8 Instructions for UL and cUL
YASKAWA ELECTRIC
TOEP C710606 15E - AC Drive V1000 - Quick Start Guide
EN 43
Table 3 Overload Protection Settings
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.
Setting L1-01 = 1 selects a motor with limited cooling capability below rated (base) speed
when running at 100% load. The oL1 function derates the motor any time it is running below
base speed.
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.
L1-02 Motor Overload Protection Time
Setting Range: 0.1 to 5.0 Minutes
Factory Default: 1.0 Minutes
The L1-02 parameter will set the allowed operation time before the oL1 fault will occur
when the drive is running at 60 Hz and 150% of the motor’s full load amp rating (E2-01).
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.
Setting Description
0 Disabled
1 Standard fan cooled motor (default)
2 Inverter duty motor with a speed range of 1:10
3 Vector motor with a speed range of 1:100
4 Permanent Magnet Motor
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