D.3 UL Standards516 YASKAWA ELECTRIC SIEP C710616 27C YASKAWA AC Drive A1000 Technical ManualNote: Use crimp insulated terminals or insulated shrink tubing for wiring connections. Wires should have a continuous maximumallowable temperature of 75°C 600 Vac UL-approved vinyl-sheathed insulation.Input Fuse InstallationAlways install fuses at the drive input side. Refer to Installing Input Fuses on page 385 for selecting fuses.■ Low Voltage Wiring for Control Circuit TerminalsWire low voltage wires with NEC Class 1 circuit conductors. Refer to national state or local codes for wiring. Use a class2 (UL listed) power supply for the control circuit terminal when not using the drives internal control power supply.Table D.4 Control Circuit Terminal Power Supply■ Drive Short-Circuit RatingThis drive has undergone the UL short-circuit test, which certifies that during a short circuit in the power supply, thecurrent flow will not rise above 100,000 amps at 240 V for 200 V class drives and 480 V for 400 V class drives.• The MCCB, breaker protection, and fuse ratings shall be equal to or greater than the short-circuit tolerance of thepower supply being used.• Suitable for use on a circuit capable of delivering not more than 100,000 RMS symmetrical amperes for 240 V in 200V class drives (up to 480 V for 400 V class drives) motor overload protection.◆ Drive Motor Overload ProtectionSet parameter E2-01 (motor rated current) to the appropriate value to enable motor overload protection. The internalmotor overload protection is UL listed and in accordance with the NEC and CEC.■ E2-01 Motor Rated CurrentSetting Range: Model DependentDefault Setting: Model DependentParameter E2-01 (motor rated current) protects the motor if parameter L1-01 is not set to 0 (default is 1, enablingprotection for standard induction motors).If Auto-Tuning has been performed successfully, the motor data entered to T1-04 is automatically written into parameterE2-01. If Auto-Tuning has not been performed, manually enter the correct motor rated current to parameter E2-01.■ L1-01 Motor Overload Protection SelectionThe drive has an electronic overload protection function (oL1) based on time, output current, and output frequency,which protects the motor from overheating. The electronic thermal overload function is UL-recognized, so it does notrequire an external thermal relay for single motor operation.This parameter selects the motor overload curve used according to the type of motor applied.Table D.5 Overload Protection Settings<1> Use the specified crimp terminals (Model 14.NK4) when using CIMR-A
2A0030, 2A0040, 4A0018, and 4A0023 with 14 mm2 (6 AWG).Input / Output Terminal Signal Power Supply SpecificationsMulti-function digital inputs S1, S2, S3, S4, S5, S6, S7, S8, SCUse the internal control power supply of the drive or an external class 2power supply.Multi-function analog inputs +V, –V, A1, A2, A3, ACPulse train input RP, ACPulse train output MP, ACSafe disable inputs H1, H2, HCSafe disable outputs DM+, DM- Requires class 2 power supplySetting Description0 Disabled Disabled the drive’s internal motor overload protection.1 Standard fan cooled motor (default)Selects protection characteristics for a standard self cooled motor with limited cooling capabilities when running belowthe rated speed. The motor overload detection level (oL1) is automatically reduces when running below the motor ratedspeed.2 Drive duty motor with a speed range of 1:10 Selects protection characteristics for a motor with self-cooling capability within a speed range of 10:1. The motoroverload detection level (oL1) is automatically reduced when running below 1/10 of the motor rated speed.3 Vector motor with a speed range of 1:100 Selects protection characteristics for a motor capable of cooling itself at any speed — including zero speed (externallycooled motor). The motor overload detection level (oL1) is constant over the entire speed range.
