Yaskawa AC Drive Z1000 Bypass Technical Manual - Manual (Page 31)

1.4 Bypass Component Descriptions
u Bypass Front Control Panel
The external appearance and component names of the Z1000 Bypass are shown in Figure 1.3 .
HOA keypad
Disconnect handle
Z1000 Drive
F2 F1
ESC M M
AUTO OFF
ENTER RESET
ALM DIGITAL OPERATOR JVOP-183
HAND
Alpha-numeric
LCD display
Figure 1.3 Z1000 Bypass Control Panel with Keypad Operator Controls
Refer to Using the HOA Keypad on page 91 for details on the HOA keypad.
n Input Disconnect Switch
Electrically located on the input power side of the bypass, the door mounted rotary input disconnect switch provides a means
of disconnecting the bypass from line power for equipment maintenance. The disconnect must be in the OFF position to open
the 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 position
n Contactors
The Z1000 Bypass is a 2-contactor or 3-contactor bypass circuit employing IEC rated contactors in an electrically interlocked
arrangement 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 current
or less. For this reason, the drive output contactor has a lower current rating than the bypass contactor. The bypass contactor
is exposed to motor inrush current (LRA) when starting the motor across-the-line and therefore requires a higher current rating.
1.4 Bypass Component Descriptions
YASKAWA ELECTRIC SIEP YAIZ1B 01D YASKAWA AC Drive – Z1000 Bypass Technical Manual 31
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Receiving