YASKAWA V1000 Technical Manual page 449

Setting L1-01 = 2 selects a motor capable of cooling itself over a 10:1 speed range when running at 100% load. The oL1
function derates the motor when it is running at 1/10 or less of its rated speed.
Setting L1-01 = 3 selects a motor capable of cooling itself at any speed — including zero speed — when running at 100%
load. The oL1 function does not derate the motor at any speed.
Setting L1-01 = 4 selects protection for a PM motor with variable torque.
n L1-02: Motor Overload Protection Time
Setting Range: 0.1 to 5.0 Minutes
Factory Default: 1.0 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.
Operation time (minutes)
YASKAWA ELECTRIC SIEP C710606 16C YASKAWA AC Drive – V1000 Technical Manual
10
7
3
1
0.4
0.1
0 100
Figure D.9 Motor Overload Protection Time
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
D.3 UL Standards
D
449