D.3 UL Standards
446 YASKAWA TM.V1000.01 V1000 Drive Installation & Start-Up Manual (Preliminary 01-19-07)
◆ 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.
■ E2-01 Motor Rated Current
Setting Range: Model Dependent
Factory Default: 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).
If Auto-Tuning has been performed successfully, the motor data that was entered in
T1-04 is automatically written into parameter E2-01. If Auto-Tuning has not been
performed, manually enter the correct motor rated current in parameter E2-01.
■ 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 D.4 Overload Protection Settings
Setting Description
0 Disabled
1 Std Fan Cooled (< 10:1 motor) (factory default)
2 Standard Blower Cooled (10:1 motor)
3 Vector Motor (1000:1 motor)
4 PM motor
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