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E6581301
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). 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 capacitances that can be reduced.
Note 1:Without the capacitor, the inverter does not comply with the EMC directive.
■ 200V/45kW - 400V/75kW models and smaller: Grounding capacitor switch
Warning
Prohibited
ᝳWhen attaching or detaching the capacitor, be sure to turn off power.
ᝳWhen the grounding capacitor is detached from the inverter with a capacity of 400V-3.7kW or
less, be sure to set the carrier frequency (EH) to 4kHz or less.
If the carrier frequency is set above 4kHz, 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 are 100 m or more in length with a capacity between 400V-5.5kW and
400V-18.5kW, be sure to set the carrier frequency (EH) to 4kHz or less.
If the carrier frequency is set above 4kHz, the inverter may overheat and become damaged.
ᝳWhen installing or operating the inverter within an ungrounded system or within a
high-resistance grounding system, set the grounding capacitor switch to Small.
Any other setting may result in a system malfunction or overheating.
*1: Refer to Section 1.3.1 for the
position of the switch.
*3: For 400V-3.7kW model and less, 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 (
EH
) at
4kHz or less according to the instructions when switching.
*1
*3
*3
200V 11kW, 15kW, 30kW~45kW
400V 22kW~75kW
200V 0.4kW~7.5kW, 18.5kW, 22kW
400V 0.75kW~18.5kW
To connect to the ground, push in.
(Factory default position)
To disconnect fom the ground, pull up.
Small
To change the capacitance to Large,
push in.
(Factory default position)
To change the capacitance to Small,
pull up.
Large
SmallLarge
200V
0.4kW
᳸
15kW
400V
0.75kW
ᝬ
18.5kW
200V
18.5kW
᳸
45kW
400V
22kW
ᝬ
75kW
*2: Refer to next pages for the
position of the switch.