YASKAWA T1000A Technical Manual page 488

D.3 UL Standards
Enable the motor overload protection (L1-01 = 1 to 6) when connecting the drive to a single motor, unless another motor
overload preventing device is installed. The drive electronic thermal overload function causes an oL1 fault, which shuts
off the output of the drive and prevents additional overheating of the motor. The motor temperature is continually
calculated as long as the drive is powered up.
n
L1-02 Motor Overload Protection Time
Setting Range: 0.1 to 5.0 min
Factory Default: 1.0 min
Parameter L1-02 determines how long the motor is allowed to operate before the oL1 fault occurs when the drive is
running at 50 Hz and at 150% of the full load amp rating (E2-01) of the motor. Adjusting the value of L1-02 can shift the
set of oL1 curves up the y axis of the diagram below, but will not change the shape of the curves.
Figure D.7
488
Time (min)
10
7
3
1
0.4
0.1
0 100 150
Figure D.7 Motor Overload Protection Time
YASKAWA ELECTRIC SIEP C710616 30B YASKAWA AC Drive T1000A Technical Manual
Cold Start
Hot Start
Motor Current (%)
(E2-01=100 %)
200