YASKAWA L1000A Quick Start Manual page 61

Enable the motor overload protection (L1-01 = 1 to 3, 5) 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 while the drive is powered up.

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 60 Hz and at 150% of the full load amp rating (E2-01/E5-03) 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.
Operation time (minutes)
10
7
3
1
0.4
0.1

L1-03 Motor Overload Alarm Operation Selection
Setting
0 Ramp to Stop
1 Coast to Stop
2 Fast-Stop
3 Alarm Only (default setting)

L1-04 Motor Overload Fault Operation Selection
Setting
0 Ramp to Stop
1 Coast to Stop (default setting)
2 Fast-Stop
YASKAWA ELECTRIC TOEP C710616 33G AC Drive L1000A - Quick Start Guide
0 100
Cold start
(Characteristics when an overload occurs
at a complete stop)
Hot start
(Characteristics when an overload occurs
during continuous operation at 100%)
Motor current (%)
150 200
E2-01 = 100% motor current
Description
Description
11 UL Standards
EN 61