Busbar issues in reduction furnaces
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Dear seniors, regarding the power distribution from the power control cabinet to the reduction furnace, since the direct current level is relatively high, using cables would require very thick cables, which makes it difficult to specify and install them. The initial investment plus installation costs are not much different from those involved in using busbars for power distribution; therefore, I think it would be better to use busbars for this purpose. However, the area from the power control cabinet to the reduction furnace is a hazardous zone; using cast busbars would result in excessive investment ； If low-voltage dense busbars are used, the intermediate connectors must meet explosion-proof requirements. Upon consultation, it turns out that there are very few manufacturers (or none at all) of such connectors that possess the necessary explosion-proof certification, so this is a rather troublesome issue. I’m not sure if copper bars with an external insulating sheath could be used? Is there a regulatory basis? Are there any other solutions? Thank you!
Some manufacturers use bare busbars, while others cover them with an insulating layer; however, the specific standards are not known
No way. As far as I know, the polysilicon produced recently all uses busbars~ but I’m not sure exactly how they do it~~
It seems there are no rules now; as long as it’s safe, that’s enough! It’s better to use a cable; it might be a bit more expensive……
I saw that busbars were being used. Just exposed like that
To put it bluntly, shouldn’t the room have positive pressure ventilation? Wouldn’t that be very dangerous? Note: GB50058-92 is not suitable for the hydrogen production industry; there are certain prerequisites for this. For example, the bare busbars used in hydrogen production are generally installed at a lower level than the hydrogen production equipment (such as in cable trenches). Since hydrogen is lighter than air, using bare busbars poses no major problems. But in polysilicon, especially during the reduction process, some hazardous substances are heavier than air while others are lighter; does using bare busbars result in lower safety levels? Is positive pressure ventilation necessary indoors? Are there any other methods? Thank you all!