YASKAWA
TOMPC71061753A YASKAWA AC Drive GA500 Installation and Operation Instruction
277
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
V/f
OLV
OLV/PM
OLV/PM AOLV/PM
EZOLV
