Should a low-voltage switchgear be a drawer cabinet or a GGD cabinet?
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Everyone is talking about drawer cabinets and their various advantages. I haven’t used one yet, but why do I still feel that fixed cabinets are better? The design institute now recommends drawer cabinets, but I’m not sure how to choose. 1. Are there multiple circuits in the drawer cabinet? The GGD cabinets are placed on both the front and back sides; the cabinet dimensions are 800*800*2200, and it is possible to accommodate 8*2=16 circuits. 2. The frequency converters I’m using now almost all have the problem of overheating, especially those with high power; doesn’t using a drawer cabinet cause even more overheating? 3. There are many interlocks between drawer cabinets. Based on the interlock system of the high-voltage cabinet I’m using now, problems may arise over time; I’m not sure how high the likelihood of such problems is. Is the probability of a plugin failing high? 4. The cost of all components in one GGD3 cabinet is approximately 40,000 to 50,000. I don’t know how much drawer cabinets cost. The design institute says that domestically produced ones are not reliable; only those made by joint ventures can guarantee quality. Also, are the bus coupler devices and automatic switching devices connected using plugs as well? What do you all think? I want to learn * it.
1. Personally, I prefer drawer cabinets, as it’s convenient in case of power outages – one drawer cabinet per device； 2. Why does the drawer cabinet equipped with an inverter get hot? Theoretically and in practice, the current flowing from the drawer cabinet to the inverter decreases after the inverter is installed, as the inverter has a capacitive compensation function; of course, the level of harmonics may increase. 3. It is precisely because the drawer cabinet has an interlock function that many of the protective electrical components required for equipment protection are unnecessary – otherwise, it would be necessary to install distribution boxes on-site to provide protection for the equipment
First of all, you need to know that for the GCS cabinet of the An frequency converter, only the cabinet shell is used, so heat dissipation is not affected.
Some of the drawer cabinets we used before have been completely replaced with GGD cabinets due to heating issues with their plug sections. One should not focus only on the advantages; the disadvantages must also be taken into account. For electrical systems, it is crucial to ensure long-term safe operation~~
I’m really torn about this. There are dozens of cabinets in my new power distribution room, and I’m worried that the drawer-type cabinets might develop problems after a few years of use; it’s a dilemma for me.
It can’t be said that drawer cabinets can’t be used either. It depends on the occasion. When we used it back then, each isolation plug was selected according to its rated current. Moreover, the old power distribution room has poor sealing, a high level of dust inside, and severely oxidized isolation plugs, which are the reasons for the heating. If you want to use it, it’s simple: increase the rated current of the isolation plug by one level. For example, if 100A is required, one can choose a 160A version. The distribution room is fully sealed, free from dust, corrosive gases, and the like. The machining accuracy of cabinets has improved. This way, it’s no problem to use the drawer cabinet again.
I’m not really a fan of drawer cabinets; so you’re not going to modify them? For example, whether to add more circuits – GGD is more convenient, and it’s also easier for inspections.
The quality of some domestic drawer cabinets is not very good; it’s better to use GGD cabinets instead.
For civilian use, drawer cabinets will do; as for chemical applications, it’s better to avoid them – the environment there is simply too poor
The greatest advantages of drawer cabinets are: 1) they are easy to maintain without affecting other circuits; 2) they have high interchangeability, allowing for replacement in emergency situations; 3) they feature a modular design; 4) they have a high degree of integration. As for reducing the failure rate, it is necessary to ensure strict quality control during manufacturing and to pay attention to environmental hygiene at the site of use. The performance of these cabinets results from effective coordination across all aspects, and any issue can affect their performance. Drawer cabinets still have more advantages over GGDs. It is a trend of development. The key is to do it well! Use it well!