Toshiba Tosvert VF-AS1 - Manual (Page 28)

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) 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
Danger
Prohibited
If you are using an inverter with a capacity of 400V-3.7/4.0kW or less or with a capacity
between 400V-5.5kW and 400V-18.5kW, if the cables connecting the inverter to the motor is
100 m or more in length, and if the grounding capacitor is detached from the inverter, be
sure to set the carrier frequency (EH) 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 (EH) 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 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 (EH) at 4kHz or less when
pulling up the switch. Be sure to read the above precaution.
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 grounded.
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
Small Large