Standards Compliance
5
5.3 UL Standards
SIEPYEUOQ2A01A AC Drive Q2A Technical Manual 205
When the motor operates at 150% load continuously for 1 minute after continuous operation at 100% load (hot
start), the default setting triggers the electronic thermal protector.
Figure 5.23 Example: Protection Operation Time for a General-purpose Motor at Rated Output Frequency
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.
■ L1-03 Motor oH AL Reaction Select
No.
(Hex.)
Name Description
Default
(Range)
L1-03
(0482)
Motor oH AL Reaction
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->Stop
The drive ramps the motor to stop in the deceleration time. Fault relay output terminal 1NO-1CM turns ON and
1NC-1CM turns OFF.
1 : Coast->Stop
The output turns OFF and the motor coasts to stop. Fault relay output terminal 1NO-1CM turns ON, and 1NC-
1CM turns OFF.
2 : Fast Stop (C1-09)
The drive stops the motor in the deceleration time set in C1-09 [Fast Stop Time]. Fault relay output terminal 1NO-
1CM turns ON, and 1NC-1CM turns OFF.
3 : Alarm Only
The keypad shows oH3, and operation continues. The output terminal set for Alarm [H2-01 to H2-03 = 4] turns
ON.
■ Motor oH FLT Reaction Select
No.
(Hex.)
Name Description
Default
(Range)
L1-04
(0483)
Motor oH FLT Reaction
Select
Sets the drive operation when the PTC input signal to the drive is at the oH4 [Motor Overheat
Fault (PTC Input)] detection level.
1
(0 - 2)
0 : Ramp->Stop
The drive ramps the motor to stop in the deceleration time. Fault relay output terminal 1NO-1CM turns ON and
1NC-1CM turns OFF.
1 : Coast->Stop
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