Eaton Cutler-Hammer W-VAC, Instructions For Installation, Operation And Maintenance

Page 1: ...I B 3A74791H04 Effective 7 97 Cutler Hammer Instructions for Installation Operation and Maintenance of Type W VAC 36kV Vacuum Circuit Breakers ...

Page 2: ......

Page 3: ...URY OR PROPERTY DAMAGE READ AND UNDERSTAND THESE INSTRUCTIONS BEFORE ATTEMPTING ANY UNPACKING ASSEM BLY OPERATION OR MAINTENANCE OF THE CIR CUIT BREAKERS INSTALLATION OR MAINTENANCE SHOULD BE ATTEMPTED ONLY BY QUALIFIED PERSONNEL THIS INSTRUCTION BOOK SHOULD NOT BE CON SIDERED ALL INCLUSIVE REGARDING INSTALLA TION OR MAINTENANCE PROCEDURES IF FUR THER INFORMATION IS REQUIRED YOU SHOULD CONTACT CUT...

Page 4: ...ECTION 4 INITIAL INSPECTION AND INSTALLATION 4 1 Introduction 12 4 2 Manual Operation Check 12 4 3 Vacuum Interrupter Integrity 12 4 4 Insulation 12 4 5 Contact Erosion and Wipe 12 4 6 Primary Circuit Resistance 12 4 7 Nameplate 12 4 8 Electrical Operation Check 13 4 8 1 Circuit Breaker Insertion and Removal 13 4 8 2 Operation Check Performance 14 4 9 Breaker Structure Interfacing 14 4 9 1 Interfa...

Page 5: ...AINTENANCE AND TROUBLESHOOTING 6 1 Introduction 26 6 2 Frequency of Inspection and Maintenance 26 6 2 1 Qualified Personnel 26 6 2 2 Helpful Tools and Accessory Items 26 6 2 3 General Torque Guidelines 26 6 3 Inspection and Maintenance Procedures 29 6 4 Vacuum Interrupter Integrity Test 30 6 5 Contact Erosion 30 6 6 Contact Wipe 30 6 7 Insulation 31 6 8 Insulation Integrity Check 31 6 9 Primary Ci...

Page 6: ...ic Representation of Arc Interruption 17 5 4 Closing Cam and Trip Linkage 19 5 5 Charging Schematic 21 5 6 Typical 36kV W VAC DC and AC Control Schematics 22 5 7 Secondary Circuit Breaker Plug Shown Mounted Lower Left 23 5 8 Undervoltage Trip Device Configuration 25 6 1 Lubrication Points 28 6 2 Rear Measurement for Contact Erosion Being Made Circuit Breaker Closed 31 6 3 Graphical Representation ...

Page 7: ...AS PART OF THE PROCEDURAL STEPS IN THIS DOCU MENT ARE FOR PERSONNEL SAFETY AND PRO TECTION OF EQUIPMENT FROM DAMAGE AN EXAMPLE OF A TYPICAL WARNING LABEL HEAD ING IS SHOWN ABOVE IN REVERSE TYPE TO FAMILIARIZE PERSONNEL WITH THE STYLE OF PRESENTATION THIS WILL HELP TO INSURE THAT PERSONNEL ARE ALERT TO WARNINGS WHICH MAY APPEAR THROUGHOUT THE DOCU MENT IN ADDITION CAUTIONS ARE ALL UPPER CASE AND BO...

Page 8: ...t Power Lightning Frequency Impulse 1 Minute U Uw In Isc tth Uc t3 Id Ic Isb Ibb kV rms kV rms kV Peak Amperes rms kA rms Seconds kV Peak µs kA Peak kA Amperes rms 360 W VAC 16 36 80 170 630 16 3 62 108 40 4 50 630 630 1250 630 630 1600 630 630 2000 1000 1000 360 W VAC 20 36 80 170 630 20 3 62 108 50 5 50 630 630 1250 630 630 1600 630 630 2000 1000 1000 360 W VAC 25 36 80 170 630 25 3 62 108 63 6 ...

Page 9: ...WISE SAME LENGTH AS 2000A CONDUCTORS 908 REF 454 300 300 1641 14 283 REF 26 75 908 454 417 417 314 5 251 137 44 CONTACT EROSION INDICATOR FLAG 293 TYP DETAIL PLAN VIEW IN DIRECTION OF ARROW X 114 158 16 MIN TRAVEL TO TRIP 49 39 7 OPEN CLOSE FLOOR TRIPPERS M O C OPERATOR SEE PLAN VIEW IN DIRECTION OF ARROW X 117 197 TOC Operator Figure 1 1 Type W VAC 36kV Circuit Breaker Outlines and Dimensions mil...

Page 10: ...ary test coupler engaged Failure to disconnect the test coupler could result in an electrical shock leading to death personal injury or property damage Do not work on a closed circuit breaker or a breaker with closing springs charged The closing springs should be discharged and the main circuit contacts open before working on the circuit breaker Failure to do so could result in cutting or crushing...

Page 11: ...eformed insulation and other components File claims immediately with the carrier if damage or loss is detected and notify the nearest Cutler Hammer Office The W VAC 36kV shipping container and pallet were specifically designed to facilitate removal of the cir cuit breaker from its pallet and container Before proceeding installation personnel should be famil iar with the procedures outlined in Para...

Page 12: ...s to be placed in storage maxi mum protection can be obtained by keeping it packed as shipped Before placing it in storage checks should be made to make sure that the circuit breaker is free from shipping damage and is in satisfactory operating condition The circuit breaker is shipped with its contacts open and closing springs discharged The indicators on the front panel should confirm this Insert...

Page 13: ...floor Indoor storage should be in a building with sufficient heat and air circulation to prevent condensation If the building is not heated the same general rule for heat as for outdoor storage should be applied 3 5 TOOLS AND ACCESSORIES Several tools and accessories both standard and optional are available for use with the circuit breaker Maintenance Tool Standard Used to charge closing springs L...

Page 14: ...8 Effective 7 97 Figure 3 4 Front View W VAC 36kV Vacuum Circuit Breaker Front Cover Lift Pull Handle Contact Erosion Indicator Flags Circuit Breaker Wheel Secondary Contact Block Alignment Rollers 3 4 1 2 5 6 1 2 5 4 3 6 ...

Page 15: ...d 10 9 11 12 13 Shock Absorber Shunt Trip Assembly Spring Release Close Coil Assembly Closing Cam Open Close Indicator Operations Counter L H Closing Spring Motor Cutoff Switch R H Closing Spring Opening Spring Manual Charge Socket Ratchet Wheel Charging Motor 1 2 5 4 3 6 1 2 5 4 3 6 7 8 10 9 11 12 13 7 8 ...

Page 16: ...tive 7 97 Figure 3 6 Rear View W VAC 36kV Vacuum Circuit Breaker Pole Unit Primary Disconnect Insulation Shroud Opening to View Contact Erosion Mark Circuit Breaker Wheel Alignment Rollers TOC Operator 1 2 5 4 3 6 1 2 5 4 3 6 7 7 ...

Page 17: ...ive 7 97 Figure 3 7 Typical W VAC 36kV Escutcheon Manual Charge Socket Spring Charged Discharged Indicator Rating Nameplate Manual Open Button Manual Close Button Open Close Indicator Operations Counter 1 2 5 4 3 6 7 1 2 5 4 3 6 7 ...

Page 18: ...ged If the springs are to be charged on a closed circuit breaker no click is heard at the end of charging operation Discontinue charging and remove the maintenance tool as soon as Charged flag is fully visible Continued attempts to charge further may result in damage to the mechanism Remove the maintenance tool Close and trip the circuit breaker Repeat several times 4 3 VACUUM INTERRUPTER INTEGRIT...

Page 19: ...he TEST position To engage the secondary contacts grasp the structure mounted secondary disconnect cage handle located below the left side of the circuit breaker and pull it for ward as far as possible to make the secondary engage ment As soon as control power is available the motor will charge the closing springs To move the circuit breaker to the CONNECTED posi tion engage the levering crank wit...

Page 20: ...cing check will be made with a compatible structure As such the instructions provid ed with the assembly will suggest other interfacing con ditions that should be observed and or checked such as primary shutter operation MOC TOC operation and lev ering handle insertion A complete coordinated inter face check therefore will be a blend of the circuit breaker instructions and those provided with the ...

Page 21: ...I B 3A74791H04 Page 15 Effective 7 97 Figure 4 2 Type W VAC Circuit Breaker Bottom View Secondary Disconnect Plug Close Floor Tripper 1 2 4 3 Trip Floor Tripper MOC Operator 1 2 4 3 ...

Page 22: ...ol circuits with all terminals being of the screw type This section describes the overall operation of the circuit breaker as well as the function and operation of all major sub assemblies and or parts 5 2 INTERRUPTER ASSEMBLY The W VAC 36kV design utilizes three individually mounted and removable pole units Each pole unit is enclosed in a four sided continuous chimney type cycloaliphatic epoxy su...

Page 23: ...al compatibility Arc interruption is simple and fast Figure 5 3 In the closed position current flows through the interrupter When the contacts are opened the arc is drawn between the contact surfaces It is moved rapidly around the slotted contact surfaces by a self induced magnetic force which prevents gross contact erosion as well as the formation of hot spots on contact surfaces The arc burns in...

Page 24: ...osion of contacts the wipe decreases A great deal of effort has been spent in the design of all Cutler Hammer vacuum circuit breakers in order to eliminate the need for field adjustments of wipe or stroke THERE IS NO PROVISION FOR IN SERVICE ADJUSTMENTS OF CONTACT WIPE AND STROKE ALL SUCH ADJUSTMENTS ARE FACTORY SET AND SHOULD NOT BE ATTEMPTED IN THE FIELD 5 3 STORED ENERGY MECHANISM KEEP HANDS AN...

Page 25: ...spring charged Figure 5 4b Breaker open and closing spring charged Figure 5 4a Breaker open and closing spring discharged Figure 5 4c Breaker closed and closing spring discharged 9 5 6 4 8 7 3 10 2 1 Cam Shaft Closing Cam Trip Latch Banana Link Pole Shaft Pole Unit Actuating Lever Shock Absorber Main Link Roller Main Link Trip Bar D Shaft ...

Page 26: ...rging operation does not affect the mechanism linkage Since the primary contacts are completely enclosed in the vacuum interrupter and not adjustable in any way a Slow Close capability is not provided with W VAC cir cuit breakers 5 3 4 TRIPPING OPERATION When the trip D shaft is turned either by the trip button or trip coil all links return to the original open condition shown in Figure 5 4a 5 4 C...

Page 27: ...d Pole Shaft Anti Close Interlock Spring Release Close Latch Spring Crank Closing Spring Closing Spring Fixed End Spring Release Close Coil Figure 5 5 Charging Schematic 9 11 5 6 4 8 7 3 10 2 1 12 Cam Shaft Motor Ratchet Lever Drive Pawl Ratchet Wheel Holding Pawl Spring Release Close Clapper Spring Release Latch Close Roller 13 14 ...

Page 28: ...TRIP COIL OPTION IS CHOSEN AND MAKE THE APPROPRIATE CONNECTIONS AUXILIARY SWITCH 2 OPTIONAL a b b a b a b a b a U24 U19 U20 U21 U22 U23 U16 U17 U18 U15 U1 U9 U8 U7 U6 U5 U4 U3 U2 U10 OPTIONS 6 M WL SPRING CHARGED INDICATING LIGHT LS1 bb 3 3A 1 2 24 4 PS2 PSI UV 14 9UV 10UV 11 FOR AC UV TRIP ONLY Figure 5 6 Typical 36kV W VAC DC and AC Control Schematics BREAKER DC CONTROL SCHEMATIC BREAKER AC CONT...

Page 29: ...values above 70 of the voltage rating of its trip coil It may operate however to open the circuit breaker when the voltage across the trip coil is greater than 35 but less than 70 of the voltage rating of its trip coil The circuit breaker can be closed as long as the voltage to the trip coil is maintained at 85 or above the rated level The undervoltage trip device is available only as an instantan...

Page 30: ...ed with the switchgear assembly Paragraph 4 8 1 of this manual provides details con cerning the use of the levering mechanism to move the circuit breaker into and out of the CONNECTED position within the assembly structure 5 7 OPERATIONS COUNTER All circuit breakers are equipped with a mechanical operations counter As the circuit breaker opens the linkage connected to the pole shaft lever advances...

Page 31: ...fective 7 97 2 3 7 8 4 6 1 5 2 5 6 4 8 7 3 2 1 Moving Clapper Stationary Yoke UV Trip Device Coil Extension Springs Trip D Shaft Lever Slotted Link Pole Shaft Lever Reset Lever Figure 5 8 Undervoltage Trip Device Configuration ...

Page 32: ... and maintain a dated permanent record of all inspections maintenance performed actions taken observations made and measurements taken Not only will this provide valuable historical information it can help to establish whether or not the present schedule needs to be adjusted 6 Perform ongoing visual inspections when possible of all equipment on a regular basis Be alert for an accumulation of dirt ...

Page 33: ...d judgment of the individual performing the work OVER TORQUING CAN CAUSE PERMANENT DAM AGE WHILE UNDER TORQUING WILL NOT PRO VIDE THE PROPER CLAMPING FORCE AND MAY EVENTUALLY WORK LOOSE Table 6 1 Torque Guidelines Bolt Size Torque N M 8 32 2 7 10 32 4 1 4 20 8 5 16 18 16 3 8 16 34 1 2 13 61 WARNING ...

Page 34: ...I B 3A74791H04 Page 28 Effective 7 97 Figure 6 1 Lubrication Points Apply one drop of light machine oil such as Mobil One at locations shown ...

Page 35: ...ed with integrity check as If integrity check is not satisfactory described in Paragraph 6 4 replace pole unit assembly Primary Disconnects No burning or damage Visual Check Replace if burned damaged or eroded 3 Control Closing and Tripping Device Smooth and correct Test closing and tripping of the Replace any defective device Circuit Including Disconnects operation by control circuit breaker twic...

Page 36: ...y elec trical charge that may be retained To avoid any ambi guity in the ac high potential test due to leakage or dis placement capacitive current the test unit should have sufficient volt ampere capacity It is recommended that the equipment be capable of delivering 25 milliamperes for one minute Although an ac high potential test is recommended a dc test may be performed if only a dc test unit is...

Page 37: ...age is 60kV rms Conduct the test as follows Close the circuit breaker Connect the high potential lead of the test machine to one of the poles of the circuit breaker Connect the remaining poles and circuit break er frame to ground Start the machine with output poten tial at zero and increase to the test voltage Maintain the test voltage for one minute Repeat for the remaining poles Successful withs...

Page 38: ...lly and electrically Check the closing and opening times to verify that they are in accordance with the limits in Table 5 1 6 11 LUBRICATION All parts that require lubrication have been lubricated during the assembly with molybdenum disulphide grease Cutler Hammer Material No 53701QB Over a period of time this lubricant may be pushed out of the way or degrade Proper lubrication at regular interval...

Page 39: ...rease 53701QB or equiv alent Rated Continuous Current amperes 630 1250 1600 2000 Resistance microohms 92 90 88 72 Table 6 3 Typical Resistance Measurements 6 12 TROUBLESHOOTING CHART Continued Next Page SYMPTOM INSPECTION AREA PROBABLE DEFECTS Fails To Close Closing Springs not charged Control Circuit Control Power fuse blown or switch off Secondary Disconnects Motor Cut off Switch Poor or burned ...

Page 40: ...tact open or burned or relay picks up Close Coil Open or burned Latch Check Switch Contact open bad switch or trip bar not reset Auxiliary Switch b contact open or burned Motor Cut off Contacts open or burned Trip Coil Assembly Clapper fails to reset Closing Sound Pole Shaft but no close Not open fully Trip Latch Reset Spring Damaged or Missing Trip Bar D Shaft Fails to remain reset Trip Latch Hat...

Page 41: ...making poor or burned Trip Coil Burned or open Terminals and Connections Poor or burned or open Trip Mechanism Trip Clapper Jammed Trip Sound Trip Mechanism Trip Bar Trip Latch But No Trip Jammed Pole Shaft Jammed Operating Rod Assembly Broken or pins out Vacuum Interrupter One or more welded Undesirably Trips Control Circuit Control Power CS T Switch remains made Mechanism Trip Coil Clapper Not r...

Page 42: ...ting information and shop order number b Describe the item give the style number and specify the quantity required c Specify the voltage for electrical components d Specify the method of shipping desired e Send all orders or correspondence to the nearest Cutler Hammer sales office LINE DESCRIPTION STYLE NUMBER QTY NO VCP W Interrupter Assembly 1 360 16 630A 16kA 3A74801H01 3 2 360 16 1250A 16kA 3A...

Page 43: ... 25kA 3A74816H01 3 13 360 32 630A 31 5kA 3A74819H01 3 14 360 32 1250A 31 5kA 3A74820H01 3 15 360 32 1600A 31 5kA 3A74821H01 3 16 360 32 2000A 31 5kA 3A74822H01 3 Charging Motor 17 48VDC 699B196G06 1 18 125VDC 120VAC 699B196G04 1 19 250VDC 240VAC 699B196G05 1 20 MOTOR BRUSH KIT 8063A77G01 1 LINE DESCRIPTION STYLE NUMBER QTY 7 1 Recommended Renewal Parts for ANSI Rated Breakers Continued Next Page ...

Page 44: ...240VAC 8237A27H02 1 Shunt Trip Coils 30 24VDC 3759A76G14 1 31 48VDC 3759A76G11 1 32 125VDC 125VAC Cap Trip 3759A76G12 1 33 250VDC 240VAC Cap Trip 3759A76G13 1 Primary Disconnects 34 600A 5680B59G01 6 35 1200A 5680B60G01 6 36 1600A 5680B61G01 6 37 2000A 692C037G03 6 UV Trip Coils 38 48VDC 8064A19G01 1 39 125VDC 8064A19G02 1 40 250VDC 8064A19G03 1 41 120VAC 8064A19G07 1 42 240VAC 8064A19G08 1 LINE D...

Page 45: ...Check Switch 699B147H04 1 45 Position Switch 699B147H01 1 46 Position Switch 3759A93H02 1 47 Auxiliary Switch 5697B20H01 1 48 Trip D Shaft 694C638G01 1 49 Trip Latch Hatchet 699B040G03 1 LINE DESCRIPTION STYLE NUMBER QTY 7 1 Recommended Renewal Parts for ANSI Rated Breakers Continued Next Page ...

Page 46: ...8796C85G03 1 53 21 35kA 8796C85G04 1 54 Shock Absorber 5677B26H01 2 55 Front Panel w o ESCN 4D13655H02 1 56 Breaker Rail Wheel 5680B22G01 4 57 Shutter Drive Roller 5680B24H02 2 58 Breaker Floor Wheel 3A74342H01 4 LINE DESCRIPTION STYLE NUMBER QTY 7 1 Recommended Renewal Parts for ANSI Rated Breakers Continued Next Page ...

Page 47: ...ss 61 Repair Kit 8796C82G01 1 Complete Replacement 62 STD 8796C82G02 1 63 With 2 AUX SW 8798C82G03 1 Undervoltage Kit 64 48VDC 8794C81G01 1 65 125VDC 8794C81G02 1 66 250VDC 8794C81G03 1 67 120VAC 8794C81G04 1 68 240VAC 8794C81G05 1 7 1 Recommended Renewal Parts for ANSI Rated Breakers Closed Open Discharged Charged ...

Page 48: ...the contract between the purchaser and Cutler Hammer NO WARRANTIES EXPRESSED OR IMPLIED INCLUDING WARRANTIES OF FITNESS FOR A PAR TICULAR PURPOSE OR MERCHANTABILITY OR WARRANTIES ARISING FROM COURSE OF DEAL ING OR USAGE OF TRADE ARE MADE REGARDING THE INFORMATION RECOMMENDATIONS AND DESCRIPTIONS CONTAINED HEREIN In no event will Cutler Hammer be responsible to the purchaser or user in contract in ...