These are the cells that does not require secondary protection, of which rated current is up to 630 A and of which short circuit strength is up to 20 kA, and which do not allow switching under load.

3 polar and 3 position (open-closed-grounding rod) SF6 gas insulated separators are used in these cells as a standard.

Load separator input cells are mainly used at energy inputs of OG distribution busbars, and might also be used on line outputs in some applications.