How to design the heat dissipation of a PLC control cabinet?

Release time:

2022-07-13

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Abstract

The PLC control cabinet is the final device in the power distribution system, primarily responsible for protecting, monitoring, and controlling the entire circuit, achieving unified management. The distribution cabinet is a device that can reasonably allocate electrical energy, making the circuit easy to switch on and off. However, since it is an electrical device, it has high safety protection requirements, and heat dissipation is an important method. Below is a brief introduction on how to meet heat dissipation requirements in the design and application of PLC control cabinets.

　　PLC control cabinetIt is the final device of the power distribution system, mainly for protecting, monitoring, and controlling the entire circuit, achieving unified management. The distribution cabinet is a device that can reasonably allocate electrical energy, making the circuit easy to switch. However, since it is a circuit device, it has high safety protection requirements, and heat dissipation is an important method. Below is a brief introduction on how to meet heat dissipation requirements in the design and application of PLC control cabinets.

When using the control cabinet, try to choose equipment with louvered vents on both sides. These centers should not be completely separated. This structure can promote air circulation and improve heat dissipation efficiency. If users operate during summer, they should avoid prolonged operation as the temperature is higher in summer, and the equipment itself will generate heat. A PLC control cabinet running for a long time will have a high temperature and may easily encounter problems.

Control cabinets are generally made of stainless steel. This information can avoid corrosion and thermal reflection. If users regularly spray insulating paint while using the PLC control cabinet, it can minimize heat radiation, resulting in better performance of the PLC control cabinet.

When using the control cabinet, users also need to maintain ventilation as much as possible. Measures should also be taken to avoid direct sunlight at noon. If it is not sandstone, a better site should be chosen. Because the ground temperature in summer is actually higher, it always radiates heat to the ground rather than to sandstone ground which radiates relatively less heat, thus reducing heat generation.

Many people can truly understand the general scale of PLC control cabinets. However, the widespread use of low-voltage distribution cabinets is surprising. It is well known that the application of PLC control cabinets is suitable for factories, mines, enterprises, shopping malls, hotels, campuses, airports, ports, hospitals, high-rise buildings, daytime areas, etc. The communication frequency is 50Hz with a rated working voltage of 380V for low-voltage power grid systems. It serves as power supply, lighting distribution, and motor control suitable for rooms. Distribution equipment is installed on inner walls and outdoor panels.

The application of control cabinets is also suitable for 50Hz communication. Fire pump control, submersible pump control, fire fan control, fan control and lighting PLC control cabinet should be for power systems below 500V. Control methods include direct start control, star-delta reduced voltage start control, autotransformer reduced voltage start control and frequency converter start control; soft start control and other methods can also use locking switches and fuse switches as locking breakpoints.

In hot climates, people's electricity consumption increases sharply. Due to overheating, the insulation of wires may burn out, emitting smells of burnt skin and plastic. This may be caused by overheating wires. Once discovered, the switch should be turned off immediately and the cause of wire overheating should be identified. In daily life, if aging or damage to circuits is found, they must be replaced in time to prevent future damage.

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