1.4 Bypass Component Descriptionsu Bypass Front Control PanelThe external appearance and component names of the Z1000 Bypass are shown in Figure 1.3.HOA keypadDisconnect handleZ1000 DriveF2F1ESCM MAUTO OFFENTERRESETALMDIGITAL OPERATOR JVOP-183HANDAlpha-numericLCD displayFigure 1.3 Z1000 Bypass Control Panel with Keypad Operator ControlsRefer to Using the HOA Keypad on page 91 for details on the HOA keypad.n Input Disconnect SwitchElectrically located on the input power side of the bypass, the door mounted rotary input disconnect switch provides a meansof disconnecting the bypass from line power for equipment maintenance. The disconnect must be in the OFF position to openthe bypass enclosure door. When opened, the handle can be locked in the OFF position using a padlock.Branch short circuit protection for the bypass must be supplied by the customer.Figure 1.4 Disconnect Handle Shown in the OFF positionn ContactorsThe Z1000 Bypass is a 2-contactor or 3-contactor bypass circuit employing IEC rated contactors in an electrically interlockedarrangement to allow mutually exclusive operation in Drive or Bypass modes.The control logic and “soft start” characteristic of the drive limit the drive input and output contactors to motor FLA currentor less. For this reason, the drive output contactor has a lower current rating than the bypass contactor. The bypass contactoris exposed to motor inrush current (LRA) when starting the motor across-the-line and therefore requires a higher current rating.1.4 Bypass Component DescriptionsYASKAWA ELECTRIC SIEP YAIZ1B 01E YASKAWA AC Drive – Z1000 Bypass Technical Manual 311 Receiving
