YASKAWA CIPR-GA50UВ001AJ Series Installation & Primary Operation page 217

Load Tolerance
5 : PM Constant Torque
Use this setting with a PM motor for constant torque that has a speed range for constant
torque of 1:500.
The speed control for this motor is 0.2% to 100% when at 100% load. Operating slower
than 0.2% speed at 100% load will cause motor overload.
Load Tolerance
6 : Variable Torque (50Hz)
Use this setting for general-purpose motors with a 50 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.
YASKAWA TOEPC7106170YB YASKAWA AC Drive GA500 Installation & Primary Operation
Cooling Capability
This motor is designed to withstand
increased temperatures during
continuous operation at rated speed
and rated torque.
Cooling Capability
This motor is designed to withstand
increased temperatures during
continuous operation in the low
speed range (0.2% base frequency).
17 UL Standards
Overload Characteristics
(at 100% motor load)
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.
Overload Characteristics
(at 100% motor load)
The motor operates continuously at
0.2% to 100% rated speed.
Operating slower than 0.2% speed at
100% load will cause motor
overload.
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