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Drive Motor Overload Protection
Set parameter E2-01 (motor rated current) to the appropriate value to enable motor overload
protection. The internal motor overload protection is UL listed and in accordance with the
NEC and CEC.
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E2-01: Motor Rated Current
Setting Range: Model Dependent
Default Setting: Model Dependent
Parameter E2-01 (motor rated current) protects the motor if parameter L1-01 is not set to 0
(default is 1, standard induction motor protection enabled).
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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, 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.13 Overload Protection Settings
Setting Description
0 Disabled
1 General Purpose Motor (Standard Fan-Cooled) (default)
2 Drive Dedicated Motor with a Speed Range of 1:10
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 or 2) 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 when 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.
C.3 UL Standards
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YASKAWA ELECTRIC TOEP C710606 25D YASKAWA AC Drive J1000 Installation & Start-Up Manual
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