The drawout mounting means the moving portion can be racked out for inspection or swap without disturbing the fixed cradle — a practical advantage when you're keeping a mill line running and need to swap a chassis between scheduled outages rather than during a crash.
Deployment context
The drawout form factor suits switchboard and MCC lineups where the chassis slides into a fixed cradle with primary disconnect stabs. In a pulp-and-paper environment, that means you can isolate and withdraw the chassis for contact inspection or replacement without de-energizing the entire bus — keeps the rest of the machine running while you service one feeder.