Motortronics VMX Series Compact Soft Starter User Manual

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Table of ContentsPageChapter 1: Introduction1.1General Description 11.2Sizes and Ratings 4Chapter 2 - Installation2.1Receiving and Unpacking .52.2Choosing a Location .52.3Initial Unit Inspection .52.4SERVICE WARNING! .62.5Mounting and Cleaning .62.6Power Terminations 72.7Remote Keypad Mounting92.8Dimensions .103.1Solid State Overload Protection 113.2NEMA Class Trip Curves .134.1Power Connections .154.2Control Connections 165.1Introduction .235.2Digital Interface 235.3Display Modes .24Program Mode .25Chapter 3 - Motor Overload ProtectionChapter 4 – ConnectionsChapter 5 – Programming5.45.4.5Chapter 6 - Start-upChapter 7 - Fault ConditionsAppendicesFault Mode 285.5The VMX Function List .305.6Function Descriptions .365.6.1Motor and Overload Functions .365.6.2Starting Mode .385.6.3/4 Jog Mode / Kick Start Mode .425.6.5Pump-Flex Decel Mode 435.6.6Restart Delay .445.6.7Process Timer Control Mode 455.6.8Current and Ground Fault Protection475.6.9Lockouts, Reset & Internal Protection495.6.10Output Relays .565.6.11Communications .575.6.12System Settings .585.6.13Fault History and Statistical Data606.1Basic Startup 626.2Start-up Check List .636.3Sequence of Operation .636.4Testing with a smaller motor .647.1Fault Codes and Numbers .64Appendix 1 - Ramp Profile Details .Appendix 2: Pump-Flex Decel Mode Application Considerations Appendix 3: Parameter Lock / User Password Instructions Appendix 4: Process Control Timer Functions .Appendix 5: External Over Load Relay Applications . .Appendix 6: Soft Starter Settings Record . . Warranty Information . VMX Digital Solid State Soft Starter User Manual1 PageBuy: Phone 844-385-3099 Email: CustomerService@valin.com66697274828792

Chapter 1 - Introduction1.1 General DescriptionThe VMX Series is a digitally programmable solid-state reduced voltagesoft starter. Its six SCR design features a voltage/current ramp with ananti-oscillation circuit for smooth load acceleration. The SCRs are sizedto withstand starting currents of 350% for 30 seconds and up to 600%for 10 seconds. The VMX Series features smooth, stepless rampcontrol, which reduces motor inrush current and excessive wear on themechanical drive train components. The VMX Series includes aprogrammable keypad for setting operating parameters for the idealstarting cycle and protection features, plus easy to understanddiagnostic LEDs. Starting torque, ramp time, current limit, dual ramp,and Decel control are standard features on the VMX Series, as well asthe integrated Batch Process Timer and Time Clock Controller used forautomated applications. By simply adjusting the unit‟s starting torque,ramp time and current limit functions, the starting electricalcharacteristics of the motor can be matched to the mechanicalcharacteristics of the drive train for controlled acceleration of the load.The VMX Series includes solid-state electronic overload protection inaddition to numerous other protective features. It requires 120VAC(220VAC optional) control power and uses dry contact inputs for Start /Stop control. Programmable auxiliary contacts and provisions forinterlocking are also included.1.1.1 Control FeaturesAcceleration AdjustmentsDual Ramp SettingsProgrammable Ramp Types:Voltage Ramp (VR) or closed loop Current Ramp (CR)Starting Torque: 0 - 100% of line voltage (VR)or 0 - 600% of motor FLA (CR)Ramp Time: 1 to 120 secondsCurrent Limit: 200 - 600% (VR or CR)4 Options:Ramps 1 & 2 VR,Ramp 1 VR, Ramp 2 CR,Ramps 1 & 2 CR;Ramp 1 CR, Ramp 2 VRDual Ramp Control:Ramp #1 Default,Ramp #2 Selectable via dry contact inputDeceleration AdjustmentsBegin Decel Level: 0 - 100% of line voltageStop Level: 0 to 1% less than Begin Decel LevelDecel Time: 1 - 60 secondsProgrammable to Decel or coast to stop upon overload tripJog SettingsJog function selected via dry contact closure input.Jog Voltage: 5 - 100%Time of Jog Voltage: 1 - 20 secondsJog Current: 100 - 500%Kick Start SettingsKick Voltage: 10 - 100%Kick Time: 0.1 - 2 secondsProcess Timer(2 modes)Minimum Batch Timer: Runs until timer expiresMaximum Batch Timer: Runs unless timer expiresRange: 0 - 9999 minutesReal Time Clock (RTC)Controller24/7 Time Clock ControllerRange: 1-24 hours, and 1- 7 days per week,1 - 7 start events per day, works with Process Timer for run timeVMX Digital Solid State Soft Starter User Manual1 PageBuy: Phone 844-385-3099 Email:

1.1.2Advanced Motor Protection FeaturesThermal Model ElectronicOverload ProtectionA sophisticated Thermal Model of the motor operation is created in themicroprocessor to accurately track all starting, stopping and running conditionsthus, providing maximum motor protection.Two StageOverload CurvesStarting: Programmable for Class 5 or 10Run: Programmable for Class 5 through 30 when "At-Speed" is detected.Overload ResetManual (default) or automatic.Retentive Thermal MemoryOverload circuit retains thermal condition of the motor regardless of controlpower status. Unit uses real time clock to adjust for off time.Dynamic Reset CapacityOverload will not reset until thermal capacity available in the motor is enough fora successful restart. Starter learns and retains this information by monitoringprevious successful starts.Current Imbalance TripTrip Level: 5 - 30% Imbalance in any two phasesTrip Delay: 1 -20 secondsPTC Input TripTrips on greater than 750 ohms resistance on a dedicated PTC input. Can beused with an Emergency Stop or any other External Lockout.Over Current Trip(Electronic Shear Pin)Trip Level: 50 - 300% of motor FLATrip Delay: 1 - 20 secondsPhase LossTrips on any phase current less than 20% of unit rating.Can be disabled in programming for testing with smaller loads.Equipment Ground FaultProtectionType: Residual Current TripRange: 5 – 90% of unit CT ratioTrip Delay: 1 – 60 secondsLoad Loss TripUnder Current Trip Level: 10 –90 % of motor FLATrip Delay: 1 – 60 secondsCoast Down (Back Spin)Lockout TimerPrevents restart when motor may be spinning backwards.Coast Down Time Range: 1 – 60 minutes.Starts-per-hour Lockout1 – 10 successful starts per hourMinimum Time betweenStarts LockoutRange: 1 – 60 minutes between start attemptsRestart DelaySequential Start Feature for restarting delay after a power outage.1-999 seconds after a power loss.Auto ResetCan be programmed to attempt resetting after selected faults.0 – 10 Attempts, 0 – 999 minutes delay between attempts.Power Device MonitoringShorted SCR Lockout (1 shorted SCR) and independent Shunt Trip (multipleshorted SCRs). Can be disabled in programming.VMX Digital Solid State Soft Starter User Manual2 PageBuy: Phone 844-385-3099 Email:

1.1.3Design SpecificationsType of Load:Three phase AC induction motors.AC Supply Voltage:Universal, 208 - 600VAC 10%, 50/60 Hz.Power Ratings:18 - 1250 Amps, 7.5 - 1000 HP @ 460V.Unit Capacity - ContinuousMax. Amp rating is UL Listed continuous rating.Unit Capacity - Overload Rating(Percent of motor FLA)350% - 30 seconds.Power CircuitSCR Firing Angle Detection600% - 10 seconds.6 SCRs, full phase angle firing using a hard fire picket firing circuit and “BackPorch” DC carryover to avoid motor transient problems.6 pulse Independent Locked Phase Tracking with Auto-synchronization,prevents misfiring on unstable source frequency.SCR PIV Ratings(Peak Inverse Voltage)1600VPhase RotationOperates with any phase sequence, orprogrammable rotation trip, ABC / ACB / Off.Transient ProtectionRC snubber dV/dt networks on each phase.CoolingFan assisted convection.Bypass ContactorStandard on all NEMA 12 enclosed units.Units 160A and less:Standard on all open panel units (-BP versions).Units 210A and over:Optional on open panel units (-BP versions).Bypass Contactor RatingBypass Contactor ControlShunt rated or can be sized for Line start rated contactor. (see charts)Integral control is included, but contactor can be externally controlled as well.Open panel mount units: 0 to 50 C (32 to 122 F)Ambient Condition DesignFactory enclosed units: 0 to 40 C (32 to 104 F)5 - 95% relative humidity.0 - 3300 ft. (1000m) above sea level without derating.Control Power120VAC (customer supplied), 240VAC optional.Inputs6 Dry (voltage free) contact inputs using 24VDC from an internal power supply.Programmable Outputs3 relays, 2 each Form C (SPDT), 1 each Form A (SPST).Can be programmed for 26 functions, with delays or flashing.Output Relay Contact Rating5 Amps, 240VAC max. (1200VA)Dedicated Fault OutputApprovalsAC triac solid state switch.240VAC/DC, 50mA max.UL Listed, Canadian UL (cUL) Listed CE Approved.VMX Digital Solid State Soft Starter User Manual3 PageBuy: Phone 844-385-3099 Email:

1.2Sizes and RatingsThe Motortronics VMX Series starters are current rated controllers.Max. Amp ratings are for continuous duty and must not be exceeded.Always check the motor nameplate FLA and Service Factor to ensureproper sizing.Each size has an adjustable current range from 50% to 100% of theMax Amp rating. Table 1.2 shows the Current Ratings available.1.2.1Selecting for Service Factor UtilizationMany NEMA design motors include a design rating referred toas Service Factor (SF) that may allow continuous operationabove the nameplate current rating. If using this ServiceFactor, the VMX Series starter must be sized for the totalamps used. For proper selection of the VMX Series starterwhen using SF continuously, multiply the nameplate FLA bythe stated Service Factor, or use stated Service Factor Amps(SFA) if listed on the nameplate. The following excerpt is fromthe NEMA MG-1 standards for AC Motors that describes theissues concerning the use of Service Factor ratings.Table 1.2 VMX Series RangeModelNumberCurrentRangeMin.- Max.VMX-18-BP9 - 18VMX-28-BP14 - 28VMX-39-BP19 - 39VMX-48-BP24 - 48VMX-62-BP36 - 62VMX-78-BP39 - 78VMX-92-BP46 - 92VMX-112-BP56 - 112VMX-150-BP75 - 150VMX-160-BP80 - 160VMX-210-BP or -P105 - 210VMX-276-BP or -P138 - 275VMX-360-BP or -P181 – 361VMX-450-BP or -P225 – 450VMX-550-BP or -P275 – 550VMX-600-BP or -P300 - 600VMX-862-BP or -P431 - 862VMX-900-BP or -P450 - 900VMX-1006-BP or -P503 - 1006VMX-1250-BP or -P625 - 1250"When an induction motor is operated at any service factorgreater than 1.0, it may have efficiency, power factor andspeed different than those at rated load. Locked rotor torqueand current and breakdown torque will remain the same. Amotor operating continuously at any service factor greater than1.0 will have a reduced life expectancy compared to operatingat its nameplate horsepower."When using this feature, simply program the VMX SeriesService Factor (F002) to the nameplate rating. (See section5.6.1.) All other adjustments to the protection circuits are doneautomatically within the VMX Series.Selecting for Across the Line Bypass1.2.2If you need to be able to start the motor Across-the-Line whenthe VMX Series electronics are out of service, the starter canalso be selected based upon the rating of the BypassContactor. Some users may also elect to size their BypassContactors per NEMA guidelines. When doing this, pleaserefer to the Product Selection Guide for details and notes, andsee Appendix 5 for special considerationsregarding Overload Protection. Note:The VMX -BP Series starters include the ability to connect a drycontact directly to the Bypass Contactor coil control circuit. Theseterminals are covered when shipped and should be used ONLYwhen necessary for Emergency Bypass operation and with anexternal Overload Relay. See Appendix 5 for additional information.No field wiring to these terminals is necessary if this feature is notused.VMX Digital Solid State Soft Starter User Manual4 PageBuy: Phone 844-385-3099 Email:

Chapter 2 - Installation2.1Receiving and UnpackingUpon receipt of the product, you should immediately do the following: Carefully unpack the unit from the shipping carton and inspect it forshipping damage. If damaged, notify the freight carrier and file aclaim within 15 days of receipt. Verify that the model number on the unit matches your purchaseorder. Confirm that the ratings nameplate on the unit matches or is greaterthan the motor‟s HP and current rating with which it is to be used.2.2Choosing a LocationProper location of the VMX Series is necessary to achieve specifiedperformance and normal operational lifetime. The VMX Series shouldalways be installed in an area where the following conditions exist: Ambient operating temperature:Panel (open chassis) unit: 0 to 50 C (32 to 122 F)Enclosed unit: 0 to 40 C (32 to 104 F) Protected from rain, moisture and direct sun. Humidity: 5 to 95% non-condensing Free from metallic particles, conductive dust and corrosive gas. Free from excessive vibration. (below 0.5G) Open panel units must be mounted in the appropriate type ofenclosure. Enclosure size and type must be suitable to dissipateheat generated by the soft starter and any other componentsmounted inside with it. Units with –BP Bypass Contactors produce less heat than unitswithout. Throughout all sizes, maximum heat dissipation of theVMX -BP Series electronics, contactor coils and fans is less than50W. Units without the –BP Bypass Contactor (optional on 210A andabove), must have ventilation adequate for heat dissipation of theSCRs. This is estimated at 4.5 watts per running load amp. Forexample, a 200HP 460V motor with 240FLA, the maximum wattageloss of a starter w/o bypass will be 240 x 4.5, or 1080 watts. Theenclosure ventilation (or air conditioning) must be capable ofdissipating the amount of heat due to this wattage loss to maintainthe enclosure below temperature limits. Care should always be taken to maximize the available spaceinside of the enclosure. See section 2.5.1 or contact factory forassistance in sizing enclosures.2.3Initial Unit InspectionMake a complete visual check of the unit for damage that may haveoccurred during shipping and handling. Do not attempt to continueinstallation or start up the unit if it is damaged. Check for loose mechanical assemblies or broken wires which mayhave occurred during transportation or handling. Loose electricalconnections will increase resistance and cause the unit to functionimproperly. Prior to beginning the installation, verify that the motor and VMXSeries unit are rated for the proper amperage and voltage.VMX Digital Solid State Soft Starter User Manual5 PageBuy: Phone 844-385-3099 Email:

SERVICE WARNING!2.4Do not service equipment with voltage applied! The unit can be thesource of fatal electrical shocks! To avoid shock hazard,disconnect main power and control power before working on theunit. Warning labels must be attached to terminals, enclosure andcontrol panel to meet local codes. Use Lock Out tags such as theone shown when servicing equipment.2.5Mounting and CleaningWhen drilling or punching holes in the enclosure, cover the electricalassembly to prevent metal filings from becoming lodged in areas whichcan cause clearance reduction or actual electrical shorts. After work iscomplete, thoroughly clean, vacuum the area, and re-inspect the unit forforeign material.2.5.1 ClearancesMake sure there is sufficient clearance all around the unit for cooling,wiring and maintenance purposes. To conserve panel space, the VMXSeries – BP models were designed for close vertical clearances of only1 inch (25mm) on either side. A minimum horizontal clearance of 4”(100 mm) on the top and bottom is necessary to maximize effectiveairflow and cooling. Also the unit must be installed with its heat sink ribsoriented vertically and running parallel to the mounting surface. Keep inmind that these are minimums. Wiring may require more clearance,particularly on the bottom.1" minimum (25 mm)4" minimum (100 mm)VMX SeriesStarter4" minimum (100 mm)1" minimum (25 mm)Figure 2.5: VMX minimum mounting clearancesVMX Digital Solid State Soft Starter User Manual6 PageBuy: Phone 844-385-3099 Email:

WARNING!Remove all sources of power before cleaning the unit.In dirty or contaminated atmospheres, the unit should be cleaned on aregular basis to ensure proper cooling. Do not use any chemicals toclean the unit. To remove surface dust use clean, dry compressed aironly, 80 to 100 psi. A three-inch, high quality, dry paintbrush is helpful toloosen up the dust prior to using compressed air on the unit. Do not usewire brushes or other conductive cleaning materials2.6Power TerminationsAll line and load power terminations are to be made to tin plated copperBus Tabs located on each unit. Bus tabs are pre-drilled to acceptindustry standard bolts. Some sizes come with saddle clamp terminals,however the connecting lugs are the responsibility of the user.Motortronics recommends using crimp-on lugs, although mechanicallugs are suitable as well. The following diagrams show sizes of the bustab holes and critical spacing between them for determining the size oflug that can be used.Note: All wiring must be sized according to local code standards.VMX-62 VMX-112VMX-18 VMX-48LoadLineLineR/L1S/L2LoadT/L31.50"(38.07 mm)V/T2U/T1 W/T3/1.10"(27.92 mm) 0.19"(4.82 mm)LineLoad1.82"(46.19 mm)1.73"(43.91 mm) 0.38"(9.64 mm)0.45"(11.42 mm)Figure 2.6.1 Critical clearances for bus tab connections0.60"(15.23 mm)S/L21.23"(31.22 mm)R/L1LineU/T1T/L3W/T3V/T2Load1.13"(28.68 mm)Figure 2.6.2 Critical clearances for bus tab connectionsVMX Digital Solid State Soft Starter User Manual7 PageBuy: Phone 844-385-3099 Email:

2.6 Power Connections (cont.)VMX-150 VMX-160LineLoad1.52"(38.58 mm)1.54"(39.09 mm)2.81"(71.32 mm) 0.38"(9.64 mm)0.60"(15.23 mm)0.14"(3.55 mm)T/L3R/L1S/L2LineU/T1W/T3V/T2LoadFigure 2.6.3 Critical clearances for bus tab connectionsNote: Consult factory for bus tab critical dimensions for units 210Aand aboveVMX Digital Solid State Soft Starter User Manual8 PageBuy: Phone 844-385-3099 Email:

2.6.1 Power Terminals:Connection points for units of 160A and below are saddle clampssuitable for stranded wire. Connection points for units of 210A andabove are bus tabs with pre-drilled holes (see below). Use appropriatecompression or mechanical lugs for termination to these bus tabs.Suggested wire sizes and tightening torques for factory-suppliedconnectors for conductors rated for 75 C are shown in the chart below.Always consult local codes and industry standard practices for properwires sizes to accommodate voltage drop and ambient conditions.Table 2.6: VMX Series Wire Ranges and Torque BPVMX-48-BPCurrent RangeMin.- Max.9 - 1814 - 2819 - 3924 - 48SuggestedWire 36 - 6239 - 7846 - 9256 - 1124322VMX-150-BPVMX-160-BPVMX-210-BP or -PVMX-276-BP or -PVMX-360-BP or -PVMX-450-BP or -PVMX-550-BP or -PVMX-600-BP or -PVMX-862-BP or -PVMX-900-BP or -PVMX-1006-BP or -P75 - 15080 - 160105 - 210138 - 276180 - 360225 - 450275 - 550300 – 600431 – 862450 – 900503 - 100602/04/0300 kCMIL500 kCMIL2 x 250 kCMIL2 x 250 kCMILTBDTBDTBDTBDVMX-1250-BP or -PTighteningTorquein.-lbs.Screw / BoltSizeTighteningTorqueNmSuggestedWire Size2ISOmm6101616351 x M5(included)451 x M8(included)5801 x M8(included)92001 x 0.38" hole(M10)for DTBD70701201503002 x 1502 x 150TBDTBDTBDTBDTBDTBDTBD625 - 1250Note: TBD To Be Determined at a later dateTBDTBD4253535502.7Remote Keypad MountingThe keypad / operator interface unit can be remotely mounted up to 10‟(3 meters) away from the starter, i.e. on the enclosure door. A remotemounting kit is necessary, which consists of an adaptor plate, adoorframe for NEMA 1 or NEMA 12 enclosures and a pre-assembledribbon cable available in 1-meter length increments. Detailed assemblyinstructions and an enclosure cutout template are included with the kit.See Product Selection Guide for part numbers of the available kits.NEM A 1 orNEM A 12Door FrameFigure 2.7Remote Keypad Mounting KitComponents Adaptor Plate Ribbon Cable,1, 2 or 3 metersVM X StarterVMX Digital Solid State Soft Starter User Manual9 PageBuy: Phone 844-385-3099 Email:

2.8Dimensions (consult price catalog for enclosed units)Table 2.8: VMX Dimensions and WeightsOverallEnclosurePanel (open)with integralbypasscontactorPanel(open), es(mm)Weightlbs(kg)VMX-18-BP 204.7)7.00(177.8)0.22(5.6)13 (5.9)VMX-62-BP 3.25(336.6)6.75(171.5)0.28(7.1)23(10.4)VMX-150-BP (463.6)6.75(171.5)0.28(7.1)35(15.9)VMX -210-BP 38(695.5)10.75(273.1)0.40(10.2)90(40.9)VMX-361-BP (695.5)10.75(273.1)0.40(10.2)105(47.7)VMX-550-BP throughVMX .5)10.75(273.1)0.40(10.2)120(55)VMX-862-BP MX-1006-BP throughVMX .1)0.40(10.16)ContactFactoryModel NumberUnder 210A, use –BP version as shown aboveVMX-210-P 9)19.00(482.6)F dia.A D Figure 2.8: VMX Dimensions EBCVMX Digital Solid State Soft Starter User Manual10 P a g eBuy: Phone 844-385-3099 Email:

Chapter 3 - Motor Overload Protection3.1Solid State Overload ProtectionThe VMX Series Starter provides true U.L. listed I2t Thermal OverloadMOTOR FLA (F001)Protection as a built-in function of the main digital processor formaximum motor protection. It simulates the tripping action of a bimust be programmedmetallic overload relay, with the accuracy and repeatability of a digitalfor unit to operate!control system. It is adjustable over a wide range and can be easilyprogrammed for different trip curves.3.1.1 Thermal MemoryThe VMX Series microprocessor uses a sophisticated “ThermalRegister” in the digital memory to keep track of motor heating andcooling over time regardless of the starter‟s power status. By using nonvolatile memory, the VMX Series does not “forget” that the motor hasbeen running even if power to the starter is turned off and turned backon. Continuous overload protection is provided based on the truethermal condition of the motor.Examples:H 100100% Thermal Capacityremaining at restH 05757% Thermal Capacityremaining after starting(43% used)3.1.2 Thermal CapacityThe Thermal Register is displayed as a percentage. This percentage isthe motor‟s remaining thermal capacity. The percentage value begins at100, showing that the motor is cool (has 100% of its capacity available).As the motor heats up or moves toward an overload condition, thepercentage begins to drop. The Thermal Capacity is derived from theprogrammed motor nameplate Full Load Amps (FLA) in Function F001,the Service Factor rating in Function F002, and the Overload Trip Classin Functions F003 and F004. Setting these functions to the propervalues provides maximum protection and eliminates nuisance tripping.The Remaining Thermal Capacity can be viewed by using the UP orDOWN arrow keys when in the Status Display mode. From the defaultPhase A Current screen (dot on right side), press the UP arrow key 4times to display [H100] meaning there is 100% of the Thermal Capacity(H Heat capacity) remaining in the motor. After starting or running, themotor will use this capacity and the display will show a lower number.For example, after a cold start, the display may read [H065] whichindicates that the motor has 65% of its thermal capacity remaining (35%used). The Status Display screens cycle back to the beginning, so theDown arrow keys can access this display as well. 3.1.2.aMotor Full Load (FLA) SettingUse Function F001 to enter motor FLA as indicated on the motornameplate. (Do not calculate for service factor, this is programmedseparately in F002). Note:All VMX Series starters are shipped from the factory with F001 setto a default value of 0000. If F001 is left at the factory default, theunit will not operate. If the user attempts to start the VMX Serieswithout entering the motor nameplate FLA, the starter will Fault andthe display will read “nFLA” (no Full Load Amps).VMX Digital Solid State Soft Starter User Manual11 P a g eBuy: Phone 844-385-3099 Email:

3.1.3 Disabling the Overload ProtectionThe Overload Protection feature can be disabled if necessary. Whenusing external devices such as Motor Protection Relays or when theVMX Series is wired downstream from an existing starter, this featurecan be disabled to prevent conflicts with external overload protectiondevices. When the VMX Series is controlling multiple motors, the builtin Overload protection must be disabled and individual thermal overloadrelays must be installed on the motor leads going to each motor (seeappendix 5 for additional details). To disable the Overload Protectionfunction, use F005.WARNING!Do NOT disable Overload Protection unless another Thermal Overload Protectiondevice exists in the circuit for all three phases. Running a motor without OverloadProtection presents serious risk of motor damage or fire. 3.1.3.aManual ResetThe factory default setting is Manual Reset. This means that whenthe Overload Trip is activated, the starter cannot be restartedwithout pressing the Reset key. The Overload Trip will not resetuntil the motor cools down (see 3.1.3.d). The Manual Reset functionis also “trip free”. Holding in the Reset key will not prevent theOverload Trip from activating and protecting the motor. Note:When the Overload Trip activates, the Overload LED will be onsolid. When the motor cools down, the LED will begin to flash,indicating that the Overload Trip can be reset. 3.1.3.bAutomatic ResetIf Automatic Reset is necessary, change from Manual Reset toAutomatic Reset by using Function F005. (See Section 5 fordetails). In this mode, a 3-wire control circuit will be capable ofrestart when the VMX Series has reset itself after the cool downperiod.WARNING!Two-wire control systems may restart without warning when AutoReset of the overload protection is selected. Extreme cautionshould be exercised. To prevent automatic restarting with 2-wirecontrol systems, use external interlocking to provide sufficientwarning and safety to operators. A Warning Label similar to thatshown below (and the one provided in the packet with this manual)must be located where visible (on the starter enclosure and/or thedriven equipment) as required by local code.WARNING: MOTOR CONNECTED TO THIS EQUIPMENTMAY START AUTOMATICALLY WITHOUT WARNINGVMX Digital Solid State Soft Starter User Manual12 P a g eBuy: Phone 844-385-3099 Email:

Overload Protection During Bypass3.1.3.cWhen an integral Bypass Contactor is used to shunt power aroundthe SCRs in the VMX Series (as in the VMX -BP version),overload protection is maintained as long as the VMX Series isdirectly controlling the contactor. No additional Overload Relay isnecessary for normal operation.Caution:If a Bypass Contactor is added by the user in the field (i.e. 210A units and above), caremust be taken to ensure proper power routing to ensure functioning of the Overloadprotection. Consult factory for assistance. When the Bypass Contactor on a VMX -BP Series has beenselected to be used for Across-the-Line restart (reference section1.2.3), supplemental overload protection may be necessary. For thisapplication, refer to the External Overload Relay Applicationssupplement and wiring diagram in Appendix 5 and section 4.2.6.a. 3.1.3.dDynamic Reset CapacityThe VMX Series includes the ability to dynamically track theThermal Capacity needed for a successful restart after an overloadtrip. It averages the Thermal Capacity consumed in the previousthree successful starts, and calculates a Thermal Capacity to Start(viewed in Function F059). After tripping on Overload, the ThermalRegister must have regained the amount recorded in F059 before aReset will be allowed. If the display reads [ Inh] when attempting toreset an overload trip, it is indicating that the starter is Inhibited frombeing reset.Refer to details of Function F071 for information on emergencyoverride of lockouts such as this.3.2NEMA Class Trip CurvesNEMA Class trip curves are based on a common tripping point of 600%of motor Full Load Amps (FLA). Curves vary by the amount of timebefore the unit trips. As an example, a Class 20 curve will trip in 20seconds at 600% of FLA. The factory default setting of Class 10 will tripin 10 seconds at 600% of FLA.3.2.1 Dual Overload Trip CurvesThe VMX Series Soft Starter provides two separate Overload TripProtection Curves, one for starting and one for running conditions. Thestarter‟s At-Speed detection circuit determines when the motor hasreached full speed. When the At-Speed condition is reached, theoverload trip curve will shift from the Start to the Run level, asprogrammed in Functions F003 and

Equipment Ground Fault Protection Type: Residual Current Trip Range: 5 – 90% of unit CT ratio Trip Delay: 1 – 60 seconds Load Loss Trip Under Current Trip Level: 10 –90 % of motor FLA Trip Delay: 1 – 60 seconds Coa

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