6 -62 Setting Motor Protection Operation TimeSet the motor protection operation time in L1-02.If, after operating the motor continuously at the rated current, a 150% overload is experienced, set the (hotstart) electronic thermal protection operation time. The factory setting is resistance to 150% for 60 seconds.The following diagram shows an example of the characteristics of the electronic thermal protection operationtime (L1-02 = 1.0 min., operation at 60 Hz, general-purpose motor characteristics, when L1-01 is set to 1)Fig 6.40 Motor Protection Operation TimeSetting Precautions• If multiple motors are connected to one Inverter, set constant L1-01 to 0 (disabled). To protect the motor,install a thermal relay in the motor power cable, and perform overload protection on each motor.• With applications where the power supply is often turned ON and OFF, there is a risk that the circuit cannot be pro-tected even if this constant has been set to 1 (enabled), because the thermal value will be reset.• To detect overloads in good time, set the set value in constant L1-02 to a low setting.• When using a general-purpose motor (standard motor), the cooling ability will be lowered by f 1/4 (fre-quency). Consequently, the frequency may cause motor overload protection (OL1) to occur, even belowthe rated current. If operating using the rated current at a low frequency, use a special motor.3 Vector motor(1:100)This motor yields acooling effect evenwhen operating atextremely low speeds(approx. 0.6 Hz).Operates continuously at0.6 to 60 Hz.L1-01SetValueMotor Type Tolerance Load Characteristics Cooling AbilityElectronic ThermalOperation (at 100%Motor Load)Short time 60 s.Torque (%)Rated rotation speed= 100% speedContinuousFrame numberMax. speed of200 LJ min.Frame number Max. speedof 160 MJ to 180 LJFrame number Max.speed of 132 MJRotation speed (%)Operating time (min.)Cold startHot startMotor current (%)E2-01 is set to 100%
