YASKAWA V1000 Quick Start Manual page 155

Disable the electronic overload protection (L1-01 = 0: Disabled) and wire each motor with
its own motor thermal overload when connecting the drive to more than one motor for
simultaneous operation.
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.
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 133% 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 8.6
A – Time (minutes)
YASKAWA ELECTRIC TOEP C710606 14A YASKAWA AC Drive - V1000 Quick Start Guide
10H z 60H z
10
8
1
6
4
2
E 2-01 125%
Figure 8.6 Motor Overload Protection Time
8.2 UL Standards
150% 175% 200%
2
B – Output Current
(Percent of motor FLA)
8
155