This paper mainly discusses some problems about load isolation switch installation. Earlier encounter products HGL series load isolation switch cabinet installation need schematic, later in the installation process, there are some small problems, so here is a little summary, hope for those in the installation load isolation switch problems can have certain help and inspiration.

We know, load isolation switch can pass off the load current, but not breaking short circuit current, short circuit fault is have the aid of and its series fuse protection. Load isolation switch and the isolating switch with the same apparent disconnect interval, so it can also play a role in isolated power supply. This and another common switch knife switch is not the same.

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 to closure, a main blade after closed; when opening a main blade disconnect, disconnected after auxiliary blade.

( 2) separate switch, the blade open distance should be consistent with the manufacturing plant, such as not up to the requirements, can change the operating rod in a fan-shaped plate in position, or adjust the length of the pull rod.

( 3) in the switching of the main blade has a small plug, closing should be just inserted into the arc extinguishing device of spray 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 in accordance with design, installation of fuse tube should be tightly into the jaw.

Personally think that, third point and fourth point in particular need attention, can avoid many unnecessary trouble. Of course, and any of a class of product installation, installation load isolation switch problems far more than these, but generally only in accordance with the operation process, is not a big problem.