Westinghouse ACB-1600HR, Technical Manual

Page 1: ...3B NAVY TYPE ACB 1600HR CIRCUIT BREAKER WESTINGHOUSE TYPE DBN 1016 BEMOVABLE ASSEMBLY 1600 AMPEBE FBAME SIZE STANDABDIZED DIMENSIONS WESTINGHOUSE ELECTRIC CORPORATION EAST PITTSBURGH PA U S A TECHNICAL MANUAL 32 855 3Cl BUREAU OF SHIPS NAVY DEPARTMENT FEBRUARY 1960 ...

Page 2: ...e and stress to the studs and the insu lated moldings Any discoloration or pitting of the circuit breaker contacts in evidence when the circuit breaker is received from the manufacturer is caused by calibrating the breaker and will in no way interfere with proper functioning of the circuit breaker MAINTENANCE Periodic inspection of the breaker is rec ommended An inspection should always be made af...

Page 3: ...evice Anti SOOck Close Device Anti SOOck Open Device Series Overcurrent Trip Unit Auxiliary Switch Main Disconnects Secondary Disconnects Indicator Lights Silicon Rectifier Cell Interlock Extension Rails CHAPTER 2 PmNCIPLES OF OPERATION SECTION 1 GENERAL PmNCIPLES GENERAL Description Closing Tripping Electrical Operation CHAPTER 3 OPERATING INSTRUCTIONS SECTION 1 PRECAUTIONS SAFETY PRECAUTIONS Pag...

Page 4: ...ck Clcrse Device Anti Shock Open Device Overcurrent Trip Device Auxiliary Switch Main Disconnects Secondary Contacts Indicator Lights Silicon Rectifier Drawout Interlock Extension Rails CHAPTER 6 REPAIR PARTS LIST SECTION 1 REPAIR PARTS LIST INTRODUCTION PARTS IDENTIFICATION Circuit Breaker Repair Part Ordering SECTION 2 REPAIR PARTS TABULATION REPAIR PARTS TABULATION Repair Parts CHAPTER 7 DRAWIN...

Page 5: ...y Trip Assembly Shunt Trip Device Anti Shock Close Device Anti Shock Open Device Typical Time Current Curves Overcurrent Trip Device Auxiliary Switch Main and Secondary Disconnects Indicator Light Silicon Rectifier CHAPTER 2 PRlNCIPLES OF OPERATION SECTION 1 GENERAL PRlNCIPLES 2 1 1 Wiring Diagram 2 1 2 Schematic Symbols CHAPTER 5 MAlNTENANCE SECTION 2 CORRECTIVE MAlNTENANCE 5 2 1 Relay Contact Ad...

Page 6: ...APTER 1 GENERAL INFORMATION SECTION 0 GENERAL DATA 1 0 1 Circuit Breaker Classification Data 1 0 2 Current Rating of Components 1 0 3 Voltage Rating of Components 1 0 4 Auxiliary Switch LIST OF TABLES Page 1 1 1 1 1 2 1 2 vii ...

Page 7: ...R W E Corp Type DBN1016 1600 Amperes 500 Volts A C 60 Cycles 3 800 1000 1200 1400 1600 Amperes 100 000 RMS Amperes 100 000 RMS Amperes 30 Cycles Electrical and Emergency Manual 8 Removable Assembly Dead Front Back B Class III 500 C Overcurrent Long Delay Tripping Short Delay Tripping Bands 1 2 3 Instantaneous Tripping Shunt Trip Westinghouse il900J232 2 sheets 5419 31 of 20 March 1959 560 Ibs 440 ...

Page 8: ...t breaker is a complete removable assembly for installation within a switchboard cubicle The circuit breaker is designed as an as sembly including the drawout mechanism These assemblies incorporate disconnect features for both main current connections and secondary current connections This mounting allows easy 2 removal and installation of the movable compo nent when maintenance operations are req...

Page 9: ...IARY l CHAPTER I GENERAL INFORMATION RECTIFIER MAIN STATIONARY I T BOLTS INDICATOR LIGHT EXTENSION RAILS STATIONARY COMPONENT OPERATING HANDLE FICURE 1 Removable A embly and Stationary Component CROSSBAR 1 3 ...

Page 10: ...CIRCUIT BREAKER 1 4 ARC CHUTE FACE PLATE MAIN SECONDARY DISC ON N ECTS ANTI SHOCK OUT OPERATING MECHANISM EXTENSION RAIL RELEASE HOLE CAM ROLLER ROLL OUT WHEELS F GURE 1 1 2 Movable Component ...

Page 11: ... Pol Unit s Figure 1 2 2 Three separate pole units are bolted to the front of the steel panel one for each of the three phases Each pole unit consists of a base a stationary contact assembly and a moving contact assembly The base is molded from Navy Type MAI 60 insulating material and iso lates the stationary and moving contacts from the chassis The stationary contact assembly consists of the main...

Page 12: ...41 118 119 STATIONARY ARCING CONTACT CENTER ARC CHUTE PLATE TUBE SPACER SCREW MOVING ARCING CONTACT REPAIR PARTS 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 LOCK CLIP BOLT MOVING CONTACT ARM MAIN MOVING CONTACT LOCK PlATE TURNBUCKLE INSULATING LINK SPRING ACCELERATING AUXILIARY CONTACT HINGE PIN SPRING AUXILIARY CONTACT NUT SCREW MAIN CONTACT FINGER PRES...

Page 13: ...n where it is quickly de ionized and extinguished CHAPTER l GENERAl INFORMATION 1 2 1 5 Operating Mechanilm S Figure 1 2 3 The operating mechanism opens and closes the circuit breaker by moving the cross bar lS7 Figure 1 2 1 to which the moving con tact assemblies are attached It is mounted on the top of the shell at the center of the cir cuit breaker The operating mechanism consists of a group of...

Page 14: ...CLOSING LEVER ROLLER LATCH LINK PIN PIN THIRD TOGGLE LINK PAWL SECOND TOGGLE LINK INDICATOR LINK SPRING PAWL 150 REPAIR PARTS provides a positive visual indication of the op erating condition of the circuit breaker 1 2_1 6 Closing Rolay See Figure 1 2 4 The closing relay is used on electrically operated breaker only and is mounted on the left side of the closing solenoid This relay closes and open...

Page 15: ...e stationary con tacts 237 The main moving contacts 236 are fas tened to the contact arm 234 which is molded CHAPTER l GENERAL INFORMATION from insulating material Silver alloy contact tips are brazed on the contact legs The main stationary contacts are made from spring material and are u shaped They are secured to the base by screws 240 The U shape arrangement causes a slight rolling and wiping a...

Page 16: ... CIRCUIT BREAKER 1 10 232 235 236 2 1l 241 239 242 212 210 226 203 204 203 SECTION AA 201 200 FIGURE 1 2 4 Clo in Relay ...

Page 17: ...e Link 229 Latch 230 Pin 231 Pin 232 Pin 233 Movable Contact Screw 234 Movable Contact Arm 235 Contact Arm Spring 236 Movable Contact 237 Stationary Contact 238 Base 239 Cover Screw 240 Stationary Contact Screw 241 Main Circuit Terminal 242 Magneti c Core 243 Spring Auxi liary Contact FIGURE 1 2 4 Closing Relay 252 251 _ 0 A V t I V 1 I i _______ l 1 _ 1 A A O _ j __ 1 I 10 I I 1 LEGEND 246 245 24...

Page 18: ...ving core moves into the breaker closed or closed gap position trip bracket 257 engages tbe first trip lever 255 of the relay trip assembly As tbe first trip lever 255 is forced upward increased tension on spring 254 rotates second trip lever 253 which engages the relay trip pin 201 Figure 1 2 4 of tbe closing relay to trip the relay the relay contacts open de en ergizing the closing solenoid Tbe ...

Page 19: ...l GENERAL INFORMATION the shunt trip coil through a normally open auxiliary switch contact Spring 267 then re turns the moving core 265 to its normal po sition Non magnetic washer 270 prevents residual magnetism from holding the cores to gether when the coil is de energized 1 2 1 9 Anti Shock Clo Dev ce S Figure 1 2 7 The anti shock close device 280 is mounted on the side of the operating mecha ni...

Page 20: ...ATING MASS GEAR SPRING WEIGHT GEAR LEVER FRAME The anti shock open device consists Qf a frame 294 cover 296 weight 297 lever 293 spring clip 298 lever spring 299 weight spring 291 and a gear train The gear train is composed of two torque reducing gears 290 and 292 and a round unit of rotating mass 289 Under shock conditions the weight 297 is rotated about pin 295 As the weight ro tates it forces t...

Page 21: ...CHAPTER l GENERAL INFORMATION CURRENT IN PERCENT OF COIL RATING 7 CURRENT IN PERCENT OF COIL RATING FIGURE 1 2 9 Typical Time CUTrent Curves 1 15 ...

Page 22: ... T 3467 5 34S 344 341 33S 346 SHORT DELAY TRIP 321 342 FRONT VIEW 1 16 329 INSTANTANEOUS TRIP 324 34B BREAKER CLOSED CONTACT ARM BREAKER CLOSED CONTACT ARM BREAKER OPEN DISCRIMINATOR TRIP FIGURE 1 2 10 Overcurrent Trip Device ...

Page 23: ... and in stantaneous pickup are all fa c tor y set and sealed The pickup currents and time delay are marked on scaleplate Figure 1 2 9 shows a typical Time Cur rent Curve The upper line of a given band shows the MAXIMUM TIME for breaker to clear the circuit for any given overcurrent The lower line shows the MINIMUM time an overcurrent can exist before returning to nor mal without tripping breaker T...

Page 24: ...ill rotate lever 359 away from latch 356 Spring 357 places latch 356 into position to engage crank projection D Piston 360 and cylinder 362 create a small time de lay so that latch 356 will not rotate on clos ing stroke of breaker until breaker is com pletely closed If On the closing stroke a fault 1 18 current of 40 000 amperes or more appear then armature 330 will carry latch 356 with it and rot...

Page 25: ...REW SHAFT CONTACT FINGER CONTACT SPRING STEM COLLAR MACHINE SCREW COVER TERMINAL SCREW IZl T 2l 0 l I 11 LEGEND REPAIR PARTS 41 411 412 413 414 415 416 417 418 419 420 421 422 ARM SPACER CASE SECTION 88 420 421 t J ROTOR END ROTOR SECTION ROTOR END 8USHING MACHINE SCREW CONNECTION LINK MACHINE 80LT TERMINAL BLOCK FIGURE 1 2 11 Auxiliary Switch 1 19 ...

Page 26: ...gure 1 2 12 The secondary disconnects consist of two assemblies the moving assembly which is mounted on the breaker panel and the stationary assembly which is mounted within the stationary component The secondary contacts provide a means of connecting the breaker control cir cuit to the bus 1 20 The moving assembly consists of a base 434 on which are mounted four separate but identical contacts Ea...

Page 27: ... Each consists of case 451 and cover 452 which encloses eight rectifier elements 453 The rectifier units are wired in a bridge type arrangement as shown in Figure 1 2 14 CHAPTER l GENERAL INFORMATION BLOCK DIAGRAM SCHEMATIC DIAGRAM 450 V 60 450 V 60 4 l t ___I 1 C JI 451 LEGEND 450 SILICON RECTIFIER 451 CASE 452 COVER 453 RECTIFIER ELEMENT 454 MOUNTING SCREWS REPAIR PARTS FIGURE 1 2 14 Silicon Rec...

Page 28: ...ry disconnect contacts The rails permit racking out of the mov able component to a position where it is pos 1 22 sible to inspect the main and secondary dis connects within the switchboard without remov ing the movable component If the operator releases a movable compo nent that is being drawn out the free roll of the movable component will be limited to about one inch by the extension rail releas...

Page 29: ...ded for test pur poses or for emergency use The moving contacts make or break a main circuit by moving in or out from the stationary contacts The contacts are quick break under all conditions of operation Arc chutes are in stalled to split lengthen cool and extinguish the arc that is drawn when the contacts open The circuit breaker is mechanically trip free that is the tripping mechanism can trip ...

Page 30: ...J J11 D n i yO f L I HH T rT I I I I I I I J 1 1 1 I I If CONT I INDk ATlfIN _ ou_ _u ___ 1 5tJVIC y fr NOT SUPPLIED WITH CIRCUIT BREAKER 5 4 4S0 VOLTS X CYCLES 5 y 2 2 7 8 yr HDICAT LI HTS FIGURE 2 1 Wiring Diagram r AUXILIARV SWITCH S ...

Page 31: ...sed the closing relay is actuated which closes contacts xa to energize the clos ing solenoid The closing solenoid closes the breaker as described in Chapter 1 Section 2 When the breaker is closed the normally open circuit breaker contact an closes to set up the shunt trip circuit Closing the circuit breaker trip switch CST energizes the trip coil to trip the circuit breaker as described in Chap te...

Page 32: ...ny maintenance operation unless breaker is open and in a withdrawn po sition b Never use kerosene gasoline or other com bustible solvents to clean the circuit breaker as their use is dangerous and may result in an ex plosion c Never clean or dress contacts with emery cloth since the abrasive dust is a good con ductor and may cause trouble if allowed to set tle on insulating surfaces Rough or high ...

Page 33: ...wiring connec tions to the stationary secondary disconnect fingers e Connect the switchboard bus work to the primary breaker studs follOwing Navy accepted practices 4 1 1 3 To install the movable component into the stationary component a Turn the knurled screw that secures the rail extension assembly in a vertical position counterclockwise until the threads are fully dis engaged and lower the rail...

Page 34: ...movable component is trip free and cannot be closed either electrically or manually until it is pulled forward so the cell interlock on the 4 2 right side of the moving component engages in one of the notches on the lower edge of the right hand rail extension 4 1 1 5 To insert the movable component fol low the instructions in paragraph 4 1 1 4 part d f and g 4 1 1 6 To install replacement movable ...

Page 35: ... circuit breaker The chassis will require no maintenance other than keeping it clean free of dirt dust and other foreign matter 5 2 1 3 Pole Unit 5ee Figure 1 2 2 Refer to Paragraph 1 2 1 3 for description and operation of the pole units The correct contact pressure ofthe DBN 1016 circuit breaker is obtained when the main contact fingers 135 and 137 are defected 0 005 when the breaker closes A con...

Page 36: ... free of foreign matter When inspection shows that the plates of the arc chute are badly burned it should be replaced 5 2 To replace the arc chute remove screws 119 and lift arc chute free of breaker Place new arc chute in plsition and replace screw 119 5 2 1 5 Operating Mechanism 5ee Figure 1 2 3 Refer to Paragraph 1 2 1 5 for description and operation of the operating mechanism The only maintena...

Page 37: ...making sure latch 229 slides over pin 230 Reassemble in reverse order to disas sembly instructions CHAPTER 5 MAINTENANCE To replace a trip spring 221 remove ring from the end of the trip crank pin 222 Push out trip crank pin with soft rod and lift out trip spring Reassemble in reverse order to dis assembly procedure To replace m 0 v i n g contact arm spring 235 remove arcing chamber retaining stri...

Page 38: ...in 263 washer 270 and sleeve 266 Lift out coil 268 Reassemble the shunt trip device with new or serviceable coil in reverse order to d1sassembly procedure To replace a defective or broken reset spring 267 follow above disassembly instruc tions until spring is re moved Replace spring and reassemble in reverse order to disassembly instructions 5 2 1 9 Anti Shack Cla e Oevice S Figure 1 2 7 Refer to ...

Page 39: ... Lift the rotor assembly out of case Pull the rotor apart slightly at the contact to be changed to disen gage positioning lugs Rotate the contact 90 degrees clockwise to convert a normally open CHAPTER 5 MAINTENANCE contact to a normally closed contact when affected contact is in the lower switch and counterclockwise to convert a normally open contact to a normally closed contact when the affected...

Page 40: ... replaced To replace a rectifier first remove the front cover 452 of each case by removing the screws Tag and disconnect the incoming leads Remove the screws 454 securing the rectifier 5 6 to the mounting plate on the closing solenoid To install the replacement rectifier use the re verse of the removal procedure 5 2 1 17 Drawout Interlock Referto Paragraph 1 2 1 17 for description and operation of...

Page 41: ...arts for a specific installation 6 1 1 2 Repair Part Ordering When ordering a part not identified by manufacturer s part number be sure to state S_O Shop Order number that appears on front of breaker platform on Breaker Identification Plate Section 2 Repair Parts Tabulation 6 2 1 REPAIR PARTS TABULATION 6 2 1 1 Repair Parts See Paragraph 6 1 1 1 for explanation of the following tabulation IDENTIFI...

Page 42: ... 2 6 267 Spring Reset 1802869 1 1 2 6 268 Coil 1 1 2 7 280 Anti Shock Close Device _ 0 1 2 7 285 Spring Return 126A172H01 1 1 2 8 288 Anti Shock Open Device 0 1 2 8 291 Spring Weight 126A804H01 1 1 2 8 299 Spring Lever 126A604H02 1 1 2 10 310 Overcurrent Trip Unit _ 0 1 2 10 317 Spring Limit 1 1 2 10 319 Spring LD Pickup 1 1 2 10 322 Spring LD Dial 1 1 2 10 331 Spring Instantaneous 1 1 2 10 339 Sp...

Page 43: ...NGS Section l General Figure 7 1 1 Air Circuit Breaker Removable Assembly Westinghouse Drawing 900 J 232 Sheet 1 Page 7 3 7 4 Figure 7 1 2 Air Circuit Breaker Stationary Components Westinghouse Drawing 900 J 232 Sheet 2 Page 7 5 7 6 7 1 ...

Page 44: ...AL NAVSHIPS 362 2191 THE NAVY DESIGNATIONS FOR THESE BREAKERS ARE ACB 3200HR AND ACB 4000HR Technical Manaallnsel t fo NAVSHIPS 362 2189 WESTINGHOUSE T M 32 855 3Cl ADDITIONAL MAINTENANCE INSTRUCTIONS fo NAVY TYPE ACB 1600HR CIRCUIT BREAKER WESTINGHOUSE TYPE DBN IOI6 WESTINGHOUSE ELECTRIC CORPORATION EAST PITTSBURGH PA U S A TECHNICAL MANUAL 32 855 11Cl BUREAU OF SHIPS NAVY DEPARTMENT NOVEMBER 196...

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Page 46: ...to help the personnel involved locate the trouble when the failurE S occur infrequently a If personnel suspects that breaker relay was not energized that is no cliCk ing sound from relay then look for 1 Open interlock switch or exter nal relay not functioning 2 Loss of control power b If personnel suspects breaker relay was energized but that closing solenoid was not energized look for 1 Relay def...

Page 47: ... PAWL 164 Figure 1 2 3 from latching under Pin 177 6 Premature de energization of relay coil due to external interlocks and relays 4 There is no set dimension or adjust ment of cell interlock trip Figure 1 2 1 The gap between lever unit 143 and trip bar 148 is adjusted betweenthese limits a The gap must be small enough to in sure that depressing lever handle 144 will trip breaker before extension ...