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Allis-Chalmers BWX-6637-5, Instruction Book

The Allis-Chalmers BWX-6637-5 Instruction Book is a comprehensive manual designed to guide users through the proper operation and maintenance of this exceptional product. Available for free download at 88.208.23.73:8080, users can easily access this invaluable resource to optimize their experience and ensure long-lasting performance.

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I 

I 

I 

•. 

! . 

SECTION  II I. 

MAINTENANCE  AND 

ADJUSTMENTS 

A. 

MAINTENANCE 

Occasional  checking  and  cleaning 

of 

the  breaker  wl 

II 

promote 

long 

and  t

r

o

u

b

l

e

-

f

r

e

e 

service. 

A  pe

r

io

d

!� 

in

s

p

ec

t

i

o

n 

a

n

d 

se

r

v

ic

i

n

g 

at 

i

nt

e

r

v

a

ls 

of 

six 

m

ont

h

s 

or  one  year  should 

be  Included  In 

the 

maintenance 

r

o

u

t

i

n

e

. 

Circuit  breakers 

lo

c

a

te

d 

in 

a

r

e

a

s 

subject  to 

acid 

fumes,  cement  dust,  or  other 

abnormal  conditions, 

r

equ

i

r

e  more 

f

re

q

u

ent  servicing. 

After 

a 

severe 

overload 

Interruption,  the 

breaker 

should  be  Inspected. 

If 

t

h

e 

circuit 

b

r

e

a

k

e

r 

is  not  ope

r

a

t

e

d 

d

ur

i

n

g 

extended 

pe

r

i

od

s

, 

it 

should 

not  remain 

in 

e

i

t

h

e

r 

the  closed 

or 

o

p

e

n 

position  �ny  lo

n

g

e

r 

than 

six 

months. 

Maintenance 

opening 

and  closing 

operations 

should 

be 

m

a

de 

to 

ensure  freedom 

of 

m

oveme

n

t  of  a 

I I  

parts. 

: 

A 

sugg

e

s

t

e

d 

procedure 

to 

follow 

during 

malntenanc�  Inspections 

Is  gi

ve

n 

below: 

1. 

De-energize 

the 

primary  and  c

o

n

t

r

ol 

c

i

r

c

u

it

s

.

: 

2. 

Rack 

cubicle-mounted 

breakers  of  the  drawout 

type 

to  the 

disconnected 

p

o

s

i

t

i

o

n

. 

3. 

Discharge 

stored-energy  s

p

r

i

n

g

s

. 

4. 

Remove 

arc  chutes 

and 

ex

a

m

i

n

e 

for 

b

u

r

n

e

d

, 

cracked, 

or  b

r

ok

e

n 

p

a

r

t

s

. 

5. 

Wi

p

e 

the 

contacts 

w

i

t

h 

a  clean 

cl

o

t

h 

s

a

t

u

r

a

ted 

w

it

h 

a 

non•toxlc 

cleaning  fluid. 

6. 

R

e

p

l

a

c

e 

badly  burned  or  pitted  contacts. 

(

Se� 

paragraph 

E). 

]. 

Wipe 

aiJ 

insulated  parts  with  a 

cl

e

a

n 

cloth 

saturated 

with 

a  non-toxic 

cleaning 

f

l

u

i

d

. 

8. 

B

e

a

r

i

n

g 

pins  and  o

t

h

e

r  sliding  or  rotating 

$urfaces 

should 

be  clea

n

e

d 

and 

then 

c

o

a

t

e

d 

with 

a 

li

g

ht 

film  of 

grease 

(

S�e 

p

a

r

a

g

r

a

p

h 

6). 

9. 

Operate  the 

breaker 

manually 

In  maintenance 

cl

p

sl

n

g 

position 

(see 

paragraph 

C) 

to  check  latch  and  linkage  movemept. 

10. 

theck 

breaker 

adjustments 

(see 

p

ar

a

gr

a

ph 

D). 

: 

l 

B. 

LUBRICATION 

l

u

br

i

c

a

t

i

o

n 

should  be 

a 

p

a

r

t 

of  thp 

service  procedure. 

Needle  bearings 

are 

packed 

with 

grease 

and  should 

r

equ

i

r

e  no  further  attention. 

Old 

grec1se  should  be 

removed 

frooa  bearing 

pins 

and  9ther 

rotating 

o

r 

sliding 

surface�, 

and 

they  should  be 

w

i

p

ed 

with 

a 

thin 

film:of 

petroleum-oi 

1 -base 

precision-equipment 

grease  s

i

m

i

l

a

r  to 

BEACON 

P-290.� 

Greasing  should  be 

d

o

n

e 

with 

care 

b

e

c

aus

e 

excess 

grease 

t

e

n

d

s 

to 

collect 

f

o

r

e

ign 

matter  which  in  time 

may 

make 

operation 

sluggish 

a

n

d 

may  affect 

the 

diel,ctrlc 

strength 

of  insula­

ting 

members. 

- 6  -

Summary of Contents for BWX-6637-5

Page 1: ...i r l f i i I i Ii AWS CHALMERS I INSTRUCTIPN BOOI l AIR CIRCUIT BREAKER TYPE LA 600 APRIL 1967 ...

Page 2: ......

Page 3: ...F STORAGE G MAINTENANCE H RENEWAL PARTS OPERATION A DESCRIPTION 1 Manually Operated Br aker 2 Electrically Operate Breaker B RACKING MECHANISM ORAWO T I NTERLOCK AND LIFTING BAR MAINTENANCE AND ADJUSTMENTS A HAINTENANCE B LUBRICATION C MAINTENANCE CLOSING 0 ADJUSTMENTS E CONTACT REPLACEMENT I I j STATIC OVERCURRENT TRIP DEVICE A INTRODUCTION B DESCRIPTION t SELECTION OF SETTING 2 MAINTENANCE AND T...

Page 4: ......

Page 5: ...URRENT TR I P DEVICES TYPICAL BREAKER RATING PLATE AND CURRENT TRANSFORMERS SHAFT LOCKS AND CALIBRATION MARKS fOR STATIC TRIP DEVICES PORTABLE TEST SET FOR STATIC TRIP DEVICES TYPICAL TRIP CURVES SELECT IVE STATIC TRIP TYPICAL TRIP CURVES DUAL STATIC T IP CONNECTIONS FOR FUNCT I ON TEST TYPICAL RELEASE MAGNET TYPICAL SECONDARY DISCONNECTS TYPICAL AUXI LI ARY SWITCH TYPICAL SHUNT TRIP TYPICAL UNDER...

Page 6: ......

Page 7: ...ponsibility for allied equipment of any kind C RECEIVING AND INSPECTION FOR DAHA3E Immediat ely upon receipt of this qu ipment carefully remove all packing traces and e amfne parts checking them against the PiCking list and noting any damages incurred In tran sit If such is disclosed a damage cl im should be filed at one with the transportation cowpany nd Allis Chalmers notified O CAUTIONS TO BE O...

Page 8: ......

Page 9: ...accessory devices should receive a thorough check prior to placing the breaker in se rvice to be certain that adjustments ere proper and parts are not damaged J C ubicle mounted breakers of the drawout type are equipped with a draw out i nterlock to prevent movement of a closed br aker Into or out of the connected position See Section II of the lpstruction Book for a description of the Interlock I...

Page 10: ......

Page 11: ... _ __ NJj lll l SIW T DI TA A UtfA lVIllll DCTAl 1 U TI l L fMI WIR Jr F IG I TYPICAL LA X BREAKER OUTLih a AIICH 7 IMT 72 44 H 6 401 w a T y D r en I n E 1 ...

Page 12: ... ...

Page 13: ...SPRING 210 CLOSING CAM 211 PAWL 212 SPRING 213 TOGGLE LINKAGE 214 NUT 215 TRIP SHAFT 216 TRIP LATCH FIG 2 21 l SPRING 218 STOP 219 ROLLER 220 TOGGLE LINKAGE 221 SCREW 222 RACKING SCREW 223 CLEVIS 224 RAIL TYPICAL OPERATING MECHANISM MANUALLY OPERATED BREAKER CAP CH Z 1967 7Z 340 014 401 225 LINK 226 PIN 227 PIN 22a SPRiNG l s rn en ...

Page 14: ......

Page 15: ...e permlts spring 2 7 to collapse toggle linka ge 213 and 220 At th e same time trip lat t a 216 ls reset by torsion spr i ng 228 as shown In Oetai I 611 r srd ng down spring release latch hood 202A after the clos i ng handle is ret rned to the normal vertical position releases the energy in spring 209 Thro gh link 225 closing cam 210 Is rotated ccunterclo e agai nst roller 219 which moves togg le ...

Page 16: ......

Page 17: ...2 MOTOR CUT OFF SWITCH 2 33 PLUNGER 2 34 FLAT SPRING 235 GEAR 236 PINS 237 TOGGLE LINKAGE 238 MOTOR GEAR BOX PINION 239 MOTOR 240 GEAR SEGft4ENT 241 PIN FIG 2A TYPICAL OPERATING MECHANISM ELECTRICALLY OPERATED BREAKER MARQi 10 19 7 72 10 011 401 r T 1 a n I I 1 Aa T r TYPICAL WIRING DIAGRAM fOR El ECTRICAL LY OPERATED BR AKERS _ _ FIG 401 ...

Page 18: ......

Page 19: ... with the geari ng disengaged The motor cut off switch is actuated by the movement of plunger 233 over pins 236 Approximat ely twelve seconds are required for completion of the spring charging cycle The brea ker may now be closed by pushing down spring release latch hood 202A as In the manually operated breaker or It may be close d electri cally through remote close control switch CSC 1 Th is swit...

Page 20: ......

Page 21: ... fl AALLIS CHALMERS TRIP SHAfT SlOE VIEW FIG 4 TYPICAL RACKING MECHANISM 8 DRAWOUT INTERLOCK APRIL 3 1967 72 440 0to 401 I L IHIHG ...

Page 22: ......

Page 23: ... The breaker should now be pushed along the rai I s to the DISCONNECTED position At the same time the racking clevises 405 should be checked to see that they are In correct alignment with cubicle fixed pins 403 Counterclock 11ise rotation of the operating crank will now rack the breaker Into the TEST find connected posIt I ons At the TEST and connected positions interlock 408 is In Its normal hori...

Page 24: ......

Page 25: ...tored energy s prings 4 Remove arc chutes and exam ine for burned cracked or broken parts 5 Wi pe the contacts with a clean cloth sat ura ted with a non toxlc cleaning fluid 6 Replace badly burned or pitted contacts Se paragraph E Wipe aiJ insulated parts with a clean cloth saturated with a non toxic cleaning fluid 8 Bearing pins and other sliding or rotating urfaces should be cleaned and then coa...

Page 26: ......

Page 27: ... G HANDLE 1 1 r J j __ ___ RELEASE LATCH HOOp ls r L 205429 TYPICAL t i MAINTENANCE CLOSING HANDLE ELECTRICALLY OPERATED BREAKERS STEP 1 f STEP 2 MANUAL TRIP ROD REFER FIG 2 DETAIL D REFER TABLE PG 7 FIGURE 5 205430 TYPICAL MAINTENANCE CLOSING HANDLE PROCEDURE I MAINTENANCE CLOSING ...

Page 28: ......

Page 29: ...ectrically operated breaker the actual main tenance closing ope ration Is the same for both the electrically operated breaker and the ma dlly operated breaker Refer to Tab l e 3 and F i gure s r TA6LE 3 1 AINTfNANCE CLOSING OS G CONTACTS I Pla e blade of crewdriver between hood and pring release lat h Pu h down pring relea e latch and hoId It in this position 2 Pull clos ing handle DOWN A L THE WA...

Page 30: ......

Page 31: ... SPRING GUIDE 611 WASHER 612 CLEVIS 61 CONTACT 615 SUPPORT 616 STUD 619 CONTACT FINGER 620 ARCING CONTACT 621 NUT 617 MAIN CONTACT 62Z ARC RUNNER 62 3 SPRINGS 624 SCREW 618 PIN FIG 6 TYPICAL PANEL ASSEMBLY MARCH 8 1967 72 34o 020 I 2 SPACERS 626 BAR 627 SCREWS 628 SPRING SET SCREW WRENCH 629 CONNECTOR 630 CONNECTOR ...

Page 32: ......

Page 33: ... contact 620 in any one phase touching the mating stationary contact when the breaker is closed by the main te ance closing method see Table 3 the phase to phase variation should not exceed 062 Adj ustment may be made by positioning screws 608 as In pa rag ra ph 2 but it is essential that the main contact coo1pression be ma i n ta i ned within the tolerance listed in paragraph 2 Arcing contact pre...

Page 34: ......

Page 35: ...ors 629 and 630 After the contact fingers are replaced connector 629 should be positioned fn the center of the slot in the molded base to assure correct alignment of the primary disconnect fingers 2 Stationary Arcing Contact The stationary arcing contact Is a part of connector 629 and may be replaced by proceeding as above In this case screws 624 must be removed However to provide clearance for re...

Page 36: ......

Page 37: ...phenolic be placed upright in a vise and the open slot in clevis 612 placed again t It as a rest The location of spacers 602 604 and 625 should be noted To minimize adjustment upon reassembly the position of the two screws 608 relative to pin 618 should also be noted Then the two elastic stop nuts 621 should be loosened and screws 608 backed off far enough to remove them from pin 618 CAUTION EXTRE...

Page 38: ......

Page 39: ...to p rov i de D C ene rgy t o t he re l ea s e mugne t t r i p co i l and a l so a regu l a ted D C powe r s upp l y to ope ra t e t rans i s tor c i rc u i ts Pot e n t i ome te r s o r rheos ta ts connected i n p a ra l l e l w i th the aux i l i a ry t rans forme r s p r ov i de an A C s i gna l vo l tage propor t i ona l to tlt e p r i ma ry cu r ren t Th i ac t s as the i n te l l i gence i n...

Page 40: ......

Page 41: ...cu rves any comb i na t i ons of wh i ch may be s e l ec ted by set t i ngs on t h e f ront pla te of t h e dev i ce Se l ec t i v i ty be tween coo r d i na ted c i rcu i t b reake rs can be ma i n ta i ned t h roughou t the f u l l i n t e r r u p t i ng range o f the c i rc u i t b r eakers The Mode l 0 d ev i ce mon i to rs t he c u r rents i n e ach of the t h ree phases The a r ra ngemen t o...

Page 42: ......

Page 43: ...o r e t he c i rc u i t w i 11 ca r r y u p t o 200 Amp w i t hou t t r i pp i ng he c i r c u i t b r ea ke r Above 200 Amps a t r i p ope ra t i on wl I I oc cu r The p i ck up se l e c t i on i s con t i nuous and may be s e t be tween ma r ks i f des i red Usua l p ra c t i ce i s to s e t a l l p i c k u p knobs a t the s ame ma rk bu t t h i s i s n o t neces s a ry and d i f f e re n t phas...

Page 44: ......

Page 45: ...ro und p i c k up s e t t i ng 40 80 Amps An actua l g round c u r ren t of 320 Amps i s f l ow i ng 320 Amps g round cu r re n t i s fou r t i mes 4X p i ck up a nd w i l l c a u s e a t r i p ope r a t i on I n fou r and one ha l f seconds on the m i n i mum t i me band as shown on the cu r ren t t i me cu rve F i g u r e 7E Howeve r th i s g round c u r ren t i s muc h l ess t h a n t h e pha s...

Page 46: ......

Page 47: ...ups of t i me band s prov i ded one f o r l ong t i me de l ay and one for short t i me de l a y co r res pond i ng t o t he cu r ves on F i g u re 70 The knob a t t he m i d d l e of the l e f t s i de on the Mode l s o OG f ron t p l ate i s a t h r ee pos i t i on swi tch ma rked to I nd i ca t e LONG T I ME BAND SETT I NG The t h ree pos i t i ons proi l de for s e l ec t i on of a M I N I MUM...

Page 48: ......

Page 49: ...u r ren t s between 200 t mps and 2000 Amps w l 1 1 t r i p the breake r after a t i me de l ay de f i ned by t he max i mum l ong t i me cur ve Fi gure 70 Cu r re n ts above 2000 Amps wl 1 1 t r i p t he b rea ke r i n the t i Te I nd i ca ted by the m i n i m um s hor t t i me curve I f t he phase p i ck up s e t t i ngs were changed to 250 Amps t hen the short t i me band wou l d be used for cu...

Page 50: ......

Page 51: ... shaf t Then be s u r e the s ha f t l oc k I s l oos ened see F i g u re 7 B a n d t u r n t he s h a f t coun t e r c l ockw i s e as fa r a s i t w i I I go Keep t he s ha f t I n tha t pos i t i on and re p l ace the knob so tha t i t i s d i r e c t l y ove r the r ed ca l i b ra t i on dot T i gh ten the s e t s c rew I n t h e knob W i th t h e s h a f t l oc k l oos ened t h e knob ma y no...

Page 52: ......

Page 53: ... t i on Tes t P roced J Th i s sec t i on will des c r i be i n d e ta l 1 t he s teps t o be ta ken to ca r ry ou t t he tes t s Tes ts may be conduc ted on t h e cQnp l e t e c i rcu i t b reake r e i the r I n the d i s connec t ed cub i c l e pos i t i on o r removed f rom the CIJ b i c l e I t I s no t r equ i r ed t o r emov e o r d i s connec t any pe rmanen t w i r i ng on the c i r cu i t...

Page 54: ......

Page 55: ...1A s et t i ng w i I I g i ve fa s t e r t r i p t i mes S e t t i ng s othe r t han N requ i re more cu r ren t to ge t the des i r ed mu l t i p l es of p i c k up e g 3 Amps a t E s e t t i ng i s r equ i red for 3X p i ck up The f u n c t i on t e s t ma y be repea t ed u s i n g t erminals 2 4 and 3 4 Mod e l A I a n d D o r t e rm i na I 3 2 Mode 1 AG a nd DG I t i s not re comme n de d t o ...

Page 56: ......

Page 57: ...420 MODE L 0 D 1 SELECT IVE S TAT I C TR I P DEV I CE F I G 7 20542 1 MODE L AG AG 1 DUA L STAT I C TR I P DEV I C E r A at l MA YJ Ii J f i J I I O i 2054 1 9 MODE L DG SE LECT I VE STAT I C TR I P DEV I C E TY P I CAL STAT I C OV ERCURRE NT TR I P DEV I CE S DAT E 2 24 67 ...

Page 58: ......

Page 59: ... u re does not r es e t d u r i ng t r i p ope r a t i on s exp I a i ned a bove s pace r s 808 may b e a d de d t o ob t a i n pos i t i ve r e s e t of the a rma t u re I f a d d i n g s pa c e r s d oe s not a l l ow a rm a t u r e to be rese t t h e magne t i c re l e a s e l a t ch s hou l d b e rep l aced I f b reake r mechan i s m i s n o t a t fau l t Do not a t t emp t t o d i s a s s emb...

Page 60: ... ...

Page 61: ...e g roups of t rans forme rs as s hewn i n Tab l e 4 I I TAB LE l CURRENT TRANS FORMERS i _ _ _ _ _ _ ___ _ _ _ _ _ _ _ _ _ _ _ __ _ _ i I TRANS FOHMCR AVA I LAB LE CONT I NUOUS CURRENT RAT I NGS I I GROUP NO ANO KNOB POS I T I ONS I A B c 0 E 40 50 60 70 Bo I I 75 95 1 1 0 1 30 I SO I I I 1 25 1 55 1 75 220 250 I V 200 250 300 350 4oo v 300 375 450 525 6oo __ Th LA 1 600 and other 1 1LA1 1 b reak...

Page 62: ... I ...

Page 63: ...ERS 205424 Qli LOOSEN SHAFT LOCKS BEfORE R OTAT H G KNOBS SHAFT LOCKS 205422 F I G 78 SHAFT LOCKS AND C A L I B RAT I ON HARKS FOR STAT I C OVfRCURRENT T R I P DEV I C E S 205423 CAL l BRAT I ON REFE R E NC E PO I NTS ...

Page 64: ... ...

Page 65: ...AAILUS C HALlVI ERS 1 i A 1 h i it IJ t w l i 205 2 5 1 P O R T A B L E T EST S ET F O R ST AT I C O V ER C U R R ENT T R I P D EV I C ES J ll t W t 1 20 5 24 3 T Y P I CAL T EST ARRANG EM ENT F I G C ...

Page 66: ... ...

Page 67: ... AALLIS CHALMERS F I G 7 0 ...

Page 68: ... ...

Page 69: ... AALLIS CHALM ERS DUAL STAT I C OVERCU R R E N T TRI P D E V I C E M O D E L A A I A G A 2 AG I JANUARY 1 1 9 6 4 TYPICAL CUFNE 71 24 0 5 6 4 04 F I G 7 E t t _ _ ...

Page 70: ... ...

Page 71: ...RMER RtFER PJ RAGRAPH 2 FOR OESCHIPTION OF TEST EQUIPMENT TO TRtP COIL ON CIRCUIT BREAKER _ F I G 7F MODEL A I A 2 MOOCL O H TERMINAL et OCK CONNECTIONS FOR FUNCTI ON TESTS MARCH 7 1967 7 1 1 18 555 402 cJ _____ _1I 4 1 I 1 1 I _ _ 1 o 5 o 0 6 0 7 0 8 0 HODEL AG_AG f DG TERMINAL BLOCK 00 NOT T E ST ON TERMINAL 4 ...

Page 72: ... ...

Page 73: ... TR I P R O D 6 0 2 MAGNET 0 0 3 PLATE 8 04 COIL 805 B R E A K E R T RI P AR M 8 0 6 R E S E T C A M 80 7 R E S E T A R M 808 S PA C E R 8 0 9 N U T FI G 8 TYP I CAL R E L E A S E M A G N E T MAR 2 1 9 6 7 7 2 2 40 068 401 ...

Page 74: ... ...

Page 75: ...s of a s econdary d i s connec t as s emb l y wh i ch i s moun ted on the l ef t s i de of the b reake r Two b l ocks of ten termi na l s each can be mounted on the b reake r The s econdary d i s c onnect as s emb l y i s acces s i b l e f rom the f ront of the breake r and a l i gns w i t h 3 s tat i ona ry u n i t i n the cub i c l e The s ta t i ona ry con tac t s t r i ps s hou l d be l ub r i...

Page 76: ... ...

Page 77: ...m remote l ocat i on S i nce tho s hunt t r i p o l I i s des i gned for a mome n t a ry du ty cyc l e an a aux i l i a ry con tact swi t ch I s used to I n terrupt I t s c i rcu i t i mmed i a t e l y af ter the b reaker I s t r i pped Ene rg l za t l on of the co l I causes t h e a rma t u re to p i ck up and rotate the t r i p a rm coun ter c l ock J i s c t o t r i p the breake r Ex tens i on ...

Page 78: ... ...

Page 79: ...t i ng s c rew 1408 shou l d be s e t to prov i de an a i r gap of 2 5 be tween the s o l eno i d po l e head and a rma t u re w i th t h e dev i ce de ene r g i zed as shown I n the f ron t v i ew A 0611 gap shou l d be ma i n t a i ned be t Jeen t ri p a rm 1 4 1 5 and t r i p ba r J I 1 0 I Jhcn the dev i ce i s ene rg i zed w i t h the b rea ke r c l osed a s s h own i n De t a i l 1 1A1 1 Pi ...

Page 80: ......

Page 81: ... t o c l os e o r open e n a l a rm c i rcu i t upon au toma t i c overcu rrcnt t r i pp i ng of the b reaker The re l ay coi I i s w i red to term i na l s 7 and 8 of the s ta t i c t r i p dev i ce Th i s f s a l a tch i ng type re l ay and re l ay con t a c t s 1 502 arc reset to the open pos i t i on shown by actua t i ng res e t p l unge r 1 506 Spacer washe rs 1 504 are used to pos i t i on ...

Page 82: ......

Page 83: ... t h i n t e r l ock i ng a rma tu res The be l I a l arm re l ay 1 5 1 4 co i I i s w i red t o t erm i na l s 7 a nd 8 of the s ta t i c t r i p dev i ce As th i s i s a l a tch i ng type re l ay t he a l a rm re l ay con t ac t s 1 5 1 2 are res e t e l ec t r i ca l l y to the open pos i t i on s hown by ac t ua t i ng res e t re l ay 1 5 1 1 I f the dev i ce I s no t s tab l e du r i ng b rea...

Page 84: ... ...

Page 85: ... ...

Page 86: ... ...

Page 87: ...may be adj u s t e d i nd i v i d ua l l y I n s teps of 30 d e g r ees Th f s adj us tmen t I s made by remov i n g cover 1 202 and l i f t i ng the en t i re r o t or a s s emb l y ou t of ca s e 1 20 1 a f t e r d i s conne c t i n g a rm 1 20 5 f r om the l i nkage Refer t o De ta i l 1 1C11 Cot ter p i n 1 208 and bear i ng 1 206 a re removed to pe rm i t remova l of ro tors 1 204 f r om s h ...

Page 88: ...I _ ...

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