E6581386
A-12
1
1.3.3 Grounding capacitor switching method
The inverter is grounded through a capacitor. The leakage current from the inverter can be reduced using the selector
switch, switching bar or switching screw (depending on the model) on the main circuit terminal board. This switching
device is used to detach the capacitor from the grounding circuit or to reduce its capacitance.
Some models have capacitors that can be detached completely, while others have capacitors whose capacitances
can be reduced.
Note 1: Please note that, without the capacitor, the inverter does not comply with the EMC directive.
Note 2: When attaching or detaching the capacitor, be sure to turn off power.
200V/45kW - 400V/75kW models and smaller: Grounding capacitor switching switch
Prohibited
･When the grounding capacitor is detached from the inverter with a capacity of
400V-3.7/4.0kW or less, be sure to set the carrier frequency (
) at 4kHz or less.
If the carrier frequency is set above 4kHz, internal parts of the inverter may overheat and
become damaged.
･When the grounding capacitor is detached from the inverter and the cables connecting
the inverter to the motor is 100 m or more in length with a capacity between 400V-5.5kW
and 400V-18.5kW, be sure to set the carrier frequency (
) at 4kHz or less.
If the carrier frequency is set above 4kHz, internal parts of the inverter may overheat and
become damaged.
1: There are two places according to the
model.
For details, refer to Section 1.3.1.
*2: For 400V-3.7/4.0kW model and smaller, the switch is fixed
with a label saying “CF/SFr
4kHz.” If such a label is
affixed to your inverter, you should set the carrier frequency
(
) at 4kHz or less according to the instructions when
switching.
*1
*2
*2
200V 11kW, 15kW, 30kW~45kW
400V 22kW~75kW
200V 0.4kW~7.5kW, 18.5kW, 22kW
400V 0.75kW~18.5kW
Note: If you are using a 400V-3.7/4.0kW model or less or a model
with a capacity between 400V-5.5kW and 400V-18.5kW with it
connected to a motor through cables 100m or more in length,
you should set the carrier frequency (
) at 4kHz or less
when pulling up the switch. Be sure to read the above
To connect and ground the capacitor,
push in the button.
(Factory default position)
Pull up this part to detach the
capacitor to prevent it from being
Small
To change the capacitance from Small
to Large, push in the button.
(Factory default position)
To change the capacitance from Large
to Small, pull up the button.
Large
SmallLarge
200V
0.4kW
～
15kW
400V
0.75kW
～
18.5kW
200V
18.5kW
～
45kW
400V
22kW
～
75kW
Warning
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