This is a chassis for retractable 3-pole ComPact NS and Masterpact NT circuit breakers as well as load break switches. This enclosure is suitable for the withdrawal of ComPact NS 630b-1250 N/H circuit breakers. It is also suitable for the withdrawal of ComPact NS 630-1250 NA load break switches. Additionally, it is compatible with the withdrawal of Masterpact NT 06-10 H1/H2 circuit breakers and Masterpact 06-12 HA load break switches. This multifunctional enclosure is particularly designed for incoming devices. It allows for the connection and disconnection of the device through a door using a crank that can be stored within the enclosure. It indicates three positions of the device (on, test, and disconnected), which can be displayed locally via a position indicator or remotely via a slide switch. It enables the switching on and off of circuit breakers through the front panel of a switchboard. There are several extensive locking options for the chassis. A misalignment protection feature ensures that a circuit breaker can only be installed in an enclosure with compatible characteristics. This enclosure is suitable for 3-pole devices.