Emergency Stop Devices; Restarting After An Emergency Stop; Prevention Of Unexpected Start; Selecting The Power Cables - ABB ACS800-07-0610-3 Hardware Manual

Emergency stop devices

For safety reasons, install the emergency stop devices at each operator control
station and at other operating stations where emergency stop may be needed.
Pressing the stop key (
switch of the drive from position "1" to "0" does not generate an emergency stop of
the motor or separate the drive from dangerous potential.
An emergency stop function is optionally available for stopping and switching off the
whole drive. Two modes are available: immediate removal of power (Category 0)
and controlled emergency stop (Category 1).

Restarting after an emergency stop

After an emergency stop, the emergency stop button must be released and a reset
performed before the main contactor (or air circuit breaker) can be closed and the
drive started.

Prevention of unexpected start

The drive can be equipped with an optional prevention of unexpected start function
according to standards IEC/EN 60204-1: 1997; ISO/DIS 14118: 2000 and EN 1037:
1996. The circuit conforms to EN954-1, Category 3.
The function is achieved by disconnecting the control voltage to the power
semiconductors of the inverters of the drive. Thus it is not possible for the power
semiconductors to switch and generate the AC voltage needed to rotate the motor.
In case of faulty main circuit components, the DC voltage from the busbars can be
conducted to the motor but an AC motor cannot rotate without the field generated by
an AC voltage.
The operator activates the prevention of unexpected start function using a switch
mounted on a control desk. When the function is activated, the switch is opened, and
an indicator lamp will light.
WARNING! The prevention of unexpected start function does not disconnect the
voltage of the main and auxiliary circuits from the drive. Therefore maintenance work
on electrical parts of the drive can only be carried out after isolating the drive system
from the main supply.
Note: If a running drive is stopped by using the prevention of unexpected start
function, the drive will cut off the motor supply voltage and the motor will coast to
stop.

Selecting the power cables

General rules

Dimension the supply (input power) and motor cables according to local
regulations:
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
) on the control panel of the drive, or turning the operating
Planning the electrical installation
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