0500-5.0: NEMA AC Contactors For Motor Loads And Non
Page 1 of 21Knowledgebase Technote # Q19257 6/10/2003eRoc wM’AutomationAllen-BradleyNEMA AC Contactors for Motor Loads (Bulletin500) and Non-motor Loads (Bulletin 500L)Sizes 0 through 4 (all series), Size 5 (series L)Renewal PartsBulletin 500F - Size 13-Pole Motor LoadFeed-through Construction(Bulletin 500FL similar inappearance)Table of ContentsYour order must include:. Part No.l Description of partllCat. No. of contactorSeries letter of contactoru J lhE?e%RBulletin 500 -Size 03-Pole Motor LoadTop Wiring Construction(Bulletin 500L similar in appearance)Important: Save renewal parts list for future reference.Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Operating Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Renewal Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replacing Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Torque for Stationary Contact Replacement . . . . . . . . . . . . . . . . . . . . . .Movable Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Front Stationary Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Rear Stationary Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replacing the Stationary Contact Block and Base Assembly . . . . . . . . . .Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replacing Coil.Replacing Magnet (Yoke and Armature) . . . . . . . . . . . . . . . . . . . . . . . . . . . .Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Power Pole Adder.Removal of Power Pole for Sizes 0, 1, and 2Installing or Replacing Power Pole for Sizes 0, 1, and 2 . . . . . . . . . . .Installation for Normally Open and Normally Closed Power PoleAdders and Load Balances for Sizes 3, 4 and 5 . . . . . . . . . . . . .Tie Point Terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Device Markers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Top Wiring Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Modifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Auxiliary Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Removal of Auxiliary Contact Block . . . . . . . . . . . . . . . . . . . . . . . . . . . .Installing or Replacing an Auxiliary Contact Block . . . . . . . . . . . . . . . . . .Knowledgebase technotes can be found at 8889910101316171718181818
Page 2 of 21Knowledgebase Technote # Q19257 Knowledgebase technotes can be found at http://support.rockwellautomation.com/6/10/2003
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Page 5 of 21Knowledgebase Technote # Q19257 6/10/2003IDisassemblyATTENTION: To prevent electrical shock, disconnect frompower source before installing or servicing. Install in suitableenclosure. Keep free from contaminants.t0The following procedures and techniques are suggested to aid in thedisassembly and re-assembly of a typical motor contactor. It is not necessaryto remove the contactor from its enclosure or to remove the line wiring. Itmay be convenient to remove the line wiring on top-wiring contactors forbetter access to the rear stationary contact mounting screws. Refer to RearStationary Contacts, on page 7. Refer to exploded view, Figure 1, for itemnumbers.1. Remove all control wires from the operating coil (item 7).2. Loosen two captive screws and lift off the contact block cover (item 1).3. Loosen four captive screws from the coil cover (item 4).4. With the coil cover screws loosened, the auxiliary contact block(s)(item 6) can be removed and the coil cover lifted off.5. Lift out the movable contact support and armature assembly (item 2), theyoke (item 8), and the operating coil as a unit. The yoke and theoperating coil can now be lifted up and out of the movable contactsupport assembly.Replacing ContactsWhen severe contact wear is evidenced, it is recommended that all contactsbe replaced, including the modular power pole kits on 4 and 5 pole devices.Replacing all contacts will guard against uneven contact closings. Be sure tocheck contact spring flexibility and replace if necessary. Order the requirednumber of single pole contact sets from the part listings on page 3 and referto page 9 for Cat. No. and details on Power Pole Kit. Follow disassemblysteps l-5.Torque for Stationary Contact ReplacementSizeI01Note:Front and Rear Torque(approximately)8 - 10 0-130lbs.-in.Ibs.-in.Coil cover torque for sizes 0 to 2 is approximately 14-17 lbs.-in. Forsizes 3 to 5, torque is approximately 25-30 lbs.-in.5Knowledgebase technotes can be found at http://support.rockwellautomation.com/
Page 6 of 21Knowledgebase Technote # Q19257 Replacing Contacts (cont.)6/10/2003Movable ContactsFigure 2Refer to exploded view, Figure 1, for item numbers.1. Remove the movable contact (item 9) by depressing the contact spring(item 10) and pushing the contact out to either side. The contact springwill fall free or can be lifted out.2. Hold the replacement spring and contact in one hand as shown inFigure 2.3. Insert the contact spring over the “seating projection” on the movablecontact support assembly. Slip the movable contact and spring intoposition in the opening on the movable contact support assembly. Rockthe spring into position over the seating projection on the movable contactsupport and the movable contact.4. Check to determine that the spring is holding the contact in a centeredposition.Front Stationary ContactsRefer to exploded view, Figure 1, for item numbers.The mounting screws or bolts that secure the front stationary contacts (item11) are accessible from the front and are located directly below and to theback of the front terminal assemblies. A socket wrench should be used toloosen and tighten contact securing bolts.Note:Front and rear contacts should be removed and replaced in pairs, oneat a time.1. Loosen and remove the screw or bolt and lift out the contact.2. Install the replacement contact (front and rear stationary contacts areidentical) and tighten the contact mounting screw or bolt securely.6Knowledgebase technotes can be found at http://support.rockwellautomation.com/
Page 7 of 21Knowledgebase Technote # Q19257 Rear Stationary ContactsRefer to exploded view, Figure 1, for item numbers.The mounting screws or bolts that secure the rear stationary contacts (item12) are accessible from the top and are located at an angle in the cavitiesdirectly behind the front terminal assemblies.1 . Loosen and remove the mounting screw or bolt while holding the contactwithin the contact block assembly.2. Push the loose contact up and out or allow it to drop down.3. Install the replacement contact from the top, catching it from within thecontact block assembly.4. Insert the mounting screw or bolt and tighten securely.Replacing the Stationary Contact Block and Base AssemblyRefer to exploded view, Figure 1, for item numbers.The block and base assembly (item 3) can be removed from a partiallydisassembled starter, if necessary. First follow Disassembly steps l-5. Theblock and base assembly is connected to the incoming lines.1. Remove the line wiring and label or mark all wires.2. The block and base assembly is connected to the mounting plate (item 5)by three mounting screws with washers (item 13). Remove these screws,and the stationary contact block and base assembly (item 3) can be liftedup and out.3. If new contacts are not being installed, remove stationary contacts one ata time from the old block and base assembly and install them in the samepositions in the new assembly. See instructions under ReplacingContacts on page 5. Follow those instructions also if installing newcontact sets.4. If the contactor is of the 4 or 5 pole power pole construction, and newcontacts are not being installed, remove the power pole kit(s) and/or loadbalancer, and install them in the same position on the new assembly.Refer to page 10 for instruction on removal and installation of PowerPole Kit.5. Install the replacement block and base assembly and secure the threescrews with washers and tighten securely.6. Reconnect line wiring.Knowledgebase technotes can be found at http://support.rockwellautomation.com/6/10/2003
Page 8 of 21Knowledgebase Technote # Q19257 Reassembly6/10/2003Refer to exploded view, Figure 1, for item numbers.1. Place the movable contact support and armature assembly (item 2) in thecontactor base. Attach the contact block cover(s) and tighten screwssecurely (approximately 25 - 30 lbs.-in.).2. Insert the yoke (item 8) into the operating coil (item 7). Place theyoke-coil assembly into the contactor base. The parts are keyed to fitonly one way.3. Replace the coil cover (item 4). If used, check the tie point terminal forproper position. Tighten the coil cover screws securely (approximately25 - 30 lbs.-in.).4. With the movable contact support and armature assembly in the “OFF”position, install the auxiliary contact block(s) (item 6), if used, usinginstructions provided on the auxiliary contact block label.5.Replacing CoilReconnect all control wirings.Refer to exploded view, Figure 1, for item numbers.1. Remove all wires from coil.2. Remove coil cover (item 4).Note:Auxiliary contact will come off with coil cover.3. Slide out coil (item 7) and yoke (item 8) from movable contact supportand armature assembly (item 2).4. Replace coil and reassemble with yoke.5. Slide yoke and coil back into movable contact and armature assembly.6. Reattach coil cover.7. Reattach wire to coil.8. Reattach auxiliary contact (see p. 19).Replacing Magnet(Yoke and Armature)Refer to exploded view, Figure 1, for item numbers.1. Always replace yoke and armature at the same time.2. Remove contact block cover (item 1), coil cover (item 4), coil (item 7),yoke (item 8), and movable contact support and armature assembly(item 2).3. Replace yoke and movable support armature assembly.4. Reassemble as previously noted.8Knowledgebase technotes can be found at http://support.rockwellautomation.com/
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Page 12 of 21Knowledgebase Technote # Q19257 Accessories (cont’d)6/10/2003washers, and flat washers according to Figure 6. Tighten screws securely(approximately 16-20 lb.-in. torque).6. Place the movable contact carrier in the contactor base. Attach thecontact block covers on both the controller and the power pole adder.Tighten screws securely (approximately 25 - 30 lb.-in. torque).7. Insert the magnet yoke in the coil (see page 4). Place the yoke-coilassembly in the contactor base. The parts are keyed to fit only one way.8. Replace the coil cover. Check the tie point terminal for proper position.Tighten coil cover screws securely (approximately 25 - 30 lb.-in.)9. With the movable contact support in the “OFF” position, install theauxiliary contact block(s) according to the instructions on the auxiliarycontact block label.10. Properly reconnect all control wiring.Figure 5Right Side AssemblyAdder PoleContact CarrierMovableContactCarrier12--j-j Knowledgebase technotes can be found at http://support.rockwellautomation.com/
Page 13 of 21Knowledgebase Technote # Q19257 6/10/2003Figure 6Right Side Installation-4 o/47Rectangular,Slot&A/Contact BlockCover1//ProjeAions(Both Sides)Lug/Terminal ClampPower PoleMtg. Screw01AInstallation for Normally Open and Normally Closed Sizes 3, 4, and 5Power Pole Adders and Load BalancersNote:When a single power pole adder (Figure 6) is added to a contactor, aload balancer (Figure 7 and Figure 8) must be added to the oppositeside of the contactor. Each kit contains one power pole adder, oneload balancer, one adder pole contact carrier, and mountinghardware. When installing two power pole adders to a singlecontactor, install a power pole adder on each side and discard loadbalancers.Load Balancer Assembly Procedure for Size 3 (See Figure 7)1. Using a screwdriver, push a special nut into the front nut pocket, makingsure that the extruded rim on the threaded hole is to the inside of thecontactor.2. Position the load balancer against the contactor base. The rectangularprojection on the load balancer fits into the rectangular slot in thecontactor base when positioned correctly. Install the two #8 - 32 X1 - 9/16" screws, lock washers, and flat washers as shown in Figure 7.Tighten screws securely (approximately 16 - 20 lb.-in. torque).13Knowledgebase technotes can be found at http://support.rockwellautomation.com/
Page 14 of 21Knowledgebase Technote # Q19257 Accessories (cont.)6/10/2003Figure 7(Size 3) Left Side InstallationPower PoleAdderReactangularSlotSpecial Nut, Pushed intoFront Nut PocketLoad Balancer Assembly Procedure for Size 4 and 5 (See Figure 8)1. Using a screwdriver, push the special nuts into the nut pocket, makingsure that the extruded rims on the threaded holes are to the inside of thecontactor.2. Position the load balancer against the contactor base. The rectangularprojection on the load balancer fits into the rectangular slot in thecontactor base when positioned correctly. Install the three mountingscrews, lock washers, and flat washers according to Figure 8, using thescrew lengths specified for each position. Tighten screws securely(approximately 16-20 lb. -in. torque).14Knowledgebase technotes can be found at http://support.rockwellautomation.com/
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Page 21 of 21Knowledgebase Technote # Q19257 Important User Information6/10/2003Because of the variety of uses for the products described in this publication, those responsible forthe application and use of this control equipment must satisfy themselves that all necessary stepshave been taken to assure that each application and use meets all performance and safetyrequirements, including any applicable laws, regulations, codes and standards.The illustrations, charts, sample programs and layout examples shown in this guide are intendedsolely for purposes of example. Since there are many variables and requirements associated with anyparticular installation, Rockwell Automation does not assume responsibility or liability (to includeintellectual property liability) for actual use based upon the examples shown in this publication.Allen-Bradley publication SGI-1.1, Safety Guidelines for the Application, Installation and Maintenance ofSolid-State Control (available from your local Allen-Bradley office), describes some importantdifferences between solid-state equipment and electromechanical devices that should be taken intoconsideration when applying products such as those described in this publication.Reproduction of the contents of this copyrighted publication, in whole or part, without writtenpermission of Rockwell Automation, is prohibited.Throughout this document we use notes to make you aware of safety considerations:ATTENTIONIdentifies information about practices or circumstances that can lead topersonal injury or death, property damage or economic loss!IMPORTANTIdentifies information that is critical for successful application andunderstanding of the product.Use only replacement parts and devices recommended by Rockwell Automation to maintain theintegrity of the equipment. It is the user’s responsibility to ensure that the renewal part numberselected is properly matched to the model, series and revision level of the equipment being serviced.ATTENTION!Servicing energized Industrial Control Equipment can be hazardous.Severe injury or death can result from electrical shock, burn, orunintended actuation of controlled equipment. Recommended practiceis to disconnect and lockout control equipment from power sources,and release stored energy, if present.Refer to National Fire Protection Association Standard No. NFPA70E, Part 2 and (asapplicable) OSHA rules for Control of Hazardous Energy Sources (Lockout/Tagout) andOSHA Electrical Safety Related Work Practices for safety related work practices, includingprocedural requirements for lockout/tagout, and appropriate work practices, personnelqualifications and training requirements where it is not feasible to de-energize and lockout or tagoutelectric circuits and equipment before working on or near exposed circuit parts.ROCKWELL DISCLAIMS ALL WARRANTIES WHETHER EXPRESSED OR IMPLIED INRESPECT TO THE INFORMATION (INCLUDING SOFTWARE) PROVIDED HEREBY,INCLUDING THE IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE,MERCHANTABILITY, AND NON-INFRINGEMENT. Note that certain jurisdictions do notcountenance the exclusion of implied warranties; thus, this disclaimer may not apply to you.Allen-Bradley is a trademark of Rockwell AutomationKnowledgebase technotes can be found at http://support.rockwellautomation.com/
500) and Non-motor Loads (Bulletin 500L) Sizes 0 through 4 (all series), Size 5 (series L) Renewal Parts Bulletin 500F - Size 1 3-Pole Motor Load Feed-through Construction (Bulletin 500FL similar in appearance) Bulletin 500 -Size 0 u 3-Pole Motor Load E?e%RJ lh Top Wiring Construction
No Suffix NEMA Type 1 DX NEMA Type 4X KRYDON A NEMA Type 12K R NEMA Type 3R AWK NEMA Type 12 (Without K.O.) RB NEMA Type 3R (Bolt-on hub provision) DS NEMA Types 4, 4X, 5 (Stainless steel) RWK NEMA Types 1, 3 & 12 (6-pole switches only) CS C
NEMA ICS 3 Industrial Systems NEMA ICS 4 Terminal Blocks for Industrial Control Equipment and Systems NEMA ICS 6 Enclosures for Industrial Control Systems NEMA L 11 Industrial Laminated Thermosetting Products. NEMA LA 1 Surge Arresters NEMA PB 1 Panelboards NEMA PE 5 Constant-Potential-Type Electric Utility Battery Chargers NEMA RI 2 General .
NEMA Size 1 NEMA Size 2 F00 F0 F1 F2 6.4 – 32 NEMA Size 0 NEMA Size 1 FB FD 9 – 45 NEMA Size 2 FG 22 – 110 NEMA Size 3 FK FLA Range Contactor Suffix 0.1 – 0.5 0.4 – 2.0 1 – 5 15, 25, 30A DC 1.6 – 8 15, 25, 30,
NEMA ICS 2.2, , 1983. NEMA ICS 14, Application Guide for Electric Fire Pump Controllers20012010 NEMA ICS 15, NEMA 250, Enclosures for Electrical Equipment19912008 This documents the latest edition years as requested by the Panel. NEMA 2.2 is no longer active. Material has been included into NEMA ICS 15 which should be added.
NEMA SG-5 - Power Switchgear Assemblies NEMA SG-6 - Power Switching Equipment NEMA C37.20 - Switchgear Assemblies NEMA C37.30 - Requirements for High Voltage Air Switches NEMA C37.31 - Indoor Apparatus Insulators for High Voltage Switches NEMA C37.33 - P
Sub-Micro AC Inverters Speedmaster senorless vector drives with "big drive" features and ultra-compact size. SM2 - 1/2 through 25 HP. IP31 enclosure — NEMA 1 Type. SM4 - 1/2 through 10HP IP65 NEMA 4. Micro Series NEMA Enclosed AC Inverters . Models range from sub-FHP through 3 HP. NEMA 1, NEMA 4/12 and NEMA 4X enclosures available.
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