Installation And Maintenance Work - ABB ACS800-04 Hardware Manual

12 Safety instructions

Installation and maintenance work

These warnings are intended for all person that do work on the drive, motor cable or
motor.
WARNING! If you ignore these safety instructions, physical injury or death,
or damage to the equipment can occur:
•
Only qualified electricians are allowed to install and maintain the drive.
•
Do not do work on the drive, motor cable or motor when input power is
connected. After you disconnect the input power, wait for 5 minutes to let
the intermediate circuit capacitors discharge before you do work on the
drive, motor or motor cable.
Use a multimeter with a minimum impedance of 1 Mohm to measure that:
1. The voltage between input phases U1, V1 and W1 and the frame is close to
0 V.
2. The voltage between terminals UDC+ and UDC- and the frame is close to
0 V.
•
Do not do work on the control cables when the power is applied to the drive
or to the external control circuits. Externally-supplied control circuits can
cause dangerous voltages inside the drive even when the main power of the
drive is off.
•
Do not do insulation or voltage withstand tests on the drive or drive
modules.
•
When you connect the motor cable, make sure that the phase order is
correct.
•
After you maintain or modify a drive safety circuit, or change circuit boards
in the module, test the operation of the safety circuit according to the start-
up instructions.
•
Do not change the electrical installation of the drive except for the essential
control and power connections. Such changes can affect the safety or
operation of the drive. All customer-made changes are the responsibility of
the customer.
Notes
•
The motor cable terminals on the drive are at a dangerously high voltage
when the input power is on, regardless of whether the motor operates.
•
The brake control terminals (UDC+, UDC-, R+ and R- terminals) have a
dangerous DC voltage (over 500 V).
•
Depending on the external wiring, dangerous voltages (115 V, 220 V or
230 V) can be present on the terminals of relay outputs RO1 to RO3 or on the
optional AGPS board (Prevention of unexpected start-up, option +Q950).
•
The Prevention of unexpected start-up function (option +Q950) does not
remove the voltage from the main circuit or auxiliary circuits.
•
The Safe torque off function (option +Q967) does not remove the voltage
from the main circuit or auxiliary circuits.