Basic Programming 5 - 22
Motor Overload Fault
L1-01 Motor Overload Fault Selection
The Drive has an electronic overload protection function (OL1) for protecting the motor from overheating. The Drive bases the
protection on time, output current, and output frequency. The electronic thermal overload function is UL-recognized, so an
external thermal overload relay is not required for single motor operation.
This parameter selects the motor overload curve used according to the type of motor applied.
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 of its rated speed or less.
Setting L1-01 = 3 selects a motor capable of cooling itself at any speed when running at 100% load. This includes zero speed.
The OL1 function does not derate the motor at any speed.
If the Drive is connected to a single motor, the motor overload protection should be enabled (L1-01=1, 2, or 3) unless another
means of preventing motor thermal overload is provided. When the electronic thermal overload function is activated, an OL1
fault occurs, shutting OFF the Drive’s output thus preventing additional overheating of the motor. The motor temperature is
continually calculated as long as the Drive is powered up.
When operating several motors with one Drive, install a thermal relay on each motor and disable the motor overload protection
(L1-01=0).
Setting Description
0Disabled
1 Standard Fan Cooled Motor (<10:1 motor) (
factory default)
2 Standard Blower Cooled Motor (≥10:1 motor)
3 Vector Motor (
≤1000:1 motor)
Email: Sales@aotewell.com
To Next Page
Loading...
Need help?
General