Yaskawa Varispeed-656 DC5 - Manual (Page 69)

Appendix B PRECAUTIONS ON VS-656DC5 APPLICATION
E-59
„ Power Supply Capacity Selection
Use a power supply with a capacity larger than the VS-656DC5 rated input capacity. If a
power supply with a capacity smaller than the VS-656DC5 rated input capacity is used, an
operation error may occur. When selecting a power supply, contact your Yaskawa represen-
tative.
Use the following formula to obtain the VS-656DC5 rated input capacity.
„ Interlocking with Inverters
It is necessary to interlock between the VS-656DC5 and the Inverter to stop the Inverter by
using the VS-656DC5 fault signal. To restart the operation after a memontary power loss at
the Inverter side, the timing for reactivation must be assured.
The “MC Operating (MCON)” signal that the VS-656DC5 outputs from the control terminal
is used to assure the timing. When the “MC Operating (MCON)” signal is “open,” use the
Inverter external baseblock input to make a sequence to shut OFF the Inverter output.
[Typical Interlock]
• When reactivation after momentary power loss is not performed (Coasting to a stop by
momentary power loss detection)
Insert the VS-656DC5 “MC Operating (MCON)” output to the Inverter “External Fault”
input.
The Inverter “External Fault” input is NC contact input. To prevent external fault oper-
ation at power supply ON, select “External fault accepted only during RUN.”
• When reactivation after momentary power loss is performed as system
Insert the VS-656DC5 “MC Operating (MCON)” output to the Inverter “External BB”
input.
Select reactivation after momentary power loss at the Inverter side. Then select the
coasting lead-in mode or speed search mode.
Select NC contact input for the Inverter “External BB” input.
„ Precautions on Application of Peripheral Devices
When a noise filter is attached on the VS-656DC5 power supply side, use a noise filter of the
reactor type (without a capacitor) such as finemet zero-phase reactor, and attach it behind the
MCCB at the power supply side. Do not use a capacitor-built-in type noise filter since the
harmonic components may overheat or damage the capacitor.
S
conv
3 × I
AC_rate
× V
in
÷ 1000
[I
AC_rate
: VS-656DC5 rated input current (A), V
in
: Power supply line voltage (V)]