ABB ACH580 Series Installation, Operation And Maintenance Manual page 34

34
Switch
S5
(BIAS)
5. Check installation
Before applying power, perform the following checks.
ACH580 Ultra-Low Harmonic Drives Installation
ACH580 Ultra-Low Harmonic Drives Installation, Operation and Maintenance Manual
Description
Switches on the biasing voltages to the bus. One
(and only one) device, preferably at the end of the
bus must have the bias on.
Check that ...
The ambient operating conditions meet the specification.
If the drive will be connected to a corner-grounded TN system: The internal EMC filter is
disconnected. (No metal screws.)
If the drive will be connected to an IT (ungrounded) system: The internal EMC filter and the
ground-to-phase varistor is disconnected. (No metal screws.)
If the drive has not been powered (either in storage or unused) over one year: The electrolytic
DC capacitors in the DC link of the drive have been reformed.
There is an adequately sized protective earth (ground) conductor between the drive and the
switchboard.
There is an adequately sized protective earth (ground) conductor between the motor and the
drive.
All protective earth (ground) conductors have been connected to the appropriate terminals and
the terminals have been tightened.
The supply voltage matches the nominal input voltage of the drive. Check the type designation
label.
The input power cable has been connected to appropriate terminals, and the terminals have
been properly tightened.
Appropriate supply fuses and disconnector have been installed.
The motor cable has been connected to appropriate terminals and the terminals have been
tightened.
The brake resistor cable (if present) has been connected to appropriate terminals, and the
terminals have been tightened.
The motor cable (and brake resistor cable, if present) have been properly wired through
conduits.
The control cables (if any) have been connected to the control board.
There are no tools, foreign objects or dust from drilling inside the drive.
Drive and motor connection box covers are in place.
The motor and the driven equipment are ready for start-up.
Position
ON
Bias off (default)
BIAS
ON
Bias on
BIAS