GE AKR-3-50, Maintenance Manual

Page 1: ...GEK 7310A Includes Supplement GEI 86134 MAINTENANCE MANUAL LOW VOLTAGE POWER CIRCUIT BREAKERS TYPES AKR 3 3A 50 AND AKRU 3 3A 50 mpfjK fSt fca E GENERAL ELECTRIC Courtesy of NationalSwitchgear com ...

Page 2: ...ions General Arranging the Breaker for Slow Closing Lubrication Replacement and Adjustment of Components and Accessories Mechanism Figs 12 13 and 14 Mechanism Replacement Figs 15 and 16 Latch Adjustment Manual Handle Adjustment Contact Maintenance Contact Replacement Fig 17 Contact Adjustment Components and Accessories Auxiliary Switch Fig 18 Shunt Trip and Undervoltage Device Figs 19 and 20 Maint...

Page 3: ...e of the quick make quick break description having the feature of storing energy in a closing spring for quick re lease in closing In closing some energy is trans ferred to an opening spring to be used subsequently for fast tripping Fig 1 8041849 AKR 50 Manual breaker Individual breakers may vary in how they are mounted how they operate how they are applied and in other categories as shown in Tabl...

Page 4: ...d gen eral purpose drawout breakers since their enclos ures must be modified to provide the extra space required for the fuses The mechanism unit is designed to receive en ergy store it and later when called upon to do so deliver it to close the breaker s contacts It must be able to reverse its commitment to close the breaker at any point upon the activation of an auto matic trip device i e be Tri...

Page 5: ...immediately in its permanent location If this is not possible the following precautions must be taken to insure the proper storage of the breaker BREAKER OPERATION screw is turned in an internally threaded trunnion supported by a centrally located crank on the crank shaft The power screw or jackscrew is turned by means of an external handle in the form of a crank This has on its end a square socke...

Page 6: ...osition is reached If the control circuits are energized and the breaker is electrically operated the motor will run when the secondary disconnects engage This will occur on about the third turn of the handle The motor will run charging the closing spring until the cut off switches are actuated Slots in Rail Trip Button Racking Shaft Arms Housing Racking Pin Rail Latch Link Racking Position Indica...

Page 7: ... cable must also be supported adequately to resist these forces Points of support for buswork or cable must be close enough to the breaker so that no appreciable strain is imposed on the breaker s studs 2 Engage the racking handle and crank in a counterclockwise direction i 3 Approximately 18 1 2 turns of the handle will complete the racking out operation and bring the breaker to the disconnected ...

Page 8: ...e drawout equipment compartment 2 Remove the arc quencher from each pole and examine it for the possibility of broken or missing parts Do not replace the arc quenchers until after the preliminary examination is completed 3 Charge the closing spring If the breaker is manually operated turn the handle counterclockwise as far as it will go 140 degrees then reverse the motion and return it to the vert...

Page 9: ...7310A 3 Breaker Position Interlock 2 Clamp Screw 1 Arc Quencher Clamp Fig 4 8041848 Breaker with harriers and arc quenchers removed i Fig 5 8041831 Using maintenance handle to turn camshaft 9 ns Courtesy of NationalSwitchgear com ...

Page 10: ...ired by Industry Standards and Certifying Authorities others are optional and intended only for special applications The standard interlock devices described in the fol lowing paragraphs are used only on drawout break ers Stationary breakers have no required inter locks 6 Roller on Ratchet 7 Closing Spring 8 Adjustable Link 9 Blocking Plate 10 Sliding Cover 1 Racking Arm 2 Crank 3 Lever 4 Spring R...

Page 11: ...less this cover is moved the drawout rack ing handle cannot be used Locking is accomplished by link 2 Fig 8 which moves down into a notch in the cover in response to the main shaft being in the closed position On all breakers it is possible to use padlocks to lock the breaker open by placing the shackle of the padlock through the trip button hole and out the slot in the side of the escutcheon This...

Page 12: ...s sembly is away from link 6 and the torsion spring causes pin 3 to move into the path of the lock s bolt which cannot then be extended SHUNT TRIP The shunt trip device opens the breaker when its coil is energized An A auxiliary switch which is closed only when the breaker is closed is in series with the device coil Connections are made to the external tripping source through sec ondary disconnect...

Page 13: ...ndervoltage device may be tied or wired down so that it will not cause tripping No more than one undervoltage tripping device should be used in conjunction with one static time delay unit MAIN SHAFT BREAKER CLOSED The static time delay undervoltage can also be furnished with a thermotector control unit as shown on wiring diagram Fig 22 Overheating of motor windings causes the thermotector imbedded...

Page 14: ...s are opened or closed as the breaker is opened or closed B contacts are the reverse of this Drawout breakers have their auxiliary contacts wired to secondary disconnects stationary breakers may be wired directly to the switch terminals The bell alarm circuit may be turned off by pushing in the manual trip or by energizing the shunt trip In the latter case a normally open contact of the bell alarm...

Page 15: ...d How frequently an inspection is made of an individual breaker will depend on the circumstances of its use It would be well to inspect any breaker at least once a year If it is frequently operated or installed in an area of high humidity or a dusty dirty atmos phere the frequency of maintenance inspections should be increased Under extremely bad condi tions inspections might be monthly ARRANGING ...

Page 16: ...e bearing Closing the breaker slowly while observing the action of the mechanism and contacts is a good way of judging the correctness of mechanical and contact relationships Some of the maintenance procedures described later will involve operating the breaker in this manner On drawout breakers the contact surface of the disconnect studs should be greased with GE Grease Specification D50H47 REPLAC...

Page 17: ...g 13 Main Shaft 14 Secondary Latch 15 Opening Spring 16 Manual Adjustment Link 15 12 IQ O o yuc o 10 o n T mr 13 J o o 6 16 8 4 3 2 5 14 Fig 13 108D8130 Manual mechanism T R I P P E D R E S E T 10 Trip Shaft 11 Trip Latch 12 Insulated Coupling 1 3 Main Shaft 14 Secondary Latch 2 Prop 3 Cam 4 Camshaft 5 Cam Roller CLOSED Fig 14 108D8132 Mechanism 17 Courtesy of NationalSwitchgear com ...

Page 18: ...of the gearmotor turns the camshaft by caus ing the driving pawl to reciprocate advancing the ratchet wheel If a general overhaul involving extensive com ponent replacement is undertaken it may be con venient to separate the major breaker sub assem blies as shown in Fig 15 If this is done the secondarydisconnect assemblies should be removed first i Fast cam action occurs when the closing spring go...

Page 19: ...The end pieces on the springs 9 have a small hole for the purpose of engaging a spring puller having a wire diameter of 1 16 inch When the spring is pulled while holding the contact it may be lifted off the end of the contact A contact is replaced by hold ing it in position with its inner end behind the con tact stop and extending and engaging the spring on the outer end of the contact MANUAL HAND...

Page 20: ...istance between the point of contact on a stationary contact when the breaker is open and the position of the same point when the breaker is closed Af since the contacts over travel a sliding or scrubbing action to the contacts in motion 1 The breaker mustbe open and the arcquench ers removed 2 Place a thin sheet or strip of tough insulating material suchas mylar over the stationary arcing and int...

Page 21: ...acement switch should have its crank shaft set so that the arrow head on the end of the shaft points as shown in Fig 18 when the breaker is open is used it is always the case that the first two stages nearest the crank have the B contacts to the front and the A contacts towards the back A contacts are closed when the breaker is closed B contacts are closed when the breaker is open If a switch is a...

Page 22: ...is fastened by two of the hex head bolts 8 used to fasten the buffer assembly to the breaker frame If the second device added is an undervoltage device a new buffer assembly block will be sup plied This is required for clearance In this case the buffer assembly must be taken off disassembled and remounted together with the number two under Replacement If it is necessary to replace or add one of th...

Page 23: ...reasonably tight If they are then bend the trip paddle on the trip shaft to slightly reduce the dis tance between the trip arm of the device and the trip paddle and recheck for positive trip If this bending isnecessary be careful that it is not over done Adjustment When these devices are installed or replaced their positive ability to trip the breaker must be demonstrated This is done on the shunt...

Page 24: ...d c b 125 volt d c 177L316 G 14 50 volts d c c 250 volt d c 177L316G 15 100 volts d c When the undervoltage device is closed and the breaker mechanism is reset there must be clear ance betweenthe trippaddle and thedevice armature MAINTENANCE OF STATIC DELAY DEVICE FOR UNDERVOLTAGE FIGS 21 AND 22 L l 3 Theresistanceof the undervoltage coilsare as follows In the event the device fails to pick up the...

Page 25: ...SET TO CHECK CONTINUITY OF BRIDGE CIR CUIT IN STATIC TIME DELAY BOX ONLY A VOLT OHM METER OR VACUUM TUBE VOLT METER SHOULD BE USED i CLOSING SWITCH r 1 CLO EE I ft x n t G D 2 i X TF F i G ELECTRICAL CONTROL COMPONENTS FT w Figure 23 shows the connections tor control components on electrical breakers with the breaker open and the relays de energized The application of voltage causes the motor to r...

Page 26: ...he solenoid from the bracket The pin connecting the armature to the closing link must also be removed The ratchet on the camshaft isremoved by driv ing out the roll pin which fastens it to the camshaft Before this can be done the gearmotor and pawls must be removed and the closing spring arranged for slow closing as described earlier Turn tfyej camshaft using the maintenance handle until the roll ...

Page 27: ... LOCKOUT FIG 26 In Fig 26 the bell alarm device is shown with its components in the positions they will be in with the breaker closed Fixed centersin the mechanism are shaded solidly centerswhich are cross hatched are fixed only in the reset position When the breaker opens the crank pin 1 Fig 26 pushes against the alarm link 2 which closes against the belLalarm switch buttons 3 If a lock out link ...

Page 28: ...trunnion movement at the other extreme point of its travel The trunnion is against the jamb nuts when the breaker isfully racked in and against the sleeve when fully racked out DRAWOUT MECHANISM AND INTERLOCKS The drawout mechanismsubassembly isshown in Fig 27 It is mounted onthe bottom of the breaker front frame as shown in Fig 28 The bearing sup ports 4 Fig 27 are fastened to the sides of the br...

Page 29: ...t mechanism subassembly AKRU 50 FUSED BREAKER With the exception of having integrally mounted fuses on the upper studs and an open fuse lockout device AKRU 50 breakers are in allother respects the same as general purpose AKR 50 breakers Fuses which may be used on these breakers are tabulated in Table 3 TABLE 3 Melting Time Current Curves Outline Cat No Cl Rating 846C0826 1 846C0826 2 846C0826 3 84...

Page 30: ...e left breaker pole requires replacement note that this fuse is mounted differently This pole is on the right when viewing the breaker from the rear On this phase the fuse is rotated about its axis 180 degrees and the tang of the fuse is mounted beneath the breaker stud The tangs of these fuses are offset with respect to one another so that this difference does not affect the position of the prima...

Page 31: ... on use of the POWER SENSOR Test Kits PST land PST l l are provided in publication GEK 7301 The tripping rod 5 should be set so that any solenoid will cause the breaker to trip before the solenoid armature closes against its magnet This can be checked by moving each armature towards its closed position and noting that tripping takes place at least l 32 inch before travel ends The POWER SENSOR is a...

Page 32: ...rotection a ground fault sensing function may be provided The Ground Fault function operates on the principle that the instantaneous values of current in the three conductors or in four conductors on four wire systems add to zero unless ground current exists Therefore if the electrical system is a four wire wye system with the neutral grounded at the trans former the fourth sensing coil Fig 34 mus...

Page 33: ...Polarity Dot i i I CENTER POLE I it I I R I I Fig 34 8039650 Ground sensor coil Remotely located COMMON NEGATIVE L RIGHT 1 4 POLE 20 V 4 D C REF TO SCR ANOOE T 1 W 4 TEST 1 N I 1 I TS I I TEST TB I I A A 4 When malfunctioning of the POWER SENSOR Trip is indicated the trouble should be traced to one or more of these four components involved and that component should be replaced as a unit The follow...

Page 34: ...en them See Fig 37 With the breaker restored to service and with the ground fault thus de activated establish whether there is false tripping due to overcurrent 3 Temporarily connect jumper from shield to either terminal at remote CT and check to assure the shield is continuous from Logic Unit Plug to re mote CT by checking for continuity between R and A If continuity does not now exist shield is ...

Page 35: ...RTV9II fo T C NW c SCL QTBD in 11 2 5 4L IV a LM U I i I pews 1 a HtfSDft CoiL I a i 41 2S t XE i a i I bL W U rrn N i a c rr T l I a z i m mRSLi 1680 If Tea tTf FT a si u I jd r BREAKER I OUTLINE I a f J si ft 4 U Sj CROUNo sENSOR v eoo eCT l a5 PM r o 5rj rtcM Y KE KE A I 1 t A a LOAD XYJIRE SYSTEM TYPICAL GROUND FAULT CONNECTIONS ISREnRsc CAfli M FIFEOOMDSENSOR DISCONNECT AMO CATERWAL GROUNC fe...

Page 36: ... bracket This will free the coil and magnet subassembly Adjustmentsare madeby meansof the two adjust ing screws shown in Fig 38 Adjusting screw 1 controls the opengapof the devicearmature dimen sion B This should be set at 1 4 inch To reduce the possibility of damaging the equip ment andto provide maximum safety to the operator the overloadcaused by a fault isremoved in a mini mum amount of time b...

Page 37: ...5 1 SS J 3 4 j 7 4 1OX 4 IW J 10X s A j Mm N iiiki rA j A MB A m i I s s 4Si j z u v c S 4 h A S b V s Mmlmm TBMI CtuHiif HIM AK PO AK 3S AK 73 AK 100 3 YV s I v x S s s s 1 Min Si 5 L IA III r 1 7 Hurt Urn jjlty Will 7 7 Z 2 T r 7 7 J C j AppUcatiin AIIMIMB wd a cvrvf Z M X S y IIMBBMI Unit 7 7 Z s Z0 7 M Ld 1 i mil m M M 71BBBB Hr I M M I N n 4i m m M I IJ HI II iTMiM i I 4 I I H i m m m m ii m ...

Page 38: ...n M o 8 114 N IA 10 4 2 20 7 9 4 f 1 1 J t J 7 7 0 J A 9 J M 1 1 M M 2 M M M M b I J 1 1 1 u m l I 4 I 4 T I t l4 J 4 1 H I 7 I 1 I I nil L 4 0 0 7 t illl l t T i l l I I T CURRENT IN MULTIPLES OF GROUND TRIP SITTING 109HL689 Ground fault short time delay time current curves for Power Sensor solid state trip device Pig 40 38 Courtesy of NationalSwitchgear com ...

Page 39: ...m i GENERAL ELECTRIC COMPANY CIRCUIT PROTECTIVE DEVICES DEPT PLAINVILLE CONNECTICUT 06062 ELECTRIC GENERAL T I 4 0 7 830 Courtesy of NationalSwitchgear com ...

Page 40: ...uctions on the AKR breaker models and trip devices listed in Table 1 TABLE 1 Breaker Type Mounting Trip Device Type Frame Size Amp Stationary Drawout ECS SST AKR 4 30 3OH AKR 4A 30 3OH X AKR 5 30 30H AKR 5A 30 3OH X 800 AKRU 4A 30 X AKRU 5A 30 X AKR 4 50 5OH AKR 4A 50 5OH X AKR 5 50 50H AKR 5A 50 50H X 1600 AKRU 4A 50 X AKRU 5A 50 X AKRT 4 50 AKRT 4A 50 X 2000 AKRT 5A 50 X AKRT 5 50 Integrally fus...

Page 41: ... SST Test Set TAK TS1 False Tripping Ground Fault Replacement of Current Sensors Flux Shift Trip Device Cabling Diagrams Ground Fault Defeat Cable 14 16 17 18 19 19 20 22 23 24 Type ECS Overcurrent Trip Device Components Trip Characteristics Cabling Diagram 24 25 26 27 ECS SST Time Current Curves These instructions do not purport to cotor alt details or variations in equipment nor to provide for e...

Page 42: ... models Unless noted to the contrary or otherwise discussed herein the user should continue to employ GEK 7310A as the general op erational information source c Extra insulation on shaft flyweights d Mounts one additional stationary main contact for a total of four otherwise the contact struc ture is same as AKR 30 See Fig 6 NOTE To visibly distinguish it from the AKR 30 the closing springs and ar...

Page 43: ...vable contact arms and pivot block b Stationary main contacts increased from 6 to 8 otherwise the stationary contacts are identical to the AKR 50 See Figs 8 and 9 EXAMPLE An AKR 5A 30 breaker with SST sensor tap set on 100A is rated 100A Short circuit ratings vary with the applied system voltage On 240 V systems they are also dependent upon whether the overcurrent trip device contains an instantan...

Page 44: ...rtments drawout breakers of different frame sizes arenot interchangeable To prevent inserting the wrong typebreaker into a drawout compartment suitable rejection hardware is affixed to each breaker and its compartment Figure 4 shows a typical rejection bracket which aligns with a re jection pin in the drawout rail Fig 3 When the wrong type breaker is inserted into a compartment the bracket and pin...

Page 45: ...e gree clockwise handle stroke or up to four multiple strokes of lesser swing The following adjustment procedures should be performed using the single stroke method By so doing proper multi stroke operation is assured t When contacts are replaced they must be ad justed to ensure that the proper amount of force is developed between the movable and stationary con tacts when the breaker is closed Thi...

Page 46: ...cing contacts and the bottom three are the mains There are no intermediate contacts The contact assembly for the AKR 30H breaker employs the same AKR AKRU 30 configuration but adds a fourth stationary main contact at the bottom See Fig 6 The following wipe adjustment procedure is ap plicable to all AKR 30 types 1 Open the breaker remove arc quenchers 2 Arrange the breaker for slow closing describe...

Page 47: ...aterial such as mylar over the stationary arcing and intermediate contacts This strip should be about two inches wide and must prevent the arcing and intermediate contacts from making contact when the breaker is closed 4 Using the ratcheting maintenance handle slow close the breaker with the insulation held in place Examine the insulation to make sure it Mover hangsM below the intermediate contact...

Page 48: ... contact arm 2 Stationary main contact 3 Stationary intermediate contact 4 Stationary arcing contact 5 Driving link 6 Insulating link I 7 Coupling pin V DRIVING LINK Fig 9 AKRT 50 Movable contact pivot block 9 Courtesy of NationalSwitchgear com ...

Page 49: ...and 50 models Overcurrent trip devices are the same for both types Referring to Fig 17 of GEK 7310A arcing con tacts 1 are released by removing the arc runner 5 and thearcingcontact pivot 6 When reassem bling make sure that the insulating spacers on the ends of the arcing contact pin 7 and the insulating washers 8 under the lower arc runner fastening screws are replaced Intermediate 2 and main con...

Page 50: ... t i i n I i c VI WTT I I I i r I I m Fig 10 Typical mounting for class f f L n fuse on AKRU 30 and 50 breakers ADAPTER BARS COPPER m ga JEBJ v Fig 11 Mounting for 300 350 and 400A Class J fuses on AKRU 30 breakers 11 Courtesy of NationalSwitchgear com ...

Page 51: ... 2 via their holding screw and pulling them upward and out After the keys are removed pull the disconnect assembly off the end of the fuse tang 6 Install the new fuse by reversing the dis assembly procedure Ensure that the mating faces of the fuse and heat sink are clean CAUTION FUSE IN THE LEFT POLE FRONT VIEW OF THE BREAKER NOTE PAR TICULARLY THAT THIS FUSE IS MOUNTED DIFFERENTLY THAN THE OTHER ...

Page 52: ...RONT OF BREAKER FOR THIS POLE ONLY FUSE IS ROTATED 180 TO POSITION TANG BENEATH BREAKER STUD FUSE TANGS POSITIONED ON TOP OF BREAKER STUD BREAKER STUD V V V I 0 0 i V I TANG BOLT HOLES IN USE 2500A FUSE CAT NO GF9F 2500 AK PRIMARY DISCONNECT ASSEMBLY SEE FIG 13 MOUNTS DIRECTLY ON OUTBOARD FUSE TANG Fig 14 Plan view of AKRU 50 breaker showing 2500A fuse tang positions 13 Courtesy of NationalSwitchg...

Page 53: ...ach target pops out when its associated trip element operates to trip the breaker After a trip the popped target must be reset by hand However neglecting to reset does not affect normal operation of any trip element or prevent the breaker from being reclosed Current Sensors each pole mounts a single sensor coil CT which supplies the power and sig nal inputs necessary to operate the trip system Eac...

Page 54: ...e sensors those on the neutral sensor must be correspondingly positioned Flux Shift Trip Device a low energy electro magnetic devicewhich upon receipt of a trip signal from the programmer unit trips the breaker by actuating the trip shaft See Fig 22 All components except the neutral sensor are mounted on the circuit breaker The phase sensors are located on the breaker s back frame The pro grammer ...

Page 55: ...ofL Multiple Multiple of X ofL 4 5 6 8 1 0 1 2 X 3 4 5 6 8 10 L 100 150 225 300 or 300 400 600 800 a AKR 30 800 Maximum 0 30 Intermed 0 165 Minimum 0 065 Maximum 0 35 Intermed 0 21 Minimum 0 095 Maximum 4 5 6 8 10 12 L 6 7 8 9 1 0 1 1 X 22 or 25 3 4 5 6 7 X 300 400 600 800 or 600 800 1200 1600 Intermed 1 75 2 2 25 2 5 3 4 L AKR 50 1600 10 Minimum 4 2 25 3 4 5 6 X 800 1200 1600 2000 AKRT 50 2000 D ...

Page 56: ...h current single phase tests on the breaker using a high current low voltage test set NOTE For these single phase tests spe cial connections must he employed for SST breakers equipped with Ground Fault Any single phase input to the ground differential transformer will generate an unwanted ground fault output signal which will trip the breaker This can be nullified either EQUIPMENT MOUNTED by a tes...

Page 57: ... DISCONNECTED FROM ITS POWER SOURCE ON DRAWOUT EQUIPMENT RACK THE BREAKER TO ITS DISCON NECTED POSITION VERIFY THAT THE BREAKER IS TRIPPED 2 Verify operation of the SST target indicators on programmer units so equipped B Complete Trip Device System For these tests the programmer unit must be mounted on the breaker and connected to its wiring harness Test scope 1 All A tests previously described pl...

Page 58: ...onnected to the source 4 Ensure that the neutral conductor is carrying only that neutral current asso ciated with the breaker s load current neutral not shared with other loads differ 9 e If the precedingstepsfail toidentify the prob lem then the sensor resistances should be measured Since the phase and neutral sen sors are electrically identical their tap to tap resistances should closely agree S...

Page 59: ...rame is coupled to the breaker s trip shaft via a trip rod driven by the actuator arm The actuator is a solenoid whose armature is spring loaded and held in its normal Reset position by a permanent mag net In this state the spring is compressed So long as the actuator remains in the Reset po sition the breaker can be closed and opened norm ally at will However when a closed breaker re ceives a tri...

Page 60: ...uster end 3 Trip paddle 4 Trip shaft 5 Actuator arm 6 Reset linkage Fig 23 Flux shift trip device components TRIP PADDLE IN MECHANISM RESET POSITION TRIP ROD IN RESET POSITION Fig 24 Trip rod adjustment 2 ADJUSTER JAM NUT END O I 25MDIA ROD I 21 Courtesy of NationalSwitchgear com ...

Page 61: ...GRAMMER CONNECTOR AMP 201297 1 LOAD Fig 25 Cabling Diagram SST without ground fault A B C I A A BACK r i J TUHu PROGRAMMER UNIT FLUX SHIFT TRIP DEVICE B RED 48V dc TO SCR ANODE BLACK o I E LEFT POLE CURRENT SENSOR COM WHITE o A l 3 c BLACK 4 o o c A TAP WHITE W o nil b 0 3 F BLACK r 4 o o r i WHITE B O m H S 3 K BLACK 4 o o C I L r s TTT HARNESS CONNECTOR AMP 201298 1 N LOAD PROGRAMMER CONNECTOR A...

Page 62: ...EUTRAL SENSOR 4 WIRE LOAD Cabling Diagram SST with ground fault on 4 wire load Fig 27 BREAKER HARNESS CONNECTOR PROGRAMMER UNIT I GROUND FAULT DEFEAT CABLE CAT NO TGFD 1 i i i o r i 71 B B 0 1 T _ I t o o o 77 CURRENT SENSORS E O 17 Ao A 2 A W II PROGRAMMER UNIT WITH GROUND FAULT ELEMENT C C 0 II D Of o 3 4 B L F F U Lo H O 4 0 1 o r o o H o l 3 4 cL I K K I 4 1 I te l o 3 i i r o I O I C C H O I ...

Page 63: ...ecause there is no Ground Fault function In all other respects the ECS trip device system operates and can be treated identically to SST This includes circuitry size construction com ponent location programmer unit setpoints per formance characteristics operating range quality reliability and the flux shift trip device Use the same troubleshooting and test procedures for single phase high current ...

Page 64: ...pere Rating Multiple Multiple V of L of X 100 150 225 300 400 600 800 3 4 5 6 8 10 L AKR 30 800 Maximum Maximum 0 35 Intermed 0 21 Minimum 0 095 22 or Intermed 300 400 600 800 1200 1600 6 7 8 9 1 0 1 1 X 4 5 6 8 10 12 L AKR 50 1600 10 1 75 2 2 25 2 5 3 4 L Minimum 4 AKRT 50 2000 800 1200 1600 2000 1 Pickup tolerance is _9 2 Pickup tolerance is _10 Time delay shown at 600 of long time pickup settin...

Page 65: ...NODE o BLACK o I E LEFT POLE CURRENT SENSOR WHITE o A C BLACK o o I WHITE A o ik D F BLACK o I WHITE B o H K BLACK o I C i J I 7 N N T T Y HARNESS CONNECTOR AMP 201298 1 PROGRAMMER CONNECTOR AMP 201297 1 LOAD Fig 32 Cabling diagram for ECS Trip Device Fig 33 ECS current sensor 26 Courtesy of NationalSwitchgear com ...

Page 66: ...I I I t l t n i i i s I I I H i i i mil MULTIPLES OF LONG TIME PICKUP L l HOT Short rim dalay b optloool InitantaMow AK AKJt LOW VOLTAGE POWER ORCUfT BREAKERS GES 6032A GENERAL ELECTRIC ECS 1 SOUD STATE JRRENT TRIP DEVICE ncxv Long tima J loy Short tima dolay and Inttawtanaou Tima currant Curvo i i a 7 a a i y a i i nHyiii y currant mux rasny Saftiay Myhar iSn 100 at tha ra wa a a ciwHamm currant ...

Page 67: ...mperes Sensor Tep Setting Amperes 7 7 7 Sreater Type MX MX 7 NN 7 AK AKR 50 1200 1600 14 000 18 000 16 000 20 000 s 7 V 7 AKT AKRT 50 1600 s 2000 j I i i I I I l 4 SS M TSMSSt 9 S IlSli 9 4 I 7 I IS M 9 M 1 M J 1 MULTIPLES OF LONG TIME PICKUP L AK AKR LOW VOLTAGE POWER CIRCUIT BREAKERS GENERAL 4 ELECTRIC GES 6033B ssr SOLID STATE OVERCURRENT TRIP DEVICE Pre ammer Set PsMs X Current Sewer T s Ampsr...

Page 68: ...Z z z z 7 z 7 r K y r r N r 7 7 A 7 7 7 HI l M M M M 82 4 7 l 2 3 J J 1 1 4 J A J 1 1 2 3 4 1 7 t MULTIPLES OF CURRENT SENSOR TAP X MOTl 4 ti wire Ground MWr top muit b tot tomo o pHa toMor top TYPE AKR LOW VOLTAGE POWER CIRCUIT BREAKERS GES 6034A GENERAL ELECTRIC SST SOLID STATE OVERCURRENT TRIP DEVICE Pripmiwwir Sot P mt Cwnmt Sana Tap Ampara 70 100 150 225 70 100 150 225 or 200 300 400 600 100 ...

Page 69: ...r E Ct 5 s 00 r 3 XI X LX 1 07 Ml 07 I M 04 04 03 02 02 02 11 d 4 J J 0 1 4 1 2 I M o VI 4 1 A 2 MULTIPLES OF CURRENT SENSOR TAP X MOTi 4 h wir OrOund rn or tap mu t b Hi of phoM W r tap tom AK AKR LOW VOLTAGE POWER CIRCUIT BREAKERS SST SOLID STATE OVERCURRENTTRIP DEVICE SENIIIALe ELECTRIC GES 6035B Prsgrawmtr Sot Points X Current Straw Tops Ampsros AKT AKRT 50 AK 75 AKR 75 AK AKR 100 Ground Foul ...

Page 70: ... j GENERAL ELECTRIC COMPANY CIRCUIT PROTECTIVE DEVICES DEPARTMENT PLAINVILLE CONNECTICUT 06062 ELECTRIC GENERAL u 6 79 S30 Courtesy of NationalSwitchgear com ...