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Rockwell Automation Allen-Bradley 7712, User Manual

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Rockwell Automation Allen-Bradley 7712 User Manual Download Page 56

56

Rockwell Automation Publication 7712-UM001D-EN-P - October 2017

Chapter 5

Maintenance

Earthing Switch Auxiliary 

Maintenance

Auxiliary Contacts Replacement

1. Remove all the wire connected to the auxiliary and mark each wire for 

rewiring. 

2. Remove the auxiliary mounting hardware (M3.5 hex nut, washer, and 

cheese head screw).

3. Replace the existing auxiliary. 
4. Rewire the terminals with correct wire and secure the auxiliary with the 

mounting hardware.

Figure 41 - Auxiliary Contacts Replacement

Auxiliary Contacts Adjustment

The auxiliary is mounted to a slotted L-bracket using a M3.5 cheese head 

screw, washer, and nut. The L-bracket with the auxiliary is mounted to the base 

of the earthing switch using two M6 taptie. The switch must be positioned so 

the roller of the auxiliary sits on top of the actuator hump.

Horizontal Adjustment

1. Loosen the auxiliary mounting hardware (two M3.5 hex nuts).
2. Adjust the auxiliary as required. 
3. Secure the adjusted position of auxiliary by tightening the nut.

Summary of Contents for Allen-Bradley 7712

Page 1: ...OneGear 7 2 kV Motor Controller Full voltage Non reversing Bulletin Number 7712 User Manual OriginalInstructions ...

Page 2: ...information circuits equipment or software described in this manual Reproduction of the contents of this manual in whole or in part without written permission of Rockwell Automation Inc is prohibited Throughout this manual when necessary we use notes to make you aware of safety considerations Labels may also be on or inside the equipment to provide specific precautions WARNING Identifies informati...

Page 3: ...d Accessibility Requirements Recommended Torque Values 15 Open the Enclosure Doors 16 Opening the Low Voltage Door 16 Opening the Medium Voltage Door 17 Chapter3 Start up Procedure Contactor Inspection 19 Preliminary Checks 19 Testing Contactor Operation 20 Test Power Supply 21 Operating Position 21 Chapter4 Equipment Operation Power Lockout Procedure 27 Open Contactor 27 Power Down Low Voltage Se...

Page 4: ... 53 Inspect and Lubricate Earthing Switch Mechanism 53 Ground Connection Inspection 55 Toggle Assembly Inspection 55 Earthing Switch Auxiliary Maintenance 56 Auxiliary Contacts Replacement 56 Auxiliary Contacts Adjustment 56 Earthing Switch Auxiliary Contacts Inspection 57 AppendixA Spare Parts Typical Bulletin 7712 Parts 59 AppendixB Certification Data Test Summary 61 High Voltage Controlgear Sta...

Page 5: ...ontents Connections 70 Motor Connection from 7791 70 Motor Connection from 7712 70 Interlock Operation Sequence One Motor 70 Initial Condition 70 To Run Drive 70 To Run Bypass 71 To open Drive for Service 71 To open Output Cabinet 71 Interlock Operation Sequence Two Motors 71 ...

Page 6: ...6 Rockwell Automation Publication 7712 UM001D EN P October 2017 Table of Contents Notes ...

Page 7: ...ethod of servicing medium voltage products Contact your local area support office to make arrangements to have a qualified service representative come to your facility A complete listing of Area Support Offices may be obtained by calling your local Rockwell Automation Distributor or Sales Office For Medium Voltage technical support on start up or existing installations contact your Rockwell Automa...

Page 8: ...tches European Directives for Safety and EMC RoHS Note It is the responsibility of the customer and or installer to know and meet all local codes standards and OSHA requirements Controller Unit Identification A nameplate is attached to the front door of the structure see Figure 1 Refer to the nameplate for information such as series number section number enclosure type unit ratings and bus ratings...

Page 9: ...ifications and an overview of the features andfunctions provided by the controller and in coming line unit OneGearSMCFlexSolid StateMotorController 10 15 kV Specification Guide 7760 SR001 Provides a outline for the overall fabrication performanceandfunctionalrequirementsforamedium voltage reduced voltage solid state motor controller RVSS for use with induction and brush type synchronous motors How...

Page 10: ...10 Rockwell Automation Publication 7712 UM001D EN P October 2017 Preface Notes ...

Page 11: ...tance The controller must be derated for ambient temperatures above 40 ºC 104 F The equipment operates at altitudes from 0 1000 m 3300 ft above sea level without de rating For applications above 1000 m 3300 ft the maximum current and Basic Impulse Levels B I L of the controllers and incoming line unit shall be de rated and vacuum contactors breakers will be compensated for operation at the specifi...

Page 12: ... Height 1 1 The height dimension does not include the plenum 574 mm 22 60 in which is removed for shipping and installed by the customer The total height of the unit including an installed plenum is 2674 mm 105 27 in Depth Weight 7712 250 A single fuse FVNR Controller 350 mm 13 78 in 2200 mm 86 71 in 1100 mm 43 31 in 489 kg 1075 lb 7712 330 A double fuse FVNR Controller 350 mm 13 78 in 2200 mm 86 ...

Page 13: ...ucture All covers plates and hardware removed for installation or maintenance purposes must be re installed and properly secured Failure to do so voids the arc flash resistant integrity Power cable entry points are to be treated as the boundary between a hazardouslocationandsealedaccordingly Failuretodosovoidsthearcflash resistant integrity A plenum must be used to direct the arc flash energy to a...

Page 14: ...14 Rockwell Automation Publication 7712 UM001D EN P October 2017 Chapter 1 General Information Notes ...

Page 15: ...may result in severe burns injury or death IMPORTANT For general information on handling medium voltage controllers and preparing the installation site see publication MV QS050 ATTENTION Use suitable personal protective equipment PPE per local codes or regulations Failure to do so may result in severe burns injury or death Hardware Size Tightening Torque Required 1 4 in M6 6 ft lb 8 N m 5 16 in M8...

Page 16: ...sing an Allen key turn the two 1 4 turn fasteners 90 clockwise and swing the door to the left Close and secure the low voltage door in the reverse order of opening Figure 4 Enclosure Compartments IMPORTANT The medium voltage door is interlocked to the isolation shutter and or the earthing switch The low voltage panel compartment and power cell are separated by an isolation barrier ArecShield Plenu...

Page 17: ... of opening ATTENTION This procedure requires contact with medium voltage components To avoid shock hazards complete the Power Lockout procedure on page 27 before servicing the equipment Verify with a hot stick or appropriatevoltagemeasuringdevicethatallcircuitsarevoltagefree Failure to do so may result in severe burns injury or death IMPORTANT Failure to open the medium voltage door in the proper...

Page 18: ...18 Rockwell Automation Publication 7712 UM001D EN P October 2017 Chapter 2 Safety Interlock and Accessibility Requirements Notes ...

Page 19: ...orrect Heater elements if provided in the overload relay are secure and undamaged All equipment is correctly grounded External power and control connections match the electrical diagrams All hardware is correctly reinstalled and torqued to the correct specification see Recommended Torque Values on page 15 All barriers are replaced and in the correct position All fuses are the correct class type an...

Page 20: ...h is closed The shutter behind the cart in the MV compartment should be closed under this situation This should be confirmed after opening the MV door If the MV door cannot be opened smoothly the shutter is not completely shut off or the earthing switch is not completely closed ATTENTION Always perform the power lockout procedure before servicing equipment Failure to do so may result in severe bur...

Page 21: ...ctions of this equipment Any operation on the contactor will affect the MV status on the load side ATTENTION Use suitable personal protective equipment PPE per local codes or regulations Failure to do so may result in severe burns injury or death IMPORTANT It is not possible to use any test power supply after the contactor cart has been racked out of the test position A set of auxiliary switches o...

Page 22: ...V panel as designed Test the Contactor Contactor must be in the withdrawn test position 1 Connect the appropriate external power supply 120V or 230V AC to the test receptacle in the control panel Turn the selector switch to the TEST position 2 Electrically operate the contactor several times Inspect the armature plate to verify that it fully contacts the magnetic cores Contactor should close when ...

Page 23: ...Rockwell Automation Publication 7712 UM001D EN P October 2017 23 Start up Procedure Chapter 3 Figure 6 TypicalWiringDiagram Electrically Held Vacuum Contactor with IntelliVAC Control ...

Page 24: ...24 Rockwell Automation Publication 7712 UM001D EN P October 2017 Chapter 3 Start up Procedure ...

Page 25: ...Rockwell Automation Publication 7712 UM001D EN P October 2017 25 Start up Procedure Chapter 3 ...

Page 26: ...26 Rockwell Automation Publication 7712 UM001D EN P October 2017 Chapter 3 Start up Procedure ...

Page 27: ...oller 2 Open low voltage door to check the contactor status LED of IntelliVAC it must be off Power Down Low Voltage Section Besides either customer supplied LV power or defaulted CPT mounted on the contactor cart the Low Voltage Section can also be powered by a temporary LV test power supply 1 Turn the selection switch to Off 2 Unplug the temporary test power supply 3 Disconnect any customer suppl...

Page 28: ...itch to the Test position e Electrically operate the contactor by pushing the Start button on the unit or at a remote location f Disengage the contactor and turn the control switch to the Normal position Disconnect the external power supply g Complete the Power Lockout procedure 4 Use a 120V power cord and plug into the 120V plug on the Control Switch Assembly see Figure 5 on page 20 to test the s...

Page 29: ...ush toward rear of cabinet The wrench must be pushed toward rear of cabinet to unlock the cart raking screw The pressure must be maintained for the entire cart insertion withdraw operation 4 If cart is in test withdrawn position rotate the speed wrench clockwise to insert the cart Figure 8 From test to service position requires 11 complete rotations a mechanism stops the screw rotation after 11 tu...

Page 30: ...nfromthemechanismwithoutanyrotation This ensures the locking plate in the front of the cart will slide forward and lock the end of the racking screw locking in the same time the cart position The tool access flap must cover the opening after the speed wrench is redrawn IMPORTANT Before opening the earthing switch ensure the contactor cart is in the withdrawn test position and the door is closed an...

Page 31: ...tely closed Earthing Switch Positioning Indicators An arrow at the end of the earthing switch shaft indicates the state of the switch Depending on the position of the earthing switch the arrow points to the corresponding decal located on the door Open ClosedPositionIndicatorDecal In the closed position Figure 11 the arrow points toward I red background Figure 11 Switch indicator Off Earthing switc...

Page 32: ...the test withdrawn position The LV Plug and cable is attached on the cabinet door and is connected to the equipment in the LV cabinet on the top 1 Orient the LV plug aligning the guide pins on the cart with the openings in the plug 2 Push down the plug and secure the connection with the locking arm mounted on the cart Figure 13 Open position IMPORTANT LV must be connected for unit functionality Th...

Page 33: ...osition The color of the indicator will change to red even if the shutter door is partially open Figure 14 Shutter position Indicator Green The shutter door is closed Figure 16 the cart is completely redrawn in the test position Red The shutter door is open Figure 17 the indicatorwill change immediately after moving the cart from test withdrawn position to the service position Close position Green...

Page 34: ...2017 Chapter 4 Equipment Operation A viewing window Figure 15 shows the position of the contactor cart Figure 15 Viewing Window Figure 16 Shutter closed TIP Iftheshutterdoorispartiallyorfullyopen aninterlockpreventstheMVdoor from opening Viewing Window Indicator ...

Page 35: ...Rockwell Automation Publication 7712 UM001D EN P October 2017 35 Equipment Operation Chapter 4 Figure 17 Shutter open ...

Page 36: ...36 Rockwell Automation Publication 7712 UM001D EN P October 2017 Chapter 4 Equipment Operation Notes ...

Page 37: ...S 1 3 Preventive Maintenance of Industrial Control and Systems Equipment for general guidelines for setting up a periodic maintenance program Some specific guidelines for Rockwell Automation products are listed below ATTENTION Servicing energized Industrial Control Equipment can be hazardous Severe injury or death can result from electrical shock bump or unintended actuation of controlled equipmen...

Page 38: ...om sticking or binding Replace any broken deformed or badly wont parts or assemblies according to individual product renewal parts lists Check for and retighten securely any loose fasteners Lubricate if specified in individual product instructions Note Allen Bradley magnetic starters contactors and relays are designed to operate without lubrication do not lubricate these devices because oil or gre...

Page 39: ... a soft dry cloth Reflective devices used in conjunction with photoelectric switches also require periodic cleaning Do not use solvents or cleaning agents on the lenses or reflectors Replace any damaged lenses and reflectors Annual Maintenance Requirements Task Page Remove Contactor Cart 40 Remove and Replace Fuses 43 Contactor Cart Maintenance 45 Replace the Vacuum Bottles 45 Calibrate the Overtr...

Page 40: ... contactor cart platform is the same elevation as the service cart rails 2 Move the service cart to the cabinet and insert the cart pins into the enclosure Figure 18 Figure 18 Securing Service Cart to the front of the Cabinet 3 Insert cart latch key into the cart latch disengagement and turn the key approximately a quarter turn clockwise Figure 19 Ensure latch is disengaged from the rail ATTENTION...

Page 41: ...4 Keeping the key engaged grasp the handle Figure 20 and remove the contactor cart from the enclosure onto the service cart Figure 20 Contactor Cart Removal Handle 5 Once the contactor cart is extracted from the cabinet secure the cart using the latch and the service cart wheels to prevent movement Disengage cart latch ...

Page 42: ...42 Rockwell Automation Publication 7712 UM001D EN P October 2017 Chapter 5 Maintenance Figure 21 Contactor Cart removed from enclosure ...

Page 43: ...well Automation Publication 7712 UM001D EN P October 2017 43 Maintenance Chapter 5 Remove and Replace Fuses 1 Unscrew eight M8 bolts to remove the red Glastic cover Figure 22 Figure 22 Remove Glastic cover ...

Page 44: ...tion Publication 7712 UM001D EN P October 2017 Chapter 5 Maintenance 2 Replace each fuse by removing four M10 nuts Figure 23 Figure 23 Fuse Removal 3 Replace the M10 nuts and reattach the Glastic cover using the M8 bolts ...

Page 45: ...tions however all three bottles must be replaced if any wear indicator line Figure 24 reaches the bearing regardless of the number of operations Figure 24 Vacuum bottle wear indicator To access the vacuum bottles the glastic cover must be removed See page 43 1 Unscrew eleven M8 bolts to remove the fuse mounting mold Figure 25 Figure 25 Remove Fuse Mounting Mold Vacuum Bottle Wear indicator line on...

Page 46: ...Figure 26 Remove lower terminal connections 3 Remove the load terminal retaining bolt at the rear of the contactor and the vacuum bottle mounting bolt at the top of the contactor Figure 27 Figure 27 Mounting and Retaining bolt removal TIP Before removing the vacuum bottles mark the installed bottles clearly to avoid confusing them with the replacement vacuum bottles ...

Page 47: ...ve Vacuum Bottles 5 Install a new bottle by tilting an insulator forward and threading the bottle onto the stud The threads must align to prevent cross threading Thread the bottle down leaving a gap of approximately 4 82 mm 0 25 mm 0 190 in 0 01 in between the top of the bottle and the bottom surface of the line terminal Figure 29 Use an appropriate measuring tool to set the gap This gap is precis...

Page 48: ...n to prevent cross threading Hold the bottle to prevent it from turning while torquing the vacuum bottle mounting bolts Calibrate the Overtravel and Contact Gap 1 Close the contactor by using the TEST control circuit in the starter Insert a feeler gauge of 0 065 in 1 65 mm into the overtravel gap of a bottle assembly Figure 30 2 Rotate the insulator until the gap is correct Repeat for the two rema...

Page 49: ...r all three bottles must be between 0 180 0 200 in 4 57 5 08 mm If this is the case the replacement procedure is complete If further adjustment is required all three gaps can be adjusted simultaneously by loosening the stop bracket bolts and adjusting the height of the gap adjustment screw at the rear of the contactor Figure 32 To adjust the height of the screw first loosen the locking nut 8 When ...

Page 50: ...e lower terminal connections at the rear of the contactor and replace eleven M8 bolts to install the fuse mounting mold Lubricate the Contactor Cart 1 Grease the contactor interlock rod using Aeroshell No 7 Figure 33 Figure 33 Lubricate interlock rod Stop Bracket Bolts Gap Adjustment Screw Gap Adjustment Screw Locking Nut Stop Bracket ...

Page 51: ... Maintenance Chapter 5 2 Grease the front assembly guide rod on both side of the cart using Aeroshell No 7 Figure 34 Figure 34 Lubricate guide rod 3 Grease door to cart interlock sliding bracket Using Aeroshell No 7 Figure 35 Figure 35 Lubricate the sliding bracket ...

Page 52: ...52 Rockwell Automation Publication 7712 UM001D EN P October 2017 Chapter 5 Maintenance 4 Grease the tulip fingers Using Nye lubricant Nyogel 759G Figure 36 Figure 36 Lubricate the Tulip Fingers ...

Page 53: ...pter 5 Earthing Switch Maintenance Inspect and Lubricate Earthing Switch Mechanism 1 Inspect the lubrication between the ground stab and the earthing switch blades 2 Apply Nye lubricant Nyogel 759G to the ground stab Figure 37 as needed Figure 37 Lubricate Earthing Switch Mechanism ...

Page 54: ...lication 7712 UM001D EN P October 2017 Chapter 5 Maintenance 3 Grease Aeroshell No 7 the main shaft mating surface of cam and gear mating surface of shaft and gear housing Figure 38 Figure 38 Lubricate Earthing Switch Mechanism ...

Page 55: ...d connection 2 If seal is broken apply 11 lb ft 14 5 N m to secure and apply torque seal Figure 39 Ground Connection Inspection Toggle Assembly Inspection 1 Inspect the torque seal of the shoulder bolt for the toggle assembly 2 If seal is broken apply 4 4 lb ft 6 0 N m to secure the shoulder bolt and apply torque seal Figure 40 Toggle Assembly Inspection ...

Page 56: ...re and secure the auxiliary with the mounting hardware Figure 41 Auxiliary Contacts Replacement Auxiliary Contacts Adjustment The auxiliary is mounted to a slotted L bracket using a M3 5 cheese head screw washer and nut The L bracket with the auxiliary is mounted to the base of the earthing switch using two M6 taptie The switch must be positioned so the roller of the auxiliary sits on top of the a...

Page 57: ... the adjusted position of auxiliary by tightening the two M6 taptie Figure 42 Auxiliary Contacts Adjustment Earthing Switch Auxiliary Contacts Inspection Operation of electrical auxiliaries must be validated on a yearly basis Refer to the unit electrical drawing to determine the test locations on the terminals located in the low voltage compartment IMPORTANT Auxiliaries must be tested electrically...

Page 58: ...58 Rockwell Automation Publication 7712 UM001D EN P October 2017 Chapter 5 Maintenance Notes ...

Page 59: ...are Parts List Description Part Number CPT 300VA 50 60Hz 3300V 110V 220V PN 446670 CPT 300VA 50 60Hz 4160V 115V 230V PN 446676 CPT 300VA 50 60Hz 6600V 6900 V 120V 240V PN 446677 CPT Fuse 6600V 6900V 0 5E 80023 138 04 R CPT Fuse 50 60Hz 2400V 0 75E 80025 239 04 R CPT Fuse 4800V 0 5E 25172 551 02 R Potential Transformer 3300 V 220 230 V 80022 291 02 Potential Transformer 6600 V 220 230 V 80022 291 0...

Page 60: ...pare Parts List Description Part Number Phase Current Transformers CT Ratio 50 1 80026 696 01 Phase Current Transformers CT Ratio 75 1 80026 696 02 Phase Current Transformers CT Ratio 100 1 PN 466680 Phase Current Transformers CT Ratio 150 1 PN 466681 Phase Current Transformers CT Ratio 200 1 80026 696 05 Phase Current Transformers CT Ratio 250 1 PN 466682 Phase Current Transformers CT Ratio 300 1...

Page 61: ...oltage switchgear and control gear Part 102 Alternating current disconnectors and earthing switches IEC 62271 200 High voltage switchgear and control gear Part 200 AC metal enclosed switchgear and control gear for rated voltages above 1 kV and up to and including 52 kV Model 7712 Rating Rated Voltage 7 2 kV Rated lightning impulse withstand voltage 60 kV Rated power frequency withstand voltage 20 ...

Page 62: ...2485R Rockwell Automation HCL Mechanical Operation Tests Earthswitch and starter 50CO IEC 6470 6 101 2 ER 069 2012 Rockwell Automation Interlock 25CO IEC 6470 6 101 3 ER 069 2012 Rockwell Automation Earthswitch Class M1 2000 CO IEC 62271 102 4 106 6 102 ER 110 2011 Rockwell Automation Overload Current Tests 6 kA 1 s IEC 6470 6 102 7 20969 B 26 07 06 2011 Powertech 2 4 kA 30 s Rated making and brea...

Page 63: ... voltage components To avoid shock hazards complete the Power Lockout procedure on page 27 before servicing the equipment Verify with a hot stick or appropriatevoltage measuring devicethatallcircuitsarevoltage free Failure to do so may result in severe burns injury or death WARNING Usesuitablepersonalprotectiveequipment PPE perlocalcodes or regulations Failure to do so my result in severe burns in...

Page 64: ...7 Appendix C Troubleshooting Figure 43 Circumvent Earthing Switch to Door Interlock 3 Push the top edge of the interlock mounting bracket downward using a flathead screwdriver Open the door 4 Reverse steps 1 through 2 to reassemble the mounting bracket to the door ...

Page 65: ...ents To avoid shock hazards complete the Power Lockout procedure on page 27 before servicing the equipment Verify with a hot stick or appropriatevoltagemeasuringdevicethatallcircuitsarevoltagefree Failure to do so may result in severe burns injury or death WARNING Use suitable personal protective equipment PPE per local codes or regulations Failure to do so my result in severe burns injury or deat...

Page 66: ... a flat head screw driver through the hole on the LV compartment floor and push the lever mounting plate left to release the interlock hook located at the door Figure 45 Figure 45 Circumvent Door to Isolation Shutter 4 Reverse steps 1 through 2 to reassemble the lever arm to roof of the MV compartment ...

Page 67: ...endix D Mechanical Interlock for 7712 and PowerFlex 7000 Drive Figure 46 PowerFlex drive with bypass using OneGear 7712 controllers Figure 47 Transfer Block Incomer 7791 Bypass 7712 MB Drive Input 7712 D VFD Drive Output 7712 DO Output Cables 7791 F KC KC KC KC KC KB KA ...

Page 68: ...2 and PowerFlex 7000 Drive Figure 48 PowerFlex Drive with Two Motor Synchronous Transfer Bypass using OneGear 7712 Controllers Figure 49 Transfer Block Incomer 7791 Bypass M1 7712 MB Bypass M2 7712 D Drive Input 7712 VFD Drive Output 7712 DO Output Cables 7712 MO Output Cables 7712 MO KC KC KC KC KC KB KA ...

Page 69: ... to operate based on the contactor cart position Key is captive in the lock until the contactor is fully racked out and the key is turned When the key is removed the lock must prevent racking the cart in It must be possible to open the door and remove the cart The existing door to cart interlock prevents racking the cart in when the door is open KC Keys for doors 1 Key in the Drive door Prevent th...

Page 70: ...Interlock Operation Sequence One Motor Initial Condition All doors closed Bypass Drive Input Drive Output contactors in open and the cart withdrawn Bypass earth switch closed KC and KD keys in earth switch KA key in the Drive Input cabinet in transfer block KB key in Drive Output cabinet in transfer block KC keys 4 in transfer block one in earth switch in Bypass cabinet To Run Drive Open earth swi...

Page 71: ...e with Drive Input contactor closed and Drive Output contactor open To open Drive for Service Open Drive Input contactor withdraw cart Lock open remove KA and KB keys and place them in transfer block Remove KC keys use to open doors To open Output Cabinet Open Bypass contactor and withdraw cart Close earth switch Lock closed remove KD key Put KD and KC keys in door to open Interlock Operation Sequ...

Page 72: ...72 Rockwell Automation Publication 7712 UM001D EN P October 2017 Appendix D Mechanical Interlock for 7712 and PowerFlex 7000 Drive Notes ...

Page 73: ......

Page 74: ...e Direct Dial Code for your product Use the code to route your call directly to a technical support engineer http www rockwellautomation com global support direct dial page Literature Library Installation Instructions Manuals Brochures and Technical Data http www rockwellautomation com global literature library overview page Product Compatibility and Download Center PCDC Get help determining how p...

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