L1-02: Motor Overload Protection Time - YASKAWA HV600 Series Installation & Primary Operation

NOTICE
When you connect more than one motor to one drive or when the motor amp rating is higher than the drive amp
rating, set L1-01 =0 [Motor Overload (oL1) Protection = Disabled] and install thermal overload relays for each motor. The electronic
thermal protection of the drive will not function and it can cause damage to the motor.
1 : Variable Torque
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.
The overload tolerance characteristics of the motor change the trigger point for the electronic thermal protector. This
provides motor overheat protection from low speed to high speed across the full speed range.
Load Tolerance
4 : PM Variable Torque
Use this setting for PM motors with derated torque characteristics.
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.
The overload tolerance characteristics of the motor change the trigger point for the electronic thermal protector. This
provides motor overheat protection from low speed to high speed across the full speed range.
Load Tolerance
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L1-02: Motor Overload Protection Time

No.
Name
(Hex.)
L1-02 Motor Overload Protection
Time
(0481)
Set the overload tolerance time to the length of time that the motor can operate at 150% load from continuous
operation at 100% load.
When the motor operates at 150% load continuously for 1 minute after continuous operation at 100% load (hot start),
the default setting triggers the electronic thermal protector.
Figure 12.3 shows an example of the electronic thermal protector operation time. Motor overload protection operates
in the range between a cold start and a hot start.
YASKAWA TOEPC71061732E HV600 Drive Installation & Primary Operation
Cooling Capability
This motor is designed to operate with commercial line
power. Operate at a 60 Hz base frequency to maximize the
motor cooling ability.
Cooling Capability
This motor is designed to withstand increased temperatures
during continuous operation at rated speed and rated torque.
V/f OLV/PM EZOLV OLV/PM
Sets the operation time for the electronic thermal protector of the drive to prevent damage to the
motor. Usually it is not necessary to change this setting.
If the motor operates at frequencies less than 60 Hz, the
drive will detect oL1. The drive triggers a fault relay output
and the motor coasts to stop.
If the motor operates continuously at lower speed than rated
rotation speed at more than 100% torque, the drive will
detect oL1. The drive triggers a fault relay output and the
motor coasts to stop.
Description
12 UL Standards
Overload Characteristics
(at 100% motor load)
Overload Characteristics
(at 100% motor load)
Default
(Range)
1.0 min
(0.1 - 5.0 min)
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