Eaton 120W-VAC16 Page 59 Instructions For Installation, Operation And Maintenance Download

Page: 59 / 62

Instruction Book

Page 53

IB131009EN

Line No.

Description

Style

Qty

25.
(continued from
previous page)

W-VACW Pole Unit Assy

(continued from previous page)

12 kV, 1250A, 31.5kA

12 kV, 1600A, 31.5kA

12 kV, 2000A, 31.5kA

12 kV, 1250A, 40kA
12 kV, 2000A, 40kA

15 kV, 630A, 16kA

15 kV, 800A, 16kA
15 kV, 1250A, 16kA

15 kV, 630A, 20kA

15 kV, 800A, 20kA
15 kV, 1250A, 20kA

15 kV, 1600A, 20kA

15 kV, 630A, 25kA

15 kV, 800A, 25kA
15 kV, 1250A, 25kA

15 kV, 1600A, 25kA
15 kV, 2000A, 25kA

15 kV, 1250A, 31.5kA
15 kV, 2000A, 31.5kA

15 kV, 1250A, 40kA
15 kV, 2000A, 40kA

69D3313H16
69D3313H25
69D3313H29

69D3313H17
69D3313H30

69D3313H04
69D3313H10
69D3313H18

69D3313H05
69D3313H11
69D3313H19
69D3313H26

69D3313H06
69D3313H12
69D3313H20
69D3313H27
69D3313H31

69D3313H21
69D3313H32

69D3313H22
69D3313H33

3
3
3

3
3

3
3
3

3
3
3
3

3
3
3
3
3

3
3

26.

Charging Motor

699B196G03

48 VDC
100/125 VDC-110/120 VAC-50/60 Hz

699B196G01

220/250 VDC-220/240 VAC-50/60 Hz

699B196G02

27.

Motor Brush Kit

8063A77G01

28.

Spring Release Coils
48 VDC
110/125 VDC-110/120 VAC-50/60 Hz
220/250 VDC-220/240 VAC-50/60 Hz

3759A76G01
3759A76G02
3759A76G03

29.

Rectifier
110-120/220-240 VAC

3759A79G01

30.

Anti-Pump Relay
48 VDC
110/125 VDC
220/250 VDC
110/120 VAC 50/60 Hz
220/240 VAC 50/60 Hz

3759A74G03
3759A74G04
3759A74G05
3759A74G05
3759A74G02

Summary of Contents for 120W-VAC16

Page 1: ...VAC Breaker Element W VAC 3150A Breaker with Carriage Assembly for Single Tier Switchgear W VAC Breaker with Carriage Assembly for Single Tier Switchgear W VAC Breaker with Cradle Assembly for Double Tier Switchgear ...

Page 2: ......

Page 3: ...ODILY INJURY AND PROPERTY DAM AGE ALL SAFETY CODES SAFETY STANDARDS AND OR REGULATIONS AS THEY MAY BE APPLIED TO THIS TYPE OF EQUIPMENT MUST BE STRICTLY ADHERED TO THESE CIRCUIT BREAKER ELEMENTS ARE DESIGNED TO BE INSTALLED PURSUANT TO THE AMERICAN NATIONAL STANDARDS INSTITUTE ANSI SERIOUS INJURY INCLUDING DEATH CAN RESULT FROM FAILURE TO FOLLOW THE PROCE DURES OUTLINED IN THIS MANUAL THESE CIR CU...

Page 4: ... SECTION 5 DESCRIPTION AND OPERATION 5 1 Interrupter Assembly 26 5 1 1 Vacuum Interrupter 26 5 1 2 Contact Erosion Indicator Except 3150A 27 5 1 3 Contact Erosion Indicator 3150A Only 27 5 1 4 T Cutout Loading Spring Indicator 28 5 1 5 Contact Wipe and Stroke 28 5 1 6 Pole Unit Support Molding 28 5 2 Stored Energy Mechanism 29 5 2 1 Operation of Stored Energy Mechanism 29 5 2 2 Charging 29 5 2 3 C...

Page 5: ...ly Outline Dimensions millimeters Weights kg 5 1 4 Type W VACR 800 1250A Breaker Element Only Outline Dimensions millimeters Weights kg 6 1 5 Type W VACR 800 1250A Breaker Element Only Outline Dimensions millimeters Weights kg 7 1 6 Type W VACR 2000A Breaker Element Only Outline Dimensions millimeters Weights kg 8 1 7 Type W VACR 2500A Breaker Element Only Outline Dimensions millimeters Weights kg...

Page 6: ...onfiguration 35 5 9 Closeup of Type W VACW Breaker Vacuum Interrupters and Current Carrying System 36 6 1 Lubrication Points 37 6 2 Vacuum Interrupter Showing Contact Erosion Indicator With Breaker Open 40 6 3 Vacuum Interrupter Showing Contact Erosion Indicator With Breaker Closed 40 6 4 Breaker Shown Closed and Interrupter Erosion Satisfactory 3150A 41 6 5 Breaker Shown Colsed and Interrupter Er...

Page 7: ...hstand Voltage kV Hz kA Sec kV kV kA Peak Amperes 36W VAC25 3 6 50 60 25 3 40 10 63 630 1250 2000 3150 72W VAC16 7 2 50 60 16 3 60 20 40 630 800 1250 72W VAC20 7 2 50 60 20 3 60 20 50 630 800 1250 1600 72W VAC25 7 2 50 60 25 3 60 20 63 630 800 1250 1600 2000 3150 72W VAC32 7 2 50 60 31 5 3 60 20 79 1250 2000 72W VAC40 7 2 50 60 40 3 60 20 100 3150 120W VAC16 12 50 60 16 3 75 28 40 630 800 1250 120...

Page 8: ... 3 60 20 40 630 800 1250 72W VACR20 7 2 50 60 20 3 60 20 50 630 800 1250 72W VACR25 7 2 50 60 25 3 60 20 63 630 800 1250 2000 72W VACR32 7 2 50 60 31 5 3 60 20 80 1250 2000 72W VACR40 7 2 50 60 40 3 60 20 100 1250 2000 120W VACR16 12 50 60 16 3 75 28 40 630 800 1250 120W VACR20 12 50 60 20 3 75 28 50 630 800 1250 120W VACR25 12 50 60 25 3 75 28 63 630 800 1250 2000 120W VACR32 12 50 60 31 5 3 75 2...

Page 9: ...IB131009EN Instruction Book Page 3 630A Element 630A 105kg Figure 1 1 Type W VACR 630A breaker element only outline dimensions millimeters and weights kilograms ...

Page 10: ...IB131009EN Instruction Book Page 4 630A Element 630A 105kg Figure 1 2 Type W VACR 630A breaker element only outline dimensions millimeters and weights kilograms ...

Page 11: ...IB131009EN Instruction Book Page 5 800 1250A Element 800A 1250A 110kg Figure 1 3 Type W VACR 800 1250A breaker element only outline dimensions millimeters and weights kilograms ...

Page 12: ...IB131009EN Instruction Book Page 6 800 1250A Element 800A 1250A 110kg Figure 1 4 Type W VACR 800 1250A breaker element only outline dimensions millimeters and weights kilograms ...

Page 13: ...IB131009EN Instruction Book Page 7 2000A Element 2000A 149kg Figure 1 5 Type W VACR 2000A breaker element only outline dimensions millimeters and weights kilograms ...

Page 14: ...IB131009EN Instruction Book Page 8 2000A Element 2000A 149kg Figure 1 6 Type W VACR 2000A breaker element only outline dimensions millimeters and weights kilograms ...

Page 15: ...IB131009EN Instruction Book Page 9 2500A Element 2500A 154kg Figure 1 7 Type W VACR up to 2500A 50kA breaker element only outline dimensions millimeters and weights kg ...

Page 16: ...age 10 Up to 1250A Element 630A 115kg 800A 1250A 121kg Front View Side View Front View 1600A 2000A Elements 1600A 2000A 160kg Side View Figure 1 8 Type W VAC breaker element only outline dimensions millimeters and weights kilograms ...

Page 17: ...9 350 1299 1275 1340 200 620 33 33 3 A 570 G 197 202 373 F F C POLE A POLE B POLE Earthing Contacts 440 701 44 6 269 84 4 456 6 538 48 3 228 3 Rating A B C D E F G Weight Carriage Upto15kV Upto1250Ato40kA 490 300 786 762 738 165 470 23 Upto15kV 1600Aand2000A Upto40kA 640 350 856 835 736 200 620 25 Figure 1 9 Outline and Dimensions mm Type W VAC breaker element with carriage assembly and cradle ass...

Page 18: ...IB131009EN Instruction Book Page 12 Figure 1 10 Outline and Dimensions mm Type W VAC 3150 breaker with carriage assembly ...

Page 19: ... circuits and equipment should be permitted to work on these breakers Read these instructions carefully before attempting any installation operation or maintenance of these breakers Always remove the removable breakers from their enclosures or disconnect the fixed primary connections associated with fixed breakers before performing any maintenance Failure to do so could result in electrical shock ...

Page 20: ...any signs of damage or rough handing Open the con tainer carefully to avoid any damage to the contents When opening the container be careful that any loose items or hardware are not discarded with the packing material Check the contents of each package against the packing list Examine the breaker for any signs of shipping damage such as broken missing or loose hardware damaged or deformed insulati...

Page 21: ...rage checks should be made to make sure that the breaker is free from shipping dam age and is in satisfactory operating condition The breaker is shipped with its contacts open and clos ing springs discharged The indicator on the front panel should confirm this Insert the maintenance tool in the manual charge socket opening Figures 3 2 and 4 1a Charge the closing springs by pumping the handle up an...

Page 22: ...e 16 Front Panel Manual Charge Socket Open Closed Indicator Spring Charged Discharged Indicator Operation Counter Rating Nameplate Manual Open Button Manual Close Button Figure 3 2 Type W VAC breaker element faceplate 1 2 3 4 5 6 8 7 ...

Page 23: ...witch Motor Cutoff Switch Closing Cam Spring Release Close Coil Assembly Shunt Trip Assembly Position Switch 8 Charging Motor Charging Pawl 11 Ratchet Wheel 12 R H Closing Spring 13 Opening Spring 14 Manual Charge Socket 15 Secondary Disconnect 16 Operation Counter Figure 3 3 Front external view of W VAC breaker element ...

Page 24: ...5 9 8 6 7 Secondary Disconnect Lifter Yoke Opening Support Insulator Primary Disconnect Vacuum Interrupter Contact Loading Spring Wipe Spring Operating Rod Drive Insulator Flexible Connector Figure 3 4 Rear external view of W VAC breaker element ...

Page 25: ...4 Rear View Mechanism Enclosure Support Insulator Primary Disconnect Levering in Screw Carriage Carriage Wheel Shoot Bolt Lever Shutter Operator Levering Device Socket Figure 3 5 Side and rear external view W VAC breaker with carriage assembly for single tier switchgear ...

Page 26: ...ism Enclosure Support Insulator Primary Disconnect Levering in Screw Cradle Cradle Wheel Shutter Operator Levering Device Socket Shoot Bolt Lever Earthing Contact Figure 3 6 Front and rear external view W VAC breaker with cradle assembly for double tier switchgear ...

Page 27: ...hanism Enclosure Support Insulator Primary Disconnect Levering in Screw Carriage Rear View Carriage Wheel Shoot Bolt Lever Shutter Operator Levering Device Socket Figure 3 7 Front and rear external view W VAC 3150A breaker with carriage assembly for single tier switchgear ...

Page 28: ...nually charge the closing springs and close the breaker Check contact erosion and wipe as described in Section 6 5 4 6 PRIMARY CIRCUIT RESISTANCE Check the primary circuit resistance as described in Section 6 8 The resistance should not exceed the val ues specified Record the values obtained for future ref erence 4 7 NAMEPLATE Compare the breaker nameplate information with switchgear drawings for ...

Page 29: ...g the maintenance tool into the manual charging socket b Lifting shoot lever permits insertion of levering crank c Manually closing the breaker d Manually tripping the breaker Figure 4 1 Type W VAC breaker manual operation single tier breaker shown ...

Page 30: ... interlock prevents releasing the closing springs electrically or manually if the breaker is already closed drawout and fixed configurations d Anti Latch Interlock This interlock prevents the breaker from being closed between the Connected and Test positions e Shutter Drive Interlock The metallic switchgear shutters are independently operated permitting them to be locked in the open posi tion for ...

Page 31: ...sembly version lift the shoot bolt lever and pull the breaker out The breaker will close and trip as it comes out from the Test position 2 For the double tier configuration cradle assembly version retract the horizontal shoot bolts and pull the breaker out The breaker will close and trip as it comes out from the Test position ...

Page 32: ...racked into the fully connected position Possibility 3 The basic breaker element combined with a cradle assembly is used for double tier switchgear This combination is only for use in a behind the door configuration Figure 5 2 W VAC breakers utilize Eaton vacuum inter rupters to close and open the primary circuit The mech anism is a front mounted spring stored energy type which is common to all ra...

Page 33: ... is very minimal over time with Eaton vacuum interrupters utilizing copper chrome contact material If contact erosion reaches 1 8 inch the interrupter must be replaced A contact erosion indicator mark is located on the moving stem of the interrupter Figures 6 2 and 6 3 In order to determine if the contacts have eroded to the extent that the interrupter must be replaced close the breaker and observ...

Page 34: ...n is used to close the contacts i e stroke and the remainder is used to further compress the preloaded wipe spring This additional compression is called wipe Wipe and Stroke are thus related to each other As the stroke increases due to the erosion of contacts the wipe decreases A great deal of effort has been spent in the design of all Eaton vacuum breakers in order to eliminate the need for field...

Page 35: ... front accessi ble Motion to close and open the interrupter contacts is provided through operating rods connecting the mecha nism pole shaft to the bell cranks of the interrupter assemblies 5 2 1 OPERATION OF STORED ENERGY MECHANISM The mechanism stores the closing energy by charging the closing springs The mechanism may rest in any one of the four positions shown in figure 5 5 and as follows a Br...

Page 36: ...pring discharged Figure 5 5c Breaker closed and closing spring discharged Figure 5 5d Breaker closed and closing spring charged Pole Shaft Main Link Banana Link Trip Latch ShuntTripLever ShuntTripCoil Cam Shaft Closing Cam Operating Rod MainLinkRoller 11 TripBar D Shaft 12 Trip Latch Reset Spring Figure 5 5 Closing cam and trip linkage ...

Page 37: ...arged PoleShaft Anti CloseInterlock SpringRelease Close Latch SpringCrank Closing Spring ClosingSpringFixedEnd SpringRelease Close Coil Cam Shaft Motor Ratchet Lever DrivePawl 11 Ratchet Wheel 12 Holding Pawl 13 Spring Release Close Clapper 14 SpringReleaseLatch CloseRoller Figure 5 6 Charging schematic ...

Page 38: ...is opened The Y b contact opens the SR circuit so that even though the breaker would subsequently open it could not be reclosed before CS C was released and remade This is the anti pump function 5 3 1 TIMING The opening and closing times for the circuit breakers vary depending upon the control voltage and the power rating However the typical values are as follows in Table 5 1 Table 5 1 Typical Ope...

Page 39: ...ce coil has at least 85 of the rated voltage applied the moving clapper is held to the yoke by the magnetic force even though the reset lever has moved up 5 4 INTERLOCKS NEVER DISABLE OR DEFEAT ANY INTERLOCKS HAZARDOUS VOLTAGES WILL CAUSE DEATH SEVERE PERSONAL INJURY OR PROPERTY DAM AGE All W VAC and W VACW breakers are equipped with several interlocks These interlocks permit proper and safe break...

Page 40: ...Instruction Book Page 34 IB131009EN Figure 5 7 Typical DC and AC control schemes ...

Page 41: ...truction Book Page 35 IB131009EN MovingClapper StationaryYoke UVTripDeviceCoil ExtensionSprings Trip D Shaft Lever Slotted Link PoleShaftLever Reset Lever Figure 5 8 Undervoltage trip device configuration ...

Page 42: ...TTED BY THIS INSTRUCTION BOOK ADDITIONS CHANGES OR ALTERATIONS MADE THAT ARE NOT SPECIFI CALLY ADDRESSED IN THIS INSTRUCTION BOOK AND NOT IN KEEPING WITH APPLICABLE IEC STANDARDS AND ACCEPTED ELECTRICAL PRAC TICES COULD RESULT IN EQUIPMENT DAMAGE INJURY OR DEATH 5 7 1 ELECTRICAL CLEARANCES It is the responsibility of the customer to insure that the proper electrical clearances are maintained on th...

Page 43: ...ar when operating in a clean non corrosive environment For a dusty and cor rosive environment inspection should be performed twice a year Additionally it is recommended to inspect the breaker every time it interrupts fault current Refer to the table on the following page for maintenance and inspection check points 6 4 VACUUM INTERRUPTER INTEGRITY TEST Vacuum interrupters used in all circuit breake...

Page 44: ...n therightinsideofthepole unit support see Figure 6 4 Use the erosion gauge to inspect the erosion level see Figure 6 5 If the erosion gauge pointer 3150Aonly isalignedorabove erosion mark replace pole unit assembly Contact wipe visible Visual Figures6 6 6 7 Replacepole unit assembly Adequate Vacuum See Section 6 4 Replacepole unit assembly Dirtonceramicbody Visual Check Cleanwithdrylint freecloth...

Page 45: ...pri ate test voltage and maintain for one minute Successful withstand indicates that all interrupters have satisfactory vacuum level If there is a breakdown the defective interrupter or interrupters should be identified by an individual test and replaced before placing the breaker in service AFTER THE HIGH POTENTIAL IS REMOVED AN ELECTRICAL CHARGE MAY BE RETAINED BY THE VACUUM INTERRUPTERS FAILURE...

Page 46: ... pole unit assembly must be replaced Figures 6 2 and 6 3 Figure 6 3 Vacuum interrupter showing contact erosion indicator with breaker closed indicators are checked only when breaker is closed 6 5 1 CONTACT EROSION 3150A ONLY In order to determine if the contacts of a 3150 ampere breaker have eroded to the extent that the interrupter must be replaced close the breaker and observe the erosion mark o...

Page 47: ...tage of the breaker For the breakers rated 12kv and 15 kv the test voltages are 21 kv and 27 kv rms respectively Conduct the test as fol lows Close the breaker Connect the high potential lead of the test machine to one of the poles of the breaker Connect the remaining poles and breaker frame to ground Start the machine with output potential at zero and increase to the test voltage Maintain the tes...

Page 48: ...y loose parts such as bolts nuts pins and rings Check for excessive wear or damage to the breaker components Operate the breaker several times manu ally and electrically Check the closing and opening times to verify that they are in accordance with the limits in Table 5 1 6 9 1 CLOSURE TEST Introduction The CloSureTM Test is a simple yet extremely effective means to determine and monitor the abili...

Page 49: ...rged AND THE MAIN CONTACT INDICATOR SHOWS Open Figure 6 9 Step 2 Remove the circuit breaker front cover Be sure to save the original fasteners for reassembly Step 3 Cut a piece of one inch wide drafting masking tape approximately 8 to 10 inches long Step 4 Place the tape around the cam starting from the bottom up Make certain that the tape adheres well to the cam surface See Figures 6 9 6 10 and 6...

Page 50: ...ure 6 8 Status Indicators A shows the contact status indication and B shows the spring indication Figure 6 12 Attaching CloSureTM Test Tool at Hole A Figure 6 9 Starting Tape at Bottom of Cam Figure 6 10 Wrapping Tape Up Around Cam Figure 6 13 Attaching CloSureTM Test Tool at Hole B A A B ...

Page 51: ...rings Figure 6 15 Manually Closing Circuit Breaker with Marker in Hole C Figure 6 17 Move Marker 15o to Right Figure 6 18 Move Marker 15o to Left Figure 6 16 Top View of Cam and Marker Interface Figure 6 19 Remove Marked Masking Tape from Cam C Cam ClosureTM Tool Marker 15o 15o ...

Page 52: ... A 3 A 4 C 2 C 1C 3 C 4 C 5 C 6 B 1 B 2 Width B Figure not to scale Note Use the center of the marker diameter to determine X distance 8 0 to 10 inches X Inches CloSureTM Overtravel CloSureTM Distance CloSureTM Position A C 5 3 16 Approx Date of Breaker Operations CloSure TM Distance Date of Breaker Operations CloSure TM Distance Breaker Line Approximate Mechanism Cabinet Width inch Upper Mounting...

Page 53: ...ly should be effective for many years They should not be disturbed unless there is definite evidence of sluggishness dirt or parts are dis mantled for some reason If it becomes necessary to disassemble the mecha nism the bearings and related parts should be thor oughly cleaned Remove old grease in a good grease solvent Do not use carbon tetrachloride They should then be washed in light machine oil...

Page 54: ...n bad switch or trip bar not reset Auxiliary Switch bcontactopenorburned Motor Cut off Contacts open or burned Trip Coil Assembly Clapper fails to reset PoleShaft Notopenfully Trip Latch Reset Spring Damaged or Missing ClosingSound butnoclose Trip Bar D Shaft Fails to remain reset TripLatch Hatchet Fails to remain reset Trip Floor Tripper Fails to remain reset Close Latch Binding CloseLatchRoller ...

Page 55: ... or open TerminalsandConnections Poororburnedoropen Trip Mechanism Trip Clapper Jammed Trip Bar Trip Latch Jammed Trip Sound Trip Mechanism PoleShaft Jammed OperatingRodAssembly Brokenorpinsout Vacuum Interrupter One or more Welded Undesirably Trips Control Circuit Control Power SD T Switch remains made Mechanism TripCoilClapper Not resetting TripBarorTripLatch Poor engagement of mating or worn su...

Page 56: ... voltage for electrical components d Specify the method of shipping desired e Send all orders or correspondence to the nearest Eaton sales office Table 7 1 Recommended W VAC W VACR and W VACW Spare Parts Line No Description Style Qty 1 W VACRPoleUnitAssy 4D13307G31 3 Up to12 kV 25kA 75 kV BIL 630 800A 3inchVI 630 800A 4inchVI 4D13307G11 3 1250A 3inchVI 4D13307G32 3 1250A 4inchVI 4D13307G12 3 2 W V...

Page 57: ...25 kA75 kV BIL 4D13307G02 3 12 W VAC Pole Unit Assy 1250A Upto12kV 31 5and40kA 75kVBIL 4D13307G03 3 13 W VAC Pole Unit Assy 1250A Upto12kV 40kA 75kVBIL 4D13307G05 3 14 W VAC Pole Unit Assy 2000A Upto12kV 31 5and40kA 75kVBIL 4D13307G04 3 15 W VAC Pole Unit Assy 630A Up to15 kV 25kA 95 kV BIL Plus Cover 4D13307G01 4D13343H01 3 16 W VAC Pole Unit Assy 1250A Upto15kV 31 5kA 95kVBIL Plus Cover 4D13307G...

Page 58: ... Assy All 3150A 69D3312G01 3 3 6kV 25kA 7 2kV 25kA 69D3312G02 3 7 2kV 40kA 69D3312G03 3 12kV 25kA 69D3312G04 3 12kV 40kA 69D3312G05 3 12kV 50kA 69D3312G06 3 15kV 25kA 69D3312G07 3 15kV 40kA 69D3312G08 3 15kV 50kA 69D3312G09 3 17 5kV 25kA 69D3312G10 3 17 5kV 40kA 69D3312G11 3 24 W VACWPoleUnitAssy 69D3313H01 3 continued on nextpage 12 kV 630A 16kA 12 kV 800A 16kA 69D3313H07 3 12 kV 1250A 16kA 69D33...

Page 59: ...H25 69D3313H29 69D3313H17 69D3313H30 69D3313H04 69D3313H10 69D3313H18 69D3313H05 69D3313H11 69D3313H19 69D3313H26 69D3313H06 69D3313H12 69D3313H20 69D3313H27 69D3313H31 69D3313H21 69D3313H32 69D3313H22 69D3313H33 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 26 Charging Motor 699B196G03 1 48 VDC 100 125VDC 110 120VAC 50 60Hz 699B196G01 1 220 250VDC 220 240VAC 50 60Hz 699B196G02 1 27 MotorBrushKit 8063...

Page 60: ...19G02 1 220 250 VDC 8064A19G03 1 120 VAC 8064A19G09 1 240 VAC 8064A19G10 1 33 Motor Cut Off Switch 5677B02G05 1 34 LatchCheckSwitch 699B147G01 1 35 Position Switch 1 Position Switch 2 8064A03G01 3759A93G01 1 36 Auxiliary Switch Push On 698B822H01 1 37 Trip D Shift 694C638G01 1 38 Trip Latch Hatchet 699B040G03 1 39 Cluster Assembly 699B104G02 6 630A 800 1250A 508B022G02 6 1600 2000A 5677B31G11 6 40...

Page 61: ......

Page 62: ...Instruction Book Instructions for Installation Operation and Maintenance of Types W VAC W VACR and W VACW Vacuum Circuit Breakers ...

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