Table of Contents. Description. Page. Introduction

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2 Description Introdction Table of Contents Qick Selector Breaker I Trip Combinations.... Qick Selector Replacement Breakers Breaker I Trip Combinations Breaker Designations Legend Type AKA Breaker Featres and Characteristics - Manal Operation Electrical Operation Type AKRU Breakers Page Enclosres and Montings MicroVersaT rip RMS-9 Devices Trip Devices -Tripping Fnctions EC Trip Devices DC Applications Accessories OEM Sbstrctre Ratings Derating Factors MicroVersaT rip RMS-9 Crrent Sensor Ratios... 3 AKRU Fses Electrical Characteristics -AKR-3 S AKR-315/T AKR Wiring Diagrams Time Crrent Tripping Characteristics Time Crrent Crves..., Otline Drawings Otline Dimension Drawing Nmbers Weights and Formlas Repetitive Dty Transformer Short Circit Crrent Crves Standards and References Gide Form Specifications... 6 Other AKA Circit Breaker Pblications www. ElectricalPartManals. com com 2 3

3 The General Electric line of Type AKR Low Voltage Power Circit Breakers (LVPCB) are intended for se in commercial, indstrial, and tility applications. Bilt to withstand intense service conditions, these circit breakers provide for the ltimate in system selectivity de to their short time 2 AKR-75 AKR-3S capabilities. These breakers are UL listed to ANSI standards for low voltage power circit breakers. The AKR breaker consists of five frame sizes: AKR-38, -3H, AKR-5, AKRT-5, AKR-75 and AKR-1; 8 throgh 4 Amperes with short circit ratings throgh 2, Amperes. AKR-5,'\KR-3H www. ElectricalPartManals. com com

4 Breaker Type AKR-3S 8 AKR-3, 3H 8 AKR-5, -5H 16 AKRT-5H 2 AKR AKR-1 4 Solid State Trip Device Frame Size (Am s ick Selector Breaker Trip Con:b1nations 25Vdc Electromechanical Trip Device A JJJ f.- 3 www. ElectricalPartManals. com com

5 Qick Selector Replacement Breakers Breaker 1 Trip Device Combinations Table 4.2 Ampere Ratings and Overcrrent Trip Devices 4 Breaker Type AK-25 6 AKS-5 16 AKST-5 2 AKR-75 3 AKR-1 4 6V ac 5 /6 Hz Solid State Trip Device Frame Size (Am s Vdc Electromechanical Trip Device www. ElectricalPartManals ElectricalPartManals. com com

6 ... Code AK AKS AKST AKSU AKR AKRT AKRU AKU General Type Old style LVPCB rl LJj AKR replacement for AK-5, AKJ-5 AKRT replacement for AKT-5, AKJT-5 AKRU replacement for AKU-5, AKJU-5 New style LVPCB 2A frame Integrally fsed version of AKR-3/5 Integrally fsed version of AK-25/5 Code N Discontined Example of Nameplate Designation Mic roversa - 8A AKR Trip Frame Type Device Size t t 8 [l] Trip Device Type EC Power Sensor ECS SST MicroVersaTrip MicroVersaTrip RMS-9 Epic Micro Versa Trip rm Non-atomatic Code Blank For Draw Ot Sbstrctre Monting 5 A 8 c D s w F Breaker Designations Legend \ D 1 Code Frame Size in Amperes (}) ac de S 8-3, 3H 5, SOH , <IJ Sffi D IS aff1xed to AKR des1gnat1ons to identify non-atomatic de models, e.g. AKR-NB-3 Monting Type Draw ot AKD Switchgear Draw ot AKD-5/6 Switchgear Draw ot AKR OEM Sbstrctre Draw ot AKD-6 Switchgear (AKR-75/1 only) Draw ot AKD-8 Switchgear and OEM Sbstrctre Stationary 33" Wide Stationary (AKR-1 only) OEM Sbstrctre AKR-75/1 only) www. ElectricalPartManals ElectricalPartManals. com com

7 Manal Openmg - AH Breakers All breakers, manal and electrical, are eqipped with a mechanical TRIP btton located on the breaker esctcheon. Manal opening is accomplished by displacing a mechanism latch that allows the toggle linkage, which holds the breaker's moveable contacts in the closed position, to collapse. Manal Stored Energy Closing AKR-3, -5 and AKRT-5 This circit breaker has a closing spring which is charged by a nmber of handle strokes (from one to for) depending on the angle throgh which the handle is rotated. Upon completion of the charging action, the springs are "propped" in the flly charged position and are discharged only by removing the "prop," releasing the spring to close the breaker. Closing is initiated by depressing a mechanical close btton on the esctcheon. 6 This circit breaker is closed by first rotating the handle conterclockwise approximately 1 degrees; this resets the mechanism and partially charges the closing spring. Retrning the handle clockwise to the normal position completes the spring charging and drives the toggle mechanism overcenter, closing the contacts. Manal Stored Energy Closing AKR-75 and -1 This circit breaker reqires for handle strokes to charge the springs. Unlike the smaller AKR frame sizes, the breaker's contacts close dring the forth handle stroke. Initiation of closing by separate close btton is not available. www. ElectricalPartManals ElectricalPartManals. com com

8 ::Jectrical Opening All breakers, manal and electrical, are eqipped with a mechanical TRIP btton located on the breaker esctcheon. Electrical breakers inclde a shnt trip device for remote opening. Electrical Stored Energy AKR-3. -5, -75 & 1 This electrically operated breaker tilizes a motor to atomatically keep the closing springs in a charged state. Whenever the control solenoid is energized, its operation releases the closing springs, closing the breaker contacts. (For typical electrical circit see pg. 38) Electrical Storeti f.negy -\K-25 and AKRiU)<3S Featres and Characteristics lectrical Ooerat1on This electrically operated breaker closes whenever the closing solenoid coil is energized. This cases an pward movement of the solenoid armatre which charges the springs to a predetermined over-center point for closing. (For typical electrical circit see pg. 38.) The initiation of the closing operation for both of the above types of breakers is by closing of a contact of a remote switch, relay or a close btton in the front esctcheon if the breaker is so eqipped. The breakers control schemes have an antipmp featre which allows only one closre of the breaker for a single operation of the closing contact no matter how long the contact may be held closed. This prevents the repeated operations that wold ense if one of the atomatic trip devices was activated at the time of closing. A manal closing handle is provided for maintenance prposes. All electrically operated breakers close within five cycles. www. ElectricalPartManals ElectricalPartManals. com com 7

9 Type AKRU Breakers The fsed low voltage power drohbffiar meenema standard SG3 and ANSI C37.13, and C They provide protection for systems with available falt crrent to 2, Amperes RMS symmetrical. Crrent limiting fses are provided 8 Open Fse Lock Ot Indicators as an integral part of the fsed draw ot breakers in the 8 and 16 Ampere frame sizes. The 32 and 4 Ampere frames are available with coordinated fses separately monted in a draw ot fse carriage or fse roll ot element (station- ary monted fsed breakers are not available.) An open fse lock ot device is an integral part of all fsed power circit breakers. This device prevents single phasing by monitoring the fses. Shold any fse blow, this direct acting AKRU-5 Fses device trips the breaker, opening all three poles simltaneosly. Individal phase indicators pin point the blown fse. The breaker remains locked ot ntil the fse is replaced and the device is reset. www. ElectricalPartManals. com com

10 Metal-Enclosed Low Voltage Power Circit Breaker AKD-8 Switchgear Enclosres and Montings Type AKR draw ot LVPCB's are frnished in AKD-8 low voltage switchgear with integrated short circit ratings. The eqipment is designed, manfactred and tested to NEMA SG5, ANSI C and UL1558. AV-LINE R Switchboards Type AKR breakers are frnished as stationar y monted or draw ot sbstrctre monted in AV-LINE switchboards with integrated short circit ratings. The eqipment is designed, manfactred and tested to NEMA PB-2 and UL 891. www. ElectricalPartManals ElectricalPartManals. com com 9

11 Type AKR breakers, both for stationary and sbstrctre draw ot monted designs are available, and are UL Iisted to ANSI C37.16 standards. The sbstrctre is the eqipment monted component of a closed-door draw ot breaker nit. Serving as the stationary receptacle, it provides means for monting and connecting (both primary and secondary) the draw ot breaker (removable element). The basic sbstrctre is a self-contained, factory-aligned frame-work designed for convenient monting as individal breaker compartments of switchboard or switchgear eqipments. In conjnction with a line of accessories, 1 it offers the eqipment bilder all the mechanical and electrical components necessary to otfit a compartment for closed-door draw ot AKR breakers. All AKR sbstrctre breakers (draw ot monting type "D" for AKR-3 and -5 and type "F" for AKR-75 and 1 ) are eqipped with extended ("deep") esctcheons. This configration allows the breaker to be racked between the CON NECTED, TEST, and DIS CONNECT positions withot the need to open the compartment door. On all frame sizes the draw ot mechanism is breaker monted. The racking handle is inserted throgh the breaker esctcheon on AKR-3 and -5, and throgh the compartment door on the AKR-3S, -75, and -1. As the rack ot handle is trned, it rotates slotted racking arms or cams on each side of the breaker frame. The cams engage fixed pins monted on both sides of the sbstrctre, moving the breaker in and ot. The draw ot operation featres for positions. In the CONNECTED position the primary and secondary disconnects are flly engaged. The breaker mst be opened before it can be racked in or ot of this position. When in the TEST position, the primary disconnects are disengaged, bt the secondary disconnects remain engaged. This permits breaker operation withot energizing the primary circit. In the DISCONNECT position neither primary nor secondary disconnects are engaged. Breakers may be racked between these three positions with the compartment door closed. Each position is clearly identified by markings which appear on the left side of the esctcheon as it emerges throgh the door ct ot. With the door open, the breaker can be plled ot manally from the disconnected position. www. ElectricalPartManals ElectricalPartManals. com com

12 Draw Ot General Prpose Enclosre- NEMA 1 For indoor se, the one-high The draw ot mechanism closed door draw ot steel is externally operated by a hosing is complete with a removable racking handle. draw ot breaker (draw ot Two mechanism types monting type letter "/\'). are employed. A breakermonted, screw I traveling The nit is wall-monted in the AKR-3 and -5 sizes, nt type services the AKRfloor-monted in the AKR-75 3 and -5 frames, and the and -1 sizes. racking handle is inserted The draw ot operation throgh an opening in the featres the same for positions and fnctions in the eqipment monted type breaker esctcheon. The same manner as described mechanism is employed on earlier tor draw ot AKR sbstrctres. Breaker position, (monting type "/\' break the AKR-75 and -1 models thogh, is clearly identified ers), and the racking handle by a rotary indicator visible is inserted throgh an opening in the left side of the throgh a door opening. With the door open, the door. In both mechanism breaker can be plled ot types the breaker is spported by two pins protrd manally from the DISCON NECT to the WITHDRAWN ing from each side of its position so that the breaker frame, these engaging slots is completely ot of its compartment and ready for tened to the enclosre walls. in the telescoping rails fas removal. www. ElectricalPartManals. com com ' II 11

13 The RMS-9 MicroVersaTrip system for AKR low voltage power circit breakers?onsists of for parts: plg-in protection programmer, flxshift trip device, crrent sensors and rating plgs. The programmer contains a crrent sensor-powered, solid-state logic nit and incorporates rotary adjsment switches for p to nme fnctions, as well as targets for mechanical falt trip indication. MicroVersaTrip RMS-9 represents the latest technology in digital solid-state programmers. RMS Digital Sensing of Sinsoidal and Nonsinsoidal The RMS-9 provides accrate overload protection for both sinsoidal and nonsinsoidal crrents by direct measrement of the tre rms content of the crr.ent wave. This is accomplished by microprocessor digital sampling techniqes. F IOd <::rrl'rl\ Sensor 12 Therefore, the solid state microprocessor is not affected by component tolerance and does not reqire compensation for signal distortion. Since the design is based on complimentary metal oxide (CMOS) technology, it is less sensitive to extraneos noise prodced by lighting, instrmentation, radio, etc. The solid state microprocessor technology and fast analog to digital converters make it possible to measre the magnitde of the phase crrent over a nmber of time periods within the cycle. The RMS-9 sampling rate of 27 per cycle for each phase allows for errors of less than 1% on systems with distortions throgh the 13th harmonic. This digital sampling techniqe provides the most accrate system protection fo distribtion systems that mclde ac and de variable speed drives, rectifiers, indction heating, and other loads MicroVersaTrip that case non-sinsoidal crrents. A FH Fnction lnp Unit Available with Vanos Gombmat1ons of Protection Featres. The RMS-9 trip line of programmers provides maximm breaker to breaker selectivity and cstom load protection. Short-ti e ad Grond Falt fnctions Inclde the flexibility of coordination with and withot an 12T ramp. Type AKR power circit breakers are available with High Range Instantaneos, No Instantaneos, or Switchable (OFF) Instantaneos, and Grond Falt. All programmers inclde a clear plastic cover with provisions for sealing for tamper-proof installation. Flx-shift Trip Device The flx-shifter is a low energy, positive action trpping device that is atomatically powered and controlled by RMS-9 System Components the protection programmer. The low energy signal from the programmer conteracts the strength of a permanent magnet in the flx-shifter, allowing a spring to nseal the magnet and trip the breaker. Crrent Sensors Three toroidal crrent sensors provide maximm flexibility and reliability with minimm signal error. Crrent sensor ratios are shown in Table 3.1, page 3. Ratin Plgs Provide Convenient Flexibility in Ma!tching Load Reqirements All RMS-9 programmers tilize a broad range of field installable rating plgs for ftre prating capability, minimm size cable selection, and an extra degree of coordination flexibility. www. ElectricalPartManals ElectricalPartManals. com com

14 N A 8 C FMR Power Spply Board INST SWITCH GROUND FAULT SIGNAL AID SWITCHES Programmer Faceplate COMPARATOR MicroVersaTnp" RMS-9 block diagram. IOC TRIP ILP GF LT ST TRIP TO FLU SHIFTER Logic Board Ep1c MicroVersaTrip'" Board (when sed) www. ElectricalPartManals ElectricalPartManals. com com 13

15 Trip Devices Micro Versa Trip R 1. Crrent Setting -Standard 2. Long-Time Delay -Standard 3. Long-Time Pickp Light -Standard 4. Short-Time Pickp -Optional 5. Adjstable Short-Time Delay-Optional 6. Instantaneos Pickp -Standard 7. Grond Falt Pickp -Optional 8. Grond Falt Delay -Optional 9. Falt Trip Annnciator (Local) -Optional 1. Rating Plg Not shown: Adjstable High Range Instantaneos -Optional Zone Selective Interlock -Optional The qantity of these fnctions in any given breaker is determined by complete catalog nmber. 14 RMS-9 Programmer Tripping Fnctions MicroVersaTrip RMS-9 Programmer www. ElectricalPartManals. com com

16 Table 15.1 MicroVersaTrip RMS-9 Programmer Fnction Settings Frame Size Crrent Long-time Short-time Max. Sensor Setting Pick Up (Mltiple Pick Up (Mltiple Amp Rating (Amps) (Mltiple of of Crrent Delay<D of crrent Delay Rating (S) Rating Plg Amps) Setting) (Seconds) Setting) (Seconds) () (C) (C) AKR-3S.5,.6,.7,.8, Fixed at 1. of 8 15, 4, 8 AKR-3H.9,.95, 1., 1.1 Crrent Setting AKR , 16 AKRT AKR AKR ,.6,.7,.8, Fixed at 1. of.9,.95, 1., 1.1 Crrent Setting.5,.6,.7,.8, Fixed at 1. of.9,.95, 1., 1.1 Crrent Setting.5,.6,.7,.8, Fixed at 1. of.9,.95, 1., 1.1 Crrent Setting.5,.6,.7,.8, Fixed at 1. of.9,.95, 1., 1.1 Crrent Setting Adjstable Adjstable High Range Instantaneos Instantaneos Instantaneos Frame Pick Up withot ST Pick Up with ST (Mltiple of Frame Size (Mltiple of Rating (Mltiple of Rating Short-Time Plg Amps) Plg Amps) Rating) {) () (H) AKR-3S 1.5, 2, 3, 1.5, 2, 3, 5, 7,.6, AKR-3H 5, 7, 9, 1 9, 1, 13, 15.8, 1. AKR-5 AKRT-5 AKR , 2, 3, 1.5, 2, 3, 5, 7,.4, 5, 7, 9, 1 9, 1, 13, 15.8, , 2, 3, 1.5, 2, 3, 5, 7,.4, 5, 7, 9, 1 9, 1, 13, , 2, 3, 1.5, 2, 3, 5, 7,.6, 5, 7, 9, 1 9, 1, 13.8, , 2, 3,.4, AKR-1 1.5, 2, 3, 5, 7, 9 5, 7, 9 1. <D Time delay shown at 6% of crrent setting at lower limit of band. Time delay shown at lower limit of each band. All pickp tolerances are± 1%..4,.8,.4,.8,.6,.6,.6, Refer to Bylog catalog Table 1, page 6-3 for frame short-time For AKR-3S only. 2.4, 4.9, 9.8, 2 2.4, 4.9, i"t in.<d 9.8, 2 1.5, 2., 2.5,.4 2.4, 4.9, 3., 4,., 5., 9.8, 2 7., 9. I"T ot 2.4, 4.9,.1,.21, , 2 2.4, 4.9, 9.8, 2 Triple Selective Trip, Fixed High Range Pickp (Mltiple of Sensor amp Rating) (S) +.2,.25,.3, 22kA.35,.4,.45, -2%.5,.6.2,.25,.3, NA.35,.4,.45,.5,.6.2,.25,.3, NA.35,.4,.45,.5,.6.2,.22,.24, NA.26,.28,.3,.34,.37.2,.22, NA.24,.26,.28,.3 Tnple select1ve tnp 1s standard when long-time/short-time only is reqired. Time delay shown at lower limit of each band. Grond falt pick p Grond Falt Delay Delay with I"T withot 12 (Seconds) (Seconds).1,.21, ,.21,.35 at 2% of pick p at lower.1,.21,.35 limit of band.1,.21,.35.1,.21,.35 not to exceed 12 amps. = S = C = H = Rating plg amps Sensor amp rating Crrent setting Short-time rating Table 15.2 MicroVersaTrip RMS-9 Programmer-Available Combinations (Add Sffix to Basic Catalog Nmber) Programmer Long- Short- Sffix time time (L) (S) Adjstable Instantaneos L1 LIT1 LIGT2 LIGT2Z1 LSIT1 LSIGT2 LSIGT2Z1 LSIGT2Z2 Adjstable High Instantaneos LSHT1 LSHGT2 LSHGT2Z1 LSHGT2Z2 Fixed High Instantaneos LSKT1 LSKGT2 LSKGT2Z1 LSKGT2Z2 No Instantaneos(!) LST1 LSGT2 LSGT2Z1 LSGT2Z2 Switchable Instantaneos/Grond Falt<D@ LSIGT2 <D Not available for AK-7-3S or AKRU-7-3S. Only available for AKR-7-3S or AKRU-7-3S. Adj. Fixed Adj. High High In st. In st. In st. {I) (H) (K) Reqires zone selective interlock modle types TIM1 (12V ac control voltage) or TIM2 (125V de control voltage). GF GF/ST Grond OLISC OLISC/GF Zone Zone Switch Falt Targets Targets Interlock Interlock lnst/gf (G) {T1) (T2) (Z1) (Z2) () www. ElectricalPartManals ElectricalPartManals. com Not UL Listed. 15

17 Trip Devices MicroVersaTnp" RMS-9 Tripping Fnctions Long-Time Fnction Moving from left to right on the crrent axis, Figre 16.1, the pper part of the time crrent crve is the longtime pickp. This is the fnction sed to protect a circit against low magnitde overcrrents. The breaker trips becase the crrent has exceeded the long-time setting. If a breaker is protecting a motor, the start-p srge (in-rsh crrent) can be accommodated by setting the breaker to allow for a momentary delay while the motor has a chance to reach its normal operating speed or fll load crrent. Short-Time Fnction The middle portion of the crve is the short-time fnction. It is sed to protect against higher magnitde overcrrents and low-level short circit falts. Overcrrent de to short circits is generally in the order of 1 or more times fll-load crrent, and is measred as symmetrical RMS (root mean sqare) short-circit crrent. Instantaneos Fnction At the bottom of the time crrent crve is the protective device's instantaneos fnction. The instantaneos trip point determines the level at which the breaker will trip withot an intentional time delay. This immediate interrption occrs only as a reslt of a severe overcrrent condition, sch as a high-level short circit, that wold damage the electrical system if not interrpted. An instantaneos trip can be adjstable, depending pon the application. 16 _, "" 1 a.. a " a.. a " a.. a " a " a " 9 ' ' 7 a a 9 ' 7 ' ' ' ' ' '. ' ' CURRENT SETTING 1 1 LONG-TIME PICKUP long Ttme /...,.--,...,.. --,alo.. '-'\ lnt MULTIPLES OF CURRENT SETTING (C) LONG-TIME DELAY, r-: - = - // /. V/ /. /. // / //; / % ' 'I 1/1 + AOJUSTAaLt /V t;; VY:: { < Appltrdl <'ln Det..,,.,,ne End 1 C'v 2 v /V:/'/ V/; «v INSTANTANEOUS PICKUP 3 S f 1.5 & 9 OFF V/ 7. 5 & 1191 " " MULTIPLES OF INSTANTANEOUS PICKUP www. ElectricalPartManals. com com h. C2 fllte.d

18 I Ft Fnction An Ft fnction is available with MicroVersaTrip. This provides a ramp fnction Wt =constant) in the shorttime and grond falt characteristic (See Fig. 16.1) that allows maximm coordination with downstream thermal-magnetic protective devices that follow a crve instead of a sqare path. The 12t fnction also allows tighter motor protection by accommodating the transient inrsh while the shorttime pickp remains jst slightly higher than the steady state starting crrent. In other words, the path follows the hypotense instead of the right angle. When the sqare short-time path might intersect with a downstream fse or breaker, the l2t fnction permits the short-time delay path to veer in front of the time crrent crve for the downstream device. Withot this fnction, coordination and selectivity wold be difficlt to attain. Grond Falt Protection A grond falt is nintentional crrent flowing from a circit throgh a condcting path to grond. It is sally of a low magnitde (less than the long-time pickp vale) and not sensed by the protective device. Using modern electronic trip devices, protection against grond falts can be bilt into a distribtion protection system with grond falt pickp and delay fnctions added to the circit breaker's falt interrpting capability. Before electronic trips came on the scene, a complex collection of external relays and crrent sensors were needed to sense a grond falt and signal a breaker to trip. Eight grond falt pickp levels and three delay bands with l2t in and ot to allow fll selectivity, insring that only the breaker closest to the grond falt will trip. Addition of zone selective interlocking for the grond falt fnction frther enhances this protection by permitting "timed" tripping and closer back-p protection. g 1 t g,' '"I!""g'g""!- f-+-++-i'h t---1 '" GROUND FAULT R!E PICKUP I OFF GROUND 2 FAULT DELAY T IN 12T OUT l: t.: [/ MA MA INT INT f\ I' I OlfT rdt' : I : EJggg LoT '1-+++W----t"d-t--H- ie Ma LVPCB 1-- MC & ICCB Moo 1},..._ LVPCB - LVPCB MC &!CCB Fig 17.1 Time Crrent Crve Definition Grond Falt 17 www. ElectricalPartManals. com com

19 Type AKR Breakers Trip Devices MicroVersaTrip R Crrent Setting (Standard) The adjstable crrent setting determines the nominal long time crrent setting with a ± 1 % band width. With a 1.1 setting the breaker will carry indefinitely withot tripping the rating plg rating. Changing the setting changes the norminal crrent rating for the breaker. Long-Time Delay (Standard) This long-time delay adjstment varies the time it will take the breaker to trip nder sstained overload conditions. It provides the fnction of withstanding momentary overloads sch as motor starting, welding, or other overcrrent conditions withot interrpting the service. RMS-9 Tripping Fnctions Long-Time Pickp Light (Standard) The long-time pickp light provides visal indication that the breaker is experiencing an overload condition. Indication is provided by a light-emitting diode (LED) which is only activated prior to trip-ot and dring long-time time-ot. Saves test and system start p time. Short-Time Pickp (Optional) This short-time pickp adjstment controls the level of high crrent the breaker can carry for short periods of time withot tripping. Permits downstream breakers to clear short circit falts withot tripping ot the pstream protective device. 18 CURRENT SETTING 1.1 SETTING( C) LONG TIME DELAY 2 3,. DELAY RATING PLUG CAT. NO. TR2S2 x2ooo A TEST S2A PICKUP PICKUP SHORT TIME PICKUP 2.5C 3C 2C C 1.5C SC 9C 7C SHORT-TIME PICKUP www. ElectricalPartManals. com com

20 Short-Time Delay (Optional) Adjstable Instantaneos Pickp (Standard) The short-time delay adjstment is sed in conjnction with the short-time pickp setting to provide a frther refinement of coordination between circit breakers. It establishes the time interval the breaker will wait before responding to the shortcircit crrent level selected on the short-time trip point adjstment. The instantaneos trip point determines the level at which the breaker will trip withot intentional time delay (.25 seconds or less). This immediate interrption occrs only as a reslt of a severe overcrrent condition, thereby minimizing damage to the electrical system and eqipment. SHORT TIME DELAY 12T IN 12T OUT MA MA.::' ':. DELAY INSTANTANEOUS PICKUP 3 S 2@7 1.5 & 9 OFF INSTANTANEOUS PICKUP www. ElectricalPartManals ElectricalPartManals. com com 19

21 Trip Devices Contined High Range Instantaneos Grond Falt Pickp and Grond Falt Delay (Optional) The grond falt pickp adjstment controls the level of grond falt crrent at which circit interrption will occr. To comply with the 1981 National Electrical Code (NEC 23-95), no trip point exceeds 12 amperes. The common sqare knee of the crve can be replaced with an l2t fnction to facilitate coordination with downstream devices sch as thermalmagnetic breakers and fses whose time-crrent crves do not easily relate to the sqare-shape sensing characteristics common to solid state trip devices. Memory Circit Becase of the highly intermittent and erratic natre of arcing grond falts, a memory circit has been incorporated in all MicroVersaTrip grond falt sensing circits as standard. The memory circit integrates arcing falt crrent with time, essentially smming the intermittent grond crrent spikes. In the 2 Incldes adjstable shorttime pickp, adjstable short-time delay and a highlevel instantaneos setting is adjstable in for steps from 4 to 1 percent of the circit breaker frame The grond falt delay adjstment is sed to add a pre-determined delay in time to the trip point once the grond falt pickp level has been reached. This provides tripping selectivity between main and feeder or other downstream breakers. The grond falt nit also incldes as standard an inverse 12t ramp to sbstantially improve coordination with downstream protective devices sch as fses and thermal magnetic circit breakers. diagrams, it can be seen how the memory fnction works. Diagram A shows a typical grond falt with half-cycles, whole cycles and mltiple cycles missing, as normally occrs. Diagram B shows trip response of a typical grond falt fnction which does not inclde memory. The short-time rating permitting maximm se of the breaker's short-time capability. This high level instantaneos fnction increases system protection withot losing selectivity. GROUND FAULT PICKUP OFF GROUND FAULT PICKUP GROUND FAULT DELAY 1 2 T IN 1 2 T OUT MA MA -@", GROUND FAULT DELAY breaker never trips becase the time delay circits -f-1rr-''-+:11--l--l...li...j..l-'---- reset with every missing cycle. Diagram C shows response B +- _..._.. _..L_.LL.-1-L.L--. of Micro Versa Trip falt circits to the same grond falt; the circit's memory carries throgh the missing cycles and gener G-coc-nd_F_ac-1 R-e-spo-ns-e--+- With Memocy ates a trip Signal after the preset time delay. www. ElectricalPartManals. com com *

22 Falt Trip Indicators Indicators are designed to redce system downtime by analyzing any overcrrent falt and identifying its case. Mechanical pop-ot type indicators are available on the programmer for identifying overload or short circit overcrrent falts when breakers are ordered withot integral grond falt protection. Indicators are available to identify overload, short circit and grond falt trips - for breakers spplied with integral grond falt protection. Zone Selective Interlocking The standard means of obtaining selectivity between main and feeder breakers is by incorporating programmers with timecoordinated trip characteristics. This consists of setting the farthest downstream breaker with a small time delay, and progressively increasing the time delay as yo get closer to the main protective device. The disadvantage in this method is that the system mst now endre the stress of the high crrent falt ntil time-ot occrs. The Zone Selective Interlock modle, Figre 21.1, receives a signal from a downstream MicroVersaTrip programmer (Logic ) which cases the modle to transmit a low-level interlock signal to a MicroVersaTrip programmer pstream. The interlock signal activates the LED portion of an LED- OVERLOAD Transistor Opto-isolator in the pstream programmer casing the fixed delay band to shift from "MIN" to the programmer delay band setting Figre Both the Short-Time and Grond Falt fnctions are capable of being interlocked. Zone Selective Interlocking is available for the shorttime fnction and the grond falt fnction, or for the grond falt fnction only. SHORT CIRCUIT GROUND FAULT TRIP INDICATOR PUSH TO RESET Fig Mlti-Zone Interlocking www. ElectricalPartManals ElectricalPartManals. com com 21

23 Trip Devices EC Trip Devices DC Applications General Type EC overcrrent trip devices are magnetically operated, sing a series coil (or single condctor and an associated magnetic strctre) to provide tripping force. Three basic characteristics: long-time delay, shorttime delay and instantaneos, can be sed in varios combinations to sit the application. Type EC-2A Trip Device for 6-2 amp frame breakers. Available in combinations of long-time and instantaneos elements, or instantaneos alone. Table 22.1 Adjstment Ranges for EC Trip Devices Long-Time Delayis accomplished with a positive-displacement oil piston. Sealing of the assembly eliminates variations cased by atmospheric contamination, and silicone oil minimizes variations in time delay de to changes in ambient temperatre. Short-Time Delay is accomplished with a rgged mechanical escapement. Type EC-1 lnstantaneostripping is obtained when a tension spring yields to the force exerted on the magnetic armatre at short circit crrent levels, permitting the armatre to move independently of the time delay piston. AKR breakers with EC trips are for se on DC system voltages, and are available in ratings of 4-6 amperes. One EC trip device Trip Device for 6-2 amp frame breakers. Combines long-time and short-time elements for intentional delay p to the short-time rating of the breaker. Instantaneos may be added. Tr ip Long-Time Short-Time Instantaneos Device Pickp <D Delay Pickp Delay Pickp (1A) MA- adj sec or 4-9 EC-2A 8-16% (1B) INTER- adj sec (±1%) or 9-15 or (1C) MIN -adj sec 8-25% (1A) MA- 3sec (2A) MA - 23 sec or 2-5 or High Set EC % (1B) INTER -15 sec 3-7 or (2B) INTER -15 sec p to 15 (±1%) or 4-1 or Non-Adjstable (1C) MIN- 5 sec (2C) MIN -7 sec (2AA) MA -2 sec (188) MA-45 sec 2-5 or 4-9 EC % or 3-7or (288) INTER- 13 sec 6-12 (±15%) (1CC) MIN- 2 sec 4-1 or 9-15 or (2CC) MIN - 7 sec 8-25% <D = Trip device ampere rating. If trip devices are set above 1% for coordination prposes, sch settings do not increase the breaker's continos crrent rating. www At lower limit of band at 6 times pickp setting. At lower limit of band at 2V2 times pickp setting. Low-set instantaneos. Not available in combination with long time delay. 22 is monted in each breaker pole and contains fnctional adjstments, overcrrent detection and tripping hardware. EC trip devices are available as type EC-2A (standard for frames throgh 2A), EC-1 (optional for frames throgh 2A) and EC-18 (standard for 4 and 6A frames). Trip characteristics are described in the table below. Type EC-18 Trip Device for 4 and 6 amp frame breakers. Combines long-time and short-time elements for intentional delay p to the shorttime rating of the breaker. Instantaneos may be added. www. ElectricalPartManals ElectricalPartManals. com com

24 Accessories Shnt Trip The shnt trip offers remote electrical tripping of breaker. It is sally controlled by a switch or pshbtton and may also be sed in conjnction with protective relays for atomatic tripping. The shnt trip coil is rated for intermittent dty. When factory installed it is spplied with a ctoff switch which atomatically removes control power following a breaker trip. Undervoltage Trip The ndervoltage trip protects against harmfl drops in line voltage by atomatically tripping the breaker. This device is set to pick p at approximately 85% of bs voltage, and drop ot between 3% and 6%. The UV device is also available with an optional static time-delay nit. This offers a field-adjstable two to six second delay between ndervoltage falt and breaker trip to prevent potential nisance tripping de to momentary loss of voltage. The time delay nit is monted external to the breaker. It is rated 125 or 25V de or 28/24V ac, 5 or 6 Hz. For any other ac sorce voltage, a control power transformer with a 24 Volt secondary rated at least 1 Va is reqired. www. ElectricalPartManals ElectricalPartManals. com com 23

25 Accessories Contined Axiliary Switch The axiliary switch is sed for remote indication of breaker main contact position. It is available in gropings of tor contacts (two stages) or ten contacts (five stages). Each stage is composed of one "a" Ty pe (N.O.) contact and one "b" Type (N.C.) contact. All contacts featre rgged doblebreak constrction. Electric Lock Ot Device The electric lock ot device provides a means of electrically interlocking breakers so that two cannot be closed at the same time. This electromechanical device consists of a coil whose winding mst be energized to close the breaker. Once the breaker is closed, loss of voltage will not trip the breaker. A bypass interlock is provided tor initial startp. Refer to the UV device tor ratings and coil characteristics. Axiliary switches for cross-interlocking breakers mst be ordered separately. Bell Alarm Switch The bell alarm operates one "a" and one "b" contact, two "a's", or two "b's". It is activated when the breaker is tripped by any means (atomatic) other than the manal trip btton or the shnt trip device. The contacts may be sed for remote indication of an atomatic trip. The lock ot featre is available to mechanically lock the breaker "Open" when the device is activated. "Reset" is accomplished throgh operation of the manal trip btton or shnt trip device. The bell alarm is available withot the lock ot featre when so specified. 24 Key Interlock Provision Prevents operation of a remote fnction nless the breaker has been tripped. Provision is made to accept a lock assembly frnished by prchaser (Kirk or Sperior.) www. ElectricalPartManals. com com

26 Close Btton The AKA electrically operated breaker is frnished as standard withot operating handle and is closed by receipt of a signal provided by the remote momentary closre of a contact of a relay or switch. A close btton esctcheon, monted, momentary contact is available when specified. Open Fse Lock Ot Device The open fse lock ot device atomatically trips the breaker if one of the fses opens. The breaker is locked open ntil the reset btton of the phase involved is reset. Remote Close Solenoid (For manally-operated AKR-3H, -5, AKRT-5H breakers) The solenoid provides a means to electrically close the above breakers from a remote location. It may be controlled by a switch or pshbtton for five-cycle closing. Breaker mst be charged locally. Available ratings: See Table 39.2, page 39- not available on AKR-38. Maintenance Clc-sing Handle The maintenance closing handle is frnished as standard (one handle for p to five breakers.) The maintenance handle is provided for the slow closing motion reqired dring contact adjstment procedres (not reqired on manally operated AKR-75 and 1 breakers.) Fse Roll Ot The AKR-75 and-1 draw ot AKRU breakers reqire a separate fse roll ot. All fse roll ots accept Class L fses 8-4A. The draw ot breaker elements sed in conjnction with these fse roll ot elements shold be eqipped with an open fse lock ot device. The breaker component shold have provisions for key interlock. Reverse Crrent Device Operations Conter The reverse crrent device This accessory monts on is available for de breakers the breaker as a five digit, only. It is designed to trip the non-resettable conter breaker if crrent reverses actated by the breaker direction. cam shaft. 25 www. ElectricalPartManals. com com

27 Accessories OEM Sbstrctre Secondary Disconnects Breakers may be ordered with p to twenty-one draw ot control disconnect points frnished in grops of seven. Seven circit disconnect block kits and monting brackets for p to three blocks are available for monting in the sbstrctre. Keylock Provision Keylock accessory kit provides mechanism interlock assembly for monting a single or doble mltiple lock. 26 Forth Wire Disconnect Forth wire disconnect kits for se when three phase, for wire grond falt protection is reqired provides for connection to forth wire netral sensor. Position Switch The position switch is activated by the AKR breaker when the breaker is in its connected position and then contacts of the switch change state when moved to the test position. www. ElectricalPartManals. com com

28 Crrent Transformer Monting Hardware Provides the necessary monting hardware for monting applicable crrent transformers in the sbstrctre. Programmer Secondary Disconnect Reqired when programmer on breaker has zone selective interlocking. Door Interlock Kit Provides for interlocking door (hinges left or right) sch that breaker mst be in the disconnect position before door can be opened. Interlock is defeatable for athorized access. 2UA "T" Connector (For 16A and 2A sbstrctres.) Provides alternate means for bs connecting to the sbstrctre. Shtter Kit Shtters to cover primary disconnects when breaker is moved to the test position. Provisions for Padlocking Breaker in Disconnect Position Padlock assembly engages with the breaker monting bracket in the sbstrctre. It prevents the breaker from being moved from the disconnected to the test or connected positions. The padlock slot will accept three, 3fa inch diameter hasps. www. ElectricalPartManals. com com 27

29 Ratings Basic Ratings AKA L VPCB with Micro Versa Trip RMS-9 programmer is rated for shorttime withstand crrent and interrpting capacity (rms symmetrical). The maximm short-time rating is shown for 3 cycle dration at 5/6 Hz. Table 28 1 Smmary of Breaker Ratings Rated Voltage Breaker Type Frame Size For de applications, electromechanical EC type trip devices are available for de ratings p to 25Vdc. Short Circit Ratings RMS Symmetrical With Withot (Nominal) (Amperes) Shortlnstanta- lnstanta- Time 6Hz neos Trip neostrip AK AKR-3S AKR AKR-3H AKSIAKR-5 16 AKSI AKR-5H AKST I AKRT -SOH AKR AKR AK AKR-3S AKR AKR-3H AKSIAKR AKSI AKR-5H AKST I AKRT -SOH AKR AKR AK AKR-3S AKR AKR-3H AKSIAKR AKSIAKR-5H AKST I AKRT -SOH AKR AKR ka Table Overcrrent Trip Device Crrent Ratings 1n Amperes MicroVersaTrip RMS-9 5/6 Hz ac Breaker Frame Sensor Rating Rating Plg Amps (x) AK-25 Amps (s) Tappe d Fixed Plg 7, 1, 15, 225 Rating Eqals 2, 3, 4, 6 Sensor Tap 15 6, BO, 1, 125, 15 AKR-3S, 4 15, 2, 225, 25, AKR-3 3, 4 AKR-3H BOO 3, 4, 5, 6, 7, BOO AKR-5 AKR-5H AKRT-5H 2 AKR AKR-1 4 x Rating plg amps BOO 3, 4, 5, 6, 7, BOO 16 6, BOO, 1, 12, 16 s Sensor amp rating Table 28.3 Fsed Breaker Ratings- Maximm 6V ac 516 Hz CD The maxtmm fse ratmg ts the largest fse whtch tests show wtll reslt tn proper performance of the breaker and fse in combination nder short circit conditions. Only Gold fses shold be sed for proper coordination. Fses are monted on separate fse roll-ot element. Refer to time-crrent crves GES-6 (for EC-1) and GES-65 (for EC-1 B). Observe Table 5 minimm overcrrent trip ratings. Only dal ratio sensors are available on AKR-3S when programmers are frnished with High Range Instantaneos or Triple Selective Trip. Triple Selective Trip at 1 short-time rating when standard Instantaneos Trip is omitted. Interrpting Fse Rating Frame Rating RMS Breaker Size Amperes Sym- Type Amperes (j) metrica I Min. Max. ka AKU AKRU-3S BOO AKRU-3 BOO AKRU AKRU AKR Table V de Crrent Ratingswith EC Trip Device Only Breaker Type Frame Size Amperes Short Circit ka AK AKR-3 BOO 25 AKR AKR AKR BOO, 1, 12, 15, 16, 2 12, 1, 24, 32 15' 2' 25' 3, 4 EC Device Rating de 4, 5, 7, 9, 1, 125, 15, 175, 2, 225, 25, 3, 35. 4' 5' 6 NOT AVAILABLE ON AKR-3S 1,125,15,175,2, 225, 25, 3, 35, 4, 5, 6, BOO 2, 225, 25, 3, 35, 4, 5, 6, BOO, 1, 12, 16, 2-2' 25' 3' 4 2, 25, 3, 4, 5, 6 Table 28.5 Minimm EC Trip Ratings- Amperes at 25V de With With Short-Time Trip Breaker In stan Characteristic Type neos Trip 2C 2B 2A AK AKR AKR CC 2BB 2AA AKR-75 AKR www. ElectricalPartManals. com com

30 Temperatre Derating Factors The continos crrent rating of AKR breakers is based on their se in an enclosre in a 4 C ambient and on a maximm breaker temperatre of 15 C for Altitde Correction Factors When applying low voltage power circit breakers at altitdes greater than 66 ft., their continos crrent rating mst be modified becase a higher temperatre se will be experienced for a given crrent rating. The voltage ratings mst also be modified becase of Standards and Testing Type AKR low voltage power circit breakers are designed to meet ANSI standards C37.13 and C37.16 and are tested to ANSI C37.5 and C The breakers are UL listed and labeled certifying com- Hmidity and Fngs Ferros parts are cadmim or zinc plated for corrosion protection with the exception of some parts that are made from alloy steels and are inherently corrosion resistant. Crrent-carrying parts are silver or tin plated for corro- the lower dielectric strength. The short-time and short circit crrent ratings are not affected by altitde. However, the short circit crrent rating shall not exceed that of the voltage class prior to derating. Rating correction factor for low voltage power circit breakers are as listed in ANSI C pliance with the referenced ANSI standards. The test circit /R ratio and power factor reqired by ANSI C37.13 for nfsed breakers is 6.6 with 15% power factor; for fsed breakers is 4.9 with 2% power factor. sion protection and to assre electrical connections. Tropical treatment is available and consists of the application of a fngs resistant varnish to those inslating materials that are not inherently fngs proof. Derating Factors Class A inslation. Continos crrent ratings of AKR Table 29.1 Continos Crrent Derating Factors Ambient Temperatre Derating Factor breakers mst be derated for 4 C 1. ambient temperatres above 45 C.95 4 C. (If MicroVersaTrip programmer is sed, the pro 5 C C.84 (MicroVersaTrip Maximm) grammer ambient is limited 6 C.77 to 7 C.) 65 C.71 7 C.63 Table 29.2 Altitde Correction Factors Meters Altitde Feet Rating Correction Factor Continos Crrent Voltage 2 66 (and below) Table 29.3 Interrpting Capacity Mltiplying Factors for Power Factor Lower than Test Vales System Short Circit Power Factor Dfo System IR Ratio Mltiplying Factor lor Breaker Short Circit Rating Unfsed LVPCB Fsed LVPCB www. ElectricalPartManals ElectricalPartManals. com com

31 Table 3. 1 Crrent Sensor Ratios.. J Breakers <D Sensor Ampere Rating Sensor Trns Ratio AKR-3S AKR-3, 3H AKR-5, AKRT-5H Fixed 15 75:1 8 4:1 16 8:1 2 1:1 Fixed AKR :1 AKR-1 4 1:1 CD See Table 28.2 page 28 for applicable sensors., 3 www Secondary Otpt Crrent at Rated Inpt Crrent 2 ma 4 ma www. ElectricalPartManals. com com

32 l l lable 31.: Gold-Shawmt -- E t..:j - A K R'. r- 3 Fse Class r-sed!: reaker -se c ross Reference Ampere Rating Obsolete General Electric cat. No. Gold, Inc. Eqiv. Cat. No. 15 GF8B15 A4J J GF8B6 A4J6 61 GF8861 A4BY L BG GJ BG (i) BG (i) STD GF8B25 A4BY25 25 SPEC GF9F25 AK A4B25 GE 3 GF8F3 A4BY3 4 GF8F4 Sffix or type BG denotes ct-ot on tang. Used on TAKBSS2 fse carriage. Not class L fse - this is a special "limiter" in size Used on TAK9SS2 fse carriage. and electrical properties (has only short circit protection). Ta ble 31.3 Allowable Fse Sizes Maximm Breaker Frame Rating Plg Gold-Shawmt Type Size Rating Class "L" Fse Size 45 AKU-25 6A 6A and Below 12A AKRU-3, 3S AKRU-5 8A 16A 8A 7A 6A 4A 3A 225A and Below 16A 12A 1A BOOA 7A 6A 5A 4A and Below 16A 16A 16A 16A 16A 16A 25A 25A 25A 25A 25A 25A 25A 25A AKRU-75 32A 32A and Below 3A \.\ \ \ QQQ and Be\ow 41\ General Electric Type J and L fses are now obsolete, and no longer sed in type AKRU low-voltage power circit breakers. Gold-Shawmt fses are now sed. The chart cross-references the obsolete GE catalog nmber and the replacement Gold-Shawmt catalog nmbers. Table 31.2 Gold-Shawmt - GE Special "Welder" Limiters for AKRU-3, -5 Circit Breakers Ampere RaHng Obsolete GE Cat. No. Gold, Inc. Eqiv. Cat. No. 8 GF3W8 A4B8 1 GF3W1 A4B1 BG 12 GF3W12 A4B12 BG 16 GF3W16 A4B16 BG 2 GF3W2 A4B2 J The "limiters" are identical in size to the standard class L fses; however they provide only short circit protection. No overcrrent protection is provided. Sffix or type BG denotes ct-ot on fse tang. Minimm Gold-Shawmt Class "L" Fse 8A 1A 8A 8A Minimm Gold-Shawmt Class "J" Fse 3A 6A 4A - 3A www. ElectricalPartManals. com com 25A 16A 1A 8A 7A 2A 2A 3A 6A 5A 45A

33 Otline Drawings Contined AKR-( )S 5 Manal TM\So 'T'&JitM1"" l$ti.i'tt'i.d 1> f'ii:m.&. D.L M,.UK.!.R lollf --.ve&&& lltl'l I AKR-( )S 5 Electric... AUILI.t.ll:'( Sir.(\ ::;,o"!=or A \ Qo(E. C::...KA.I<G - 14" -;:olit :o:,,nc.,..j o. -r!orol(.f_ c...ucg. www. ElectricalPartManals. com com

34 fl. 5 RACOMMUtOE.O I'IIONT COV.R CUTOUT ' r '' 5 [lectn:: I- LOO I fl. 2. CUSTOMEP,.S - FQo.,&T '::OVE.'t -(4). 7" DIA. MT. HOI.fS -SPR.I'1 CHAR.G.E. IDIC.'..TOR. T I Fl. I Fi(i. I -! 17.,38 6. "J',."Jo 'EilT. I 2 3 i HOR. H R. VERT. HOR. H R. VE.RT. (8).' HOLES [ PR. STUD HOR. - : OWfR.. ST\JO VE.R.T.) IS FRNISHED UNLESS Oit-!E.R,WISE SPeCifoiE.D r t 4. J1L Lsa ' "5-1 I- DR I Ll\N FOR. -'LL STUDS www. ElectricalPartManals. com com 49

35 ----. Otline Drawings Contined Draw Ot Breaker Sbstrctre Drawings Sbstrctre otline drawings shown are for breakers with MicroVersaTrip RMS-9 trips. Refer to page 57 for a complete list of other otlines available. (AKR-38) '---- f-- (1) HOlE LOCATIONS FOR ' I.TS NOTE I (see J / ' STRAP :1 \ oo l"- '=" (8).<37. MOUNTING HOLES r"""" -562HOUS 1. T NOTE #1-TtESE POSTS M' BE RE11MD TO AllOW 8lJirG lilt TO VEATICAL ST!U.CTUAE F llfbifid. NOTE #2--PEN VBmL.RlON N A REOUIRED TOP ANO IIOlltlll. F PEIIRlRRBl, MUST CINWN45 JP OPENWA. www. ElectricalPartManals. com com """

36 ... = i.,. "T"CONNECTOR.S (fori(o&2 A. UNITS) 2-2S C1' 4kC. 1/SCilUfl'+'t:.r...,_S.IT/.14/ C/.eK.e....Z'I'SC<I!)N#Et:.T www. ElectricalPartManals. com com.pfi!)$/t/d.a/ -- 51

37 Otline Drawings Contined AKR-75, ! lS < r---/. J8 1(4)..!1 J(.I/1!!1-""T'l:F $. J.:!i:J -- I p T L ---:: I.:=== I.::. -::: ::.-::. 4f z,zj 1 " : --t:-=t_ ----<= = [JI w-- tj;:roi..l /f. t:. $Z at/rnovt,5-i'ea.i:'c /N.STAI..t.CO. I ---, ee. c-oo &1 Ll /4.1 L /. R COMA?EN4fi? eqe' www. ElectricalPartManals ElectricalPartManals. com com

38 Otline Dimension Drawing Nmbers Dimension Drawing Draw Ot Dimension Drawing Te AKR Nmber Sbstrctre Nmber AKR-6D-3S Manal, Electric 139C5317 TAK1SR1 75C AKRU-6D-3S Manal, Electric 139C5318 TAK1 SR1 F 75C AKR-6s-3S Manal, Electric 139C5319 TAK1SR2 75C AKR-6-3 Manal 139C4976 TAK1SR2F 75C AKR-ND-3 Manal 139C4976 TAK3SR1 139C51 SH1,3,4 AKR-6D-3H Electric 139C4975 TAK3SRH1 139C51SH1,3,4 AKR-ND-3H Electric 139C4975 TAK3SR1D3 139C51SH1,3,4 AKRU-6-3 Manal 139C498 TAK3SR2 139C51 SH2,3,4 AKRU-6-3 Electric 139C4979 TAK3SRH2 139C51SH2,3,4 AKR-6S-3 Manal 139C573 TAK3SR2D3 139C51 SH2, 3, 4 AKR-NS-3 Manal 139C573 TAK3SRF2 139C51 SH2,3,4 AKR-6S-3H Electric 139C574 TAK5SR1 139C51 SH1,3,4 AKR-NS-3H Electric 139C574 TAK5SRH3 139C51 SH1,3,4 AKR-6-5 Manal 139C4978 TAK5SR1 D3 139C51SH1,3,4 AKR-ND-5 Manal 139C4978 TAK5SR2 139C51SH2,3,4 AKR-6D-5H Electric 139C4977 TAK5SRH4 139C51SH2,3,4 AKR-ND-5H Electric 139C4977 TAK5SR2D3 139C51SH2,3,4 AKRU-6-5 Manal 139C4982 TAK5SRF2 139C51 SH2,3,4 AKRU-6-5 Electric 139C4981 TAK6SRH1 139C51SH1,3,4 AKRU-6-5 Manal 139C4984 TAK6SRH2 139C51SH2,3,4 AKRU-6-5 Electric 139C4983 TAK8SS2 139C4595SH 1, 2 AKR-6S-5 Manal 139C575 TAK8SS23 139C4595SH 1, 2 AKR-NS-5 Manal 139C575 TAK9SS2 139C4595SH1,2 AKR-6S-5H Electric 139C576 TAK9SS C4595SH1,2 AKR-NS-5H Electric 139C576 AKRT-6D-5H Manal 139C4978 General Prpose Enclosres AKRT-ND-5H Electric 139C4977 AKR-3, AKR-5 245C764 AKRT-6S-5H Manal 139C575 AKR-75, AKR C352 AKRT -NS-5H Electric 139C576 AKR-6F-75 Manal 139C4572 Fse Rollot Element AKR-NF-75 Electric 139C4573 TAK83FCB 139C4584 AKR-6s-75 Manal 139C456 TAK94FCB 139C4585 AKR-NS-75 Electric 139C4563 AKR-6F-1 Manal 139C4574 Fse Rollot Sbstrctres AKR-NF-1 Electric 139C4575 TAK8SS2FC 139C4898 AKR-6S-1 Manal 139C456 TAK9SS2FC 139C4585 AKR-NS-1 Electric 139C4563 Metering CT's AKR-2-3 Manal 139C L693G1-343L693G12 193A1253 AKR-ND-3 Electric 139C5 Netral Sensors AKR-2S-3 Manal 139C573 TSVG33B - TSVG62B 139C516SH1 AKR-NS-3 Electric 139C574 TSVG83B - TSVG94B 139C516SH2 AKR-2-5 Manal 139C4997 AKR-ND-5 Electric 139C4998 Sbstrctre Accessories AKR-2S-5 Manal 139C L691 G1 T -Connector 139C4455 AKR-NS-5 Electric 139C L671G1 4 in. Wire Disc. 192A994 AKR-2F-75 Manal 139C4572 AKR-NF-75 Electric 139C4573 AKR Manal 139C456 AKR-NS-75 Electric 139C4563 AKR-2F-1 Manal 139C4574 AKR-NF-1 Electric 139C4575 AKR-28-1 Manal 139C456 AKR-NS-1 OOD Electric 139C4563 www. ElectricalPartManals. com com 53

39 Weights and Formlas Ta ble ShiPPing We1ghts i\t)s 1 :-- -- Draw Ot Net Shipping Breaker Element Manal Electrical Manal Electrical AKR-3S 7 AKRU-3S 9 AKR-3 2 AKRU AKR-5 21 AKRU AKRT AKR AKR-1 (25" wide) AKR-1 (33" wide) Kilowatts.kVA Wanted Horsepower r- (;rrni..i Amperes from kva Amperes from kw Amperes from Hp KEY 54 E = Volts I =Amperes % Elf. = Percent Efficiency PF = Power Factor J! ' Alternating Crrent Single Phase I E PF 1 I E -- 1 I E % Eft. PF 746 kva 1 E kw 1 E x PF Hp 746 E %Eft. PF., \r d' '!.- Two Phase, For Wire l x E x 2 x PF - 1 I E 2 1 I E 2 % Eft. PF 746,, kva 1 2 E kw x 1 2 E PF Hp E % Eft. PF ;p -- s Direct Three Phase I E 1.73 PF CUrrent I E 1 1 I E 1.73 I E 1 1 I E 1.83 % Eft. PF I E %Eft kva 1 kva E E kw 1 kw E PF E Hp 746 Hp E % Eft. PF E% Eft. www. ElectricalPartManals. com com

40 Circit breakers are designed primarily to perform the fnction of circit interrption nder shortcircit conditions. Nevertheless, modern circit breaker mechanisms are capable of many operations nder fllload operation and in-rsh conditions sch as encontered in motor starting appli- Ta!Jie 55.' Circit Breaker Frame Size (Amperes) (A) Servicing consists of adjsting, cleaning, lbricating, tightening, etc., as recom mended by the manfactrer. When crrent is interrpted, dressing of contacts may be reqired as well. The operations listed are on the basis of servicing at intervals of six months or less. (B) When closing and opening no-load. (C) With rated control voltage applied. (D) Freqency of operation not to exceed 2 in ten mintes or 3 in an hor. Rectifications. Indstry standards have been established tor the minimm performance which is indicated in the table below. With adeqate maintenance, GE breakers can be expected to exceed the standards. Power operated circit breakers, when operating nder sal service conditions, shall be capable of operating the nmber of times specified in the following table. The operating conditions and the permissible effect of sch operations pon the breaker are given in the following lettered paragraphs. For each colmn, all paragraphs listed in the Nmber of Nmber of Operations Operations Nmber of Related Continos No-Load Operations Crrent Closing and Between Switching Opening Servicing (A) (C) (D) (E) (A) (B) (C) (D) (F) (G) (H) and (J) (E) (F) and (G) ers or other axiliary devices may frther limit the freqency of operation. (H) When closing and open- ing crrent p to the contin- os crrent rating of the circit breaker at voltages p to the rated maximm volt- age and at 85% of the power factor or higher. (E) Servicing at no greater intervals than shown in second colmn above. (F) No fnctional parts shold have been replaced dring the listed operations. tional part replacement and general servicing may be necessary. (G) The circit breaker {I) When closing crrents shold be in a condition to p to 6% and opening carry its rated continos crrents p to 1% (8% crrent at rated maximm power factor or higher) of the voltage and perform at least continos crrent rating of one opening operation at the circit breaker at voltrated short-circit crrent. ages p to the rated maxi- After completion of this mm voltage. series of operations, fnc- When closing crrents colmn heading mst be given consideration. This standard applies to all parts of a circit breaker that fnction dring normal operation. It does not apply to other parts, sch as overcrrent tripping devices, that fnction only dring infreqent abnormal circit conditions. Nmber of Operations In-Rsh Crrent Switching (C) (D) (E) (F) (G) (I) and (J) p to 6% and opening crrents p to 6% (5% power factor or less) of the continos crrent rating of the circit breaker at voltages p to rated maximm voltage, the nmber of operations shown shall be redced to 1% of the nmber listed. (J) If a falt operation occrs before the completion of the listed operations, servicing is recommended and possible fnctional part replacements may be necessary, depending on previos accmlated dty, falt magnitde, and expected ftre operations. www. ElectricalPartManals ElectricalPartManals. com com 55

41 .... Transformer Short Circit Crrent Crves Fig Transf: 5kVA, 28V, 4.5%Z 3, -- w : w Q_,. 2, <( t- " f t- f-- --t- - : P : -- ::> '-' c-- >::: --f- " ::> 1,,oct '-',.o'\o : <' "_\f--o\ f-of-' f--- '6 <},. f- 1- : k-- C},. 1-' 1, j! --' <( '-' " : " 5, " w,. " " I", I DISTANCE IN FEET FROM TRANSFORMER TO PO INT OF BREAKER CONNECTION Fig Transf: 5kVA, 48V, 4.5%Z Fig Transf: 75kVA, 28V, 5.75%Z 56 45, <n 4, -- Q. 35,- f- 3, ----r-- t o: => 25, ::> 2, f---- f Cl:,;:; -" <i er f- ::> Ci 15, f-- I, f--- 5, CC' 5 IQ(J 2l'::"_!O 5 r- - -r-r 1-..:.-=:::t= t-t - t t= :--- f-- -J:=:t= j t-:1=='- - j- "s.----;= j:= 5 1 zoo DISTANCE IN FEET FROM TRANSFORME R TO POINT OF BREAKER CONNECTION Fig Transf: 5kVA, 24\i 4.5%Z 35, UJ :!', Q. ::> 3, <( 2, 2 Cl: 15, f I 1, 1- --' <( 5, ::> I 2 5 I 2 5 I 2 5 DISTANCE' IN FEET FROM TRANSFORMER TO POINT OF BREAKER CONNECTION Fig Transf: 5kVA, 6V. 15, UJ 5 Q_,. <( 12, 1- z w : : ::> 9, f- => f- r -" <l ii f- 6, 3, f- -r- I I H- tt 1J - f'::: - -t I I l II II I 1.5%Z I' ;;--,... >.,. "" "!> 1- - (' "<; ".._ 1\: <" \ r\,, " _ t- t-- 5 I DISTANCE IN FEE T FROM TRANSFORMER TO POINT OF BREAKER CONNECTION Fig Transf: 75kVA, 24V, i.75%z 3 4-:J,oorJ Q. <i ": <i 35,, 45,C I-,- =t- r:::l, II. : _L f='.::± lf IOC DISTANCE IN FEET FROM TRANSFORMER TO POINT OF BREAKER CONNECTION www. ElectricalPartManals ElectricalPartManals. com com

42 _... Fig Tr ans: : if> w 22, w.. ;,; 2, <t ;;!: 18, z w 16, ::> 14, ::> 12, 1, r _J <t " w ;,; ;,;,.. 24, 8, 6, 4, 2, - Fig Tr an:: i [ij w.. :1 5, <l t- z w 4, ::> '::: ::> 3, i3 t- 2poo (/) _J <t ii' 1, t- w,.. (/) 5kVA, 48V, 5.75%Z --..:::t--- " 1 2 \. so 1-o o 1- m.. '4, \. 1\. r- ('.,. 'S><" " v '> '\.o oo '4, \. \. I" \. \. \. \. \. -..., I 2 5 DISTANCE IN FEE T FROM TRANSFORMER TO POINT OF BREAKER CONNECTION ' DISTANCE " loookva, 28V, 5.75%Z IN FEET FROM TRANSFORMER TO POINT OF BREAKER CONNECTION Fig Tr an ; 1kVA, 48V, 5.75%Z t- z w 2, ::> '::: ::> :I: _J <t " w ;,; ;,; 3, (/) w w..,. 25, <l 15, 1, 5, f-- - \rv <:.. o \ 'S><" o'\ '-'so c--1\.,. 1s><" -t,. " - - f- "\. "\. 1"\. I DISTANCE IN FEET FROM TRANSFORMER TO POINT OF BREAKER CONNECTION '-... Fig Tr ansf: 75kVA, 6V, 5.75%Z if> w 16, w.. ;,; <t ;': 12, 3 '::: IB,OOO 14, :::: ' 1, ::> 8, r 6, if> _J <t 4, ii' w ;,; ;,; 2, -- if> '>s " 1--- I'- '; -zo's sao 1,_ o 1,. 1o c.,. (' (' 'S><"\ '\ \ '\. \ \ f- r--...: - f--- _-,. \. '\. r-f- 1"- " 1\. " -..._ - r- DISTANCE IN FEET FROM TRANSFORMER TO POINT OF BREAKER CONNECTION Fig Tr ansf: 1kVA, 24V, 5."/5%Z z w 4, ::> _J <t " t;; ;,; ;,; 6, w w..,. 5, <l t: ::> 3, : : 2, :I: 1, DISTANCE 1"\.. 1\.. to v - 1l <, r--o.. '_:. b).o) goc:.,'- <" " "\. ' ' IN FEET FROM TRANSFORMER TO POINT OF BRE AKER CONNECTION Fig Tr ansf: 1kVA, 6V, 5.75%Z "" w 22, 5.. 2, ;,; r-- <t ;;!: if, cr 3 '::: ::> cr cr I _J <l ;,; ;,; 24, r , f , 14, f--i-- 12, , -- :::) 8, 6, , , f- r " ' f- f f t-- t-- b. _., " > <", 1- :.r%.,_ c.,. s o f---1- o t '-c:., " _\ \. t- - - It - - I r-- - -f-- \. \. \. _::.., "..., '..._ ? 5 DISTANCE IN FEET FROM TRANSFORMER TO POINT OF BREAKER CONNECTION www. ElectricalPartManals ElectricalPartManals. com com 57

43 ...,_..... Transformer Short Circit Crrent Crves Contined Fig Transf: 151\VA 9, 1 <f) 1 8, a. lr- o- <t '\ t:::---- 7, \ )'-. > z 6, 1\. :::> C: 5, :::> G 4o,ooo - 3, <f) r-- _J 2, - IOPOO " 35/JO <t z - 3.!5 25, a 2opoo 15, J: <f) :;i 1, ii - " I : \ I \ \\ II '\ \ I -j)<" '\ '< \_'\ I\ -', f DISTANCE 5, IN FEET FROM TRANSFOR MER TO POINT OF BREAKER CONNECTION f DISTANCE IN FEET FROM TRANSFORMER TO POINT OF BREAKER CONNECTION Fig Tra nsf: 2kVA, 48V, 5.75%Z 58 a. 5, f DISTANCE IN FEET FROM TRANSFORMER TO PO INT OF BREAKER CON NECTION 3, <f) c-- UJ 5 8, f--- a_ " <t E 7, 1--, I" z 1\. sopoo ::J 5, 3 i 4poo > 3, <f) _J ;3 2, 1\ I i.75%z i< 1, )'-. " " i'-... i:; r _J <t w " <f) 3, <f) cr UJ a. 25, <t "" z UJ cr 2, cr :::> - :::> 15, cr 1, :: <f) I I l J...! l...,_ )'-. I', f...l " 1\ -1 [\ 1o - - t--,. 1\ \ % " <" \ 1\.! Dl STANCE IN FEET FROM TRANSFORMER TO POINT OF BREAKER CONNECTION 5, -... " " " J t;,. I '\ ':i.75%z \ :. \ / '\ 1--- f--- II 1\. - II )' li!'--.. f' r-- -- O II 5 I f--... r-...!'- 1"- t-t- '\ 1' DISTANCE IN FEET FROM TRANSFORMER TO POINT OF BREAKER CONNECTION Fig Tra nsf: 2kVA, 6\ i.75%z vo w e5 4, a_ " <t 35, > z :>' 3, cr ::J - 25, :::> 2, f.--.;:; 15, 1--- _J j 1, " V) 5, f::-- 2 I 2 5 I DISTANCE IN FEET FROM TRANSFORMER TO POI N T OF BREAKER CONNECTION www. ElectricalPartManals ElectricalPartManals. com com