www. ElectricalPartManuals. com POWER CIRCUIT BREAKERS TYPES AK-2/3/2A/3A-50, AKU-2/3/2A/3A-50, AKT-2/3/2A/3A-50 GENERAL fj ELECTRIC

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1 ORDERNG NSTRUCTONS. Always specify complete nameplate data of the breaker. 2. Specify the quantity, catalog number (if listed), reference number (if listed), description, and this bulletin number. 3. Standard hardware such as screws, bolts, nuts, washers, etc., is not listed in this bulletin. Such items should be purchased locally. 4. For prices, refer to the nearest office of the General Electric Company. GEF450H RENEWA PARTS Supersedes GEF450G POWER CRCUT BREAKERS Manual breaker, Type AK250 TYPES AK2/3/2A/3A50, AKU2/3/2A/3A50, AKT2/3/2A/3A50 (PHOTO l GENERA fj EECTRC

2 TYPE AK POWER CRCUT BREAKERS ' C) 22 ' Fig.. 2 Pole unit, ' /, ( OWG )

3 TYPE AK POWER CRCUT BREAKERS.... No. Required per Pol l FiJ Ref. '""' p:k=2:50 AK2A50 AK0 AK3A50 No.[ No.. Man. Elec:. Man. Elec. Man. Ele_c. Man. 2 t 2 t t t t t *4 *4 *4 *4 *5 *5 * * * * *2 2 *3 * 4 l 2 * ! l [ ' 37A208P P 449A994P3 7A52P 452A542P 295B408G 295B408G 295B408G3 295B408G P P Pl Pl 44704P 44704P P P2 433A39P2 433A39P 459A373P3 459A373P G G2 293B22G 459A385G 293B220G7 293B220G4 452A528Pl P P P 394A33P9 275B975P 275B975P 44774P 20398P 394A33P0 457A24G 457A24G2 452A59G2 452A529P 4434P2 452A54G 20398P9 293B287P P3 453AlP 453AlP2 453AP P 42A0287P 293B240G 293B240G2 449A995P P2 238D74G 238D74G2 t To determine quantity required per breaker multiply by number of poles (2, 3 or 4). t Original breaker had no suffix letter or numeral. * Recommended for stock for normal maintenance. Description Spacer Stop. AK50 AC Stop. AK50 DC, AKU50, AKT50 Block, AK50 AC Block, AK50 DC, AKU50, AKT50 Stationary arcing contact, AK50 AC Stationary arcing contact, AK50 DC, AKU50, AKT50 Stationary arcing contact, AK50 AC Stationary arcing contact, AK50 DC, AKU50, AKT50 Spring for stationary arcing contacts, (outer) AK50 AC Spring for stationary arcing contacts, (outer) AK50 DC, AKU50, AKT50 Spring for stationary arcing contacts, (inner) AK50 AC Spring for stationary arcing contacts, (inner) AK50 DC, AKU50, AKT50 Spring guide for stationary arcing contact springs, AK50 AC Spring guide for stationary arcing contact springs, AK50 DC, AKU50, AKT50 Pivot pin for stationary arcing contacts, AK50 AC Pivot pin for stationary arcing contacts, AK50 DC, AKU50, AKT50 eaf spring for stationary arcing contacts, AK50 AC eaf spring for stationary arcing contacts, AK50 DC, AKU50, AKT50 nsulation for stationary arcing contacts, AK50 AC nsulation for stationary arcing contacts, AK 50 DC, AKU 50, AKT 50 Moving arcing contact, AK 50 AC Moving arcing contact, AK 50 DC, AKU 50, AKT 50 Stationary main contact Stationary intermediate contact (includes barrier) Moving main conta cls Moving intermediate contact Pin for movable main contact ink for movable main contact Pin for movable arcing contact link, AK50 AC Pin for movable arcing contact link, AK50 DC, AKU50, AKT50 Retainer ink for movable arcing contact, AK50 AC ink for movable arcing contact, AK50 DC, nsulating tube Pin for side link Retainer Side link, right Side link, left Terminal AKU50, AKT50 eaf spring for movable main contacts Pole unit base ower stud Pivot pin for movable main contacts Spacer for terminal Pivot pin for movable arcing contact Stop for stationary main contacts Spacer for stationary main contact stop Spacer for stationary main contact stop Spring for stationary main contacts Spring for stationary main contacts Upper stud, AK50 AC Upper stud, AK 50 DC, AKU50, AKT50 eaf spring for stationary main contacts Pivot pin for stationary main contacts Arc quencher, AK50 AC Arc quencher, AK50 DC, AKU50, AKT50 3

4 Fig. 4. AK250 manual TYPE AK POWER CRCUT BREAKERS Fig. 2. Back frame assembly Fig. 3. Arc quencher (Ref. No. 38 ) 57 Fig. 5. AK250 electrical

5 TYPE AK POWER CRCUT BREAKERS No. Re uired p_er Pole t Fig. Ref. AK 2 50 AK 2A 50 AK 3 50 AK 3A 50 No. No. Man. Elec. Man. Elec. Man. Elec Man Elec t 2 t 2 t t t t t t * Pl A275Gl A275G A275G A275G Pl P P B0P Pl Pl Pl P D0807P C997P B997P2 * B975P * 58 98C997P5 * B975P A904G5 * 0 42A P3 * 2 92A957P B250P V53P A493P2 8 27B250P2 * A33Pl * A953P4 4 * A33P 74 74V53P A33P0 t To determme quantity reqmred per breaker multply by number of poles (2 or 3}. * Not shown. t Original breaker had no suffix letter or numeral. FG. NO. 5, REF. NO. 52 GEAR BOXES Phase barrier Description ifting bracket, right (pearl gray} ifting bracket, right (sand gray} ifting bracket, left (pearl gray} ifting bracket, left (sand gray} Arc quencher tie bar (pearl gray} Arc quencher tie bar (sand gray} Arc quencher tie bar Cross bar Opening spring, AC (not used on AKU or AKT} Opening spring, AC (AKU or AKT} Opening spring, DC Handle (black} Handle (gray} Front escutcheon (black} Front escutcheon (w/o closing switch, black} Front escutcheon (with closing switch black} Front escutcheon (blue} Front escutcheon (blue} Trip button and rod assembly Trip button spring Hand, trip paddle Clamp Trip shaft (outside} Coupling Dowel pin Trip shaft (center} Retainer Trip shaft bearing (side sheets and mechanism frame} Retainer Pin Retainer 773 and 7732 gear boxes are no longer manufactured for AK 50, 75, 00 breakers. A modification of the AKR design electrical closing assembly is available to replace these units. The replacement unit will include a new closing motor. Select replacement for 753G or G2 gear box from Column. Replacements for 7732G2 should be selected from Columns to 4, for G3 select from Columns 5 to 8. REPACEMENT KT C A T. NO (Select Group Number Below Conventional Close Type Quick Close Type Column AK 50, 75, 00 AK 2A 50 AKT 2A 50 AK 2A75, 00 AK 250, 75,00 AK2A50 AKT2A50 AK 2A 75, 00 Volts Hertz AK 2 50, 75,00 AK3A 50 AKT3A50 AK 3A75, 00 AK 3 50, 75, 00 AK 3A50 AKT 3A50 AK 3A75, 00 AK 35Q, 75, 00 ncludes AKU ncludes AKU ncludes AKU ncludes AKU ;: 48 DC G37 G49 G G37 G28 G49 G 25 DC G38 G50 G2 G38 G29 G50 G2 250 DC G39 G5 G3 G39 G30 G5 G G40 G52 G4 G40 G3 G52 G G44 G5 G8 G44 G34 G5 G G43 G55 G7 G43 G34 G55 G G4 G53 G5 G4 G32 G53 G G4 G58 G70 G4 G35 G58 G G45 G57 G9 G45 G35 G57 G9 G37 G38 G39 G40 G44 G43 G4 G4 G45 5

6 Fig No. * * Fig.. AK250 mechanism assembly TYPE AK POWER CRCUT BREAKERS No. Reuiredg_er Ereaker Ref. AK2 50 AK2A50 AK350 No. Man. Elec. Man. Elec. Man. Elec. t 2 t * Not shown. t Original breaker had no suffix letter or numeral AK 3A 50 Man. Elec A40P 09 49A3P 44743P 55544P2 42A43P3 42A405P P 457A0G 4449P 4474P Fig. 7. Spring Prop Cam AK250 manual front frame assembly Coupling Clevis Pin Pin Reset latch atch bolt atch P Spring 98C993G 377A87P2 394A33P9 457A22G P 44709P 44733P 48A223Pl 48A224Pl P 20394G 457A27G 383A7G2 4033P 848C0487P 889B040G 42A42P2 29C27G5 Prop Description Prop shaft bearing Retainer ink assembly Pin Pin Spring guide (upper) Spring reset (inner) Spring reset (outer) Spring guide (lower) Spring support assembly Buffer assembly Counter weight Trip shaft return spring atch Reset latch Prop stop Trip paddle

7 Fig. 8. AK250 electrical front frame assembly TYPE AK POWER CRCUT BREAKERS No. Required per Breaker Fig. Ref. AK 250 AK2A50 AK 350 AK3A50 No. No. Man. Elec. Man. Elec. Man. Elec. Man. Elec. t 2 t 2 t t t t * 7 2 ' * * 22 * i , 0 42 * Not shown. t Original breaker had no suffix letter or numeral. t t Fig. 9. AK250 manual closing mechanism 44777P 48A94P P 48A94P 394A33P4 98C99G5 98C99G4 98C99P P P 98C993P4 98C993P3 98C993P5 393A993P24 889B0408G 273B59G9 98C992G5 98C992G4 393A554P 393A79P3 98C987G2 98C988G3 98C990G2 394A37P2 27A830P 394A33P28 98C985G 98C985G2 84C87G 98C99G5 394A33P3 42A280 P 98C99P0 98C99G Trip shaft stop Description Spacer Upper spring guide assembly pin Spacer Retaining ring Pawl spring support (upper) Pawl spring support (lower) Pawl spring rollers ower spring guide assembly pin ower spring guide assembly pin Buffer pin Buffer support Buffer washer Buffer stop nut Spring guide assembly (closing) Spring guide assembly (closing) Support (includes bearing less outer rae Crank (includes outer race of bearing) Support Bearing Ratchet assembly Support assembly Shaft assembly Roll pin Spring Retainer Pawl with spring (rear) Pawl with spring (front) Spring arm Prop Retainer Prop spring Pin ndicator (when ordering indicator include label ref. No. 5) 7 e)

8 OWG 848C483) 47 Fig. 0. AK250 manual indicator assembly TYPE AK POWER CRCUT BREAKERS No. Required per Breaker Fig. Ref. AK250 AK2A50 AK3A50 No. No. Man. Elec. Man. Elec. Man. Elec. Man. Elec. AK350 Fig.. t 2 t 2 t t t t t t '+' 55 (OWG 242C9 5 Section of gear box A37Pll C995P A493P C995P A27P C995G A0292Pl C995G C08P P A992P P 5 372A383P * A99P P 5 58A P PMAA PMA7A A753P8 2 92A9792Pl A753P A235P A233G A234G 2 394A33P9 * Not shown. t Original breaker had no suffix letter or numeral. 8 Roll Pin Bearing 73 =4 5 7 Fig. 2. Motor cutoff switch Description Rod Tube Spring ndicator lever assembly Spring ndicator crank assembly Openclose label Plug "0" ring for plug Spring for ratchet pin Ratchet pin ubricant for gear box ( 4 oz.) Gasket motor Gasket, gea r box end plate Motor, 5 volts, 25, 50, 0 cycles and 25 volt DC Motor, volts, 25, 50, 0 cycles and 250 volt DC Cut off switch "G" Cut off switch insulation Cut off switch "F" Cut off switch cover Cut off switch mounting bracket Cut off switch lever bracket Cut off switch retainer

9 Fig. Ref. No. 3 4 No. t Fig. 3. Shunt trip (Ref. No. 70) TYPE AK POWER CRCUT BREAKER 9 No. Required per Pole t AK 2 50 AK2A50 AK 3 50 AK 3A 50 Man. Elec. Man. Elec. Man. Elec. Man. Elec. 2 t 2 t t t t t t Fig. 4. Time delay undervoltage device (Ref. No. 73) Description A8404P4 Cut off switch spacer 5 8 See Table "B" Closing relay (X} standard 5 8A See Table "B" Closing relay (X} quick close * 8B See Table "B" Anti pump relay (W} quick close * 8C See Table "B" Closing solenoid quick close A537P Shunt trip device support 70 See Table "A" Shunt trip device (with coil) 3 7 See Table "A" Shunt trip coil * A380P Undervoltage device support 73 Time delay undervoltage device, AC 4 73 Time delay undervoltage device, DC 5 74 # Static time delay, AC or DC (replaces complete oil displacement time delay undervoltage device) 4 75 See Table "A" Undervoltage device coil * 7 See Table "A" nstantaneous undervoltage device, AC (with coil) * 7 See Table "A" nstantaneous undervoltage device, DC (with coil) A979P3 Auxiliary switch 3 stage A979P Auxiliary switch stage * 77 92A979P2 Auxiliary switch 2 stage * 77 92A979P5 Auxiliary switch 5 stage A952G Auxiliary switch crank bracket B38G2 Auxiliary switch link assembly B38G Auxiliary switch link assembly P Tube * 8 457A43P8 Groove pin * 82 27A43G2 Auxiliary switch operating rod * 83 27A439P Auxiliary switch coupling * P203 Pin * B387G Adjusting plate P Open and close indicator ltnk B28G Open and close indicator B28G2 Charged and discharged indicator * Not shown. t Original breaker had no suffix letter or numeral. When ordering time delay undervoltage devices, the following information must be included: (} Complete nameplate reading of breaker involved. (2) Desired voltage rating of device, whether a c or de, and if a c, the frequency. # Order by circuit breaker Serial No. 75 9

10 ' Fig. 5. Static time delay, (Ref. No. 74) 0 TYPE AK POWER CRCUT BREAKERS Fig. 5A. Oildisplacement type timedelay undervoltage tripping device. TABE A Fig.. r r ;h t T e e + n nt;;neous Undervol Dev_ice _ AK2A50 manual Time Delav l]ndervolta D_(?_v_i [ Complete wth Coil Coil Only for Complete with CoilT Volts Hertz (less mountmg) (less mounting) Coil Only Reference 70 Reference l 7 (less mounting) Old Design Dashpot i Reference 73 ' Reference 75 (Flg. 3) Type Time Delay (Fig, 4) Coil Only Complete with Coil nstantaneous or 24 DC 39C4378G 27508G B309G 27508G DC 39C4378G G28 25 DC ' 39C4378G G DC 39C4378G G C4378G 27508G C4378G G C4378G G C4378G G C4378G 27508G C4378G G C4378G G C4378G G C4378G G C4378G G4 575 i0 39C4378G G C4378G G29 58B309G2 58B309G3 58B309G4 58B309G7 58B309G8 58B309G0 58B309G 58B309G3 58B309G4 58B309G7 58B309G8 58B309G9 58B309G2 58B309G G G8 58B309G G 27508G9 58B309G 27508G G G G27 58B309G G G2 58B309G G G7 58B309G G G2 58B309G G G G G G G8 NOTE: The static time undervoltage device (Fig. 4. Ref. 73) when used in combination with the static timing device (Fig. 5. Ref. 74) and a slight modification of breaker wiring will replace the older design oildisplacement type time delay undervoltage device shown in Fig. 5A. TABE B COSNG REAYS AND COS FOR CONVENTONA COSE AND QUCK COSE BREAKERS Quick close breakers are identified by the letter "S'' following the breaker type (i.e., AK2A50S3). Rating For Conventional For Quick Close Breaker Close Breaker "X" Relay *"W" Relay, Volts Hertz Closing Relay "X" Relay. Comp tete *Coil, Only Complete 25 2HGA H52 92A9770P 2 B797P203 92A977P2 DC 250 2HGAH592A9770P 3 B797P204 92A977P3 5 2HGAH74 92A9770P 5 B797P20 92A977P HGAH75 92A9770P 7 B797P209 92A977P HGAH75 92A9770P 9 B797P22 92A977P 5 2HGAH70 92A9770P 4 B797P205 92A977P HGAH792A9770P B797P208 92A977P HGAH792A9770P 8 B797P292A977P.l * Recommended for stock for normal maintenance. Only complete relay furnished. *Closing Solenoid, Complete CR9500B202H3A CR9500B202H4A CR9500B02AA CR9500B02A 7A CR9500B02A 7A CR9500B02A2A CR9500B02A3A CR9500B02A3A

11 Fig. 7. TYPE AK POWER CRCUT BREAKERS (PHOTO ) AK2A50 manual No. Required per Breaker Fig. Ref. AK250 AK2A 50 AK 3 50 AK3A 50 No. No. Man. Elec. Man. Elec. Man. Elec. Man. Elec. t 2 t 2 t t t t * 89 * * * * 94 * * * 23 * * X X X X X X X X X X 7 28 * ! Original breaker had no suffix letter or numeral. x Order as required. Quantity of 3 maximum for AK50 Breakers. *Not shown. t t X X Fig. 8. Drawout racking mechanism, (Ref. No. 95) Description 74V532P Pin for indicator 394A33P Retainer for indicator 709P7 Spacer for indicator 35A305P Spring for indicator G85 Terminal board ( 4 point) G8 Terminal board ( point) 42372P4 Terminal board support P Terminal board support 238D89G Drawout racking mechanism assembly 35A33P Pawl spring 42A35\P ink spring 9D089G Upper side sheet (left hand side) 9D089G2 Upper side sheet (right hand side) 888B0420Pl Wheel 888B0420P2 Shaft 84C0839G nterlock link assembly 92A97P53 Mounting stud 48A988P Jam nut 84C0839P atch 0740P2 Pin 77292P53 Rivet 84C0839P0 atch spring, in back of Ref A94P5 Spacer (left) 77292P58 Screw (left) 48A94P Spacer (right) 77292P59 Screw (right) P5 Trip paddle 92A957P Clamp 80B38G4 25B237P 38AllOG2 32A494Pl 709P72 Anti rebound hook and slider Secondary disconnect support Secondary disconnect device ( 7 pt.) nsulation Spacer

12 Fig. No. Ref. No. 9A 220 9B 220A * 22 * * TYPE AK POWER CRCUT BREAKERS No. Required per Breaker AK 250 AK2A 50 AK 3 50 AK 3A50 Man. Elec. Man. Elec. Man. Elec. Man. Elec. t t t t t t = l t t Description 845C27G Movable primary disconnect (not used on AKT) 32C255G Movable primary disconnect (for AKT only) 58B38Gl Maintenance handle 805B949G Closing switch 0 Overcurrent trip device 74V535P Window 29C272P8 Window (open and close) 98C997P2 Window (charge indicator) (when ordering window include label Ref. No. 22) 98C997P4 NP48A048 NP48A049 NP48A050 abel (charge indicator) Bib for front esc. (manual) (blue) Bib for front esc. (elec. breaker w/o closing switch) (blue) Bib for front esc. (elec. breaker with closing switch) (blue) * Not shown. t Original breaker had no suffix letter or numeral. o () No parts furnished for field installafum on EC trip devices. (2) Only part furnished for field installation on EC 2 or EC 2A trip devices is plastic cover, 242C45Pl. (3) When replacement trip devices are ordered, it is imperative that order includes complete nameplate reading of the breaker or breakers invulved and, if a contemplated ampere rating change is involved, the order should also include information as to ampere rating, time current characteristic, and instantaneous trip setting desired. NOTE: 2 llustrations and catalog numbers listed on the following pages apply only to Type AK 350 and AK3A 50 breakers. Fig. 9. Front view of back frame assemblyak350 Fig. 9A. Primary disconnect assembly (forak50), Ref. No Fig. 98. Primary disconnect assembly!for AKT50!, Ref. No. 220A.

13 3P Pole Without ground trip TYPE Fig. 20. AK POWER CRCUT BREAKERS MCignetic coil assembly for AK350 breakers Magnetic Sensor Coils Assembly TABE C With ground trip Rating Pole Rating 3P 200/00 3P 00/ /00 033C555 G5 3P For AKT3/3A /2000 3P 00/00 033C555 G7 3P For AKT 3/3A / C 555 G4 Fig. 2. Power supply unit Power Supply Units 052C922Gl0 Fig. 22. Power sensor unit (See Table D) 033C555 G9 033C555 Gll 033C555 G 3

14 Fig. 23. Fig. 24. Magnet trip device with mounting bracket Magnet Trip Device with Mounting Bracket 8439Gl Ground sensor coil with neutral mounting Fourth Wire Grid Sensor Coils 052C929Gl 4 TYPE AK POWER CRCUT BREAKERS TABE D S (O) S ( H) G Trip Elements POWER SENSOR OOC UNT, TYPE PS la S (O) G 8440G52 S ( H) G 8440G55 S (O) G 8440G s (m} G 8440G4 G 8440G58 S (O) G 8440G7 s (m} G 8440G70 S (O) G 8440G73 s ( H} G 8440G7 G 8440G79 S (O) 8440G4 s ( H} 8440G42 S (O) 8440G44 S ( H) 8440G G43 S (O) 8440G4 s ( H} 8440G47 S (O) 8440G48 s (m} 8440G G50 ong time delay element Short time delay element (2 to 5X range) Short timedelay element (4 to lox range) nstantaneous trip element Ground fault protective element Fig. 25. Power sensor kit Power Sensor Test Kit 002D252Gl0

15 NOTES

16 GEF450H 2/83 PS.B GENERA 8 EECTRC