Eaton Freedom 2100 Installation And Maintenance Manual

Contents

- Page 2 -I.B. 8926-1THE MOTOR CONTROL CENTERAlthough the Cutler Hammer Freedom 2100 Motor Con-trol Center may be joined to existing Five Star, Series2100, and Advantage installations using the same splicebar kits common to both. Units designed for the Free-dom 21 00 can be mounted in Five Star Series and Se-ries 21 00 sections, but the opposite is not recommended,because Five Star and Series 21 00 units may lack ter-minal blocks and sufficient interrupting capacity. TheFreedom 2100 MCC may be joined to existing Cutler-Hammer Freedom Unitrol and Fl 0 Unitrol MCC’s with aspecial splice bar kit, but units are not interchangable.CONTROL CENTER NOMENCLATUREThe numbers shown in parentheses in the following textrefer to the balloon legends in Figure 2.The Cutler Hammer Freedom 21 00 Motor Control Centerconsists of one or more totally enclosed, dead front, freestanding structural assemblies (1 7) 90 inches high whichare compartmentalized to house individual control units.(2) With control units mounted in the front side only, thestructure may be 16 or 2l inches deep. For mountingunits back-to-back, the structure is 21 inches deep. Steelcovers (7) enclose the structure at the top, sides and atthe rear of front-mounted-only structures.Each control center contains a main horizontal bus sys-tem (9) mounted at the top and extending across thelength of the control center.A vertical bus system (8) installed in each vertical sec-tion is connected to the horizontal bus to feed the indi-vidual control units. (6) The vertical bus is isolated by afull height barrier. (14) An optional labyrinth barrier pro-vides both isolation and insulation. An automatic shut-ter is included with the labyrinth barrier system to coverthe stab openings for each control unit.At the top of each section, a door provides ready accessto the top horizontal wireway (11) and ground bus (10).The horizontal wireway is isolated from the bus systemsby steel barriers (12) which can be removed for installa-tion and maintenance operations. Adequate space isprovided for control wiring and top cable entry.At the bottom of each section, a door (18) provides readyaccess to the bottom horizontal wireway, (19) and neu-tral bus (if provided). The bottom of each section is com-pletely open to provide unrestricted bottom entry of ca-ble and conduit. Channel sills may be installed acrossthe bottom of the control center if specified, and an op-tional bottom plate may also be specified.A vertical wireway 8 inches deep, (16) extending the full90 inch height of the control center is located to the rightof each unit compartment. This wireway is covered bytwo hinged doors (15) and contains cable supports tosecure wire bundles and cables. The vertical wirewayjoins the horizontal wireway at top and bottom to pro-vide unobstructed space for interwiring.Each vertical section provides space to mount up to sixcontroller units (2) with a minimum height of 12 inches,in increments of six inches, for a total of 72 inches ofusable space. Controllers through NEMA Size 5 aredrawout type (except reduced-voltage starters). Thesedrawout unit assemblies are a completely self-containedpackage consisting of a steel enclosure, operating han-dle and electrical components. The drawout assemblyslides into its compartment on guide rails (1 3) to pro-vide easy withdrawal and reinsertion andto ensure pre-cise alignment of the unit stabs with the vertical bus.Each drawout unit is held in place by a single quarter-turn latch (3) which can only be engaged when the unitstabs are fully mated with the vertical bus. Each unithas a separate door, (1) held closed by a minimum oftwo quarter-turn fasteners.The operating handle on the controller unit (4) movesvertically. In the ON or TRIPPED positions, the handleinterlocks with the unit door to prevent its opening. Inthis position, authorized personnel can open the door byturning the defeater mechanism screw. (21)With the unitdoor open and the operating handle in the ON position,another interlock to the divider pan prevents removal ofthe unit. This same interlock prevents insertion of theunit unless the handle mechanism is in the OFF posi-tion. To ensure that units are not energized accidentallyor by unauthorized personnel, the handle mechanismcan be padlocked in the OFF position.Part 1GENERAL INFORMATIONFig. 1 Nameplate