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Equipment Description

01.4IB.77000B

PowlVac-ND® Vacuum Circuit Breaker

Figure 3

Cam and Fundamental Linkage Positions

a) Breaker Open - Spring Charged - Links Reset

b) Breaker Closed - Spring Discharged

c) Breaker Open - Spring Discharged

d) Breaker Closed - Spring Charged

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Содержание POWELL PowlVac-ND

Страница 1: ...01 4IB 77000B PowlVac ND Vacuum Circuit Breaker 5kV 1200A 2000A 36kA 50kA Powered by Safety ...

Страница 2: ...00B PowlVac ND Vacuum Circuit Breaker Powered by Safety Contact Information Powell Electrical Systems Inc powellind com info powellind com Service Division PO Box 12818 Houston Texas 77121 2818 713 944 6900 phone 713 948 4569 fax ...

Страница 3: ... without the safety alert symbol is used to address practices not related to personal injury CAUTION NOTICE NOTICE is used to address practices not related to personal injury Qualified Person For the purposes of this manual a qualified person as stated in NFPA 70E is one who has skills and knowledge related to the construction and operation of the electrical equipment and installations and has rec...

Страница 4: ...Powered by Safety 4 01 4IB 77000B PowlVac ND Vacuum Circuit Breaker This page is intentionally left blank ...

Страница 5: ...losed Door Racking Mechanism 18 D Circuit Breaker Compartment Interfaces 18 1 Primary Disconnecting Devices 18 2 Secondary Disconnecting Devices 19 3 MOC Mechanism Operated Cell Switch Actuator 19 4 TOC Truck Operated Cell Switch Actuator 19 5 Ground Connection 19 6 Shutter Rollers 19 7 Anti Rollout Latch 19 E Vacuum Interrupters 20 F Vacuum Interrupter Connections 20 Ch 4 Installation 21 A Receiv...

Страница 6: ...aning 35 B Mechanism Area 36 1 Mechanical Operation 36 2 Lubrication 36 3 Closing Spring Removal 40 4 Slow Closing of Mechanism 41 5 Mechanism Adjustments 41 6 Electrical Operation 46 C Vacuum Interrupter and Contact Area 46 1 Vacuum Interrupter and Contact Erosion 46 2 Sliding Contact Finger Wear 47 3 Vacuum Integrity 47 4 MechanicalAdjustmentofVacuumInterrupters 47 D Optional Maintenance Procedu...

Страница 7: ...Test Position 32 Figure 13 Racking Handle Insertion 32 Figure 14 Circuit Breaker Removal Applying the Anti Rollout Latch 33 Figure 15 Lubrication 38 Figure 16 Lubrication cont 39 Figure 17 Main Closing Spring Assembly Compressed for Removal 40 Figure 18 Main Closing Spring Assembly Installed 40 Figure 19 Primary Secondary Trip Prop Adjustment 42 Figure 20 Feeler Gauge 43 Figure 21 Latch Check Swit...

Страница 8: ...Powered by Safety iv 01 4IB 77000B PowlVac ND Vacuum Circuit Breaker This page is intentionally left blank ...

Страница 9: ... servicing maintenance or any act requiring the operator to make physical contact with the equipment the power source must be disconnected and the equipment grounded Failure to do so may result in death or serious injury NOTICE The information in this instruction bulletin is not intended to explain all details or variations of the Powell equipment nor to provide for every possible contingency or h...

Страница 10: ... to aid in showing component locations All illustrations and photos are shown using deenergized equipment Follow the appropriate safety precautions while handling any of the equipment Failure to do so may result in death or serious injury WARNING To the extent required the products described herein meet the applicable ANSI IEEE and NEMA Standards however no such assurance is given with respect to ...

Страница 11: ...rogram The rules are intended to cover only some of the important aspects of personnel safety related to PowlVac ND circuit breakers Ch 2 Safety A Safe Work Condition The information in Section A is quoted from NFPA 70E 2012 Article 120 120 1 Establishing an Electrically Safe Work Condition 120 1 Process of Achieving an Electrically Safe Work Condition 1 Determine all possible sources of electrica...

Страница 12: ...service and remove it from the metal clad switchgear 2 DO NOT WORK ON A CIRCUIT BREAKER WITH THE CONTROL CIRCUIT ENERGIZED 3 EXTREME CARE MUST BE EXERCISED TO KEEP ALL PERSONNEL TOOLS AND OTHER OBJECTS CLEAR OF MECHANISMS WHICH ARE TO BE OPERATED DISCHARGED OR RELEASED These circuit breakers utilize stored energy mechanisms These mechanisms must be serviced only by skilled and knowledgeable person...

Страница 13: ... cover construction are between the test personnel and the vacuum interrupters and that the test personnel be no closer than one meter 3 from the front of the circuit breaker THE CIRCUIT BREAKER SHALL BE EITHER FULLY OPEN OR FULLY CLOSED WHEN MAKING HIGH POTENTIAL TESTS DO NOT TEST WITH CONTACTS PARTIALLY OPEN F Safety Labels The equipment described in this document has DANGER WARNING CAUTION and ...

Страница 14: ...mblies through operating pushrods Figure 1 ak In the same metal enclosed compartment as the stored energy mechanism is the circuit breaker racking mechanism and interlocks which control the movement of the circuit breaker between the test disconnected and connected positions The racking mechanism Figure 7 provides the motion to engage disengage the primary disconnecting devices and to open close t...

Страница 15: ...ch advance from the drive pawl To ensure correct synchronization of the drive and holding pawl the position of the holding pawl support arms are adjustable by the holding pawl adjusting eccentric Figure 2 aa located at the left front of the mechanism When the mechanism is operated manually the top pawl becomes the drive pawl and the bottom pawl becomes the holding pawl The ratchet wheel Figure 2 q...

Страница 16: ...ions Counter m Spring Charge Indicator n Secondary Disconnect Guide Sleeve o Anti Rollout Latch p MOC Actuator q Standoff Insulator r Vacuum Interrupter Support s TOC Acutator t Upper Primary Disconnecting Device u Vacuum Interrupter v Lower Primary Disconnecting Device w Frame x Ground Connection y Serial Number Plate Location z Wheel aa Crank Arm Roller ab Racking Crank Arm ac Worm Gear ad Racki...

Страница 17: ...ng Screw j Charging Motor Drive Shaft k Motor Cutoff Switch l Secondary Trip Prop m Main Cam Roller n Camshaft o Main Closing Cam p Reset Spring q Ratchet Wheel r Pawl Lift Plate s Close Latch Arm t Drive Pawl u Close Latch Shaft v Pawl Support Arm w Latch Check Switch x Secondary Trip Prop Adjusting Screw y Jackshaft z Holding Pawl Support Arm aa Holding Pawl Adjusting Eccentric ab Crank Arm ac C...

Страница 18: ...ion 01 4IB 77000B PowlVac ND Vacuum Circuit Breaker Figure 3 Cam and Fundamental Linkage Positions a Breaker Open Spring Charged Links Reset b Breaker Closed Spring Discharged c Breaker Open Spring Discharged d Breaker Closed Spring Charged ...

Страница 19: ...Prop Adjusting Screw b Secondary Trip Prop Shaft c Secondary Trip Prop d Secondary Linkage Roller e Main Cam Roller f Reset Spring g Camshaft h Main Closing Cam i Center Phase Operating Lever j Jackshaft k Primary Trip Prop Roller l Primary Trip Prop Adjusting Screw m Primary Trip Prop l c b d e f g h i j k a m ...

Страница 20: ...to a value sufficient to resist vacuum interrupter contact separation under the highest electromagnetic forces exerted by the rated short circuit current Further movement of the operating pushrod assembly compresses the contact loading spring even more and produces a gap between the face of the spring yoke and the lock nut For each phase bell cranks Figure 1 af are located on the outside of the lo...

Страница 21: ...S LS PREVENTS CLOSE COIL MOTOR M DE ENERGIZED ENERGIZED WHITE LIGHT LS BREAKS MAKES LS CHARGED CLOSE SPRING VCB CLOSED BREAKS 52 b Y COIL ENERGIZED DE ENERGIZED CLOSE COIL CC ENERGIZATION BEFORE FULLY CHARGED SPRING IS RELEASED SWITCH IS BEFORE CONTROL IF VCB TRIPS PUMPING PREVENTS BREAKS Y CONTACT MAKES Y CONTACT Y COIL SEALS IN LS BREAKS MAKES LS 52 a MAKES GREEN LIGHT DE ENERGIZED BREAKS 52 b E...

Страница 22: ...VDC CC Y LS 12 K 10 10 RES 52 a 52 a 52 b 52 b 1 2 3 5 7 4 6 8 1 3 5 7 2 4 6 8 9 10 3 4 13 14 12 11 18 16 17 15 52 a 52 b 15 19 21 23 16 20 22 24 15 19 16 20 Pins Not Used Pins Not Used LEGEND LS Spring Charge Limit Switch Shown with Spring Discharged LCS Latch Check Switch Shown with Spring Discharged Y Anti Pump Relay TC Breaker Trip Coil CC Breaker Close Coil M Charging Motor Breaker Auxiliary ...

Страница 23: ...s can fall into the reset position The reset spring stretches between an extension of the main cam roller pin and a spring support pin located on the left mechanism side sheet The latch check switch Figure 2 w operated by a lever on the trip shaft will close as the secondary trip prop reaches the fully reset position 2 Electrical Description a Charging Motor The function of the charging motor Figu...

Страница 24: ...ll control schemes is shown in Figure 5 Circuit breaker mounted auxiliary contacts not used in the control circuit are brought out for control and indication functions The metal clad switchgear equipment may provide a circuit breaker MOC Mechanism Operated Cell Switch for additional contacts C Racking Mechanism 1 General Description The racking mechanism is the mechanical assembly that facilitates...

Страница 25: ...and a tripping linkage and roller on the right side of the frame of the circuit breaker that interfaces with the circuit breaker compartment An interlock bar prevents the rotation of the racking drive shaft extension whenever the circuit breaker is closed or the secondary disconnect plug is removed This prevents movement of the circuit breaker when the circuit breaker is closed or when the control...

Страница 26: ...f the connected position This action also operates the compartment shutters The two bolts on the left side sheet and the one bolt on the right side sheet serve as a positive stop to the crank arm This positive stop prevents further rotation of the racking shaft thus stopping circuit breaker travel At this time the breaker position indicator on the front of the circuit breaker will display CONN Fig...

Страница 27: ...ion is an assembly of spring loaded fingers that effectively grounds the circuit breaker frame as it is inserted into the circuit breaker compartment The ground connection Figure 1 x is located at the rear edge of the floor pan of the circuit breaker centered on the middle pole of the circuit breaker An extension of the metal clad switchgear ground bus is secured to the circuit breaker compartment...

Страница 28: ...H NEW VACUUM INTERRUPTERS OF THE SAME PART NUMBER F Vacuum Interrupter Connections Connection to the vacuum interrupter stems is made by means of copper contact blocks The top stem of the vacuum interrupter is threaded and a copper contact block is screwed onto this stem The contact block is assembled to the upper primary disconnecting devices of the circuit breaker Another copper contact block wi...

Страница 29: ...cases the circuit breaker will be in the test disconnected position and it will be bolted to the compartment floor by use of a shipping bracket The horizontal leg of the bracket is bolted to the compartment floor and the vertical leg is bolted to the front of the circuit breaker using the lower cover bolts Remove these four bolts discard the shipping angle and replace the four bolts B Handling Aft...

Страница 30: ...asis to assure its integrity 3 The auxiliary control devices ship loose material and protective relays must also be protected This includes items such as battery chargers UPS systems lighting installation hardware and air conditioning If prolonged storage is anticipated humidity controlling desiccant materials should be utilized Desiccant packets should be installed in all compartments and packing...

Страница 31: ...tential test described below is strongly recommended DC testing is not the preferred method however values are provided due to the availability of DC test sets CAUTION If DC high potential is performed the DC high potential test machine must NOT produce instantaneous peak voltages exceeding 20kV The circuit breaker insulation should be tested with the circuit breaker vacuum interrupter contacts in...

Страница 32: ...ee Ch 4 Installation D Placing the Circuit Breaker Into Service 1 High Voltage Insulation Integrity Powell offers a compact and lightweight PowlVac Vacuum Integrity Tester designed specifically for PowlVac circuit breakers If this device is used refer to the instruction bulletin provided with the vacuum integrity tester Powell recognizes the widespread use of DC hipot equipment in the field and th...

Страница 33: ...significant correlation After the high potential is removed an electrical charge may be retained by the vacuum interrupters Failure to discharge this residual electrostatic charge could result in an electrical shock All six primary disconnecting devices of the circuit breaker and the metallic mid band ring if present should be grounded and remain grounded for at least one minute to reduce this ele...

Страница 34: ... manual charging handle into the manual charging crank and pushing down until a metallic click is heard this indicates that the holding pawl has dropped into place on the ratchet wheel Lift the handle until it is horizontal and then depress The procedure is repeated until the spring charge indicator indicates CLOSING SPRING CHARGED This requires about 60 operations of the handle Once the closing s...

Страница 35: ...e charging motor to operate again and charge the main closing spring Operating the control switch on the front door of the test cabinet to the open position will cause the circuit breaker to open Alternatively a test jumper cable may be used to electrically operate the circuit breaker using the control circuitry of the circuit breaker compartment Caution must be exercised if this option is chosen ...

Страница 36: ... the operation of the interlocks as described in Ch 3 Equipment Description C Racking Mechanism 1 General Description b Interlocking Once again insert the racking handle onto the racking drive shaft extension and rotate in a counterclockwise direction until the racking crank arms are once more in the fully withdrawn position and the breaker position indicator displays TEST With the racking crank a...

Страница 37: ...and Cleaning and Ch 5 Maintenance B Mechanism Area 2 Lubrication for cleaning and lubrication procedures If the primary disconnecting devices are damaged make no attempt to repair Contact Powell for further information Examine the circuit breaker compartment to see that it is clean and clear of debris that might interfere with circuit breaker travel b Racking the Circuit Breaker into the Circuit B...

Страница 38: ...circuit breaker open closed indicator displays BREAKER OPEN and if not press the manual trip operator to open the circuit breaker b To insert the circuit breaker into the lower circuit breaker compartment open the compartment door and align the wheels with the floor pan channels of the compartment Verify that the floor pan channels are free of debris prior to inserting the circuit breaker c Roll t...

Страница 39: ... the movement of the racking crank arms is only opening the shutters Once the shutters are open the circuit breaker begins to move toward the stationary primary disconnecting devices When the movable primary disconnecting devices of the circuit breaker engage with the stationary primary disconnecting devices of the compartment the force required to rotate the racking handle will increase appreciab...

Страница 40: ...reaker Position Indicator b Test Position c Racking Mechanism Retainer Assembly Figure 13 Racking Handle Insertion b a a Racking Drive Shaft Extension b Racking Handle F Removing the Circuit Breaker From the Circuit Breaker Compartment Prior to removing the circuit breaker from the circuit breaker compartment make sure that the control circuits are deenergized CAUTION Prior to removing the circuit...

Страница 41: ...e open position and all springs are discharged CAUTION a Open the circuit breaker compartment door b Lift the secondary disconnect latch and remove the circuit breaker compartment s secondary disconnect plug Store the plug so it will not be damaged while withdrawing the circuit breaker Removal of the secondary disconnect plug will trip a closed breaker and discharge the main closing spring CAUTION...

Страница 42: ...nvironment Any time the circuit breaker is known to have interrupted a fault current at or near its rating it is recommended that the circuit breaker be inspected and the necessary maintenance be performed as soon as practical Some atmospheric conditions such as extremes of dust moisture or corrosive gases might indicate inspection and maintenance at more frequent intervals Very clean and dry cond...

Страница 43: ...place loose or missing hardware Any damaged parts that will interfere with the normal operation of the circuit breaker should be replaced This inspection will be much easier if the front cover and interphase barriers are removed Clean the circuit breaker by removing any loose dust and dirt Do not use compressed air to clean the circuit breaker This may result in loose dirt or grit being blown into...

Страница 44: ...rther details see Ch 4 Installation D Placing the Circuit Breaker Into Service 4 Mechanical Operation Check 6 Racking Mechanism Check 2 Lubrication Before applying any type of lubrication to the circuit breaker the stored energy mechanism should be in the OPEN position and all springs discharged CAUTION Powell offers a complete lubrication kit Powlube 104 which contains all the lubricants required...

Страница 45: ...ge Pin Figure 15 m C Oil Apply to penetrate where pin passes through end link Racking Drive Shaft Extension Figure 15 n Wipe clean Extend and apply A Grease to the exposed surface Main Closing Spring Guide Rod Figure 16 o C Oil Racking Mechanism Figure 16 p C Oil A Grease Apply C Oil to the crank arm rollers and racking crank arms Wipe clean Apply A Grease to worn gear Primary Trip Prop Figure 16 ...

Страница 46: ... b a Spring Yoke Pin b Primary Disconnecting Device c Trip Shaft Bearing d Jackshaft Support e Pawl Support Arm f Crank Pin g Motor Drive Shaft Roller Needle Bearings i Close Latch Shaft Face h Pawls n Racking Drive Shaft Extension m Fundamental Linkage Pin l Jackshaft Lever Pin k Secondary Disconnect Receptacle j Ratchet Wheel ...

Страница 47: ... Trip Prop r Open Closed Flag Drive Lever Pin at Jackshaft s Flag Support Pin t Jackshaft Outer Bearings Support u Ground Connection w Wheel v Motor Drive Shaft Coupling ab Fundamental Linkage aa Motor Cutoff Cam z Close Shaft Support Bearing y Camshaft Needle Bearings x Motor Drive Shaft Support Bearings o y aa ab u x t w r s v q p z ...

Страница 48: ...er and lock washer 2 Remove the horizontal bracket at the top of the main closing spring by unfastening the two attachment screws 3 Remove the spacer from above the bracket 4 Turn the bracket 90 and replace it on the top of the spring yoke 5 Place the spacer below the bracket with the flat washer below it 6 Insert screw and tighten until the tension is taken off the connecting rods 7 With a slight...

Страница 49: ...ing spring assembly reverse the preceding removal procedure Note Even though the mechanism was slow closed when it is opened it will operate at full speed keep all fingers and toes out of the way etc 5 Mechanism Adjustments Several factory adjustments in the stored energy mechanism are described below NO ADJUSTMENT OF THESE SETTINGS IS REQUIRED FOR ROUTINE MAINTENANCE but they may need to be adjus...

Страница 50: ... e Rivet f Trip Bar Sight Line b c d e f 0 005 0 015 a Perform the following procedures to adjust the primary trip prop 1 Remove the main closing spring Refer to Ch 5 Maintenance B Mechanism Area 3 Closing Spring Removal 2 Adjust the primary trip prop adjusting screw Figure 19 d so that with the fundamental linkage in the reset position the clearance between the primary trip prop roller and the se...

Страница 51: ...sing the manual charge handle per Ch 4 Installation D Placing the Circuit Breaker Into Service 4 Mechanical Operation Check 9 Manually CLOSE the circuit breaker 10 Using leaf type feeler gauges with a total of 0 090 thickness selected position the feeler gauge Figure 20 Figure 20 Feeler Gauge 11 Slowly depress the trip coil armature using the manual charge handle Depress the handle until the armat...

Страница 52: ...rip coil armature gap and does trip with 0 030 gauge inserted into the trip coil armature gap 16 Perform the latch check switch adjustment per the procedure found in Ch 5 Maintenance B Mechanism Area 4 Mechanism Adjustments d Latch Check Switch Adjustment 17 Replace circuit breaker front cover d Latch Check Switch Adjustment Figure 21 Latch Check Switch Adjustment Pivot Screw 0 045 c b a a Latch C...

Страница 53: ...SCHARGED 8 Reinstall the circuit breaker main closing spring e Adjustment of Close Latch Shaft The close latch shaft Figure 2 u passes through the side sheets of the stored energy mechanism frame at the front of and below the cam shaft The left end of the shaft is shaped to make a latch face and interferes with the close latch arm Figure 2 s which is fixed to the cam shaft The other end of the clo...

Страница 54: ...e from the bottom of the lower Current Transfer Block to the top of the Operating Pin Refer to Figures 22 and 23 Record the value measured Figure 22 Measurement of Open Position a b c a Open Position Gap b Bottom of Current Transfer Block c Top of Operating Pin Measure the distance between the bottom of the lower Current Transfer Block and the top of the Operating Pin Figure 23 Measurement of Clos...

Страница 55: ...ation on vacuum integrity and testing of vacuum interrupters 4 MechanicalAdjustmentofVacuumInterrupters There are no adjustments required for routine maintenance of a vacuum interrupter assembly There are several factory adjustments which will vary over the operating life of the vacuum interrupter Adjustments of these settings are only necessary when repair requires the removal or replacement of t...

Страница 56: ...f any part of the primary current path To check the primary resistance pass a minimum of 100A DC through the circuit breaker pole with the circuit breaker closed Measure the voltage drop across the primary contacts and calculate the resistance The resistance should not exceed the values provided in this instruction bulletin for the specific type and rating of the circuit breaker being measured Whe...

Страница 57: ...of any worn broken or damaged part A sufficient amount of stocked parts minimizes service interruptions caused by breakdowns and saves time and expense When continuous operation is a primary consideration a larger quantity of renewal parts should be stocked depending on the severity of the service and the time required to secure replacement parts Since parts may be improved periodically renewal pa...

Страница 58: ...further assistance at 1 800 480 7273 NOTICE 2 Closing Coil Assembly Refer to service manual 01 4SM 1300 Closing Coil Assembly for replacement and installation procedures 3 Primary Shunt Trip Coil Assembly Refer to service manual 01 4SM 1600 Primary Shunt Trip Coil Assembly for replacement and installation procedures 4 Secondary Shunt Trip Coil Assembly Refer to service manual 01 4SM 1700 Secondary...

Страница 59: ...mary Disconnecting Device Assembly Operating Pushrod Assembly 05PV36SNDX 4 76 1200 77014G01P 77018G01P 77017G01P 05PV36SNDX 4 76 2000 77014G01P 77018G01P 77017G01P 05PV50SNDX 4 76 1200 77014G03P 77018G01P 77017G02P 05PV50SNDX 4 76 2000 77014G03P 77018G01P 77017G02P Figure 24 Primary Current Path a c b a Primary Disconnecting Device Assembly b Vacuum Interrupter Assembly c Operating Pushrod Assembl...

Страница 60: ...er if the circuit breaker was originally equipped with this item All circuit breakers have a closing coil primary shunt trip coil charging motor and an anti pump relay assembly Secondary shunt trip coils and undervoltage device assemblies are optional see notes 2 7 2 Primary shunt trip coil is available as a 3 cycle and 5 cycle control device A circuit breaker with an original 5 cycle trip coil ma...

Страница 61: ...s and Replacement Procedures 01 4IB 77000B Figure 25 Control Devices a b c d e f a Primary Shunt Trip Coil 3 cycle b Primary Shunt Trip Coil 5 cycle c Charging Motor Assembly d Closing Coil Assembly e Anti Pump Relay f Undervoltage Device Assembly ...

Страница 62: ...s Parts Description Catalog Number Illustration Auxiliary Switch Push on Terminals Screw Terminals 102108LN 102108LP Ground Connection 69433G01 Latch Check Switch BA 2RV2 A2 Motor Cutoff Switch Assembly 77034G01P PowlVac ND Hardware Kit 60500G24 PowlVac ND Lubrication Powlube 104 Operating Pushrod Assembly 5kV 36kA 77017G01 5kV 50kA 77017G02 ...

Страница 63: ...uly 2015 Powered by Safety Powell Electrical Systems Inc Service Division Houston PO Box 12818 Houston TX 77217 Tel 713 944 6900 Fax 713 948 4569 powellind com info powellind com 2006 Powell Industries Inc All rights reserved 5kV 1200A 2000A 36kA 50kA ...

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