YASKAWA V7 Technical Manual

Also see for SI-T/ V7: Instructions

Contents

n036 : Motor Rated Current Factory setting: See Table A3-1Range: see descriptionThis parameter should be set, in increments of 0.1 A, to the rated current (FLA) value shown on the motornameplate; this value MUST BE between 10% and 150% of the drive rated current. If the motor FLA does notfall within this range, a different Model No. drive must be used.NOTE: Setting n036 to " 0.0 " disables the motor overload protectionfunction, regardless of the setting of n037 or n038.n037 : Electronic Thermal Motor Protection Factory setting: 0Range: 0 to 2Setting Electronic Thermal Characteristics0 Short term rating1 Standard rating2 Electronic thermal overload protection disabledn038 : Electronic Thermal Overload Protection Factory setting: 8Time Constant Range: 1 to 60 min.This parameter sets the electronic thermal overload relay protection time when when 150% of overload isapplied after the motor is operated continuously at rated current.The Drive protects against motor overload with a UL-recognized, built-in electronic thermal overload relay.The electronic thermal overload function monitors motor temperature, based on drive output current and time,to protect the motor from overheating. When the electronic thermal overload trips, an“ oL1 ” error occurs, shutting OFF the drive output and preventing excessive overheating of the motor.When operating with one drive connected to only one motor, an external thermal relay is not needed. Whenoperating several motors with one drive, install a thermal overload relay on each motor.5.25 THERMAL OVERLOAD PROTECTIONElectronic ThermalCooling Effect Current Characteristics OverloadEffective whenoperated at 60Hzfrom a commercialpower supply“ oL 1 ” error (motoroverload protection)occurs whencontinuously operatedat less than 60Hz at100% load.Base Frequency60Hz(V/f for 60Hz,230V Input Voltage)0385580100TORQUE(%)1401551803 20 60 12060 SECSHORT TERMCONTINUOUSRATINGOPERATION FREQUENCY (Hz)Effective whenoperated at lowspeed (approx. 6Hz)Electronic thermaloverload protection notactivated even whencontinuously operatedat less than 60Hz at100% load.03855100TORQUE(%)1501806 60 120OPERATION FREQUENCY (Hz)60 SECSHORT TERMCONTINUOUSRATINGShort Term RatingStandard RatingBase Frequency60Hz(V/f for 60Hz,230V Input Voltage)5-38