80459-641-01, Rev. 09

De-Energizing Equipment and Identifying Unit Type

Identify whether the unit intended for modification is a removable style or a fixed position unit. All removable units have stab connections to the vertical bus as shown on the electrical schematics and one-line diagrams provided with the MCC. Most removable units also have a twin handle cam mechanism (see Pulling the Twin Handle Cam Mechanism Forward). One notable exception is the Compac™ 6 control unit (see Operator Handle in the OFF Position), which is removable but does not have the twin handle cam mechanism.

NOTE: Modifications to arc-rated MCC units or structures can adversely affect the arc containment features and/or performance. Modifications to control circuit wiring are allowed. Modifications specifically covered in this instruction bulletin are allowed. However, additional components, changes to the power circuit, or mechanical modifications to the unit saddle or MCC exteriors must be approved by Schneider Electric. Contact your local Schneider Electric representative for more information.

If the unit is removable, follow the instructions below. If the unit is a fixed position unit, follow the instructions for Modifying Fixed Units below.

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