Yaskawa F7 Drive User Manual Bedienungsanleitung PDF herunterladen (Seite 123)

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)

1 2 ... 118 119 120 121 122 123 124 125 126 127 128 ... 254 255

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Yaskawa F7 Drive User Manual Bedienungsanleitung Seite 123