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Maintenance

01.4IB.65131

c. Tripping System Adjustment

Prior to adjustments, 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.

WARNING

To adjust the PowlVac 38™ ARM 3000A

Series 4 Vacuum Circuit Breaker Tripping

System perform the following steps:

1. Prior to performing this adjustment

procedure, all high voltage

components shall be deenergized,

disconnected by means of visible

break and securely grounded, and

ensure that the control circuits are

deenergized.

2. Remove the circuit breaker front

cover.

3. Loosen the secondary trip prop

adjusting screw locking nut several

full turns.

CAUTION

Do NOT allow the secondary trip prop

adjusting screw to turn while loosening the

locking nut. Failure to observe this caution

will severely damage the mechanism.

4. Manually charge the circuit breaker

main spring.

5. Manually CLOSE the circuit breaker.

6. Slowly turn the secondary trip prop

adjusting screw

(Figure 19, c)

clockwise in 1/8 turn (45˚)

increments until the breaker trips

OPENS. Carefully note the rotational

position of the too used to turn the

adjusting screw at the moment the

breaker operates. Do NOT turn the

screw any further clockwise after the

breaker operates.

7. Turn the secondary trip prop

adjusting screw counterclockwise

1½ full turns from the position

noted in

step 6

8. While holding the secondary trip

prop adjusting screw from turning,

securely tighten the secondary trip

prop adjusting screw locking nut.

9. Manually charge the main closing

spring using the manual charge

handle per

Ch 4 Installation,

D. Placing the Circuit Breaker Into

Service, 4) Mechanical Operation

Check.

10. Manually CLOSE the circuit breaker.

11. Using leaf type feeler gauges with

a total of 0.090” thickness selected,

position the feeler gauge as shown

Figure 18

Figure 18 Feeler Gauge

12. Slowly depress the trip coil armature

as shown in

Figure 18

. Depress the

handle until the armature contacts

the feeler gauges. The circuit

breaker should not trip.

Содержание 38PV40ARMM-4

Страница 1: ...Instruction Bulletin 01 4IB 65131 PowlVac 38 ARM 3000A Series 4 Vacuum Circuit Breaker 38kV 40kA 3000A Powered by Safety...

Страница 2: ...wlVac 38 ARM 3000A Series 4 Vacuum Circuit Breaker 01 4IB 65131 Contact Information Powell Electrical Systems Inc powellind com info powellind com Service Division 7232 Airport Blvd Houston Texas 7706...

Страница 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...

Страница 4: ...Powered by Safety PowlVac 38 ARM 3000A Series 4 Vacuum Circuit Breaker 01 4IB 65131 This page is intentionally left blank...

Страница 5: ...7 A General 7 B The Stored Energy Mechanism 7 1 Mechanical Description 7 2 Electrical Description 16 C Automatic Racking Mechanism 17 1 General Description 17 2 Racking Mechanism 21 D Circuit Breaker...

Страница 6: ...e Circuit Breaker to the Connected Position 34 F Removing the Circuit Breaker from the Circuit Breaker Compartment 35 1 Removing the Circuit Breaker from the Connected to the Test Disconnected Positio...

Страница 7: ...C Replacement Procedures 52 1 Vacuum Interrupter Assembly 53 2 Closing Coil Assembly 53 3 Primary Shunt Trip Coil Assembly 53 4 Secondary Shunt Trip Coil Assembly 53 5 Undervoltage Device Assembly UV...

Страница 8: ...nd Fundamental Linkage Positions 13 Figure 6 Mechanism and Trip Linkages 14 Figure 7 Operation Sequence 18 Figure 8 Typical Control Scheme 19 Figure 9 Circuit Breaker in Shipping Carton 24 Figure 10 C...

Страница 9: ...01 4IB 65131 Tables Table A Field Dielectric Test Values 26 Table B Lubrication 41 Table C Timing 51 Table D Primary Resistance 51 Table E Primary Current Path 54 Table F Control Devices 55 Table G Mi...

Страница 10: ...Powered by Safety vi PowlVac 38 ARM 3000A Series 4 Vacuum Circuit Breaker 01 4IB 65131 This page is intentionally left blank...

Страница 11: ...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 deat...

Страница 12: ...the PowlVac 38 ARM Series 4 vacuum circuit breaker The illustrations in this document are provided as general information to aid in showing component locations All illustrations and photos are shown...

Страница 13: ...source N Exception No 1 An adequately rated permanently mounted test device shall be permitted to be used to verify the absence of voltage of the conductors or circuit parts at the work location provi...

Страница 14: ...r Lines and Equipment is an example of a standard that contains information on capacity of temporary protective grounding equipment c Impedance Temporary protective grounding equipment and connections...

Страница 15: ...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...

Страница 16: ...ed in the frame and front 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...

Страница 17: ...rupter moving contact assemblies through operating pushrods Figure 4 s t In the same metal enclosed compartment as the stored energy mechanism is the circuit breaker racking mechanism and interlocks w...

Страница 18: ...reaker Position Indicator g Padlock Seal h Padlock Provision Movable Arm i Front Cover j Nameplate Figure 1 PowlVac 38 ARM 3000A Series 4 Vacuum Circuit Breaker Front View with Cover a b d e g h i f j...

Страница 19: ...ont View No Cover a Circuit Breaker Monitor Optional b Anti Pump Relay c Emergency Racking Drive Shaft d Racking Motor e Opening Spring f Main Closing Spring g Connecting Rod h Shock Absorber Dashpot...

Страница 20: ...djusting Eccentric g Crank Pin h Crank Arm i Ratchet Wheel j Pawl Lift Drive Plate k Close Latch Arm l Close Latch Shaft m Drive Pawl n Pawl Support Arm o Closing Coil p Camshaft q Motor Cutoff Cam r...

Страница 21: ...Disconnect Device g Anti Rollout Latch h Frame i Wheel j Serial Number Plate k Crank Arm Roller l Racking Crank Arm m Racking Shaft n Interlock Cam o Insulating Pole Support p Heat Sink q Clevis r Pus...

Страница 22: ...tch the ratchet wheel after each 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...

Страница 23: ...quipment Description 01 4IB 65131 Figure 5 Cam and Fundamental Linkage Positions a Breaker Open Spring Charged Links Reset b Breaker Closed Spring Discharged c Breaker Open Spring Discharged d Breaker...

Страница 24: ...ry 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 Operating Lever...

Страница 25: ...r of bell cranks for each phase are connected to a 5 8 diameter pivot pin supported by the base pan vertical support weldment Each bell crank is connected to an operating pin which passes through a ho...

Страница 26: ...lying the charging motor when the main closing spring is fully charged and the stored energy mechanism is ready for a closing operation It is located to the bottom right of the mechanism and is suppor...

Страница 27: ...st disconnect and the connected positions in the circuit breaker compartment The main racking mechanism components for the PowlVac 38 Automatic Racking Mechanism ARM Vacuum Circuit Breaker are shown a...

Страница 28: ...Spring Discharged LS Breaks LS 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 Energize...

Страница 29: ...GED DEVICE IDs Y ANTI PUMP RELAY TC BREAKERTRIP COIL CC BREAKER CLOSE COIL M CHARGING MOTOR 52 a BREAKER AUXILIARY CONTACT NORMALLY OPEN 52 b BREAKER AUXILIARY CONTACT NORMALLY CLOSED SD BREAKER SECON...

Страница 30: ...cam striker arm attached to the racking drive shaft Upon initial insertion of the circuit breaker into the compartment a position interlock prevents moving the circuit breaker from the disconnected p...

Страница 31: ...end of the racking shaft inside the circuit breaker frame In addition the racking crank arms have rollers attached to each end of the racking shaft which engage the vertical slots of the racking cams...

Страница 32: ...as the circuit breaker travels to the connected position 5 Ground Connection The ground connection Figure 4 ab is an assembly of spring loaded fingers that grounds the circuit breaker frame as it is...

Страница 33: ...opper vacuum interrupter blocks The multi contact bands inside the upper vacuum interrupter block make contact with this block and the upper stem of the vacuum interrupter The upper primary disconnect...

Страница 34: ...uit breaker it is recommended that it should be pushed and steered by using the optional fifth wheel assembly The fifth wheel assembly allows for easy maneuverability of the circuit breaker when handl...

Страница 35: ...to leave all doors and panels accessible for inspection The equipment must be inspected on a routine basis to assure operational integrity 2 Equipment designed for outdoor exposure may be stored eithe...

Страница 36: ...k period to the next To check insulation integrity the AC high potential test described below is strongly recommended DC testing is not the preferred method however values are provided due to the avai...

Страница 37: ...may increase with increased voltage and or decreased contact spacing X radiation produced during this test with the voltage specified in Table A and normal contact spacing is extremely low and well b...

Страница 38: ...ot use these half wave rectifiers The capacitance of the vacuum interrupter in combination with the leakage currents in the rectifiers and its DC voltage measuring equipment may result in applying pea...

Страница 39: ...l trip operator Figure 1 m inward which is located at the top of the escutcheon and the circuit breaker open closed indicator will now display BREAKER OPEN 3 Control Voltage Insulation Integrity If th...

Страница 40: ...y is arranged to cause the 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 cir...

Страница 41: ...ism must be checked outside the circuit breaker compartment The emergency racking drive shaft can be accessed by moving the emergency racking drive shaft shutter Figure 1 e downward Note The emergency...

Страница 42: ...uit breaker For all other constructions refer to the appropriate instructions or instruction bulletin s for the applicable racking procedures The circuit breaker is designed to be electrically racked...

Страница 43: ...h Figure 12 a from left to right until it has fully engaged the housing of the secondary disconnect plug Figure 12 c 2 Inserting the Circuit Breaker to the Test Disconnect Position Prior to inserting...

Страница 44: ...if working on energized equipment WARNING In the event of an emergency such as loss of control power the ARM circuit breaker is equipped with an emergency racking mechanism which enables racking the c...

Страница 45: ...nt When the circuit breaker is racked into the compartment the force needed to rotate the racking handle will be high at the beginning of motion due to the force required to start the racking drive of...

Страница 46: ...d pull the circuit breaker out of the circuit breaker compartment using the handles 3 Emergency Racking Out Procedure To perform this action the circuit breaker compartment door must be open If the eq...

Страница 47: ...ess to the racking drive 3 Turn the racking handle clockwise until the breaker position indicator displays BREAKER TEST DISCONNECTED 4 Remove the racking handle and verify that the emergency racking d...

Страница 48: ...t 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...

Страница 49: ...strial 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 Maintenance B Mechanism Area 2 Lubrication f...

Страница 50: ...ol 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 Oil B...

Страница 51: ...igure 13 k C Oil Avoid lubricating on operating pushrods Fundamental Linkage Pin Figure 13 f C Oil Apply to penetrate where pin passes through end link Main Closing Spring Guide Rod Figure 13 b C Oil...

Страница 52: ...g Jackshaft Support i Crank Pin m Pawls l Close Latch Shaft Face f Fundamental Linkage Pin k Jackshaft Lever Pin n Motor Drive Shaft Roller Needle Bearing j Ratchet Wheel h Pawl Support Arm b Main Cl...

Страница 53: ...ag Support Pin s Open Closed Flag Drive Lever Pin at Jackshaft v Jackshaft Outer Bearings Support z Motor Drive Shaft Coupling aa Wheel y Motor Drive Shaft Support Bearings x Camshaft Needle Bearings...

Страница 54: ...mpressed for Removal a c b d e a Bolt b Flat Washer c Bracket d Spacer e Connecting Rod Figure 16 Main Closing Spring Assembly Installed a b d c e a Bracket b Bolt c Lock Washer d Flat Washer e Spacer...

Страница 55: ...of the main closing spring assembly the connecting rods Figure 15 e can now be unhooked from the spring yoke pins and the main closing spring assembly can be removed Note Care should be taken on reas...

Страница 56: ...closing spring To adjust the pawl perform the following steps 1 Remove the escutcheon to gain access to the head of the bolt holding the adjusting eccentric 2 Loosen the bolt slightly 3 Grip the eccen...

Страница 57: ...the circuit breaker main spring 5 Manually CLOSE the circuit breaker 6 Slowly turn the secondary trip prop adjusting screw Figure 19 c clockwise in 1 8 turn 45 increments until the breaker trips OPENS...

Страница 58: ...rmature Tilting the armature by applying a load to the right of the feeler gauges will produce incorrect results 13 Choose one of the following steps according to the TRIP status i If the circuit brea...

Страница 59: ...tch check switch contacts should close when the latch check operator is between 0 045 to 0 015 away from the secondary trip prop adjusting screw 6 Depress the manual close operator and rotate the cran...

Страница 60: ...will decrease Because the factory setting of the lock nut gap varies for each vacuum interrupter a label is provided on the lower part of each vacuum interrupter The original factory setting of the ga...

Страница 61: ...t breaker and record the opening time The opening time from energizing the shunt trip coil to vacuum interrupter contact part should not exceed the values in the timing table Table C Timing Cycles Clo...

Страница 62: ...riginal parts Tables E F and G list the recommended spare parts to be carried in stock by the user The recommended quantity is not specified This must be determined by the user based on the applicatio...

Страница 63: ...ssembly for replacement and installation procedures 5 Undervoltage Device Assembly UV Refer to service manual 01 4SM 1800B Undervoltage Assembly for replacement and installation procedures 6 Charging...

Страница 64: ...Rated kV Rated Continuous Current Primary Disconnecting Device Vacuum Interrupter Operating Pushrod Assembly 38PV40ARMM 4 38 3000A 62201P32 150 36090B 29292G00000107 38PV40ARMX 4 38 3000A 62201P32 15...

Страница 65: ...s 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...

Страница 66: ...ocedures PowlVac 38 ARM 3000A Series 4 Vacuum Circuit Breaker 01 4IB 65131 Figure 21 Control Devices a Primary Shunt Trip Coil 3 cycle b Primary Shunt Trip Coil 5 cycle c Charging Motor Assembly d Clo...

Страница 67: ...ts Description Catalog Number Illustration Auxiliary Switch 102112PB Ground Connection 40767G10 Latch Check Switch BA 2RV2 A2 Motor Cutoff Switch Assembly 50756G03 PowlVac Hardware Kit 60500G24 PowlVa...

Страница 68: ...ervice Division Houston 7232 Airport Blvd Houston TX 77061 Tel 1 800 480 7273 powellind com info powellind com 2006 Powell Industries Inc All rights reserved 38kV 40kA 3000A 01 4IB 65131 PowlVac 38 AR...

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