4.3 UL Standards220 YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual1 : Variable TorqueUse this setting for general-purpose motors with a base frequency of 60 Hz.The motor has less cooling capability in the low speed range because the cooling fan slows down and there islower overload tolerance as the speed drops. The trigger point for the electronic thermal protector changesaccording to the overload tolerance characteristics of the motor. This provides motor overheat protection from lowspeed to high speed across the entire speed range.Load tolerance Cooling Ability Overload Characteristics (at 100%motor load)Motor designed to operate from line power.The motor has maximum cooling capabilitywhen operating at a 60 Hz base frequency.The drive detects oL1 when operating atfrequencies lower than 60 Hz. The drivetriggers a fault relay output and the motorcoasts to stop.2 : Constant Torque 10:1 Speed RangeUse this setting for drive dedicated motors with a speed range for constant torque of 1:10.The speed control for this motor is 10% to 100% when at 100% load. Operating slower than 10% speed at 100%load will trigger motor overload.Load tolerance Cooling Ability Overload Characteristics (at 100%motor load)This motor is designed to withstandincreasing temperature during continuousoperation even in the low speed range (10%base frequency).The motor operates continuously at 10% to100% base frequency.3 : Constant Torque 100:1 SpeedRangeUse this setting for vector motors with a speed range for constant torque of 1:100.The speed control for this motor is 1 % to 100% when at 100% load. Operating slower than 1% speed at 100%load will trigger motor overload.Load tolerance Cooling Ability Overload Characteristics (at 100%motor load)This motor is designed to withstandincreasing temperature during continuousoperation even in the low speed range (1%base frequency).The motor operates continuously at 1% to100% base frequency. Motor overload istriggered when operating slower than 1%speed at 100% load.
