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Toshiba VF-FS1 Inverters, Braking motor, Measures to protect motors against surge voltages

Models: VF-FS1

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E6581381

Braking motor

When using a braking motor, if the braking circuit is directly connected to the inverters's output terminals, the brake cannot be released because of the lowered starting voltage. Therefore, when using a braking motor, connect the braking circuit to the inverter's power supply side, as shown in the figure below. Usually, braking motors produce larger noise in low speed ranges.

Note: In the case of the circuit shown on the below, assign the function of detecting low-speed signals	1
to the RY and RC terminals. Make sure the parameter H is set to (factory default
setting).

Measures to protect motors against surge voltages

In a system in which a 400V-class inverter is used to control the operation of a motor, very high surge voltages may be produced. When applied to the motor coils repeatedly for a long time, may cause deterioration of their insulation, depending on the cable length, cable routing and types of cables used. Here are some examples of measures against surge voltages.

(1)Lower the inverter’s carrier frequency.

(2)Set the parameter H (Carrier frequency control mode selection) to or .

(3)Use a motor with high insulation strength.

(4)Insert an AC reactor or a surge voltage suppression filter between the inverter and the motor.

1.4.2Inverters

Protecting inverters from overcurrent

The inverter has an overcurrent protection function. The programmed current level is set to the inverter's maximum applicable motor. If the motor used has a small capacity, the overcurrent level and the electronic thermal protection must be readjusted. If adjustment is necessary, see 5.12, and make adjustments as directed.

Inverter capacity

Do not use a small-capacity (kVA) inverter to control the operation of a large-capacity motor (two-class or more larger motor), no matter how light the load is. Current ripple will raise the output peak current making it easier to set off the overcurrent trip.

A-15

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Toshiba VF-FS1 Inverters, Braking motor, Measures to protect motors against surge voltages, Inverter capacity

Contents

Industrial Inverter Page Explanation of markings Safety precautionsMeanings of symbols Safety precautionsGeneral Operation Wiring Transportation & installationOperations Maintenance and inspection When retry function is selected inverterAttach warning labels DisposalII. Introduction Features Contents  E6581381 Iii Check product purchase Read firstContents of the product Outside view Names and functionsBottom Power circuit terminal board Power circuit and control circuit terminal boardsVFFS1-2004 ∼ 2037PM VFFS1-4004 ∼ 4055PL E6581381 E6581381 Grounding capacitor disconnecting switch and taps AWG Control circuit terminal boardHow to open the front terminal board cover-18.5kW or less How to open the front terminal board cover-22kW or More Motors Load that produces regenerative torque Braking a motor when cutting off power supplyLow loads and low inertia loads Occurrence of instabilityProtecting inverters from overcurrent InvertersBraking motor Measures to protect motors against surge voltagesMCCB1 Power factor correction capacitorIf power supply distortion is not negligible Operating at other than rated voltageElcb What to do about the leak currentEffects of leak current across ground RemediesAffects of leakage current across lines Installation environment Installation5cm Standard installation Side-by-side installation How to installOperating motor Calorific Values w Installing more than one unit in a cabinet Page Connection Preventing radio noise Control and main power supplyWiring Standard connectionsStandard connection diagram Standard connection diagram Description of terminals Power circuit terminalsPower circuit Control circuit terminalsControl circuit terminals VIB VIAFLA FLBFLC PLC Logic switching Operations Simplified Operation of the VF-FS1 EoqfHoqf Coast stop How to start and stopExample of a Eoqf setting procedure Start and stop using the operation panel keys EOQF=HOQF How to set the frequencyExample of a Hoqf setting procedure Example of operating a run from the panelFrequency setting Setting the frequency using the operation panel HOQF= or How to operate the VF-FS1 Mccb Page Setting monitor mode Mode for setting inverter parameters Mode for monitoring all inverter statusBasic VF-FS1 operations Flow of status monitor mode Basic parameters Extended parameters User parameters How to set parametersChanges the parameter setting Saves the changed value How to set the basic parametersHow to set extended parameters ITW Search and resetting of changed parameters I4WExample of parameter setting How to search and reprogram parametersSetting a parameter, using the wizard function CWH CEEHTH How Parameters of Quick setting wizard How to use the wizard functionHow to use the history function CWJJgcf CW Parameters that cannot be changed while runningReturning all parameters to standard default setting How to save/load the user setting parametersKpkv Page Setting acceleration/deceleration time Basic parametersAutomatic acceleration/deceleration Manually setting acceleration/deceleration time Methods of setting automatic acceleration/decelerationCWK Function Adjustment range Default setting UP/DOWN HOF Specifying an operation mode, using parametersUP/DOWN EOFRES PLC VIA VIB OFF Setting mode Switching of commands and references Selection of operation modeCommand mode selection Preset-speed operation Frequency setting mode selectionHoun Meter setting and adjustmentHoun Meter selection HO Meter adjustment HOUN=Resolution Adjustment scale with parameter HO Meter adjustmentVF-FS1 HOUN= Adjusting the meter in inverter stop stateStandard default setting VR Default settingProgrammed value E6581381 HT Forward/reverse run selection Operation panel operation Forward/reverse run selection Operation panel operationWN Upper limit frequency NN Lower limit frequency Maximum frequencyUpper limit and lower limit frequencies HJ Maximum frequencyXN Base frequency XNX Base frequency voltage Base frequencyRV V/F control mode selection Selecting control modeSetting for fans and pumps Constant torque characteristicsMotor constant must be set Increasing starting torqueOperating a permanent magnet motor Precautions on vector control+ Motor constant must be set Energy-savingE6581381 Valid, Invalid Setting the electronic thermal Manual torque boost increasing torque boost at low speedsXD Torque boost Motor electronic thermal protection level QNO Setting value Overload protection Overload stall Motor 150%-overload time limit H Inverter over load characteristicsPreset-speed operation speeds in 7 steps UT UT Preset-speed operation frequenciesThermal memory selection H UT UTUT UTBelow is an example of 7-step speed operation Input/output parameters Low-speed signal Low-speed signal output frequency Extended parameters Speed reach detection band Output of designated frequency reach signalDesignated frequency Output of set frequency speed reach signalInput signal selection Changing the functions of VIA terminal VIA terminal function selection Terminal function selection Keeping an input terminal function always active onModifying input terminal functions Setting of contact input terminal function Connection with transistor output Connection method 1 A-contact inputModifying output terminal functions Sink Negative logic / Source Positive logic inputExamples of application Assigning two functions to an output terminal Assigning one function to an output terminalRY RC RY-RC Holding the output of signals in on status Input terminal functionHdry FLA-FLB-FLC Comparing the frequency command valuesBasic parameters Switching motor characteristics via terminal inputSetting of switching terminals Frequency priority selectionAD2 VF2 MOT2 OCS2 OFF Automatic switching by frequency command External switching Input terminal function 38 Fchg enabledSetting frequency command characteristics VIA, VIB terminals 10Vdc voltage input adjustment VIA, VIBSetting of frequency with the input from an external contact Adjustment with pulse signals Parameter-setting example Sample sequence diagram 1 Adjustment with continuous signalsAbout the change of the initial up/down frequency About the setting of the initial up/down frequencyFrequency adjustment range Minimum unit of frequency adjustmentFine adjustment of frequency setting signal Starting frequency 2 Run/stop control with frequency setting signals Starting frequency setting Operation frequencyDC braking DC brakingOFF Jump frequency jumping resonant frequencies Bumpless operation selection Bumpless operationPWM carrier frequency 0.75kW 15kW E6581381 Trip-less intensification Auto-restart Restart of coasting motor Auto-restart control selection Motor speed search at starting Restarting motor during coasting Motor speed search function Instantaneous power failure coast stop selection Instantaneous power failure coast stop selection Retry selection Selecting the number of times Retry functionE6581381 Avoiding overvoltage tripping Output voltage adjustment/Supply voltage correction Reverse-run prohibition Canceling the operation command Droop gain  Droop insensitive torque band Droop controlE6581381 External connection Conducting PID controlSetting PID control Adjusting the PID control gain levelTypes of PID control interfaces I-gain adjustment parameter P-gain adjustment parameter D-gain adjustment parameter Adjusting analog command voltagesSetting the time elapsed before PID control starts Setting motor constants Setting motor constantsSet the auto-tuning parameter H to Auto-tuning enabled E6581381 Setting motor constants 2 Details E6581381 Selecting an acceleration/deceleration pattern Acceleration/deceleration timeSwitching acceleration/deceleration time 1 E6581381 Protection functions Setting motor electronic thermal protection Stall prevention level Setting current stallInverter trip retention  Inverter trip retention selection Emergency stopping from the operation panel Emergency stop Emergency stop Emergency DC braking time External trip stop via terminals Output phase failure detection mode selection Output phase failure detectionInput phase failure detection Control mode for small current Input phase failure detection mode selection Detection of output short-circuit during start-up Detection of output short-circuitOver-torque trip OFF On OFF Over-voltage stall protection level Cumulative operation time alarm setting Cumulative operation time alarm setting Over-voltage stall protection levelUndervoltage trip Undervoltage trip/alarm selectionTrip at VIA low level input mode Parts replacement alarms Trip at VIA low level input mode Motor PTC thermal protection Evasion from Overvoltage and Imput phase failure NNWN Forced fire-speed control functionAdjustment parameters Example of settingCalibration of analog outputs Prohibition of key operations and parameter settings Resetting methodOperation panel parameter Current / voltage unit Changing the unit to a An example of setting when HJ is 80 and H is When H is not 0.00, and H is not 0 disabled Changing the steps in which the value displayed changes Free pressing a panel key once Free panel display Changing the item displayed by default Changing the display format while power is on Standard monitor display selection Selection of operation panel stop pattern Integral output powerSelection of operation panel stop pattern Display of the head of the parametersTitle Communication rate Setting of common functionError by disconnection Communication function Common serialCommunication function parameters Common serial options E6581381 Example of connection for RS485-communication Using the RS485Setting the communication functions Transmission specificationsWiring Permanent magnetic motors Parameters for optionsPage HOQF Setting the operation frequencyApplied operation HOQFP24 Hoqf Hoqf PLC VIA SS3 VIB RES RES SC/LC Setting the operation modeRES SC/LC PLC VIA VIB LED Status monitor modeMonitoring the operation status Status monitor under normal conditionsVIA RES KKPgtt ⇔ Display of detailed information on a past trip Display of trip information Trip code displayDisplay of trip information Example of call-up of trip information Display of trip information at the occurrence of a tripInput terminal KK FE06 OFF Cause of the trip is displayed E6581381 Page How to cope with the CE directive Measures to satisfy the standardsAbout the EMC directive Measures to satisfy the EMC directive Three-phase 400V class About the low-voltage directive Example of wiringCompliance with Connection Compliance with InstallationCompliance with UL Standard and CSA Standard Measures to satisfy the low-voltage directiveAIC, Fuse and Wire sizes Motor thermal protectionAIC a Peripheral devices Selection of wiring materials and devicesInput current a Selection of wiring devicesMagnetic contactor in the primary circuit Installation of a magnetic contactorMagnetic contactor in the secondary circuit Installation of an overload relayOptional external devices Page Table of parameters and data 11.1 User parameters11.2 Basic parameters Houn UT Input/output parameters Extended parametersFrequency parameters NNWN Operation mode parameters Torque boost parameters Protection parameters Acceleration/deceleration time parameters Operation panel parameters Output parametersCommunication parameters PM motor parameters Default settings by inverter ratingAD2 Table of input terminal functionsOHN LLN Table of output terminal functionsUCN Pidfn Order of precedence of combined functions Specifications Models and their standard specificationsStandard specifications Common specification Display Outside dimensions and mass Outside dimensions and massFig.A Outline drawingFig.E Trip causes/warnings and remedies Before making a service call Trip information and remediesQR GTT QHH Restoring the inverter from a trip If the motor does not run while no trip message is displayed How to cope with parameter setting-related problems How to determine the causes of other problemsPage Regular inspection Inspection and maintenancePeriodical inspection Check pointsCheck items Replacement of expendable parts Standard replacement cycles of principal parts Keeping the inverter in storage Making a call for servicingPage Warranty Disposal of the inverter Page Toshiba