Omron Q2A Series Technical Manual page 741

Load Tolerance
■
L1-02 OL1 Protect Time
No.
Name
(Hex.)
L1-02 OL1 Protect Time
(0481)
Set the overload tolerance time to the length of time that the motor can operate at 150% load from continuous
operation at 100% load.
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 12.119 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.
Name
(Hex.)
L1-03 Motor oH AL Reaction
Select
(0482)
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.
SIEPYEUOQ2A01A AC Drive Q2A Technical Manual
Cooling Capability
This motor is designed to operate with commercial line
power. Operate at a 50 Hz base frequency to maximize
the motor cooling ability.
V/f CL-V/f OLV CLV AOLV
Sets the operation time for the electronic thermal protector of the drive to prevent damage to the
motor. Usually it is not necessary to change this setting.
V/f CL-V/f OLV CLV AOLV
Sets drive operation when the PTC input signal entered into the drive is at the oH3 [Motor
Overheat Alarm] detection level.
If the motor operates at frequencies less than commercial
line power, the drive will detect oL1. The drive triggers a
fault relay output and the motor coasts to stop.
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
12.8 L: PROTECTION
Overload Characteristics
(at 100% motor load)
Default
(Range)
1.0 min
(0.1 - 5.0 min)
Default
(Range)
3
(0 - 3)
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