22
(8) A filter capacitor is required in the PWM sine wave mode. It is not used in the 120-degree conduction mode.
Be sure to use the filter capacitor specified by Toyo Denki.
(9) Never connect the GND and COM terminals of the control circuit to the ground terminal.
(10) In the factory default, the control input terminal [START] and multifunction input terminals [MI1] through
[MI5] are set to PS common input (source input). When changing them to GND common input (sync input), remove
a jumper socket on the control board <VFC66R-Z> from [CN-SO] and then attach it to [CN-SI].
Changing a short-circuit wire
To use the VF66R-31544 or 16044 converter at a power supply voltage of 460 V,
you need to change a short-circuit wire.
* Notes for connecting multiple inverters to the converter
1. Up to five inverters can be connected to a single converter.
Be sure to select the converter having a rated capacity larger than the total capacity of inverters to
use.
For example, when total five 400 V class inverters of 11, 15, 22, 37 and 45 kW are used, the total capacity
is 130 kW and therefore VF66R-16044 should be selected.
Note that in using the PWM sine wave mode, the effect of suppressing distortion of power supply current
is decreased at a capacity half the converter rated capacity or less. In this case, it is possible to
use as a converter. To produce the harmonic suppression effect, however, it is recommended that the load
on the converter be more than half of the rated capacity.
2. To use the converter as a common converter for multiple inverters, connection of a resistor between the
terminals R and RR may be needed depending on the number of inverters to be connected.
For the resistance value and model, contact us.
Danger
Wiring
●
Never touch the terminals while the converter is energized. A voltage is applied to the converter output terminals even in
the stopped state.
Otherwise, it can result in a risk of electric shock.
RA1
MCA
RA
Power supply voltage used for the converter
・
380 to 440 V: Short circuit between [MCA] and [RA] on the
terminal block shown on the right.
・
460 V: Short circuit between [MCA] and [RA1] on the terminal
block shown on the right.