Load isolation switch installation precautions project
We know, load isolation switch to off load current, but not breaking short circuit current, short circuit fault is have the aid of and its series fuse protection. Load isolation switch circuit and the isolation switch is as visible disconnecting gap, so it can also play a role in isolated power. This and the other kinds of commonly used switch knife switch is not the same as.
The first simply introduces the isolation switch structure:
1 -2-3- on insulator spindle rod insulator under4-5- frame
6 - high voltage fuse7 to touch8 - movable contact9 - arc moving contact
10 - arcing contact (with a static contact )11- the main static contact 12- contact seat
13 - opening spring 14- insulation pull rod15 - heat release
In general, load isolation switch isolation switch installation and installation of roughly the same, but in the regulation of time, pay attention to the following points:
(1) load isolation switch of the main blade and the auxiliary blade action sequence should be: closing the auxiliary blade is first closed, a main blade after closed; when opening the main blade disconnect, disconnected after auxiliary blade.
(2) separate switch, the blade open distance should be consistent with the manufacturing plant requirements, such as not up to the requirements, can change the operating rod in a fan-shaped board position, or adjust the length of the pull rod.
(3) in the switching of the main blade has a small plug, switch should be just inserted into the arc extinguishing device of nozzle. Operation when the nozzle should not fierce collision, otherwise should handle.
(4) if the installation of the load switch with fuse, before installation should check the fuse current rating is according to the design, installation of fuse tube should be closely inserted into the jaw.
The information above in electrical switch factory provide for reference only, ( www.jiandq.com )