Drawout MCC Enclosures

In a motor control system, the cost of downtime / shutdown is a primary factor that needs to be accounted for. When a single feeder fault causes the entire lineup of other feeders to go off-line at the same time, that means that the panel design has failed in real-world terms. Our Drawout MCC Enclosures provide a way to isolate any feeder (or feeders) for isolation and replacement while the main bus and any of the other motors remain energized and running.

With respect to how we design the compartment structure, it is designed for exact alignment for ease in cavity movements along with positive power contact engagements. We implement mechanical interlock systems so that the unit can only be moved from an OFF condition, and the door cannot be opened while it is in a connected position. The Shutter systems will automatically cover the busbar opening when a module has been withdrawn, thus keeping the section secure during maintenance activities.

Cable termination compartment & drawout path are distinguishable so on site wiring does not impede unit removal; all modules have unique identification, facilities for testing, and means to remove control plug without disrupting adjacent feeders. When determining feeder density and ventilation path, heat rises in vertical section must also be taken into account.

Routine inspections include mechanical operation of racking system, contact resistance measuring and interlocking. These Drawout (Crazy) MCC Enclosures supplied as part of contractor's project will meet project requirements for: fast feeder replacement, minimal disruption to production and safe access for routine maintenance on high-capacity motor controls in anywhere throughout United States.