Hitachi L300P Manuale Utente Pagina 59

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Step-by-Step Basic Installation
Inverter Mounting
and Installation
2–20
Step 7: The process of motor selection is beyond the scope of this manual. However, it must be
a three-phase AC induction motor. It should also come with a chassis ground lug. If the motor
does not have three power input leads, stop the installation and verify the motor type. Other
guidelines for wiring the motor include:
Use an inverter-grade motor for maximum motor life (1600V insulation).
For standard motors, use an output filter if the wiring between the inverter and motor
exceeds 10 meters in length.
Simply connect the motor to the terminals
[U/T1], [V/T2], and [W/T3] indicated on
the inverter to the right. This is a good time
to connect the chassis ground lug on the
drive as well. The motor chassis ground
must also connect to the same point. Use a
star ground (single-point) arrangement, and
never daisy-chain the grounds (point-to-
point).
Use the same wire gauge on the motor and
chassis ground wiring as you used on the
power input wiring in the previous step.
After completing the wiring:
Check the mechanical integrity of each
wire crimp and terminal connection.
Replace the front panel and secure the
retention screw firmly.
Logic Control
Wiring
After completing the initial installation and powerup test in this chapter, you may need to wire
the logic signal connector for your application. For new inverter users/applications, we highly
recommend that you first complete the powerup test in this chapter without adding any logic
control wiring. Then you will be ready to set the required parameters for logic control as
covered in Chapter 4, Operations and Monitoring.
Step 8: After mounting and wiring the inverter,
remove any protective material covering the
inverter ventilation openings from Step 3. This
includes covers over the side ventilation ports
as well as the fan outlet area.
CAUTION: Failure to remove all vent opening
covers before electrical operation may result in
damage to the inverter.
7
Wire the Inverter
Output to Motor
To Po w er
Source
To MotorTo Chassis
Ground
8
Uncover the
Vents
Uncover the ventilation slots,
both sides
Uncover the fan outlet vents
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