PLC control cabinets are the final stage of equipment in a power distribution system. They primarily protect, monitor, and control the entire circuit, facilitating unified management. A power distribution cabinet is a device that rationally distributes electrical energy and facilitates easy circuit switching. However, as it is a circuit device, it has high requirements for safety protection. Heat dissipation is one of the most important methods. This article briefly introduces how to meet heat dissipation requirements in the design and application of PLC control cabinets.
When using a PLC control cabinet, it is advisable to choose a device with louvers on both sides. The center should not be completely separated. This structure promotes air circulation and enhances heat dissipation. If using it in summer, users should avoid prolonged operation, as the high temperatures in summer, combined with the heat generated by the equipment itself, will cause the PLC control cabinet to reach extremely high temperatures, potentially leading to malfunctions.
The cabinet of a PLC control cabinet is generally made of stainless steel. This material can prevent corrosion and heat reflection. If users regularly spray insulating varnish on the PLC control cabinet, heat radiation can be reduced as much as possible, and the effect of using the PLC control cabinet will be even better.
When using a PLC control cabinet, users also need to ensure adequate ventilation. They should also take steps to avoid direct midday sun. If the ground is not sandstone, the chosen location is even better, as the ground temperature is actually higher in summer, and heat is always radiated to the ground, unlike the heat generated by sandstone. The relatively small surface area can reduce heat generation.
Many people are familiar with the general application of PLC control cabinets. However, the widespread use of low-voltage distribution cabinets is surprising. As we all know, PLC control cabinets are suitable for factories, mines, enterprises, shopping malls, hotels, schools, airports, ports, hospitals, high-rise buildings, residential areas, and other similar settings, operating on AC 50Hz and rated at AC 380V low-voltage power grid systems. They are also suitable for power, lighting, and motor control in rooms, installed on interior walls and exterior floors.
The application of PLC control cabinets is also suitable for AC 50Hz. Fire pump control, submersible pump control, fire fan control, ventilation fan control, and lighting PLC control cabinets all use power systems with voltages below 500V. Control methods include direct start control, star-delta reduced voltage start control, autotransformer reduced voltage start control, and frequency converters. Start control, soft start control, and other control methods can also use disconnect switches and fuse switches as isolation points.
In hot weather, electricity consumption increases dramatically. Overheating can burn the insulation of electrical wires, producing a foul odor of burning plastic and charred wires. This situation is likely caused by overheating of the wires. If this is discovered, the switch should be turned off immediately, and the cause of the overheating should be investigated. In daily life, if aging or damaged wiring is found, it is necessary to replace it promptly to prevent future damage.
To avoid problems with PLC control cabinets during hot summer weather, it is necessary to regularly inspect the electrical wiring of homes or equipment and eliminate potential hazards promptly. During installation and construction, it is essential to avoid scratches, abrasions, and impacts to conductors and insulation. Pay attention to the strength of wire joints and the sturdiness of insulation tape. In areas with high humidity, high temperatures, or corrosive substances, it is forbidden to lay insulated wires outdoors. Use conduit for wiring. In dusty areas, regularly clean wiring and insulation boards to prevent oil contamination. Do not haphazardly run wires. When installing wiring, select wires with appropriate cross-sections based on the load of the electrical equipment. Regularly check fuses and select suitable fuses; do not arbitrarily adjust fuses, let alone replace fuses with aluminum or copper wire. Regularly check that all connections on the wiring are secure and reliable; flammable materials must not be placed near the wiring integrator. PLC control cabinets greatly assist us in providing these facilities.
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