Masterpact Universal Power Circuit Breaker Catalog
MASTERPACT Universal PowerCircuit BreakerClass 631CONTENTSDescriptionPageIntroduction . 1Advantages . 3Description . 6Control Units . 7Accessories . 23Switch . 36Trip Curves . 37Wiring Diagrams . 42Circuit Breaker Dimensions . 46Appendix . 62
IntroductionStandard Compliancen UL489: MP08 to MP50 circuit breakers and their accessories are Listed under UL files E63335,E103955 and E113555n UL1066/ANSI: MC08 to MC50 circuit breakers are UL Listed according to UL1066 (ANSI C37-13)under file E161835n International Standards: the MASTERPACT circuit breaker has been designed to meet all themajor standards including:IEC 947-2 and related standards such as VDE, BS, EN, etc.o JEC, JISn UL 1008: MP12, MP20 and MP30 circuit breakers are suitable for use in transfer switchequipmentn Marine Applications:o Homologated by Bureau Veritaso Approved by Det Norske Veritas and Germanische Lloyd'so Listed by Lloyd's Register of Shippingo American Bureau of Shipping applicationo UL marineoHigh Short-time Current Rating: Up to 100 kA for 1 sec.The exceptional short-time rating of 75,000 A in a 3000 A frame and 100,000 A in a 4000 A frameand above allows the circuit breakers to be fully selective up to their interrupting ratings.100% RatedThe circuit breakers are designed for continuous operation at 100% of their current rating.Other PerformancesThe UL 489 and UL1066 (ANSI C37-13) standard performance tests assure that the circuit breakerhas sufficient characteristics to be used in normal conditions. However, the circuit breaker exceeds,without additional costs, the UL standard 1,500 operations required in endurance. The heavy-dutymechanism and the contact design provide a mechanical endurance of 10,000 operations (approx.)without maintenance (see page 64).TropicalizationThe standard moisture and fungus protection ensure normal operation under extreme ambientconditions. MASTERPACT circuit breakers comply with T2 tropicalization (IEC Standard 68-2-30);relative humidity 95% at 113 F (45 C) and 80% at 131 F (55 C) (hot, humid climate). Salt sprayresistance as per IEC 68-2-11.PolesThe 4-pole version is an efficient solution to ground fault problems created by incorrectly groundedstandby generators and incorrect transfer switching systems. By isolating the neutral of multiplesources coupled together, 4-pole circuit breakers prevent ground faults from returning to the sourcevia unintended paths. Where unintended paths exist, ground fault sensing can become inaccurate orcreate nuisance tripping.Ampere Rating 2000MP-MCMP-MC2500MPMP3000MPMP3200MC4000MP-MCMP (1)5000MP-MCMP (1)6300MP (1)(1) Not UL Listed.111/98 1995 Square D—All Rights Reserved
IntroductionRatingsTypeAmpere Rating (A)MP/MC08800Sensor Ratings 005000–6300Interrupting RatingsUL489/NEMA AB1TypeRating (A)480 Vac600 VacShort-timeStandard Interrupting RatingMP08 H180065 kA65 kA50 kAMP12 H1120065 kA65 kA50 kAMP16 H1160065 kA65 kA50 kAMP20 H1200075 kA75 kA75 kAMP25 H1250075 kA75 kA75 kAMP30 H1300075 kA75 kA75 kAMP40 H14000100 kA100 kA100 kAMP50 H15000100 kA100 kA100 kAMP63 H16300 (1)100 kA100 kA100 kAHigh Interrupting RatingMP08 H2800100 kA65 kA50 kAMP12 H21200100 kA65 kA50 kAMP16 H21600100 kA65 kA50 kAMP20 H22000100 kA75 kA75 kAMP25 H22500100 kA75 kA75 kAMP30 H23000100 kA75 kA75 kAMP40 H24000125 kA100 kA100 kAMP50 H25000125 kA100 kA100 kAMP63 H26300 (1)150 kA100 kA100 kA508 V635 VShort-time(1) Not UL Listed.UL1066/ANSI C37–13/NEMA SG3TypeRating (A)Special Interrupting RatingMC08 N180050 kA50 kA42 kAMC16 N1160050 kA50 kA50 kAStandard Interrupting RatingMC08 H180065 kA65 kA50 kAMC16 H1160065 kA65 kA50 kAMC20 H1200065 kA65 kA65 kAMC32 H1320065 kA65 kA65 kAMC40 H14000100 kA100 kA100 kAMC50 H15000100 kA100 kA100 kA2 1995 Square D—All Rights Reserved11/98
AdvantagesDrawout Circuit Breaker Designn The drawout assembly mechanism allows the circuit breaker to be racked in four positions(connected, test, disconnected and withdrawn).n The closing and opening push buttons, the racking handle and racking mechanism are accessible063130050631300406313003through the front door cutout. Therefore the circuit breaker can be disconnected without openingthe door and accessing live parts. Safety shutters can be provided as an option for protection fromlive parts when the circuit breaker is removed.Connected PositionTest PositionDisconnected PositionTrue Two-step Stored Energy MechanismThe closing time is less than five cycles. The circuit breaker is operated via a stored-energymechanism which can be manually or motor charged. Closing and opening operations can be initiatedeither from the local push buttons on the circuit breaker front face or by remote control.O–C–O cycle is possible without recharging.Designed for No Maintenance.The circuit breaker has fewer parts (by a factor of at least five) than conventional circuit breakerswhile performing the same functions. This leads to greatly enhanced reliability and reduction inmaintenance. Under normal operating conditions, according to standards and controlled by tests, thecircuit breaker does not require maintenance. But Exceeds Standards with an Easy and Reduced Maintenance0631300606313007It is easy to remove the arc chutes and visually inspect the contacts and wear indicator. The operationcounter (spring-charging motor option) can also indicate when inspections and possible maintenanceshould be done. After operating conditions exceeding those given by standards, it is possible toextend the circuit breaker life by:n Replacement of arc chutes and spring charging motor by the user.n Replacement of main contacts by an after sale service team.Note: See pages 62–63 for additional information.Contact Good(Circuit Breaker Closed)Contact Worn(Circuit Breaker Closed)311/98 1995 Square D—All Rights Reserved
AdvantagesSingle Design up to 6300 AAll frame sizes have been designed with the same technology featuring identical depth and doorcutouts, and common control units and et Vpush to resetLGmasterpactIOI3I2I190%push OFFIpush ONSTR 58 UtrIr.92.95 60.9.88Io 3000A%Ir.98 30.851.8xIocat. no. 54775for masterpactwith sensorsIm54321.5IIr fault6.38.2frame size 2000A12offO OPEN240th :.2.10offIh600800500thTth .4.4.3.31000 .2320250Ii S–.95.7.98.6.2.1offRIc2.8.93.85.9.86.8–T .12on I t1200AIc1 .9.85testN LM-879222400Im faulttmfaultDoles. IssueNEMAinterrupting ratingampsmax RMS ist.UND. LAB. OCIRCUIT BREAKER0000048015at 1,5Ir.12on I t10xIo8264Im :120tm.4In 6000AIr :tFcircuit breaker3 pole600V 50/60Hzdischarged20%90105M08 H2operationcubicalsuitable for continiousin a minimuminchesat 100% ratingby W21 by D14.1/4space H17.5 not requiredventilation is50%1xIr.951.5xIr690V 50/60HzIEC 957-2 ratinginterrupting75KAIcu 380/440V75KA660V75KAIcu 380/440V75KA660Vshort time ratingsec.Icw 75KA 0.5testconnectedtestdisconnectedField-installable Accessoriesn As the installation develops and changes, the circuit breaker can develop and change with it.06313009Most accessories are field-installable, without losing the UL Listing mark, without any adjustmentand with only the aid of a screwdriver.n The uniform design of the circuit breaker line allows these accessories to be common for thewhole line.Front Connection of Secondary Circuits06313010All accessory terminals are located on a connecting block which is accessible from the front evenwith the circuit breaker in the test or disconnected position. This is particularly useful for fieldinspection and modification.4 1995 Square D—All Rights Reserved11/98
AdvantagesDisconnecting through DoorThe racking handle and racking mechanism are accessible through the front door cutout.Disconnecting the circuit breaker will therefore be possible without opening the door and givingaccess to live parts.Isolation Function by Positive Indication of Contact StatusThe mechanical indicator is truly representative of the status of all three main contacts.Segregated CompartmentOnce the front cover has been removed to provide access to the auxiliary compartment, the maincontacts remain fully isolated. Furthermore, interphase partitioning allows full insulation betweeneach pole even if the front cover has been removed.Reinforced Insulation06313011Two insulation barriers separate the front of the circuit breaker from main circuits.511/98 1995 Square D—All Rights Reserved
Description2Description30631301214513126111. Arc chamber and terminal covers2. Accessories and control unit frontconnecting block3. Position carriage switches4. Opening coils5. Arc chute6. Spring charging motor7. Front cover8. Control unit9. Racking crank10. Pull-out handgrip11. Retractable rails12. Handling handgrip13. Safety shutters1098117Front View1.2.3.4.0631301312IGLILGoffLIGIreset Vpush to resetLG1LIN GERINMERmasterpactIOI3I2I1push OFF90%IMP20H1rcircuit breake3 polez600V 50/60Hpush ONSTR 58 Uframe size 2000Aoperationcubicalsuitable for continiousin a minimuminchesat 100% ratingby W21 by D14.1/4space H17.5 not requiredventilation is50%OOPEN20%trIrIo 3000A90%Ir105.92.95 60.9.88.98 30.851.8xIocat. no. 54775for masterpactwith sensors54Ir :tIr fault8.10off4Ih600800500th400i S–1200AIc1 .9.4.3.3z690V 50/60HIEC 957-2 ratinginterrupting75KAIcu 380/440V75KA660V75KAIcu 380/440V75KA660Vratingshort timesec.Icw 75KA 0.5.2.1.12on I t off.8–T RIc2.8.93.95.7.98.6.85.9.86.85testFTth .41000 .2320250I7.8.5off2th :Im faulttmfault6.422xIntrIhN LM-8792176Im :.2.12on I t128E63335List.UND. LAB. OCIRCUIT BREAKERDoles. Issueinterrupting ratingampsmax RMS symAmpsVolts75K24075K48075K60075KAshort time rating.3.210xIo0000015at 1,5Ir6 .3321.5I2403480tm.4In test9.10.11.12.Charging handleManual opening push buttonManual closing push buttonStored energy mechanism status indicator(charged or discharged)Main contact position indicator (open orclosed)Disconnected position locking (keyinterlock)Disconnected position padlockingDrawout position indicator showing that thecircuit breaker is in the connected, test ordisconnected positionRacking crank storageDoor escutcheonFault indicator and reset buttonOpen position locking (key interlock)ddisconnecte109876 1995 Square D—All Rights Reserved11/98
Control Units06313014The circuit breaker can be equipped with a microprocessor-based, electronic control unit whichprovides all the traditional protection of the universal power circuit breaker (long-time, short-time,instantaneous and ground-fault) plus other built-in functions:n RMS sensing (standard)n Alarm switch (standard)n Overcurrent trip switch (standard)n Interchangeable rating plugs (on STR28DP, STR38SP and STR58UP)n Thermal memory and I2t ramp (standard on STR 38-58 control unit)n Defeatable instantaneous (standard on STR 38-58 control unit)n Zone-selective interlocking for ground-fault and short-time (option)n Current and load meter (option)n Load-monitoring outputs (option)n Fault indicators (option)n Communication ability (option)Control UnitsSTR 18MSTR 28DSTR 38SSTR 58UBasic FeaturesLong-time eDelayAdjustableAdjustableAdjustableFixed (2)Adjustable leTest ReceptacleAdditional Features (Options)Ground-fault Protection (3)Built-in AmmeternFault IndicatorsnnnnSegregated Alarm SwitchnZone-selective InterlockingnLoad MonitoringnCommunication Outputsn(1) Long-time pickup at 1.1 current setting.(2) Defeatable on N1 and H1 types.(3) Two types: residual sensing (T) or residual source ground return (W).711/98 1995 Square D—All Rights Reserved
06313015Control UnitsSTR 28D Control Unit for General Application1push to reset1. Mechanical pop-out type fault indicator and reset button:n Indicates that a fault trip has occurredn Prevents closing of the circuit breaker after fault until reset2. Ammeter (LCD digital display)3. Ammeter selector used to read:n Phase currents (1, 2, 3, N)n Or the phase with the highest load current (max.)4. Load indication (bar graph in % of current setting)5. Sensor rating6. Rating plug (on STR 28DP)7. Long-time current setting8. Instantaneous pickup9. Local and remote pre-trip alarm:n LED on at 90% of current settingn LED flashing on overload (1)n Remote indication by static contact10. Available spaces for setting identification11. Test receptacle2I1I2II390%STR 28 621.58xIrt810Ir :Ir910Overcurrent Protection—RMS SensingIm :Long-timeCurrent Settingi Rating Plug–11test06313016STR 28DP: 0.8 to 1 x Rating Plug (Pickup at 1.1 x Setting)STR 28D: 0.4 to 1 x Current Sensor (Pickup at 1.1 x Setting)ImtLong-time SettingInstantaneousMax. DelayFixed: 7.5 sec. at 6 x Current SettingCurrent SensorPlug Rating250 A250–200–150–125 A400 A400–300–250–200 A600 A600–500–400–300 A800 A800–600–500–400 A1200 A1200–1000–800–600 A1600 A1600–1200–1000–800 A2000 A2000–1600–1200–1000 A2500 A2500–2000–1600–1200 A3000 A3000–2500–2000–1600 A3200 A3200–3000–2500–2000–1600 A4000 A4000–3200–3000–2500–2000 A5000 A5000–4000–3200–3000–2500 A6300 A6300–6000–5000–4000–3200–3000 APickup1.5 to 10 x Current SettingBuilt-in Ammeter (Optional)Option IInstantaneousValues DisplayedPhase 1, 2, 3, Max., Neutral CurrentAccuracy 1.5 % (2)Bar Graph IndicationPhase 1, 2, 3—10% StepsControl PowerNot Required (3)Fault or Alarm IndicatorsNot DiscriminatedILocalPop-out Type Indicator and LED Pre-trip AlarmRemoteOvercurrent Trip and Pre-trip Alarm Switches(see pp. 14–15)(1) According to time-current curves: between 105% and 120% of current setting.(2) Total accuracy including current sensors: 4.5%.(3) Control power not required for loads greater than 20% of current sensor. Required for load less than 20%of current sensors if maximum demand memory requested (see diagram on p. 43).Note: Io: Rating plugIn: Sensor ratingIr: Long-time pickuptr: Long-time delayIm: Short-time pickuptm: Short-time delayI: Instantaneous pickupIh: Ground-fault pickupth: Ground-fault delay8 1995 Square D—All Rights Reserved11/98
Control Units06313017STR 38S Control Unit for Selective Application1push to reset2I1I234II390%STR 38 .4536 .321.5810xIrt.310.2.2.1.10on I2t off111213IIr :Ir faultIm :max.troffxInth :IhIh500faultIm faulttmth600800400320I250Ath.3.4T.414.31000 .2.2.1.11200on I2t off1516iovercurrent –– testground18Ftest17191. Mechanical pop-out type fault indicator and reset button:n Indicates that a fault trip has occurredn Prevents closure of the circuit breaker after fault until reset2. Ammeter (LCD digital display)3. Ammeter selector used to read:n Phase currents (1, 2, 3, N, ground)n Or the phase with the highest load current (max.)4. Load indication (bar graph in % of current setting)5. Sensor rating6. Local and remote pre-trip alarm:n LED on at 90% of current settingn LED flashing on overload (1)n Remote indication by static contact7. Rating plug (on STR 38SP)8. Long-time current setting9. Short-time pickup10. Short-time delay11. Instantaneous ON/OFF selector12. Available space for setting identification13. Ground-fault (option T) pickup14. Ground-fault (option T) time delay15. Local (option F) fault indicators consisting of built-in light emittingdiodes; fault indicators differentiate the three causes of tripping:overload, short circuit and ground fault, if any16. Test receptacle17. Fault indicator saving battery (option PIL)18. Fault indicator reset or battery test button19. Fault indicator reactivating button (option PIL) (2)Overcurrent Protection—RMS sensingLong-timeCurrent SettingSTR 38SP: 0.8 to 1 x Rating Plug (Pickup at 1.1 x Setting)DelayFixed: 7.5 sec. at 6 x Current Setting06313018STR 38S: 0.4 to 1 x Current Sensor (Pickup at 1.1 x Setting)tThermal Memory as StandardRating Plug4 to 6 Rating Plugs Available Per Sensor Rating: See STR 28D Control Unit, p. 8Short-timePickupDelay BandsLong-time Setting1.5 to 10 x Current Setting0–0.1–0.2–0.3–0.4 with I2t OFF0.1–0.2–0.3 with I2t ONInstantaneousPickupHigh-set Fixed Type (3)—Defeatable on N1 and H1 TypesGround-fault Protection (Option T or W) ckupPickup0.1 x Current Sensor to 1200 A (5)Delay Band0.1–0.2–0.3–0.4 with I 2t Ramp ON/OFF SwitchFault Indicators (Option F)Not DiscriminatedShort-time DelayDiscriminatedInstantaneousILocalMechanical Pop-out Type Indicator and LED Pre-trip AlarmRemoteOvercurrent Trip and Pre-trip Alarm Switches (see pp. 14–15)LocalWith Option F (see p. 14)Built-in Ammeter (Option I)Values DisplayPhase 1, 2, 3, Max., Neutral and Ground CurrentAccuracy 1.5% (6)Bar Graph Indication Phases 1, 2, 3—10% stepsControl PowerNot Required (7)(1) According to time current curves: 105% to 120% of current setting.(2) With PIL option, fault indicator lights (15) will light up only when this button is pushed in.(3) See values on pp. 38–40.(4) Residual scheme (T). The maximum ground-fault pickup meets 1999 National Electrical Code paragraph230-95 (a) (not exceeding 1200 A). Source Ground Return scheme (W) on request.(5) 0.1 minimum pickup requires 24 Vdc external power.(6) Total accuracy including current sensors: 4.5%.(7) Control power not required for loads greater than 20% of current sensor. Required for loads less than20% of current sensor if maximum demand memory requested (see diagram, p. 43).911/98 1995 Square D—All Rights Reserved
06313019Control UnitsVpush to resetreset VI TL ILoffL I TI12TL T3I1I24II3590%STR 58 U6789101150%20%Ir90tr.88120.92.95 60.85.9.98 30240%Ir1051.8Imnormmin.τ trtm.4536 .321.58Ir :12.2.1.10on I2t off1012.3.2xIrIt448015at 1.5IrxIo13141514819Ir faultIm :422Max.2tr21xInIh 1200A Max thth :IhfaultIm faulttmthIiovercurrent –– test2223FtestT.46008003202501000 .2.2.1.11200on I2t d.4500400.85.9.8R.95.51xIr181920STR 58U Control Unit for Universal Application1. Mechanical pop-out type fault indicator and reset button:n Indicates that a fault trip has occurredn Prevents closure of the circuit breaker after fault until reset2. Switch selector for the type of fault to be remotely indicated and resetflat push button (see option FV, p. 15)3. Ammeter (LCD digital display)4. Ammeter selector used to read:n Phase currents (1, 2, 3, N, ground)n Or the phase with the highest load current (max.)5. Load indication (bar graph in % of current setting)6. Sensor rating7. Local and remote pre-trip alarm:n LED on at 90% of current settingn LED flashing on overload (according to time current curves: 105%to 120% of current setting)n Remote indication by static contact8. Rating plug (on STR 58UP)9. Long-time current setting10. Long-time delay setting11. Short-time pickup12. Short-time delay13. Thermal memory min./max. selector14. Instantaneous pickup15. Ground-fault (option T or W) pickup16. Ground-fault (option T or W) time delay17. Available space for setting identification18. Load monitoring (option R) pickups (see p. 16)19. Test receptacle20. Fault indicator saving battery (option PIL)21. Local (option F) fault indicators consist of built-in light emitting diodeswhich differentiate the three causes of tripping: overload, short circuitand ground fault, if any22. Fault indicator reset or battery test button23. Fault indicator reactivating button (with PIL option, fault-indicatorlights (21) will only light up when this button is pushed in)10 1995 Square D—All Rights Reserved11/98
06313020Control UnitstOvercurrent Protection—RMS SensingLong-timeCurrent SettingSTR 58UP: 0.8 to 1 x Rating Plug (Pickup at 1.1 x Setting)STR 58: 0.4 to 1 x Current Sensor (Pickup at 1.1 x Setting)Delay BandsLong-time Pickup0.94–1.88–3.75–7.50–15–30s at 6 x Current SettingThermal Memory as Standard with Min./Max. SelectorRating PlugLong-time DelayGround-faultPickupGround-faultDelayShort-time PickupShort-time PickupInstantaneous PickupIShort-timeCurrent SensorPlug Rating250 A250–200–150–125 A400 A400–300–250–200 A600 A600–500–400–300 A800 A800–600–500–400 A1200 A1200–1000–800–600 A1600 A1600–1200–1000–800 A2000 A2000–1600–1200–1000 A2500 A2500–2000–1600–1200 A3000 A3000–2500–2000–1600 A3200 A3200–3000–2500–2000–1600 A4000 A4000–3200–3000–2500–2000 A5000 A5000–4000–3200–3000–2500 A6300 A6300–6000–5000–4000–3200–3000 APickup1.5 to 10 x Current SettingDelay bands0–0.1–0.2–0.3–0.4 with I2t OFF0.1–0.2–0.3 with I2t ONZone-selective Interlocking with Option Z (see p. 13)InstantaneousPickupAdjustable from 2 to Max. Value (1); Defeatable on N1 andH1 TypesGround-fault Protection (Option T or W) (2)Pickup Delay Band0.1 x Current Sensor to 1200 A (3)0.1–0.2–0.3–0.4 with I2t Ramp ON/OFF SwitchZone-selective Interlocking with Option Z (see p. 13)Fault Indicators (Option F)Not DiscriminatedDiscriminatedLocalMechanical Pop-out Type Indicator and LED Pre-trip AlarmRemoteOvercurrent Trip and Pre-trip Alarm Switches (see pp. 14–15)LocalWith Option F (see p. 14)RemoteWith Option FV (see p. 15)Built-in Ammeter (Option I)Values DisplayPhase 1, 2, 3, Max., Neutral and Ground CurrentAccuracy 1.5% (4)Bar Graph Indication Phase 1, 2, 3—10% StepsControl PowerNot Required (5)Load Monitoring (Option R)Inverse Time AlarmPickupsIc1 0.8 to 1 x Current SettingIc2 0.5 to 1 x Current SettingTime delaySee Curve, p. 41Outputs for Communication through DIGIPACT System (Option C)Transmitted ValuesEntire Settings of the Trip UnitCircuit Breaker Status: Open, Tripped, ClosedAlarms: Overload, Type of Fault, Internal Watchdog (6)Ammeter Values: Phase, Neutral, Ground, Max. Currents(1) See values on pp. 38–40.(2) Residual scheme (T). The maximum ground-fault pickup meets 1999 National Electrical Code paragraph230-95 (a) (not exceeding 1200 A). Source Ground Return scheme (W) on request.(3) 0.2 minimum pickup only with external power.(4) Total accuracy including current sensors: 4.5%.(5) Control power not required for loads greater than 20% of current sensors. Required for loads less than20% of current sensor if maximum demand memory requested (see diagram, p. 43).(6) Internal watchdog: Control unit internal temperature.1111/98 1995 Square D—All Rights Reserved
06313182Control UnitsThermal Memorypush to resetPurposeThe thermal memory function allows an optimization of cables or bus bar protection in case of lowamplitude repetitive faults. Such faults can be due to repetitive motor startings, fluctuating load orsubsequent closing after a fault.I1 I2 I390%STR 58 U50%Traditional electronic protection has no effect when facing such repetitive faults because theduration of each overload above the pickup setting is too short to achieve effective tripping.Nevertheless, each overload involves a temperature rise in the installation, the cumulative effect ofwhich could lead to overheating of the system.20%IrxIntrxIoImat 1.5IrtmxIotPrincipleIxInIhi Ic1thTIc2RDANGERxInHAZARD OF ELECTRICAL SHOCK, BURNOR EXPLOSION.testxIrxIrFtestUse "min" position for emergency only whenclosing on fault is absolutely necessary.Failure to observe these precautions willcause death, personal injury or electricalshock.0631318406313183The thermal memory function remembers and integrates the thermal heating caused by each pickupsetting overrun. Before tripping, the integrated heating value will reduce the associated time delayand, therefore, the reaction of the control unit will be closer to the real heating of the power networksystem. After tripping, the memory will also reduce the time delay when closing the circuit breakeron fault.ITemperaturePickup SettingttSTR Trip Units0631318506313186The STR 38S and STR 58U trip units incorporate the thermal memory as standard:n Before tripping on long-time and ground-fault protection (if provided)n After tripping on long-time protection only, adjustable min./max. position for the STR 58U trip unitis standardThe control unit measures the internal temperature rise of the circuit breaker by thermal resistors. Thecooling time constant of the memory is not fixed, but depends on the over-temperature condition.I2 tI 2tTrip LevelTrip LeveltSTR Trip Unit withThermal MemorytSTR Trip Unit withoutThermal Memory12 1995 Square D—All Rights Reserved11/98
06313021Control UnitsNeutral SensorMain Circuit BreakerT1T2S1S206313023Ground-fault protection may be applied on3Ø4W or 3Ø3W circuits. On 3Ø4W circuits anexternal neutral sensor must be used. Thisneutral current sensor must have the sameampere rating as the circuit breaker sensor.NeutralGround-faultNeutral CTsS1T1S2T2Zone-selective Interlocking (ZSI)Option Z on the STR58U control unit providesselective interlocking on short time or groundfault. A pilot wire links several trip units in thedistribution network, as shown in the oppositefigure. In the event of a fault, the trip unit willrespond to the preset delay only if receiving asignal from the downstream unit. If not receivinga signal, the tripping will be instantaneous.Therefore, the fault is cleared instantaneouslyby the nearest circuit breaker: the thermalstresses (I2t) in the network are minimized,without any effect on the correct time-delaycoordination in the installation.Note: #18 to #14 AWG cables, max. length 90 ft./30m.06313022AZ12Z11Z22 OutZ21 In1Fault 1Circuit breaker A will clear the faultinstantaneously, regardless of its time-delaysetting.BZ12Z11 OutZ22Z21 InZ12Z11 OutZ22Z21 In2Z12Z11Z22Z21OutInZ12Z11Z22Z21OutInZ12Z11 OutZ22Z21 InFault 2Circuit breaker B will inform upstream circuitbreaker A that it is clearing the fault and willprevent it from tripping instantaneously. Circuitbreaker A will trip at the end of its time delaysetting if the fault is not cleared during this time.Note:n Drawout circuit breaker terminals aredelivered with "in" terminals jumpered.Remove the jumper when interlocking with adownstream circuit breaker.n The MASTERPACT circuit breaker may alsobe interlocked with COMPACT NS and CKtype molded case circuit breakers with ZSIoption.n Do not ground ZSI wiring.Cable Size#18–#14 AWG/1.5mm2Max. Length90 ft./30 mWiringTwisted in Pairs One Turn per 4 in./10 cmNo. of Circuit BreakersUpstream: 2Downstream: No Limit1311/98 1995 Square D—All Rights Reserved
Fault Indicator (F)push to resetI1 I2 I390%STR 58 U50%20%IrtrxIoImat 1.5IrtmxIotIi Ic106313025xInIhTthxInIc224 Vdc1W06313027In addition to the mechanical fault indicator, this indicator differentiates the three causes of tripping:overload, short circuit or ground fault, if any. Three light-emitting diodes indicate separately longtime, short-time/ instantaneous and ground-fault trip. A flat push button allows resetting of theindicator after tripping. A separate power supply is required to maintain the indication after trippingof the circuit breaker. Two different possibilities are offered:n Connecting a reliable 24 Vdc control voltage on F1-F2. Auxiliary power module (AD) is used forother voltages. When the control source is considered as unreliable, a battery pack (BAT) is tobe added to an AD power module.n From a built-in battery module. When no external control source is available, a built-in batterymodule may be ordered (option PIL). This module integrates battery testing and indicatorreactivating buttons.0631302606313024Control Units RAD (1)testxIrxIrAD (1)Ftest BAT F1F2F1F2F1F2(1) AC: 120 V, 60 HzDC: 24–48–125 VdcConfiguration with ReliableControl VoltageConfiguration withInterruptible Control Voltage06313028Alarm Indicator Pre-trip Alarm Switch (ALR)push to resetDelivered as standard with control unit. The alarm indicator is a fixed, front face light-emitting diodewhich operates as follows:n Fixed when the current exceeds 90% of the current setting.n Flashing on overload: according to time-current curves, 105% to 120% of current setting.The pre-trip alarm switch is a static contact which closes when in the overload zone, up to thetripping of the circuit breaker. This contact can be used for ultimate load shedding, alarm beforetripping, etc.I1 I2 I390%STR 58 U50%ALR20%IrtrxIoImat 1.5IrtmOutput Characteristics0.1 A/240 Vac (Optical Triac)Power SupplyNot RequiredxIotIxInIhi Ic1thTIc2RxIntestxIrxIrFtest14 1995 Square D—All Rights Reserved11/98
Control UnitsOvercurrent Trip Switch (SDE)06313029Delivered standard with control unit. In addition to the fault trip indicator/reset button, one SPDTswitch provides alarm/lockout information. This SPDT switch is operated only when the circuitbreaker is tripped by the control unit. When the circuit breaker is reset, the "a" switch (alarm) isopen and the "b" switch (lockout) is closed.Output CharacteristicsSPDT 10 A/240 VacPower SupplyNot RequiredFault8284SDE81V06313030Segregated Trip Switch (FV)push to resetThis switch works exactly as the standard overcurrent trip
The UL 489 and UL1066 (ANSI C37-13) standard performance tests assure that the circuit breaker has sufficient characteristics to be used in normal conditions. However, the circuit breaker e
LV power air circuit breakers Descriptive price list 05April MGLV5705 MASTERPACT(April'05) 22/2/05 3:36 pm Page 1. Contents Section 1 Masterpact NT Page Masterpact NT overview and characteristics 4 Masterpact NT standard specification 11 Masterpact NT fixed versions 12
Figure 1: Masterpact NW Drawout Circuit Breakers Low-Voltage Power Circuit Breaker Insulated Case Circuit Breaker IEC Rated Circuit Breaker IEC Extreme Atmospheric Conditions ANSI C37.13 ANSI C37.16 ANSI C37.17 ANSI C37.50 UL 1066 (cULus Listed) NEMA SG3 UL 489 (UL Listed) NEMA AB1 CSA 22.2 No. 5092 NMX J-266-ANCE IEC 60947-2 IEC 60947-3
Circuit-breaker with RHE RHD Circuit-breaker with HTC Circuit-breaker with LTC Circuit-breaker with FLD A IP 40 IP 20 IP 40 IP 40 IP 40 IP 40 B IP 20 IP 20 IP 20 IP 40 IP 30 IP 20 (1) During installation of the electrical accessories Weights A1 [Kg] A2 [Kg] A3 [Kg] Circuit-breaker 1 pole 0.245 0.37 - Circuit-breaker 2 poles 0.47 0.73 - Circuit .
electronic trip circuit breaker A circuit breaker which uses current sensors and electronic circuitry to sense, measure and respond to current levels. fixed-mounted circuit breaker A circuit breaker so mounted that it cannot be removed without removing primary and sometimes secondary connections and/or mounting supports.
System pro M compact Miniature Circuit Breaker SU200 M for branch circuit protection acc. to UL 489 Data Sheet The miniature circuit breaker SU200 M is ABB's solution for UL 489 branch circuit protection up to 480 Y/277 V AC and 96 V DC. This circuit breaker is an all-round device for AC and DC applications for universal use in North
Student Manual Circuit Breaker Cubicle USNRC 4-1 Rev 0 4.0 CIRCUIT BREAKER CUBICLE Learning Objectives The circuit breaker cubicle is the component of the switchgear that holds the circuit breaker,
5.1 Circuit breaker offered shall be sulphur hexaflouride (SF6) type only. 5.2 Any part of the breaker, especially the removable ones, shall be freely interchangeable without the necessity of any modification at site. 5.3 Circuit breaker shall comprise of three identical single pole units. If the circuit breaker
As with all Adonis Index programs the specific exercise selection will optimize your shoulder to waist measurements to get you closer to your ideal Adonis Index ratio numbers as fast as possible. IXP 12 Week Program. Cycle 1 – Weeks 1-3: Intermittent Super Sets. Week 1: 3 Workouts. Week 2: 4 Workouts . Week 3: 5 Workouts. Intermittent super sets are a workout style that incorporates both .
