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Powell PowlVac 01.4IB.50032C Manual Download Page 59

Powered by Safety

®

52

Recommended Renewal Parts and Replacement Procedures

PowlVac® DHP 15kV Replacement Circuit Breaker 

01.4IB.50032C

10) Motor Cutoff Switch Assembly

Refer to 

SM-1500 Motor Cutoff Switch 

Assembly

 for replacement and installation 

procedures.

11) Auxiliary Switch

Refer to 

SM-1100 Auxiliary Switch 

Assembly

 for replacement and installation 

procedures.

Summary of Contents for PowlVac 01.4IB.50032C

Page 1: ...01 4IB 50032C PowlVac DHP 15kV Replacement Vacuum Circuit Breaker Replacement for Westinghouse Type DHP Air Magnetic Circuit Breaker Powered by Safety...

Page 2: ...DHP 15kV Replacement Circuit Breaker 01 4IB 50032C Contact Information Powell Electrical Systems Inc www powellind com info powellind com Service Division PO Box 12818 Houston Texas 77217 2818 Tel 713...

Page 3: ...t 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 purpose...

Page 4: ...h Actuator 21 E Rollout Truck 21 F Secondary Contacts 21 G Ground Contact 22 H Shutter Rollers 22 I Vacuum Interrupters 22 Ch 4 installation 23 A Receiving 23 B Handling 23 C Storage 23 D Placing the...

Page 5: ...6 Electrical Operation 43 C Vacuum Interrupter and Contact Area 43 1 Vacuum Interrupter and Contact Erosion 43 2 Sliding Contact Wear 44 3 Vacuum Integrity 44 4 Mechanical Adjustment of Vacuum Interru...

Page 6: ...equence 16 Figure 8 Typical Control Scemes 17 Figure 9 Racking Device and Interlock 19 Figure 10 Lubrication 37 Figure 11 Lubrication cont 38 Figure 12 Main Closing Spring Assembly Compressed for Remo...

Page 7: ...ement Circuit Breaker 01 4IB 50032C Tables Table A Field Dielectric Test Values 25 Table B Lubrication 36 Table C Timing 44 Table D Primary Resistance 45 Table E Primary Current Path 53 Table F Contro...

Page 8: ...nt or any other act is performed requiring physical contact with the electrical working components or wiring of this equipment the power supply must be disconnected Failure to follow this warning may...

Page 9: ...f each particular type of replacement circuit breaker The illustrations in this document are provided as general information to aid in showing component locations only All illustrations and photos are...

Page 10: ...asurement and test instruments intended for use on electrical systems 1000 V and below 6 Where the possibility of induced voltages or stored electrical energy exists ground the phase conductors or cir...

Page 11: ...e it from 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 OT...

Page 12: ...acuum 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 POTEN...

Page 13: ...nsidered the front of the circuit breaker The operating mechanisms of the circuit breaker are exposed by removing the front cover The stored energy mechanism assembly provides motion to each of the va...

Page 14: ...a Cover Bolt b Blank Panel c Handle d Escutcheon e Manual Trip Operator f Manual Charging Crank g Breaker Open Closed Indicator h Manual Close Operator i Operations Counter j Spring Charge Indicator k...

Page 15: ...rcuit Breaker 01 4IB 50032C Figure 2 PowlVac DHP Replacement Circuit Breaker Front Cover Removed a Anti Pump Relay b Opening Spring c Connecting Rod d Main Closing Spring e Shock Absorber Dashpot f Pr...

Page 16: ...Main Closing Cam i Secondary Trip Prop Adjusting Screw a b d e g i j k m o q s v l n p r t u x z w y f h c j Latch Check Switch k Jackshaft l Holding Pawl Support Arm m Crank Pin n Holding Pawl Adjust...

Page 17: ...rimary Riser e Vacuum Interrupter f Upper Primary Disconnect Device g Strut Kit h Standoff Insulator i Lower Primary Disconnect Device j Shutter Roller k Secondary Disconnect Plug l MOC Actuator m Gro...

Page 18: ...by the holding pawl adjusting eccentric Figure 3 n located to the left front of the mechanism When the mechanism is operated manually the top pawl becomes the drive pawl and the bottom pawl becomes t...

Page 19: ...wlVac DHP 15kV Replacement Circuit Breaker 01 4IB 50032C Figure 5 Cam and Fundamental Linkage Positions d Breaker Closed Spring Charged b Breaker Closed Spring Discharged a Breaker Open Spring Charged...

Page 20: ...j k a m a Secondary Trip 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...

Page 21: ...ng devices and engage an extension to the vacuum interrupter assembly thus moving the vacuum interrupter contact The bell cranks give an approximate 3 to 1 multiplication of the contact loading spring...

Page 22: ...hen the main closing spring is fully charged and the stored energy mechanism is ready for a closing operation It is located at the bottom right of the mechanism and is supported by a bracket which is...

Page 23: ...Makes LS Breaks LS Makes 52 b Breaks VCB Closed White Light Deenergized Motor M Energized Prevents Close Coil Energization Before Spring is Fully Charged Y Coil Energized Close Coil CC Deenergized 52...

Page 24: ...Y LS 13 R PR CS T TC 52 a 52 a 13 10 RES 57 52 b 58 53 52 b 54 52 b 14 FU 35A FU 20A Pull Apart Fuse Block LS Spring Charge Limit Switch Shown with Breaker Closing Springs Discharged M Bkr Closing Sp...

Page 25: ...is loosely retained in a housing fastened to the rear of the chassis The operation consists of engaging the rotatable racking shaft on the circuit breaker with the racking screw mounted on the rear wa...

Page 26: ...eaker cannot be moved from the test disconnected to the connected position unless the main circuit breaker contacts are opened and the circuit breaker cannot be removed from the connected to the test...

Page 27: ...cking shaft pin located where the racking handle is attached will break allowing the handle to turn free The strength of this pin has purposely been selected to protect inaccessible internal parts of...

Page 28: ...t breaker The wheels are not made to swivel so movement of the circuit breaker can be guided by steering the circuit breaker with the fifth wheel accessory which is furnished with the original switchg...

Page 29: ...e compartment H Shutter Rollers The shutter roller Figure 4 j is located on the right side of the circuit breaker frame The shutter roller function is to engage the shutter operating lever in the comp...

Page 30: ...e circuit breaker with an overhead crane use the two lifting points which have been provided for hooks at the top of the circuit breaker Figure 4 a C Storage Shipping and storage of electrical equipme...

Page 31: ...ials should be utilized Desiccant packets should be installed in all compartments and packing containers D Placing the Circuit Breaker into Service Before shipment from the factory all circuit breaker...

Page 32: ...eld Dielectric Test Values Rated Maximum Voltage kV rms Power Frequency Withstand kV rms 15 27 This test will have checked all of the primary phase to ground and phase to phase insulation CAUTION Afte...

Page 33: ...ecifically 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...

Page 34: ...arging motor must be disconnected prior to testing the control circuit The charging motor itself may be similarly tested at a voltage not to exceed 675V 50 or 60Hz Be sure to remove any test jumpers a...

Page 35: ...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 b...

Page 36: ...reaker into the circuit breaker compartment 1 Prior to Inserting the Circuit Breaker into the Circuit Breaker Compartment a Check the Primary Disconnecting Devices and Circuit Breaker Compartment Exam...

Page 37: ...on right hand side of the compartment floor c Remove handling dolly once circuit breaker is aligned with guide on compartment floor CAUTION Do not start the circuit breaker into the compartment with...

Page 38: ...ition the racking shaft pin located where the racking crank engages will shear and the racking operating shaft will rotate freely If the pin shears it is an indication that the circuit breaker should...

Page 39: ...and verify that the circuit breaker open closed indicator displays BREAKER OPEN b Insert the racking handle on the racking operating shaft and turn it counterclockwise until the racking crank rotates...

Page 40: ...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 conditi...

Page 41: ...e with a dry lint free cloth or an industrial type wiper to clean the circuit breaker Do not use solvents de greasers or any aerosol products to clean in the area of any mechanisms Refer to Ch 5 Maint...

Page 42: ...nderol A456 oil A grease should be lightly applied to those bearing surfaces that are accessible Inaccessible surfaces such as bearings may be lubricated with a light synthetic machine oil such as C o...

Page 43: ...ply a light coating of grease and remove all excess Ratchet Wheel Figure 10 l A Grease Jackshaft Lever Pins passing through Operating Pushrods Figure 10 k C Oil Avoid lubricating on operating pushrods...

Page 44: ...tch Shaft Face n Motor Drive Shaft Roller Needle Bearings e Fundamental Linkage Pin f Jackshaft Support l Ratchet Wheel j Pawls d Trip Shaft Bearing k Jackshaft Lever Pin c Primary Trip Prop Bearing a...

Page 45: ...in at Jackshaft w Flag Support Pin y Motor Drive Shaft Coupling v Fundamental Linkage ab Motor Cutoff Cam x Close Shaft Support Bearing z Camshaft Needle Bearings aa Motor Drive Shaft Support Bearings...

Page 46: ...see Ch 5 Maintenance B Mechanism Area 4 Slow Closing of Mechanism Figure 13 Main Closing Spring Assembly Installed a c e d b a Bracket b Bolt c Lock Washer d Flat Washer e Spacer The procedure for spr...

Page 47: ...tion b Push the manual close operator inward and hold it in while operating the charging handle to rotate the camshaft c When the close release latch arm has passed the close shaft latch plate the man...

Page 48: ...erial number information The serial number of the circuit breaker is also attached to the circuit breaker frame near the ground connection on an engraved serial metal plate The serial number found on...

Page 49: ...tch about the pivot screw downward to the lowest position allowed The latch switch contacts are now OPEN 4 Insert a 0 045 gauge between the secondary trip prop adjusting screw Figure 15 c and latch ch...

Page 50: ...e close bar adjusting screw 3 to 31 2 full turns counterclockwise Retighten the locking nut holding the screw 7 Repeat step 5 Then CLOSE and OPEN the circuit breaker to ensure proper operation 8 Repla...

Page 51: ...amage to the circuit breaker may result When it is necessary to remove or replace the vacuum interrupter it should only be done by a qualified technician or a Powell service technician Contact Powell...

Page 52: ...ed 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...

Page 53: ...ke note of the safety practices outlined in Ch 2 Safety of this instruction bulletin CAUTION Ensure that the control circuits are deenergized and the circuit breaker is deenergized disconnected by mea...

Page 54: ...o the operating pin Remove the X washer from one end of the vacuum interrupter operating pin and remove the pin Figure 17 The X washer can be opened by squeezing the two projecting tabs with pliers Di...

Page 55: ...vise or a similar clamping method while assembling the upper block to the vacuum interrupter Exercise care when clamping the upper block to prevent damage to the silver plated contact surfaces CAUTIO...

Page 56: ...her with pliers It may be necessary to align the operating yoke and bell crank holes to allow pin insertion This can be accomplished by applying a downward force to the lower contact block just suffic...

Page 57: ...ollowing a If present loosen the set screw in the operating yoke b Remove the X washer from one side of the pin c While applying a downward force to the moving contact block just sufficient to overcom...

Page 58: ...bly and replace it in the mounting clips Tighten the bolt holding the rear mounting clip If copper is visible at more than one contact location on a finger assembly that assembly should be replaced Ap...

Page 59: ...DHP 15kV Replacement Circuit Breaker 01 4IB 50032C 10 Motor Cutoff Switch Assembly Refer to SM 1500 Motor Cutoff Switch Assembly for replacement and installation procedures 11 Auxiliary Switch Refer...

Page 60: ...1 5UC 101 110 50934G28 60500G40 15PV25DHP3 15 2000A 50952G01 5UC 101 110 50934G28 60500G40 15PV36DHP3 15 1200A 50952G01 5UC 101 110 50934G26 60500G20 15PV36DHP3 15 2000A 50952G01 5UC 101 110 50934G26...

Page 61: ...4 50041G04 50042G05 n a n a n a n a Notes 1 One required per circuit breaker if the circuit breaker was originally equipped with this item All circuit breakers have a closing coil primary shunt trip c...

Page 62: ...and Replacement Procedures 01 4IB 50032C Figure 22 Control Devices 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 Re...

Page 63: ...inals 102108LP Latch Check Switch BA 2RV2 A2 Motor Cutoff Switch Assembly 50756G03 Image Not Available PowlVac Hardware Kit 60500G24 PowlVac Lubrication Kit Powlube 104 Operating Pushrod Assembly 25kA...

Page 64: ...818 Houston TX 77217 Tel 713 944 6900 Fax 713 948 4569 www powellind com info powellind com 2006 Powell Industries Inc All rights reserved Replacement for Westinghouse Type DHP Air Magnetic Circuit Br...

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