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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
L1-03: Motor Thermistor oH Alarm Select
No.
Name
(Hex.)
L1-03
Motor Thermistor
oH Alarm Select
(0482)
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
YASKAWA TOMPC71061753A YASKAWA AC Drive GA500 Installation and Operation Instruction
Frequency
V/f
OLV
OLV/PM AOLV/PM EZOLV
OLV/PM
Sets drive operation when the PTC input signal entered into the
drive is at the oH3 [Motor Overheat Alarm] detection level.
Description
10 Attachment
Default
(Range)
3
(0 - 3)
277
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