What is fuse type isolating switch
Recently there is a customer wants us to give him a recommendation for their own sites on which the isolation switch, which requires disconnecting 250A current, but also the size of the box constraints. We have compared the price, size and other factors, finally gave him recommended a fuse type isolating switch - HR6 fuse type isolating switch. But customers to fuse type isolating switch is not very understanding, we have the patience to answer, but then consider some time ago, someone asked fuse type isolating switch and the isolating switch on what was different. So I according to my own experience, at the same time sorting out some information on the web, it simply say what is fuse type isolating switch.
We know, generally isolating switch main role is to disconnect the current small, change operation mode. Do not know if you noticed, which is disconnected from the small current, that is the question. When the current reaches a certain extent, may to the isolating switch for isolating parts damaged, thereby causing the switch can not be used. It is considered that, in order to be able to disconnect the current, more main is in the face of the current to the isolating switch protection, the need to provide a fuse ( equivalent to fuse ) to protect them, and thus the isolation switch is known as fuse type isolating switch.
The more professional, can be defined: a fuse type isolating switch needs to satisfy the following three points:
1 through the use of a fuse protection switch
2 in a normal circuit conditions ( including the specified overload ) can be switched on, bear and break the current, and in terms of the non normal circuit conditions ( such as short circuit ), within a specified time, capable of carrying current isolation switch
3 on a circuit capable of providing safety isolation, when in the opening position to ensure that the circuit breaking and ensure safety work
Then add some information about fuse type isolating switch points. Generally speaking, this type of isolation switch is mainly used for the conventional line, protective effect. Generally not as a motor to open and close, because motor in starting and stopping the breakdown current is too large, very easily lead to fuse type isolating switch failure. Again, even for the same section of the switch, when the switch rated thermal current at the same time, matched the fuse body are not the same, for example the article mentioned the HR6 fuse type isolating switch. When the rated current of 100A, selection of fuse-links for NT00, and when the electric current is 250A, the selected fuse shall be NT1. For this, we choose fuse type isolating switch, you need to pay more attention, more than and combining with their own situation to choose the right type, so as to avoid unnecessary trouble.
The above information of electrical switchgear plant collection, www.guofadq.com 15957745520