11 UL Standards
YASKAWA Europe TOEP C710616 92D AC Drive L1000H Quick Start Guide EN 51
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) 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.
L1-03 Motor Overload Alarm Operation Selection
L1-04 Motor Overload Fault Operation Selection
2
Drive duty motor with a speed range of
1:10
Selects protection characteristics for a motor with self-cooling capability within a speed
range of 10:1. The motor overload detection level (oL1) is automatically reduced when
running below 1/10 of the motor rated speed.
3 Vector motor with a speed range of 1:100
Selects protection characteristics for a motor capable of cooling itself at any speed —
including zero speed (externally cooled motor). The motor overload detection level (oL1) is
constant over the entire speed range.
Setting Description
0
Ramp to Stop
1
Coast to Stop
2
Fast-Stop
3
Alarm Only (default setting)
Setting Description
0
Ramp to Stop
1
Coast to Stop (default setting)
2
Fast-Stop
Setting Description
Operation time (minutes)
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 (%)
E2-01 = 100% motor current
10
7
3
1
0.4
0.1
0 100 150 200
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