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Toshiba VF-FS1 What to do about the leak current, Effects of leak current across ground, Remedies

Models: VF-FS1

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E6581381

■Disposal

If an inverter is no longer usable, dispose of it as industrial waste.

1.4.3What to do about the leak current

Warning

Current may leak through the inverter's input/output wires because of insufficient electrostatic capacity on the motor with bad effects on peripheral equipment.

The leakage current’s value is affected by the carrier frequency and the length of the input/output wires. Test and adopt the following remedies against leak current.

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(1) Effects of leak current across ground

Leakage current may flow not just through the inverter system but also through ground wires to other systems. Leakage current will cause earth leakage breakers, leakage current relays, ground relays, fire alarms and sensors to operate improperly, and it will cause superimposed noise on the CRT screen or display of incorrect current detection with the CT.

Power supply

ELCB

ELCB

Inverter

Inverter

M

M

Leakage current path across ground

Remedies:

1.If there is no radio-frequency interference or similar problem, detach the built-in noise filter capacitor, using the grounding capacitor disconnecting switch or tap. ⇒ See section 1.3.2-2.

2.Reduce PWM carrier frequency.

The setting of PWM carrier frequency is done with the parameter H.

Although the electromagnetic noise level is reduced, the motor acoustic noise is increased. 3. Use high frequency remedial products for earth leakage breakers.

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Toshiba VF-FS1 instruction manual What to do about the leak current, Effects of leak current across ground, Remedies, Elcb

Contents

Industrial Inverter Page Meanings of symbols Safety precautionsSafety precautions Explanation of markingsGeneral 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 Low loads and low inertia loads Braking a motor when cutting off power supplyOccurrence of instability Load that produces regenerative torqueBraking motor InvertersMeasures to protect motors against surge voltages Protecting inverters from overcurrentIf power supply distortion is not negligible Power factor correction capacitorOperating at other than rated voltage MCCB1Effects of leak current across ground What to do about the leak currentRemedies ElcbAffects 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 Wiring Control and main power supplyStandard connections Preventing radio noiseStandard connection diagram Standard connection diagram Description of terminals Power circuit terminalsControl circuit terminals Power circuitControl circuit terminals VIB VIAFLC FLAFLB PLC Logic switching Operations Hoqf Simplified Operation of the VF-FS1Eoqf Example of a Eoqf setting procedure How to start and stopStart and stop using the operation panel keys EOQF= Coast stopExample of a Hoqf setting procedure How to set the frequencyExample of operating a run from the panel HOQFFrequency setting Setting the frequency using the operation panel HOQF= or How to operate the VF-FS1 Mccb Page Basic VF-FS1 operations Setting monitor mode Mode for setting inverter parametersMode for monitoring all inverter status 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 Example of parameter setting Search and resetting of changed parameters I4WHow to search and reprogram parameters ITWHTH Setting a parameter, using the wizard function CWHCEE How Parameters of Quick setting wizard How to use the wizard functionJgcf How to use the history functionCWJ CW Parameters that cannot be changed while runningKpkv Returning all parameters to standard default settingHow to save/load the user setting parameters Page Automatic acceleration/deceleration Setting acceleration/deceleration timeBasic parameters CWK Manually setting acceleration/deceleration timeMethods of setting automatic acceleration/deceleration Function Adjustment range Default setting UP/DOWN Specifying an operation mode, using parametersEOF UP/DOWN HOFRES 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 selection HO Meter adjustment Meter setting and adjustmentHOUN= HounVF-FS1 ResolutionAdjustment scale with parameter HO Meter adjustment HOUN= Adjusting the meter in inverter stop stateProgrammed value Standard default settingVR Default setting E6581381 HT Forward/reverse run selection Operation panel operation Forward/reverse run selection Operation panel operationUpper limit and lower limit frequencies Maximum frequencyHJ Maximum frequency WN Upper limit frequency NN Lower limit 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 torque+ Motor constant must be set Precautions on vector controlEnergy-saving Operating a permanent magnet motorE6581381 Valid, Invalid XD Torque boost Setting the electronic thermalManual torque boost increasing torque boost at low speeds QNO Motor electronic thermal protection level Setting value Overload protection Overload stall Motor 150%-overload time limit H Inverter over load characteristicsThermal memory selection H Preset-speed operation speeds in 7 stepsUT UT Preset-speed operation frequencies UT UTUT UTBelow is an example of 7-step speed operation Low-speed signal output frequency Low-speed signalExtended parameters Input/output parameters Speed reach detection band Output of designated frequency reach signalDesignated frequency Output of set frequency speed reach signal VIA terminal function selection Input signal selectionChanging the functions of VIA terminal Modifying input terminal functions Terminal function selectionKeeping an input terminal function always active on Setting of contact input terminal function Connection with transistor output Connection method 1 A-contact inputExamples of application Modifying output terminal functionsSink Negative logic / Source Positive logic input RY RC Assigning two functions to an output terminalAssigning one function to an output terminal RY-RC Hdry Holding the output of signals in on statusInput terminal function FLA-FLB-FLC Comparing the frequency command valuesBasic parameters Switching motor characteristics via terminal inputAD2 VF2 MOT2 OCS2 OFF Setting of switching terminalsFrequency priority selection 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 signalsFrequency adjustment range About the setting of the initial up/down frequencyMinimum unit of frequency adjustment About the change of the initial up/down frequencyFine adjustment of frequency setting signal Starting frequency setting 2 Run/stop control with frequency setting signalsOperation frequency Starting frequencyDC braking DC brakingOFF Jump frequency jumping resonant frequencies Bumpless operation selection Bumpless operationPWM carrier frequency 0.75kW 15kW E6581381 Auto-restart control selection Trip-less intensificationAuto-restart Restart of coasting motor 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 controlTypes of PID control interfaces Setting PID controlAdjusting the PID control gain level I-gain adjustment parameter P-gain adjustment parameterSetting the time elapsed before PID control starts D-gain adjustment parameterAdjusting analog command voltages 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 stall Inverter trip retention selection Inverter trip retention Emergency stop Emergency DC braking time Emergency stopExternal trip stop via terminals Emergency stopping from the operation panel Output phase failure detection mode selection Output phase failure detection Input phase failure detection mode selection Input phase failure detectionControl mode for small current Detection of output short-circuit during start-up Detection of output short-circuitOver-torque trip OFF On OFF Cumulative operation time alarm setting Cumulative operation time alarm settingOver-voltage stall protection level Over-voltage stall protection levelUndervoltage trip Undervoltage trip/alarm selection Trip at VIA low level input mode Trip at VIA low level input modeParts replacement alarms Motor PTC thermal protection Evasion from Overvoltage and Imput phase failure NNWN Forced fire-speed control functionCalibration of analog outputs Adjustment parametersExample of setting Operation panel parameter Prohibition of key operations and parameter settingsResetting method Current / voltage unit Changing the unit to a An example of setting when HJ is 80 and H is Free pressing a panel key once Free panel display When H is not 0.00, and H is not 0 disabledChanging the steps in which the value displayed changes Standard monitor display selection Changing the item displayed by defaultChanging the display format while power is on Selection of operation panel stop pattern Integral output powerDisplay of the head of the parameters Selection of operation panel stop patternTitle Error by disconnection Setting of common functionCommunication function Common serial Communication rate Communication function parameters Common serial options E6581381 Setting the communication functions Using the RS485Transmission specifications Example of connection for RS485-communicationWiring Permanent magnetic motors Parameters for optionsPage Applied operation Setting the operation frequencyHOQF HOQFHoqf P24Hoqf PLC VIA SS3 VIB RES RES SC/LC Setting the operation modeRES SC/LC PLC VIA VIB Monitoring the operation status Status monitor modeStatus monitor under normal conditions LEDVIA RES KKPgtt ⇔ Display of detailed information on a past trip Display of trip information Display of trip informationTrip code display 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 About the EMC directive How to cope with the CE directiveMeasures to satisfy the standards Measures to satisfy the EMC directive Three-phase 400V class About the low-voltage directive Example of wiringCompliance with UL Standard and CSA Standard Compliance with InstallationMeasures to satisfy the low-voltage directive Compliance with ConnectionAIC a AIC, Fuse and Wire sizesMotor thermal protection 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 11.2 Basic parameters Table of parameters and data11.1 User 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 Standard specifications SpecificationsModels and their standard 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 maintenanceCheck items Periodical inspectionCheck points 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 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