LiteOn EVO 6800 Series, Manual

Page: 167 / 261

167
The motor is self-cooled so the overload tolerance falls when the motor speed is decreased.
The Electrothermal relay trigger level changes according to the motor overload characteristics
to protect the motor from overheat throughout the entire speed range.
Overload Tolerance Cooling Ability
Overlaod Characteristics
(when motor load is 100%)
150
100
90
60
50
Torque
(%)
0 5
33 100
Speed(%)
(60Hz)
60 seconds
Continuous
Rated speed=100% speed
Motor to operate from
line power.
Motor cooling is most
effective when
running at 50/60 Hz
Running continuously at below
50/60 Hz triggers an oL1 fault.
A fault is output and the motor
will coast to stop.
2 : Drive Dedicated Motor (Constant Torque Range 1 : 10)
The motor is allowed to run with 100% load from 10% to 100% speed. When the motor runs
slower with 100% load, an overload fault will be triggered.
Overload Tolerance Cooling Ability
Overlaod Characteristics
(when motor load is 100%)
150
100
90
55
50
Torque
(%)
0 110 100 Speed (%)
(60Hz)
60 seconds
Continuous
Rated speed=100%
speed
Motor cools itself
effectively even at low
speeds (about 6 Hz)
Continuous run from 6 Hz to
60 Hz
3 : Vector Motor (Constant Torque Range 1 : 100)
The motor is allowed to run with 100% load from 1% to 100% speed. When the motor runs
slower with 100% load, an overload fault will be triggered.
Overload Tolerance Cooling Ability Overlaod Characteristics