Motor application precautions – Yaskawa AC Drive-P1000 Industrial Fan User Manual
Page 22
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Settings
Upper Limits
NOTICE:
The drive is capable of running the motor up to 400 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.
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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 60755).
Select a Molded Case Circuit Breaker (MCCB) or GFCI with a rated current 1.5 to 2 times higher than the drive rated current
to avoid nuisance trips caused by harmonics in the drive input current.
Refer to Installing a Molded Case Circuit Breaker
(MCCB) or Ground Fault Circuit Interrupter (GFCI) on page 387
for more information.
NOTICE:
Prevent Equipment Damage. Install a fuse and a GFCI in models 4A0930 and 4A1200. Failure to comply may result in serious
damage to the facilities if the drive is defective.
Refer to Wiring Fuses for Models 4A0930 and 4A1200 on page 83
for details.
Magnetic Contactor Installation
WARNING!
Fire Hazard. Shut off the drive with a magnetic contactor (MC) when a fault occurs in any external equipment such as braking
Refer to Installing a Magnetic Contactor at the Power Supply Side on page 387
. Failure to comply may cause resistor overheating,
fire, and injury to personnel.
NOTICE:
To get the full performance life out of the electrolytic capacitors and circuit relays, refrain from switching the drive power supply
off and on more than once every 30 minutes. Frequent use can damage the drive. Use the drive to stop and start the motor.
Inspection and Maintenance
WARNING!
Electrical Shock Hazard. Capacitors in the drive do not immediately discharge after shutting off the power. Wait for at least the
amount of time specified on the drive before touching any components after shutting off the power. Failure to comply may cause injury to
personnel from electrical shock.
WARNING!
Burn Hazard. Because the heatsink can get very hot during operation, take proper precautions 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. Failure to comply may cause
burn injury to personnel.
Wiring
Yaskawa recommends using ring terminals on all drive models. Drive models 2A0069 to 2A0415, 4A0058 to 4A1200, and
5A0041 to 5A0242 require the use of use ring terminals for UL/cUL compliance. Use only the tools recommended by the
terminal manufacturer for crimping.
Transporting the Drive
NOTICE:
Never steam clean the drive. During transport, keep the drive from coming into contact with salts, fluorine, bromine, phthalate
ester, and other such harmful chemicals.
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Motor Application Precautions
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Standard Induction Motors
Low-Speed Range
The cooling fan of a standard motor should sufficiently cool the motor at the rated speed. As the self-cooling capability of
such a motor reduces with the speed, applying full torque at low speed will possibly damage the motor. Reduce the load torque
as the motor slows to prevent motor damage from overheat.
shows the allowable load characteristics for a Yaskawa
standard motor. Use a motor designed specifically for operation with a drive when 100% continuous torque is needed at low
speeds.
i.2 General Safety
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YASKAWA SIEP YAIP1U 01B AC Drive - P1000 Technical Manual