YASKAWA A1000 Technical Manual page 22

i.2 General Safety

Installation
Enclosure Panels
Keep the drive in a clean environment by either selecting an area free of airborne dust, lint, and oil mist, or install the
drive in an enclosure panel. Be sure to leave the required space between drives to provide for cooling, and that proper
measures are taken so that the ambient temperature remains within allowable limits. Keep flammable materials away
from the drive. If the drive must be used in an area where it is subjected to oil mist and excessive vibration, protective
designs are available. Contact YASKAWA or your YASKAWA agent for details.
Installation Direction
The drive should be installed upright as specified in the manual. For more information on installation,
Mechanical Installation on page

Settings
Upper Limits
The drive is capable of running the motor up to 400 Hz. Due to the danger of accidentally of operating at high speed, be
sure to set the upper limit for the frequency. The default setting for the maximum output frequency is 50 Hz.
DC Injection Braking
Motor overheat can result if there is too much current used during DC Injection Braking, or if the time for DC Injection
Braking is too long.
Acceleration/Deceleration Times
Acceleration and deceleration times are affected by how much torque the motor generates, 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 operating. For faster acceleration and deceleration, install one of the braking options
available or increase the capacity of the drive.

General Handling
Wiring Check
Never connect the power supply lines to output terminals U/T1, V/T2, or W/T3. Doing so will destroy the drive. Be sure
to perform a final check of all sequence wiring and other connections before turning the power on. Make sure there are
no short circuits on the control terminals (+V, AC, etc.), as this could damage the drive.
Selecting a Circuit Breaker or Leakage Circuit Breaker
YASKAWA recommends installing equipment for residual current monitoring/detection (RCM/RCD) to the power
supply side. The RCM/RCD should be designed for use with an AC drive (e.g. Type B according to IEC/EN 60755).
Select a MCCB (Molded Case Circuit Breaker) or RCM/RCD with a rated current that is 1.5 to 2 times higher than the
rated current of the drive in order to avoid nuisance trips caused by harmonics in the drive input current. Also refer to
Installing a Molded Case Circuit Breaker (MCCB) and Equipment for Residual Current Monitoring/Detection
(RCM/RCD) on page 430.
NOTICE: Prevent Equipment Damage. For models CIMR-A4A0930 and 4A1200, make sure to install a fuse and equipment for
residual current monitoring/detection (RCM/RCD). Failure to comply may result in serious damage to the facilities in case the drive is
defected. Refer to Wiring Fuses for the
Magnetic Contactor Installation
Use a magnetic contactor (MC) to ensure that power to the drive can be completely shut off when necessary. The MC
should be wired so that it opens when a fault output terminal is triggered.
Avoid switching a MC on the power supply side more frequently than once every 30 minutes. Frequent switching can
cause damage to the drive.
Inspection and Maintenance
Capacitors in the drive take time to discharge even after the power has been shut off. After shutting off the power, wait
for at least the amount of time specified on the drive before touching any components.
The heatsink can become quite hot during operation, and proper precautions should be taken to prevent burns. When
replacing the cooling fan, shut off the power and wait at least 15 minutes to be sure that the heatsink has cooled down.
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CIMR-A
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
Refer to
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