14 Safety
Safety in installation and maintenance
These warnings are intended for all who work on the drive, motor cable or motor.
Electrical safety
WARNING! Ignoring the following instructions can cause physical injury or
death, or damage to the equipment.
• Only qualified electricians are allowed to install and maintain the drive!
• Be sure the system is properly earthed/groun
ded before applying power. Do not
apply AC or DC power before earths/grounds are connected.
• Never work on the drive, motor cable or motor when input power is applied. After
disconnecting the input power, always wait for 5 minutes to let the intermediate
circuit capacitors discharge before you start working on the drive, motor or motor
cable. Always ensure by measuring with a multimeter (impedance at least
1 Mohm) that:
1. Voltage between drive input phases L1, L2 and
L3 is close to 0 V.
2. Voltage between terminals UDC+ and UDC- and the frame is close to 0 V.
3. There is no voltage between terminals R+ and R- and the ground.
• Do not work on the control cables when power is applied to the drive or to the
external control circuits. Externally supplied control circuits may cause dangerous
voltages inside the drive even when the main power on the drive is switched off.
• Do not make any insulation or voltage withstand tests on the drive.
• Do not connect the drive to a voltage hi
gher than that marked on the type
designation label. Higher voltage can activate the brake chopper and lead to
brake resistor overload, or activate the over-voltage controller which can lead to
the motor rushing to maximum speed.
• If a drive is installed on a corner-gr
ounded TN system, the drive could be
damaged.
• All ELV (extra low voltage) circuits connected
to the drive must be used within a
zone of equipotential bonding, i.e. within a zone where all simultaneously
accessible conductive parts are electrically connected to prevent hazardous
voltages appearing between them. This is accomplished by proper factory
grounding.
• To prevent equipment damage, be certai
n that input and output signals are
powered and referenced correctly.
• To ensure reliable performance of this equipment be certain that all signals
to/from the drive are shielded correctly.
• Do not tin (solder) exposed wires. Solder con
tracts over time and can cause loose
connections. Use crimp connections where possible.
To Next Page
Loading...
Need help?
General
