The PLC control cabinet adopts new technology, which greatly reduces the loop resistance and temperature at the connection points between the busway and the light wires on both sides, and uses high-quality insulation materials in the busway, thereby improving the efficiency of the busway and making all systems more perfect. Jiangsu Qifeng Electric Manufacturing Co., Ltd. produces PLC control cabinets. Today, Qifeng editor will take you to understand why the PLC control cabinet overheats.
Good heat dissipation characteristics of the busway: PLC control cabinet insulation materials; copper core PLC control cabinet cable sheath and jacket; it is not only an insulation layer material but also a thermal insulation material. The busway uses steam to transfer heat and releases the calorific value based on the tightly contacted steel shell. Therefore, comparing its heat dissipation characteristics with the PLC control cabinet, it can be seen from the heat dissipation characteristics of the PLC control cabinet.
In PLC control cabinet accidents, PLC control cabinet accidents caused by PLC control cabinet mechanical equipment account for more than 60% of all PLC control cabinet accidents. The perpetrators of PLC control cabinet accidents caused by PLC control cabinet mechanical equipment include: PLC control cabinets, PLC control cabinet lines, high and low voltage mechanical equipment, transformers, busways, PLC control cabinet electronic equipment, etc. Most of them are PLC control cabinet accidents caused by long-term high temperatures and multiple occurrences, leading to aging of insulation materials, resulting in short circuits and common faults.
In variable voltage PLC control cabinets, the main parameters are large, causing high-frequency oscillations, which heat the magnetic core and winding resistance. The design scheme power of the PLC control cabinet is large, but when the temperature of the PLC control cabinet reaches the design scheme temperature, the heat dissipation countermeasures cannot solve the problem. The PLC control cabinet should have good heat dissipation countermeasures. The selection of current density depends on the output power and volume: small output power has a large relative surface area and short heat transfer path, so the current density can be larger; large output power has a long heat transfer path, so the relative density of the selected power circuit should be small.
Check the welding between the PLC control cabinet and the refrigeration equipment, no oil leakage phenomenon, no abnormal vibration and discharge sound in the PLC control cabinet. The trial operation time is generally not less than 24 hours. After the PLC control cabinet trial operation is normal, gradually increase the load and run with load step by step. After 24 hours of load operation, the foundation and accessories of the PLC control cabinet are normal, and the trial operation is completed.
