Table 4.7 Motor Type and Overload Tolerances
L1-01
Setting
Motor Type Overload Tolerance Cooling Fan Capacity
Electrothermal
Protection (100%
motor overload)
1
General-
purpose motor
(standard
motor)
Rated Speed=100% Speed
Continuous
150
100
90
60
50
05
33
100 120 167 200
(60 Hz)
Speed (%)
B
C
A
60 Sec.
Torque (%)
General purpose motors are
designed to operate from line
power. The most effective
cooling occurs when running
at line power specifications.
Operating continuously at
less than line power
frequency can trigger
motor overload protection
(oL1). A fault is then
output and the motor will
coast to stop.
2
Inverter Duty
motor (1:10)
100
150
Rated Speed=100% Speed
60 sec.
Continuous
A
D
B
1
10
100120
167 200
(60 Hz)
Speed (%)
Torque (%)
55
50
0
Motor designed to effectively
self-cool at speeds as low as
6 Hz.
Continuous operation
between 6 and 50/60 Hz.
Notes on Motor Protection
• Motor protection meeting UL and cUL standards is achieved with the motor overload
protection time (L1-02) set to factory default setting. Normally, L1-02 (Motor Overload
Protection Time) does not require setting. If the motor overload tolerance is clear, set the
overload protection time at hot start according to the motor. To detect overload earlier,
decrease the setting.
Figure 4.19 illustrates motor protection operation time characteristics.
10
7
3
1
0.4
0.1
0 100 200150
Cold Start
Hot Start
Motor Current (%)
E2-01 = 100%
Operation Time (minutes)
Figure 4.19 Motor Protection Operation
4.5 Basic Operation
YASKAWA ELECTRIC TOEP C710606 25B YASKAWA AC Drive J1000 Installation & Start-Up Manual
107
4
Start-Up Programming
& Operation
2/6/2008-14:44
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