Knife switch and air switch comparison
Knife switch and air switch is widely used. Whether in engineering, or in daily life, both of which are very common in the electrical products. Recently on the Internet to see some claim, that the air switch can completely replace the knife switch, this view has existed for a long time. This paper is aimed at this point, put forward some own views. The main is the comparative analysis of knife switch and air switch difference and different.
First is the simple introduction of the two. On the knife switch is not excessive elaborate, many articles have described in detail, the company's products HD series single throw knife switch and HS double throw knife switch has a very detailed introduction. Speak a little air switch, although there is a switch word, but it is actually a kind of low voltage circuit breaker. Said to be more precise, it is one kind has the protection function of miniature circuit breaker. At the same time to realize the overload, leakage grounding functions. As is common in DZ47-63 miniature circuit breaker.
To understand the air switch can completely replace the knife switch, you need to understand the difference between the two and their respective advantages. In order to make a judgment. Air switch and knife switch, although can play short circuit protection function. But look from the function: air switch can automatically trip, do not need to replace the fuse, overload ability is stronger, can reduce the arc hazards. Therefore, by contrast, the use is more convenient, security is relatively high. Especially in the safety performance and the use, many people now choose the air switch, which is a lot of people think that it can completely replace the knife switch reason.
But the fact is that we also need to consider some other aspects. For example the most intuitive, price issue, since air switch has a variety of advantages, coupled with the elegant appearance, the price relative to the knife switch can high many, so in all places are widely used, is not so reliable. Again, although the air switch with high safety, but it is also compared with the knife switch bare appearance and the presence of autoantibodies in some inborn deficiency of. But in fact, the knife switch or advantages: we all know that it has a obvious segmentation points, electrical personnel can easily find fault. But for air switch, because there is no apparent segmentation points, even if the switch is broken, it is unable to see, so there is a certain risk. There is a knife switch can be used for the current large compared to the line, and the air switch is generally the segmented current is relatively small, but not all so, such as DZ20 molded case switch section capacity can reach more than 2000A.
The information above in electrical switch factory provides reference materials ( www.jiandq.com )