How Can I Efficiently Manage Heat Inside Switchboards?

Oriental Motor Fair

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  The Oriental Motor Fair has finally begun.

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  I'm in charge of the fan section, so I'm going to make sure that I will explain everything well.

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  Hello and welcome.

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  Um, I have a question about how to use the fans. I'm currently designing a switchboard, and I'm wondering how to install a fans to efficiently manage the heat inside the switchboard.

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  Yes. Generally, hot air flows up and cold air flows down, so installing a fan to exhaust air from the top will generally lower the temperature more efficiently. For example, I think it's a good idea to put the exhaust fan high up on the switchboard and install either an air intake vent or an intake fan on the lower side. [Figure 1]

  

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  I see.

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  Also, have you heard about this product, the AM2-XA1 thermostat?

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  No, I've never heard of a thermostat. What kind of product is it?

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  This switch allows you to automatically control operation and stopping of the fan in response to temperature changes inside the switchboard.

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  Wow, how do you use it?

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  Install inside the switchboard. They are DIN rail mounting models, which makes it easy to install on DIN rails. Then you just connect a thermostat between the fan and the power supply. [Figure 2]
  All you have to do is to set the dial on the front.

  

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  This blue dial, right? It says 0 °C to 60 °C.

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  For example, if you set this dial to 40 °C, the thermostat will trigger and the fan will turn ON when the temperature inside the distribution board exceeds 40 °C (± 5 °C). When the fans lowers the temperature inside the switchboard below "Operating Temperature -4 °C" (± 3 °C), the thermostat turns OFF and the fan stops. The fan rotates only when its needed, which reduces both noise and energy consumption.

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  It's convenient to be able to control the temperature without having to do complicated controls.
  Does each fan need its own thermostat?

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  The number of units that can be connected depends on the series and size of the fan. For example, depending on the size, anywhere from 1~5 of the large high air flow MRS Series can be connected together, while up to 9 of the small flat MU Series can be connected together. You can check the number of units that can be connected together in the general catalog. Also, as I mentioned earlier, the temperature inside distribution boards tends to be higher at the top and lower at the bottom, so I recommend installing the thermostat near the top of the distribution board.

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  I see. So, the location of installation is also important. I'll check it out as soon as I can.

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  Thank you very much. Please let me know if there is anything else I can help you with.

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  How was it? Did you explain it well?

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  He asked how to efficiently manage heat inside the switchboards and seemed interested when I talked about fan mounting position and thermostats.

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  Did you explain that the best fan to use depends on the mounting conditions inside the distribution board?

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  What do you mean?

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  For example, air flow tends to stagnate when lots of control devices are installed and mounting density is high, so a large fan with high static pressure fan would be the best. For axial flow fans, the MRS or MRE Series would work, and for centrifugal blowers, the MBS Series would be suitable. [Figure 3]

  

  On the other hand, air flows easily when there are few control devices and mounting density is low, so even a small fan would work for cooling. For axial flow fans, the MU Series would be ideal because of their large air flow capacity. [Figure 4]

  

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  I see. So that's one way they can be used. I'll speak with the customer immediately about that.