YASKAWA OYMC V1000, Programming Manual

Page: 186 / 408

1.8 L: Protection Functions
186 YASKAWA ELECTRIC SIEP C710606 10A YASKAWA AC Drive - V1000 PRELIM. Programming Manual
NOTICE: Protect each motor with individual thermal overloads when multiple motors are connected to one
drive. Failure to comply could result in improper drive operation. Disable the electronic overload protection
of the drive (L1-01= “0: Disabled”) and protect each motor with its own motor thermal overload.
Setting 1: General Purpose Motor (standard self-cooled)
Because the motor is self-cooled, the overload tolerance drops when the motor speed is
lowered. The drive appropriately adjusts the electrothermal trigger point according to the
motor overload characteristics, protecting the motor from overheat throughout the entire
speed range.
Setting 2: Drive Dedicated Motor (constant torque, 1:10)
Use this setting when operating a drive dedicated motor with a torque ratio of 1:10. This
motor type is allowed to run with 100% load from 10% up to 100% speed. Running slower
speeds with full load can trigger an overload fault.
Overload Tolerance Overload Characteristics Cooling Ability
Motor designed to operate
from line power.
Motor cooling is most
effective when running at the
line power frequency that it
is designed for (check the
motor specifications).
Operating continuously at
less then the line power
frequency with 100% load
can trigger motor overload
protection (OL1). A fault is
then output and the motor
will coast to stop.
100
150
90
60
50
Torque
(%)
60 seconds
Continuous
0 5 33 100
㧔
60Hz
㧕
120 167 200
(%) Speed
C
B
Rated Speed = 100% Speed
A