Disposal, What to do about leak current | Toshiba VF-nC1 manual

E6581090

Circuit interrupting when two or more inverters are used on the same power line.

	(circuit
MCCB1	MCCB2 interrupting fuse)
	MCCB3
	MCCBn＋1

INV1

INV2

INVn

1

Breaking of selected inverter

There is no fuse in the inverter's main circuit. Thus, as the diagram above shows, when more than one inverter is used on the same power line, you must select interupting characteristics so that only the MCCB2 will trip and the MCCB1 will not trip when a short occurs in the inverter (INV1). When you cannot select the proper characteristics install a circuit interrupting fuse between the MCCB2 and the INV1.

■Disposal

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

1.4.3What to do about 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 leak 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.

(1) Leakage current from the inverter main unit

As compared with other types of inverters, a large amount of current leaks from your inverter when it is used in delta connection (with one phase grounded). Take this into consideration when selecting an earth leakage breaker.

<Leakage current in delta connection (one phase grounded)> (For reference only)

VFNC1-2001P to 2022P		: About 1mA
VFNC1S-2002P	to 2007P	: About 6mA
VFNC1S-1001P	to 1007P	: About 3mA
VFNC1S-2002PL to 2007PL		: About 11mA
VFNC1S-2015P	to 2022P	: About 3mA
VFNC1S-2015PL to 2022PL		: About 17mA

(2) Effects of leakage 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, leak 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 amounts during current detection with the CT.

Power supply

ELCB

ELCB

Inverter

M

Inverter M

Leakage current path across ground

A-11

Image 20

Toshiba VF-nC1 instruction manual Disposal, What to do about leak current, Leakage current from the inverter main unit

Contents

Industrial Inverter Safety precautions Limits in purpose General operation Transportation ‚ Installation Wiring Operations When retry function is selected inverter Attach warning labels ― Contents ― 10.1 Check purchased product Contents of the product codeRead first Name and function of each part Operation keypad panel Front panel Self-up terminal block VFNC1-2001P～2007P VFNC1-2015P～2022P VFNC1S-1007P VFNC1S-2015P～2022P Control circuit terminal block Same type of terminal board is provided for all models Motors Inverters Disposal What to do about leak currentLeakage current from the inverter main unit Effects of leakage current across ground Affects of leakage current across lines Remedies Installation Installation environment Examples of unapplicable chemicals and solvents Resistor How to install Installation location VFNC1S VFNC1 Installing more than one unit in a cabinet Connection Control and main power supply WiringStandard connections Preventing radio noise Standard connection diagram VF-nC1 When using V1/S3 terminal as a logic input terminal H DC reactor ＊ DCL option P0 ＊4 DC reactor＊5 Power supply and motor connections Description of terminalsMain circuit terminals Connections with peripheral equipment Control circuit terminals sink logic common CC VI/S3 Sink logic negative common/source logic positive common OUTFLA FLB Switching the input terminal logic between sink and source Simple operation Setting Simple operation of the VF-nC1Run / stop Frequency RUN Motor starts Motor stops slowdown stop Short F and CC terminals run forward Setting the frequency using the operation panel Hoqf Setting the frequency using external potentiometer Setting the frequency using current input 4-20mA Setting the frequency by serial communications Hoqf Setting the frequency using input voltage Basic VF-nC1 operations How to set parameters Setup parameters How to set a setup parameter KP KV How to set the basic parameters Steps in key entry for basic parameters How to set extended parameters Steps in key entry for extended parameters CWH GPF HTH Press the Enter key to display the setting of the parameter ITW CEE Parameters that cannot be changed while running Returning all parameters to standard default setting Kpkv Selecting an operation mode Command mode selectionFrequency setting mode selection Settings Meter setting and adjustment Function Adjustment scale with meter adjustment HO parameter Adjusting the meter in inverter stop stateFM/OUT Houn Standard default setting Setting acceleration/deceleration time Selecting forward and reverse runs operation panel onlyHT Forward/reverse selection Operation panel CEE Acceleration time 1 s FGE Deceleration time 1 s Parameter setting Maximum frequencyUpper limit and lower limit frequencies HJ Maximum frequency Hz XN Base frequency 1 Hz Selecting control modeBase frequency XD Explanation of terms Setting the electronic thermalSetting of motor electronic thermal protection level 1 VJT Setting the motor electronic thermal protection level 1 VJT Using a VF motor motor for use with inverterInverter over load characteristics Preset speed operation speeds in 15 steps Setting method Run/stopPreset speed frequency setting Motor 150%-overload time limit H Using other speed commands with preset speed command Eoqf Output signal-related parameters Output terminal settingExtended parameters FM/OUT terminal functions selection Parameter for specifying a frequency OFF Parameters related to terminal function selection Setting of contact input terminal function Connection method Switching between control logics Sink/Source selection Jog run Setting of output terminal functions Setting of switching terminals Basic parameters40MCHG OFF Analog signals for frequency setting Setting frequency command characteristics 0 voltage input Adjustment of 0~10Vdc voltage inputAdjustment of 4~20mAdc current input Starting frequency Starting frequency setting Hz Operation frequency DC braking Preset speed operation frequencies 8 to ～ H Preset speed operation frequencies 8 to 15 HzPWM carrier frequency Jump frequency Hz Jump width Hz Trip-less intensification During restart operation, the message TVT is displayed Start of motor during coasting Motor speed search function Application to a crane or hoist Inverter, motor and machine ・QEC ・QEN・GRJQ ・GTT Setting the PI control parameter Performing PI controlExternal connection Types of PI control interfaces Adjusting the PI control gain level Adjusting an analog command voltage Improving torque and speed characteristics Optimizing control characteristics 2 switching frequency Switching between acceleration and deceleration Acceleration/deceleration Current stall setting Stall prevention level Protection functions External trip stop by means of a terminal Emergency stop by means of the operation panel ①Press the Stop key Gqhh will blink Function Undervoltage trip Under voltage trip selection FM/OUT terminal selection 1 12 OT over-torque detection Setting methods Canceling the settingOperation panel parameters Analog input disconnection detection Selection of monitor display selection Communication function common serialChanging the standard monitoring item 16.1 Using RS232C/RS485 conversion units Setting up the communications functionData transmission specifications Communications parameters Common serial options Free notes Free notes Setting the operation frequency Variety of operation RSS4 Setting the operation mode Monitoring the operation status Status monitor modeSetting procedure eg. operation at 60Hz Key to change items displayed in the status monitor mode Display of trip information Example of call-up of trip information ⇔ Taking measures to satisfy the CE / UL / CSA Compliance with CE MarkingAbstract EMC directive 89/336/EEC 【Ex. Countermeasure main circuit wiring】 Compliance with EMC directive Model, noise filter inside Models without EMI filters EMFA2006ZEMFA2015Z EMFAS2011Z 【Operating with external signals】【Accessories for countermeasure】【Apply if needed】 Compliance with Installation Compliance with UL Standard and CSA StandardCompliance with Low voltage directive Compliance with Connection Motor thermal protection AIC Selection of wiring materials and devices Peripheral devices Selection of wiring devices THR Installation of a magnetic contactor Installation of an overload relayMagnetic contactor in the primary circuit Magnetic contactor in the secondary circuit Table of parameters and data 11.1 User parameters11.2 Basic parameters NN－WN VJT QNOUT NNWN LOW Extended parametersInput/output parameters Frequency parameters NN-WN Operation mode parameters Torque boost parameters Acceleration/deceleration time parameters Protection parameters Communication parameters Factory setting parameterOperation panel parameters Default settings by inverter rating Table of input terminal functions +SS1+AD2 +SS2+AD2+SS3+AD2 +SS4+AD2 Table of output terminal functions Order of precedence of combined functions Standard specifications SpecificationsModels and their standard specifications Self-cooling Forced LED External dimensions External dimensions/weightsExternal dimensions/weights FGE QER Trip causes/warnings and remediesCEE QER GRJ GRJ CPU QHHOqhh TVT UK UvqrUQ Restoring the inverter from a trip If the motor does not run while no trip message is displayed YES How to determine the causes of other problems Check points Inspection and maintenanceRegular inspection Periodical inspection Check items Replacement of expendable parts Standard replacement cycles of principal parts Making a call for servicing Keeping the inverter in storage Warranty Disposal of the inverter 2004-10