Yaskawa J1000 Compact Vector Control Drive - Manual (Page 232)

If Auto-Tuning has been performed successfully, the motor data that was entered in T1-04 is
automatically written into parameter E2-01. If Auto-Tuning has not been performed, manually
enter the correct motor rated current in parameter E2-01.
n L1-01: Motor Overload Protection Selection
The drive has an electronic overload protection function (oL1) based on time, output current
and output frequency, which protects the motor from overheating. The electronic thermal
overload function is UL-recognized, so it does not require an external thermal overload relay
for single motor operation.
This parameter selects the motor overload curve used according to the type of motor applied.
Table C.12 Overload Protection Settings
Setting Description
0 Disabled
1 Standard Fan-Cooled Motor (Default)
2 Drive Duty Motor with a Speed Range of 1:10
3 Vector Motor with a Speed Range of 1:100
4 Permanent Magnet Motor with Variable Torque
6 Standard Fan-Cooled Motor (50 Hz)
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.
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.
C.2 UL and CSA Standards
232 YASKAWA ELECTRIC TOEP C710606 47C YASKAWA AC Drive – V1000 Quick Start Guide