Yaskawa AC Drive Z1000 - Manual (Page 17)

u General Application Precautions
n Selection
Installing a Reactor
Use an AC reactor in the following situations:
• to suppress harmonic current.
• when the drive is running from a power supply system with thyristor converters.
Drive Capacity
For specialized motors, make sure that the motor rated current is less than the rated output current for the drive.
When running more than one motor in parallel from a single drive, the capacity of the drive should be larger than [total motor
rated current × 1.1].
Starting Torque
The overload rating for the drive determines the starting and accelerating characteristics of the motor. Expect lower torque
than when running from line power. To get more starting torque, use a larger drive or increase both the motor and drive capacity.
Emergency Stop
During a drive fault condition, the output shuts off but the motor does not stop immediately. A mechanical brake may be
required when it is necessary to stop the motor faster than the ability of the Fast Stop function of the drive.
Options
NOTICE: The -M, +M, -, +1, and +3 terminals are used to connect optional Z1000-compatible devices only. Connecting non-Yaskawa-
approved devices to these terminals may damage the drive.
n Installation
Enclosure Panels
Keep the drive in a clean environment by installing the drive in an enclosure panel. Be sure to leave the required space between
drives to provide for cooling, and take proper measures so the ambient temperature remains within allowable limits and keep
flammable materials away from the drive. Yaskawa offers protective designs for drives 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 drive upright as specified in the manual. Refer to Mechanical Installation on page 42 for more information on
installation. Failure to comply may damage the drive due to improper cooling.
n Settings
Upper Limits
NOTICE: The drive is capable of running the motor up to 240 Hz. Be sure to set the upper limit for the frequency of the drive to prevent the
possible danger of accidentally operating equipment at higher than rated speed. The default setting for the maximum output frequency is
60 Hz.
DC Injection Braking
NOTICE: Excessive current during DC Injection Braking and excessive duration of DC Injection Braking can cause motor overheat.
Acceleration/Deceleration Times
Acceleration and deceleration times are affected by the amount of torque generated by the motor, the load torque, and the
inertia moment. Set a longer accel/decel time when Stall Prevention is enabled. The accel/decel times are lengthened for as
long as the Stall Prevention function is in operation. Install one of the available braking options or increase the capacity of the
drive for faster acceleration and deceleration.
n General Handling
Wiring Check
NOTICE: Do not connect power supply lines to output terminals U/T1, V/T2, or W/T3. Failure to comply will destroy the drive. Be sure to
perform a final check of all sequence wiring and other connections before turning on the power and also check for short circuits on the
control terminals, which may damage the drive.
Selecting a Circuit Breaker or Circuit Interrupter
Yaskawa recommends installing a Ground Fault Circuit Interrupter (GFCI) to the power supply side. The GFCI should be
designed for use with AC drives (e.g., Type B according to IEC/EN 60755).
i.2 General Safety
YASKAWA ELECTRIC TOEP C710616 45E YASKAWA AC Drive – Z1000 User Manual 17