n Drive Short Circuit RatingThe drive is suitable for use on a circuit capable of delivering not more than 100,000 RMS symmetrical Amperes, 240 Vacmaximum (200 V Class) and 480 Vac maximum (400 V Class), when protected by Bussmann Type FWH or FWP fuses asspecified in Installing Fuses on the Input Side on page 366.u Drive Motor Overload ProtectionSet parameter E2-01 (motor rated current) to the appropriate value to enable motor overload protection. The internal motoroverload protection is UL Listed and in accordance with the NEC and CEC.n E2-01: Motor Rated CurrentSetting Range: Model-dependentDefault Setting: Model-dependentParameter E2-01 protects the motor when parameter L1-01 is not set to 0. The default for L1-01 is 1, which enables protectionfor standard induction motors.If Auto-Tuning has been performed successfully, the motor data entered to T1-04 is automatically written to parameter E2-01.If Auto-Tuning has not been performed, manually enter the correct motor rated current to parameter E2-01.n L1-01: Motor Overload Protection SelectionThe drive has an electronic overload protection function (oL1) based on time, output current, and output frequency that protectsthe motor from overheating. The electronic thermal overload function is UL-recognized, so it does not require an externalthermal relay for single motor operation.This parameter selects the motor overload curve used according to the type of motor applied.Table D.6 Overload Protection SettingsSetting Description0 Disabled Disabled the internal motor overload protection of the drive.1 Standard fan-cooled motor (default) Selects protection characteristics for a standard self-cooled motor with limited cooling capabilitieswhen running below the rated speed. The motor overload detection level (oL1) is automaticallyreduced when running below the motor rated speed.4 Permanent Magnet motor with variabletorque control Selects protection characteristics for a variable torque PM motor. The motor overload detectionlevel (oL1) is automatically reduced when running below the motor rated speed.When connecting the drive to more than one motor for simultaneous operation, disable the electronic overload protection(L1-01 = 0) and wire each motor with its own motor thermal overload relay.Enable motor overload protection (L1-01 = 1, 2, or 4) when connecting the drive to a single motor, unless another motoroverload preventing device is installed. The drive electronic thermal overload function causes an oL1 fault, which shuts offthe output of the drive and prevents additional overheating of the motor. The motor temperature is continually calculated whilethe drive is powered up.n L1-02: Motor Overload Protection TimeSetting Range: 0.1 to 5.0 minFactory Default: 1.0 minParameter L1-02 determines how long the motor is allowed to operate before the oL1 fault occurs when the drive is runninga hot motor at 60 Hz and at 150% of the full load amp rating (E2-01) of the motor. Adjusting the value of L1-02 can shift theset of oL1 curves up the y axis of the diagram below, but will not change the shape of the curves.D.3 UL/cUL StandardsYASKAWA ELECTRIC TOEP C710616 45F YASKAWA AC Drive – Z1000 User Manual 375D Standards Compliance
