YASKAWA D1000 Series Instruction Manual page 17

Example:
Draw-out direction: Regeneration
<2> Use the efficiencies of the motors and drives when known. When they are not known, use a motor efficiency of 0.9 (0.85 for 7.5 kW or
less) and a drive efficiency of 0.95 (0.9 for 7.5 kW or less).
Note: When the interphase voltage imbalance ratio of the power source exceeds 2%, use a converter with a frame one size larger than is
otherwise necessary.
Calculate the interphase voltage imbalance ratio of the power source using the following formula: (Conforms to IEC/EN61800-3
(5.2.3).)
Interphase imbalance ratio （%） =
Selecting the Power Supply Capacity
Connect a power supply with a capacity (kVA) that is larger than the rated input capacity (kW) of the converter.
Connecting a power supply with a capacity smaller than the rated input capacity may trigger an operating fault. If it is
necessary to connect a power supply with a capacity smaller than the rated input capacity, consult your Yaskawa
representative or the nearest Yaskawa sales office.
Power supply capacity ≥
Installing an Input-side AC Reactor and Harmonic Filter Module
Each converter requires a corresponding input-side AC reactor and harmonic filter module that consider the saturation
current and thermal factors. Always install the specified devices.
Regenerative Converter Power Losses and Harmonic Filter Installation
Sequence the power supply for the converter so the circuit opens after the operation is stopped.
Install the specified harmonic filter (harmonic filter module) to reduce the impact of voltage surges on other devices when
the circuit opens for any unexpected reason during operation. Refer to
detailed information on the harmonic filter (harmonic filter module).
YASKAWA ELECTRIC TOEP C710656 07A YASKAWA Power Regenerative Converter - D1000 Instruction Manual
Winding direction: Drive
Maximum voltage − Minimum voltage
Three-phase average voltage
× Input power supply rated voltage
3
D1000
D1000
×
67
× Rated AC input current ÷ 1000
Harmonic Filter Module Wiring on page 65
i.2 General Safety
D1000
for
17