Technical Manual NAVY TYPE ACB 1600 FRAME SIZE AIR CIRCUIT BREAKER WESTINGHOUSE TYPE DB N-60S 2600 AMPERES ~ CONTINUOUS DIRECT-CURRENT 710 VOLTS 2 POLES (GENERATOR SERVICE) WESTINGHOUSE ELECTRIC CORPORATION Switch gear Department EAST PITTSBURGH, PENNSYLVANIA, U.8.A.
INDEX DESCRIPTION LIST OF ILLUSTRATIONS . GENERAL DESCRIPTION Identification Data General Construction . . Operation . . . Mounting Control Voltage Maintenance . . COMPONENTS AND ATTACHMENTS Arc Chutes Contact Assembly Operating Mechanism Anti-Shock-Close Device Closing Magnet of Solenoid Closing Relay Anti-Shock-Open Device . Series-Over current-Trip Device Auxiliary Switch Under voltage Trip Reverse~Current Trip . . Repair Parts . .
AIR CIRCUIT BREAKER LIST OF ILLUSTRATIONS FIG. PHOTO OR PAGE NO. DWG. NO. FIGURE TITLE NO.
GENERAL DESCRIPTION NAVY TYPE ACB AIR CIRCUIT BREAKER Westinghouse Type DB N-60S GENERAL DESCRIPTION IDENTIFICATION DATA The circuit breaker described in this book is the generator breaker for the S5563-566 and 580, The identifying “Shop Orders” (which appear on the breaker nameplates) and the applicable “*Certification Data™ are as follows: Certification Data Drowning SHOP WESTINGHOUSE HOUSE BU SHIPS 185-Y-2203 | 405-D-213 | S6563-302-1617335 135-Y-4501 | 405-D-313 | SE563-302-1617385 t See Certification D
Al CIRCUIT BREAKER ARC CHUTES HOUSING CLAMPING PLATE L CROSSBAR CLAMPING | e FEVERS FLARE CURRENT POLE BARRIER ANTI SHOCK OPEN DEVICE TERMINAL BLOCK o, UNDER VOLTAGE DEVICE AUXILIARY SWITCH AHEM PLATE OPERATING | cos HANDLE ot sofi;?fi SHAD oI HAFT Coil INDICATOR T OVER CURRENT SHELF L TRIPPING DEVICE CLOSING RELAY Fig. 1 = Front View of Herewith Breaker (Photo 374996) ©. subtraction. Bearing points in the mechanism breaker dull ina e, it will be ner may b oiled sparingly.
e GENERAL DESCRIPTION BLOWOUT MAGNET COIL, BLOWOUT UPPER STUD ASSEMBLY REVERSE Gl LOWER STUD ASSEMBLY BLOWOUT MAGNET COIL, BLOWOUT e dousing HOUSING COVER | Re Verse CURRENT POTENTIAL coi WIRING UNDER VOLTAGE SERIES RESISTOR Fic, 8 Roy View of (sleuth Shreveport {(Photo 3548 2. The breaker is now disassembled sufficiently for most replacements or repairs. The undercurrent units nay be removed by removing four bex head bolts at the lower stud on the hack of the breaker.
COMPONENTS AND ATTACHMENTS COMPONENTS AND ATTACHMENTS ARC CHUTES (Fig. 4) a. Function. Each pole unit has one arc chute ‘135", The chute, mounted so that it surrounds and extends over the contact assembly of the pole, stretches and cools the arc drawn by the separating contacts. When the arc is drawn, it moves up into the chute by magnetic and thermal action, where it is quickly DE-ionized and extinguished, thus opening the circuit in the least possible time.
COMPONENTS AMD ATTACHMENTS {B) Work the spree @ screwdriver s out of the 5 184" removing To replace the auxiliary contact spring () Remove the are chute '133, In the resews (1477, (b} Work the springs out with o screwdriver and centurion, Loosen the hinge lows i the bolts in wd holding the over cur rip and contact arm hinge. Tt OPERATING MECHANISM (Figs. 5§ ond 6} . Function 1. The operating mechanic circuit-breaker contacts by 3. ring the The breaker Afi:‘ the handle 45 direction. Handle nig or tripping.
COMPONENTS AND ATTACHMENTS ¢. Anti-Bounce Latch. The anti-bounce latch ‘234", prevents the breaker from bouncing closed when interrupting short-circuit current. As the breaker opens, pin ‘238 strikes latch ‘234", pivoted on pin ‘237", rotating the latch until its hook is in position to hold pin ‘238" from bouncing to the closed position. d. Position Indicator.
COMPONENTS AND ATTACHMENTS moving core ‘342", an operating rod ‘343’, a stationary core *341°, and a coil ‘347", The operating rod ‘343’, connects the moving core ‘342, to a pin ‘227', Fig. 6, on the operating mechanism. It will be observed in Fig. 6 that an upward movement of this pin will cause the mechanism to close and Janette the circuit breaker. When the coil 347" of the closing magnet is energized by the relay 300, Fig.
AIR CIRCUIT BREAKER the relay coil may be inadvertently energized when the circuit breaker is latched, the relay contacts will not close, and current will not flow through the circuit-breaker closing coil. The moving contacts, ‘303°, Fig. 8, are resilient-mounted by means of springs, ‘314", around studs set into the moving contact arm ‘301°, and are secured by elastic stop nuts ‘815°.
COMPONENTS AND ATTACHMENTS 307 335 ) (328) (338 336 339 301 /@ z e 316 329 322 40" TRAVEL OF d TRP FINGER [ 312 as) A/ FRONT VIEW 323 324 a4 ) (303) (a3 Y304) (302 a08) (33 326 { 325 300, RELAY BASE 315, 19022 X 3/8 SCREW 301. MOVING CONT. ARM SAYS. 320. .190 X 1/4 BINDING HD. 3CR. 302. BLOWOUT MAGNET SAYS. 321. .164-32 X 3/8 PAN HD. SCR. 303, MOVING CONT. SAYS. 3220 164:32 X 3/4 PAN HD. SCR. 304, STAT. CONT. SAYS. R.H. 323 19032 X 1 3/8 PAN HD. SCR. 305 FRAME 324] 190 STD. WASHER 306, STAT. CORE 325.
COMPONENTS AND ATTACHMENTS 5. To replace the moving contact-arm spring ‘312" (a) Remove the snap ring from one end of the contact-arm pin ‘329’ and push pin out. (b) Remove the moving contact-arm assembly ‘301" and replace the spring ‘312’, 6. To replace the moving contact ‘303", or contact spring ‘314': (a) Remove the elastic stop nut ‘315, and replace the spring (if necessary).
AIR CIRCUIT BREAKER CURRENT IN AMPERES 3s8% B8 1006 900 800 400 00 800 1000 2000 4000 6000 8000 400 300 200 100 GENERATE BREAKER ANODIZES NI WL WESTINGHOUSE TYPE DBN—605 AR CIRCUIT BREAKERS TIME IN SECONDS 40 CIRCUIT BREAKER SETTINGS S.1.D, CR. BKR LYLY. PICKUP BAND INST. 20 GENERATOR NONE 5400 A. 3 10,000 TIME IN CYCLES SIDED NI WILL SCALE X 10 = CURRENT IN AMPERES 900 3000 5000 7000| 9000 FI6. 10 — Over current Tripping Curves (Reference Curve 351881) 2.
AIR CIRCUIT BREAKER rude than the instantaneous-pickup setting, the instantaneous spring ‘4207 extends, and the tube assembly ‘440, rises and trips the circuit breaker instantaneously, unimpeded by the mechanical escapement device. ¢. Replacements NOTE: Any field replacements on the over current-trip device should be regarded as temporary, pending re calibration at the factory. 1.
COMPONENTS AND ATTACHMENTS voltage-trip lever to raise the trip bar and open the breaker. c. Replacements 1. To replace voltage coil ‘801': {a) Remove under voltage-trip device from breaker by disconnecting the coil leads and removing the two 33 mounting bolts. (b} Remove bracket ‘821", by removing screws ‘829 and ‘830°, and pin ‘831" (c) Remove rear cover ‘820°, by removing the two mounting screws. Moving core ‘804", and tube ‘802", can now be removed.
AIR CIRCUIT BREAKER 151 | PLATFORM 810 | BUSHING 822 | WHEEL. ASSES. 168 | CROSSBAR *811 | SPRING, TRIP 823 | TICKER ASSES, 800 | FRAME *812 | SPRING, RESET LEVER 824 | LEVER *801 | coll B13 | SPRING GUIDE 825 | Cover 802 | Tu Be *B14 | SPRING, ANTI SHOCK 826 | rOD 803 | STATIONARY CORE 815 | RESET LEVER 827 | RESET LEVER PIN 804 | MOVING CORE 816 | PLUNGER 828 | PAN HEAD SCREW B80S | LATCH 817 | WASHER B28 | FLAT WD. SCREW BOG | SPACER B18 | NAME PLATE 830 | FIL. HD.
COMPONENTS AND ATTACHMENTS (2} Remove nameplate, screw ‘613°, and screw ‘611" {b) Loosen screws ‘627", tilt yoke ‘600°, away from cal, and pull roil ‘623", off hiss on pole piece ‘601" and replace. 4. To replace latch reset spring ‘637°: (a) Remove coil *623', as above. (b) Remove pin ‘636", and replace spring ‘637", 5.
AIR CIRCUIT BREAKER 100[MOLDED BASE 617 PIN E3e] P18 518 spacer %6371 SPRING, ROD RESET 600 YOKE 5190 PIN 6381 ADJUSTING SCREW 601 |POLE SIEGE 620 Pin 539] LOOKOUT €02/ BEARING CASTING 621 PIN 640 FILTER 603] ARMATURE 622, PIN 641, 19G ~32 FL. HD. MACH. SCREW 504 |Lug 623 COIL, POTENTIAL 6821 '-13 X2k HEX STL BOLT 505 Y Rip LEVER eaA‘ COIL, SERIES 93] 1513 x 1 \hostler BOLT 1606 LEEK 825 TUBE 644 Y-16X | HEX BOLT'S 607|8aND 626 WASHER 645] ADJUSTING SCREW 608| arm 627 FLAT HD SCREW 546] CONNECTOR 1609]LOCKI
AIR CIRCUIT BREAKER CERTIFICATION DATA FOR CIRCUIT BREAKERS A MASTER DRAWING _SG202-3 102,132 = REVISION <= B. MFRS DRAWING NO. _ —_ Revision _I3 WIRING DIAGRAM _SHEET . D APPLICABLE SPECIFICATION MiL_ _ ANC AMENDMENTS _ * € NAY CONTRACT OR SHIPBUILDERS ORDER NO. NOkS73085 £ MFR'S ORDER NO. .. Se£ SHEET [ NFL'S. DB-005 H. DESCRIPTION OF CIRCUIT BREAKER VOLTAGE _210Dc_ NO, OF POLES Z . . _NO. OF OVER CURRENT COIL'S CONNECTIONS BACK __ MOUNTING DEAD FRONT AUXILIARY SWITCH CIRCUITS _ 4 (AVI) ske 0.7 1.
CERTIFICATION DATA REPAIR PARTS List S IDENTIFICATION 2 (5585 wane oF part | WEST STANDARD el STYLE |WT|DRAWING | NAVY STOCK ~ eulogy NO. [LB| SPRING ROLLER LATH 1584519 | 01| 8D 205 ;0720 SPRING PAWL 1581956 8D 3981175 20 5 072/ 3 (36 | AUXILIARY SWITCH 1581858 |.
AR CIRCUIT BREAKER REPAIR BRATS LIST 9 IDENTIFICATION 3 S| Name oF part | _WESTINGHOUSE. | ~STANDARD 8 See STYLE [WT|DRAWING | NAVY STOCK NoO. NO. 5111 | '] SPRING ROLLER LATCH 1584513 [.01] 8D 3381|5205 /0720 5217 | ' | SPRING PAWL 158/956 1.03] 8D 398\ |P5 20-5 1072/ 5319 1 2 | AUXILIARY SWITCH 1581358 1.9 [14A 3835 [ a1/ Wi /983 SPRING ACCELERATING 1584408 (0310 «383]| P25 20-510722 55|% | 8] SPRING -MAIN CONTACT 1564469 &383|F5 20-5/0723 5G4 1 4| SPRING -BRIDGE 1584470 | .
