10 Attachment
YASKAWA TOMPC71061753A YASKAWA AC Drive GA500 Installation and Operation Instruction 277
Figure 10.6 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.
This example shows a general-purpose motor operating at the base frequency with L1-02 set to
1.0 min.
• Cold start
Shows the motor protection operation time characteristics when the overload occurs
immediately after starting operation from a complete stop.
• Hot start
Shows the motor protection operation time characteristics when overload occurs from
continuous operation below the motor rated current.
Figure 10.6 Protection Operation Time for a General-purpose Motor at Rated Output
Frequency
L1-03: Motor Thermistor oH Alarm Select
No.
(Hex.)
Name Description
Default
(Range)
L1-03
(0482)
Motor Thermistor
oH Alarm Select
Sets drive operation when the PTC input signal entered into the
drive is at the oH3 [Motor Overheat Alarm] detection level.
3
(0 - 3)
0 : Ramp to Stop
The drive ramps the motor to stop in the deceleration time. The output terminal set for Fault
[H2-01 to H2-03 = E] activates.
1 : Coast to Stop
The output turns off and the motor coasts to stop. The output terminal set for Fault [H2-01 to
H2-03 = E] activates.
2 : Fast Stop
The drive stops the motor in the deceleration time set in C1-09 [Fast Stop Time]. The output
terminal set for Fault [H2-01 to H2-03 = E] activates.
3 : Alarm Only
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