Yaskawa D1000 Series Power Regenerative Converter User Manual

Page 16

i.2 General Safety

YASKAWA ELECTRIC TOEP C710656 07C YASKAWA Power Regenerative Converter - D1000 Instruction Manual

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/EN 61800-3
(5.2.3).)

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.

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

Harmonic Filter Module Wiring on page 67

for

detailed information on the harmonic filter (harmonic filter module).

Installing a Breaker or Contactor on the Converter Output (DC) Side

Take the following precautions when installing a breaker or contactor on the converter side for an emergency shutoff.

NOTICE: Damage to Equipment. Confirm that the breaker or contactor on the converter output (DC) side is closed and the CHARGE

indicators on the drive and converter are OFF before applying power to the converter. An overcurrent condition will occur and the

device may be damaged if the power supply is turned on while there is voltage present in the drive or converter.

<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).

Example:

Draw-out direction: Regeneration

Winding direction: Drive

D1000

Interphase imbalance ratio

（%） =

Maximum voltage − Minimum voltage

Three-phase average voltage

D1000

Power supply capacity ≥

Input power supply rated voltage

Rated AC input current ÷ 1000

D1000

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