01.4SM.1400 Latch Check Switch Assembly & Tripping System
Contents
1. PA POWELL SM 1400 Latch Check Switch Assembly amp Tripping System Mechanism Adjustment Powered by Safety PA p OW F LL Latch Check Switch Assembly amp SM 1400 Tripping System Mechanism Adjustment Contact Information Powell Electrical Systems Inc www powellind com info powellind com Service Division PO Box 12818 Houston Texas 77217 2818 Tel 713 944 6900 Fax 713 948 4569 Powered by Safety SM 1400 W POWELL Signal Words Qualified Person As stated in ANSI Z535 4 2002 4 13 4 13 3 the signal word is a word that calls attention to the safety sign and designates a degree or level of hazard seriousness The signal words for product Safety signs are Danger Warning and Caution These words are defined as For the purposes of this manual a qualified person as stated in NFPA 70 is one familiar with the construction and operation of the equipment and the hazards involved In addition to the above qualifications one must also be uN DANGER 1 DANGER indicates an imminently hazardous situation which if not avoided will result in death or serious injury trained and authorized to energize deenergize clear ground and tag circuits and equipment in accordance with established safety practices 2 trained in the proper care and use of personal protective equipment PPE such as rubber gloves hard hat safety glasses or face shields flash c2. Remove front cover of the circuit breaker mechanism or part of the tripping system 2 Remove the main closing spring according adjustment to the circuit breaker original instruction bulletin Figure2 Latch Check Switch Adjustment 3 Remove the two screws that secure the latch check switch to the mechanism Do b lt 0 ia not lose the nut plate into which these screws are threaded 4 Disconnect the wires from the switch being careful to note which wire goes to which terminal IDAN ira H 5 Reconnect the wires to the new switch and fasten the switch in place with the screws and the nut plate which was previously removed PINOT CIEN 9 6 Adjust the switch To adjust the switch lade hek nich refer to steps in the following section Ch 4 Installation A Latch CHECK SwitcH REPLACEMENT AND ADJUSTMENT 2 Latch Check Switch Adjustment Latch Check Operator Secondary Trip Prop Adjusting Screw Secondary Trip Prop Adjusting Screw Nut anpe installation Powered by Safety 7 W POWELL Latch Check Switch Assembly amp Tripping System Mechanism Adjustment SM 1400 2 Latch Check Switch Adjustment Ensure that the control circuits are deenergized and the circuit breaker is deenergized disconnected by means of a visible break and securely grounded Perform the following steps for latch check switch adjustment 1 Remove the main closing spring according to the circuit breaker instruction bul
3. Figure 8 c f Reinstall the trip armature actuator assembly to the push to trip support bracket Note Dimensions can only be measured a when the actuator assembly is installed b C g Hold the trip armature actuator and d tighten the 46 hex nut h Replace the x washer and flat washer that was removed in step c a 10 32 Pan Head Kep Nut Trip Armature Actuator Figure7 Trip Armature Assembly Right View c 0 040 Air Gap Between the Trip Armature Actuator amp the Latch Check Operator d Latch Check Operator the 10 32 pan head cap screw Figure 7 e and nut Rotate the eccentric Figure 7 d to obtain the 0 040 inch gap and tighten the hardware b Hold the trip armature actuator assembly Figure 7 b and loosen the 6 hex nut Figure 7 a c Remove the x washer Figure 7 c and flat washer from the push to trip support bracket rivet d Remove the trip armature actuator assembly from the push to trip support bracket and let it suspend from the top of the circuit breaker a r 19 If there is an air gap of 0 040 inches 7 b Figure 6 c between the trip armature actuator and the latch check operator Figure 6 d of 0 040 inches then proceed c l to step 21 d a Ifthere is no air gap loosen E oa e 6 18 Hex Nut Trip Armature Actuator Assembly X Washer Eccentric 10 32 Pan Head Cap Screw eaAnSsa Installation Powered by Safety 13 y POWELL Latch Che
4. a circuit breaker with the main closing spring charged B LATCH CHECK SwitcH ASSEMBLY The latch check switch Figure 1 is located on the left side of the main mechanism frame near the bottom of the main closing spring The latch check switch assembly consists of the following e Latch Check Switch e Bracket Assembly Use existing hardware to replace latch check switch e 6 32 x 1 Screws 2 e Limit Switch Plate Tools required e Leaf Type feeler gauges e Allen Wrench Set e 1 2 Open End Wrench e Channel or Needle Nose Pliers e Screwdrivers Figure 1 Latch Check Switch Assembly 6 Powered by Safety Equipment Description _ PA POWELL SM 1400 w Ch 4 Installation 1 Latch Check Switch Replacement A LatcH CHECK SwitcH REPLACEMENT AND ADJUSTMENT A CAUTION To replace and adjust the latch check switch F haven di the main closing spring must be removed MOELAN SONTO ERa are Refer to the appropriate instruction bulletin for the specific circuit breaker for this procedure under Ch 5 Maintenance B MecHanism AREA deenergized and the circuit breaker is deenergized disconnected by means of a visible break and securely grounded The latch check switch adjustment is not Perform the following steps to replace the latch required for routine maintenance however check switch assembly the latch check switch may need to be adjusted after major overhaul removal of the 1
5. adjusting screw A IMPORTANT The gap should always be initially set to 0 045 The 0 045 to 0 015 reference is the allowable working gap tolerance measured during breaker operation Installation 8 Powered by Safety N POWELL sM 1400 Figure4 Latch Check Switch Mechanism INSERT GAGE HERE IMPORTANT Contacts should click when Trip Coil gap is initially adjusted to 0 045 2D Armature Note After this gap is initially set to 0 045 the Set to 0 045 7 allowable working gap Z 4 tolerance measured 4 l 2 during breaker operation should be between 0 045 and 0 015 Slotted Adjustment Screw L Latch Check Switch ja j a c l KO Trip Lever la Operator Trip Secondary Trip Prop Adjustment Screw and Jam Latch Check Operator Coil Strike Nut Arm Secondary Trip Stop Tab Installation Powered by Saf ety 9 W POWELL Latch Check Switch Assembly amp SM 1400 Tripping System Mechanism Adjustment 6 fa Depress the manual close operator and rotate the crank arm until resistance is felt Depress and hold the manual trip operator inward and rotate the crank arms until the spring charge indicator displays CLOSING SPRING DISCHARGED Reinstall the circuit breaker main closing spring assembly Operate the circuit breaker electrically several times to ensure the switch functions properly Note The latch check s
6. in the following circuit breakers e PowlVac STD PowlVac CDR e PowlVac ASD e PowlVac Replacement Circuit Breakers e PowlVac 38kV CDR PowlVac ND PURPOSE The information in this maintenance procedure is intended to provide information required to properly replace and adjust the latch check switch described in Ch 1 General Information A Score and adjust the tripping system mechanism This instruction bulletin provides 1 Safety guidelines 2 Instructions for latch check switch replacement and adjustment and tripping system mechanism adjustment 3 Procedure for critical adjustments 4 Illustrations photographs and description of the latch check switch assembly and adjustment and tripping system mechanism adjustment Latch Check Switch Assembly amp SM 1400 Tripping System Mechanism Adjustment The illustrations in this document are provided as general information to aid in showing component locations only All photos and illustrations are shown using deenergized equipment VAN WARNING Be sure to follow the appropriate safety precaution while handling any of the equipment Failure to do so may result in serious injury or death 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 local codes and ordinances which may vary greatly Power ed by S a fety General Informat
7. 0 gauge inserted into the trip coil armature gap Powered by Safety Latch Check Switch Assembly amp Tripping System Mechanism Adjustment SM 1400 A WARNING When any maintenance procedure requires the opening or closing of the circuit breaker or the charging of any of the stored energy mechanism springs exercise extreme caution to make sure that all personnel tools and other miscellaneous objects are kept well clear of the moving parts or the charged springs Failure to do this may cause serious damage or injury to the circuit breaker or personnel If tripping system adjustment is being made on 5kV or 15kV circuit breaker manually CLOSE and TRIP the circuit breaker so that all springs are discharged then proceed to Ch 4 Installation A LatcH CHEcK SwitcH REPLACEMENT AND ADJUSTMENT 2 Latch Check Switch Adjustment If tripping system adjustment is being made on 27kV or 38kV circuit breaker then proceed to step 18 18 Manually charge the main closing spring using the manual charge handle Refer to the appropriate circuit breaker instruction bulletin Ch 4 Installation D PLACING THE CircuiT BREAKER INTO SERVICE 4 Mechanical Operation Check Installation WJ POWELL sm 1400 Figure6 Trip Armature Assembly Left View e Rotate the trip armature actuator to achieve the desired height of 1 676 0 0 06 Figure 8 b from the top of the trip roller Figure 8 a to the top of the circuit breaker frame
8. F LL Latch Check Switch Assembly amp SM 1400 Tripping System Mechanism Adjustment This page is intentionally left blank i Powered by Safety W POWELL sm 1400 Ch1 General Information VAN WARNING The equipment described in this document may contain high voltages and currents which can cause serious injury or death The equipment is designed for use installation and maintenance by knowledgeable users of such equipment having experience and training in the field of high voltage electricity This document and all other documentation shall be fully read understood and all warnings and cautions shall be abided by If there are any discrepancies or questions the user shall contact Powell immediately at 1 800 480 7273 VAN WARNING Before any adjustment servicing part replacement 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 result in injury or death VAN IMPORTANT Powell reserves the right to discontinue and to change specifications at any time without incurring any obligation to incorporate new features in products previously sold General Information Power ed by S a fety 1 W POWELL A Scope The information in this service manual describes the following Latch Check Switch Latch Check Switch e BA 2RV2 A2 This device can be used
9. a small crescent wrench Repeat steps 10 through 13 until the breaker stays CLOSED with a 0 90 trip coil armature gap setting Installation Powered by Safety 11 W POWELL Note Bend the trip lever downward in very small increments This process may take several attempts ii If the circuit breaker did NOT TRIP during the test performed in step 13 reset the feeler gauges with 0 030 selected and position the feeler gauge Slowly depress the trip coil armature using the manual charge handle Depress the handle until the armature contacts the feeler gauges The circuit breaker should trip Note t is important to avoid tilting the trip coilarmature Tilting the armature by applying a load to the right of the feeler gauges will produce incorrect results If the circuit breaker did NOT TRIP during the test performed in step 15 remove the feeler gauges and trip the breaker Decrease the gap between the trip coil armature and the trip lever by bending the trip lever upwards slightly using channel lock pliers or a small crescent wrench Repeat steps 10 11 amp 15 and adjust until breaker trips with a 0 030 trip coil armature gap setting Note Bend the trip lever upward in very small increments This process may take several attempts Repeat steps 10 through 16 until the breaker does NOT TRIP with the 0 090 gauge inserted in the trip coil armature gap and DOES TRIP with the 0 03
10. ck Switch Assembly amp Tripping System Mechanism Adjustment SM 1400 Figure 8 Circuit Breaker Trip Roller a Circuit Breaker Trip Roller b C 20 21 22 1 676 0 06 Desired Trip Roller Height Top of Circuit Breaker Frame Manually CLOSE and TRIP the circuit breaker so that all springs are discharged Perform the latch check switch adjustment described in section Ch 4 Installation A LatcH CHECK SwitcH REPLACEMENT AND ApbJusTMENT 2 Latch Check Switch Adjustment Note The trip coil armature adjustment is now complete Remove the secondary disconnect override device Refer to step 22a or 22b depending on the circuit breaker type a Standard STD PowlVac Breaker e Depress and hold the trip button e Pull the racking access cover downward to expose the racking drive shaft e Insert the racking handle and rotate counterclockwise until a positive stop is felt There should be very little resistance to the turning effort until the end of travel position is reached The positive stop position should be easily detectable Do not apply excessive force to the racking handle e Remove the secondary disconnect override device Note The breaker position indicator will change positions but since the front cover has been removed it will not accurately indicate the disconnected position b Closed Door Racking CDR PowlVac Breaker e Manually rotate the racking input shaft co
11. eaker shall be in the disconnected position or shall be withdrawn completely ALL COMPONENTS SHALL BE DISCONNECTED BY MEANS OF A VISIBLE BREAK AND SECURELY GROUNDED FOR SAFETY OF PERSONNEL PERFORMING MAINTENANCE OPERATIONS ON THE CIRCUIT BREAKERS Interlocks are provided to ensure the proper operating sequences of the circuit breakers and for the safety of the user If for any reason an interlock does not function as described do not make any adjustments modification or deform the parts DO NOT FORCE THE PARTS INTO POSITION CONTACT POWELL FOR INSTRUCTIONS Powered by Safety Safety SM 1400 W POWELL E X Rays F SAFETY LABELS When high voltage is applied across the contacts of a vacuum interrupter there is the possibility of generation of X rays The intensity of the X radiation is dependent on the peak The equipment described in this document has DANGER WARNING CAUTION and instruction labels attached to various locations All equipment DANGER WARNING CAUTION voltage and the contact gap At the normal operating voltage for this type of equipment the radiation levels are negligible At the and instruction labels shall be observed when the circuit breaker is handled operated or maintained voltages specified for testing test personnel shall be in front of the circuit breaker such that the two layers of steel used in the frame and front cover construction are between the test personnel a
12. ety program for each type of disconnected position equipment encountered 4 Apply lockout tagout devices in accordance It is mandatory that the following rules be with a documented and established policy observed to ensure the safety of personnel associated with usage installation operation 5 Use an adequately rated voltage detector and maintenance of these circuit breakers to test each phase conductor or circuit part to verify they are deenergized Test each The safety rules in this instruction bulletin are phase conductor or circuit part both not intended to be a complete safety program phase to phase and phase to ground The rules are intended to cover only some of the Before and after each test determine important aspects of personnel safety related to that the voltage detector is operating latch check switch replacement and adjustment satisfactorily and tripping system mechanism adjustment Safety Powered by Safety 3 W POWELL Latch Check Switch Assembly amp Tripping System Mechanism Adjustment SM 1400 C GENERAL i Only supervised and qualified personnel trained in the usage installation operation and maintenance of the circuit breaker shall be allowed to work on this equipment It is mandatory that this instruction bulletin any supplements and service advisories be studied understood and followed Maintenance programs must be consistent with both customer experience and manufacturer s recommendat
13. he breaker position indicator will change positions but since the front cover has been removed it will not accurately indicate the connected position Note Steps 3a and 3b ensure that the secondary disconnect override device is mechanically held in the secondary disconnect receptacle during opening and closing of the circuit breaker This maintenance procedure requires charging the stored energy spring and subsequently closing and opening the circuit breaker Exercise extreme caution to make sure that all personnel tools and other objects are clear of the moving parts or the charged springs Failure to do this may cause serious damage or injury to the circuit breaker and personnel Powered by Safety Installation W POWELL SM 1400 4 Loosen the secondary trip prop adjusting screw locking nut Figure 2 d several full turns DO NOT allow the secondary trip prop adjusting screw to turn while loosening the locking nut Failure to observe this will severely damage the mechanism 11 12 Manually charge the circuit breaker main spring Manually CLOSE the circuit breaker Slowly turn the secondary trip prop adjusting screw Figure 2 c clockwise in 1 s turns 45 increments until the breaker trips OPEN Carefully note the rotational position of the tool used to turn the adjusting screw at the moment the breaker opens Do NOT turn the screw any further clockwise after the breaker ope
14. ion PA POWELL SM 1400 w Ch2 Safety 6 Where the possibility of induced voltages or stored electrical energy exists ground A Sare Work ConDITION the phase conductors or circuit parts before touching them Where it could be The information in Section A is quoted from reasonably anticipated that the conductors NFPA 70E 2004 Article 120 120 1 Establishing an or circuit parts being deenergized Electrically Safe Work Condition could contact other exposed energized conductors or circuit parts apply ground 120 1 Process of Achieving an Electrically Safe connecting devices rated for the available Work Condition fault duty 1 Determine all possible sources of electrical B Sarety GUIDELINES supply to the specific equipment Check applicable up to date drawings diagrams Study this maintenance procedure and all other and identification tags associated documentation before installing the latch check switch and performing 2 After properly interrupting the load current adjustments OPEN the disconnecting device s for each source Each user has the responsibility to instruct and supervise all personnel associated with 3 Wherever possible visually verify that all usage installation operation and maintenance blades of the disconnecting devices are of this equipment on all safety procedures fully OPEN or that drawout type circuit Furthermore each user has the responsibility of breakers are withdrawn to the fully establishing a saf
15. ion cccicccesccesesccesecsseeucesesedeescxessoeeucesesseedecsiesadesscessssessscesseedssassnesdeeseseenseeshesess002 7 A LATCH CHECK SWITCH REPLACEMENT AND ADJUSTMENT cccccccccccccsccccccccsccccccccccccccccccccccccccsccccccccccccccccccceccccccccccccceccccoss 7 U Lach CHECK SWIC COI ACCC osioihin eni A ae iin ONA EEEE eE na a aden 7 2 Lah CCC SWIC Adjustment seereis teree neei enni E EEE eNEAN EEr EEEE ONET EEAS EE EEEE NEEE EENE EES 8 B TRIPPING SYSTEM DJUSTMENT ssssoosssssssooossssecocoossssecocosssscccocosssscecoosssssesooosssseceoossssesocossssscsocosssseseoossssssesossssssese 10 Figures Figure1 Latch Check Switch Assembly sssseecosssooooossooooosccooooscooossscoosossooosssceossoseesssoo 6 Figure 2 Latch Check Switch Adjustment esseesscccccceccceccccecccecccceccoccocccecccecccceccceocseeoo 7 Figure3 Rotating Latch Check Switch Upwards ccccsscccssscccssssccssssccsssscccssscossssces 8 Figure4 Latch Check Switch Mechanism sssecsseccscocccccccccccccecccccccceccceocceeccceoccscecocseeose 9 Foues Feer GOUJO seinra eerren Eae ESEE EENE ETEA Nia 11 Figure6 Trip Armature Assembly Left View ssssseocossssccoooosssccosoosescoososossecososssseoosoo 13 Figure7 Trip Armature Assembly Right View ssssseooossooooooscesoosscoooossooososeeossoseesoo 13 Figure8 Circuit Breaker Trip Roller ssccssecccsecoccccccccococeccccoccccoccecccececocococcocccoccceosceeoo 14 Powered by Safety PA p OW
16. ions including service advisories and instruction bulletin s A well planned and executed routine maintenance program is essential for circuit breaker s reliability and safety Service conditions and circuit breaker applications shall also be considered in the development of safety programs Variables include ambient temperature humidity actual continuous current thermal cycling number of operations interrupting duty and any adverse local conditions including excessive dust ash corrosive atmosphere vermin and insect infestations D SPECIFIC P DO NOT WORK ON AN ENERGIZED CIRCUIT BREAKER If work must be performed on a circuit breaker remove it from service and remove it from the metal clad switchgear DO NOT WORK ON A CIRCUIT BREAKER WITH THE CONTROL CIRCUIT ENERGIZED 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 personnel capable of releasing each spring load in a controlled manner Detailed information regarding these mechanisms is found in this instruction bulletin DO NOT ATTEMPT TO CLOSE THE CIRCUIT BREAKER MANUALLY ON AN ENERGIZED CIRCUIT DO NOT USE AN OPEN CIRCUIT BREAKER AS THE SOLE MEANS OF ISOLATING A HIGH VOLTAGE CIRCUIT For complete isolation the circuit br
17. letin Rotate the crank arms until the spring charge indicator displays CLOSING SPRING CHARGED Loosen the two screws securing the latch check switch and rotate the rear of the latch check switch downward to the end of its travel The latch check switch contacts are now OPEN Insert a 0 045 gauge Figure 3 a between the secondary trip prop adjusting screw Figure 3 b and latch check operator Figure 3 c Rotate the latch check switch upwards until the contacts close An audible click of the contact s closing will be heard At the position where the contacts close hold the switch and retighten the two screws securing the latch check switch Remove the gauge Figure 3 ANA Rotating Latch Check Switch Upwards 0 045 Feeler Gauge Secondary Trip Prop Adjusting Screw Latch Check Switch Arm Latch Check Operator To confirm that the latch check switch is properly set slowly depress and release the manual trip operator to verify that the latch check switch OPENS and CLOSES properly An audible click of the contacts will be heard The latch check switch contacts will OPEN as the latch check operator is moved by the manual trip operator away from the secondary trip adjusting screw Slowly withdraw the manual trip operator and the latch check switch contacts should close when the latch check operator s secondary trip stop tab is between 0 045 to 0 015 away from the rear edge of the secondary trip prop
18. lothing etc VAN WARNING WARNING indicates a potentially hazardous situation which if not avoided could result in in accordance with established safety practices trained in rendering first aid if necessary death or serious injury CAUTION indicates a potentially hazardous situation which if not avoided may result in minor or moderate injury Not stated in ANSI Z535 4 2002 4 13 4 13 3 as a signal word but used in this manual is IMPORTANT This is defined as A IMPORTANT IMPORTANT indicates a section of the manual covering a non hazardous situation but one where Powell feels proper attention is warranted Powered by Safety W POWELL sM 1400 Contents CHT Generalinformation osossseososososoooososososooeososososoososssosossosssososossososososossosssossssso 1 Fis SCORE e E AE E E E E A A 2 D PUROS E esera E EEEE EEE EEE E EE 2 BiP a EET E E E E AE A E 3 Ae SARE VV ORK ONDIMION senro assanar E E AE E E 3 D SAE CID EINES iE E EE EE EE 3 C ENEA a E E O E A 4 D P E aaea O E AERE EE E EEE 4 Ee ARO E E E E E E EE 5 E SAY LADE aa E EE A E EE 5 Ch 3 Equipment Description seesscccccccccccccccccccceccccccccccccccecccceccecccecccecccecccecccecccecceecceecceeo 6 P GGENERAL eee EE E E E E ENE 6 B LATCH CHECK SWITCH ASSEMBLY eeeeossssseoeoossssscoooosssescoososssccosossssscecoossssescososssesoecossssccoooossssccosossssecsososssssseoossssseseoss 6 CH4 Installat
19. nd 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 man IMPORTANT Warning and Caution labels are located in various places in and on the switchgear and on the circuit breaker removable element Always observe these warnings and caution labels Do NOT remove or deface any of these warning caution labels Safety Powered by Safety 5 W POWELL Latch Check Switch Assembly amp SM 1400 Tripping System Mechanism Adjustment Ch3 Equipment Description A GENERAL This maintenance procedure is divided into two sections the first section covers the replacement and adjustment procedures for the latch check switch Ch 4 Installation A LATCH CHECK SwitcH REPLACEMENT AND ADJUSTMENT and the second section covers the adjustment of the PowlVac circuit breaker tripping system adjustment Ch 4 Installation B TRIPPING SYSTEM ADJUSTMENT VAN IMPORTANT Always ensure correct adjustment of the tripping system mechanism components prior to performing the latch check switch adjustments Ensure that the control circuits are deenergized and the circuit breaker is deenergized disconnected by means of a visible break and securely grounded Do NOT start to work on a closed circuit breaker or
20. rates Turn the secondary trip prop adjusting screw Figure 2 c counterclockwise 11 2 full turns from the position noted in step 7 While preventing the secondary trip prop adjusting screw from turning securely tighten the secondary trip prop adjusting screw locking nut Figure 2 d Note The secondary trip prop screw adjustment is now complete To begin adjustment of the trip coil armature gap manually charge the main closing spring using the manual charge handle Manually CLOSE the circuit breaker Using leaf type feeler gauges with a total of 0 090 thickness selected position the feeler gauge below the trip coil armature as shown in Figure 5 Figure 5 Feeler Gauge a Trip Coil Armature b Feeler Gauge 13 Slowly depress the trip coil armature using the manual charge handle Position the handle as shown in Figure 5 Depress the handle until the armature contacts the feeler gauges The circuit breaker should not trip Note Itis important to avoid tilting the trip coil armature Tilting the armature by applying a load to the right of the feeler gauges will produce incorrect results 14 Choose one of the following steps according to the results of the TRIP status from step 13 i Ifthe circuit breaker TRIPPED during the test performed in step 13 increase the gap between the trip coil armature and the trip lever by bending the lever downwards slightly using channel lock pliers or
21. unterclockwise until a positive stoop is felt There should be very little resistance to the turning effort until the end of travel position is reached The positive stop position should be easily detectable e Remove the secondary disconnect override device Note The breaker position indicator will change positions but since the front cover has been removed it will not accurately indicate the disconnected position 23 Replace the circuit breaker front cover Powered by Safety Installation PA POWELL SM 1400 w This page is intentionally left blank Powered by Safety PA p OW F LL Latch Check Switch Assembly amp SM 1400 Tripping System Mechanism Adjustment This page is intentionally left blank Powered by Safety W POWELL SM 1400 Latch Check Switch Assembly amp Tripping System Mechanism Adjustment January 2009 a ee eT Powell Electrical Systems Inc Powered by Safety Tel 713 944 6900 Fax 713 948 4569 Service Division Houston www powellind com PO Box 12818 Houston TX 77217 2006 Powell Industries Inc All rights reserved info powellind com
22. witch replacement and adjustment are now complete B TRIPPING SYSTEM ADJUSTMENT To adjust the PowlVac Tripping System perform the following steps 1 Ensure the circuit breaker is in the OPEN position and all springs are DISCHARGED Remove the circuit breaker front cover Install a secondary disconnect override device to allow manual closing and opening of the breaker Refer to step 3a or 3b depending on the circuit breaker type a Standard STD PowlVac Breaker e Install secondary disconnect override device e Depress and hold the trip button e Pull the racking access cover downward to expose the racking drive shaft e Insert the racking handle and rotate clockwise until a positive stop is felt There should be very little resistance to the turning effort until the end of travel position is reached The positive stop position should be easily detectable Do not apply excessive force to the racking handle Note The breaker position indicator will change positions but since the front cover has been removed it will not accurately indicate the connected position b Closed Door Racking CDR PowlVac Breaker e Install secondary disconnect override device e Manually rotate the racking input shaft clockwise until a positive stop is felt There should be very little resistance to the turning effort until the end of travel position is reached The positive stop position should be easily detectable Note T
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