AOC and PS
Complete switchgear consists of closed cabinets or blocks (partially or completely), in which protection and automation devices are built.
Depending on what method of installation of devices and apparatus is used in these devices for voltages from 6 to 10 kV, they are divided into: PS and AOC.
The difference between PS and AOC is that in PS the equipment is mounted on a roll-out trolley and withdrawable elements, and in AOC - without withdrawable elements with partial fencing; AOC chambers are designed for one-sided service, while cabinets of PS are designed for two-sided and one-sided.