Allen-Bradley CENTERLINE Instruction Manual
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Allen-Bradley CENTERLINE Instruction Manual

Allen-Bradley CENTERLINE Instruction Manual

Low voltage motor control centers
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Summary of Contents for Allen-Bradley CENTERLINE

  • Page 1 ® CENTERLINE Low Voltage Motor Control Centers Instruction Manual...
  • Page 2 Solid state equipment has operational characteristics differing from those of Important User Information electromechanical equipment. Safety Guidelines for the Application, Installation and Maintenance of Solid State Controls (Publication SGI-1.1 available from your local Rockwell Automation sales office or online at http://www.ab.com/manuals/gi) describes some important differences between solid state equipment and hard-wired electromechanical devices.

  • Page 3: Table Of Contents

    Table of Contents Important User Information ....Inside Front Cover Table of Contents Preface Recommended Publications ........v Purchased Components and Additional Instruction Sheets .
  • Page 4 Chapter 4 Installing Conduit......... 4-1 Installing Conduit and Cable Bottom Entry Conduit .
  • Page 5 Chapter 9 Maintenance Checklist ........9-1 Maintenance Disconnect Switch and Contact Lubrication .
  • Page 6 Publication 2100-IN012B-EN-P - April 2005...

  • Page 7: Preface

    Arc-Resistant Low Voltage Motor Control Center Designs 2100-AP003x-EN-P Power Factor Correction Capacitors for Bulletin 2100 Motor 2100-AT001x-EN-P Control Center Starter Units ® 2100-AT002x-EN-P Arc Flash Protection Marking Guide for CENTERLINE Motor Control Centers ® 2100-IN010x-EN-P CENTERLINE Motor Control Centers - Joining and Splicing...
  • Page 8 Publication 2100-IN012B-EN-P - April 2005...

  • Page 9: General Information

    (plug-in) or frame mounted (hard-wired) units. CENTERLINE Motor Control Centers are designed in standard widths of 20” (508 mm), 25” (635 mm), 30” (762 mm), 35” (789 mm) and 40” (1016 mm).

  • Page 10: Nameplate Data

    General Information Each MCC section has a nameplate located on the enclosure or vertical Nameplate Data wireway door. See Figure 1.1., section nameplate information includes: • Catalog Number / Serial Number • Series Letter of Section • Bus Bar Voltage and Current Rating •...

  • Page 11: Motor Control Center Sequence Numbering

    General Information CENTERLINE Motor Control Centers are designed so functionality is not Motor Control Center affected by the section installation order, i.e. vertical section numbering Sequence Numbering sequence order. All MCC sections carry a serial plate which identifies vertical section sequence numbering, e.g.

  • Page 12: Ul/Csa Marking

    General Information CENTERLINE Motor Control Centers (MCCs) are listed by Underwriter’s UL/CSA Marking Laboratories, Inc. (UL), Standard for Safety UL 845 and certified by the Canadian Standards Associate (CSA), Standard C22-2, No. 14. Due to standards harmonization, a motor control center may also carry the cUL designation.
  • Page 13 General Information Motor control center units that are UL listed and/or CSA/cUL certified will carry a short circuit rating label located on the bottom plate of plug-in units or on interior right-hand side plate of frame mounted units. See Figure 1.6. Figure 1.6 Short Circuit Label for Units Publication 2100-IN012B-EN-P - April 2005...

  • Page 14: Series Number And Series Id As Manufactured In The U.s

    General Information Series Number and Series ID as Manufactured in the Read Tables 1.A through 1.D BEFORE adding new U.S. ATTENTION sections or units to an existing CENTERLINE Motor Control Center. Table 1.A Sections Sections Series Scope Description of Change...
  • Page 15 General Information Table 1.B 2100 Units 2100 Units Series Scope Description of Change Date Implemented Letter in U.S. — Original design February 1971 All sizes Changed terminal blocks November 1976 All sizes Changed handle mechanism to Cutler-Hammer/Westinghouse MCPs June 1979 Size 5 Changed from ITE to A-B 400A disconnect April 1981...
  • Page 16 General Information Table 1.C 2400 Units 2400 Units Series Scope Description of Change Date Implemented Letter in U.S. — Original design June 1990 18A, 24A, 30A Changed to Series B, Bulletin 194R, 30A disconnect March 1992 18A, 24A, 30A Changed to three Bulletin 800E pilot devices on 0.5 space factor units July 1992 All sizes New disconnect external auxiliary contacts and new 600A-1200A circuit breaker operating mechanism...

  • Page 17: Series Lettering - Units & Sections

    General Information When using sections in conjunction with units of different series letters, Series Lettering - Units & consult the MCC Modifications for Unit and Structure Compatibility Table, Sections Table 1.D, below. Table 1.D MCC Modifications for Unit and Structure Compatibility Requires Requires Requires...

  • Page 18: Receiving, Handling And Storage

    Receiving, Handling and Receiving Storage As standard, CENTERLINE Motor Control Centers are shipped upright in shipping blocks of one to three front-mounted sections or two to six back-to-back sections. Each shipping block of an MCC is provided with a lifting angle. The lifting angle is optional on NEMA Type 3R and Type 4 MCCs.

  • Page 19: Handling

    General Information 1-11 Handling Lifting with a forklift, overhead lifting, sling lifting and pipe or rod rolling are methods that can be used to handle vertical sections. See Table 1.E and Table 1.F for typical weights and dimensions for standard 20” (508mm) wide and 15”...

  • Page 20: Storage

    2100-IN040x-EN-P, Receiving, Handling and Storing Motor Control Centers. Storage CENTERLINE MCCs conform to NEMA standard ICS-18-2001 for service and storage conditions. All MCCs should operate in an ambient temperature above 32 F (0...

  • Page 21: Installation Procedures

    Chapter Installation Procedures When planning the location for your CENTERLINE Motor Control Center, Location Planning consider the following: • Conduits • Busways • Overall height of installation area • Alignment with other equipment • Future needs • Ambient temperature The area must be level and the environment must be compatible with the NEMA enclosure rating of the equipment.

  • Page 22: Securing A Motor Control Center

    Installation Procedures Figure 2.1 Height Planning Dimensions Anchor bolts (1/2” [13 mm]) may be pre-located and embedded in the Securing a Motor Control foundation prior to installation. Two bolts per vertical section fasten the motor Center control center through its internal mounting angle to the foundation (corner sections require three bolts and 40”...
  • Page 23 Installation Procedures Figure 2.2 Mounting Dimensions for 15” and 20” Deep Front-Mounted Section (2) mounting slots .56" x 1.13" SLOTS (14mm) x (29mm) SLOTS Ground Bus Rear Front For Seismic bolt-down applications: For Seismic bolt-down applications: Last section of the MCC line-up First section of the MCC line-up extra bolt-down locations (2 bolts) 15"...
  • Page 24 Installation Procedures Figure 2.3 Mounting Dimensions for 30” and 40” Deep Back-to-Back Section 1.69" (43mm) (4) Mounting Slots Front .56" x 1.13" Slots (14mm) x (29mm) Slots 7.38" (187mm) Standard Ground Bus .25" (6mm) Rear 3.19" (81mm) Rear Standard Ground Bus .25"...
  • Page 25 Installation Procedures Figure 2.4 Mounting Dimensions for 15” and 20” Deep x 40” Wide Front-Mounted Section 40.00" (1016mm) 10.00" (254mm) 10.00" (254mm) 1.69" (43mm) Rear .25" (6mm) 7.15" (102mm) Front Standard (4) Mounting Slots 20.00" Ground Bus .56" x 1.13" Slots (508mm) 14mm x 29mm Slots Section Depth...

  • Page 26: Seismic Requirements

    MCC samples to static and dynamic (triaxial multi-frequency testing) seismic tests. The results of this evaluation and testing qualify the CENTERLINE MCC of sufficient integrity to exceed a Zone 4 seismic withstand per the UBC's requirements, i.e. neither the MCC structure, units, components or electrical functions will be compromised when subjected to a Zone 4 seismic event.

  • Page 27: Joining & Splicing New Motor Control Centers

    Installation Procedures NOTE: In seismic application dimensions “E” applies to the first and last sections of the MCC line-up. See Figure 2.2 for dimensions. Figure 2.7 Seismic Bolt Down Requirements REAR LAST SECTION FIRST SECTION FRONT 2ND SECTION AND ADDITONAL SECTONS MOTOR CONTROL CENTER LINE-UP - HARDWARE REQUIRED IS 1/2 INCH GRADE 2 OR BETTER BOLTS EMBEDDED IN FOUNDATION...

  • Page 28: Joining & Splicing Existing Motor Control Centers

    A main horizontal bus, a neutral bus (if required) and a ground bus splice kit Joining & Splicing Existing must be installed when adding to existing CENTERLINE motor control Motor Control Centers centers. When adding to existing motor control centers, you must identify the series of the motor control center that you will be adding to.

  • Page 29: Bus Torque Specifications

    Installation Procedures Figure 2.9 Joining Instructions for NEMA Type 3R and 4 Sections Cabinet Spacer (2) Wireway extensions required for 15" deep (2) .25" X .50" Taptites (2) Wireway extensions required for 20" deep (1) .25"-20 X .75" taptite per wireway extension Remove left hand driphood angle and remount after adjacent...
  • Page 30 2-10 Installation Procedures Publication 2100-IN012B-EN-P - April 2005...

  • Page 31: Final Checklist Before Energizing

    Chapter Final Checklist Before Energizing This section provides guidance for the start-up of a newly installed MCC. Introduction It is recommended to make an itemized list including: • Serial number • Number of sections • Number of units and their corresponding voltage •...

  • Page 32: Pre-Energizing Check Procedure

    Final Checklist Before Energizing 1.4.2 Is trained in the proper care and usage of protective equipment such as rubber gloves, hard hat, safety glasses or face shields, flash clothing, etc., in accordance with established safety practices.” Pre-Energizing Check Procedure To ensure the safety of personnel performing the ATTENTION pre-energizing check, make sure the motor control center remote power source(s) is disconnected and locked in the...
  • Page 33 Final Checklist Before Energizing 4. Check the integrity of the bus splice connections. Recommended torque values can be found on the information label located on the interior of the vertical wireway door or on the interior right-hand side plate of frame mounted units.
  • Page 34 Allen-Bradley AC drives and soft starter units are shipped with preset factory settings such as ramp speed, current limits, switch positions, readouts, etc. Preset factory settings may not be suitable for many applications.
  • Page 35 Final Checklist Before Energizing 12. Manually exercise all switches, control auxiliary switches, circuit breakers, their respective operators, unit interlocks, trip mechanisms (test by pushing the “Push to Trip” button) and any other operating mechanisms to verify proper operation. 13. Check timing relay settings as required. 14.
  • Page 36 Final Checklist Before Energizing 18. Conduct an electrical insulation resistance test to verify the MCC wiring integrity. Conduct this test using an insulation resistance tester (megger) with a potential of 500 - 1000 volts. This megger test should be conducted phase-to-phase, phase-to-ground and when applicable, phase-to-neutral on the MCC buswork.
  • Page 37 Final Checklist Before Energizing Table 3.B Spacing Requirements within Motor Control Center Units Minimum spacing, inch (mm) Between uninsulated live parts and the walls of a metal Between uninsulated live parts of opposite polarity and between an uninsulated live enclosure , including part and an exposed or uninsulated dead fittings for conduit or...
  • Page 38 Final Checklist Before Energizing Figure 3.1 Sample MCC Layout Worksheet Horizontal Wireway 1.0 S.F. 13" (330 mm) Full Width Section Horizontal Wireway Table 3.C Location of Sample Units within above MCC Layout Unit Data Wiring Catalog Number Diagram — — 2113B-EDB-48CA CSXXXXXXXX FVNR...
  • Page 39 Final Checklist Before Energizing Table 3.D Unit Description FCBX Insert with Circuit Breaker FDSX Insert with Fusible Disconnect FVLC Full Voltage Lighting Contactor Full Voltage Reversing FVNR (V) Full Voltage Non-Reversing (Vacuum) INSRT Unit Insert LPAN Lighting Panel (M)BPS MAIN Bolted Pressure Switch (M)CB MAIN Circuit Breaker (M)FDS...
  • Page 40 3-10 Final Checklist Before Energizing Table 3.E Motor Control Center Layout Worksheet ___________________________________________________________ MCC Name / Number Unit Data Catalog Number Wiring Diagram Publication 2100-IN012B-EN-P - April 2005...
  • Page 41 Final Checklist Before Energizing 3-11 Table 3.F Megger Reading Recording Table ___________________________________________________________ MCC Name / Number Circuit / Unit Phase-to-Phase Phase-to-Ground Phase-to-Neutral Date Name / Number A - B B - C C - A A - Grd. B - Grd. C - Grd.
  • Page 42 3-12 Final Checklist Before Energizing Publication 2100-IN012B-EN-P - April 2005...

  • Page 43: Chapter 4 Installing Conduit

    Chapter Installing Conduit and Cable When installing conduit, make sure it is installed according to local codes - to Installing Conduit assure water and moisture can not enter or accumulate in the MCC enclosure. Conduit must be installed so they are compatible with the NEMA rating of the MCC.

  • Page 44: Installing Cable

    Installing Conduit and Cable 3. To guard against dust or dirt from entering the top horizontal wireway, replace the top plate and lifting angle bolts. 4. Make sure that all incoming conduit is clear of the horizontal ground bus. 5. For approximate location of the horizontal ground bus mounted in the top horizontal wireway, refer to publication 2100–4.2, Mains and Incoming Lines Dimension Reference.

  • Page 45: Main Disconnect

    Crimp or compression lugs are optional. Cable Bracing The CENTERLINE MCC bus work system has been tested and is qualified to withstand maximum short circuit forces exceeding the short circuit withstand ratings for the MCC. Incoming line cables and outgoing feeder cables also need to be supported to withstand the same short circuit forces.
  • Page 46 Installing Conduit and Cable In Figure 4.1, glass fiber reinforced tape or glass filament tape is used. The taping should be continuous from the point the cables enter the MCC to the point the cables are terminated. It is important that cables are wrapped several times for additional strength.

  • Page 47: Incoming Line Brace

    42,000 amperes or greater, cables should be braced every 6” (153mm). Incoming Line Brace Allen-Bradley manufactures an incoming line brace similar to the hardwood clamping type brace. To order an incoming line brace, contact your local Allen-Bradley sales office and reference assembly number 40113–848.
  • Page 48 Installing Conduit and Cable Publication 2100-IN012B-EN-P - April 2005...

  • Page 49: Installing Plug-In Units

    Chapter Installing and Removing Plug-In Units Review your company safety lockout and tag-out ATTENTION procedure. De-energize all units before installing or removing. For unit installation, refer to publication 2100-IN014x-EN-P, Installing Units Installing Plug-In Units with Vertical Operating Handles, and publication 2400-IN007x-EN-P, Installing Units with Horizontal Operating Handles.
  • Page 50 Installing and Removing Plug-In Units Figure 5-2 Opening the Door of a Unit with a Vertical Operating Handle It is not necessary to remove the unit door to remove a unit from a section. However, steps 1 and 2 below may still be necessary even when door is not removed.
  • Page 51 Installing and Removing Plug-In Units Figure 5-3 Removing the Unit Door 1. Swing door to near closed position. 2. Lift door outward to remove. Figure 5-4 Disengage the Captive Latches Wiring Tunnel 1. Disengage captive latches located at front of unit, one at top and one at bottom of the unit.
  • Page 52 Installing and Removing Plug-In Units It is not necessary to place wires/terminal blocks into vertical wireway to remove a plug-in unit. Figure 5-5 Pull Unit Outward to Remove 4. Pull unit forward (outward) using handle provided at lower left of unit and the tab in the upper right of the unit as finger holds.
  • Page 53 Installing and Removing Plug-In Units 2. Turn door latch 1/4 turn. 3. Open door completely. Figure 5-7 Removing a Unit with a Horizontal Operating Handle. It not necessary to remove the unit door in order to remove a unit from a section. 4.

  • Page 54: Removing Support Pan

    Installing and Removing Plug-In Units Figure 5-9 Removing a Unit with a Horizontal Operating Handle 10. Push latch mechanism to the left with right hand. 11. Pull unit forward (outward) with left hand using the left top portion of the disconnect handle flange as finger hold. 12.
  • Page 55 Installing and Removing Plug-In Units Figure 5-11 Install Protective Caps or Close Manual Shutters 3. Pull right side of support pan forward to release from left rear slot on structure. 4. Push back on left side of support pan until support pan is free from structure.
  • Page 56 Installing and Removing Plug-In Units Publication 2100-IN012B-EN-P - April 2005...

  • Page 57: Flash Protection Marking Requirement

    Chapter Arc Flash Protection Marking as Required by the National Electrical Code The flash protection marking requirement was initially established in 2000 by Flash Protection Marking The National Fire Protection Association (NFPA 70E), Standard for Electrical Requirement Safety Requirements for Employee Workplaces. NFPA 70E applies to workers who install, maintain or repair electrical systems.

  • Page 58: Arc Flash Marking Clarification

    Arc Flash Protection Marking as Required by the National Electrical Code The flash protection marking per NEC Article 110.16 is a field marking Arc Flash Marking requirement and is to be applied by the user for each specific application. The Clarification marking is similar to other NEC marking requirements, e.g., voltage, voltage hazard labels, circuits, etc.

  • Page 59: Defeating The Unit Door Interlock

    Chapter Operator Handle and Unit Interlock The operator handle is an integral part of each MCC unit. Adjustment of the handle is not required. The operator handle is interlocked with each unit door as outlined by UL 845. Defeating the Unit Door Opening the Door when the Operating Handle is in the Interlock ON/I Position...
  • Page 60 Operator Handle and Unit Interlock Figure 7.1 Operating Handle Defeater for Vertical Operator Handle Figure 7.2 Operating Handle Defeater for Horizontal Operator Handle Follow NFPA 70E safety guidelines when working on ATTENTION energized equipment. Publication 2100-IN012B-EN-P - April 2005...

  • Page 61: Defeating The Unit Interlock Lever

    Operator Handle and Unit Interlock Defeating the Unit Interlock Energizing a Unit with the Unit Door Open Lever Follow NFPA 70E safety guidelines when working on ATTENTION energized equipment. When the unit door is open and the operator handle is in the OFF/O position, the defeater lever must be deliberately lifted on vertical handles or pushed to the left for horizontal handles to move the operator handle to the ON/I position and energize the unit.

  • Page 62: Locking Provisions

    Operator Handle and Unit Interlock Figure 7.4 Defeater Lever for Horizontal Operating Handle Locking Provisions Locking Vertical Operating Handles in the OFF/ Position Follow NFPA 70E for proper lockout/tagout guidelines ATTENTION when working on energized equipment. To lock the small, medium and large operator handle in the OFF/O position, put the shackle of the lock through the opening in the operator handle assembly.

  • Page 63: Locking Horizontal Operating Handles In The Off/O Position

    Operator Handle and Unit Interlock Locking Horizontal Operating Handles in the OFF/ Position Some units utilize a horizontal operating handle. The horizontal operating handle can be locked in the OFF/O position by putting the shackle of the lock through the open slotted area to the left of the operator handle. See Figure 7.6. Figure 7.6 Locking a Horizontally Mounted Operating Handle in OFF/ Position Locking units with Operating Handles in the ON/I Position...
  • Page 64 Operator Handle and Unit Interlock Figure 7.7 Locking Small Handle in ON/I POSITION, Vertical Operating Handle Drill Out Figure 7.8 Locking Medium Handle in ON/I Position Drill Out Publication 2100-IN012B-EN-P - April 2005...

  • Page 65: Unit Interlocks

    Operator Handle and Unit Interlock Figure 7.9 Locking Large Handle in ON/I Position Drill Out Drill Out Figure 7.10 Locking Horizontal Handle in ON/I Position Drill Out Unit Interlocks A unit interlock is provided with each plug-in unit. Unit interlocks prevent units from being removed from or inserted into a vertical section when the operator handle is in the ON/I position.
  • Page 66 Operator Handle and Unit Interlock Figure 7.11 Unit Interlock to prevent insertion, Vertical Operating Handler Figure 7.12 Unit Interlock to prevent insertion - Unit Completely Withdrawn Publication 2100-IN012B-EN-P - April 2005...
  • Page 67 Operator Handle and Unit Interlock Figure 7.13 Unit Interlock to prevent insertion, Horizontal Operating Handle Figure 7.14 Unit Interlock to prevent insertion - Unit Completely Withdrawn Publication 2100-IN012B-EN-P - April 2005...
  • Page 68 7-10 Operator Handle and Unit Interlock Publication 2100-IN012B-EN-P - April 2005...

  • Page 69: Energizing Procedure

    Chapter Energizing Equipment This procedure is provided as a general guidance for ATTENTION energizing a newly installed CENTERLINE Motor Control Center and should be used after the Final Check procedure has been completed, (see Chapter 3, Final Checklist Before Energizing).
  • Page 70 Energizing Equipment 5. After all of the disconnect devices have been closed, loads such as lighting circuits, motor starters, contactors, etc. may be energized. a. When power factor correction capacitors are energized with the motor windings and the start-up procedure requires that the respective motors be jogged or inched, temporarily disconnect the power factor correction capacitors.

  • Page 71: Maintenance Checklist

    Chapter Maintenance A periodic maintenance program should be established for motor control centers to avoid unnecessary downtime. The frequency of service to MCCs will depend upon the equipment usage and the environment in which it operates. The following is a suggested checklist and can be used to establish a maintenance program.
  • Page 72 Maintenance NOTE: The factory-made power bus connections are tightened by a computer-controlled torquing system. The following connections do not require re-torquing, vertical to horizontal bus connections and power conductor to horizontal bus connections. These factory-made connections do not require servicing for the life of the motor control center. 5.
  • Page 73 Maintenance 10. Check power contacts for excessive wear and dirt accumulation. Vacuum or wipe contacts with a soft cloth to remove dirt. Contacts are not harmed by discoloration and/or slight pitting. Contacts should never be filed, as this could reduce the life of the contacts. Contact spray cleaners should not be used, as they cause sticking on magnetic pole faces or in operating mechanisms, interfering with the electrical continuity of the contacts.

  • Page 74: Disconnect Switch And Contact Lubrication

    Maintenance Disconnect Switch and Contact Lubrication Follow NFPA 70E safety guidelines when working on ATTENTION energized equipment. To prevent injury or death to personnel lubricating disconnect switch contacts, make sure the motor control center power source(s) is disconnected and the respective disconnect(s) is locked in the OFF/O position.
  • Page 75 Maintenance 4. Generously apply the NO-OX-ID compound (sufficient enough to cover with a noticeable film) to both sides of the movable contact blades and to the adjacent insides stationary contacts and the hinge. 5. Reinstall the arc hood that was removed in Step 3. 6.
  • Page 76 Maintenance Publication 2100-IN012B-EN-P - April 2005...

  • Page 77: Maintenace After Fault Condition

    Chapter Maintenance After Fault Condition Maintenace After Fault Disconnect all power sources to the motor control center ATTENTION Condition before diagnosing the cause of a fault condition. The opening of the short circuit protective device (such as fuses or circuit breakers) in a properly coordinated motor branch circuit is an indication of a fault condition in excess of operating overload and must be corrected.
  • Page 78 10-2 Maintenance After Fault Condition Publication 2100-IN012B-EN-P - April 2005...

  • Page 79: Chapter 11 Order Information

    Chapter Renewal Parts A Renewal Parts Stocking Program for motor control centers is recommended in conjunction with a maintenance program. This is important for minimizing expensive downtime and to be able to facilitate critical repairs. Factors to consider when developing an effective Renewal Parts Stocking Program: 1.
  • Page 80 11-2 Renewal Parts Publication 2100-IN012B-EN-P - April 2005...

  • Page 81: Typical Section Construction

    Chapter Parts Illustrations Typical Section Construction Lifting Angle Top Horizontal Wireway Baffle Removable Top Plate Top Horizontal Wireway Cover Left Hand Top End Closing Plate Right Hand Unit Support Vertical Wireway Assembly Horizontal and Vertical Bus Splice Access Cover Bus Support Vertical Power Bus Section Nameplate Horizontal Power Bus...

  • Page 82: Operating Handle

    12-2 Parts Illustrations Typical Construction of a Unit with a Vertical Operating Handle Captive Latch Diagram Pocket Starter or Contactor Unit Stab Assembly Control Circuit Unit Handle Interlock Fuses and Circuit Breaker or Fusible Fuse Block Disconnect (shown) Auxiliary Contacts Overload Disconnect Handle Control Circuit...

  • Page 83: Typical Construction Of A Half Space Factor Unit With A Horizontal Operating Handle And Door Mounted Pilot Devices

    Parts Illustrations 12-3 Typical Construction of a Half Space Factor Unit with a Horizontal Operating Handle and Door Mounted Pilot Devices Unit Stab Assembly Control Circuit Transformer Contactor or Starter Overload Relay Control Circuit Fuse Circuit Breaker (shown) block and Fuses or Fusible Disconnect Handle Mechanism Unit Latch/Interlock...
  • Page 84 12-4 Parts Illustrations Typical Construction of a Unit with a Horizontal Operating Handle Unit Stab Assembly Contactor or Starter Control Circuit Transformer Overload Relay Circuit Breaker (shown) or Fusible Disconnect Control Circuit Fuse block and Fuses Control Terminal Block Handle Mechanism Unit Latch/Interlock Auxiliary Contacts Pilot Devices...
  • Page 85 Parts Illustrations 12-5 Notes: Publication 2100-IN012B-EN-P - April 2005...
  • Page 86 12-6 Parts Illustrations Notes: Publication 2100-IN012B-EN-P - April 2005...
  • Page 87 Rockwell Automation provides technical information on the web to assist you Rockwell Automation in using our products. At http://support.rockwellautomation.com, you can Support find technical manuals, a knowledge base of FAQs, technical and application notes, sample code and links to software service packs and a MySupport feature that you can customize to make the best use of these tools.
  • Page 88 www.ab.com/mcc Publication 2100-IN012B-EN-P – April 2005 Copyright © 2005 Rockwell Automation, Inc. All rights reserved. Printed in the U.S.A. Supersedes Publication 2100-5.0 - October 1995...

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