9-2
9.3.2 Recommended installation procedure
To make the machinery or equipment fully compliant with the EMC Directive, have certified technicians wire the motor and
inverter in strict accordance with the procedure described below.
In the case of EMC filter built-in type of inverter
1) Mount the inverter on a grounded panel or metal plate. Use shielded wires for the motor cable and route the cable as short
as possible. Firmly clamp the shield to the metal plate to ground it. Further, connect the shielding layer electrically to the
grounding terminal of the motor. Separate the input and output wires as far as possible, using wiring guides.
For inverters with a capacity of 5.5 to 11 kW, connect the input grounding wire to the grounding terminal at the front,
left-hand side, and the output grounding wire to that on the main circuit terminal block. (Refer to Figure 9.1.)
Figure 9.1 Wiring for EMC Filter Built-in Type Inverters with a Capacity of 5.5 to 11 kW
2) For connection to inverter's control terminals and for connection of the RS-485 communication signal cable, use shielded
wires. As with the motor, clamp the shields firmly to a grounded panel.
3) If noise from the inverter exceeds the permissible level, enclose the inverter and its peripherals within a metal panel as
shown in Figure 9.2.
Figure 9.2 Mounting the Inverter in a Metal Panel
In case an EMC-compliant filter (optional) is externally used
1) Mount the inverter and the filter on a grounded panel or metal plate. Use shielded wires for the motor cable and route the
cable as short as possible. Firmly clamp the shields to the metal plate to ground them. Further, connect the shielding
layers electrically to the grounding terminal of the motor.
2) For connection to inverter's control terminals and for connection of the RS-485 communication signal cable, use shielded
wires. As with the motor, clamp the shields firmly to a grounded panel.
3) If noise from the inverter exceeds the permissible level, enclose the inverter and its peripherals within a metal panel as
shown in Figure 9.3.
Figure 9.3 Mounting the Inverter with EMC-compliant Filter in a Metal Panel
In
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