羅克韋爾SS-Ct7熱過載繼電器(英文)

1、Series CT7Thermal OverloadRelaysChoose CT7 overloads inDC applications andwhen monitoring VariableFrequency DrivesSprecher + Schuh provides outstanding motorprotection with our CT7 Thermal Overload RelaySprecher + Schuh has always paidparticular attention to the subject ofmotor protection. This conc

2、ern isreflected in our CT line of thermaloverload relays that include manystandard features not available withtraditional overload protection devices.Consistent and reliableprotectionThe consistent high quality of Sprech-er + Schuh thermal overload relays isensured by a complex current limitingcalib

3、ration procedure performed aftereach unit is at full operating tempera-ture. Calibration is performed at thelargest and smallest current theoverload can handle. The accuratetime/current characteristic curveobtained in this manner guaranteesreliable motor protection every time.Superior Class 10charac

4、teristicsTodays T-Frame motors have lesscopper and iron that the old U-Framemotors that were popular whentraditional Class 20 overload relayswere designed. For this reason, fasterClass 10 overloads like the CT Serieshave been recognized by many motormanufacturers as the ideal type toassure optimum m

5、otor protection.Protection from singlephase conditionsA unique feature not found in tradi-tional thermal overload relays providesaccelerated tripping under single phaseconditions. This is accomplished witha special “differential tripping”mechanism built into CT7 (seeillustration at right).Ambient te

6、mperaturecompensationAll Sprecher + Schuh thermal overloadrelays are temperature compensated.An additional bimetallic ambientcompensation strip, built into theconductor-bimetal transmission path,ensures that the tripping characteristicsof the relay remain constant over anambient temperature range of

7、25°C to +50°C.Single phase applicationsCT Series thermal overload relays canbe applied for protection of singlephase AC motors. The relays have thesame characteristics as shown for threephase operation. To maintain theseCT7characteristics, each element of theoverload relay must carry the m

8、otorcurrent as shown in the schematic onpage B19.Other standard featuresCT thermal overload relays feature afail-safe “trip-free” design that preventsthe device from being held closedduring an overload. In addition, aselectable reset button permits any oneof three reset options to be chosen:test, ma

9、nual or automatic modes.A separate NO signal contact is alsoprovided on CT7 overloads which isisolated from the NC trip contact.This permits the use of a trip signalvoltage different than that of thecontrol voltage. A NO signal contactcan be added to the CT4 in the field.CT7 Thermal Overload Relays

10、offer acceleratedtripping under single phase conditionsB15CT7 Thermal Overload Relays, Manual or Automatic Reset Note: CT7 Thermal Oveload Relays do not fitinto standard “A” and “B” enclosures withstandard reset assemblies. They can only beused on “Open Style” starters or customquoted enclosures. Co

11、ntact your Sprecher+Schuh representative for more information.CT7Special Note:Wye-Delta Starters - First multiply motor full load current by58%. Then, using this figure, select appropriate OverloadRelay Code from tables above.Part Winding Starters - First multiply motor full load currentby 50%. Then

12、, using this figure, select appropriate OverloadRelay Code from tables above.Contactors noted will physically attach to the overload relays listed. This referenceis not intended to be a guide for selecting contactors. Size overload relays usingthe full load current of the motor.For separately mounte

13、d overload, purchase DIN-Rail/Panel Mount Adaptor inAccessory section (Cat.# CT7-P-A).B16Discount Schedule A-1AccessoriesCT7Marking Systems Panel mount adaptors are not available forCT7-45-3045. If panel mount required, orderCT7-75-3045 Overload Relay and useCT7-75-P-A Panel Mount Adaptor.The labeli

14、ng field of the overload relay may alsobe written on by hand.Minimum order quantity is one package of 100.Price each x 100 = total price.Discount Schedule A-1B17Electrical DataCT7-24CT7-45CT7-75CT7-100-90Main CircuitsRated Insulation Voltage UiULVCSAVRated Impulse Strength UimpkVRated Operating Volt

15、age UeVOvervoltage Category/Degree of ContaminationProtective SeparationBetween main circuits and aux. contacts.Per DIN, VDE 106, Part 101 and Part 101 A1VTerminal Cross-SectionsTerminal TypeTerminal Screws6006906690III/36006906690III/36006906690III/3600100081000III/3440440440440mm2mm2mm2AWGNmlb-inS

16、izemmSW mm2 x (14)2 x (16)1481621 x 61 x 252 x (110)2 x (116)1423121 x 61 x 252 x (110)2 x (116)1423121 x 65016502544CT7Flexible with WireEnd FerruleSolid ConductorStrandedMax. Wire Size per UL/CSARecommended TorquePozidrive ScrewdriverSlotted ScrewdriverHexagon Socket SizeControl CircuitCT7-24Rated

17、 Insulation Voltage UiRated Impulse Strength UimpRated Operating Voltage UeRated Operating Current UeAC-15VkVV220240VA380415VA500VA24VA60VA110VA220VAA5006500CT7-455006500Normally open0.90.750.40.26CT7-755006500Normally Closed0.90.750.40.26CT7-100-905006500DC-13, At L/R 15ms/Convent

18、ional Thermal CurrentTerminal Cross-SectionsTerminal TypeTerminal ScrewsFlexible with WireEnd FerruleSolid ConductorStrandedMax. Wire Size per UL/CSARecommended TorquePozidrive ScrewdriverSlotted Screwdriver66M 3.5mm2mm2AWGNmlb-inSizemm2 x (0.752.5)2 x (0.754)18141121 x 6M 3.52 x (0.752.5)2 x (0.754

19、)18141121 x 6M 3.52 x (0.752.5)2 x (0.754)18141121 x 6M 3.52 x (0.752.5)2 x (0.754)18141121 x 6B18Discount Schedule A-1General DataCT7-24WeightStandardsApprovalsCorrosion ResistanceAmbient TemperatureOpenEnclosedTemperature CompensationShock Resistance10ms sinusoidal shockType of Protectionin connec

20、ted stateFinger Protectionkg (lb)0.13 (0.29)CT7-45CT7-75CT7-100-901.3 (2.86)0.21 (0.46)0.21 (0.46)IEC 947, EN 60 947, DIN VDE 0660CE, UL, CSA, PTBHumid/Warm, Constant, per DIN, IEC 68, Part 2-3Humid/Warm, Cyclic, per DIN, IEC 68, Part 2-3025+50°C (13122°F)25+40°C (13104°F)Continu

21、ous (Temperature Range 5+40°C per IEC 947, EN60947; PTB: 5+50°C)G10IP00IP2LX (in a connected state)Safe from touch by fingers and back of hand (VDE 0106, Part 100)CT7Short Circuit CoordinationMounting onContactorCatalogNumberCT7-24-0.16CT7-24-0.24CT7-24-0.4CT7-24-0.6CT7-24-1.0CT7-24-1.6CT7

22、-24-2.4CT7-24-4CT7-24-6CT7-24-10CT7-24-16CT7-24-24CT7-45-30CT7-45-45CT7-75-30CT7-75-45CT7-75-60CT7-75-75CT7-100-90AdjustmentRanges A0.4 1.02.4446610101616241830304518303045456060757090gL Back-Up Fuses max.Ie AType 1 Coordination25252525252525252550636380125801

23、25160250315Type 2 Coordination0.51244610162025355063806380100160200CA7-9CA7-37CA7-12CA7-37CA7-23CA7-37CA7-30CA7-43CA7-37CA7-43CA7-60.CA7-85CA7-72CA7-85Separate MountingConnection DiagramsDiscount Schedule A-1B19Tripping CharacteristicsThese tripping characteristics comply with IEC 947 and arethe mea

24、n values of the scatter bands at 20°C ambienttermperature starting from the cold state. Tripping time is aCT7-24, 45 & 75CT7-100-90function of operating current. In equipment at operatingtemperature, the tripping time of the overload relay falls toapproximately 1/4 of the read value.CT7 The

25、rmal Overload Relay(thermally delayed over-current relay)with differential tripping for motorprotection in the event of a phase failure.Mean value of tolerance bands, heated inthree phases.Curves:from cold stateCurves:trip time for singlephase condition.Function Limits: -25°C+50°CTemperatu

26、re Compensation: continu-ous from -5°C+40°C.CT7B20Discount Schedule A-1CT7Discount Schedule A-1B21NotesCT7B22Discount Schedule A-1Series CT7Kand CT4ThermalOverload RelaysSimple and effectivemotor protection forapplications to 10HP 460V(15HP 575V)Sprecher + Schuhs economical CT7Kand CT4 The

27、rmal Overload Relaysshare the same excellent protectioncharacteristics as our full featuredthermal overload relays, with theexception of differential tripping andselectable reset, yet still trip undersingle phase conditions at 1.25 x setcurrent.Consistent and reliableprotectionThe consistent high qu

28、ality of Sprech-er + Schuh thermal overload relays isensured by a complex current limitingcalibration procedure performed aftereach unit is at full operating tempera-ture. Calibration is performed at thelargest and smallest current theoverload can handle. The accuratetime/current characteristic curv

29、eobtained in this manner guaranteesreliable motor protection every time.Superior Class 10characteristicsTodays T-Frame motors have lesscopper and iron that the old U-Framemotors that were popular whentraditional Class 20 overload relayswere designed. For this reason, fasterClass 10 overloads like th

30、e CT Serieshave been recognized by many motormanufacturers as the ideal type toassure optimum motor protection.Ambient temperaturecompensationAll Sprecher + Schuh thermal overloadrelays are temperature compensating.An additional bimetallic ambientcompensation strip, built into theconductor-bimetal t

31、ransmission path,ensures that the tripping characteristicsof the relay remain constant over anambient temperature range of25°C to +60°C.Single phase applicationsCT Series thermal overload relays canbe applied for protection of singlephase AC motors. The relays have theCT7Ksame characterist

32、ics as shown for threephase operation. To maintain thesecharacteristics, each element of theoverload relay must carry the motorcurrent as shown in the schematic onpage B27.Convenient dial adjustmentof motor FLARather than changing “heaters” to setthe overload to the motors FLA, CTrelays have a dial

33、adjustment on thefaceplate. This convenience offers awide range of FLA settings and allowsyou to accurately set or reset theoverload in seconds.Other standard featuresCT thermal overload relays feature afail-safe “trip-free” design that preventsthe device from being held closedduring an overload. CT

34、4 and CT7Koverload relays feature a manual reset.An optional NO signal contact can beadded to the CT4 and CT7K in thefield for use as an alarm circuit.B23CT7K Thermal Overload Relays, Manual Reset CT7KCT7K & CT4 Thermal Overload Relay AccessoriesSeparately mounted overload not available.B24Disco

35、unt Schedule A-1Electrical DataCT7KCT4-9CT4-12Main CircuitsRated Insulation Voltage UiULCSAcULusRated Impulse Strength UimpRated Operating Voltage UeOvervoltage Category/Degree of ContaminationTerminal Cross-SectionsTerminal TypeTerminal ScrewsFlexible with WireEnd FerruleSolid ConductorStrandedMax.

36、 Wire Size per UL/CSARecommended TorquePozidrive ScrewdriverSlotted Screwdrivermm2mm2mm2AWGlb-inSizemmVVVkVV6006600III / 36006006690III / 36006600III / 3M3.52 x (12.5)2 x (1.54)2 x (12.5)2 x (1410)122021 x 6M3.52 x (12.5)2 x (1.54)2 x (12.5)2 x (1410)122021 x 6M3.52 x (12.5)2 x (1.54)2 x (12.5)2 x (

37、1410)122021 x 6CT7KControl CircuitCT7KRated Insulation Voltage UiRated Operating Voltage UeRated Operating Current UeAC-15Conventional Thermal CurrentTerminal Cross-SectionsTerminal TypeTerminal ScrewsFlexible with WireEnd FerruleSolid ConductorStrandedMax. Wire Size per UL/CSARecommended TorquePozi

38、drive ScrewdriverSlotted Screwdrivermm2mm2mm2AWGlb-inSizemmVV220240V380415VAAA69069031.64CT4-9500500CT4-12500500M 3.52 x (0.752.5)2 x (0.752.5)2 x (0.752.5)2 x (1814)1121 x 6M 3.52 x (0.752.5)2 x (0.752.5)2 x (0.752.5)2 x (1814)1121 x 6M 3.52 x (0.752.5)2 x (0.752.5)2 x (0.752.5)2 x (1814)1121 x 6Ge

39、neral DataWeightkg (oz)StandardsApprovalsCorrosion ResistanceAmbient TemperatureOpenEnclosedCT7K / CT4-9 / CT4-120.15 (4.8)IEC 947, EN 60 947, DIN VDE 0660CE, UL, CSA, PTBHumid/Warm, Constant, per DIN, IEC 68, Part 2-3Humid/Warm, Cyclic, per DIN, IEC 68, Part 2-3025+60°C (13140°F)25+40

40、6;C (13104°F)TemperatureCompensationShock Resistance10ms sinusoidal shockType of Protectionin connected stateFinger ProtectionContinuous (Temperature Range 5+40°Cper IEC 947; EN60947; PTB: 5+50°C)G10IP00IP2X (in a connected state)Finger and back of hand safe (VDE 0106, Part 100)Discou

41、nt Schedule A-1B25Short Circuit Coordination - CT7K Mounting onContactorCatalogNumberCT7K-17-0.15CT7K-17-0.23CT7K-17-0.35CT7K-17-0.55CT7K-17-0.8CT7K-17-1.2CT7K-17-1.8CT7K-17-2.7CT7K-17-4CT7K-17-6CT7K-17-9CT7K-17-12.5CT7K-17-17.5CT7K-17-12.5CT7K-17-17.5AdjustmentRanges A50.35 0.

42、550.52.72.744669912.512.517.5912.512.517.5gL Back-Up Fuses max. Ie AType 1 Coordination505050505050505050505050505050Type 2 Coordination22244610162025252535CA7-9CA7-23CA7-12CA7-16CA7-23CT7KShort Circuit Coordination - CT4 Mounting onContactorCatalogNumberCT4-0.15CT4-0.23CT4-0.35CT4-0.55CT4-0.8CT4-1.2CT4-1.8CT4-2.7CT4-4CT4-6CT4-7.7CT4-9CT4-10.5CT4-12AdjustmentRanges A50.35 0.550.52.72.744667.77.598.810.510.412gL Back-Up Fuses max. Ie AType 1 Coordination25252