![YASKAWA CIMR-ACA Series Скачать руководство пользователя страница 367](http://html1.mh-extra.com/html/yaskawa/cimr-aca-series/cimr-aca-series_instruction-manual_907553367.webp)
10
-6
Required Time to be Ready
The MxC needs one second more than general-purpose inverters to prepare for operation. Be careful of this
delay if using an external reference input.
* This time is required if no optional device is used with the MxC. If an optional transmission device is used, the time required for the MxC to be ready for
operation will vary in accordance with the start up time of the optional transmission card.
Number of Motors
An MxC is capable of operating only one motor. Do not use a single MxC to operate several motors.
Improving the Power Factor
No AC reactor or DC reactor is required to improve the power factor.
Selection of Power Capacity
Use a power supply that is greater than the rated input capacity (kVA) of the MxC. If the power is lower than
the rated capacity of the MxC, the device will be unable to run the application properly and a fault will occur.
The input capacity of the MxC,
S
CONV
(kVA), can be calculated by the following formula.
S
CONV
=
×
I
in
×
V
in
÷
1000
(
I
in
: MxC Rated input current [A],
V
in
: Applicable power line-to-line voltage [V]
)
Connection to Power Supply
The total impedance of the power supply and wiring for the rated current of the MxC is %Z = 10% or more. If
the impedance of the power supply is too large, then power voltage distortion may occur. If the wiring is too
long, then be sure that proper preventative measures such as thick cables or series wiring have been taken to
lower the impedance of wiring.
Precaution on Using Peripheral Devices
If installing a noise filter on the power-supply side of the MxC, use a specified noise filter such as a Finemet
zero-phase reactor.
When Using a Generator as a Power Supply
•
Select the generator capacity approximately twice as large as the MxC input power supply capacity. For
further information, contact your Yaskawa representative.
•
Set the deceleration time or load so that the regenerative power from the motor will be 10% or less of the
generator capacity.
When a Phase Advance Capacitor or Thyristor Controller is Provided for the Power
Supply
No phase advance capacitor is needed for the MxC. Installing a phase advance capacitor to the VS-656DC5
will weaken the power factor.
Model
Required Time to be Ready After Power
is Turned On
Varispeed AC (MxC)
Approx. 1.5 seconds
*
Varispeed G7/F7
Approx. 0.5 seconds
*
3