Enable the motor overload protection (L1-01 = “1”, “2”, or “3”) when connecting the drive
to a single motor unless there is another means of preventing motor thermal overload. The
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 20.0 Minutes
Factory Default: 8.0 Minutes
The L1-02 parameter sets the allowed operation time before the oL1 fault occurs when the
drive is running at 60 Hz and 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.
10
7
3
1
0.4
0.1
0
100
200
150
Cold Start
Hot Start
Motor Current (%)
(E2-01=100 %)
Time (min)
Figure C.7 Motor Overload Protection Time
C.2 UL and CSA Standards
220
YASKAWA ELECTRIC TOEP C710606 47A YASKAWA AC Drive – V1000 Quick Start Guide
