4.3 UL Standards222 YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual■L1-02: Motor Overload Protection TimeNo.(Hex.) Name Description Default Setting(Range)L1-02(0481)Motor Overload(oL1) Protection Sets the operation time for the electronic thermal protector of the drive toprotect the motor. Normally there is no need to change this setting.1.0 min(0.1 - 5.0 min)Set the overload tolerance time to the length of time that the motor is allowed to operate at 150% load fromcontinuous operation at 100% load.The default setting triggers the electronic thermal protector after the motor operates at 150% load continuously for1 minute after continuous operation at 100% load (hot start).The following diagram is an example of the electronic thermal protector operation time. Motor overloadprotection 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 startShows the motor protection operation time characteristics when the overload occurs immediately after startingoperation from a complete stop.• Hot startShows the motor protection operation time characteristics when overload occurs from continuous operationbelow the motor rated current.Figure 4.16 Protection Operation Time for a General-purpose Motor at Rated Output Frequency■L1-03: Motor OH Alarm Operation SelectNo.(Hex.) Name Description Default Setting(Range)L1-03(0482)Motor OH AlarmOperation Select Selects the drive operation when the PTC input signal input into the drivereaches the detection level of oH3 [Motor Overheat Alarm].3(0 - 3)0 : Ramp to stopThe drive ramps the motor to stop according to the deceleration time. Fault relay output terminal MA-MC willturn on, and MB-MC will turn off.1 : Coast to stopThe drive shuts off output and the motor coasts to stop. Fault relay output terminal MA-MC will turn on, and MB-MC will turn off.2 : Fast StopThe drive stops the motor using the deceleration time set in C1-09 [Fast Stop Time]. Fault relay output terminalMA-MC will turn on, and MB-MC will turn off.3 : Alarm onlyoH3 appears on the keypad, and operation continues.V/f CL-V/f OLV CLV AOLV OLV/PMOLV/PM AOLV/PM CLV/PM EZOLVV/f CL-V/f OLV CLV AOLV OLV/PMOLV/PM AOLV/PM CLV/PM EZOLV
