ABB NBRA-6 Series Installation And Startup Manual page 6

Safety Instructions
General Safety
Instructions
iv
WARNING! All electrical installation and maintenance work on
the ACS 600 should be carried out by qualified electricians. Exercise
appropriate care when working with the unit. Neglecting these
instructions can cause physical injury and death.
The drive and adjoining equipment must be properly earthed.
Do not attempt any work on a powered ACS 600. After switching off the
mains, always allow the intermediate circuit capacitors 5 minutes to
discharge before working on the frequency converter, the motor or the
motor cable. It is good practice to check (with a voltage indicating
instrument) that the frequency converter is in fact unpowered before
beginning work.
The ACS 600 motor cable terminals are at a dangerously high voltage
when mains power is applied, regardless of motor operation.
The ACS 600 intermediate circuit terminals (UDC+, UDC–) are at a
dangerously high voltage when the mains power of the ACS 600 is
applied.
The input busbars and terminals up to the fuse switch of the ACS 607
are at a dangerously high voltage when mains power is applied,
regardless of the position of the fuse switch handle in the cabinet door.
The terminals UDC+, UDC–, R+, and R– of the braking chopper are at
a dangerously high voltage when it is connected to the ACS 600 with
the mains power applied.
The terminals R+, and R– of the braking resistor are at a dangerously
high voltage when the resistor is connected to a powered braking
chopper.
The enable input terminal block of the braking chopper is at a
dangerously high voltage when the chopper is connected to the
ACS 600 with the mains power applied.
Dangerous voltages from external control circuits may be present
inside the ACS 600 even when its mains power is shut off.
More Warnings and Notes are printed at appropriate instances along
the text.
The General Safety Instructions given in the Installation and Start-up
Manual of the ACS 600 frequency converter should be studied before
attempting any work on or with the unit.
Installation and Start-up Guide for NBRA-6xx