding layer shall be hooped; The layout design of the system incoming line is unreasonable, blocking the cooling air duct of the drive device; Terminals should not be used for the main incoming line, and the copper bar structure should be used to crimp the cable; The DP bus is not properly fixed and shielded, and the accessories for fixing and shielding the cable of the CU320 module are missing.
Encoder line and device communication line are suspended at will, not fixed, and encoder line is not shielded; CU320 control unit and interface module are not grounded; The transmission device is not equipped with shielding accessories, the installation position is low, and it is blocked by the trunking, resulting in the blocking of the cooling air duct, and the inlet and outlet lines of the device are unreasonable; The design of the incoming line position of the cabinet is unreasonable; The outgoing line of the main switch adopts parallel connection, which increases the contact resistance and is easy to generate heat; The design structure of the busbar is unreasonable, the incoming and outgoing lines are disordered, and the large-section lines are looped; The insulation distance between the busbar and the base plate, between the busbar and the busbar, and between the wires of each phase is not enough; The sectional area of the busbar is smaller than that of the incoming line, and a large number of holes are drilled, resulting in a further reduction of the effective sectional area, thus reducing the carrying capacity.
Wrong grounding point, no grounding effect; Not connected with system PE; The braided belt is not used for grounding, and the grounding wire cannot be circled; Not connected with system PE; The sectional area of the grounding bar is less than that of the incoming line; Too many holes in the grounding bar can reduce the sectional area; Grounding and line connection to increase grounding impedance; The base plate of the cabinet body and the frame are not grounded; No layered grounding measures are taken; Communication cable and strong current cable are laid in parallel; The shielding layer of the communication line is forced to be grounded at the insulating part. If you have any use problems, please come to our website at any time http://www.tongyuhengcheng.com consulting service