5.3 UL Standards
202 SIEPYEUOQ2A01A AC Drive Q2A Technical Manual
■ E9-06 Motor Rated Current
No.
(Hex.)
Name Description
Default
(Range)
E9-06
(11E9)
Motor Rated Current
Sets the motor rated current in amps.
Determined by E9-01 and
o2-04
(10% to 200% of the drive
rated current)
Note:
When the drive model changes, the display units for this parameter also change.
• 0.01 A: 4002 to 4023
• 0.1 A: 4031 to 4675
The setting value of E9-06 is the reference value for motor protection. Enter the motor rated current shown on the
motor nameplate. Auto-Tuning the drive will automatically set E9-06 to the value input for “Motor Rated
Current”.
■ L1-01 Motor Cool Type for OL1 Calc
No.
(Hex.)
Name Description
Default
(Range)
L1-01
(0480)
Motor Cool Type for OL1
Calc
Sets the motor overload protection with electronic thermal protectors.
Determined by A1-02
(0 - 6)
This parameter enables and disables the motor overload protection with electronic thermal protectors.
The cooling capability of the motor changes when the speed control range of the motor changes. Use an electronic
thermal protector that aligns with the permitted load characteristics of the motor to select motor protection.
The electronic thermal protector of the drive uses these items to calculate motor overload tolerance and supply
overload protection for the motor:
• Output current
• Output frequency
• Motor thermal characteristics
• Time characteristics
If the drive detects motor overload, the drive will trigger an oL1 [Motor Overload] and stop the drive output.
Set H2-01 = 4E [2NO-2CM Func Selection = Drive PreOH] to set a motor overload alarm. If the motor overload
level is more than 90% of the oL1 detection level, the output terminal turns ON and triggers an overload alarm.
1 : VTorque
Disable motor protection when motor overload protection is not necessary or when the drive is operating more
than one motor.
Figure 5.22 Example: Protection Circuit Configuration to Connect More than One Motor to One Drive
NOTICE: When one drive is operating more than one motor at the same time or when the rated current of the motor is much
larger than rated current of a standard motor, you cannot protect the motor with electronic thermal protection. To protect each
motor, set L1-01 =1 [Motor Cool Type for OL1 Calc = VTorque], configure the circuits, then add thermal relays to each motor.
The magnetic contactor installed for motor protection cannot be switched ON/OFF during run. Failure to obey can cause motor
failure.
2 : CT 10:1 Speed Range
Use this setting for general-purpose motors with a 60 Hz base frequency.
The overload tolerance decreases as motor speed decreases because the cooling fan speed decreases and the ability
of the motor to cool decreases in the low speed range.
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