Hitachi SJ7002 Series Instruction Manual page 68

2–26
Step-by-Step Basic Installation
8
Wire the Inverter
Output to Motor
Logic Control
Wiring
9
Uncover the
Inverter Vents
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).
Inverter
Inverter
Inverter
Inverter
Inverter
Inverter
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.
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.
User
grounding
bolt
To power
source
Uncover the fan outlet vents
Uncover the ventilation slots, both sides
To chassis To motor
ground