Warning against unintended start
1. The motor can be stopped with digital
commands, bus commands, references or a local
stop, while the frequency converter is connected
to mains. If personal safety considerations (e.g.
risk of personal injury caused by contact with
moving parts following an unintentional start)
make it necessary to ensure that no unintended
start occurs, these stop functions are not
sucient. In such cases, disconnect the mains
supply.
2. The motor may start while setting the
parameters. If this means that personal safety
may be compromised, motor starting must be
prevented, for instance by secure disconnection
of the motor connection.
3. A motor that has been stopped with the mains
supply connected, may start if faults occur in the
electronics of the frequency converter, through
temporary overload or if a fault in the power
supply grid or motor connection is remedied. If
unintended start must be prevented for personal
safety reasons, the normal stop functions of the
frequency converter are not sucient. In such
cases, disconnect the mains supply.
4. In rare cases, control signals from, or internally
within, the frequency converter may be activated
in error, be delayed, or fail to occur entirely.
When used in situations where safety is critical,
e.g. when controlling the electromagnetic brake
function of a hoist application, do not rely on
these control signals exclusively.
WARNING
HIGH VOLTAGE
Touching the electrical parts may be fatal even after the
equipment has been disconnected from mains.
Make sure that all voltage inputs have been discon-
nected, including load sharing (linkage of DC
intermediate circuit), as well as motor connection for
kinetic back up.
Systems where frequency converters are installed must, if
necessary, be equipped with additional monitoring and
protective devices according to valid safety regulations,
such as laws on mechanical tools, regulations for the
prevention of accidents, etc. Modications to the
frequency converters via the operating software are
allowed.
NOTICE
Hazardous situations shall be identied by the machine
builder/integrator responsible for considering necessary
preventive means. Additional monitoring and protective
devices may be included, always according to valid
national safety regulations, such as laws on mechanical
tools and regulations for the prevention of accidents.
WARNING
DISCHARGE TIME
The frequency converter contains DC-link capacitors,
which can remain charged even when the frequency
converter is not powered. High voltage can be present
even when the warning LED indicator lights are o.
Failure to wait the specied time after power has been
removed before performing service or repair work can
result in death or serious injury.
•
Stop the motor.
•
Disconnect AC mains and remote DC-link power
supplies, including battery back-ups, UPS, and
DC-link connections to other frequency
converters.
•
Disconnect or lock PM motor.
•
Wait for the capacitors to discharge fully. The
minimum waiting time is specied in Table 1.2
and is also visible on the product label on top
of the frequency converter.
•
Before performing any service or repair work,
use an appropriate voltage measuring device to
make sure that the capacitors are fully
discharged.
Voltage
[V]
Power range
[kW (hp)]
Minimum waiting
time
(minutes)
380–480
0.37–7.5 kW
(0.5–10 hp)
4
380–480
11–75 kW
(15–100 hp)
15
Table 1.2 Discharge Time
Introduction
VLT
®
AutomationDrive FC 360
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