Omron Healthcare VARISPEEDF7 EN-13, „Wiring the Output Side of the Main Circuit, Ground Wiring

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•If an earth leakage breaker is used, it should be able to detect all kinds of current in order to ensure a safe earth leakage current detection

•A magnetic contactor or other switching device can be used at the inverter input. The inverter should not be powered up more than once per hour.

•The input phases (R/S/T) can be connected in any sequence.

•If the Inverter is connected to a large-capacity power transformer (600 kW or more) or a phase advancing capacitor is switched nearby, an excessive peak current could flow through the input power circuit, causing an inverter damage. As a countermeasure install an optional AC Reactor at the inverter input or a DC reactor at the DC reactor connection terminals.

•Use a surge absorber or diode for inductive loads near the Inverter. Inductive loads include mag- netic contactors, electromagnetic relays, solenoid valves, solenoids, and magnetic brakes.

„Wiring the Output Side of the Main Circuit

The following precautions should be considered for the output circuit wiring.

•Never connect any power source to the inverter output terminals. Otherwise the inverter can be damaged.

•Never short or ground the output terminals. Otherwise the inverter can be damaged.

•Do not use phase correction capacitors. Otherwise the inverter and capacitors can be damaged.

•Check the control sequence to make sure, that the magnetic contactor (MC) between the Inverter and motor is not turned ON or OFF during inverter operation. If the MC is turned ON during the Inverter is operation, a large inrush current will be created and the inverter’s overcurrent protec- tion may operate.

„Ground Connection

The following precautions should be considered for the ground connection.

•Do not share the ground wire with other devices, such as welding machines or power tools.

•Always use a ground wire, that complies with technical standards on electrical equipment and minimize the length of the ground wire.

Leakage current is caused by the Inverter. Therefore, if the distance between the ground elec- trode and the ground terminal is too long, potential on the ground terminal of the Inverter will become unstable.

•When more than one Inverter is used, do not to loop the ground wire.

OK

NO

Fig 7 Ground Wiring

„Control Circuit Wiring Precautions

Consider the following precautions for wiring the control circuits.

•Separate control circuit wiring from main circuit wiring (terminals R/L1, S/L2, T/L3, B1, B2, U/T1, V/T2, W/T3, B1, B2, , 1, 2, and 3, PO, NO) and other high-power lines.

•Separate wiring for control circuit terminals MA, MB, MC, M1 to M6 (relay outputs) from wiring to other control circuit terminals.

•If an optional external power supply is used, it should be a UL Listed Class 2 power supply.

•Use twisted-pair or shielded twisted-pair cables for control circuits to prevent operating faults.

•Ground the cable shields with the maximum contact area of the shield and ground.

•Cable shields have to be grounded on both cable ends.

EN-13

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Contents VARISPEED F7 F7Z Quick Start Guide Table of Contents EN-2 ‹ Safety Precautions and Instructions EN-3„ Electrical Connection EN-4‹ EMC Compatibility „ NotesEarthing the cable shield with metal clips EN-5„ Laying Cables EN-6 ‹ Mechanical Installation„ Checking the Installation Site „ Unpacking the InverterEN-7 „ Installation Orientation„ Installation of Inverters and EMC filters EN-8 ‹ Electrical Connection „Wiring the InverterWiring Diagram „Control Circuit Terminals EN-9„Main Circuit Terminals Flywheel Diode Connection EN-10During run no Closed during Run Function External Power Source Sinking Mode NPN „ Sinking/Sourcing Mode NPN/PNP SelectionSinking / Sourcing Mode and Input Signals EN-11Input Fuse Selection ‹ Wiring Main Circuit InputsEN-12 Ground Wiring „Wiring the Output Side of the Main Circuit„Control Circuit Wiring Precautions EN-13„Digital Operator Keys EN-14‹ Digital Operator Display optional ‹ Start Up Procedure EN-15‹ Autotuning ‹ Before Power Up‹ Display after Power Up „ Setting the Autotuning Mode„Other Alarms and Faults During Autotuning EN-17User Parameter EN-18Vmax EN-19Fmax VbaseEN-20 Limit only OLV and CLV‹ General Faults and Alarms EN-21OL1 EN-22OH1 OL2‹ Operator Programming Errors EN-23OPE08 ‹ Autotuning FaultsEN-24

VARISPEEDF7 specifications

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