YASKAWA CIMR-DC4A0040AAA Technical Manual page 16

i.2 General Safety
<1> Motoring capacity is the electrical power capacity needed to support the ordinary operational status when supplying power to the motor.
The regenerative capacity is the capacity that is generated when the flow of power is reversed, such as when the drive is decelerated.
<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
EN 61800-3:2004/A1:2012 (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.
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
page 62 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.
Installation
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Enclosure Panels
Keep the converter in a clean environment by installing the converter in an enclosure panel or selecting an installation
area free of airborne dust, lint, and oil mist. Be sure to leave the required space between converters to provide for
cooling, and take proper measures so the ambient temperature remains within allowable limits and keep flammable
materials away from the converter. Yaskawa offers protective designs for converters that must be used in areas subjected
to oil mist and excessive vibration. Contact Yaskawa or your Yaskawa agent for details.
Installation Direction
NOTICE: Install the converter upright as specified in the manual. Refer to
on installation. Failure to comply may damage the converter due to improper cooling
Interlock
An interlock is required between the converter and drive to stop the drive if the converter fails or if a fault occurs in the
converter. It is also necessary to provide a suitable time to restart the drive if it will be restarted for momentary power
losses.
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Example:
Draw-out direction: Regeneration
Interphase imbalance ratio (%) =
× Input power supply rated voltage
3
YASKAWA ELECTRIC SIEP C710656 06F YASKAWA Power Regenerative Converter - D1000 Technical Manual
Winding direction: Drive
Maximum voltage − Minimum voltage
Three-phase average voltage
× Rated AC input current ÷ 1000
Harmonic Filter Module Wiring on
Mechanical Installation on page 27
×
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for more information