Yaskawa CIMR-PU2A0415 [521/548] L1 01 motor overload protection selection

Yaskawa CIMR-PU2A0360 [521/548] L1 01 motor overload protection selection
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L1-01: Motor Overload Protection Selection
The
drive has an electronic overload protection
function (oL1) based on time, output current, and output frequency that protects
the motor from overheating. The electronic thermal overload function is UL-recognized, so it does not require an external
thermal relay for single motor operation.
This parameter selects the motor overload curve used according to the type of motor applied.
Table D.10 Overload Protection Settings
Setting Description
0 Disabled Disabled the internal motor overload protection of the drive.
1 Standard fan-cooled motor (default)
Selects protection characteristics for a standard self-cooled motor with limited cooling capabilities
when running below the rated speed. The motor overload detection level (oL1) is automatically
reduced when running below the motor rated speed.
2 Drive duty motor with a speed range of 1:10
Selects protection characteristics for a motor with self-cooling capability within a speed range of
10:1. The motor overload detection level (oL1) is automatically reduced when running below
1/10 of the motor rated speed.
3 Vector motor with a speed range of 1:100
Selects protection characteristics for a motor capable of cooling itself at any speed including zero
speed (externally cooled motor). The motor overload detection level (oL1) is constant over the
entire speed range.
6 Standard fan-cooled motor (50 Hz)
Selects protection characteristics for a standard self-cooled motor with limited cooling capabilities
when running below the rated speed. The motor overload detection level (oL1) is automatically
reduced when running below the motor rated speed.
When connecting the drive to more than one motor for simultaneous operation, disable the electronic overload protection
(L1-01 = 0) and wire each motor with its own motor thermal overload relay.
Enable motor overload protection (L1-01 0) when connecting the drive to a single motor, unless another motor overload
preventing device is installed. The drive 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 while the drive
is powered up.
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L1-02: Motor Overload Protection Time
Setting Range: 0.1 to 5.0 min
Factory Default: 1.0 min
Parameter L1-02 determines how long the motor is allowed to operate before the oL1 fault occurs when the drive is running
at 60 Hz and at 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.
10
7
3
1
0.4
0.1
0 100 200150
Cold Start
Hot Start
Motor Current (%)
(E2-01=100 %)
Time (min)
Figure D.8 Motor Overload Protection Time
D.3 UL and CSA Standards
YASKAWA SIEP YAIP1U 01A AC Drive - P1000 Technical Manual
521
D
Standards Compliance

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