Amtech Axpert-Eazy Series Instruction Manual page 15

Use a shield cable for the AC DRIVE and motor wiring and connect the screen to the AC DRIVE's
terminal.
When using the control circuit wiring and power circuit wiring in parallel, separate the wiring by
300mm (11.8") or more or pass each of the wiring through separate metal conduits. If the control
circuit wiring and main circuit wiring intersect, make sure that they intersect at a right angle.
(Note 6) AC DRIVE output
Do not insert a power factor improvement capacitor on the output side of the AC DRIVE. When
inserting a magnetic contactor on the output side of the AC DRIVE, prepare a sequence control
circuit so that the magnetic contactor will not open and close when the AC DRIVE is running.
Directly connect only motor to the AC DRIVE load and do not connect through a transformer
etc...without consulting Amtech.
(Note 7) Grounding
Always ground the AC DRIVE unit according to the regulations of the country where the AC
DRIVE is being used to ensure personnel safety in all circumstances, and to reduce
electromagnetic emission and pickup.
Make sure that grounding conductors are adequately sized as required by safety regulations.
In a multiple-drive installation, connect each drive separately to protective earth.
In European CE compliant installations and in other installations where EMC emissions must be
minimized, make a 360° high frequency grounding of cable entries in order to suppress
electromagnetic disturbances.
In addition, connect the cable shields to protective earth (PE) in order to meet safety regulations.
As the normal leakage current of the drive is higher than 3.5 mA AC or 10 mA
DC (stated by EN 50178, 5.2.11.1), a fixed protective earth connection is required.
(Note 8) AC DRIVE output surge voltage
As the AC DRIVE output cable is lengthened, the surge voltage applied on the motor also
increases. If the wiring between the AC DRIVE and motor exceeds 20meters (65.6'), connect a
surge absorber dedicated for the AC DRIVE output.
(Note 9) DCL
Always short across L+1 and L+2 when not using the DCL (factory setting state). When
connecting the optional DCL, connect it to L+1 and L+2. Twist the wiring to the DCL, and keep the
wiring length to 5meters (16.4') or less.
(Note 10) DB Unit
When connecting an optional DB unit, make the connections as shown in the main circuit wiring.
The DB unit and AC DRIVE unit will damage if the connections are incorrect. Twist the wiring to
the DB unit, and keep length to 3meters (9.8') or less.
When using the external DB unit, use the overload detection relay or thermal relay to protect the
DB resistor and AC DRIVE.
(Note 11) Surge absorber
Install a surge absorber on the magnetic contactor and relay coils installed near the AC DRIVE.
(Note 12) Voltage Selection for the auxiliary equipment Power Supply
Ensure appropriate tapping for the control transformer, which provides the power supply to the
auxiliary equipments like fan/blower, soft charge contactor etc.
Axpert-Eazy AC Variable Frequency Drive
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2.7