Westinghouse DK-15 Manual Download

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Type DK- 15 and DK-25 Air Circuit Breaker

DK AIR

CIRCUIT

BREAKER

Thermal Overload Trip

Calibration

24°c.

AMB.

The

100%

sett ing i s the

normal rat ing of the Thermal
Overload Tr i p unit ,

The Therma l Trip cali

bra t i on i s adjustable between

the lO

and

150%

sett ings .

Instantaneous trip ping

oc curs at or above

1000%

normal rating,

�

11.1

o.&
0.4
0.3

Fig . 7

The rmal Ove r l oad Trip C a l ibrat i on

C urve 2 5 8872

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Summary of Contents for DK-15

Page 1: ...BREAKER Printed in U S A ll 41 Frontispiece 3 Polef 600 Ampere1 600 Volt A C 1 250 Volt D C Breaker Westinghouse Electric Manufacturing Company East Pittsburgh Pa I B 5965 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 2: ...ell as on the coordination and freedom of all moving parts The plU pose of this Instruction Book on the DK circuit breakers is to provide a guide for those charged with these responsibilities It is not possible to outline a procedure that will apply in all cases The fre quency and character of inspection will for the most part be a matter of experience In general light monthly inspection with a th...

Page 3: ...the closed position Check the movement of each arc tip through the throat of the De ion11 arc interrupting chamber to make sure that the tips do not rub against the ceramic side plates Continue the closing motion until the moving arc t just touch the sta tionary arc tips Check the main contact separation at approximately 5 32 inch as shown on the two drawings 4 D 2515 and 4 D 8316 The moving arc t...

Page 4: ...at each step to the final tripping c oggle 1 1he1 e a very lO i but consistent load is maintained with one sirr ple adjustment This adjust screw will be found in the front of the main frame behind the molded plate as shown on drawings 4 D 2515 and 4 16 l hi adjustment is set slightly over toggle to produce a tripping load of 2 pounds at the tr rod when the breaker is ful closed The facto ry ad jus...

Page 5: ...ristics of curve 258872 at 40 C for instance the calibration ad justment should be set at approximately 108 for minimum tripping at normal current rating The calibration adjustment can therefore be set as close to the normal running current of the motor as is desired depending on ambient temperature frequency of starting etc Complete protection is thus af forded under all conditions of operation F...

Page 6: ...motor closing current One adjustment between the motor mechanism and the breaker closing lever should be checked for proper operation Close the breaker manually and rotate the motor by hand This is done by removing the plate at the lower end and rotating the armature in the direction of the arrow until the crank roller is just passing over the heel of the cam There should be from l 64 to l 32 inch...

Page 7: ...trip by this dead push Adjustment to provide this operation is made by shortening or lengthening the flexible link detail When the undervoltage attachment is furnished with a time delay tripping feature the oil dash pot should be removed by unscrewing the pot when the above adjustment is checked Reverse Current Attachment The reverse current attachment is used to trip the breaker when the directio...

Page 8: ...t J Tlf P IN IS Sl Cf NDI Clf LDNfll l WITH 12S j SCALE SETTINfl ADJUST f HI IIl TRlllW SD IIII AKI II CAN 1 T fii IPCD WITH 2 1 11 tI De DEAD PIIP t WITH I DAD AP IIJJED 71 flll l TIIIP D IN TNC 1 ltr TIDN A IIIIDK J Dt J II CI IItCLY WI TN Ut lt NUT BIPrJIIE Al f ILYII Ifl LDAD NS T TIIIP D II LY A UIT THIS ICIIl W 1rl ltvi 4Ill AI I flAP BETWEEN NII JI JI C ARMATIJ IIC AND MAl NET DI I 4L DVEII...

Page 9: ...l f1P Vq C Jif 11 IIT AS M4 KED ON SC14L PI AT THE SETTIN f Wli i INDICATE THE MINIMIJ 11 Tlfllf1PIN i CIJ II E NT IN i IN AMBIENT 0 24 t ADD I IN CAI 1 IIAT CN J tllf IACH t 6C IllS IN AM liEN ADJUST 71111lET SC RlW SD 8 IIAKE CAN8 T IIPPED WITH 2 J S 1 OZ DE AD PU Wl fl f LOAD APPLIED THill iiiiP rOD IN THE Dl fEC T ON 0 1 Alt fOW LOCi ECIJ f LY WITH Lt ICK NIJT FJE Difl APP4 f1NI I C A j Adjust...

Page 10: ...A TH MINIM LIM EKPEI TEO VAI I IU WHEN H 11 1 t lr EIIS A IC WEI L LAPPED AND Dll s 22 12 1fi IS II IL Eif 0 AND 40 30 10 0 10 os 04 o3 oz I 0 70 It ll OP P D 1 t N PA ITICI ES 1 1 1 1 1 1 1 I r i IIA7i r i 1 D I 11 Jl IT _ v I vi 16 IA v r l p lj iS Tl rL II 1 r 5 2 J JO PE ir t ENr NOiirMAL Ai N ON ION IB A 7 L 1 J NS i IP 1JVAI OV Il _ 1 t Calibration of Oil Sucker Magnetic Dual Overload Curve ...

Page 11: ...TIMJ If rN iHI Mif4 OV4 1t 7 li O 1 NI r nn 71 11 iNI IMIU iJI 11 CALl 4 1fr CN IS IDt USTif8LI IN A ll lO I 10 Sri z l iWIIN rilE IOOtlfe AND IC tl I TTINfJ INSTA Vr Nrcvs rMINI NtJ OCCI I If Ar Oil ASOVE ICOOI o 1 NO CMAL 1 tll r NfJ 1 I IJ Sc I G Y AIIT 7 l P I iA lv r NOTI iJ IIS c 1 CV 28 SI I I 11 4 n ff Calibration of Thermal Magnetic Dual Overload Curve 258872 9 w w w E l e c t r i c a l P...

Page 12: ...IIT S Y JIEi AY WNICH 0 ffiiN rr s CCN1 4C1 AN C 111 11 Sit IN T f CCJw 1 CON1 W S Ait lll c cs s o MC1 Cll C ON r INI l S 1 W 11 1 5 0 ENS CIITTI 1 5 o r MCTO t IIELEASINS CONT OJ SWI C 1I y WJI I at IN 11 18 AND WILL CLC IT CCf TiiiCr L EGENO M MOiC I Y t4NTI J l IMJi III IIW LS I I IMIT SWITCN T 7 1111 COIL Sllilf tEll 1 X iSW nll CI OSES WHGN iiC t IS Ci CS C b r SI E ICI l AU 4 WITCJ I OP NS ...

Page 13: ...w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 14: ...w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 15: ...w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 16: ...w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 17: ...AIR CIRCUIT BREAKER Fig 1 3 Pole 600 Ampere 600 Volt A C 250 Volt D C Breaker PrintM in TT A Instruction Book 5965 E Westinghouse Electric Corporation East Pittsburgh Pa w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 18: ...calibration as well as on the coordination and freedom of all moving parts The purpose of this Instruction Book on the DK circuit breakers is to provide a guide for those charged with these responsibilities It is not possible to outline a procedure that will apply in all cases The fre quency and character of inspection will for the most part be a matter of experience In general light monthly inspe...

Page 19: ...se direc tion to move the contacts toward the closed position Check the movement of each arc tip through the throat of the 11De ion11 arc interrupting chamber to make sure that the tips do not rub against the ceramic side plates Continue the closing motion until the moving arc tips just touch the sta tionary arc tips Check the main contact separation at approximately 1 8 inch as shown on Figs 2 an...

Page 20: ...vice but can easily be checked or readjusted by reference to the sketches For this operation use a small spring balance applied to the left pole trip finger on the trip bar at a point in line with the plunger This 2 pound tripping load must be maintained to insure proper tripping of the breaker by the overloe d trip units and other calibrated attachments Dual Overload Tripping Attachments The DK c...

Page 21: ...ved Re placement is simply the reverse of this procedure After the unit is securely mounted to the panel only one adjust ment is necessary for correct operation with the b eaker This adjustment consists of setting the screw in the outer end of the trip armature lever to properly trip the breaker with a thin spacer between the armature and magnet as explained in Figs 2 and 3 Electric Closing Mechan...

Page 22: ...ontrol voltage ratings Voltage Rating 110 Volt A c 220 Volt A c 125 Volt D e 250 Volt D e Shunt Trip Attachment Closing Current at Normal Voltage 30 Amperes 15 Amperes 30 Amperes 15 Amperes The shunt trip attachment when supplied is mounted rigidly to the breaker frame behind the face plate The trip bar bracket is attached to its lower end When the shunt trip is not supplied its place is taken by ...

Page 23: ... is calibrated and marked on the scale plate at 10 15 20 and 25 reverse current based on normal current rating The reverse current armature is reset after a tripping operation by opening the voltage coil circuit This can be accomplished by wiring the voltage coil through an auxiliary switch on the breaker Field Discharge Switch The field discharge contact Fig 13 14 is normally mounted on a two pol...

Page 24: ... w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 25: ...111 J D BR6AKER t AN I IE TRIPPED ITH FORt 111 Dt CI ITE II DIID TO BE LD D TI IRU TRIP THIC IIIItr ARI UJW UPELY LOCI NUT APPLYING A JVN O f TD TRIP PDLF S DM 14 II H 1 I S n I l T11 I 7 1 TD 2S rD 1 T 3 7S To Z I TD 4 4 7S n I 2 J rc S Fig 2 Adjustments with Oil Sucker Magnetic Dual Overload Drawing 4 D 2515 5 6 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 26: ...NT AS MAWID tiN 041 1 I J ATC TNI IETTIN Wli l INDICATE TNIMINIMUM TI IPIIII ttfl CIIII NT IN AN AMIIINT 1 111 14 t A 1 IN CALIIIIArJI IN liii At H I C Ill IN AMIII NT PovND r ro TRIP Po E r DI S ZlK 2S 1 sro 1 ro 1 L 7S ro I ZS 1 ro 5 3 7Sro I S trol f 1 7 1 n 2 1 1 ro 5 Fig 3 Adjustments with Thermal Magnetic Dual Overload Drawing 4 D 8316 3 7 w w w E l e c t r i c a l P a r t M a n u a l s c o ...

Page 27: ...a s e 739 3 8 16 x 7 8 Fillister Head Ste e l Ma chine Screw 3 8 Stee l Lock Washe r 16 Wide Bra s s Washe r Headle s s Set 8orew 1 4 20 Steel Lock Nut 1 4 Stee l Lock Washe r P in 1 16 x 3 8 Steel C otter P in C r os s Bar P in Moving C ontaet Assembly Frame Linkage Assembly K PV NCH T Tr P P in 5 16 Nickel Ste e l P in 5 16 Sta inles s Stee l Pin 5 32 Nicke l Ste e l PIAl r J I 7 11 I U IKI tiMI...

Page 28: ...w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 29: ...l oy 5 16 x 3 21 32 Grea se 4739 l 16 x l 2 Steel C ot ter Pin 164 Wide Bra s s Washer Pin l 16 x 3 8 Steel C ot ter Pin Headle s s Set Screw l 4 Ste e l Lock Washer l 4 20 Steel Lock Nut 3 8 16 x l l 4 Hexagon Head Ste e l Bolt 3 8 Steel Lock Wa sher Linkage A s s emb ly T ime Delay and Shunt Trip Unit Moving Contact A s s embly Main Frame Linkage A s semb ly Pin 5 16 x 2 9 16 N ickel Steel Pin 5...

Page 30: ...w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 31: ... THE 1 CKEIIS All W E I L I APPEO AND 011 S 2292 9G IS I ILT 111 0 ANCJ 10 5 4 J 1 0 0 05 04 03 cz 0 J 1 1 1 I 1 1 1 I F II E O f f OIPEifiN P AIITICLES THE MAX V AL MAY V AR Y B Y 1 S Vt RA L HUNO R 0 PeR CEN T 1 I tt 1 ON 10 II 1 1 R Ai 2C s AlrtON f l r it L P 1 1 c14 SAI Ai 4 IN Jl 1 IT L v t If ISII N IP 4t el l t TIC J NS7 T f IP W t r H r I I 15 0 200 JOO r DVAi 0 11 tJA J l r r f 11 t E Nr...

Page 32: ...the Thermal Overload Trip unit The Thermal Tri p cali bration is adjustable between the 100 and 150 sett ings Instantaneous tripping occurs at or above 1000 of normal rating 1m ft I I m 5 0 2 00 1100 50 40 30 20 10 1 _ I II II tt F IJIW II tttl II If S Frr Ci Ill I n I I 111 I T IP tt 00 r J rr 1Nfi i I ntn C FNr I D MAL l M I DO 00 IAr lsf t I I I Fig 7 Thermal Overlqad Trip Calibration Curve 887...

Page 33: ...1 s C I N I t IJ7TING OFf MC iC 1f18t ll q6JN I CONTIICII WI fCI Y W 1 4 IJEIN HIZE AND WJ Lk CI CIE 1 1 COIIIT At T F OR 460 v 7 II A C I N _ t Et ENO oil rMOTOll Y A41 fl lfli MP IIII IIY LIMI T WITCH Til TII P COli Q IIIII A1ti Jl A IX SW IT CI t LO E Wllfi tl IS Ci OSED b 1 l lillttiC lii Jt W TCW OP NI WHI N ltC IS C40 SIO Y YRIJ IIY C ON f ACT C OSIIJ tAININ llt I IIY O NI IIGI ZID t NIJ WNI...

Page 34: ...w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 35: ... 4 Standard Lock Washer 3 1 4 20 x 1 2 Hexagon Head Steel Bolt 4 1 4 20 Hexagon Stee1 Machine Screw Nut 5 Shakeproof Lockwasher 6 190 32 x 1 2 Fillister Head Steel Machine Screw 7 Washer S 779354 Fin 8 3 32 x 3 8 Steel Cotter Pin 9 Pin Lock Washer Washer S 779355 Fin Link Switch As sembly Fig 9 Auxiliary Switch and Mounting As sembly Drawing 7 B 9438 10 w w w E l e c t r i c a l P a r t M a n u a ...

Page 36: ...w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 37: ...TED coNN suPPt l tJ CNLY WNI N Of l EfltfD O P E R ATION 1 CoNTitOL 6W e s c C LOie s 2 MoTO R STA RTS THROU4H BKR ux SW b L IM IT W C LO S 1 E ORI lSKR TA T S TO CL OSI 4t BKfll IN C LOSIN O PCNS AUK SW b Re Le A se eo HT R oL sw c s t FT R BKR STAII T S TO C O C 6 8klt C LO 7 MOTOflt lilVN UNTIL 6 OP L f GEND M Moro L l IMIT W T TRIP CDIL a BKR U W CL051lD W HEN BKR I CLO S D b BK AUK w OPe N WM...

Page 38: ...DK 15 and DK 25 Air Circuit Breaker J 2gt J d gl a Cfj i Q d s J 0 j 91 Cl a Et t I Fig 11 Motor Mechanism an d Anti Pump Assembly Drawing 4 D 8494 3 15 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 39: ...Type DK 1 5 and DK 2 5 Air Circuit Breaker Fig 12 Reverse Current Trip Drawing 8 D 2969 16 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 40: ...t Breaker F Y A A A j i i I 4 P AV f Sill U ND Yo r A r H I P o El CT IC iOCK OVr IJELL llt IIRM ___ _ __ CtJNrACT 5No Vr r 1P Fit O L r i 2 Fig 13 Wiring Diagrams Drawing 5 D 8336 17 i w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 41: ...tion of L 16 32 de ustmen t Bolt 1 Details ing mina l Lock Washer 16 Hexagon Stee l Nut 16 Hex agon Adjustment Powl 1 0 thot is Maintained Stud and l c 8 when Bkr is l o Adjustment I Remove one or Allow fIlid Dl1 open before C Touch when Cl 1 4 LJ I 18 ield Dis charge Switch ing 7 A 89ll5 15 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 42: ...w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 43: ...w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 44: ...w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 45: ...REAKER Fig 1 3 Pole 600 Ampere 600 Volt A C 250 Volt D C Breaker Printed in U S A Rep 9 50 Instruction Book 5965 F Filing No 35 000 Westinghouse Electric Corporation East Pittsburgh Pa w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 46: ...calibration as well as on the coordination and freedom of all moving parts The purpose of this Instruction Book on the DK circuit breakers is to provide a guide for those charged with these responsibilities It is not possible to outline a procedure that will apply in all cases The fre quency anQ character of inspection wil l for the most part be a matter of experience In general light monthly insp...

Page 47: ... c tion t o move the c ontac t s toward the c l o sed po sition Che ck the movement of each arc tip through the throat of the 11De i on11 arc inte rrupting chamber to make sure tha t the tips d o not rub agains t the ceramic s ide plate s C ontinue the c l o s ing motion until the moving arc tips j us t t ouch the s ta tionary arc tip s Che ck the main c ontac t se paration at approximate ly 1 8 i...

Page 48: ... but can easily be checked or readjusted by reference to the sketches For this operation use a small spring bala nce applied to the left pole trip finger on the trip bar at a point in line with the plunger This 2 pound tripping load must be maintained to insure proper tripping of the breaker by the overload trip units and other calibrated attachments Dual Overload Tripping Attachments The DK circu...

Page 49: ...fter the unit is securely mounted to the panel only one adjust ment is necessary for correct operation with the breaker This adjustment consists of setting the screw in the outer end of the trip armature lever to properly trip the breaker with a thin spacer between the armature and magnet as explained in Figs 2 and 3 Electric Closing Mechanism Electrically operated DK circuit breakers are equipped...

Page 50: ...dard c ontr o l v o l ta ge ra t ings Vol tage Rating 110 Vol t A c 220 Vol t A c 125 Vol t D e 250 Vol t D e Shunt Trip Attachment Cl osing Current a t Normal Vol tage 30 Amperes 15 Amp er e s 30 Amperes 15 Amperes The s h unt trip a t tachment w hen supplied i s mounted rigidly to the breake r frame behind the fa ce p la te The trip bar bra cke t is a t tached t o i t s lowe r end When the shunt...

Page 51: ...d and marked on the s cale plate at 10 15 20 and 25 rever s e current based on normal current rating The rever s e current armature i s r e s e t after a tripping operation by opening the vol tage coil c ircui t Thi s c an be accompl i shed by wiring the voltage c oil through an auxiliary swit ch on the breaker Field Discharge Switch The field dis charge c onta c t Fig 13 14 i s normally mount ed ...

Page 52: ... w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 53: ...H Wlf f C L I ADJUST THIS J ET J t REW JD BREAKER CAN LIE THIPPE JJ llti T H F DR IIV tll t JIITE ti L DA JJ TO BE APP ED THRU TRIP FINGCR I N THE 1111 P E I TIDN 4F ARRDW l Ot H S i rt URII L Y W rH LOCI NUT Ill I DFlE APPJ yu IG 1 D D PIIX N D J TIJ T RIP PDLF S 1 11 14 D R 114 1 sro rn l 7 fTl 25 TD 3 73Tol l T 4 4 7Sno J 2 5 l re S Fig 2 Ad jus tments with Oil Sucker Magnetic Dual _Oyerl oad D...

Page 54: ...SULAT ED NUT TD l iTPfJINT E II AT ANY DEIIIfED T IIPPtiV i CIJ flt NT AI M A KED tJN t AL PI AT E T H E J ETT INif W I LL INDIC AT E T H EMINIM U M Tlt IIPI 1 tf CIJII i ENTIN AN AM81E NT tJJI 2 4 t ADD I IN CAL16 i Arlt 7N J J f I A Ii I C Al l i E IN AM I IENr Pof N D r T O TRIP PD J D k 5 Ok 2S 1 sro I or r 1 L 7S TO I ZS 1 ra 5 3 7S T D 2S I r 5 4 73 T t 2 TO I 5 Fig 3 Ad justments with Therm...

Page 55: ...e l C otter P in Grease q 739 3 8 16 x 7 8 Fillis ter Head Ste e l Machine Screw 3 8 Ste e l Lock Washer 16q Wide Brass Washer Headle s s Set Screw 1 q 20 Steel Lock Nut 1 q Stee l Lock Washer P in 1 16 x 3 8 Steel C otter P in Cross Bar P in Moving C ontact Assembly Frame Linkage A s sembly P in 5 16 Nicke l Steel P in 5 16 Stainle s s Steel P in 5 32 Nicke l Ste e l 1 Assembly Wi th or Without C...

Page 56: ...w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 57: ...6 27 28 2 9 30 31 32 33 34 1 16 x 3 8 Steel Cotter Pin Headle s s Set S crew I L PtiCJ PUNC M LE IE2 b H Q 0 Pltll t f 14 IH LAC f J c 1 P if t lt P N c P IW 17 16 7 t IH t i 6 r V 1 1 JIII Z t e 1 I 1 4 Steel Lock Washer 1 4 0 Steel Lock Nut 3 8 16 x 1 1 4 Hexagon Head Steel Bolt 3 8 Steel Lock Washer Linkage Assembly Time Delay and Shunt Trip Unit Moving Contact Assembly Main Frame Linkage Assem...

Page 58: ...w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 59: ...KE i S A i C W 1 4 I APP 0 ANO 011 S i292 9S IS f II T ER O AN O l FI E C Of P Ofl lfiN P A iiCI ES TH MAX V ALUE NAY V AR Y 8 Y 30 zo 10 5 4 J z 0 r 1 1 1 i 1 1 I 1 1 I 1 1 1 1 1 II I II f 10 c I t C L 1 l t S Vt RA L HI JN O R D P R C N T I 1 I r r 10N rJ CA S Ali ON I l7 lZ El llil I IBJ T w I os 04 03 oz 0 tJO J r I If ISfl i p 4 6 R tA m I A i G 1 z Eft TO zoo oo P E C E Nr NO M AI ATIN i J N...

Page 60: ...5 and DK 25 Air Circuit Breaker CURRENT IN PERCENT Fi g 7 The rma l Over load 1l rip Ca librat ion Curve 35 1052 1 1 2 z 1 c U J I 9 8 7 6 5 30 4 3 18 2 12 I 6 09 08 07 06 05 04 03 02 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 61: ...L 5 CIIVN etJiTING O MO TQ _ fi 1 146 N CON TJIC L WI fCIII WIU JEINEHIZI AND WI L CI 0 1 IT S CON T tiiCT F 0 160 v S1S I ot C t1 N Y L EGE NO tllf MDTOAI Y A ITI I IIMP ll lf r t 1 LIMIT WITCN T 7 1P CCII Q SIIIA CIIl 141 X SWire CLOIIS W H IIIC IS CJ O CC b 6CE ICI e UJ It SWITCH OP NI Wl fl 11 I M IS CLOSED f YiliLAY C ONTACT1 CLOSID WNIN LAY D INI GI ZI D AND D IN Wl ll 11 C 1 4Y IS INIIlGII ...

Page 62: ...w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 63: ... 4 Standard Lock Washer l 4 20 x l 2 Hexagon Head Steel Bolt l 4 20 Hexagon Steel Machine Screw Nut Shakeproo Lockwasher 190 32 x l 2 Fillister Head Steel Machine Screw Washer S 779354 Fin 3 32 x 3 8 Steel Cotter Pin Pin Lock Washer Was her S 779355 Fin Link Switch Assembly Fig 9 Auxiliary Swit ch and Mounting As sembly Drawing 7 B 9438 10 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 64: ...I w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 65: ...TTE D COHH SUPPL IUJ QNLV WW N OR l l fl OPERATfON I CoNTIItOL w e s c C LOSI 2 M OTO R STA RT 5 THROUGH SKit AUX SW b 3 l tMIT f W CLO IH fi ORE ISKR TA T S To cc ose 4t BKfll IN CLOS ING O P NS AUJ SW b 5 RE Le l 51 C O T R OL sw c s A FT R BKR TAIIII T S TO C 06t 4 8teA CLO i S 7 MOTOR RUNS iJNTtL L OPI HS l f Gf ND M fii O TO L LIMr T w T TRIP CoiL 0 BKR 4UX W CLC61tD WHEN BKR J CLOSE D b 8K A...

Page 66: ...i j Type DK 1 5 and DK ZS Air Circuit Breaker l d M 0 let 91 a r E J 1 Cr 2 Q I ti t Q 1 d R I 4r Fig 1 1 Mot or Mechanism and Anti Pump Assembly Drawing 4 D 8494 3 15 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 67: ...Type DK 15 and DK 25 Air Circuit Breaker Fig 12 R everse Current Trip Drawing 8 D 2969 16 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 68: ...et lTI j I IL 1 U N DE I YOt r Atf H I P 0 Z Et CTA IC O CK OVI Fit t Y 1 r 41 Av Sill l M L 1 CD ACT SNui Vr T tP rtt 2 fill JeEV lS CVR A E NT T J IP F i 3 Fig 13 Wiring Diagrams Drawing 5 D 8336 17 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 69: ... 16 32 e ts tment Bolt Details ng tinal Lock Washer 16 Hexagon Steel Nut 16 Hexagon Adjustmen t 3 A Pawl eo tho 4 Is Maintained be Stud ono t of F 8 when Bkr is Op 1 1 o Adjustment e I clos Remove one or bol Allow Field Dlscho open before Cir I Touch when Closir 1 4 lJ I 18 e ld Dis charge Switch ng 7 A t 9 15 15 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 70: ...w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 71: ... DK 28 AIR CIRCUIT BREAKER Fig 1 3 Pole 600 Ampere 600 Volt A C 250 Volt D C Breaker Instruction Book 5965 E Westinghouse Electric Corporation East Pittsburgh Pa w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 72: ...ration as well as on the c o ordination and freedom of all moving part s The purpose of thi s Instruction Book on the DK circuit breakers is to provide a guide for those charged with the se re sponsibil itie s It i s not possible t o outline a pr ocedure that will apply in a l l ca ses The fre quency ana character of inspe ction will for the most part be a matter of experience In general l ight mo...

Page 73: ...e dire c tion t o move the conta c t s toward the c l o sed po s i tion C heck the movement of each arc tip through the throat of the 11De ion11 arc interrupting chamber t o make sure that the tips d o not rub against the ceramic s id e plate s C ontinue the c l o s ing motion until the moving arc tips jus t touch the sta tionary arc tips Che ck the main contac t se para tion at approximate ly 1 8...

Page 74: ...but can easily be checked or readjusted by referenc e to the sketches For this operation use a small spring bala nce applied to the left pole trip finger on the trip bar at a point in line with the plunger This 2 pound tripp ing load mus t be ma intained to insure proper tripping of the breaker by the over load trip units and other calibrated a ttachment s Dual Overload Tripping Attachments The DK...

Page 75: ...cement i s s imply the revers e of thi s pro cedure After the unit i s s ecurely mounted t o the panel only one adjus t ment is necessary for c orrec t operat i on with the breaker Thi s adjus tment c onsi s t s of setting the s crew in the out er end of the trip armature lever to properly trip the breaker with a thin spacer between the armature and magne t as explained in Figs 2 and 3 Electric Cl...

Page 76: ...trol vol tage rat ings Vol Rating 110 Volt A c 220 Vol t A c 125 Vol t D e 250 Volt D e Shunt Trip Attachment Closing Current at Normal Voltage 30 Amper e s 15 Amperes 30 Amperes 15 Amperes The shunt trip attachment w hen supplied is mounted rigidly to the breaker frame behind the face pla te The trip bar bracket i s a ttached t o i t s lowe r end When the shunt trip is not supp lied its place i s...

Page 77: ...ated and ma rked on the scale plate at 10 15 20 and 25 reverse current based on normal current rating The reverse current armature is reset after a tripping operation by opening the voltage coil circuit This can be accomplished by wiring the voltage coil through an auxiliary switch on the breaker Field Discharge Switch The field discharge contac t Fig 13 14 i s normally mounted on a two pole break...

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Page 79: ...RI E INZII CJIIT 6 4 D IJ Ttl BE lfPP t IEZI TNRU TRIP F INCEIII IN THI 11 lf E t TIDN DIC ARRI JW J IK lit S ll UllltILY INIY H Lt JCI NUT 1 It APPL YINt LOA rl PriV N D r TIJ T RIP PD LF O M 4 0 lft l4 I IFn I 4 TD I 2 7 n u 2 F TD I IF 3 7 Fr t ts 1 r o 4 4 7 Fn 2 F TO S Fig 2 Adjustments with Oil Sucker Magnetic Dual overload Drawing 4 D 2515 5 6 w w w E l e c t r i c a l P a r t M a n u a l s...

Page 80: ... NU r 10 11rPDINT I 11 ATAN fl IJEII ED llfiiii iNfl CI IIIIIENT AI MA KID tiN I C A 1 PI ATE T H E I T1 1N W l l l INDICAT E T H ENINIMVM 1 lllflllll twl CUIIIIIENTIN AN AMIIINr ti ll M t AIJ 1 IN CALII I A1 tJN P II II I At H I C IIII I IN AMI INT PIX N D r TD TRIP PtU 1 11 1 5 0K2S I 5T O 5 rc I L 7 Src I Z5 1 rc 1 5 3 7fTT D 2 5 I rc I 5 4 7 r o 2S 1 ro S Fig 3 Adjus tments with Thermal Magnet...

Page 81: ...ng C l os ing lever Re set Spring Trigge r P in P in 1 16 x 1 2 Stee l C ot t e r Pin Grea s e lj 739 3 8 16 x 7 8 Fillister Head Ste e l Ma chine Screw 3 8 Stee l Lock Washe r 16lj W ide Bras s Wa sher Headle s s Set Screw 1 l 20 Ste el Lock Nut 1 lj St ee l Lock Washer P in 1 16 x 3 8 Ste e l C ot t e r P in C r os s Ba r P in M oving C ontact As sembly Frame Linkage A s semb ly P in 5 16 Nicke ...

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Page 83: ... 5 16 x 17 32 Nickel Steel Pin C opper Alloy 5 16 x 3 2 1 32 Grea se 473 1 16 x 1 2 Steel C otter Pin 164 Wide Bra s s Wa sher Pin 1 16 x 3 8 Steel C otter Pin Headles s Set Screw 1 4 Steel Lock Washer 1 4 20 Steel Lock Nut 3 8 16 x 1 l 4 Hexagon Head Steel Bolt 3 8 Steel Lock Washer Linkage Assemb ly Time Delay and Shunt Trip Unit Moving Contact As semb ly Main Frame Linkage Assemb ly Pin 5 16 x ...

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Page 85: ...H tlf N MI IM EXPEt T 0 V ALI IE S W H E N THE i S I IC K E S Al 1 W E I I APPEQ ANQ OIL S 2292SS IS FII T E 11 0 AND F IC E O t t Q 1t N P A Ii TICLE T I l MAX V AL MAY V ARY B Y S EVERA HI JNO R D PER C N T 1 I 1 I 1 1 f I f 5 1 1 4 A7i 1 f 1 1 l 0 Lti L s I T l 1 v 1 i Po v f SA A v t p 4t jl ile 1 r 1 15 0 2 t300 ON CA lS fA triON 2 I w _ INS T T IP W tri l DV AL OV 11 DA i J 1 r f IE IC C E V...

Page 86: ...B The 100 sett ing i s the normal rat ing of the Thermal Overload Trip unit The Thermal Trip cali bration is adjustable between the lOG and 150 sett ings Instantaneous tripping occurs at or above 1000 of normal rating s 0 z r4 11 1 1 o 0 4 0 3 II II II ll Fig 7 Thermal Overload Trip Calibration Curve 258872 11 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 87: ...tNVI I tiN f 1 L CN 11 1 l i11 TIN i Of fr MC T0 2 AIIL I4biN CON riiOL JWI CI I Y W IL I IM INENIZI AND WILL CI C 1 l f S CCNTifC T f OR 4 6 0 V S1S tl A C tl L y Mc rott Y A VT JIItiMI IIIL If 1 1 I MIT WI rCN Tt T I P COIL Q 111 l llcl IWX SW rt r CJ OSI WIIN Ilk IS Ci 0 1C b AlE II I Il li I 4 WITCH Of ltNI WNI 11 I Jl 1 CI O SID f YRIL RY C ONr4CT1 CLOSI D WNIN llli RY CtiNIIIGIZIC lfNIJ OI I...

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Page 89: ... Lock Washer 3 1 4 20 x 1 2 Hexagon Head Ste e l Bolt 4 1 4 20 Hexagon Stee l Machine S crew Nut 5 Shake pr oof Lockwashe r 6 190 32 x 1 2 Fillister Head Steel Machine S crew 7 Washer S 779354 Fin 8 3 32 x 3 8 Ste e l C otter Pin 9 Pin 0 Lock Washer 1 Washer S 779355 Fin r r _ 5 Link 6 Switch A s s embly Fig 9 Auxi liary Switch and Mounting A s s embly Drawing 7 B 9438 lO w w w E l e c t r i c a l...

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Page 91: ...E D CONN JUPPI IE JJ ONLY WNI N OR DEI Cfl OPERATION I CONT ItO w C S C CLOSES 2 MOTO R ST A RT t THROU iH et R AUX SW b l tMIT SW CLO SL B FOI t BKR TA T 5 TO CLOS 41 f3KFt IN C 0 1NG OPt NS AUJ SW b 5 RI Le A e C O I ofT R O W c s A FTE R BKR T AIIt T S TO C t 06C 8KIIt CL0 5 I 7 MOTOtlt AUNI UNTIL L6 OP L f GEN D M MoTo L S l IMIT w T TR IP Cot 0 BKR A UX SW CLO UtO WHEN BKR 1 5 CLOSe D b BKR A...

Page 92: ...K 1 5 and DK ZS Air Circuit Breaker d M Pt 0 I II td it 2 l n Gn d X gl t t Q 1 aq q t iJ kJ Fig 1 1 Motor Mechanism and Anti Pump Assembly Drawing 4 D 8494 3 15 _ w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 93: ...Type DK 15 and DK 25 Air Circuit Breaker Fig 12 Reverse Current Trip Drawing 8 D 2969 16 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 94: ...aker _ c e L _ L fJ TJL 1 4 1 AV f Sill U NOE PYOJ r Atf r e p o l CT IC i OC K OUI BEI L IUIIRM __ _ __ CtJNrAt T SNo Vr r P rtfi 2 rltf F V Fig 13 Wiring Diagrams Drawing 5 D 8336 17 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 95: ...1 16 12 1ge stud tde 18 e 18 jus tment Bolt 11 Details t ing t minal 3 Lock Washer 3 16 Hexagon Steel Nut 3 16 Hexagon Adjustment Powl so that il Mointoine1 Stud and l 8 when Bkr 11 A i o Adjustment t l Remove one 01 Allow Field Dl open before Touch when C ield Dis charge SWit ch ing 7 A 89J J 5 15 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

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Westinghouse DK-15, Manual

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